/* roulang page: index */
:root{
  --cq:#12C7D6;
  --cq-deep:#0A8C99;
  --cq-light:#7FE6F0;
  --orange:#FF6A2B;
  --bg:#060A14;
  --panel:#0E1524;
  --panel-2:#131C2E;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(18,199,214,.35);
  --txt:#E9EFF7;
  --txt-2:#9AABC2;
  --txt-3:#6C7E96;
  --ok:#2FBF8F;
  --warn:#FFB020;
  --r-card:16px;
  --r-modal:18px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 14px 32px -20px rgba(0,0,0,.65);
  --sh-2:0 22px 44px -22px rgba(0,0,0,.75);
  --sh-glow:0 10px 30px -10px rgba(255,106,43,.55);
  --sec:88px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--txt);
  background-color:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    radial-gradient(circle at 50% -12%, rgba(18,199,214,.055) 0 20%, transparent 20.3%),
    radial-gradient(circle at 50% -12%, transparent 0 28%, rgba(18,199,214,.04) 28% 28.35%, transparent 28.65%),
    radial-gradient(circle at 50% -12%, transparent 0 36%, rgba(18,199,214,.03) 36% 36.3%, transparent 36.6%),
    radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-repeat:no-repeat,no-repeat,no-repeat,repeat;
  background-size:100% 780px,100% 780px,100% 780px,24px 24px;
}
header,main,footer{position:relative;z-index:1;}
img{max-width:100%;display:block;}
a{color:var(--cq);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--cq-light);}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.01em;line-height:1.22;margin:0;color:var(--txt);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
.container{width:100%;padding-left:20px;padding-right:20px;margin:0 auto;}
@media (min-width:1200px){.container{max-width:1240px;}}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
:focus-visible{outline:2px solid var(--cq);outline-offset:2px;}

/* ============ 顶部信息条 ============ */
.topbar{
  height:36px;
  display:flex;
  align-items:center;
  background:rgba(10,16,28,.9);
  border-bottom:1px solid var(--line);
  font-size:12.5px;
  letter-spacing:.02em;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar-left{display:flex;align-items:center;gap:12px;color:var(--txt-3);min-width:0;}
.topbar-domain{color:var(--txt-2);font-weight:600;}
.topbar-sep{width:1px;height:12px;background:var(--line);display:inline-block;}
.topbar-hint{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-btn{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--cq);
  font-weight:700;
  font-size:12.5px;
  padding:3px 10px;
  border:1px solid var(--line-hover);
  border-radius:999px;
  transition:background .2s ease,color .2s ease;
}
.topbar-btn:hover{background:rgba(18,199,214,.12);color:var(--cq-light);}
@media (max-width:767.98px){
  .topbar{height:36px;}
  .topbar-hint,.topbar-sep{display:none;}
}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  border-bottom:1px solid transparent;
  transition:background .25s ease,backdrop-filter .25s ease,border-color .25s ease;
}
.site-header.is-stuck{
  background:rgba(20,30,48,.55);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:rgba(255,255,255,.10);
  box-shadow:0 1px 0 0 rgba(255,255,255,.06) inset,0 12px 30px -24px rgba(0,0,0,.9);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--txt);}
.brand:hover{color:var(--txt);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--cq),var(--cq-deep));
  color:#04141a;font-size:15px;
  box-shadow:0 8px 20px -10px rgba(18,199,214,.8);
}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:8px;}
.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-menu a{
  display:inline-block;
  padding:8px 12px;
  font-size:14.5px;
  font-weight:600;
  color:var(--txt-2);
  border-radius:8px;
  position:relative;
  transition:color .2s ease,background .2s ease;
  white-space:nowrap;
}
.nav-menu a:hover{color:var(--txt);background:rgba(255,255,255,.04);}
.nav-menu a.active{color:var(--txt);}
.nav-menu a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cq),var(--cq-light));
}
.nav-cta{
  margin-left:8px;
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 16px;
  font-size:14px;font-weight:700;
  color:var(--cq);
  border:1px solid var(--line-hover);
  border-radius:var(--r-btn);
  background:transparent;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.nav-cta:hover{background:rgba(18,199,214,.12);color:var(--cq-light);transform:translateY(-1px);}
.nav-toggle{
  display:none;
  width:42px;height:38px;
  align-items:center;justify-content:center;
  background:transparent;
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--txt);
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--line-hover);color:var(--cq-light);}
.nav-mask{
  position:fixed;inset:0;background:rgba(6,10,20,.7);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:1040;
}
.nav-mask.is-open{opacity:1;visibility:visible;}
@media (max-width:991.98px){
  .nav-toggle{display:inline-flex;}
  .nav-wrap{
    position:fixed;top:0;right:0;height:100vh;width:min(320px,86vw);
    background:var(--panel);border-left:1px solid var(--line);
    padding:78px 20px 28px;display:block;overflow-y:auto;
    transform:translateX(102%);transition:transform .28s ease;z-index:1050;
  }
  .nav-wrap.is-open{transform:none;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:2px;}
  .nav-menu a{padding:12px 10px;font-size:15.5px;border-radius:10px;}
  .nav-menu a.active{background:rgba(18,199,214,.10);}
  .nav-menu a.active::after{display:none;}
  .nav-cta{margin:16px 0 0;justify-content:center;width:100%;padding:12px 16px;}
}

/* ============ 通用按钮 ============ */
.btn-main,.btn-ghost,.btn-link-arrow{display:inline-flex;align-items:center;gap:8px;cursor:pointer;transition:all .2s ease;}
.btn-main{
  background:var(--orange);
  color:#100A06;
  border:1px solid var(--orange);
  border-radius:var(--r-btn);
  padding:14px 26px;
  font-weight:800;
  font-size:15.5px;
  box-shadow:var(--sh-glow);
}
.btn-main:hover{background:#ff7c45;border-color:#ff7c45;color:#100A06;transform:translateY(-1px);box-shadow:0 14px 34px -10px rgba(255,106,43,.7);}
.btn-main:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:var(--cq);
  border:1px solid var(--line-hover);
  border-radius:var(--r-btn);
  padding:14px 24px;
  font-weight:700;
  font-size:15.5px;
}
.btn-ghost:hover{background:rgba(18,199,214,.12);color:var(--cq-light);transform:translateY(-1px);}
.btn-link-arrow{
  background:none;border:none;padding:0;
  color:var(--cq);font-weight:700;font-size:14.5px;
}
.btn-link-arrow i{transition:transform .2s ease;}
.btn-link-arrow:hover{color:var(--cq-light);}
.btn-link-arrow:hover i{transform:translateX(4px);}
.btn-sm{padding:10px 18px;font-size:14px;}

/* ============ 板块骨架 ============ */
.section{padding:var(--sec) 0;}
.section-tight{padding:56px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--cq);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cq);border-radius:2px;}
.section-title{font-size:clamp(24px,3vw,36px);}
.section-sub{color:var(--txt-2);font-size:15.5px;margin-top:12px;max-width:640px;}
.panel-solid{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);}

/* ============ Hero ============ */
.hero{position:relative;padding:72px 0 88px;overflow:hidden;}
.hero::after{
  content:"";position:absolute;left:50%;top:-260px;transform:translateX(-50%);
  width:1200px;height:1200px;border-radius:50%;
  background:radial-gradient(circle, rgba(18,199,214,.10) 0%, rgba(18,199,214,0) 62%);
  pointer-events:none;z-index:-1;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;min-height:520px;}
.hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.22;
  margin-bottom:16px;
}
.hero h1 em{font-style:normal;color:var(--cq-light);}
.hero-sub{color:var(--txt-2);font-size:16.5px;max-width:600px;margin-bottom:26px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px;}
.trust-row{display:flex;flex-wrap:wrap;gap:22px;}
.trust-item{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--txt-2);}
.trust-item i{color:var(--cq);font-size:13px;}
.hero-visual{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);}
.hero-visual .hero-photo{
  aspect-ratio:16/11;
  background-image:linear-gradient(180deg,rgba(6,10,20,.25),rgba(6,10,20,.65)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero-visual .photo-tint{position:absolute;inset:0;background:rgba(18,199,214,.10);pointer-events:none;}
.glass-panel{
  position:absolute;left:18px;right:18px;bottom:18px;
  background:rgba(20,30,48,.55);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-radius:14px;
  padding:16px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.glass-panel::before{
  content:"";position:absolute;left:16px;right:16px;top:0;height:1px;
  background:linear-gradient(90deg,rgba(18,199,214,0),rgba(18,199,214,.75),rgba(18,199,214,0));
}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;}
.metric-cell{padding:10px 12px;}
.metric-cell:nth-child(odd){border-right:1px solid rgba(255,255,255,.08);}
.metric-cell:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.08);}
.metric-num{
  font-size:clamp(20px,2.2vw,26px);font-weight:800;color:var(--txt);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.metric-num span{font-size:12.5px;color:var(--cq);font-weight:700;margin-left:3px;}
.metric-label{font-size:12.5px;color:var(--txt-3);margin-top:3px;}
@media (max-width:991.98px){
  .hero{padding:52px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;min-height:0;}
}

/* ============ 痛点提问 ============ */
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.pain-card{
  background:var(--panel);border:1px solid var(--line);border-left:2px solid rgba(18,199,214,.55);
  border-radius:var(--r-card);padding:24px 22px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.pain-card:hover{transform:translateY(-3px);border-color:var(--line-hover);border-left-color:var(--cq);box-shadow:var(--sh-2);}
.pain-idx{font-size:12.5px;font-weight:800;color:var(--cq);letter-spacing:.16em;font-variant-numeric:tabular-nums;}
.pain-q{font-size:17px;font-weight:700;margin:12px 0 8px;line-height:1.5;}
.pain-a{font-size:13.5px;color:var(--txt-2);line-height:1.7;}
@media (max-width:991.98px){.pain-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:575.98px){.pain-grid{grid-template-columns:1fr;}}

/* ============ 方案卡片 ============ */
.solution-row{display:grid;gap:22px;margin-bottom:22px;}
.solution-row.row-a{grid-template-columns:repeat(3,1fr);}
.solution-row.row-b{grid-template-columns:1fr 1fr 1fr;}
.solution-card{
  background:var(--panel);border:1px solid var(--line);border-top:2px solid rgba(18,199,214,.5);
  border-radius:var(--r-card);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.solution-card:hover{transform:translateY(-3px);border-color:var(--line-hover);border-top-color:var(--cq);box-shadow:var(--sh-2);}
.solution-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;border-radius:0;}
.solution-thumb img{width:100%;height:100%;object-fit:cover;}
.solution-thumb::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);}
.solution-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.solution-body h3{font-size:20px;}
.solution-body p{font-size:14px;color:var(--txt-2);line-height:1.72;}
.solution-body .btn-link-arrow{margin-top:auto;padding-top:6px;}
.cta-card{
  background:linear-gradient(150deg,var(--panel-2),rgba(18,199,214,.10));
  border:1px dashed var(--line-hover);
  border-radius:var(--r-card);padding:26px;display:flex;flex-direction:column;gap:14px;justify-content:center;
}
.cta-card h3{font-size:20px;}
.cta-card p{font-size:14px;color:var(--txt-2);}
@media (max-width:991.98px){
  .solution-row.row-a,.solution-row.row-b{grid-template-columns:1fr 1fr;}
}
@media (max-width:767.98px){
  .solution-row.row-a,.solution-row.row-b{grid-template-columns:1fr;}
}

/* ============ 数据区 ============ */
.stats-band{
  background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:44px 28px;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-item{padding:6px 22px;border-right:1px solid var(--line);}
.stat-item:last-child{border-right:none;}
.stat-num{font-size:clamp(28px,3.4vw,40px);font-weight:800;font-variant-numeric:tabular-nums;line-height:1.1;}
.stat-num span{font-size:15px;color:var(--orange);margin-left:4px;font-weight:800;}
.stat-cap{font-size:13.5px;color:var(--txt-2);margin-top:8px;}
@media (max-width:991.98px){
  .stats-grid{grid-template-columns:1fr 1fr;gap:0;}
  .stat-item{padding:18px 20px;border-bottom:1px solid var(--line);}
  .stat-item:nth-child(2n){border-right:none;}
  .stat-item:nth-last-child(-n+2){border-bottom:none;}
}

/* ============ 资讯列表 ============ */
.news-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:24px;}
.news-feature{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-feature:hover{transform:translateY(-3px);border-color:var(--line-hover);box-shadow:var(--sh-2);}
.news-feature-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;}
.news-feature-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.news-feature:hover .news-feature-thumb img{transform:scale(1.03);}
.news-feature-thumb::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);}
.news-feature-body{padding:24px;display:flex;flex-direction:column;gap:12px;}
.news-feature-body h3{font-size:22px;line-height:1.4;}
.news-feature:hover .news-feature-body h3{color:var(--cq-light);}
.news-feature-body p{font-size:14px;color:var(--txt-2);}
.news-side{display:flex;flex-direction:column;gap:14px;}
.news-row{
  display:grid;grid-template-columns:112px 1fr;gap:16px;
  background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px;
  position:relative;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-row::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:var(--cq);transform:scaleY(0);transform-origin:top;transition:transform .25s ease;
}
.news-row:hover{transform:translateX(4px);border-color:var(--line-hover);box-shadow:var(--sh-1);}
.news-row:hover::before{transform:scaleY(1);}
.news-row:hover h3{color:var(--cq-light);}
.news-row-thumb{aspect-ratio:4/3;border-radius:var(--r-img);overflow:hidden;position:relative;}
.news-row-thumb img{width:100%;height:100%;object-fit:cover;}
.news-row-thumb::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);}
.news-row h3{font-size:15.5px;line-height:1.5;transition:color .2s ease;}
.news-row .row-meta{margin-top:8px;}
.row-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--txt-3);}
.badge-cat{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:999px;
  font-size:12px;font-weight:700;color:var(--cq);
  background:rgba(18,199,214,.12);border:1px solid rgba(18,199,214,.28);
}
.badge-time{font-variant-numeric:tabular-nums;}
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;
  background:var(--panel);border:1px dashed var(--line);border-radius:var(--r-card);padding:56px 24px;
}
.empty-state i{font-size:32px;color:var(--cq-deep);}
.empty-state p{color:var(--txt-2);font-size:15px;}
@media (max-width:991.98px){.news-layout{grid-template-columns:1fr;}}
@media (max-width:575.98px){
  .news-row{grid-template-columns:96px 1fr;gap:12px;}
  .news-feature-body h3{font-size:19px;}
}

