/* roulang page: index */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#121B2B;
  --brand:#14C9A3;
  --brand-d:#0B8F76;
  --brand-l:#6BE7C9;
  --amber:#F2B544;
  --rose:#FF6B8A;
  --t1:#EAF1F8;
  --t2:#A6B6C9;
  --t3:#6F8199;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(255,255,255,.10);
  --r-card:16px;
  --r-btn:10px;
  --shadow:0 18px 48px -24px rgba(0,0,0,.9);
  --inner:inset 0 1px 0 rgba(255,255,255,.06);
  --side-w:248px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--t2);
  --bs-primary:var(--brand);
  --bs-border-color:var(--line);
  --bs-border-radius:16px;
  --bs-link-color:var(--brand);
  --bs-link-hover-color:var(--brand-l);
  --bs-emphasis-color:var(--t1);
  --bs-heading-color:var(--t1);
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg-0);color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;line-height:1.75;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-l);}
h1,h2,h3,h4{color:var(--t1);font-weight:800;letter-spacing:-.01em;line-height:1.28;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
table{border-collapse:collapse;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;}

/* ============ 侧边导航 ============ */
.app-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  display:flex;flex-direction:column;
  background:linear-gradient(180deg,#0A121F 0%,#070C15 100%);
  border-right:1px solid var(--line);
  padding:24px 16px 20px;z-index:1040;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;padding:4px 6px 0;}
.brand-mark{display:flex;color:var(--brand);filter:drop-shadow(0 0 10px rgba(20,201,163,.4));flex:0 0 auto;}
.brand-text strong{display:block;font-size:17px;font-weight:800;color:var(--t1);letter-spacing:.02em;}
.brand-text em{display:block;font-style:normal;font-size:12px;color:var(--t3);letter-spacing:.08em;}
.side-nav{margin-top:28px;display:flex;flex-direction:column;gap:6px;}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 13px;border-radius:12px;font-size:15px;color:var(--t2);
  border:1px solid transparent;transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.side-link i{width:20px;text-align:center;font-size:14px;color:var(--t3);transition:color .22s var(--ease);}
.side-link:hover{background:rgba(255,255,255,.04);color:var(--t1);}
.side-link:hover i{color:var(--brand);}
.side-link.active{
  background:var(--glass);border-color:var(--glass-line);color:var(--t1);
  box-shadow:0 0 0 1px rgba(20,201,163,.16),0 0 24px -10px rgba(20,201,163,.55);
}
.side-link.active i{color:var(--brand);}
.side-link.active::before{
  content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--brand);
}
.side-foot{margin-top:auto;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;}
.side-cta{width:100%;justify-content:center;}
.side-note{font-size:12.5px;color:var(--t3);text-align:center;}

/* ============ 主内容外壳 ============ */
.app-main{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column;position:relative;}
.mobile-bar{display:none;}
.shell{width:100%;max-width:1180px;margin:0 auto;padding:0 32px;}

/* ============ 按钮 ============ */
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.18);
  background:linear-gradient(180deg,var(--brand-l),var(--brand));
  color:#04231D;font-size:15px;font-weight:700;letter-spacing:.01em;cursor:pointer;
  box-shadow:0 0 0 1px rgba(20,201,163,.22),0 14px 32px -16px rgba(20,201,163,.75);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),filter .24s var(--ease);
}
.btn-brand:hover{color:#04231D;transform:translateY(-1px);filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(20,201,163,.45),0 18px 42px -16px rgba(20,201,163,.85);}
.btn-brand:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);border:1px solid var(--line-2);
  background:transparent;color:var(--t1);font-size:15px;font-weight:600;cursor:pointer;
  transition:border-color .24s var(--ease),color .24s var(--ease),background .24s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-l);background:rgba(20,201,163,.06);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600;
}
.btn-text i{transition:transform .24s var(--ease);}
.btn-text:hover{color:var(--brand-l);text-decoration:underline;text-underline-offset:3px;}
.btn-text:hover i{transform:translateX(3px);}

/* ============ 徽章 ============ */
.badge-cat{
  display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--brand);background:rgba(20,201,163,.08);
  border:1px solid rgba(20,201,163,.28);white-space:nowrap;
}
.badge-tier{
  display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--amber);background:rgba(242,181,68,.1);
  border:1px solid rgba(242,181,68,.32);white-space:nowrap;
}
.badge-reco{
  display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--rose);background:rgba(255,107,138,.12);
  border:1px solid rgba(255,107,138,.4);white-space:nowrap;
}

/* ============ Hero ============ */
.hero{position:relative;padding:78px 0 76px;overflow:hidden;border-bottom:1px solid var(--line);}
.hero::after{
  content:"";position:absolute;top:-180px;right:-140px;width:640px;height:640px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,201,163,.16),rgba(20,201,163,0) 68%);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative;z-index:1;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:999px;
  font-size:12.5px;color:var(--brand-l);background:rgba(20,201,163,.08);
  border:1px solid rgba(20,201,163,.26);margin-bottom:18px;
}
.hero h1{font-size:clamp(28px,4.4vw,44px);line-height:1.2;}
.hero-sub{margin-top:18px;font-size:16px;color:var(--t2);max-width:540px;}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap;}
.hero-stats li{display:flex;flex-direction:column;}
.hero-stats b{font-size:25px;font-weight:800;color:var(--brand-l);letter-spacing:-.01em;font-variant-numeric:tabular-nums;}
.hero-stats span{font-size:13px;color:var(--t3);}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow),var(--inner);aspect-ratio:16/10;
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(6,10,18,0) 38%,rgba(6,10,18,.88) 100%);
}
.hero-media figcaption{
  position:absolute;left:20px;bottom:16px;right:20px;z-index:2;font-size:13px;color:var(--t2);
}

/* ============ 板块通用 ============ */
.section{padding:88px 0;}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{margin-bottom:40px;max-width:760px;}
.sec-head .eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.14em;color:var(--brand);margin-bottom:12px;font-weight:600;
}
.sec-head h2{font-size:clamp(24px,3vw,32px);}
.sec-head p{margin-top:14px;font-size:15px;color:var(--t2);}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.sec-head-row .sec-head{margin-bottom:0;}

/* ============ 权益对比表 ============ */
.compare-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--bg-1);
  -webkit-overflow-scrolling:touch;
}
.compare-table{width:100%;min-width:940px;font-size:14.5px;}
.compare-table th,.compare-table td{
  padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle;
}
.compare-table thead th{
  position:sticky;top:0;z-index:2;background:#0D1524;font-size:13px;font-weight:600;
  letter-spacing:.04em;color:var(--t3);
}
.compare-table thead th strong{display:block;color:var(--t1);font-size:15px;font-weight:700;letter-spacing:0;margin-top:2px;}
.compare-table tbody td:first-child,
.compare-table thead th:first-child{
  position:sticky;left:0;z-index:1;background:#0B1220;color:var(--t1);font-weight:600;
}
.compare-table thead th:first-child{z-index:3;background:#0D1524;}
.compare-table tbody tr:nth-child(even) td{background:rgba(255,255,255,.012);}
.compare-table tbody tr:nth-child(even) td:first-child{background:#0C1421;}
.compare-table tbody tr:hover td{background:rgba(20,201,163,.045);}
.compare-table tbody tr:hover td:first-child{background:#0D1826;}
.compare-table th.col-reco,.compare-table td.col-reco{
  background:rgba(255,107,138,.055);
  border-left:1px solid rgba(255,107,138,.35);
  border-right:1px solid rgba(255,107,138,.35);
}
.compare-table thead th.col-reco{border-top:1px solid rgba(255,107,138,.35);}
.compare-table tbody tr:last-child td.col-reco{border-bottom:1px solid rgba(255,107,138,.35);}
.reco-flag{margin-left:8px;}
.mark-yes{color:var(--brand);font-weight:700;font-size:15px;}
.mark-no{color:var(--t3);font-size:15px;}
.scroll-hint{display:none;margin-top:10px;font-size:13px;color:var(--t3);}
.compare-foot{display:flex;align-items:center;gap:18px;margin-top:20px;flex-wrap:wrap;}
.compare-foot span{font-size:13px;color:var(--t3);}

/* ============ 等级亮点 ============ */
.tier-layout{display:grid;grid-template-columns:262px 1fr;gap:28px;align-items:start;}
.tier-tabs{display:flex;flex-direction:column;gap:10px;}
.tier-tab{
  position:relative;text-align:left;padding:16px 18px;border-radius:12px;cursor:pointer;
  background:var(--bg-1);border:1px solid var(--line);color:var(--t2);
  transition:border-color .24s var(--ease),background .24s var(--ease),box-shadow .24s var(--ease);
}
.tier-tab:hover{border-color:var(--line-2);}
.tier-tab strong{display:block;font-size:16px;color:var(--t1);}
.tier-tab small{display:block;font-size:12.5px;color:var(--t3);margin-top:3px;}
.tier-tab .dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:8px;vertical-align:middle;}
.tier-tab.is-active{
  background:rgba(20,201,163,.06);border-color:rgba(20,201,163,.4);
  box-shadow:0 0 28px -14px rgba(20,201,163,.85);
}
.tier-tab.is-active::before{
  content:"";position:absolute;left:-1px;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--brand);
}
.tier-panel{
  display:none;padding:30px 32px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--glass-line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow),var(--inner);
}
.tier-panel.is-active{display:block;animation:fadeUp .32s var(--ease) both;}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}
.tier-panel h3{font-size:22px;margin-bottom:6px;}
.tier-panel .panel-note{font-size:13.5px;color:var(--t3);margin-bottom:20px;}
.tier-points{display:flex;flex-direction:column;gap:14px;}
.tier-points li{display:flex;gap:12px;font-size:15px;color:var(--t2);line-height:1.8;}
.tier-points i{color:var(--brand);margin-top:6px;font-size:13px;}
.tier-panel .panel-cta{margin-top:26px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.tier-panel .panel-cta small{font-size:13px;color:var(--t3);}

/* ============ 专属内容预览 ============ */
.preview-rail{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:16px;margin:0 -4px;
}
.preview-rail::-webkit-scrollbar{height:6px;}
.preview-rail::-webkit-scrollbar-track{background:rgba(255,255,255,.05);border-radius:99px;}
.preview-rail::-webkit-scrollbar-thumb{background:rgba(20,201,163,.35);border-radius:99px;}
.preview-card{
  flex:0 0 320px;scroll-snap-align:start;border-radius:var(--r-card);overflow:hidden;
  background:var(--bg-1);border:1px solid var(--line);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.preview-card:hover{transform:translateY(-3px);border-color:rgba(20,201,163,.35);box-shadow:var(--shadow),var(--inner);}
.preview-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--bg-2);}
.preview-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.preview-card:hover .thumb img{transform:scale(1.04);}
.preview-card .body{padding:20px 22px 22px;}
.preview-card h3{font-size:17px;margin:12px 0 8px;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.preview-card p{font-size:14px;color:var(--t2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.preview-card .meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--t3);margin-top:14px;}

/* ============ 最新信息（CMS 列表） ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.news-card{
  display:flex;flex-direction:column;border-radius:var(--r-card);overflow:hidden;
  background:var(--bg-1);border:1px solid var(--line);color:var(--t2);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(20,201,163,.32);box-shadow:var(--shadow),var(--inner);color:var(--t2);}
.news-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--bg-2);}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.news-card:hover .thumb img{transform:scale(1.04);}
.news-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.news-card .meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--t3);}
.news-card h3{
  font-size:17px;margin:12px 0 10px;line-height:1.5;color:var(--t1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .sum{
  font-size:14px;line-height:1.72;color:var(--t2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .more{margin-top:auto;padding-top:16px;font-size:13.5px;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.news-card:hover .more i{transform:translateX(3px);}
.news-card .more i{transition:transform .24s var(--ease);}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 24px;border:1px dashed var(--line-2);border-radius:var(--r-card);background:var(--bg-1);text-align:center;
}
.empty-state i{font-size:30px;color:var(--t3);}
.empty-state p{font-size:15px;color:var(--t3);}

