/* roulang page: index */
:root{
  --brand:#0A7E8C;
  --brand-deep:#075963;
  --accent:#FF7A3D;
  --accent-deep:#E8641F;
  --cool:#7FE3F0;
  --bg:#F5F9FB;
  --surface:#FFFFFF;
  --soft:#EDF5F7;
  --ink:#0D1B21;
  --ink-2:#465A64;
  --ink-3:#7C8E97;
  --line:#DCE7EC;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(13,27,33,.06);
  --sh-2:0 12px 28px -18px rgba(13,27,33,.30);
  --sec:88px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .15s ease;}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 14px;}
ul,ol{margin:0 0 14px;padding-left:20px;}
button{font-family:inherit;}
::selection{background:rgba(127,227,240,.45);color:var(--ink);}
:focus-visible{outline:2px solid rgba(10,126,140,.55);outline-offset:2px;border-radius:6px;}

.container{max-width:1200px;padding-left:24px;padding-right:24px;}
@media (max-width:767.98px){.container{padding-left:20px;padding-right:20px;}}

/* ============ 通用组件 ============ */
.btn{
  border-radius:var(--r-btn);
  font-weight:600;
  font-size:15px;
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  line-height:1.2;
  padding:0 24px;
  height:46px;
  box-shadow:none;
}
.btn:focus,.btn:active{box-shadow:0 0 0 4px rgba(10,126,140,.18);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover,.btn-accent:focus{background:var(--accent-deep);color:#fff;transform:translateY(-1px);}
.btn-brand{background:var(--brand);color:#fff;}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-deep);color:#fff;transform:translateY(-1px);}
.btn-outline-brand{background:#fff;color:var(--brand);border-color:rgba(10,126,140,.45);}
.btn-outline-brand:hover,.btn-outline-brand:focus{background:var(--soft);color:var(--brand-deep);border-color:var(--brand);}
.btn-ghost{background:transparent;color:var(--brand);padding:0;height:auto;font-size:14px;}
.btn-ghost:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px;}
.btn-sm{height:38px;font-size:14px;padding:0 16px;}
.btn-lg{height:48px;font-size:16px;padding:0 28px;}
.btn-block{width:100%;}

.badge-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--soft);
  color:var(--brand);
  border-radius:999px;
  padding:4px 12px;
  font-size:12px;
  font-weight:600;
  line-height:1.6;
  white-space:nowrap;
}
.chip{
  display:inline-flex;align-items:center;
  padding:5px 13px;border-radius:999px;
  background:#F2F7F9;border:1px solid var(--line);
  color:var(--ink-2);font-size:13px;font-weight:500;
  transition:all .18s ease;
}
.chip:hover{background:var(--soft);border-color:rgba(10,126,140,.4);color:var(--brand-deep);}

.sec{padding:var(--sec) 0;}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;margin-bottom:12px;}
.sec-head p{font-size:15.5px;color:var(--ink-2);margin:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;color:var(--brand);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cool);border-radius:2px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(13,27,33,.45);}
.header-inner{
  display:flex;align-items:center;gap:20px;
  height:70px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-ic{width:28px;height:28px;color:var(--brand);flex:none;}
.brand-txt{font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap;letter-spacing:-.01em;}
.brand-txt em{font-style:normal;color:var(--brand);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-2);
  border-radius:8px;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;
  height:2px;background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand-deep);font-weight:600;}
.main-nav a.active::after{transform:scaleX(1);}
.header-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:#F2F7F9;border:1px solid transparent;
  border-radius:999px;padding:0 14px;height:40px;width:220px;
  transition:all .18s ease;
}
.search-box:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 4px rgba(10,126,140,.12);}
.search-box svg{width:16px;height:16px;color:var(--ink-3);flex:none;}
.search-box input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--ink);
}
.search-box input::placeholder{color:var(--ink-3);}
.menu-toggle{
  display:none;
  width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;cursor:pointer;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

.drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:10px 0 18px;
}
.drawer.open{display:block;}
.drawer a.drawer-link{
  display:block;padding:12px 4px;font-size:15px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer a.drawer-link:hover{color:var(--brand);}
.drawer .btn{margin-top:16px;}