/* ============ 转化条 + 隐私 ============ */
.convert-bar{
  background:linear-gradient(120deg,rgba(18,199,214,.14),rgba(255,106,43,.10));
  border:1px solid var(--line-hover);
  border-radius:var(--r-card);
  padding:34px 32px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.convert-bar h2{font-size:clamp(20px,2.4vw,28px);margin-bottom:8px;}
.convert-bar p{color:var(--txt-2);font-size:14.5px;}
.privacy-note{
  display:flex;align-items:flex-start;gap:10px;
  margin-top:18px;font-size:12px;color:var(--txt-3);line-height:1.7;
}
.privacy-note input[type="checkbox"]{
  appearance:none;width:15px;height:15px;margin-top:3px;flex:0 0 auto;
  border:1px solid var(--line-hover);border-radius:4px;background:var(--panel);
  cursor:pointer;position:relative;transition:background .2s ease;
}
.privacy-note input[type="checkbox"]:checked{background:var(--cq);border-color:var(--cq);}
.privacy-note input[type="checkbox"]:checked::after{
  content:"";position:absolute;left:4px;top:1px;width:5px;height:9px;
  border:solid #04141a;border-width:0 2px 2px 0;transform:rotate(45deg);
}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;}
.accordion-item{
  background:transparent;border:none;border-bottom:1px solid var(--line);
  border-radius:0 !important;
}
.accordion-item:first-of-type{border-top:1px solid var(--line);}
.accordion-button{
  background:transparent;color:var(--txt);
  font-size:16.5px;font-weight:700;
  padding:22px 46px 22px 16px;
  border-radius:0 !important;box-shadow:none !important;
  border-left:3px solid transparent;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.accordion-button:not(.collapsed){
  color:var(--cq-light);background:rgba(18,199,214,.05);border-left-color:var(--cq);
}
.accordion-button:hover{color:var(--cq-light);background:rgba(255,255,255,.03);}
.accordion-button::after{
  content:"+";background-image:none !important;
  font-size:20px;font-weight:400;color:var(--cq);
  width:auto;height:auto;line-height:1;transform:none;
  position:absolute;right:16px;top:50%;margin-top:-12px;
}
.accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.accordion-body{
  padding:0 46px 24px 19px;color:var(--txt-2);font-size:14.5px;line-height:1.85;
}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(14,21,36,.6),rgba(6,10,20,1));
  padding:64px 0 0;
  margin-top:24px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{font-size:13.5px;color:var(--txt-2);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:14px;font-weight:800;color:var(--txt);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--txt-2);}
.footer-col a:hover{color:var(--cq-light);}
.footer-contact li{display:flex;gap:10px;font-size:13.5px;color:var(--txt-2);align-items:flex-start;}
.footer-contact i{color:var(--cq);margin-top:4px;font-size:12.5px;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--txt-3);
}
.footer-bottom .num{color:var(--txt-3);}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr;gap:26px;}
}

/* ============ 弹层 ============ */
.modal-content{
  background:rgba(20,30,48,.82);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-modal);
  color:var(--txt);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 30px 70px -30px rgba(0,0,0,.9);
}
.modal-header{border-bottom:1px solid var(--line);padding:22px 24px;}
.modal-title{font-size:19px;font-weight:800;}
.modal-body{padding:22px 24px;}
.modal-footer{border-top:1px solid var(--line);padding:16px 24px;justify-content:flex-start;}
.modal-close{
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--txt-2);
  display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,color .2s ease;
}
.modal-close:hover{border-color:var(--line-hover);color:var(--cq-light);}
.modal-backdrop.show{opacity:.72;background:#060A14;}
.form-label{font-size:13.5px;color:var(--txt-2);margin-bottom:6px;font-weight:600;}
.form-control,.form-select{
  background:var(--panel);border:1px solid var(--line);border-radius:10px;
  color:var(--txt);padding:11px 14px;font-size:14.5px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-control::placeholder{color:var(--txt-3);}
.form-control:focus,.form-select:focus{
  background:var(--panel);border-color:var(--cq);color:var(--txt);
  box-shadow:0 0 0 3px rgba(18,199,214,.14);outline:none;
}
.form-select option{background:var(--panel);color:var(--txt);}
.form-hint{font-size:12px;color:var(--txt-3);margin-top:8px;}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .3s ease,transform .3s ease;}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{transition:none !important;animation:none !important;}
}
@media (max-width:991.98px){:root{--sec:64px;}}
@media (max-width:575.98px){:root{--sec:52px;}}

/* roulang page: category1 */
:root{
  --c-main:#12C7D6;
  --c-main-deep:#0A8C99;
  --c-main-light:#7FE6F0;
  --c-accent:#FF6A2B;
  --bg:#060A14;
  --panel:#0E1524;
  --panel-2:#131C2E;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(18,199,214,.35);
  --txt:#E9EFF7;
  --txt-2:#9AABC2;
  --txt-3:#6C7E96;
  --ok:#2FBF8F;
  --warn:#FFB020;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:18px;
  --shadow-1:0 14px 32px -20px rgba(0,0,0,.65);
  --shadow-2:0 22px 44px -22px rgba(0,0,0,.75);
  --glow-accent:0 10px 30px -10px rgba(255,106,43,.55);
  --sec-pad:88px;
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--txt);
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    radial-gradient(120% 60% at 50% -12%, rgba(18,199,214,.10) 0%, rgba(18,199,214,0) 62%),
    repeating-radial-gradient(circle at 50% -18%, rgba(18,199,214,.055) 0 1px, rgba(18,199,214,0) 1px 96px),
    radial-gradient(rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:auto, auto, 24px 24px;
  background-position:center top, center top, 0 0;
  opacity:.9;
}
img{max-width:100%;display:block}
a{color:var(--c-main-light);text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease}
a:hover{color:var(--c-main)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.22;color:var(--txt)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-main);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
.section{padding:var(--sec-pad) 0;position:relative;z-index:1}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--c-main);
  padding:5px 12px;border:1px solid var(--line-hover);border-radius:999px;
  background:rgba(18,199,214,.08);margin-bottom:18px;
}
.sec-head h2{font-size:clamp(24px,3vw,36px);margin-bottom:14px}
.sec-head p{color:var(--txt-2);font-size:16.5px}

/* ---------- 顶部信息条 ---------- */
.topbar{
  height:36px;
  border-bottom:1px solid var(--line);
  background:rgba(6,10,20,.92);
  position:relative;z-index:1035;
}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.topbar-left{display:flex;align-items:center;gap:16px;font-size:12.5px;letter-spacing:.02em;color:var(--txt-3)}
.topbar-left .dot{width:5px;height:5px;border-radius:50%;background:var(--c-main);display:inline-block;margin-right:6px;vertical-align:1px}
.topbar-left .dom{color:var(--txt-2)}
.topbar-mini{
  font-size:12.5px;color:var(--c-main-light);border:1px solid var(--line-hover);
  padding:3px 12px;border-radius:999px;background:rgba(18,199,214,.08);
}
.topbar-mini:hover{background:rgba(18,199,214,.16);color:var(--c-main-light)}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  border-bottom:1px solid transparent;
  transition:background-color .26s ease,border-color .26s ease,backdrop-filter .26s ease;
}
.site-header.is-scrolled{
  background:rgba(20,30,48,.55);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid rgba(255,255,255,.10);
  box-shadow:0 14px 32px -24px rgba(0,0,0,.9);
}
.site-header.is-scrolled::after{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,0) 0%,rgba(127,230,240,.45) 50%,rgba(255,255,255,0) 100%);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--txt)}
.brand:hover{color:var(--txt)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--c-main) 0%,var(--c-main-deep) 100%);
  color:#04222a;font-size:15px;box-shadow:0 8px 18px -10px rgba(18,199,214,.8);
}
.brand-text{font-weight:800;font-size:16.5px;letter-spacing:-.01em;white-space:nowrap}
.nav-wrap{display:flex;align-items:center;gap:18px}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{
  display:block;padding:10px 12px;font-size:14.5px;color:var(--txt-2);
  border-radius:8px;position:relative;white-space:nowrap;
}
.nav-menu a:hover{color:var(--txt);background:rgba(18,199,214,.08)}
.nav-menu a.active{color:var(--txt)}
.nav-menu a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-main);border-radius:2px;
}
.nav-cta{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--c-accent);color:#170B03;font-weight:700;font-size:14px;
  padding:9px 16px;border-radius:var(--r-btn);
  box-shadow:var(--glow-accent);
  transition:transform .22s ease,filter .22s ease,box-shadow .22s ease;
}
.nav-cta:hover{color:#170B03;filter:brightness(1.08);transform:translateY(-1px)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  background:rgba(18,199,214,.10);border:1px solid var(--line-hover);
  color:var(--c-main-light);font-size:16px;
}

/* ---------- 内页 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:52px 0 56px;
  border-bottom:1px solid var(--line);
  background:var(--panel);
}
.page-hero-bg{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;aspect-ratio:21/9;opacity:.34;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,10,20,.95) 0%,rgba(6,10,20,.78) 52%,rgba(6,10,20,.55) 100%),
             linear-gradient(180deg,rgba(6,10,20,.15) 0%,rgba(6,10,20,.92) 100%);
}
.page-hero .container{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--txt-3);margin-bottom:22px}
.crumbs a{color:var(--txt-2)}
.crumbs span.sep{color:var(--txt-3)}
.crumbs .cur{color:var(--c-main-light)}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);margin-bottom:16px;max-width:900px;
}
.page-hero h1 .h1-kicker{
  display:block;font-size:13px;font-weight:600;letter-spacing:.14em;
  color:var(--c-main);margin-bottom:14px;text-transform:none;
}
.hero-lead{color:var(--txt-2);font-size:17px;max-width:720px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn-brand{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--c-accent);color:#170B03;font-weight:700;font-size:15px;
  padding:13px 22px;border-radius:var(--r-btn);border:0;
  box-shadow:var(--glow-accent);
  transition:transform .22s ease,filter .22s ease,box-shadow .22s ease;
}
.btn-brand:hover{color:#170B03;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 14px 34px -10px rgba(255,106,43,.65)}
.btn-brand:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:transparent;color:var(--c-main-light);font-weight:600;font-size:15px;
  padding:12px 20px;border-radius:var(--r-btn);border:1px solid var(--line-hover);
  transition:background-color .22s ease,transform .22s ease,color .22s ease;
}
.btn-ghost:hover{background:rgba(18,199,214,.12);color:var(--c-main-light);transform:translateY(-1px)}
.hero-facts{display:flex;flex-wrap:wrap;gap:24px;margin-top:30px}
.hero-fact{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--txt-2)}
.hero-fact i{color:var(--c-main)}

/* ---------- 图文交替 ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
}
.split + .split{margin-top:64px}
.split.reverse .split-media{order:2}
.split.reverse .split-body{order:1}
.media{
  position:relative;overflow:hidden;border-radius:var(--r-img);
  border:1px solid var(--line);background:var(--panel-2);
  aspect-ratio:16/10;box-shadow:var(--shadow-1);
}
.media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.media::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);pointer-events:none}
.split:hover .media img{transform:scale(1.04)}
.split-body h3{font-size:22px;margin-bottom:14px}
.split-body p{color:var(--txt-2);margin-bottom:18px;max-width:560px}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;color:var(--txt-2);padding:7px 0;
}
.check-list i{color:var(--ok);font-size:13px;margin-top:7px}
.check-list strong{color:var(--txt);font-weight:600}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{
  background:var(--panel);border:1px solid var(--line);border-left:2px solid var(--c-main);
  border-radius:var(--r-card);padding:26px 24px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.scene-card:hover{transform:translate(-2px,-3px);box-shadow:var(--shadow-2);border-color:var(--line-hover);border-left-color:var(--c-main-light)}
.scene-card .idx{
  font-variant-numeric:tabular-nums;font-size:13px;letter-spacing:.14em;
  color:var(--c-main);display:block;margin-bottom:14px;
}
.scene-card h3{font-size:19px;margin-bottom:10px}
.scene-card p{color:var(--txt-2);font-size:15px}
.scene-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;color:var(--c-main-light);
  background:rgba(18,199,214,.10);border:1px solid var(--line-hover);
  padding:4px 11px;border-radius:999px;
}
.badge-plain{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;color:var(--txt-2);background:var(--panel-2);
  border:1px solid var(--line);padding:4px 11px;border-radius:999px;
}