/* ============ 流程条 ============ */
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.flow-item{
  padding:24px 22px;border-radius:var(--r-card);background:var(--bg-1);border:1px solid var(--line);
  transition:border-color .24s var(--ease);
}
.flow-item:hover{border-color:var(--line-2);}
.flow-item .step{
  font-size:13px;font-weight:700;color:var(--amber);letter-spacing:.08em;font-variant-numeric:tabular-nums;
}
.flow-item h3{font-size:17px;margin:12px 0 8px;}
.flow-item p{font-size:14px;color:var(--t2);line-height:1.72;}

/* ============ FAQ ============ */
.faq-accordion{background:var(--bg-1);border:1px solid var(--line);border-radius:12px;overflow:hidden;}
.faq-accordion .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.faq-accordion .accordion-item:last-child{border-bottom:0;}
.faq-accordion .accordion-header{margin:0;}
.faq-accordion .accordion-button{
  display:flex;align-items:center;gap:14px;width:100%;padding:20px 22px;
  background:transparent;border:0;color:var(--t1);font-size:16px;font-weight:700;text-align:left;
  box-shadow:none;transition:background .24s var(--ease),color .24s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand-l);background:rgba(20,201,163,.05);}
.faq-accordion .accordion-button::before{
  content:"\f059";font-family:"Font Awesome 6 Free";font-weight:900;font-size:15px;color:var(--brand);flex:0 0 auto;
}
.faq-accordion .accordion-button::after{
  content:"+";background-image:none;width:26px;height:26px;line-height:24px;text-align:center;
  font-size:19px;font-weight:400;color:var(--brand);border:1px solid rgba(20,201,163,.35);
  border-radius:8px;transform:none;transition:transform .26s var(--ease),background .24s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  content:"–";transform:rotate(90deg);background:rgba(20,201,163,.12);
}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px;}
.faq-accordion .accordion-button:not(.collapsed)::before{content:"\f059";}
.faq-accordion .accordion-body{
  padding:0 22px 22px 60px;font-size:15px;line-height:1.8;color:var(--t2);
}
.faq-accordion .accordion-collapse.show .accordion-body{position:relative;}

/* ============ 末尾 CTA ============ */
.cta-card{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:var(--bg-1);border:1px solid var(--line);
  padding:44px 46px;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;
  box-shadow:var(--shadow),var(--inner);
}
.cta-card::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:640px;height:420px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(20,201,163,.16),rgba(20,201,163,0) 66%);
}
.cta-card h2{font-size:clamp(22px,2.8vw,30px);position:relative;z-index:1;}
.cta-card p{margin-top:12px;font-size:15px;color:var(--t2);max-width:560px;position:relative;z-index:1;}
.cta-card .cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap;}
.cta-notes{display:flex;gap:26px;flex-wrap:wrap;margin-top:18px;font-size:13px;color:var(--t3);}
.cta-notes li{display:flex;align-items:center;gap:7px;}
.cta-notes i{color:var(--brand);font-size:12px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);margin-top:auto;padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .brand{padding:0;margin-bottom:16px;}
.footer-brand p{font-size:13.5px;color:var(--t3);line-height:1.85;max-width:320px;}
.footer-contact{display:inline-flex;align-items:center;gap:7px;margin-top:16px;font-size:14px;font-weight:600;}
.footer-col h4{font-size:14px;color:var(--t1);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--t2);}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.footer-bar{
  margin-top:48px;border-top:1px solid var(--line);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.footer-bar a{color:var(--t3);}
.footer-bar a:hover{color:var(--brand);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:26px;bottom:26px;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  background:rgba(18,27,43,.8);border:1px solid var(--glass-line);color:var(--t1);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s,box-shadow .3s var(--ease);
  z-index:1050;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{box-shadow:0 0 24px -6px rgba(20,201,163,.75);color:var(--brand-l);border-color:rgba(20,201,163,.4);}

/* ============ 抽屉遮罩 ============ */
.sidebar-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:1035;
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s;
}
.sidebar-mask.show{opacity:1;visibility:visible;}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  :root{--side-w:72px;}
  .app-sidebar{padding:22px 10px;align-items:center;}
  .brand{padding:0;justify-content:center;}
  .brand-text{display:none;}
  .side-nav{width:100%;margin-top:24px;}
  .side-link{justify-content:center;padding:12px 0;gap:0;}
  .side-link span{display:none;}
  .side-link.active::before{left:-10px;}
  .side-foot{align-items:center;width:100%;}
  .side-cta{padding:12px 0;width:52px;height:44px;overflow:hidden;}
  .side-cta span{display:none;}
  .side-note{display:none;}
}
@media (max-width:991.98px){
  .app-sidebar{
    width:290px;max-width:80vw;padding:24px 18px;
    transform:translateX(-100%);transition:transform .3s var(--ease);
    align-items:stretch;
  }
  .app-sidebar.open{transform:none;}
  .badge,.side-link span,.side-note,.brand-text{display:block;}
  .brand{padding:4px 6px 0;justify-content:flex-start;}
  .side-link{justify-content:flex-start;padding:12px 13px;gap:12px;}
  .side-link.active::before{left:-18px;}
  .side-cta{width:100%;padding:12px 26px;}
  .side-cta span{display:inline;}
  .app-main{margin-left:0;padding-top:60px;}
  .mobile-bar{
    display:flex;align-items:center;justify-content:space-between;
    position:fixed;top:0;left:0;right:0;height:60px;padding:0 18px;z-index:1030;
    background:rgba(9,14,24,.92);border-bottom:1px solid var(--line);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  }
  .mobile-bar .brand{padding:0;}
  .mobile-bar .brand-text strong{font-size:16px;}
  .mobile-bar .brand-text em{display:none;}
  .hamburger{
    width:42px;height:42px;border-radius:10px;background:transparent;color:var(--t1);
    border:1px solid var(--line-2);display:flex;align-items:center;justify-content:center;font-size:17px;
    transition:border-color .24s var(--ease),color .24s var(--ease);
  }
  .hamburger:hover{border-color:var(--brand);color:var(--brand-l);}
  .hero{padding:52px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media{order:2;}
  .section{padding:64px 0;}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .tier-layout{grid-template-columns:1fr;gap:20px;}
  .tier-tabs{flex-direction:column;}
  .cta-card{grid-template-columns:1fr;padding:34px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .scroll-hint{display:block;}
}
@media (max-width:767.98px){
  .shell{padding:0 18px;}
  .hero h1{font-size:clamp(26px,6.8vw,32px);}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{flex:1 1 100%;}
  .hero-stats{gap:24px;}
  .news-grid{grid-template-columns:1fr;}
  .flow-grid{grid-template-columns:1fr;}
  .preview-card{flex:0 0 84%;}
  .tier-panel{padding:24px 20px;}
  .faq-accordion .accordion-body{padding:0 18px 20px 18px;}
  .faq-accordion .accordion-button{padding:17px 16px;font-size:15px;gap:10px;}
  .cta-card .cta-actions{flex-direction:column;}
  .cta-card .cta-actions .btn-brand,.cta-card .cta-actions .btn-ghost{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bar{flex-direction:column;align-items:flex-start;gap:10px;}
  .to-top{right:16px;bottom:16px;}
}
@media (max-width:575.98px){
  .section{padding:52px 0;}
  .hero{padding:44px 0 48px;}
  .sec-head h2{font-size:23px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#121B2B;
  --brand:#14C9A3;
  --brand-dark:#0B8F76;
  --brand-light:#6BE7C9;
  --amber:#F2B544;
  --rose:#FF6B8A;
  --t1:#EAF1F8;
  --t2:#A6B6C9;
  --t3:#6F8199;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(255,255,255,.10);
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --r-tbl:12px;
  --shadow:0 18px 48px -24px rgba(0,0,0,.9);
  --inner:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:248px;

  --bs-body-bg:#060A12;
  --bs-body-color:#A6B6C9;
  --bs-primary:#14C9A3;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-border-radius:12px;
  --bs-link-color:#6BE7C9;
  --bs-link-hover-color:#14C9A3;
  --bs-font-sans-serif:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand-light);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--brand)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--t1);margin:0;letter-spacing:-.01em;font-weight:750}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand);color:#04231C;padding:10px 16px;border-radius:0 0 10px 0;z-index:2000}
.skip-link:focus{left:0}

/* ============ 侧栏导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--bg-1);
  border-right:1px solid var(--line);
  padding:22px 16px 18px;
  display:flex;
  flex-direction:column;
  gap:20px;
  z-index:1045;
  overflow-y:auto;
  scrollbar-width:thin;
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.10);border-radius:999px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:grid;place-items:center;
  border-radius:12px;
  color:var(--brand);
  background:rgba(20,201,163,.10);
  border:1px solid rgba(20,201,163,.22);
  box-shadow:0 0 22px -10px rgba(20,201,163,.7);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{color:var(--t1);font-size:17px;font-weight:800;letter-spacing:.02em}
.brand-text em{font-style:normal;color:var(--t3);font-size:11.5px;letter-spacing:.04em;margin-top:3px}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:46px;padding:0 12px;
  border-radius:var(--r-btn);
  color:var(--t2);
  font-size:14.5px;
  transition:background .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease);
}
.side-link i{width:20px;text-align:center;font-size:15px;color:var(--t3);transition:color .22s var(--ease)}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--t1)}
.side-link:hover i{color:var(--brand-light)}
.side-link.active{
  background:var(--glass);
  color:var(--t1);
  box-shadow:0 0 0 1px rgba(20,201,163,.20), 0 0 24px -8px rgba(20,201,163,.45), var(--inner);
}
.side-link.active i{color:var(--brand)}
.side-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
  box-shadow:0 0 12px rgba(20,201,163,.75);
}
.side-cta{margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  width:100%;
  padding:12px 20px;
  border:0;border-radius:var(--r-btn);
  background:var(--brand);
  color:#04231C;font-size:15px;font-weight:700;
  cursor:pointer;
  box-shadow:0 0 0 1px rgba(20,201,163,.2), var(--inner);
  transition:transform .2s var(--ease),filter .2s var(--ease),box-shadow .25s var(--ease);
}
.btn-brand:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 24px -2px rgba(20,201,163,.55);color:#04231C}
.btn-brand:active{transform:translateY(0);box-shadow:inset 0 2px 8px rgba(0,0,0,.35)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;
  border-radius:var(--r-btn);
  background:transparent;
  border:1px solid var(--glass-line);
  color:var(--t1);font-size:15px;font-weight:600;
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-light);background:rgba(20,201,163,.06)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-light);font-size:14px;font-weight:600;
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.btn-text:hover{border-bottom-color:var(--brand);color:var(--brand)}

/* ============ 顶部栏（移动端） ============ */
.topbar{
  display:none;
  position:sticky;top:0;z-index:1035;
  height:60px;
  align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(11,18,32,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar .brand-text strong{font-size:16px}
.topbar .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px}
.hamburger{
  width:42px;height:42px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-line);
  color:var(--t1);font-size:17px;cursor:pointer;
}
.hamburger:hover{color:var(--brand-light);border-color:rgba(20,201,163,.4)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s;
  z-index:1040;
}
.drawer-mask.show{opacity:1;visibility:visible}

/* ============ 布局 ============ */
.shell-main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 32px}
main{flex:1 1 auto}

/* ============ 面包屑 ============ */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);
  padding:28px 0 0;
}
.crumbs a{color:var(--t3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:rgba(255,255,255,.20)}
.crumbs .cur{color:var(--t3);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章布局 ============ */
.article-wrap{padding-bottom:96px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,800px) 240px;
  gap:56px;
  justify-content:center;
  align-items:start;
  padding-top:26px;
}
.article-main{min-width:0}

/* ============ 文章头 ============ */
.article-head{padding-bottom:26px;border-bottom:1px solid var(--line)}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 11px;
  border-radius:var(--r-pill);
  background:rgba(20,201,163,.10);
  border:1px solid rgba(20,201,163,.28);
  color:var(--brand-light);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.article-head h1{
  font-size:clamp(28px,3.6vw,40px);
  line-height:1.32;
  font-weight:800;
  margin:16px 0 18px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13px;color:var(--t3);
}
.meta-row .divider{width:1px;height:12px;background:var(--line)}
.meta-row i{color:var(--t3);margin-right:5px}
.head-actions{margin-left:auto;display:flex;gap:8px}
.icon-btn{
  width:36px;height:36px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-line);
  color:var(--t2);font-size:14px;cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.icon-btn:hover{color:var(--brand-light);border-color:rgba(20,201,163,.42);transform:translateY(-1px)}