/* ============ Hero ============ */
.hero{
  position:relative;
  background:
    repeating-linear-gradient(115deg, rgba(10,126,140,.045) 0 1px, transparent 1px 14px),
    linear-gradient(180deg,#FBFDFE 0%,var(--bg) 100%);
  padding:64px 0 56px;
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.hero h1{
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.28;
  margin-bottom:18px;
}
.hero-sub{font-size:17px;color:var(--ink-2);max-width:520px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-figure{
  border-radius:16px;overflow:hidden;
  box-shadow:var(--sh-2);border:1px solid var(--line);
  background:var(--soft);
  aspect-ratio:4/3;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.metrics{
  display:flex;align-items:stretch;
  border-top:1px solid var(--line);padding-top:22px;gap:0;max-width:560px;
}
.metric{flex:1;padding:0 18px;}
.metric:first-child{padding-left:0;}
.metric + .metric{border-left:1px solid var(--line);}
.metric b{display:block;font-size:24px;font-weight:700;color:var(--brand);line-height:1.3;font-variant-numeric:tabular-nums;}
.metric span{font-size:13px;color:var(--ink-3);}

/* ============ 对比表 ============ */
.cmp-wrap{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
.cmp-table{width:100%;min-width:820px;border-collapse:separate;border-spacing:0;}
.cmp-table thead th{
  background:var(--soft);
  font-weight:600;font-size:14.5px;color:var(--ink);
  padding:18px 16px;text-align:center;
  border-bottom:1px solid var(--line);
  position:relative;
  white-space:nowrap;
}
.cmp-table thead th:first-child{text-align:left;font-size:13px;color:var(--ink-3);font-weight:600;letter-spacing:.04em;}
.cmp-table tbody td{
  padding:0 16px;height:56px;font-size:14.5px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
  text-align:center;
  transition:background .15s ease;
}
.cmp-table tbody td:first-child{text-align:left;color:var(--ink);font-weight:500;}
.cmp-table tbody tr:hover td{background:#F8FCFD;}
.cmp-table tbody tr:hover td:first-child{background:#F8FCFD;}
.cmp-table td:first-child,.cmp-table th:first-child{
  position:sticky;left:0;background:#fff;z-index:2;min-width:180px;
}
.cmp-table thead th:first-child{background:var(--soft);}
.cmp-table .col-rec{background:#FFF6F1 !important;}
.cmp-table thead th.col-rec{color:var(--brand-deep);font-weight:700;}
.cmp-table tbody tr:hover td.col-rec{background:#FFEFE6 !important;}
.rec-flag{
  position:absolute;top:0;right:0;
  background:var(--accent);color:#fff;font-size:11px;font-weight:700;
  padding:3px 10px 3px 12px;
  border-bottom-right-radius:0;border-top-right-radius:0;
  clip-path:polygon(12px 0,100% 0,100% 100%,0 100%);
  letter-spacing:.04em;
}
.cmp-yes{color:var(--brand);display:inline-flex;}
.cmp-yes svg{width:17px;height:17px;}
.cmp-no{color:#B9C7CE;}
.cmp-foot td{padding:18px 16px;border-bottom:0;background:#fff;}
.cmp-scroll-tip{display:none;font-size:13px;color:var(--ink-3);margin-top:10px;}

/* ============ 等级卡 ============ */
.tier-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  padding-top:18px;
}
.tier{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 26px 26px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  position:relative;
  display:flex;flex-direction:column;
}
.tier:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(10,126,140,.3);}
.tier-mid{border-color:rgba(10,126,140,.55);transform:translateY(-14px);padding-top:34px;}
.tier-mid:hover{transform:translateY(-17px);}
.tier-flag{
  position:absolute;top:0;right:0;
  background:var(--brand);color:#fff;font-size:11.5px;font-weight:700;
  padding:4px 14px;border-radius:0 var(--r-card) 0 10px;
  letter-spacing:.05em;
}
.tier h3{font-size:20px;margin-bottom:6px;}
.tier .tier-desc{font-size:13.5px;color:var(--ink-3);margin-bottom:16px;}
.tier .chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.tier ul{list-style:none;padding:0;margin:0 0 22px;}
.tier li{
  display:flex;gap:9px;align-items:flex-start;
  font-size:14.5px;color:var(--ink-2);padding:7px 0;
}
.tier li svg{width:16px;height:16px;color:var(--brand);flex:none;margin-top:6px;}
.tier .tier-foot{margin-top:auto;}