/* ---------- 须知面板 ---------- */
.notice-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px 32px;box-shadow:var(--shadow-1);
}
.notice-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 40px;margin-top:24px}
.notice-row{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 0;border-bottom:1px solid var(--line);
}
.notice-row:last-child{border-bottom:0}
.notice-row .rn{font-variant-numeric:tabular-nums;color:var(--c-main);font-size:13px;letter-spacing:.1em;flex:0 0 30px;margin-top:5px}
.notice-row h4{font-size:16px;font-weight:700;margin-bottom:5px;color:var(--txt)}
.notice-row p{color:var(--txt-2);font-size:14.5px}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;color:var(--txt);
  font-size:17px;font-weight:700;text-align:left;padding:22px 16px 22px 18px;
  position:relative;transition:color .22s ease,background-color .22s ease;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;
  background:transparent;border-radius:3px;transition:background-color .22s ease;
}
.faq-q:hover{color:var(--c-main-light)}
.faq-q[aria-expanded="true"]{color:var(--c-main-light)}
.faq-q[aria-expanded="true"]::before{background:var(--c-main)}
.faq-icon{position:relative;width:14px;height:14px;flex:0 0 14px;color:var(--c-main)}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;
  transition:transform .22s ease;
}
.faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%)}
.faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%)}
.faq-q[aria-expanded="true"] .faq-icon::after{transform:translate(-50%,-50%) scaleY(0)}
.faq-a{padding:0 46px 24px 21px;color:var(--txt-2);font-size:15.5px}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--panel-2) 0%,var(--panel) 60%,rgba(18,199,214,.10) 100%);
  border:1px solid var(--line);border-radius:var(--r-card);
  padding:38px 36px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  box-shadow:var(--shadow-1);position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--c-main),var(--c-accent));
}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);margin-bottom:8px}
.cta-band p{color:var(--txt-2);font-size:15px;max-width:640px}
.privacy-note{
  display:flex;align-items:flex-start;gap:9px;
  font-size:12px;color:var(--txt-3);line-height:1.7;margin-top:26px;
}
.privacy-note input{margin-top:3px;accent-color:var(--c-main)}
.privacy-note a{color:var(--txt-2);text-decoration:underline;text-underline-offset:3px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:#050810;position:relative;z-index:1;margin-top:88px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding:60px 0 44px;
}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{color:var(--txt-2);font-size:14.5px;max-width:360px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--txt)}
.footer-col ul li{margin-bottom:11px}
.footer-col ul li a{color:var(--txt-2);font-size:14.5px}
.footer-col ul li a:hover{color:var(--c-main-light)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:var(--txt-2);font-size:14.5px}
.footer-contact i{color:var(--c-main);margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  border-top:1px solid var(--line);padding:20px 0;font-size:13px;color:var(--txt-3);
}
.footer-bottom .num{color:var(--txt-3)}

/* ---------- 模态 ---------- */
.modal-content{
  background:rgba(20,30,48,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-modal);color:var(--txt);overflow:hidden;
  box-shadow:var(--shadow-2);
}
.modal-content::before{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,0),rgba(127,230,240,.5),rgba(255,255,255,0));
}
.modal-header{border-bottom:1px solid var(--line);padding:22px 26px}
.modal-title{font-size:19px;font-weight:800}
.modal-sub{font-size:13px;color:var(--txt-2);margin-top:6px}
.modal-body{padding:24px 26px}
.btn-close-x{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--line-hover);
  background:transparent;color:var(--c-main-light);display:grid;place-items:center;
}
.btn-close-x:hover{background:rgba(18,199,214,.12)}
.form-label{font-size:13.5px;color:var(--txt-2);margin-bottom:7px}
.form-control,.form-select{
  background:var(--panel);border:1px solid var(--line);color:var(--txt);
  border-radius:var(--r-btn);padding:11px 14px;font-size:15px;
}
.form-control::placeholder{color:var(--txt-3)}
.form-control:focus,.form-select:focus{
  background:var(--panel);color:var(--txt);
  border-color:var(--c-main);box-shadow:0 0 0 3px rgba(18,199,214,.16);outline:none;
}
.form-select option{background:var(--panel);color:var(--txt)}
.modal-footer{border-top:1px solid var(--line);padding:18px 26px;gap:12px}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--sec-pad:72px}
  .split{gap:40px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:991px){
  :root{--sec-pad:64px}
  .nav-toggle{display:grid;place-items:center}
  .nav-wrap{
    position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;
    flex-direction:column;align-items:stretch;gap:8px;
    background:rgba(11,18,32,.97);
    backdrop-filter:blur(14px);
    border-left:1px solid var(--line);
    padding:84px 22px 30px;transform:translateX(105%);
    transition:transform .28s ease;overflow-y:auto;z-index:1040;
  }
  .nav-wrap.open{transform:translateX(0);box-shadow:-24px 0 60px -30px rgba(0,0,0,.9)}
  .nav-wrap::before{
    content:"";position:fixed;inset:0;background:rgba(6,10,20,.7);
    opacity:0;pointer-events:none;transition:opacity .28s ease;z-index:-1;
  }
  .nav-wrap.open::before{opacity:1;pointer-events:auto}
  .nav-menu{flex-direction:column;align-items:stretch;gap:2px}
  .nav-menu a{padding:13px 12px;font-size:15px;border-bottom:1px solid var(--line)}
  .nav-menu a.active::after{display:none}
  .nav-menu a.active{color:var(--c-main-light);background:rgba(18,199,214,.10)}
  .nav-cta{justify-content:center;margin-top:14px;padding:12px 16px}
  .split{grid-template-columns:1fr;gap:26px}
  .split.reverse .split-media,.split.reverse .split-body{order:0}
  .scene-grid{grid-template-columns:1fr 1fr}
  .page-hero{padding:42px 0 46px}
}
@media (max-width:767px){
  :root{--sec-pad:52px}
  body{font-size:16px}
  .topbar-left .tip{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 32px}
  .footer-brand{grid-column:1/-1}
  .notice-grid{grid-template-columns:1fr;gap:0}
  .cta-band{padding:28px 24px}
  .faq-q{font-size:16px;padding:18px 12px 18px 16px}
  .faq-a{padding:0 20px 20px 16px}
}
@media (max-width:575px){
  .scene-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-facts{gap:14px 20px}
  .page-hero h1{font-size:clamp(30px,8vw,38px)}
  .nav-inner{height:60px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --brand:#12C7D6;
  --brand-deep:#0A8C99;
  --brand-soft:#7FE6F0;
  --accent:#FF6A2B;
  --bg:#060A14;
  --panel:#0E1524;
  --panel-2:#131C2E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(18,199,214,.35);
  --text:#E9EFF7;
  --text-2:#9AABC2;
  --text-3:#6C7E96;
  --ok:#2FBF8F;
  --warn:#FFB020;
  --r-card:16px;
  --r-lg:18px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 14px 32px -20px rgba(0,0,0,.65);
  --sh-2:0 22px 44px -22px rgba(0,0,0,.75);
  --glow:0 10px 30px -10px rgba(255,106,43,.55);
  --wrap:1240px;
  --wrap-narrow:800px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    repeating-radial-gradient(circle at 50% -38%, rgba(18,199,214,.075) 0 1px, transparent 1px 82px),
    radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:auto,24px 24px;
  opacity:.9;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 42%,rgba(0,0,0,.25) 70%,transparent 92%);
  mask-image:linear-gradient(180deg,#000 0%,#000 42%,rgba(0,0,0,.25) 70%,transparent 92%);
}
img{max-width:100%;display:block;}
a{color:var(--brand-soft);text-decoration:none;}
a:hover{color:var(--brand);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.24;font-weight:800;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(18,199,214,.35);color:#fff;}

.container,.container-narrow{
  width:100%;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.container{max-width:var(--wrap);}
.container-narrow{max-width:var(--wrap-narrow);}

.site-header,main,.site-footer{position:relative;z-index:2;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(6,10,20,.94);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(20,30,48,.62);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:rgba(255,255,255,.10);
  box-shadow:0 16px 34px -24px rgba(0,0,0,.9);
}
.nav-inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 24px;
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex:0 0 auto;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04141a;font-size:16px;
  box-shadow:0 10px 22px -14px rgba(18,199,214,.95);
}
.brand-text{font-size:17px;font-weight:800;white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:14px;}
.nav-menu{
  list-style:none;display:flex;align-items:center;gap:2px;
  margin:0;padding:0;
}
.nav-menu a{
  display:block;
  padding:9px 12px;
  border-radius:8px;
  font-size:14.5px;
  color:var(--text-2);
  transition:color .2s ease,background .2s ease;
  white-space:nowrap;
}
.nav-menu a:hover{color:var(--text);background:rgba(18,199,214,.10);}
.nav-menu a.active{color:var(--text);position:relative;}
.nav-menu a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  border-radius:2px;background:var(--brand);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 16px;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:700;
  color:#FFE9DE;background:transparent;
  border:1px solid rgba(255,106,43,.55);
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--accent);color:#1B0A02;transform:translateY(-1px);box-shadow:var(--glow);}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:11px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--text);font-size:17px;
  cursor:pointer;
}
.nav-mask{
  position:fixed;inset:0;z-index:1100;
  background:rgba(6,10,20,.72);
  opacity:0;visibility:hidden;transition:.25s ease;
}
.nav-mask.show{opacity:1;visibility:visible;}

/* ---------- Buttons ---------- */
.btn-main,.btn-ghost,.btn-text{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  font-weight:700;
  cursor:pointer;
  border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease,filter .2s ease;
}
.btn-main{
  padding:13px 24px;font-size:15.5px;
  background:var(--accent);color:#1B0A02;
  box-shadow:var(--glow);
}
.btn-main:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 14px 34px -10px rgba(255,106,43,.7);color:#1B0A02;}
.btn-main:active{transform:translateY(0);}
.btn-ghost{
  padding:13px 24px;font-size:15.5px;
  background:transparent;color:var(--brand-soft);
  border-color:rgba(18,199,214,.45);
}
.btn-ghost:hover{background:rgba(18,199,214,.12);color:var(--brand-soft);transform:translateY(-1px);}
.btn-text{
  padding:0;border:none;background:none;
  color:var(--brand-soft);font-size:14.5px;font-weight:600;
}
.btn-text i{transition:transform .2s ease;}
.btn-text:hover{color:var(--brand);}
.btn-text:hover i{transform:translateX(4px);}

/* ---------- Article Hero ---------- */
.article-hero{
  position:relative;
  padding:34px 0 46px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.article-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center 40%;
  opacity:.22;
}
.article-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,.82) 0%,rgba(6,10,20,.94) 62%,var(--bg) 100%);
}
.article-hero .container{position:relative;z-index:2;}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:20px;
}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs i{font-size:10px;color:var(--text-3);}
.crumbs .current{color:var(--text-3);}
.hero-inner{max-width:920px;}
.hero-tagline{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--brand-soft);
  background:rgba(18,199,214,.10);
  border:1px solid rgba(18,199,214,.28);
  margin-bottom:16px;
}
.article-hero h1{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.26;
  color:#F4F8FD;
}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:20px;font-size:13.5px;color:var(--text-2);
}
.hero-meta .meta-item{display:inline-flex;align-items:center;gap:7px;}
.hero-meta i{color:var(--brand);font-size:13px;}
.hero-meta .num{font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- Article body ---------- */
.article-body{padding:56px 0 20px;}
.cms-content{font-size:17px;line-height:1.85;color:#C9D6E5;}
.cms-content > *:first-child{margin-top:0;}
.cms-content p{margin:0 0 1.2em;}
.cms-content h2{
  position:relative;
  font-size:clamp(21px,2.4vw,27px);
  color:#F1F6FC;
  margin:44px 0 16px;
  padding-left:16px;
}
.cms-content h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--brand),var(--brand-deep));
}
.cms-content h3{
  font-size:20px;color:#EAF2FA;margin:30px 0 12px;
}
.cms-content h4{font-size:17.5px;color:#EAF2FA;margin:24px 0 10px;}
.cms-content ul,.cms-content ol{margin:0 0 1.2em;padding-left:1.35em;}
.cms-content li{margin:.4em 0;}
.cms-content li::marker{color:var(--brand);}
.cms-content blockquote{
  margin:26px 0;padding:16px 20px;
  border-left:3px solid var(--brand);
  background:rgba(18,199,214,.07);
  border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--text-2);
}
.cms-content blockquote p:last-child{margin-bottom:0;}
.cms-content img{
  max-width:100%;height:auto;
  border-radius:var(--r-img);
  margin:26px auto;
}
.cms-content figure{margin:26px 0;}
.cms-content figcaption{
  text-align:center;font-size:13px;color:var(--text-3);margin-top:-14px;
}
.cms-content a{color:var(--brand-soft);text-decoration:underline;text-underline-offset:3px;}
.cms-content a:hover{color:var(--brand);}
.cms-content strong{color:#F1F6FC;}
.cms-content table{
  width:100%;border-collapse:collapse;margin:26px 0;
  font-size:15px;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--r-img);
  overflow:hidden;
}
.cms-content th,.cms-content td{
  border:1px solid var(--line);padding:11px 14px;text-align:left;
  vertical-align:top;
}
.cms-content th{background:var(--panel-2);color:#EAF2FA;font-weight:700;}
.cms-content hr{border:none;border-top:1px solid var(--line);margin:36px 0;}
.cms-content code{
  background:rgba(18,199,214,.10);color:var(--brand-soft);
  padding:2px 6px;border-radius:6px;font-size:.92em;
}

/* ---------- Empty state ---------- */
.empty-state{
  text-align:center;
  padding:56px 28px;
  background:var(--panel);
  border:1px solid var(--line);
  border-top:2px solid var(--brand);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.empty-state .empty-icon{
  width:60px;height:60px;margin:0 auto 18px;
  border-radius:16px;display:grid;place-items:center;
  background:rgba(18,199,214,.10);
  border:1px solid rgba(18,199,214,.28);
  color:var(--brand);font-size:23px;
}
.empty-state h2{font-size:21px;margin-bottom:10px;color:#F1F6FC;}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:22px;}

/* ---------- Tag row ---------- */
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin:44px 0 0;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.tag-row .tag-label{font-size:13.5px;color:var(--text-3);margin-right:2px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  font-size:13px;color:var(--text-2);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  transition:.2s ease;
}
.tag:hover{color:var(--brand-soft);border-color:var(--line-strong);background:rgba(18,199,214,.10);}