/* ============ 封面 ============ */
.hero-cover{margin:28px 0 0}
.hero-cover img{
  width:100%;aspect-ratio:21/9;object-fit:cover;
  border-radius:var(--r-card);
  background:var(--bg-2);
  border:1px solid var(--line);
}
.hero-cover figcaption{margin-top:10px;font-size:13px;color:var(--t3)}

/* ============ 正文 ============ */
.article-body{
  color:var(--t2);
  font-size:16px;
  line-height:1.85;
  padding-top:30px;
  word-break:break-word;
}
.article-body h2{font-size:28px;line-height:1.4;margin:44px 0 12px;font-weight:750}
.article-body h3{font-size:21px;line-height:1.45;margin:34px 0 10px;font-weight:700}
.article-body h4{font-size:17px;margin:26px 0 8px;color:var(--t1)}
.article-body p{margin:0 0 1.6em}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 1.6em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px;line-height:1.8}
.article-body blockquote{
  margin:0 0 1.6em;
  padding:16px 20px;
  border-left:3px solid var(--brand);
  background:var(--bg-1);
  border-radius:0 var(--r-tbl) var(--r-tbl) 0;
  font-size:15px;
  color:var(--t2);
}
.article-body img{border-radius:var(--r-tbl);margin:10px 0;border:1px solid var(--line)}
.article-body a{color:var(--brand-light);border-bottom:1px solid rgba(107,231,201,.35)}
.article-body a:hover{color:var(--brand);border-bottom-color:var(--brand)}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-tbl);
  overflow:hidden;
  margin:0 0 1.6em;
  font-size:15px;
}
.article-body th,.article-body td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.article-body th{font-size:13px;color:var(--t3);font-weight:600;background:rgba(255,255,255,.02)}
.article-body tr:last-child td{border-bottom:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:42px 0}
.article-body strong{color:var(--t1);font-weight:700}
.article-body code{
  background:var(--bg-2);padding:2px 6px;border-radius:6px;
  font-size:14px;color:var(--brand-light);
}
.empty-state{
  margin:36px 0 0;
  padding:56px 28px;
  text-align:center;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
}
.empty-state i{font-size:34px;color:var(--t3);display:block;margin-bottom:16px}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{font-size:15px;color:var(--t2);margin-bottom:22px}

/* ============ 标签 ============ */
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:44px;padding-top:24px;border-top:1px solid var(--line);
}
.tag-row .label{font-size:13px;color:var(--t3);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 13px;
  border-radius:var(--r-pill);
  background:var(--glass);border:1px solid var(--glass-line);
  color:var(--t2);font-size:12.5px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.tag:hover{color:var(--brand-light);border-color:rgba(20,201,163,.42)}

/* ============ 右侧辅助栏 ============ */
.article-aside{position:sticky;top:28px;display:flex;flex-direction:column;gap:20px}
.aside-card{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:var(--shadow),var(--inner);
}
.aside-card h3{
  font-size:13px;color:var(--t3);font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;margin-bottom:14px;
}
.aside-nav{display:flex;flex-direction:column;gap:2px}
.aside-nav a{
  position:relative;
  display:block;padding:9px 12px;border-radius:9px;
  font-size:14px;color:var(--t2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.aside-nav a:hover{background:rgba(255,255,255,.05);color:var(--t1)}
.aside-nav a.on{color:var(--t1);background:rgba(20,201,163,.10)}
.aside-nav a.on::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}

/* ============ 文末导航 ============ */
.post-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
  margin-top:56px;
}
.post-nav a{
  display:flex;flex-direction:column;gap:8px;
  padding:20px 22px;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.post-nav a:hover{border-color:rgba(20,201,163,.42);transform:translateY(-2px)}
.post-nav span{font-size:12.5px;color:var(--t3);letter-spacing:.04em}
.post-nav strong{font-size:15.5px;color:var(--t1);font-weight:650}
.post-nav .to-right{text-align:right;align-items:flex-end}

/* ============ 板块通用 ============ */
.section{padding-top:88px}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:32px;
}
.section-head h2{font-size:28px;line-height:1.35}
.section-head p{font-size:14px;color:var(--t3);margin-top:8px}

/* ============ 相关推荐 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(20,201,163,.38)}
.card-thumb{overflow:hidden;background:var(--bg-2)}
.card-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s var(--ease)}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:17px;line-height:1.5;font-weight:680}
.card-body h3 a{color:var(--t1)}
.card-body h3 a:hover{color:var(--brand-light)}
.card-body p{font-size:14px;color:var(--t2);line-height:1.7}
.card-meta{display:flex;align-items:center;gap:10px;margin-top:auto;font-size:13px;color:var(--t3)}

/* ============ FAQ ============ */
.faq-wrap{
  margin-top:88px;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:36px 36px 28px;
  box-shadow:var(--shadow),var(--inner);
}
.faq-title{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.faq-title i{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:rgba(20,201,163,.12);color:var(--brand);font-size:15px;
}
.faq-title h2{font-size:24px}
.faq-acc .accordion-item{
  background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;
}
.faq-acc .accordion-item:first-child{border-top:0}
.faq-acc .accordion-button{
  position:relative;
  background:transparent;border:0;box-shadow:none;
  color:var(--t1);font-size:16px;font-weight:640;
  padding:20px 44px 20px 16px;
  line-height:1.6;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);opacity:0;transition:opacity .2s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--brand-light);background:rgba(20,201,163,.05);
}
.faq-acc .accordion-button:not(.collapsed)::before{opacity:1}
.faq-acc .accordion-button::after{
  content:"+";
  background-image:none;width:auto;height:auto;
  font-size:20px;line-height:1;color:var(--brand);
  transform:none;transition:transform .25s var(--ease);
  position:absolute;right:16px;top:50%;margin-top:-11px;
}
.faq-acc .accordion-button:not(.collapsed)::after{content:"−";transform:rotate(180deg)}
.faq-acc .accordion-button:focus{box-shadow:none}
.faq-acc .accordion-body{
  padding:0 44px 22px 16px;
  font-size:15px;line-height:1.8;color:var(--t2);
}

/* ============ CTA ============ */
.cta-card{
  position:relative;
  margin-top:88px;
  padding:44px 44px;
  border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(20,201,163,.12),rgba(11,18,32,.9) 58%),var(--bg-1);
  border:1px solid rgba(20,201,163,.22);
  overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--shadow),var(--inner);
}
.cta-card::after{
  content:"";position:absolute;left:50%;top:50%;width:520px;height:520px;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(20,201,163,.12),transparent 68%);
  pointer-events:none;
}
.cta-card > *{position:relative;z-index:1}
.cta-card h2{font-size:26px;margin-bottom:10px}
.cta-card p{font-size:15px;color:var(--t2);max-width:56ch}
.cta-notes{
  display:flex;flex-wrap:wrap;gap:22px;margin-top:16px;
  font-size:13px;color:var(--t3);
}
.cta-notes span{display:inline-flex;align-items:center;gap:7px}
.cta-notes i{color:var(--brand)}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:104px;
  background:var(--bg-1);
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding:56px 0 40px;
}
.footer-brand p{font-size:13px;color:var(--t3);line-height:1.8;margin:16px 0 16px;max-width:36ch}
.footer-contact{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--brand-light);
  padding:9px 15px;border-radius:var(--r-btn);
  background:rgba(20,201,163,.08);
  border:1px solid rgba(20,201,163,.24);
}
.footer-contact:hover{background:rgba(20,201,163,.14);color:var(--brand-light)}
.footer-col h4{font-size:14px;color:var(--t1);margin-bottom:16px;font-weight:680}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--t2)}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.footer-bar{
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--t3);
}
.footer-bar a{color:var(--t3)}
.footer-bar a:hover{color:var(--brand)}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-line);
  backdrop-filter:blur(12px);
  color:var(--t1);font-size:15px;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s var(--ease),visibility .25s,transform .25s var(--ease),box-shadow .25s var(--ease);
  z-index:1050;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{box-shadow:0 0 24px -4px rgba(20,201,163,.6);color:var(--brand-light)}

/* ============ 响应式 ============ */
@media (max-width:1399.98px){
  .article-layout{grid-template-columns:minmax(0,780px) 220px;gap:44px}
}
@media (min-width:992px) and (max-width:1199.98px){
  :root{--sidebar-w:72px}
  .sidebar{padding:20px 12px 18px;align-items:center}
  .sidebar .brand-text,.sidebar .side-cta span{display:none}
  .side-nav{width:100%;align-items:center}
  .side-link{justify-content:center;padding:0;width:46px}
  .side-link span{display:none}
  .side-link.active::before{left:-12px}
  .side-cta{width:100%}
  .sidebar .btn-brand{width:46px;height:46px;padding:0;border-radius:14px}
  .article-layout{grid-template-columns:minmax(0,760px);gap:0}
  .article-aside{display:none}
}
@media (max-width:991.98px){
  :root{--sidebar-w:0px}
  .sidebar{
    width:78vw;max-width:320px;
    transform:translateX(-102%);
    transition:transform .3s var(--ease);
    box-shadow:24px 0 60px -30px rgba(0,0,0,.95);
    padding:20px 16px;
  }
  .sidebar.open{transform:none}
  .shell-main{margin-left:0}
  .topbar{display:flex}
  .side-link{height:48px;font-size:15px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;padding-top:18px}
  .article-aside{display:none}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 30px}
  .cta-card{flex-direction:column;align-items:flex-start;padding:32px 26px}
  .cta-card .btn-brand,.cta-card .btn-ghost{width:100%}
  .post-nav{grid-template-columns:1fr}
  .post-nav .to-right{text-align:left;align-items:flex-start}
}
@media (max-width:767.98px){
  .wrap{padding:0 20px}
  .article-head h1{font-size:27px}
  .article-body{font-size:15.5px}
  .article-body h2{font-size:23px;margin-top:36px}
  .article-body h3{font-size:19px}
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .faq-wrap{padding:26px 20px 20px;margin-top:64px}
  .section{padding-top:64px}
  .cta-card{margin-top:64px}
  .site-footer{margin-top:72px}
  .head-actions{margin-left:0;width:100%}
}
@media (max-width:575.98px){
  .wrap{padding:0 16px}
  .article-head h1{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bar{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:18px}
  .meta-row{gap:10px;font-size:12.5px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#121B2B;
  --brand:#14C9A3;
  --brand-d:#0B8F76;
  --brand-l:#6BE7C9;
  --amber:#F2B544;
  --rose:#FF6B8A;
  --t1:#EAF1F8;
  --t2:#A6B6C9;
  --t3:#6F8199;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --glass-b:rgba(255,255,255,.10);
  --r-card:16px;
  --r-btn:10px;
  --r-badge:999px;
  --r-tab:12px;
  --shadow-card:0 18px 48px -24px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-soft:0 12px 32px -20px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --shell:1280px;
  --side-w:248px;
  --bs-body-bg:#060A12;
  --bs-body-color:#A6B6C9;
  --bs-primary:#14C9A3;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-border-radius:16px;
  --bs-link-color:#6BE7C9;
  --bs-link-hover-color:#14C9A3;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;background:var(--bg-2)}
a{color:var(--brand-l);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--brand)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--t1);margin:0;line-height:1.3;letter-spacing:-.01em;font-weight:800}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:4px;
}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 32px}
.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:Inter,"PingFang SC",sans-serif}

/* ============ 左侧导航 ============ */
.app-side{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side-w);
  padding:26px 18px 22px;
  background:linear-gradient(180deg,#08101D 0%,#060A12 100%);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap:26px;
  z-index:70;
}
.brand{display:flex;align-items:center;gap:11px;color:var(--t1)}
.brand:hover{color:var(--t1)}
.brand-mark{
  display:grid;place-items:center;
  width:40px;height:40px;flex:none;
  border-radius:12px;
  color:var(--brand);
  background:rgba(20,201,163,.08);
  border:1px solid rgba(20,201,163,.22);
  box-shadow:0 0 0 1px rgba(20,201,163,.06), inset 0 1px 0 rgba(255,255,255,.06);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:.02em}
.brand-text em{font-style:normal;font-size:11px;color:var(--t3);letter-spacing:.08em;margin-top:2px}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1;overflow-y:auto}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:11px 12px 11px 15px;
  border-radius:10px;
  color:var(--t2);
  font-size:14.5px;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.side-link i{width:18px;text-align:center;font-size:15px;flex:none}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--t1)}
.side-link.active{
  background:var(--glass);
  color:var(--t1);
  border:1px solid var(--glass-b);
  box-shadow:0 0 24px -12px rgba(20,201,163,.55), inset 0 1px 0 rgba(255,255,255,.06);
}
.side-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.side-link.active i{color:var(--brand)}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 14px;
  border-radius:var(--r-btn);
  background:var(--brand);
  color:#04211B;
  font-weight:700;
  font-size:14.5px;
  box-shadow:0 0 0 1px rgba(20,201,163,.35), inset 0 1px 0 rgba(255,255,255,.35);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.side-cta:hover{
  color:#04211B;background:#1BDCB4;transform:translateY(-1px);
  box-shadow:0 0 24px rgba(20,201,163,.45);
}
.side-tip{font-size:11.5px;color:var(--t3);line-height:1.6}