/* ---------- Related ---------- */
.related{padding:64px 0 10px;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:28px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px);color:#F2F7FC;}
.section-head p{font-size:14.5px;color:var(--text-2);margin-top:8px;max-width:620px;}
.rel-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--panel);
  border:1px solid var(--line);
  border-top:2px solid rgba(18,199,214,.55);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--line-strong);}
.rel-thumb{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--panel-2);
}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.rel-thumb::after{
  content:"";position:absolute;inset:0;
  background:rgba(18,199,214,.10);
}
.rel-card:hover .rel-thumb img{transform:scale(1.05);}
.rel-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.rel-body h3{font-size:17px;line-height:1.5;color:#EAF2FA;transition:color .2s ease;}
.rel-card:hover .rel-body h3{color:var(--brand-soft);}
.rel-body p{font-size:14px;color:var(--text-2);line-height:1.7;}
.rel-body .rel-more{
  margin-top:auto;padding-top:10px;
  font-size:13.5px;font-weight:600;color:var(--brand-soft);
  display:inline-flex;align-items:center;gap:7px;
}
.rel-body .rel-more i{transition:transform .2s ease;}
.rel-card:hover .rel-more i{transform:translateX(4px);}

/* ---------- CTA ---------- */
.cta-band{padding:70px 0 84px;}
.cta-inner{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  flex-wrap:wrap;
  padding:34px 38px;
  border-radius:var(--r-lg);
  background:
    linear-gradient(120deg,rgba(18,199,214,.16) 0%,rgba(18,199,214,.04) 46%,rgba(255,106,43,.12) 100%),
    var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.cta-inner::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--brand),var(--accent));
}
.cta-copy{max-width:640px;position:relative;z-index:2;}
.cta-copy h2{font-size:clamp(21px,2.5vw,28px);color:#F4F8FD;}
.cta-copy p{margin-top:10px;font-size:15px;color:var(--text-2);}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2;}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:20px;
  border-top:1px solid var(--line);
  background:rgba(8,13,24,.9);
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.15fr;
  gap:36px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.8;max-width:330px;}
.footer-col h4{
  font-size:14.5px;color:#EAF2FA;margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{font-size:14px;color:var(--text-2);transition:color .2s ease,padding-left .2s ease;}
.footer-col ul a:hover{color:var(--brand-soft);padding-left:4px;}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-2);align-items:flex-start;line-height:1.7;}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:44px;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .num{font-variant-numeric:tabular-nums;letter-spacing:.04em;}

/* ---------- Modal ---------- */
.modal-content.lead-modal{
  background:rgba(20,30,48,.86);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-lg);
  color:var(--text);
  box-shadow:var(--sh-2);
  overflow:hidden;
}
.modal-content.lead-modal::before{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.45),transparent);
}
.lead-modal .modal-header{
  border-bottom:1px solid var(--line);
  padding:20px 24px;
}
.lead-modal .modal-title{font-size:18px;font-weight:800;color:#F4F8FD;}
.lead-modal .modal-body{padding:22px 24px 8px;}
.btn-close-custom{
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);
  background:transparent;color:var(--text-2);
  display:grid;place-items:center;font-size:14px;cursor:pointer;
  transition:.2s ease;
}
.btn-close-custom:hover{color:var(--text);border-color:var(--line-strong);background:rgba(18,199,214,.10);}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:8px;}
.field .form-control,.field .form-select{
  width:100%;background:#0E1524;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  color:var(--text);
  font-size:15px;
  padding:11px 14px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field .form-control::placeholder{color:var(--text-3);}
.field .form-control:focus,.field .form-select:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(18,199,214,.16);
  background:#0E1524;color:var(--text);
}
.field .form-select option{background:#0E1524;color:var(--text);}
.consent{
  display:flex;gap:10px;align-items:flex-start;
  font-size:12.5px;color:var(--text-3);line-height:1.7;
  margin:4px 0 18px;
}
.consent input{margin-top:4px;accent-color:var(--brand);}
.lead-modal .modal-footer-note{
  padding:14px 24px 20px;
  font-size:12px;color:var(--text-3);
  border-top:1px solid var(--line);
  line-height:1.7;
}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr;gap:30px;}
  .footer-col.footer-contact-col{grid-column:span 1;}
}
@media (max-width:991.98px){
  .nav-toggle{display:grid;place-items:center;}
  .nav-wrap{
    position:fixed;top:0;right:0;
    height:100vh;width:min(320px,86vw);
    background:var(--panel);
    border-left:1px solid var(--line);
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:84px 20px 28px;
    transform:translateX(100%);
    transition:transform .3s ease;
    z-index:1200;
    overflow-y:auto;
    box-shadow:-20px 0 44px -30px rgba(0,0,0,.9);
  }
  .nav-wrap.open{transform:translateX(0);}
  .nav-menu{flex-direction:column;align-items:stretch;gap:2px;width:100%;}
  .nav-menu a{padding:13px 14px;border-radius:10px;white-space:normal;font-size:15px;}
  .nav-menu a.active::after{left:14px;right:14px;bottom:6px;}
  .nav-cta{margin-top:12px;justify-content:center;padding:13px 18px;}
  .rel-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-desc{max-width:none;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .article-body{padding:40px 0 12px;}
  .article-hero{padding:26px 0 34px;}
  .hero-meta{gap:8px 16px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .rel-grid{grid-template-columns:1fr;}
  .cta-inner{padding:26px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-main,.cta-actions .btn-ghost{flex:1 1 160px;}
  .related{padding:48px 0 6px;}
  .cta-band{padding:52px 0 64px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cms-content{font-size:16px;}
  .cms-content h2{margin-top:34px;}
}
@media (max-width:575.98px){
  .container,.container-narrow{padding-left:18px;padding-right:18px;}
  .nav-inner{padding:0 18px;}
  .brand-text{font-size:15.5px;}
  .site-footer{padding-top:44px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .hero-tagline{font-size:12px;}
  .article-hero h1{font-size:25px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --cyan:#12C7D6;
  --cyan-deep:#0A8C99;
  --cyan-light:#7FE6F0;
  --orange:#FF6A2B;
  --bg:#060A14;
  --panel:#0E1524;
  --panel-2:#131C2E;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(18,199,214,.35);
  --text:#E9EFF7;
  --text-2:#9AABC2;
  --text-3:#6C7E96;
  --ok:#2FBF8F;
  --warn:#FFB020;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:18px;
  --sh-1:0 14px 32px -20px rgba(0,0,0,.65);
  --sh-2:0 22px 44px -22px rgba(0,0,0,.75);
  --glow:0 10px 30px -10px rgba(255,106,43,.55);
  --container:1240px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(ellipse 120% 60% at 50% -10%, rgba(18,199,214,.055) 0%, rgba(18,199,214,0) 62%),
    radial-gradient(circle at 50% 4%, rgba(18,199,214,.05) 0 22%, rgba(18,199,214,0) 23%),
    radial-gradient(circle at 50% 4%, rgba(18,199,214,.04) 0 38%, rgba(18,199,214,0) 39%),
    radial-gradient(circle at 50% 4%, rgba(18,199,214,.03) 0 54%, rgba(18,199,214,0) 55%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(rgba(233,239,247,.04) 1px, transparent 1px);
  background-size:24px 24px;
}
img{max-width:100%;display:block;}
a{color:var(--cyan);text-decoration:none;transition:color .22s ease;}
a:hover{color:var(--cyan-light);}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.22;color:var(--text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:2;}

/* ---------- Buttons ---------- */
.btn-main,.btn-ghost,.btn-link{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:700;font-size:15px;
  cursor:pointer;border:1px solid transparent;
  transition:all .22s ease;
}
.btn-main{
  background:var(--orange);color:#12100C;
  padding:13px 26px;border-radius:var(--r-btn);
  box-shadow:var(--glow);
}
.btn-main:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 14px 34px -10px rgba(255,106,43,.7);color:#12100C;}
.btn-main:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--cyan);
  border-color:rgba(18,199,214,.45);
  padding:12px 24px;border-radius:var(--r-btn);
}
.btn-ghost:hover{background:rgba(18,199,214,.12);color:var(--cyan-light);border-color:var(--cyan);}
.btn-link{
  background:none;border:none;padding:0;color:var(--cyan);
  font-weight:600;font-size:15px;
}
.btn-link i{transition:transform .22s ease;}
.btn-link:hover{color:var(--cyan-light);}
.btn-link:hover i{transform:translateX(4px);}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,10,20,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,border-color .25s ease;
}
.site-header::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.16),rgba(255,255,255,0));
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex-shrink:0;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,var(--cyan),var(--cyan-deep));
  color:#04141A;font-size:15px;
  box-shadow:0 8px 20px -12px rgba(18,199,214,.9);
}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.nav-toggle{
  display:none;background:transparent;border:1px solid var(--line);
  color:var(--text);width:40px;height:40px;border-radius:10px;cursor:pointer;
}
.nav-wrap{display:flex;align-items:center;gap:26px;}
.nav-menu{display:flex;align-items:center;gap:22px;}
.nav-menu>li>a{
  position:relative;display:inline-block;
  font-size:14.5px;font-weight:600;color:var(--text-2);
  padding:20px 0;white-space:nowrap;
}
.nav-menu>li>a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--cyan);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.nav-menu>li>a:hover{color:var(--text);}
.nav-menu>li>a:hover::after{transform:scaleX(1);}
.nav-menu>li>a.active{color:var(--cyan-light);}
.nav-menu>li>a.active::after{transform:scaleX(1);}
.nav-cta{
  display:inline-flex;align-items:center;gap:7px;
  font-size:14px;font-weight:700;color:var(--cyan);
  border:1px solid rgba(18,199,214,.45);
  padding:9px 18px;border-radius:var(--r-btn);
  transition:all .22s ease;
}
.nav-cta:hover{background:rgba(18,199,214,.12);color:var(--cyan-light);border-color:var(--cyan);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:52px 0 56px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.30;
}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(6,10,20,.96) 0%,rgba(6,10,20,.78) 52%,rgba(6,10,20,.52) 100%),
    linear-gradient(180deg,rgba(6,10,20,.35),rgba(6,10,20,.92));
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:18px;
}
.breadcrumb-line a{color:var(--text-3);}
.breadcrumb-line a:hover{color:var(--cyan);}
.breadcrumb-line i{font-size:10px;opacity:.7;}
.breadcrumb-line .current{color:var(--text-2);}
.brand-chip{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--cyan-light);
  background:rgba(18,199,214,.10);
  border:1px solid rgba(18,199,214,.30);
  padding:6px 14px;border-radius:999px;
  margin-bottom:18px;letter-spacing:.02em;
}
.page-hero h1{
  font-size:clamp(28px,4vw,46px);
  max-width:860px;
}
.page-hero .hero-sub{
  margin-top:16px;max-width:760px;
  font-size:16.5px;color:var(--text-2);
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:12px 32px;
  margin-top:26px;padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-fact{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-2);}
.hero-fact i{color:var(--cyan);font-size:14px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

/* ---------- Section ---------- */
.section{padding:88px 0;position:relative;z-index:2;}
.section-alt{background:linear-gradient(180deg,rgba(19,28,46,.55),rgba(6,10,20,0));}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--cyan);text-transform:uppercase;margin-bottom:12px;
}
.section-head .kicker::before{content:"";width:18px;height:2px;background:var(--cyan);border-radius:2px;}
.section-head h2{font-size:clamp(24px,3vw,36px);}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px;}

/* ---------- Timeline ---------- */
.timeline{position:relative;padding-left:36px;}
.timeline::before{
  content:"";position:absolute;left:11px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,rgba(18,199,214,.75),rgba(18,199,214,.12));
  border-radius:2px;
}
.tl-item{position:relative;padding:0 0 34px 0;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-31px;top:8px;
  width:12px;height:12px;border-radius:50%;
  background:var(--bg);border:2px solid var(--cyan);
  box-shadow:0 0 0 4px rgba(18,199,214,.14);
}
.tl-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-left:2px solid var(--cyan);
  border-radius:var(--r-card);
  padding:22px 24px;
  box-shadow:var(--sh-1);
  transition:all .22s ease;
}
.tl-card:hover{transform:translateY(-3px);border-color:var(--line-hover);border-left-color:var(--cyan-light);box-shadow:var(--sh-2);}
.tl-no{
  font-size:26px;font-weight:800;color:rgba(18,199,214,.55);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
  line-height:1;
}
.tl-card h3{font-size:20px;margin:10px 0 8px;}
.tl-card p{color:var(--text-2);font-size:15.5px;max-width:820px;}
.tl-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;
}
.tl-meta span{
  font-size:12.5px;color:var(--text-3);
  border:1px solid var(--line);border-radius:999px;
  padding:3px 12px;
}

/* ---------- Course cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.course-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-top:2px solid var(--cyan);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:all .22s ease;
  display:flex;flex-direction:column;
}
.course-card:hover{transform:translateY(-3px);border-color:var(--line-hover);border-top-color:var(--cyan-light);box-shadow:var(--sh-2);}
.course-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;border-radius:0;}
.course-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.course-thumb::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);}
.course-card:hover .course-thumb img{transform:scale(1.04);}
.course-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:700;color:var(--cyan-light);
  background:rgba(18,199,214,.12);
  border:1px solid rgba(18,199,214,.28);
  padding:3px 11px;border-radius:999px;
  margin-bottom:12px;width:fit-content;
}
.course-body h3{font-size:20px;margin-bottom:10px;}
.course-body p{color:var(--text-2);font-size:14.8px;}
.course-list{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.course-list li{display:flex;gap:9px;font-size:14px;color:var(--text-2);}
.course-list li i{color:var(--cyan);font-size:12px;margin-top:7px;}
.course-foot{margin-top:auto;padding-top:18px;}
.course-foot .btn-link{font-size:14px;}

/* ---------- Guarantee split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.split-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  aspect-ratio:4/3;border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-media::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);}
.check-list{display:flex;flex-direction:column;gap:18px;margin-top:26px;}
.check-item{display:flex;gap:14px;}
.check-icon{
  flex:0 0 38px;width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  background:rgba(18,199,214,.12);
  border:1px solid rgba(18,199,214,.28);
  color:var(--cyan);font-size:14px;
}
.check-item h4{font-size:17px;margin-bottom:5px;}
.check-item p{color:var(--text-2);font-size:14.8px;}

/* ---------- Stat strip ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.stat-cell{padding:26px 24px;border-right:1px solid var(--line);}
.stat-cell:last-child{border-right:none;}
.stat-num{
  font-size:clamp(26px,2.6vw,36px);font-weight:800;color:var(--cyan-light);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.stat-num small{font-size:14px;font-weight:600;color:var(--text-3);margin-left:4px;}
.stat-cell p{margin-top:8px;font-size:13.5px;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 4px;text-align:left;
  font-size:17px;font-weight:700;color:var(--text);
  transition:color .22s ease;
}
.faq-q:hover{color:var(--cyan-light);}
.faq-q .faq-sign{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;font-size:13px;
  border:1px solid var(--line);color:var(--cyan);
  transition:all .25s ease;
}
.faq-item.open .faq-q{color:var(--cyan-light);}
.faq-item.open .faq-sign{transform:rotate(45deg);background:rgba(18,199,214,.14);border-color:rgba(18,199,214,.45);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease,padding .3s ease;
  border-left:3px solid transparent;
}
.faq-item.open .faq-a{
  max-height:420px;padding:0 0 22px 20px;
  border-left:3px solid var(--cyan);
}
.faq-a p{color:var(--text-2);font-size:15px;max-width:860px;}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:40px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh-1);
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,199,214,.16),rgba(18,199,214,0) 70%);
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);position:relative;}
.cta-band p{margin-top:10px;color:var(--text-2);font-size:15.5px;max-width:640px;position:relative;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2;}
.privacy-note{
  display:flex;align-items:center;gap:9px;
  margin-top:18px;font-size:12px;color:var(--text-3);
}
.privacy-note i{color:var(--text-3);font-size:12px;}

/* ---------- Modal ---------- */
.modal-content{
  background:rgba(20,30,48,.88);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-modal);
  color:var(--text);
  position:relative;
}
.modal-content::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;border-radius:var(--r-modal) var(--r-modal) 0 0;
  background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.22),rgba(255,255,255,0));
}
.modal-header{border-bottom:1px solid var(--line);padding:22px 26px;}
.modal-title{font-size:20px;font-weight:800;}
.modal-body{padding:24px 26px 26px;}
.modal-close{
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--text-2);
  display:grid;place-items:center;cursor:pointer;transition:all .22s ease;
}
.modal-close:hover{color:var(--cyan);border-color:var(--line-hover);}
.modal-backdrop.show{opacity:.7;background:#060A14;}
.form-label{font-size:13.5px;color:var(--text-2);font-weight:600;margin-bottom:7px;}
.form-control,.form-select{
  background:#0E1524;border:1px solid var(--line);
  color:var(--text);border-radius:var(--r-btn);
  padding:11px 14px;font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-control::placeholder{color:var(--text-3);}
.form-control:focus,.form-select:focus{
  background:#0E1524;color:var(--text);
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(18,199,214,.14);
  outline:none;
}
.form-check-input{background-color:#0E1524;border-color:var(--line);}
.form-check-input:checked{background-color:var(--cyan);border-color:var(--cyan);}
.form-check-label{font-size:12.5px;color:var(--text-3);}
.form-hint{font-size:12px;color:var(--text-3);margin-top:12px;}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(14,21,36,.4),rgba(6,10,20,.9));
  padding:64px 0 0;
  margin-top:88px;
  position:relative;z-index:2;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-desc{color:var(--text-3);font-size:14px;max-width:340px;line-height:1.8;}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text);}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{font-size:14px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--cyan);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-2);align-items:flex-start;}
.footer-contact i{color:var(--cyan);font-size:13px;margin-top:6px;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--text-3);
}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .nav-menu{gap:16px;}
  .nav-menu>li>a{font-size:13.5px;}
  .nav-wrap{gap:18px;}
}
@media (max-width:991px){
  .nav-toggle{display:grid;place-items:center;}
  .nav-wrap{
    position:fixed;top:0;right:0;bottom:0;
    width:290px;max-width:84vw;
    background:var(--panel);
    border-left:1px solid var(--line);
    flex-direction:column;align-items:flex-start;justify-content:flex-start;
    gap:0;padding:80px 24px 32px;
    transform:translateX(102%);
    transition:transform .3s ease;
    z-index:1050;overflow-y:auto;
  }
  .nav-wrap.open{transform:translateX(0);}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;width:100%;}
  .nav-menu>li>a{padding:14px 0;font-size:15px;border-bottom:1px solid var(--line);display:block;}
  .nav-menu>li>a::after{display:none;}
  .nav-menu>li>a.active{color:var(--cyan-light);}
  .nav-cta{margin-top:22px;justify-content:center;width:100%;padding:12px 18px;}
  .nav-mask{
    position:fixed;inset:0;background:rgba(6,10,20,.7);
    opacity:0;visibility:hidden;transition:opacity .3s ease;z-index:1040;
  }
  .nav-mask.show{opacity:1;visibility:visible;}
  .split{grid-template-columns:1fr;gap:32px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-cell:nth-child(2){border-right:none;}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:64px 0;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .page-hero{padding:36px 0 42px;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:30px;}
  .card-grid{grid-template-columns:1fr;}
  .timeline{padding-left:28px;}
  .timeline::before{left:7px;}
  .tl-item::before{left:-27px;}
  .stat-cell{padding:20px 18px;}
  .faq-q{font-size:15.5px;padding:18px 2px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .site-footer{padding-top:48px;margin-top:52px;}
  .cta-band{padding:26px 20px;}
  .site-footer{padding-top:48px;}
  .split-media{aspect-ratio:16/11;}
}
@media (max-width:519px){
  .brand-text{font-size:15px;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;justify-content:center;}
  .cta-actions{width:100%;}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%;justify-content:center;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-cell{border-right:none;border-bottom:1px solid var(--line);}
  .stat-cell:last-child{border-bottom:none;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: category2 */
:root{
  --cyan:#12C7D6;
  --cyan-deep:#0A8C99;
  --cyan-light:#7FE6F0;
  --orange:#FF6A2B;
  --bg:#060A14;
  --panel:#0E1524;
  --panel-2:#131C2E;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(18,199,214,.35);
  --text:#E9EFF7;
  --muted:#9AABC2;
  --dim:#6C7E96;
  --ok:#2FBF8F;
  --warn:#FFB020;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-modal:18px;
  --sh-1:0 14px 32px -20px rgba(0,0,0,.65);
  --sh-2:0 22px 44px -22px rgba(0,0,0,.75);
  --sh-glow:0 10px 30px -10px rgba(255,106,43,.55);
  --maxw:1240px;
  --sec:88px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0 0 auto 0;
  height:66vh;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(120% 70% at 50% -18%, rgba(18,199,214,.16) 0%, rgba(18,199,214,.05) 36%, rgba(6,10,20,0) 68%),
    radial-gradient(88% 52% at 50% -8%, rgba(18,199,214,.10) 0%, rgba(18,199,214,0) 62%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:24px 24px;
  opacity:.35;
}
img{max-width:100%;display:block;}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--cyan-light);}
h1,h2,h3,h4,h5{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--text);line-height:1.24;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;position:relative;z-index:2;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
::selection{background:rgba(18,199,214,.35);color:#fff;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:#04070F;
  border-bottom:1px solid var(--line);
  font-size:12.5px;
  letter-spacing:.02em;
  color:var(--dim);
  position:relative;
  z-index:60;
}
.topbar-inner{
  min-height:36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.topbar-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.topbar-left .dot{width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px rgba(18,199,214,.9);}
.topbar-left .sep{color:rgba(255,255,255,.14);}
.topbar-btn{
  display:inline-flex;align-items:center;gap:6px;
  border:1px solid var(--line-hover);
  color:var(--cyan-light);
  padding:3px 12px;
  border-radius:999px;
  font-size:12px;
  background:rgba(18,199,214,.07);
  transition:all .22s ease;
}
.topbar-btn:hover{background:rgba(18,199,214,.16);color:#fff;}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(6,10,20,.86);
  border-bottom:1px solid var(--line);
  transition:background .25s ease, box-shadow .25s ease, backdrop-filter .25s ease;
}
.site-header.scrolled{
  background:rgba(20,30,48,.55);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:rgba(255,255,255,.10);
  box-shadow:0 12px 30px -24px rgba(0,0,0,.9);
}
.nav-inner{
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  width:32px;height:32px;border-radius:9px;flex:0 0 32px;
  display:grid;place-items:center;
  background:linear-gradient(150deg,var(--cyan) 0%,var(--cyan-deep) 100%);
  color:#04141A;font-size:14px;
  box-shadow:0 8px 20px -12px rgba(18,199,214,.9);
}
.brand-text{font-weight:800;font-size:17px;letter-spacing:-.01em;}
.nav-wrap{display:flex;align-items:center;gap:8px;}
.nav-menu{display:flex;align-items:center;gap:2px;}
.nav-menu > li > a{
  display:block;
  padding:9px 12px;
  color:var(--muted);
  font-size:14.5px;
  border-radius:8px;
  position:relative;
  transition:color .2s ease,background .2s ease;
}
.nav-menu > li > a:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-menu > li > a.active{color:var(--cyan-light);}
.nav-menu > li > a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;
  background:var(--cyan);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:7px;
  margin-left:8px;
  padding:9px 16px;
  border-radius:var(--r-btn);
  background:var(--orange);
  color:#160A03;
  font-weight:700;
  font-size:14px;
  box-shadow:var(--sh-glow);
  transition:transform .2s ease,filter .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{color:#160A03;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 14px 34px -10px rgba(255,106,43,.7);}
.nav-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;
  width:42px;height:42px;border-radius:10px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  color:var(--text);font-size:16px;
}
.nav-mask{
  position:fixed;inset:0;background:rgba(6,10,20,.7);
  opacity:0;visibility:hidden;transition:all .25s ease;z-index:70;
}
.nav-mask.show{opacity:1;visibility:visible;}

/* ---------- 面包屑 ---------- */
.crumb{padding:22px 0 6px;position:relative;z-index:2;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--dim);}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li:not(:last-child)::after{content:"›";color:rgba(255,255,255,.2);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--cyan-light);}
.crumb .cur{color:var(--cyan-light);}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec) 0;position:relative;z-index:2;}
.section.tight{padding:52px 0;}
.sec-head{margin-bottom:34px;max-width:840px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan-light);
  padding:5px 12px;border-radius:999px;
  border:1px solid rgba(18,199,214,.28);
  background:rgba(18,199,214,.07);
  margin-bottom:16px;
}
.sec-head h2{font-size:clamp(24px,3vw,36px);}
.sec-head .lead{margin-top:14px;color:var(--muted);font-size:15.5px;max-width:720px;}
.hairline{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 分类页 Hero ---------- */
.page-hero{padding:26px 0 20px;position:relative;z-index:2;}
.page-hero .hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:44px;
  align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--cyan-light);
  padding:5px 13px;border-radius:999px;
  border:1px solid rgba(18,199,214,.28);
  background:rgba(18,199,214,.07);
  margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.22;
  margin-bottom:16px;
}
.page-hero h1 span{color:var(--cyan-light);}
.hero-sub{color:var(--muted);font-size:16px;max-width:600px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px;}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);border:0;
  background:var(--orange);color:#160A03;font-weight:700;font-size:15px;
  box-shadow:var(--sh-glow);
  transition:transform .2s ease,filter .2s ease,box-shadow .2s ease;
}
.btn-main:hover{color:#160A03;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 16px 38px -12px rgba(255,106,43,.72);}
.btn-main:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);
  background:transparent;border:1px solid rgba(18,199,214,.4);
  color:var(--cyan-light);font-weight:700;font-size:15px;
  transition:all .2s ease;
}
.btn-ghost:hover{background:rgba(18,199,214,.12);color:#fff;border-color:var(--cyan);}
.trust-row{display:flex;flex-wrap:wrap;gap:20px;font-size:13px;color:var(--muted);}
.trust-row span{display:inline-flex;align-items:center;gap:8px;}
.trust-row i{color:var(--cyan);}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  min-height:300px;box-shadow:var(--sh-1);
  border:1px solid var(--line);
}
.hero-media img{width:100%;height:100%;min-height:300px;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(18,199,214,.10) 0%,rgba(6,10,20,.55) 100%);
}
.hero-media .badge-float{
  position:absolute;left:18px;bottom:18px;right:18px;
  display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:12px;
  background:rgba(20,30,48,.55);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  font-size:13px;color:var(--muted);
  z-index:2;
}
.hero-media .badge-float strong{color:var(--text);font-size:14px;}

/* ---------- 双列布局 ---------- */
.layout-two{
  display:grid;
  grid-template-columns:minmax(0,1fr) 360px;
  gap:44px;
  align-items:start;
}
.content-flow > * + *{margin-top:34px;}
.blk{
  background:var(--panel);
  border:1px solid var(--line);
  border-left:2px solid rgba(18,199,214,.5);
  border-radius:var(--r-card);
  padding:30px 30px 26px;
  box-shadow:var(--sh-1);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.blk:hover{border-color:var(--line-hover);border-left-color:var(--cyan);}
.blk h3{font-size:20px;margin-bottom:12px;}
.blk h3 .idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:8px;margin-right:10px;
  background:rgba(18,199,214,.12);color:var(--cyan-light);
  font-size:13px;font-weight:800;vertical-align:2px;
}
.blk p{color:var(--muted);font-size:15.5px;}
.blk p:last-child{margin-bottom:0;}

.type-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:18px;}
.type-card{
  background:var(--panel-2);
  border:1px solid var(--line);
  border-top:2px solid rgba(18,199,214,.45);
  border-radius:14px;
  padding:18px 18px 16px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.type-card:hover{transform:translateY(-3px);border-color:var(--line-hover);box-shadow:var(--sh-2);}
.type-card h4{font-size:16.5px;margin-bottom:8px;}
.type-card p{font-size:14px;color:var(--muted);margin:0;}
.type-card .tagline{
  display:inline-block;margin-bottom:10px;font-size:12px;color:var(--cyan-light);
  border:1px solid rgba(18,199,214,.3);border-radius:999px;padding:2px 10px;
  background:rgba(18,199,214,.07);
}