/* ============ 移动顶栏 ============ */
.topbar{
  display:none;
  position:sticky;top:0;z-index:65;
  height:60px;align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(8,14,26,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar .brand-mark{width:34px;height:34px}
.topbar .brand-text strong{font-size:15.5px}
.topbar .brand-text em{display:none}
.nav-toggle{
  width:40px;height:40px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-b);
  color:var(--t1);font-size:16px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(20,201,163,.5);color:var(--brand-l)}
.nav-mask{
  display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:75;
  opacity:0;transition:opacity .26s var(--ease);
}
.nav-mask.show{display:block;opacity:1}

/* ============ 主区域 ============ */
.app-main{margin-left:var(--side-w);min-height:100vh;position:relative}

/* ============ 面包屑 ============ */
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
  padding:22px 0 0;
}
.crumb a{color:var(--t2)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--t3);opacity:.6}
.crumb .cur{color:var(--t3)}

/* ============ Hero ============ */
.hero{position:relative;padding:34px 0 72px;border-bottom:1px solid var(--line);overflow:hidden}
.hero-glow{
  position:absolute;top:-190px;right:-140px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,201,163,.12),rgba(20,201,163,0) 68%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center;
  margin-top:24px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:26px;padding:0 12px;
  border-radius:var(--r-badge);
  background:rgba(20,201,163,.08);
  border:1px solid rgba(20,201,163,.28);
  color:var(--brand-l);font-size:12px;letter-spacing:.04em;
  margin-bottom:18px;
}
.hero h1{
  font-size:clamp(28px,4.2vw,42px);
  line-height:1.24;margin-bottom:16px;
}
.hero h1 span{color:var(--brand-l)}
.hero-sub{font-size:16px;line-height:1.8;max-width:560px;margin-bottom:26px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.btn-main{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);border:0;
  background:var(--brand);color:#04211B;font-weight:700;font-size:15px;
  box-shadow:0 0 0 1px rgba(20,201,163,.35), inset 0 1px 0 rgba(255,255,255,.35);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.btn-main:hover{
  color:#04211B;background:#1BDCB4;transform:translateY(-1px);
  box-shadow:0 0 24px rgba(20,201,163,.45);
}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--glass-b);
  color:var(--t1);font-weight:600;font-size:15px;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.btn-ghost:hover{border-color:rgba(20,201,163,.6);color:var(--brand-l);background:rgba(20,201,163,.05)}
.badges{display:flex;flex-wrap:wrap;gap:28px}
.badge-item{border-left:1px solid var(--line);padding-left:16px}
.badge-item:first-child{border-left:0;padding-left:0}
.badge-item b{display:block;font-size:24px;color:var(--t1);font-weight:800;line-height:1.2}
.badge-item span{font-size:13px;color:var(--t3)}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
  aspect-ratio:16/10;box-shadow:var(--shadow-card);
}
.hero-media img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(150deg,rgba(6,10,18,0) 38%,rgba(6,10,18,.86) 100%);
}
.hero-media:hover img{transform:scale(1.04)}

/* ============ 通用板块 ============ */
.section{padding:88px 0;border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.1em;color:var(--brand-l);
  text-transform:uppercase;margin-bottom:12px;
}
.section-head .kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand)}
.section-head h2{font-size:clamp(22px,2.6vw,31px);margin-bottom:12px}
.section-head p{font-size:15px;color:var(--t2);max-width:640px}

/* ============ 交替图文行 ============ */
.alt-list{display:flex;flex-direction:column}
.alt-row{
  display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;
  padding:46px 0;
  border-bottom:1px dashed var(--line);
}
.alt-row:first-child{padding-top:0}
.alt-row:last-child{border-bottom:0;padding-bottom:0}
.alt-row.rev .alt-media{order:2}
.alt-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
  aspect-ratio:16/10;box-shadow:var(--shadow-soft);
}
.alt-media img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.alt-media:hover img{transform:scale(1.04)}
.alt-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;
  border:1px solid rgba(242,181,68,.4);
  color:var(--amber);font-size:13px;font-weight:700;
  margin-bottom:14px;
}
.alt-body h3{font-size:21px;margin-bottom:12px}
.alt-body p{font-size:15px;line-height:1.85;margin-bottom:16px}
.tick-list{display:flex;flex-direction:column;gap:9px}
.tick-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--t2)}
.tick-list li i{color:var(--brand);font-size:13px;margin-top:6px;flex:none}
.tick-list.amber li i{color:var(--amber)}

/* ============ 材料清单 ============ */
.material-block{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:38px 40px;
}
.material-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:14px 44px;margin-top:26px;
}
.material-grid li{
  display:flex;align-items:flex-start;gap:12px;
  padding:13px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;color:var(--t2);
  transition:background .2s var(--ease);
}
.material-grid li:hover{background:rgba(255,255,255,.02)}
.material-grid li:last-child,.material-grid li:nth-last-child(2){border-bottom:0}
.material-grid li i{color:var(--brand);margin-top:6px;font-size:13px;flex:none}
.material-note{
  margin-top:26px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--t3);display:flex;gap:10px;align-items:flex-start;
}
.material-note i{color:var(--amber);margin-top:5px}

/* ============ FAQ ============ */
.faq-wrap{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.faq-icon{
  display:inline-grid;place-items:center;
  width:20px;height:20px;border-radius:50%;
  background:rgba(20,201,163,.12);color:var(--brand);
  font-size:12px;margin-right:10px;font-weight:800;
}
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-width:0;--bs-accordion-border-radius:0;--bs-accordion-inner-border-radius:0;--bs-accordion-btn-focus-box-shadow:none}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.accordion-item:last-child{border-bottom:0}
.accordion-button{
  background:transparent;color:var(--t1);
  font-size:16px;font-weight:700;
  padding:22px 8px 22px 0;
  display:flex;align-items:center;
  box-shadow:none;
}
.accordion-button:not(.collapsed){color:var(--brand-l);background:transparent;box-shadow:none}
.accordion-button::after{
  content:"+";
  background-image:none;
  font-size:19px;color:var(--t3);font-weight:400;
  width:auto;height:auto;
  display:grid;place-items:center;
  transition:color .2s var(--ease),transform .25s var(--ease);
  margin-left:auto;
}
.accordion-button:not(.collapsed)::after{content:"−";color:var(--brand);transform:rotate(180deg)}
.accordion-body{
  padding:0 0 26px;
  font-size:15px;line-height:1.85;color:var(--t2);
  border-left:0;
}
.accordion-item:has(.accordion-button:not(.collapsed)){position:relative}
.accordion-item:has(.accordion-button:not(.collapsed))::before{
  content:"";position:absolute;left:-18px;top:20px;bottom:20px;width:3px;border-radius:3px;background:var(--brand);
}

/* ============ CTA ============ */
.cta-section{padding:88px 0 96px}
.cta-card{
  position:relative;overflow:hidden;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:46px 48px;
  display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;
  box-shadow:var(--shadow-card);
}
.cta-card::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:560px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,201,163,.14),rgba(20,201,163,0) 70%);
  pointer-events:none;
}
.cta-card > *{position:relative;z-index:2}
.cta-card h2{font-size:clamp(21px,2.4vw,28px);margin-bottom:12px}
.cta-card p{font-size:15px;max-width:620px}
.cta-hint{display:flex;flex-wrap:wrap;gap:22px;margin-top:22px;font-size:13px;color:var(--t3)}
.cta-hint span{display:inline-flex;align-items:center;gap:7px}
.cta-hint i{color:var(--brand);font-size:12px}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:80;
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-b);
  color:var(--t1);font-size:15px;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .26s var(--ease),transform .26s var(--ease),box-shadow .26s var(--ease),color .26s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--brand);box-shadow:0 0 24px rgba(20,201,163,.4);border-color:rgba(20,201,163,.5)}

/* ============ 页脚 ============ */
.site-footer{margin-top:0;background:var(--bg-1);border-top:1px solid var(--line)}
.footer-grid{
  display:grid;grid-template-columns:1.65fr 1fr 1fr 1fr;gap:36px;
  padding:58px 0 42px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:13.5px;color:var(--t3);max-width:330px;line-height:1.8}
.footer-contact{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  font-size:13.5px;color:var(--brand-l);
}
.footer-contact:hover{color:var(--brand)}
.footer-col h4{font-size:14px;color:var(--t1);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:13.5px;color:var(--t2)}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.footer-bar{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding:20px 0 26px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--t3);
}
.footer-bar a{color:var(--t3)}
.footer-bar a:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  :root{--side-w:72px}
  .app-side{padding:22px 12px 18px;align-items:center}
  .brand{justify-content:center}
  .brand-text{display:none}
  .side-link{justify-content:center;padding:12px 0;width:100%}
  .side-link span{display:none}
  .side-link.active::before{top:8px;bottom:8px}
  .side-cta{padding:12px 0;width:100%}
  .side-cta span{display:none}
  .side-tip{display:none}
  .hero-grid{gap:38px}
  .alt-row{gap:38px}
}
@media (max-width:991.98px){
  .app-side{
    width:78vw;max-width:320px;
    padding:22px 18px;
    align-items:stretch;
    transform:translateX(-102%);
    transition:transform .3s var(--ease);
    z-index:85;
    box-shadow:24px 0 60px -30px rgba(0,0,0,.95);
  }
  .app-side.open{transform:translateX(0)}
  .app-side .brand{justify-content:flex-start}
  .app-side .brand-text{display:flex}
  .app-side .side-link{justify-content:flex-start;padding:12px 14px;height:48px;font-size:15px}
  .app-side .side-link span{display:inline}
  .app-side .side-cta{padding:12px 14px}
  .app-side .side-cta span{display:inline}
  .app-side .side-tip{display:block}
  .topbar{display:flex}
  .app-main{margin-left:0}
  .shell{padding:0 24px}
  .hero{padding:16px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{aspect-ratio:16/10}
  .section{padding:64px 0}
  .alt-row{grid-template-columns:1fr;gap:24px;padding:36px 0}
  .alt-row.rev .alt-media{order:0}
  .material-block{padding:30px 24px}
  .material-grid{grid-template-columns:1fr;gap:0}
  .material-grid li:nth-last-child(2){border-bottom:1px solid var(--line)}
  .cta-card{grid-template-columns:1fr;gap:26px;padding:34px 26px}
  .cta-section{padding:64px 0 72px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;padding:44px 0 32px}
  .footer-brand{grid-column:1 / -1}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:575.98px){
  .shell{padding:0 16px}
  .hero h1{font-size:26px}
  .hero-sub{font-size:15px}
  .btn-row{flex-direction:column;gap:10px}
  .btn-main,.btn-ghost{width:100%;justify-content:center}
  .badges{gap:20px}
  .badge-item b{font-size:22px}
  .section-head h2{font-size:22px}
  .alt-body h3{font-size:19px}
  .accordion-button{font-size:15px;padding:18px 4px 18px 0}
  .cta-hint{flex-direction:column;gap:10px}
  .footer-bar{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#121B2B;
  --brand:#14C9A3;
  --brand-d:#0B8F76;
  --brand-l:#6BE7C9;
  --amber:#F2B544;
  --rose:#FF6B8A;
  --t1:#EAF1F8;
  --t2:#A6B6C9;
  --t3:#6F8199;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --glass-b:rgba(255,255,255,.10);
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:12px;
  --sh:0 18px 48px -24px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  --sh-soft:0 12px 32px -20px rgba(0,0,0,.85);
  --nav-w:248px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--t2);
  --bs-border-color:var(--line);
  --bs-link-color:var(--brand);
  --bs-link-hover-color:var(--brand-l);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;object-fit:cover;background:var(--bg-2);}
a{color:var(--brand);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--brand-l);}
h1,h2,h3,h4{color:var(--t1);font-weight:800;letter-spacing:-.01em;line-height:1.3;margin:0;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container-x{width:100%;max-width:1280px;margin:0 auto;padding:0 32px;}