.step-list{margin-top:18px;border-left:1px solid rgba(18,199,214,.28);padding-left:22px;}
.step-list li{position:relative;padding-bottom:20px;}
.step-list li:last-child{padding-bottom:0;}
.step-list li::before{
  content:"";position:absolute;left:-28px;top:8px;
  width:11px;height:11px;border-radius:50%;
  background:var(--bg);border:2px solid var(--cyan);
}
.step-list .st-title{font-weight:700;font-size:16px;color:var(--text);display:flex;gap:10px;align-items:baseline;}
.step-list .st-title em{font-style:normal;color:var(--cyan);font-size:13px;}
.step-list p{font-size:14.5px;color:var(--muted);margin:6px 0 0;}

.check-list{margin-top:16px;display:grid;gap:12px;}
.check-list li{display:flex;gap:11px;font-size:15px;color:var(--muted);align-items:flex-start;}
.check-list li::before{
  content:"✓";flex:0 0 20px;height:20px;border-radius:6px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(47,191,143,.14);color:var(--ok);
  font-size:12px;font-weight:900;margin-top:4px;
}
.check-list li strong{color:var(--text);font-weight:700;}

.figure-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px;}
.figure-row figure{margin:0;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);position:relative;}
.figure-row img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.figure-row figure::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);}
.figure-row figcaption{font-size:12.5px;color:var(--dim);margin-top:8px;text-align:center;}

/* ---------- 侧栏 ---------- */
.side-col{display:grid;gap:20px;position:sticky;top:88px;}
.side-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px 22px;
  box-shadow:var(--sh-1);
}
.side-card h3{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:9px;}
.side-card h3 i{color:var(--cyan);font-size:15px;}
.side-card p{font-size:14px;color:var(--muted);margin-bottom:0;}
.side-stats{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border-radius:12px;overflow:hidden;margin-top:4px;}
.side-stats div{background:var(--panel-2);padding:16px 12px;text-align:center;}
.side-stats .v{font-size:clamp(20px,2.4vw,26px);font-weight:800;color:var(--cyan-light);line-height:1.1;}
.side-stats .k{font-size:12.5px;color:var(--dim);margin-top:6px;}
.side-links{display:grid;gap:2px;margin-top:2px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 12px;border-radius:10px;font-size:14.5px;color:var(--muted);
  border:1px solid transparent;
  transition:all .2s ease;
}
.side-links a:hover{background:rgba(18,199,214,.09);color:var(--cyan-light);border-color:rgba(18,199,214,.22);}
.side-links a i{font-size:12px;color:var(--dim);}
.side-links a:hover i{color:var(--cyan);}
.side-cta{
  display:block;text-align:center;
  padding:12px 16px;border-radius:var(--r-btn);
  background:rgba(18,199,214,.12);
  border:1px solid rgba(18,199,214,.34);
  color:var(--cyan-light);font-weight:700;font-size:14.5px;
  margin-top:14px;transition:all .2s ease;
}
.side-cta:hover{background:rgba(18,199,214,.2);color:#fff;}

/* ---------- FAQ ---------- */
.faq-wrap{margin-top:22px;}
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.faq-acc .accordion-item:first-child{border-top:1px solid var(--line);}
.faq-acc .accordion-button{
  background:transparent;color:var(--text);
  font-size:16.5px;font-weight:700;
  padding:20px 18px 20px 18px;
  box-shadow:none;border-radius:0;
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--cyan-light);
  background:rgba(18,199,214,.05);
  box-shadow:inset 3px 0 0 var(--cyan);
}
.faq-acc .accordion-button::after{
  content:"+";background-image:none;
  width:auto;height:auto;transform:none;
  display:flex;align-items:center;justify-content:center;
  color:var(--cyan);font-size:19px;font-weight:700;line-height:1;
  margin-left:16px;
}
.faq-acc .accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.faq-acc .accordion-button:focus{box-shadow:inset 3px 0 0 var(--cyan);}
.faq-acc .accordion-body{padding:0 18px 22px;color:var(--muted);font-size:15px;}

/* ---------- CTA 条 ---------- */
.cta-bar{
  background:linear-gradient(120deg,rgba(18,199,214,.12) 0%,rgba(255,106,43,.10) 100%),var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:34px 34px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--sh-1);
}
.cta-bar h3{font-size:clamp(20px,2.4vw,26px);margin-bottom:8px;}
.cta-bar p{color:var(--muted);font-size:15px;margin:0;max-width:620px;}
.cta-bar .cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto;}
.privacy-note{
  display:flex;align-items:flex-start;gap:10px;
  margin-top:16px;font-size:12px;color:var(--dim);line-height:1.7;
}
.privacy-note input{margin-top:4px;accent-color:var(--cyan);}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:20px;
  border-top:1px solid var(--line);
  background:#04070F;
  padding:60px 0 0;
  position:relative;z-index:2;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px;}
.footer-desc{font-size:14px;color:var(--dim);margin-top:16px;max-width:340px;line-height:1.8;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--muted);}
.footer-col ul a:hover{color:var(--cyan-light);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--muted);line-height:1.7;}
.footer-contact i{color:var(--cyan);margin-top:5px;font-size:13px;flex:0 0 14px;}
.footer-bottom{
  margin-top:48px;padding:20px 0;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:var(--dim);flex-wrap:wrap;
}

/* ---------- 模态 ---------- */
.modal-content{
  background:rgba(20,30,48,.72);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-top:1px solid rgba(127,230,240,.28);
  border-radius:var(--r-modal);
  color:var(--text);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.9);
}
.modal-header{border-bottom:1px solid var(--line);padding:20px 24px;}
.modal-title{font-size:19px;font-weight:800;}
.modal-body{padding:22px 24px 26px;}
.modal-close{
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--muted);
  display:grid;place-items:center;font-size:13px;
  transition:all .2s ease;
}
.modal-close:hover{color:var(--text);border-color:var(--line-hover);}
.lead-form .form-label{font-size:13.5px;color:var(--muted);margin-bottom:7px;}
.form-control,.form-select{
  background:var(--panel);border:1px solid var(--line);color:var(--text);
  border-radius:10px;padding:11px 14px;font-size:14.5px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-control::placeholder{color:var(--dim);}
.form-control:focus,.form-select:focus{
  background:var(--panel);color:var(--text);
  border-color:var(--cyan);box-shadow:0 0 0 3px rgba(18,199,214,.16);
}
.btn-submit{
  width:100%;border:0;border-radius:var(--r-btn);
  padding:13px 20px;font-weight:700;font-size:15px;
  background:var(--orange);color:#160A03;box-shadow:var(--sh-glow);
  transition:transform .2s ease,filter .2s ease;
}
.btn-submit:hover{filter:brightness(1.08);transform:translateY(-1px);color:#160A03;}
.form-tip{font-size:12px;color:var(--dim);margin-top:12px;}
.form-ok{display:none;font-size:13.5px;color:var(--ok);margin-top:14px;}
.form-ok.show{display:block;}

/* ---------- 滚动淡入 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .3s ease,transform .3s ease;}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--sec:64px;}
  .layout-two{grid-template-columns:minmax(0,1fr) 320px;gap:32px;}
  .page-hero .hero-grid{gap:32px;}
}
@media (max-width:991px){
  .nav-toggle{display:grid;place-items:center;}
  .nav-wrap{
    position:fixed;top:0;right:0;bottom:0;width:300px;max-width:88vw;
    background:var(--panel);border-left:1px solid var(--line);
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    padding:76px 20px 28px;gap:6px;
    transform:translateX(105%);transition:transform .28s ease;
    z-index:80;overflow-y:auto;
  }
  .nav-wrap.open{transform:translateX(0);}
  .nav-menu{flex-direction:column;align-items:stretch;gap:2px;}
  .nav-menu > li > a{padding:13px 12px;font-size:15.5px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav-menu > li > a.active::after{left:0;right:auto;width:3px;height:20px;bottom:auto;top:50%;transform:translateY(-50%);}
  .nav-cta{margin:16px 0 0;justify-content:center;}
  .layout-two{grid-template-columns:minmax(0,1fr);}
  .side-col{position:static;}
  .page-hero .hero-grid{grid-template-columns:minmax(0,1fr);}
  .hero-media{min-height:240px;}
  .hero-media img{min-height:240px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .cta-bar{flex-direction:column;align-items:flex-start;}
  .cta-bar .cta-actions{width:100%;}
}
@media (max-width:767px){
  :root{--sec:52px;}
  body{font-size:16px;}
  .topbar-left .hide-sm{display:none;}
  .page-hero h1{font-size:clamp(26px,7vw,34px);}
  .type-grid{grid-template-columns:minmax(0,1fr);}
  .figure-row{grid-template-columns:minmax(0,1fr);}
  .blk{padding:24px 20px 22px;}
  .cta-bar{padding:26px 22px;}
  .hero-actions{width:100%;}
  .btn-main,.btn-ghost{flex:1 1 auto;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .side-stats .v{font-size:22px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .trust-row{gap:12px;font-size:12.5px;}
  .brand-text{font-size:15.5px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category5 */
/* ============ 设计变量 ============ */
:root{
  --cyan:#12C7D6;
  --cyan-deep:#0A8C99;
  --cyan-light:#7FE6F0;
  --orange:#FF6A2B;
  --bg:#060A14;
  --panel:#0E1524;
  --panel-2:#131C2E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(18,199,214,.35);
  --text:#E9EFF7;
  --text-2:#9AABC2;
  --text-3:#6C7E96;
  --ok:#2FBF8F;
  --warn:#FFB020;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 14px 32px -20px rgba(0,0,0,.65);
  --sh-2:0 22px 44px -22px rgba(0,0,0,.75);
  --glow:0 10px 30px -10px rgba(255,106,43,.55);
  --ease:220ms cubic-bezier(.4,0,.2,1);
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--bg);
  background-image:
    radial-gradient(120% 55% at 50% -6%, rgba(18,199,214,.14), transparent 62%),
    radial-gradient(96% 46% at 50% 3%, rgba(18,199,214,.07), transparent 68%),
    radial-gradient(rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:auto, auto, 24px 24px;
  background-repeat:no-repeat, no-repeat, repeat;
  background-attachment:fixed;
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--cyan-light)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.24;color:var(--text)}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px}

/* ============ 容器 ============ */
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}

/* ============ 顶部信息条 ============ */
.top-bar{
  background:rgba(9,14,26,.92);
  border-bottom:1px solid var(--line);
  font-size:13px;
  position:relative;
  z-index:60;
}
.top-bar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px}
.top-bar-left{display:flex;align-items:center;gap:14px;color:var(--text-3);letter-spacing:.02em;min-width:0}
.top-domain{color:var(--text-2);font-weight:600;font-variant-numeric:tabular-nums}
.top-note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top-action{
  color:var(--text-2);
  border:1px solid var(--line);
  border-radius:8px;
  padding:3px 12px;
  font-size:12.5px;
  white-space:nowrap;
  transition:all var(--ease);
}
.top-action:hover{color:var(--cyan-light);border-color:var(--line-strong);background:rgba(18,199,214,.08)}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(6,10,20,.78);
  border-bottom:1px solid var(--line);
  transition:background var(--ease),backdrop-filter var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(20,30,48,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:0 10px 30px -22px rgba(0,0,0,.9);
}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.brand:hover{color:var(--text)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));
  color:#04161c;font-size:15px;flex:none;
  box-shadow:0 8px 20px -12px rgba(18,199,214,.9);
}
.nav-toggle{
  margin-left:auto;display:none;background:transparent;border:1px solid var(--line);
  color:var(--text);width:42px;height:40px;border-radius:10px;cursor:pointer;transition:all var(--ease);
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--cyan-light)}
.nav-wrap{display:flex;align-items:center;gap:16px;margin-left:auto}
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-menu a{
  position:relative;display:block;padding:9px 12px;border-radius:8px;
  font-size:14.5px;color:var(--text-2);white-space:nowrap;transition:color var(--ease),background var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-menu a:hover{color:var(--text);background:rgba(18,199,214,.08)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.active{color:var(--text);font-weight:600;background:rgba(18,199,214,.10)}
.nav-menu a.active::after{transform:scaleX(1)}
.nav-cta{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 18px;border-radius:var(--r-btn);font-size:14.5px;font-weight:600;
  color:var(--cyan-light);border:1px solid var(--line-strong);background:rgba(18,199,214,.06);
  transition:all var(--ease);white-space:nowrap;
}
.nav-cta:hover{color:#08161c;background:var(--cyan-light);border-color:var(--cyan-light)}
.nav-mask{
  position:fixed;inset:0;background:rgba(6,10,20,.7);opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);z-index:150;
}
.nav-mask.show{opacity:1;visibility:visible}

/* ============ 内页 Hero ============ */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);min-height:340px;display:flex;align-items:center}
.page-hero .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center}
.page-hero .hero-tint{
  position:absolute;inset:0;
  background:
    linear-gradient(90deg, rgba(6,10,20,.94) 0%, rgba(6,10,20,.78) 48%, rgba(6,10,20,.46) 100%),
    linear-gradient(180deg, rgba(6,10,20,.35), rgba(6,10,20,.9)),
    rgba(18,199,214,.10);
}
.page-hero .hero-inner{position:relative;z-index:2;padding:64px 0 60px;max-width:820px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--cyan-light)}
.crumb .sep{opacity:.5}
.crumb .now{color:var(--text-2)}
.badge-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.04em;
  color:var(--cyan-light);background:rgba(18,199,214,.10);border:1px solid var(--line-strong);
  margin-bottom:18px;
}
.page-hero h1{font-size:clamp(28px,4vw,46px);line-height:1.22;margin-bottom:18px}
.page-hero .hero-lead{font-size:16.5px;color:var(--text-2);max-width:660px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 按钮 ============ */
.btn-main{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--orange);color:#1B0A02;font-weight:700;font-size:15.5px;
  padding:13px 26px;border-radius:var(--r-btn);border:1px solid transparent;
  box-shadow:var(--glow);transition:all var(--ease);cursor:pointer;
}
.btn-main:hover{background:#ff7c44;color:#1B0A02;transform:translateY(-1px);box-shadow:0 14px 34px -10px rgba(255,106,43,.7)}
.btn-main:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:9px;
  background:transparent;color:var(--cyan-light);font-weight:600;font-size:15.5px;
  padding:13px 24px;border-radius:var(--r-btn);border:1px solid var(--line-strong);
  transition:all var(--ease);cursor:pointer;
}
.btn-ghost:hover{background:rgba(18,199,214,.14);color:#fff;border-color:var(--cyan)}
.btn-ghost:active{transform:translateY(1px)}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--cyan);
}
.link-arrow i{transition:transform var(--ease)}
.link-arrow:hover{color:var(--cyan-light)}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ 板块 ============ */
.section{padding:88px 0;position:relative}
.section--panel{background:linear-gradient(180deg,rgba(14,21,36,.75),rgba(6,10,20,0))}
.section-head{max-width:780px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3vw,36px);margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.12em;color:var(--cyan);
  text-transform:uppercase;margin-bottom:12px;font-weight:700;
}

/* ============ 对比清单 ============ */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{
  background:var(--panel);border:1px solid var(--line);border-top:2px solid var(--cyan);
  border-radius:var(--r-card);padding:32px 30px;box-shadow:var(--sh-1);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.compare-card:hover{transform:translateY(-3px);border-color:var(--line-strong);border-top-color:var(--cyan);box-shadow:var(--sh-2)}
.compare-card--pro{border-top-color:var(--orange);background:var(--panel-2)}
.compare-card--pro:hover{border-top-color:var(--orange)}
.compare-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:8px}
.compare-card h3{font-size:21px;margin-bottom:6px}
.compare-card .compare-sub{font-size:14px;color:var(--text-3);margin-bottom:22px}
.compare-badge{
  flex:none;font-size:12px;padding:4px 11px;border-radius:999px;
  color:var(--cyan-light);background:rgba(18,199,214,.12);border:1px solid var(--line-strong);
}
.compare-card--pro .compare-badge{color:#FFD8C4;background:rgba(255,106,43,.14);border-color:rgba(255,106,43,.4)}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.06);
  font-size:15.5px;color:var(--text-2);
}
.check-list li:last-child{border-bottom:0}
.check-list i{color:var(--cyan);font-size:15px;margin-top:5px;flex:none}
.check-list li.is-off{color:var(--text-3)}
.check-list li.is-off i{color:var(--text-3)}
.conclusion-bar{
  margin-top:26px;display:flex;gap:16px;align-items:flex-start;
  background:linear-gradient(90deg,rgba(18,199,214,.12),rgba(18,199,214,.02));
  border:1px solid var(--line-strong);border-left:3px solid var(--cyan);
  border-radius:12px;padding:18px 22px;color:var(--text-2);font-size:15px;
}
.conclusion-bar i{color:var(--cyan);margin-top:4px;flex:none}
.conclusion-bar strong{color:var(--text);font-weight:700}

/* ============ 图文分区 ============ */
.split{display:grid;grid-template-columns:5fr 6fr;gap:56px;align-items:center}
.figure{position:relative;border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh-1)}
.figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.figure::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);pointer-events:none}
.figure-cap{font-size:13px;color:var(--text-3);margin-top:12px;text-align:center}
.benefit-list li{
  display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);
  transition:border-color var(--ease);
}
.benefit-list li:last-child{border-bottom:0}
.benefit-list li:hover{border-color:var(--line-strong)}
.benefit-ico{
  width:42px;height:42px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:rgba(18,199,214,.10);border:1px solid var(--line);color:var(--cyan);font-size:16px;
}
.benefit-list h4{font-size:17px;margin-bottom:6px}
.benefit-list p{font-size:15px;color:var(--text-2);margin:0}

/* ============ 资讯节奏节点 ============ */
.node-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.node-card{
  background:var(--panel);border:1px solid var(--line);border-left:2px solid var(--cyan);
  border-radius:var(--r-card);padding:28px 26px;box-shadow:var(--sh-1);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.node-card:hover{transform:translateY(-3px);border-color:var(--line);border-left-color:var(--cyan-light);box-shadow:var(--sh-2)}
.node-index{
  font-size:26px;font-weight:800;color:var(--cyan);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;display:block;margin-bottom:14px;
}
.node-card h3{font-size:19px;margin-bottom:10px}
.node-card p{font-size:15px;color:var(--text-2)}

/* ============ FAQ ============ */
.faq-acc .accordion-item{background:transparent;border:0;border-top:1px solid var(--line)}
.faq-acc .accordion-item:last-child{border-bottom:1px solid var(--line)}
.faq-acc .accordion-button{
  position:relative;background:transparent;color:var(--text);font-size:17px;font-weight:600;
  padding:22px 48px 22px 20px;box-shadow:none;border-radius:0;line-height:1.5;
  display:flex;align-items:center;gap:12px;
}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--cyan);transform:scaleY(0);transform-origin:top;transition:transform var(--ease);
}
.faq-acc .accordion-button::after{display:none}
.faq-acc .accordion-button:not(.collapsed){color:var(--cyan-light);background:rgba(18,199,214,.05);box-shadow:none}
.faq-acc .accordion-button:not(.collapsed)::before{transform:scaleY(1)}
.faq-acc .accordion-button:hover{color:var(--cyan-light)}
.faq-acc .accordion-body{padding:0 20px 24px 20px;color:var(--text-2);font-size:15.5px;line-height:1.85}
.faq-sign{
  position:absolute;right:12px;top:50%;transform:translateY(-50%);
  width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);font-size:14px;transition:all var(--ease);
}
.faq-acc .accordion-button:not(.collapsed) .faq-sign{color:var(--cyan-light);border-color:var(--line-strong);background:rgba(18,199,214,.12)}

/* ============ CTA 条 ============ */
.cta-band{
  background:linear-gradient(120deg,rgba(19,28,46,.95),rgba(10,140,153,.20));
  border:1px solid var(--line);border-radius:18px;padding:44px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  box-shadow:var(--sh-1);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,199,214,.18),transparent 68%);pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;position:relative}
.cta-band p{color:var(--text-2);font-size:15.5px;max-width:620px;position:relative}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative}
.privacy-note{
  display:flex;gap:10px;align-items:flex-start;
  font-size:12px;color:var(--text-3);line-height:1.7;margin-top:18px;
}
.privacy-note i{margin-top:4px;flex:none;color:var(--text-3)}

/* ============ 模态框 ============ */
.modal-content{
  background:rgba(20,30,48,.92);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-top:1px solid rgba(255,255,255,.22);
  border-radius:18px;color:var(--text);
}
.modal-header{border-bottom:1px solid var(--line);padding:22px 26px}
.modal-title{font-size:20px;font-weight:800}
.modal-body{padding:24px 26px 26px}
.modal-footer{border-top:1px solid var(--line);padding:16px 26px}
.btn-close{
  background:transparent;opacity:1;width:34px;height:34px;border-radius:999px;
  border:1px solid var(--line);position:relative;padding:0;margin:0;transition:all var(--ease);
}
.btn-close::before{
  content:"\f00d";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;color:var(--text-2);
  position:absolute;inset:0;display:grid;place-items:center;
}
.btn-close:hover{border-color:var(--line-strong)}
.btn-close:hover::before{color:var(--cyan-light)}
.form-label{font-size:14px;color:var(--text-2);margin-bottom:7px;font-weight:600}
.form-control,.form-select{
  background:var(--panel);border:1px solid var(--line);color:var(--text);
  border-radius:var(--r-btn);padding:11px 14px;font-size:15px;transition:all var(--ease);
}
.form-control::placeholder{color:var(--text-3)}
.form-control:focus,.form-select:focus{
  background:var(--panel);color:var(--text);border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(18,199,214,.15);
}
.form-select option{background:var(--panel);color:var(--text)}
.form-check-input{
  background-color:var(--panel);border:1px solid var(--line);width:16px;height:16px;margin-top:4px;
}
.form-check-input:checked{background-color:var(--cyan);border-color:var(--cyan)}
.form-check-input:focus{box-shadow:0 0 0 3px rgba(18,199,214,.18);border-color:var(--cyan)}
.form-check-label{font-size:12.5px;color:var(--text-3);line-height:1.65}
.modal-backdrop.show{opacity:.72;background:#060A14}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:rgba(9,14,26,.72);margin-top:0;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{font-size:14.5px;color:var(--text-3);line-height:1.8;max-width:340px}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text)}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a{font-size:14.5px;color:var(--text-3)}
.footer-col ul a:hover{color:var(--cyan-light)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-3);margin-bottom:12px;line-height:1.7}
.footer-contact i{margin-top:4px;flex:none;color:var(--cyan-deep)}
.footer-bottom{
  margin-top:52px;border-top:1px solid var(--line);
  padding:20px 0 26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .split{gap:40px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-col:last-child{grid-column:span 3}
}
@media (max-width:991px){
  .container{padding-left:20px;padding-right:20px}
  .section{padding:64px 0}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-wrap{
    position:fixed;top:0;right:0;height:100vh;width:min(86vw,340px);
    flex-direction:column;align-items:stretch;gap:18px;margin:0;
    background:var(--panel);border-left:1px solid var(--line);
    padding:84px 22px 32px;overflow-y:auto;z-index:200;
    transform:translateX(105%);transition:transform 260ms cubic-bezier(.4,0,.2,1);
  }
  .nav-wrap.open{transform:translateX(0)}
  .nav-menu{flex-direction:column;align-items:stretch;gap:4px}
  .nav-menu a{padding:13px 12px;font-size:15.5px;border-radius:10px}
  .nav-menu a::after{left:0;right:auto;width:3px;top:12px;bottom:12px;height:auto;bottom:12px;transform:scaleY(0);transform-origin:top}
  .nav-menu a:hover::after,.nav-menu a.active::after{transform:scaleY(1)}
  .nav-cta{justify-content:center;padding:13px 18px;font-size:15.5px}
  .compare-grid{grid-template-columns:1fr;gap:20px}
  .split{grid-template-columns:1fr;gap:32px}
  .split .figure{order:-1}
  .node-grid{grid-template-columns:1fr;gap:18px}
  .page-hero{min-height:300px}
  .page-hero .hero-inner{padding:52px 0 48px}
  .cta-band{padding:34px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .footer-col:last-child{grid-column:span 2}
}
@media (max-width:767px){
  .top-note{display:none}
  .section{padding:56px 0}
  .page-hero .hero-inner{padding:44px 0 40px}
  .page-hero h1{font-size:clamp(24px,6.6vw,32px)}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;justify-content:center}
  .compare-card{padding:26px 22px}
  .cta-band{padding:28px 22px;border-radius:14px}
  .cta-band .cta-actions{width:100%}
  .cta-band .btn-main{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-col:last-child{grid-column:span 1}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:575px){
  .section{padding:52px 0}
  .section-head{margin-bottom:30px}
  .node-index{font-size:22px}
  .faq-acc .accordion-button{font-size:15.5px;padding:18px 44px 18px 16px}
  .modal-body,.modal-header{padding-left:18px;padding-right:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category4 */
:root{
  --brand:#12C7D6;
  --brand-deep:#0A8C99;
  --brand-light:#7FE6F0;
  --accent:#FF6A2B;
  --bg:#060A14;
  --panel:#0E1524;
  --panel-2:#131C2E;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(18,199,214,.35);
  --text:#E9EFF7;
  --text-2:#9AABC2;
  --text-3:#6C7E96;
  --ok:#2FBF8F;
  --warn:#FFB020;
  --r-card:16px;
  --r-modal:18px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 14px 32px -20px rgba(0,0,0,.65);
  --sh-2:0 22px 44px -22px rgba(0,0,0,.75);
  --sh-glow:0 10px 30px -10px rgba(255,106,43,.55);
  --container:1240px;
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(120% 58% at 50% -12%, rgba(18,199,214,.11), transparent 62%),
    radial-gradient(80% 38% at 88% 3%, rgba(18,199,214,.06), transparent 70%),
    radial-gradient(72% 34% at 10% 7%, rgba(127,230,240,.05), transparent 72%);
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(233,239,247,.4) 1px, transparent 1px);
  background-size:24px 24px;
  opacity:.04;
}

.top-strip,header,main,footer{position:relative;z-index:1}

h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.22}
h1{font-size:clamp(30px,4.4vw,52px)}
h2{font-size:clamp(24px,3vw,36px)}
h3{font-size:21px}
p{margin:0}
ul{margin:0;padding:0}
img{display:block;max-width:100%}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-light)}
button{font-family:inherit}
.num,.spec-value,.foot-domain{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}