/* ---------- 侧栏导航 ---------- */
.side-nav{
  position:fixed;inset:0 auto 0 0;width:var(--nav-w);
  background:linear-gradient(180deg,#0A1018 0%,#070C14 100%);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:6px;
  padding:22px 16px 18px;z-index:60;
}
.side-brand{display:flex;align-items:center;gap:11px;padding:6px 8px 18px;color:var(--brand);}
.brand-mark{display:inline-flex;color:var(--brand);}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{color:var(--t1);font-size:17px;font-weight:800;letter-spacing:.02em;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--t3);letter-spacing:.06em;}
.side-nav .nav-label{font-size:11.5px;color:var(--t3);letter-spacing:.16em;padding:6px 12px 8px;text-transform:uppercase;}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:10px;color:var(--t2);
  font-size:14.5px;line-height:1.4;border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.side-link i{width:20px;text-align:center;font-size:15px;color:var(--t3);transition:color .22s var(--ease);}
.side-link span{flex:1;}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--t1);}
.side-link:hover i{color:var(--brand-l);}
.side-link.active{
  background:var(--glass);border-color:var(--glass-b);color:var(--t1);
  box-shadow:0 0 0 1px rgba(20,201,163,.18),0 8px 26px -18px rgba(20,201,163,.55);
}
.side-link.active i{color:var(--brand);}
.side-link.active::before{
  content:"";position:absolute;left:-16px;top:10px;bottom:10px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.side-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;padding:12px 14px;border-radius:var(--r-btn);
  background:var(--brand);color:#04211B;font-weight:700;font-size:14.5px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 0 0 1px rgba(20,201,163,.2);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.side-cta:hover{background:var(--brand-l);color:#04211B;transform:translateY(-1px);box-shadow:0 0 24px rgba(20,201,163,.45);}
.side-tip{font-size:12px;color:var(--t3);margin:12px 4px 0;line-height:1.6;}

/* ---------- 顶部栏（移动端） ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:80;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(8,13,22,.88);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar .brand{display:flex;align-items:center;gap:10px;color:var(--brand);}
.hamb{
  width:42px;height:42px;border-radius:10px;border:1px solid var(--glass-b);
  background:var(--glass);color:var(--t1);display:grid;place-items:center;cursor:pointer;
}
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;pointer-events:none;
  transition:opacity .26s var(--ease);z-index:90;
}
.drawer{
  position:fixed;top:0;bottom:0;left:0;width:78vw;max-width:320px;z-index:95;
  background:#080D16;border-right:1px solid var(--line);
  transform:translateX(-102%);transition:transform .3s var(--ease);
  padding:18px 14px;display:flex;flex-direction:column;gap:4px;overflow-y:auto;
}
body.drawer-open .drawer{transform:translateX(0);}
body.drawer-open .drawer-mask{opacity:1;pointer-events:auto;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:4px 6px 16px;border-bottom:1px solid var(--line);margin-bottom:12px;}
.drawer .side-link{padding:13px 12px;font-size:15px;min-height:48px;}
.drawer .side-link.active::before{left:-14px;}

/* ---------- 主区域 ---------- */
.shell{margin-left:var(--nav-w);}
main{display:block;}
section{position:relative;}

/* ---------- 窄幅横幅 Hero ---------- */
.page-hero{
  position:relative;min-height:280px;display:flex;align-items:flex-end;
  border-bottom:1px solid var(--line);overflow:hidden;padding:56px 0 40px;
}
.page-hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  filter:saturate(.9);
}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(6,10,18,.97) 0%,rgba(6,10,18,.80) 48%,rgba(6,10,18,.46) 100%),
    linear-gradient(180deg,rgba(6,10,18,.42) 0%,rgba(6,10,18,.94) 100%);
}
.page-hero .container-x{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:16px;}
.crumbs a{color:var(--t2);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:var(--t3);}
.crumbs .now{color:var(--t3);}
.page-hero h1{font-size:clamp(28px,4.6vw,44px);max-width:760px;}
.page-hero .lede{max-width:720px;margin-top:14px;font-size:16px;color:var(--t2);}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}

/* ---------- 按钮 ---------- */
.btn-brand,.btn-line,.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;cursor:pointer;border-radius:var(--r-btn);transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);}
.btn-brand{
  padding:12px 22px;background:var(--brand);color:#04211B;font-size:15px;border:1px solid transparent;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 0 0 1px rgba(20,201,163,.22);
}
.btn-brand:hover{background:var(--brand-l);color:#04211B;transform:translateY(-1px);box-shadow:0 0 24px rgba(20,201,163,.5);}
.btn-line{
  padding:12px 22px;background:transparent;color:var(--t1);font-size:15px;border:1px solid var(--glass-b);
}
.btn-line:hover{border-color:var(--brand);color:var(--brand-l);transform:translateY(-1px);}
.btn-text{padding:6px 2px;color:var(--brand);font-size:14px;border-radius:6px;}
.btn-text:hover{color:var(--brand-l);text-decoration:underline;text-underline-offset:3px;}

/* ---------- 徽章 ---------- */
.badge-x{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 11px;border-radius:var(--r-pill);font-size:12px;font-weight:700;line-height:1;}
.badge-brand{background:rgba(20,201,163,.10);color:var(--brand-l);border:1px solid rgba(20,201,163,.32);}
.badge-amber{background:rgba(242,181,68,.10);color:var(--amber);border:1px solid rgba(242,181,68,.32);}
.badge-rose{background:rgba(255,107,138,.10);color:var(--rose);border:1px solid rgba(255,107,138,.32);}
.badge-plain{background:var(--glass);color:var(--t2);border:1px solid var(--glass-b);}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,3vw,32px);}
.section-head p{margin-top:12px;color:var(--t2);font-size:15.5px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;color:var(--brand-l);text-transform:uppercase;margin-bottom:14px;}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:inline-block;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 指标条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px;}
.metric{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 22px;box-shadow:var(--sh-soft);
}
.metric .num{font-size:26px;font-weight:800;color:var(--t1);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}
.metric .num em{font-style:normal;font-size:14px;color:var(--t3);font-weight:600;margin-left:4px;}
.metric .cap{font-size:13.5px;color:var(--t3);margin-top:4px;}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:8px;padding-left:44px;}
.timeline::before{
  content:"";position:absolute;left:15px;top:8px;bottom:8px;width:1px;background:linear-gradient(180deg,rgba(242,181,68,.55),rgba(242,181,68,.06));
}
.tl-item{position:relative;padding:0 0 34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;left:-44px;top:2px;width:32px;height:32px;border-radius:50%;
  display:grid;place-items:center;font-size:13px;font-weight:800;
  color:var(--amber);background:#0C1119;border:1px solid rgba(242,181,68,.55);
  box-shadow:0 0 0 5px rgba(6,10,18,1);font-variant-numeric:tabular-nums;
}
.tl-card{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 24px;transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.tl-card:hover{border-color:rgba(20,201,163,.34);transform:translateY(-2px);}
.tl-card h3{font-size:20px;margin-bottom:8px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tl-card p{margin:0;font-size:15px;color:var(--t2);}
.tl-meta{margin-top:12px;display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--t3);}
.tl-meta span{display:inline-flex;align-items:center;gap:6px;}

/* ---------- 两栏对照 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:8px;}
.cmp-col{border-radius:var(--r-card);padding:26px 26px 22px;border:1px solid var(--line);background:var(--bg-1);}
.cmp-col.plain{background:#0A0F18;}
.cmp-col.member{
  border-color:rgba(20,201,163,.30);
  background:linear-gradient(180deg,rgba(20,201,163,.06),rgba(11,18,32,1) 46%);
  box-shadow:0 0 0 1px rgba(20,201,163,.10),0 22px 50px -34px rgba(20,201,163,.6);
}
.cmp-head{display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:18px;}
.cmp-head .ico{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-size:16px;}
.cmp-col.plain .ico{background:rgba(255,255,255,.05);color:var(--t3);border:1px solid var(--line);}
.cmp-col.member .ico{background:rgba(20,201,163,.12);color:var(--brand);border:1px solid rgba(20,201,163,.3);}
.cmp-head h3{font-size:19px;}
.cmp-head .sub{font-size:12.5px;color:var(--t3);}
.cmp-list li{display:flex;gap:12px;padding:13px 0;border-bottom:1px dashed rgba(255,255,255,.06);font-size:14.8px;line-height:1.7;}
.cmp-list li:last-child{border-bottom:0;}
.cmp-list i{margin-top:5px;font-size:14px;flex:0 0 auto;}
.cmp-col.plain .cmp-list i{color:var(--t3);}
.cmp-col.member .cmp-list i{color:var(--brand);}
.cmp-list b{color:var(--t1);font-weight:700;}

/* ---------- 图文块 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;}
.split .media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh);}
.split .media img{width:100%;aspect-ratio:16/10;transition:transform .5s var(--ease);}
.split .media:hover img{transform:scale(1.04);}
.split h2{font-size:clamp(24px,3vw,32px);margin-bottom:14px;}
.split p{font-size:15.5px;}
.tick-list{margin-top:20px;display:grid;gap:12px;}
.tick-list li{display:flex;gap:11px;font-size:14.8px;color:var(--t2);}
.tick-list i{color:var(--brand);margin-top:5px;font-size:13px;}

/* ---------- FAQ ---------- */
.faq-wrap{margin-top:8px;background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;}
.faq-titlebar{display:flex;align-items:center;gap:12px;padding:20px 24px;border-bottom:1px solid var(--line);}
.faq-titlebar .q-ico{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:rgba(20,201,163,.12);color:var(--brand);border:1px solid rgba(20,201,163,.28);font-size:14px;}
.faq-titlebar h2{font-size:20px;}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.accordion-item:last-child{border-bottom:0;}
.accordion-button{
  background:transparent;color:var(--t1);font-size:16px;font-weight:700;
  padding:20px 24px;box-shadow:none;border:0;border-radius:0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.accordion-button:not(.collapsed){color:var(--brand-l);background:transparent;box-shadow:none;}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-4px;}
.accordion-button::after{display:none;}
.accordion-button .sign{
  width:26px;height:26px;flex:0 0 auto;border-radius:8px;display:grid;place-items:center;
  border:1px solid var(--glass-b);color:var(--t2);font-size:13px;
  transition:transform .26s var(--ease),color .26s var(--ease),border-color .26s var(--ease);
}
.accordion-button:not(.collapsed) .sign{transform:rotate(90deg);color:var(--brand);border-color:rgba(20,201,163,.4);}
.accordion-body{padding:0 24px 22px 24px;font-size:15px;line-height:1.85;color:var(--t2);border-left:3px solid transparent;}
.accordion-button:not(.collapsed)+.accordion-collapse .accordion-body{border-left-color:var(--brand);}

/* ---------- 末尾 CTA ---------- */
.cta-card{
  position:relative;overflow:hidden;border-radius:20px;border:1px solid var(--glass-b);
  background:linear-gradient(120deg,#0B1220 0%,#0E1A24 100%);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh);
}
.cta-card::after{
  content:"";position:absolute;left:50%;top:50%;width:640px;height:320px;transform:translate(-50%,-50%);
  background:radial-gradient(closest-side,rgba(20,201,163,.14),transparent 72%);pointer-events:none;
}
.cta-card .cta-copy{position:relative;z-index:2;max-width:660px;}
.cta-card h2{font-size:clamp(22px,2.6vw,28px);}
.cta-card p{margin:10px 0 0;font-size:15px;color:var(--t2);}
.cta-card .cta-act{position:relative;z-index:2;display:flex;gap:12px;flex-wrap:wrap;}
.cta-notes{margin-top:18px;display:flex;flex-wrap:wrap;gap:22px;font-size:13px;color:var(--t3);}
.cta-notes span{display:inline-flex;align-items:center;gap:7px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:60px 0 40px;}
.footer-brand .brand{display:flex;align-items:center;gap:11px;color:var(--brand);margin-bottom:16px;}
.footer-brand p{font-size:13.5px;color:var(--t2);max-width:320px;}
.footer-contact{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--brand);margin-top:4px;}
.footer-contact:hover{color:var(--brand-l);text-decoration:underline;text-underline-offset:3px;}
.footer-col h4{font-size:14px;color:var(--t1);margin-bottom:16px;letter-spacing:.02em;}
.footer-col li{margin-bottom:11px;}
.footer-col a{font-size:13.8px;color:var(--t2);}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.footer-bar{
  border-top:1px solid var(--line);padding:20px 0 28px;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--t3);
}
.footer-bar a{color:var(--t3);}
.footer-bar a:hover{color:var(--brand);}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:24px;width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;background:rgba(255,255,255,.06);backdrop-filter:blur(12px);
  border:1px solid var(--glass-b);color:var(--t1);z-index:70;opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease),box-shadow .28s var(--ease),transform .28s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{box-shadow:0 0 22px rgba(20,201,163,.45);color:var(--brand-l);transform:translateY(-2px);}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .container-x{max-width:1180px;}
}
@media (max-width:1199px){
  :root{--nav-w:72px;}
  .side-nav{padding:18px 10px;align-items:center;}
  .side-brand{padding:6px 0 16px;}
  .brand-text,.side-tip,.side-nav .nav-label{display:none;}
  .side-link{justify-content:center;padding:12px 0;font-size:13px;}
  .side-link span{display:none;}
  .side-link i{font-size:17px;}
  .side-link.active::before{left:-10px;}
  .side-cta span{display:none;}
  .side-cta{padding:12px 0;}
  .container-x{padding:0 24px;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
}
@media (max-width:991px){
  .side-nav{display:none;}
  .topbar{display:flex;}
  .shell{margin-left:0;padding-top:60px;}
  .container-x{padding:0 20px;}
  .section{padding:64px 0;}
  .page-hero{padding:40px 0 34px;min-height:250px;}
  .split{grid-template-columns:1fr;gap:26px;}
  .compare{grid-template-columns:1fr;}
  .cta-card{flex-direction:column;align-items:flex-start;padding:32px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding:44px 0 30px;}
  .timeline{padding-left:38px;}
  .tl-dot{left:-38px;width:28px;height:28px;font-size:12px;}
  .timeline::before{left:13px;}
}
@media (max-width:575px){
  body{font-size:15px;}
  .container-x{padding:0 16px;}
  .section{padding:56px 0;}
  .page-hero h1{font-size:26px;}
  .metrics{grid-template-columns:1fr;gap:12px;}
  .hero-actions .btn-brand,.hero-actions .btn-line{width:100%;}
  .cta-card .cta-act{width:100%;}
  .cta-card .cta-act .btn-brand,.cta-card .cta-act .btn-line{width:100%;}
  .tl-card{padding:18px 18px;}
  .cmp-col{padding:20px 18px;}
  .accordion-button{padding:16px 18px;font-size:15px;}
  .accordion-body{padding:0 18px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:22px;}
  .footer-bar{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#121B2B;
  --brand:#14C9A3;
  --brand-d:#0B8F76;
  --brand-l:#6BE7C9;
  --amber:#F2B544;
  --rose:#FF6B8A;
  --t1:#EAF1F8;
  --t2:#A6B6C9;
  --t3:#6F8199;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(255,255,255,.10);
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --shadow:0 18px 48px -24px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --side:248px;

  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--t2);
  --bs-primary:var(--brand);
  --bs-border-color:var(--line);
  --bs-border-radius:12px;
  --bs-link-color:var(--brand-l);
  --bs-link-hover-color:var(--brand);
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC","Inter",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Inter",system-ui,-apple-system,sans-serif;
  font-size:15.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand-l);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--brand);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{color:var(--t1);font-weight:800;letter-spacing:-.01em;margin:0;line-height:1.3;}
p{margin:0;}
ul{list-style:none;margin:0;padding:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.num{font-family:"Inter","SFMono-Regular",ui-monospace,monospace;font-variant-numeric:tabular-nums;}

/* ============ 侧栏外壳 ============ */
.sidebar{
  position:fixed;inset:0 auto 0 0;width:var(--side);
  background:linear-gradient(180deg,#0A111E 0%,#070C16 100%);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:22px 16px 18px;
  z-index:1040;
  transition:transform .28s var(--ease),width .28s var(--ease);
}
.side-head{padding:4px 8px 18px;border-bottom:1px solid var(--line);}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:grid;place-items:center;
  color:var(--brand);
  background:radial-gradient(circle at 30% 20%,rgba(20,201,163,.22),rgba(20,201,163,.04));
  border:1px solid rgba(20,201,163,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{color:var(--t1);font-size:17px;font-weight:800;letter-spacing:.02em;}
.brand-text em{color:var(--t3);font-size:12px;font-style:normal;letter-spacing:.06em;}
.side-nav{display:flex;flex-direction:column;gap:6px;margin-top:20px;flex:1 1 auto;overflow-y:auto;}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:10px;
  color:var(--t2);font-size:14.5px;
  border:1px solid transparent;
  transition:all .22s var(--ease);
}
.side-link i{width:20px;text-align:center;font-size:15px;color:var(--t3);transition:color .22s var(--ease);}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--t1);}
.side-link:hover i{color:var(--brand-l);}
.side-link.active{
  background:var(--glass);border-color:var(--glass-line);color:var(--t1);
  box-shadow:0 0 0 1px rgba(20,201,163,.18),0 12px 30px -22px rgba(20,201,163,.9);
}
.side-link.active i{color:var(--brand);}
.side-link.active::before{
  content:"";position:absolute;left:-1px;top:9px;bottom:9px;width:3px;
  border-radius:3px;background:var(--brand);
}
.side-foot{margin-top:16px;padding-top:16px;border-top:1px solid var(--line);}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  width:100%;padding:12px 18px;border-radius:var(--r-btn);border:0;
  background:var(--brand);color:#04211A;font-weight:800;font-size:14.5px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 0 0 1px rgba(20,201,163,.2);
  transition:all .24s var(--ease);cursor:pointer;
}
.btn-main:hover{background:#19DBB2;color:#04211A;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(20,201,163,.45),0 0 24px rgba(20,201,163,.35);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--glass-line);color:var(--t1);
  font-weight:700;font-size:14.5px;transition:all .24s var(--ease);cursor:pointer;
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-l);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand-l);
  font-weight:700;font-size:14px;border:0;background:none;padding:0;
}
.btn-text:hover{text-decoration:underline;text-underline-offset:3px;color:var(--brand);}

/* 顶部栏（移动端） */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1050;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(9,14,24,.86);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.burger{
  width:42px;height:42px;border-radius:10px;border:1px solid var(--glass-line);
  background:var(--glass);color:var(--t1);font-size:17px;display:grid;place-items:center;
}
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:1035;opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer-mask.show{opacity:1;visibility:visible;}

/* ============ 主内容容器 ============ */
.shell{margin-left:var(--side);padding:0 32px;}
.shell > *{max-width:1280px;margin-left:auto;margin-right:auto;}
main{padding-bottom:8px;}

/* ============ 面包屑 ============ */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);padding:26px 0 4px;flex-wrap:wrap;}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#3A4759;}
.crumb .now{color:var(--t3);}

/* ============ Hero ============ */
.hero{
  position:relative;margin-top:18px;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(6,10,18,.42) 0%,rgba(6,10,18,.86) 62%,rgba(6,10,18,.97) 100%),
    url('/assets/images/backpic/back-2.png') center 28%/cover no-repeat;
  padding:74px 32px 66px;text-align:center;
  box-shadow:var(--shadow);
}
.hero::after{
  content:"";position:absolute;top:-140px;right:-80px;width:520px;height:520px;pointer-events:none;
  background:radial-gradient(circle,rgba(20,201,163,.12),rgba(20,201,163,0) 68%);
}
.hero-inner{position:relative;z-index:2;max-width:820px;margin:0 auto;}
.tagline{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(20,201,163,.08);border:1px solid rgba(20,201,163,.28);
  color:var(--brand-l);font-size:12.5px;letter-spacing:.04em;margin-bottom:20px;
}
.hero h1{font-size:clamp(28px,4.2vw,42px);line-height:1.28;margin-bottom:18px;}
.hero h1 span{color:var(--brand-l);}
.hero p.lead{font-size:16px;color:var(--t2);max-width:660px;margin:0 auto 26px;line-height:1.85;}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.hero-actions .btn-main,.hero-actions .btn-ghost{width:auto;min-width:158px;}

/* ============ 指标 ============ */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:36px;
}
.stat{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 20px;transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.stat:hover{border-color:rgba(20,201,163,.35);transform:translateY(-2px);}
.stat b{display:block;font-size:26px;color:var(--t1);font-weight:800;}
.stat b i{font-size:14px;color:var(--t3);font-style:normal;margin-left:4px;font-weight:600;}
.stat span{display:block;font-size:13.5px;color:var(--t3);margin-top:6px;}

/* ============ 板块头 ============ */
.section{padding:76px 0 0;}
.sec-head{max-width:720px;margin-bottom:30px;}
.sec-head .kicker{
  display:inline-block;font-size:12.5px;letter-spacing:.14em;color:var(--brand);
  text-transform:uppercase;margin-bottom:10px;
}
.sec-head h2{font-size:clamp(24px,3vw,31px);margin-bottom:12px;}
.sec-head p{font-size:15px;color:var(--t2);}

/* ============ 错落网格 ============ */
.mosaic{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;align-items:start;}
.m-card{
  position:relative;background:var(--bg-1);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.m-card:hover{transform:translateY(-3px);border-color:rgba(20,201,163,.34);box-shadow:0 22px 46px -30px rgba(0,0,0,.95);}
.m-card .thumb{position:relative;overflow:hidden;background:var(--bg-2);}
.m-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease);}
.m-card:hover .thumb img{transform:scale(1.04);}
.m-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.m-card h3{font-size:19px;}
.m-card p{font-size:14.5px;color:var(--t2);line-height:1.78;}
.m-card .foot{margin-top:auto;padding-top:8px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:23px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.02em;
}
.badge-brand{background:rgba(20,201,163,.1);color:var(--brand-l);border:1px solid rgba(20,201,163,.3);}
.badge-amber{background:rgba(242,181,68,.1);color:var(--amber);border:1px solid rgba(242,181,68,.3);}
.badge-rose{background:rgba(255,107,138,.1);color:var(--rose);border:1px solid rgba(255,107,138,.32);}
.m-1{grid-column:span 4;}
.m-1 .thumb{height:230px;}
.m-2{grid-column:span 2;}
.m-2 .thumb{height:150px;}
.m-3{grid-column:span 2;}
.m-3 .thumb{height:168px;}
.m-4{grid-column:span 4;}
.m-4 .thumb{height:196px;}
.m-5{grid-column:span 3;}
.m-5 .thumb{height:176px;}
.m-6{grid-column:span 3;}
.m-6 .thumb{height:176px;}

/* ============ 权限档位列表 ============ */
.tier-list{border-top:1px solid var(--line);}
.tier{
  display:grid;grid-template-columns:130px 1fr auto;gap:20px;align-items:center;
  padding:20px 16px;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),border-color .24s var(--ease);
  position:relative;
}
.tier::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity .24s var(--ease);
}
.tier:hover{background:rgba(255,255,255,.035);}
.tier:hover::before{opacity:1;}
.tier .t-name{display:flex;align-items:center;gap:10px;color:var(--t1);font-weight:800;font-size:16px;}
.tier .dot{width:9px;height:9px;border-radius:50%;background:var(--line);flex:0 0 9px;}
.tier .dot.b{background:var(--brand);box-shadow:0 0 12px rgba(20,201,163,.7);}
.tier .dot.a{background:var(--amber);box-shadow:0 0 12px rgba(242,181,68,.6);}
.tier .dot.r{background:linear-gradient(135deg,var(--amber),var(--rose));box-shadow:0 0 12px rgba(255,107,138,.5);}
.tier .t-desc{font-size:14.5px;color:var(--t2);line-height:1.8;}
.tier .t-desc b{color:var(--t1);font-weight:700;}
.tier .t-meta{font-size:13px;color:var(--t3);white-space:nowrap;}