/* ============ 顶部信息条 ============ */
.top-strip{background:#04070F;border-bottom:1px solid var(--line);font-size:12.5px;letter-spacing:.02em}
.top-strip-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.top-strip-left{display:flex;align-items:center;gap:14px;color:var(--text-3);white-space:nowrap;overflow:hidden}
.top-domain{color:var(--text-2);letter-spacing:.06em}
.top-note{color:var(--text-3);overflow:hidden;text-overflow:ellipsis}
.top-action{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:12.5px;
  padding:4px 13px;border:1px solid var(--line-hover);border-radius:999px;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.top-action:hover{background:rgba(18,199,214,.12);color:var(--brand-light);border-color:var(--brand)}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,10,20,.86);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(20,30,48,.55);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:rgba(255,255,255,.10);
  box-shadow:0 12px 32px -24px rgba(0,0,0,.95);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:17px;letter-spacing:-.01em}
.brand:hover{color:var(--text)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#04141A;font-size:15px;
  box-shadow:0 8px 20px -12px rgba(18,199,214,.9);
}
.brand-text{white-space:nowrap}
.nav-wrap{display:flex;align-items:center;gap:20px}
.nav-menu{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.nav-menu > li > a{
  display:block;padding:20px 12px;font-size:14.5px;color:var(--text-2);
  position:relative;white-space:nowrap;transition:color .2s ease;
}
.nav-menu > li > a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:13px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-menu > li > a:hover{color:var(--text)}
.nav-menu > li > a:hover::after{transform:scaleX(1)}
.nav-menu > li > a.active{color:#FFFFFF}
.nav-menu > li > a.active::after{transform:scaleX(1)}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:var(--r-btn);
  background:var(--accent);color:#170902;font-weight:700;font-size:14px;
  box-shadow:var(--sh-glow);
  transition:transform .2s ease,filter .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{color:#170902;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 16px 36px -12px rgba(255,106,43,.75)}
.nav-cta:active{transform:translateY(0)}
.nav-toggle{
  display:none;width:44px;height:40px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  background:transparent;color:var(--text);font-size:17px;cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.nav-toggle:hover{border-color:var(--line-hover);color:var(--brand);background:rgba(18,199,214,.08)}
.nav-mask{
  position:fixed;inset:0;z-index:50;background:rgba(6,10,20,.7);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.nav-mask.show{opacity:1;visibility:visible}

/* ============ 面包屑与页头 ============ */
.page-hero{
  position:relative;
  display:flex;align-items:center;
  min-height:320px;
  padding:56px 0 62px;
  background-image:
    linear-gradient(100deg, rgba(6,10,20,.95) 0%, rgba(6,10,20,.76) 52%, rgba(6,10,20,.93) 100%),
    url(/assets/images/backpic/back-2.webp);
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:rgba(18,199,214,.10);
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb-nav{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text-3);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb-nav a{color:var(--text-3)}
.breadcrumb-nav a:hover{color:var(--brand)}
.breadcrumb-nav i{font-size:10px}
.breadcrumb-nav span{color:var(--text-2)}
.page-hero h1{max-width:900px}
.page-hero-lead{max-width:720px;margin-top:18px;color:var(--text-2);font-size:17px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
  font-size:13px;padding:6px 14px;border-radius:999px;
  border:1px solid var(--line);color:var(--text-2);
  background:rgba(255,255,255,.03);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.tag:hover{border-color:var(--line-hover);color:var(--brand-light);background:rgba(18,199,214,.08)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

/* ============ 按钮 ============ */
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 26px;border-radius:var(--r-btn);border:0;
  background:var(--accent);color:#170902;
  font-weight:800;font-size:15.5px;cursor:pointer;
  box-shadow:var(--sh-glow);
  transition:transform .2s ease,filter .2s ease,box-shadow .2s ease;
}
.btn-main:hover{color:#170902;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 16px 38px -12px rgba(255,106,43,.75)}
.btn-main:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 24px;border-radius:var(--r-btn);
  background:transparent;border:1px solid rgba(18,199,214,.55);
  color:var(--brand);font-weight:700;font-size:15.5px;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-ghost:hover{background:rgba(18,199,214,.12);color:var(--brand-light);border-color:var(--brand);transform:translateY(-1px)}
.btn-link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14.5px;color:var(--brand)}
.btn-link-arrow i{transition:transform .2s ease}
.btn-link-arrow:hover i{transform:translateX(4px)}

/* ============ 板块骨架 ============ */
.section{padding:88px 0;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(14,21,36,.72),rgba(6,10,20,0));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.12em;
  color:var(--brand);margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--brand);border-radius:2px}
.section-sub{margin-top:14px;color:var(--text-2);font-size:17px;max-width:720px}

/* ============ 数据卡阵 ============ */
.spec-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
}
.spec-cell{
  position:relative;background:var(--panel);padding:30px 26px;
  transition:background .25s ease;
}
.spec-cell::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:var(--brand);opacity:0;transition:opacity .25s ease;
}
.spec-cell:hover{background:var(--panel-2)}
.spec-cell:hover::before{opacity:1}
.spec-value{font-size:clamp(30px,3.4vw,42px);font-weight:800;color:#FFFFFF;line-height:1.1;letter-spacing:-.02em}
.spec-value small{font-size:15px;font-weight:600;color:var(--brand);margin-left:6px;letter-spacing:0}
.spec-label{margin-top:12px;font-size:15px;font-weight:700;color:var(--text)}
.spec-desc{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.7}

/* ============ 规格清单表 ============ */
.spec-table{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--panel)}
.spec-row{display:grid;grid-template-columns:1.05fr 1.65fr 1fr;border-bottom:1px solid var(--line)}
.spec-row:last-child{border-bottom:0}
.spec-row > div{padding:20px 22px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.spec-row > div + div{border-left:1px solid var(--line)}
.spec-row .spec-key{color:var(--text);font-weight:700;font-size:15px}
.spec-row.head{background:var(--panel-2)}
.spec-row.head > div{
  padding:14px 22px;color:var(--brand);font-size:12.5px;
  font-weight:700;letter-spacing:.1em;
}
.spec-note{margin-top:16px;font-size:13px;color:var(--text-3)}

/* ============ 图文左右 ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:52px;align-items:center}
.split-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split-media::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);pointer-events:none}
.scene-list{list-style:none;display:grid;gap:14px;margin-top:26px}
.scene-list li{
  display:flex;gap:14px;padding:16px 18px;
  background:var(--panel);border:1px solid var(--line);
  border-left:2px solid var(--brand);border-radius:12px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.scene-list li:hover{transform:translateY(-3px);border-color:var(--line-hover);box-shadow:var(--sh-1)}
.scene-icon{
  flex:0 0 38px;width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;font-size:15px;
  background:rgba(18,199,214,.12);color:var(--brand);
}
.scene-list h3{font-size:16px;margin-bottom:4px}
.scene-list p{font-size:14px;color:var(--text-2)}

/* ============ 要点清单 + 侧栏 ============ */
.check-layout{display:grid;grid-template-columns:1.45fr .95fr;gap:48px;align-items:start}
.check-list{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.check-list li:hover{transform:translateY(-3px);border-color:var(--line-hover);box-shadow:var(--sh-1)}
.check-list i{color:var(--ok);margin-top:5px;font-size:15px}
.check-list strong{display:block;font-size:15px;color:var(--text);margin-bottom:4px;font-weight:700}
.check-list span{font-size:14px;color:var(--text-2);line-height:1.7}
.check-aside{display:grid;gap:18px;position:sticky;top:96px}
.aside-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);position:relative}
.aside-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.aside-media::after{content:"";position:absolute;inset:0;background:rgba(18,199,214,.10);pointer-events:none}
.aside-card{
  background:var(--panel);border:1px solid var(--line);border-top:2px solid var(--brand);
  border-radius:var(--r-card);padding:24px 22px;
}
.aside-card h3{font-size:18px;margin-bottom:10px}
.aside-card p{font-size:14px;color:var(--text-2);margin-bottom:16px}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px}
.faq-accordion{border-top:1px solid var(--line)}
.faq-accordion .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq-accordion .accordion-header{margin:0}
.faq-accordion .accordion-button{
  position:relative;
  background:transparent;color:var(--text);
  font-size:17px;font-weight:700;line-height:1.5;
  padding:22px 46px 22px 14px;box-shadow:none;
  transition:color .2s ease;
}
.faq-accordion .accordion-button::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;
  background:var(--brand);border-radius:2px;opacity:0;transition:opacity .22s ease;
}
.faq-accordion .accordion-button::after{
  background-image:none !important;
  content:"+";font-size:22px;font-weight:400;line-height:1;
  color:var(--brand);
  width:auto;height:auto;
  position:absolute;right:10px;
  display:flex;align-items:center;justify-content:center;
  transition:transform .25s ease,color .2s ease;
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--brand-light);background:transparent;box-shadow:none;
}
.faq-accordion .accordion-button:not(.collapsed)::before{opacity:1}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";transform:none}
.faq-accordion .accordion-button:hover{color:var(--brand-light)}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px}
.faq-accordion .accordion-body{padding:0 46px 24px 14px;color:var(--text-2);font-size:15.5px;line-height:1.8}

/* ============ 转化条 ============ */
.cta-band{
  padding:64px 0;
  background-image:
    linear-gradient(120deg, rgba(6,10,20,.94), rgba(10,17,30,.88)),
    url(/assets/images/backpic/back-3.png);
  background-size:cover;background-position:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  position:relative;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-inner h2{max-width:640px}
.cta-inner p{margin-top:14px;color:var(--text-2);font-size:16px;max-width:640px}
.privacy-note{
  margin-top:26px;font-size:12px;color:var(--text-3);line-height:1.7;max-width:820px;
}
.privacy-note i{color:var(--brand);margin-right:6px}

/* ============ 页脚 ============ */
.site-footer{
  background:#04070F;border-top:1px solid var(--line);
  padding:64px 0 0;position:relative;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand .brand{font-size:16.5px}
.footer-desc{margin-top:16px;font-size:14px;color:var(--text-3);line-height:1.8;max-width:340px}
.footer-col h4{font-size:15px;color:var(--text);margin-bottom:18px;font-weight:700}
.footer-col ul{list-style:none;display:grid;gap:11px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand-light)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2)}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:20px 0 26px;
  font-size:12.5px;color:var(--text-3);letter-spacing:.02em;
}

/* ============ 表单与弹层 ============ */
.form-label{font-size:13.5px;color:var(--text-2);margin-bottom:8px;font-weight:600}
.form-control,.form-select{
  width:100%;
  background:var(--panel);
  border:1px solid var(--line);
  color:var(--text);
  border-radius:var(--r-btn);
  padding:12px 14px;
  font-size:15px;
  line-height:1.5;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-control::placeholder{color:var(--text-3)}
.form-control:focus,.form-select:focus{
  background:var(--panel);
  color:var(--text);
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(18,199,214,.15);
  outline:none;
}
.form-select option{background:var(--panel);color:var(--text)}
.form-check-input{
  background-color:var(--panel);border:1px solid var(--line);
  width:16px;height:16px;margin-top:3px;
}
.form-check-input:checked{background-color:var(--brand);border-color:var(--brand)}
.form-check-input:focus{box-shadow:0 0 0 3px rgba(18,199,214,.18);border-color:var(--brand)}
.privacy-line{display:flex;gap:10px;align-items:flex-start;font-size:12px;color:var(--text-3);line-height:1.7;margin:6px 0 18px}

.modal-backdrop.show{opacity:.72;background:#04070F}
.lead-modal{
  background:rgba(20,30,48,.88);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.10);
  border-top:1px solid rgba(127,230,240,.35);
  border-radius:var(--r-modal);
  color:var(--text);
  box-shadow:var(--sh-2);
  position:relative;
}
.lead-modal .modal-body{padding:34px 32px 30px}
.modal-close{
  position:absolute;top:16px;right:16px;
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--text-2);
  display:grid;place-items:center;cursor:pointer;
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.modal-close:hover{border-color:var(--line-hover);color:var(--brand);transform:rotate(90deg)}
.modal-eyebrow{font-size:12.5px;letter-spacing:.14em;color:var(--brand);font-weight:700}
.lead-modal h2{font-size:24px;margin-top:10px}
.modal-sub{margin-top:12px;font-size:14px;color:var(--text-2)}
.lead-form{margin-top:22px}
.lead-form .row{gap:0}
.lead-form .form-group{margin-bottom:16px}
.w-100{width:100%}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .nav-menu > li > a{padding:20px 9px;font-size:14px}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1;max-width:560px}
}

@media (max-width:991.98px){
  .section{padding:64px 0}
  .nav-toggle{display:grid;place-items:center}
  .nav-wrap{
    position:fixed;top:0;right:0;bottom:0;
    width:min(320px,86vw);
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:14px;
    padding:84px 22px 30px;
    background:var(--panel);
    border-left:1px solid var(--line);
    transform:translateX(102%);
    transition:transform .3s ease;
    overflow-y:auto;
  }
  .nav-wrap.open{transform:translateX(0)}
  .nav-menu{flex-direction:column;align-items:stretch;gap:2px}
  .nav-menu > li > a{padding:14px 12px;font-size:15.5px;border-bottom:1px solid var(--line)}
  .nav-menu > li > a::after{display:none}
  .nav-menu > li > a:hover{color:var(--brand-light)}
  .nav-menu > li > a.active{color:var(--brand-light);background:rgba(18,199,214,.08);border-radius:8px}
  .nav-cta{justify-content:center;margin-top:16px}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:34px}
  .split-media{order:-1}
  .check-layout{grid-template-columns:1fr;gap:32px}
  .check-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}

@media (max-width:767.98px){
  body{font-size:16px}
  .section{padding:52px 0}
  .page-hero{min-height:0;padding:44px 0 50px}
  .page-hero-lead{font-size:16px}
  .top-strip-left{display:none}
  .top-strip-inner{justify-content:flex-end}
  .spec-grid{grid-template-columns:1fr}
  .spec-cell{padding:24px 20px}
  .spec-row{grid-template-columns:1fr}
  .spec-row.head{display:none}
  .spec-row > div{padding:15px 18px}
  .spec-row > div + div{border-left:0;border-top:1px dashed rgba(255,255,255,.07)}
  .check-list{grid-template-columns:1fr}
  .faq-accordion .accordion-button{font-size:15.5px;padding:18px 40px 18px 14px}
  .faq-accordion .accordion-body{padding:0 20px 20px 14px;font-size:15px}
  .cta-band{padding:52px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-inner .btn-main{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .lead-modal .modal-body{padding:28px 22px 24px}
}

@media (max-width:575.98px){
  .container{padding:0 16px}
  .brand-text{font-size:15.5px}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%}
  .spec-value{font-size:32px}
  .modal-dialog{margin:12px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}