/* ============ 两种观看方式 ============ */
.ways{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.way{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 26px 24px;
}
.way h3{font-size:20px;margin-bottom:8px;}
.way .sub{font-size:13.5px;color:var(--t3);margin-bottom:18px;}
.way ul{display:flex;flex-direction:column;gap:12px;}
.way li{display:flex;gap:10px;font-size:14.5px;color:var(--t2);line-height:1.8;}
.way li i{color:var(--brand);margin-top:6px;font-size:12px;}

/* ============ FAQ ============ */
.faq-wrap{background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;}
.faq-head{display:flex;align-items:center;gap:12px;padding:24px 26px 18px;border-bottom:1px solid var(--line);}
.faq-head i{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:13px;color:var(--brand);border:1px solid rgba(20,201,163,.35);background:rgba(20,201,163,.08);}
.faq-head h2{font-size:21px;}
.accordion-button{
  background:transparent;color:var(--t1);font-weight:700;font-size:16px;
  padding:20px 26px;box-shadow:none;border-radius:0;
}
.accordion-button:not(.collapsed){color:var(--brand-l);background:rgba(20,201,163,.05);box-shadow:inset 3px 0 0 var(--brand);}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button::after{
  content:"+";background-image:none;transform:none;
  font-size:20px;line-height:1;color:var(--brand);width:24px;height:24px;
  display:grid;place-items:center;font-weight:400;
}
.accordion-button:not(.collapsed)::after{content:"－";transform:none;color:var(--brand-l);}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.accordion-item:last-child{border-bottom:0;}
.accordion-body{padding:0 26px 22px 26px;font-size:15px;line-height:1.85;color:var(--t2);}

/* ============ CTA ============ */
.cta{
  position:relative;overflow:hidden;margin-top:76px;
  border:1px solid var(--glass-line);border-radius:20px;
  background:linear-gradient(120deg,rgba(18,27,43,.92),rgba(11,18,32,.96));
  padding:38px 36px;display:flex;align-items:center;gap:28px;justify-content:space-between;
  box-shadow:var(--shadow);
}
.cta::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:680px;height:340px;pointer-events:none;
  background:radial-gradient(ellipse,rgba(20,201,163,.12),rgba(20,201,163,0) 70%);
}
.cta .cta-txt{position:relative;z-index:2;max-width:660px;}
.cta h2{font-size:clamp(22px,2.6vw,28px);margin-bottom:10px;}
.cta p{font-size:15px;color:var(--t2);}
.cta .cta-act{position:relative;z-index:2;display:flex;gap:12px;flex-wrap:wrap;}
.cta-note{display:flex;gap:22px;flex-wrap:wrap;margin-top:14px;font-size:13px;color:var(--t3);}
.cta-note span{display:inline-flex;align-items:center;gap:6px;}
.cta-note i{color:var(--brand);font-size:11px;}

/* ============ 页脚 ============ */
.site-footer{margin-top:88px;background:var(--bg-1);border-top:1px solid var(--line);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding:52px 0 38px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:13.5px;color:var(--t3);line-height:1.85;max-width:330px;}
.footer-contact{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:13.5px;
  color:var(--brand-l);font-weight:700;
}
.footer-col h4{font-size:14px;color:var(--t1);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:var(--t2);font-size:14px;}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.footer-bar{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding:18px 0 26px;border-top:1px solid var(--line);font-size:13px;color:var(--t3);
}
.footer-bar a{color:var(--t3);}
.footer-bar a:hover{color:var(--brand-l);}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;z-index:1030;
  background:rgba(255,255,255,.06);border:1px solid var(--glass-line);
  backdrop-filter:blur(12px);color:var(--t1);opacity:0;visibility:hidden;
  transition:all .28s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{border-color:var(--brand);color:var(--brand-l);box-shadow:0 0 20px rgba(20,201,163,.35);}

/* ============ 响应式 ============ */
@media (max-width:1399.98px){
  .shell > *{max-width:1180px;}
}
@media (max-width:1199.98px) and (min-width:992px){
  :root{--side:72px;}
  .sidebar{padding:18px 10px;}
  .side-head{padding:4px 0 16px;display:flex;justify-content:center;}
  .brand{justify-content:center;}
  .brand-text{display:none;}
  .side-link{justify-content:center;padding:12px 0;}
  .side-link span{display:none;}
  .side-link i{font-size:17px;}
  .side-cta{padding:12px 0;font-size:0;}
  .side-cta i{font-size:16px;}
  .shell{padding:0 24px;}
}
@media (max-width:991.98px){
  .topbar{display:flex;}
  .sidebar{width:78vw;max-width:320px;transform:translateX(-104%);padding:20px 16px;}
  .sidebar.open{transform:translateX(0);box-shadow:20px 0 60px -30px rgba(0,0,0,.9);}
  .side-link{height:48px;font-size:15px;}
  .shell{margin-left:0;padding:0 20px;}
  main{padding-top:60px;}
  .crumb{padding-top:20px;}
  .hero{padding:56px 22px 48px;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .mosaic{grid-template-columns:repeat(2,1fr);}
  .m-1,.m-2,.m-3,.m-4,.m-5,.m-6{grid-column:span 1;}
  .m-card .thumb{height:170px !important;}
  .ways{grid-template-columns:1fr;}
  .tier{grid-template-columns:1fr;gap:8px;align-items:start;}
  .tier .t-meta{white-space:normal;}
  .cta{flex-direction:column;align-items:flex-start;padding:30px 24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:40px 0 28px;}
}
@media (max-width:575.98px){
  body{font-size:15px;}
  .shell{padding:0 16px;}
  .hero{padding:46px 18px 40px;border-radius:16px;}
  .hero h1{font-size:26px;}
  .hero p.lead{font-size:15px;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;min-width:0;}
  .stats{grid-template-columns:1fr;gap:14px;}
  .mosaic{grid-template-columns:1fr;gap:16px;}
  .section{padding:56px 0 0;}
  .cta{margin-top:56px;}
  .cta .cta-act{width:100%;}
  .cta .cta-act .btn-main,.cta .cta-act .btn-ghost{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .accordion-button{padding:17px 18px;font-size:15px;}
  .accordion-body{padding:0 18px 18px;}
  .faq-head{padding:20px 18px 14px;}
  .to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category4 */
:root{
  --bg-0:#060A12;
  --bg-1:#0B1220;
  --bg-2:#121B2B;
  --brand:#14C9A3;
  --brand-deep:#0B8F76;
  --brand-light:#6BE7C9;
  --amber:#F2B544;
  --rose:#FF6B8A;
  --t1:#EAF1F8;
  --t2:#A6B6C9;
  --t3:#6F8199;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(255,255,255,.10);
  --r-card:16px;
  --r-btn:10px;
  --r-table:12px;
  --r-img:12px;
  --shadow-card:0 18px 48px -24px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --side-w:248px;

  --bs-body-bg:#060A12;
  --bs-body-color:#A6B6C9;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#6BE7C9;
  --bs-link-hover-color:#14C9A3;
  --bs-font-sans-serif:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-light);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--brand);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{color:var(--t1);margin:0;letter-spacing:-.01em;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.shell{max-width:1280px;margin:0 auto;padding:0 32px;}

/* ============ 侧栏 ============ */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--side-w);
  background:var(--bg-1);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:22px;padding:24px 16px;z-index:1045;
}
.sidebar .brand{display:flex;align-items:center;gap:11px;color:var(--t1);text-decoration:none;padding:2px 6px 20px;border-bottom:1px solid var(--line);}
.brand-mark{color:var(--brand);display:inline-flex;filter:drop-shadow(0 0 10px rgba(20,201,163,.35));}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16.5px;font-weight:800;letter-spacing:.02em;color:var(--t1);}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--t3);letter-spacing:.06em;margin-top:3px;}

.side-nav{display:flex;flex-direction:column;gap:4px;flex:1;}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:10px;color:var(--t2);
  font-size:14.5px;text-decoration:none;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.side-link i{width:18px;text-align:center;font-size:15px;color:var(--t3);transition:color .22s var(--ease);}
.side-link:hover{background:rgba(255,255,255,.05);color:var(--t1);}
.side-link:hover i{color:var(--brand-light);}
.side-link.active{
  background:var(--glass);color:var(--t1);font-weight:600;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 0 0 1px rgba(20,201,163,.20);
}
.side-link.active i{color:var(--brand);}
.side-link.active::before{
  content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--brand);
  box-shadow:0 0 12px rgba(20,201,163,.55);
}
.side-foot{border-top:1px solid var(--line);padding-top:18px;}

/* ============ 顶栏（移动） ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1050;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(11,18,32,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar .brand{padding:0;border:0;gap:9px;}
.topbar .brand-text strong{font-size:15.5px;}
.topbar .brand-text em{display:none;}
.menu-btn{
  width:42px;height:42px;border-radius:10px;border:1px solid var(--glass-line);
  background:var(--glass);color:var(--t1);display:inline-flex;align-items:center;justify-content:center;
  font-size:17px;cursor:pointer;transition:border-color .22s var(--ease),color .22s var(--ease);
}
.menu-btn:hover{border-color:var(--brand);color:var(--brand-light);}
.scrim{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:1040;
  opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);
}
.scrim.show{opacity:1;visibility:visible;}

/* ============ 主内容 ============ */
.main{margin-left:var(--side-w);}

/* ============ 按钮 ============ */
.btn-brand,.btn-ghost,.btn-text{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;text-decoration:none;cursor:pointer;border:0;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.btn-brand{
  background:var(--brand);color:#04211B;border-radius:var(--r-btn);
  padding:12px 22px;font-size:15px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 26px -16px rgba(20,201,163,.9);
}
.btn-brand:hover{background:#1BD9AF;color:#04211B;transform:translateY(-1px);box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 0 24px rgba(20,201,163,.45);}
.btn-brand:active{transform:translateY(0) scale(.99);}
.btn-ghost{
  background:transparent;color:var(--t1);border:1px solid var(--glass-line);
  border-radius:var(--r-btn);padding:11px 20px;font-size:15px;
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-light);}
.btn-text{
  background:none;border:0;color:var(--brand-light);padding:0;font-size:14px;font-weight:600;
  text-underline-offset:3px;
}
.btn-text:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.btn-brand.wide,.btn-ghost.wide{width:100%;}
.btn-brand[disabled],.btn-ghost[disabled]{opacity:.4;box-shadow:none;pointer-events:none;}

/* ============ 徽章 ============ */
.badge-tag{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:rgba(20,201,163,.08);color:var(--brand-light);border:1px solid rgba(20,201,163,.28);
}
.badge-tag.amber{background:rgba(242,181,68,.08);color:var(--amber);border-color:rgba(242,181,68,.3);}
.badge-tag.rose{background:rgba(255,107,138,.08);color:var(--rose);border-color:rgba(255,107,138,.3);}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:70px 0 60px;}
.hero::after{
  content:"";position:absolute;right:-140px;top:-180px;width:640px;height:640px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,201,163,.12),transparent 68%);pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.02fr 1fr;gap:56px;align-items:center;}
.hero-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover;background:var(--bg-2);}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(6,10,18,.05) 30%,rgba(6,10,18,.78) 100%);
}
.hero-copy h1{font-size:clamp(28px,4.2vw,42px);font-weight:800;margin:16px 0 16px;}
.hero-copy .lead{font-size:16.5px;color:var(--t2);max-width:560px;line-height:1.8;}
.hero-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-list li{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t2);
  background:var(--glass);border:1px solid var(--glass-line);border-radius:999px;padding:7px 14px;
}
.hero-list i{color:var(--brand);font-size:12px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:34px;padding-top:26px;border-top:1px solid var(--line);}
.hero-stats .num{
  font-size:24px;font-weight:800;color:var(--t1);font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;display:block;line-height:1.2;
}
.hero-stats .num em{font-style:normal;font-size:13px;color:var(--brand);margin-left:4px;font-weight:700;}
.hero-stats .lbl{font-size:13px;color:var(--t3);margin-top:4px;display:block;}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section.tight{padding-top:56px;}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{font-size:clamp(24px,3vw,30px);font-weight:800;margin:14px 0 12px;}
.sec-head p{font-size:15.5px;color:var(--t2);}

/* ============ 文档布局：目录 + 内容 ============ */
.doc-layout{display:grid;grid-template-columns:236px 1fr;gap:52px;align-items:start;}
.doc-toc{
  position:sticky;top:28px;background:var(--bg-1);border:1px solid var(--line);
  border-radius:var(--r-card);padding:18px 14px;box-shadow:var(--shadow-card);
}
.doc-toc .toc-title{
  font-size:12px;color:var(--t3);letter-spacing:.14em;text-transform:uppercase;
  font-weight:700;padding:0 10px 12px;margin-bottom:8px;border-bottom:1px solid var(--line);
}
.doc-toc a{
  position:relative;display:block;padding:9px 12px;border-radius:10px;
  font-size:14px;color:var(--t2);transition:background .22s var(--ease),color .22s var(--ease);
}
.doc-toc a:hover{background:rgba(255,255,255,.05);color:var(--t1);}
.doc-toc a.active{background:var(--glass);color:var(--t1);font-weight:600;}
.doc-toc a.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:0 3px 3px 0;background:var(--brand);
}

.doc-body{display:flex;flex-direction:column;gap:56px;}
.doc-block h2{font-size:clamp(21px,2.4vw,26px);font-weight:800;margin-bottom:14px;}
.doc-block h2 .idx{
  display:inline-block;font-size:13px;font-weight:700;color:var(--brand);
  border:1px solid rgba(20,201,163,.35);border-radius:6px;padding:1px 7px;margin-right:10px;
  vertical-align:middle;transform:translateY(-2px);font-variant-numeric:tabular-nums;
}
.doc-block h3{font-size:18px;font-weight:700;margin:26px 0 10px;}
.doc-block p{font-size:15.5px;line-height:1.85;}
.doc-block p + p{margin-top:14px;}

.check-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px;}
.check-list li{
  background:var(--bg-1);border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;font-size:14.5px;line-height:1.7;
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.check-list li:hover{border-color:rgba(20,201,163,.4);transform:translateY(-3px);}
.check-list li strong{display:flex;align-items:center;gap:9px;color:var(--t1);font-size:15px;margin-bottom:6px;}
.check-list li i{color:var(--brand);font-size:14px;}

.step-list{margin-top:24px;display:flex;flex-direction:column;gap:0;}
.step-list li{
  position:relative;padding:0 0 26px 44px;font-size:15px;line-height:1.8;
}
.step-list li::before{
  content:attr(data-step);position:absolute;left:0;top:1px;
  width:26px;height:26px;border-radius:50%;border:1px solid rgba(242,181,68,.5);
  color:var(--amber);font-size:12.5px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.step-list li::after{
  content:"";position:absolute;left:13px;top:30px;bottom:4px;width:1px;background:var(--line);
}
.step-list li:last-child{padding-bottom:0;}
.step-list li:last-child::after{display:none;}
.step-list li strong{color:var(--t1);}

.figure{margin-top:26px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--bg-2);}
.figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.figure figcaption{font-size:13px;color:var(--t3);padding:12px 16px;border-top:1px solid var(--line);background:var(--bg-1);}

.mini-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px;}
.mini-card{
  background:var(--bg-1);border:1px solid var(--line);border-radius:14px;padding:18px;
  transition:border-color .22s var(--ease);
}
.mini-card:hover{border-color:var(--line-strong);}
.mini-card h4{font-size:15px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.mini-card h4 i{color:var(--brand);font-size:13px;}
.mini-card p{font-size:14px;color:var(--t2);line-height:1.75;}

/* ============ 表格 ============ */
.table-wrap{
  margin-top:26px;border:1px solid var(--line);border-radius:var(--r-table);
  background:var(--bg-1);overflow:hidden;
}
.table-scroll{overflow-x:auto;}
table.info-table{width:100%;border-collapse:collapse;min-width:660px;}
table.info-table thead th{
  font-size:13px;color:var(--t3);font-weight:600;letter-spacing:.04em;
  text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
  background:rgba(255,255,255,.02);
}
table.info-table tbody td{
  padding:15px 18px;font-size:14.5px;border-bottom:1px solid var(--line);vertical-align:top;
}
table.info-table tbody tr:nth-child(even){background:rgba(255,255,255,.012);}
table.info-table tbody tr:last-child td{border-bottom:0;}
table.info-table tbody td:first-child{color:var(--t1);font-weight:600;}
.table-note{font-size:13px;color:var(--t3);padding:12px 18px;border-top:1px solid var(--line);background:rgba(255,255,255,.02);}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line);margin-top:8px;}
.faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.faq .accordion-button{
  background:transparent;color:var(--t1);font-size:16px;font-weight:700;
  padding:20px 6px 20px 34px;box-shadow:none;display:flex;align-items:center;gap:10px;
  position:relative;line-height:1.6;
}
.faq .accordion-button:not(.collapsed){color:var(--t1);background:transparent;box-shadow:none;}
.faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px;}
.faq .accordion-button .q-icon{color:var(--brand);font-size:18px;position:absolute;left:4px;top:22px;}
.faq .accordion-button::after{
  content:"＋";background-image:none;font-size:17px;color:var(--brand);
  width:auto;height:auto;margin-left:auto;line-height:1;
  transition:transform .26s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  content:"－";transform:rotate(180deg);
}
.faq .accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:-1px;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--brand);
}
.faq .accordion-body{
  padding:0 6px 22px 34px;font-size:15px;line-height:1.8;color:var(--t2);
}

/* ============ 表单 ============ */
.form-shell{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-card);
}
.assist-form{display:flex;flex-direction:column;gap:20px;margin-top:22px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13.5px;color:var(--t1);font-weight:600;}
.field input,.field select,.field textarea{
  width:100%;background:#0D1526;border:1px solid var(--glass-line);border-radius:10px;
  padding:12px 16px;color:var(--t1);font-size:14.5px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.field textarea{resize:vertical;min-height:104px;line-height:1.75;}
.field input::placeholder,.field textarea::placeholder{color:var(--t3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#0F1A2C;
  box-shadow:0 0 0 3px rgba(20,201,163,.16);
}
.field select{
  appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236F8199'%3E%3Cpath d='M3.2 5.6 8 10.4l4.8-4.8'  stroke='%236F8199' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;background-size:16px;
  padding-right:42px;
}
.field select option{background:#0D1526;color:var(--t1);}
.field .hint{font-size:12px;color:var(--t3);}
.field .hint.err{color:var(--rose);}
.field.invalid input,.field.invalid select{border-color:var(--rose);box-shadow:0 0 0 3px rgba(255,107,138,.14);}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.form-note{font-size:13px;color:var(--t3);}
.form-msg{
  font-size:14px;color:var(--brand-light);background:rgba(20,201,163,.08);
  border:1px solid rgba(20,201,163,.3);border-radius:10px;padding:12px 16px;
}

/* ============ CTA ============ */
.cta-card{
  position:relative;overflow:hidden;background:var(--bg-1);border:1px solid var(--line);
  border-radius:20px;padding:38px 40px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;
  box-shadow:var(--shadow-card);
}
.cta-card::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:520px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,201,163,.12),transparent 70%);pointer-events:none;
}
.cta-card > *{position:relative;}
.cta-card h2{font-size:clamp(21px,2.6vw,27px);font-weight:800;margin-bottom:10px;}
.cta-card p{font-size:15px;color:var(--t2);max-width:640px;}
.cta-notes{display:flex;flex-wrap:wrap;gap:18px;margin-top:26px;}
.cta-notes li{font-size:13px;color:var(--t3);display:inline-flex;align-items:center;gap:7px;}
.cta-notes i{color:var(--brand);font-size:12px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:56px 0 24px;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand{display:flex;align-items:center;gap:11px;color:var(--t1);text-decoration:none;margin-bottom:16px;}
.footer-brand p{font-size:13.5px;color:var(--t3);line-height:1.8;max-width:340px;}
.footer-contact{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:13.5px;color:var(--brand-light);
}
.footer-contact:hover{color:var(--brand);}
.footer-col h4{font-size:13px;color:var(--t1);letter-spacing:.08em;margin-bottom:16px;font-weight:700;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--t2);}
.footer-col a:hover{color:var(--brand-light);text-decoration:underline;text-underline-offset:3px;}
.footer-bar{
  margin-top:42px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--t3);
}
.footer-bar a{color:var(--t2);}
.footer-bar a:hover{color:var(--brand-light);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;z-index:1030;
  background:var(--glass);border:1px solid var(--glass-line);color:var(--t1);
  backdrop-filter:blur(12px);font-size:15px;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .26s var(--ease),visibility .26s var(--ease),transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{border-color:var(--brand);color:var(--brand-light);box-shadow:0 0 24px rgba(20,201,163,.35);}

/* ============ 响应式 ============ */
@media (max-width:1399.98px){
  .shell{max-width:1180px;}
}
@media (max-width:1199.98px){
  :root{--side-w:72px;}
  .sidebar{padding:20px 10px;align-items:stretch;}
  .sidebar .brand{justify-content:center;padding:2px 0 18px;}
  .brand-text{display:none;}
  .side-link{justify-content:center;padding:12px 0;}
  .side-link span{display:none;}
  .side-link.active::before{left:-10px;}
  .side-foot .btn-brand{font-size:0;padding:12px 0;gap:0;}
  .side-foot .btn-brand i{font-size:15px;}
  .hero-grid{gap:38px;}
  .doc-layout{grid-template-columns:1fr;gap:30px;}
  .doc-toc{position:static;}
  .mini-cards{grid-template-columns:1fr 1fr;}
}
@media (max-width:991.98px){
  html{scroll-padding-top:74px;}
  .topbar{display:flex;}
  .sidebar{
    width:78vw;max-width:320px;padding:22px 16px;
    transform:translateX(-100%);transition:transform .28s var(--ease);
    box-shadow:0 0 60px rgba(0,0,0,.6);
  }
  .sidebar.open{transform:none;}
  .sidebar .brand{justify-content:flex-start;padding-left:6px;}
  .brand-text{display:flex;}
  .side-link{justify-content:flex-start;padding:12px;height:48px;font-size:15px;}
  .side-link span{display:inline;}
  .side-link.active::before{left:-16px;}
  .side-foot .btn-brand{font-size:15px;padding:12px 18px;}
  .side-foot .btn-brand i{font-size:14px;}
  .main{margin-left:0;padding-top:60px;}
  .hero{padding:44px 0 40px;}
  .hero-grid{grid-template-columns:1fr;gap:28px;}
  .hero-media{order:-1;}
  .hero-media img{aspect-ratio:16/10;}
  .section{padding:64px 0;}
  .section.tight{padding-top:36px;}
  .doc-body{gap:44px;}
  .check-list{grid-template-columns:1fr;}
  .cta-card{grid-template-columns:1fr;padding:30px 24px;}
  .cta-card .btn-brand{width:100%;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
  .form-row{grid-template-columns:1fr;}
}
@media (max-width:767.98px){
  .shell{padding:0 16px;}
  .hero-stats{gap:24px;justify-content:space-between;}
  .hero-stats > div{flex:1 1 30%;}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{width:100%;}
  .mini-cards{grid-template-columns:1fr;}
  .doc-toc{display:flex;gap:8px;overflow-x:auto;padding:10px;scrollbar-width:none;}
  .doc-toc::-webkit-scrollbar{display:none;}
  .doc-toc .toc-title{display:none;}
  .doc-toc a{white-space:nowrap;padding:8px 12px;font-size:13.5px;border:1px solid var(--line);}
  .doc-toc a.active::before{display:none;}
  .doc-toc a.active{border-color:rgba(20,201,163,.4);}
  .form-shell{padding:20px 16px;}
  .form-actions .btn-brand{width:100%;}
  .footer-bar{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (max-width:575.98px){
  body{font-size:14.5px;}
  .hero-copy h1{font-size:26px;}
  .hero-copy .lead{font-size:15px;}
  .section{padding:52px 0;}
  .sec-head{margin-bottom:30px;}
  .sec-head h2{font-size:22px;}
  .cta-card{padding:24px 18px;}
  .faq .accordion-button{font-size:15px;padding:16px 4px 16px 30px;}
  .faq .accordion-button .q-icon{top:17px;font-size:16px;}
  .faq .accordion-body{padding:0 4px 18px 30px;font-size:14.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}