/* ============ 内容预览 ============ */
.preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.pv{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;
}
.pv:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(10,126,140,.3);}
.pv-img{position:relative;overflow:hidden;background:var(--soft);aspect-ratio:16/9;}
.pv-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.pv:hover .pv-img img{transform:scale(1.04);}
.pv-a{grid-column:span 2;grid-row:span 2;}
.pv-a .pv-img{aspect-ratio:16/10;}
.pv-b{grid-column:span 2;}
.pv-c,.pv-d{grid-column:span 1;}
.pv-e{grid-column:span 2;}
.pv-f{grid-column:span 2;}
.pv-badge{
  position:absolute;top:12px;left:12px;
  background:rgba(255,255,255,.94);color:var(--brand);
  font-size:12px;font-weight:600;border-radius:999px;padding:3px 11px;
  backdrop-filter:blur(2px);
}
.pv-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1;}
.pv-body h3{font-size:16.5px;line-height:1.5;}
.pv-body p{font-size:13.5px;color:var(--ink-3);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.pv-lock{position:absolute;inset:0;background:rgba(13,27,33,.34);display:flex;align-items:center;justify-content:center;}
.pv-lock span{
  background:rgba(255,255,255,.95);color:var(--brand-deep);
  font-size:12.5px;font-weight:700;padding:6px 14px;border-radius:999px;
  display:inline-flex;align-items:center;gap:6px;
}

/* ============ 资讯卡片 ============ */
.news-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px 22px 18px;
  height:100%;
  display:flex;flex-direction:column;gap:10px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(10,126,140,.3);}
.news-card h3{font-size:16.5px;line-height:1.55;margin:0;}
.news-card h3 a{color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover h3 a{color:var(--brand);}
.news-card .news-desc{
  font-size:14px;color:var(--ink-2);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);margin-top:auto;padding-top:12px;
  border-top:1px solid var(--line);font-variant-numeric:tabular-nums;
}
.news-meta .more{color:var(--brand);font-weight:600;}
.empty-state{
  border:1.5px dashed var(--line);
  border-radius:var(--r-card);
  padding:46px 20px;
  text-align:center;
  font-size:14px;
  color:var(--ink-3);
  background:rgba(255,255,255,.6);
}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;cursor:pointer;
  display:flex;align-items:center;gap:16px;
  padding:20px 0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
  position:relative;
  transition:color .18s ease;
}
.faq-q::before{
  content:"";position:absolute;left:-14px;top:16px;bottom:16px;width:3px;
  background:transparent;border-radius:3px;transition:background .18s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-num{color:var(--brand);font-weight:700;font-size:14px;font-variant-numeric:tabular-nums;flex:none;width:26px;}
.faq-text{flex:1;}
.faq-ic{position:relative;width:16px;height:16px;flex:none;}
.faq-ic::before,.faq-ic::after{
  content:"";position:absolute;background:var(--ink-2);border-radius:2px;transition:transform .22s ease,background .18s ease;
}
.faq-ic::before{left:0;top:7px;width:16px;height:2px;}
.faq-ic::after{left:7px;top:0;width:2px;height:16px;}
.faq-item.open .faq-ic::after{transform:rotate(90deg);}
.faq-item.open .faq-num{color:var(--accent);}
.faq-item.open .faq-q{color:var(--brand-deep);}
.faq-item.open .faq-q::before{background:var(--accent);}
.faq-item.open .faq-ic::before,.faq-item.open .faq-ic::after{background:var(--accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
.faq-a-inner{padding:0 0 22px 42px;font-size:15px;color:var(--ink-2);line-height:1.85;}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  background:
    repeating-linear-gradient(115deg, rgba(10,126,140,.05) 0 1px, transparent 1px 16px),
    var(--soft);
  padding:64px 0;
}
.cta-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--sh-2);
  padding:44px 40px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;
}
.cta-card h2{font-size:clamp(21px,2.4vw,27px);margin-bottom:12px;}
.cta-card p{margin:0;font-size:15px;color:var(--ink-2);}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.cta-actions .btn{width:100%;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#A9BCC4;padding:60px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px;}
.footer-brand .brand-txt{color:#fff;}
.footer-brand .brand-txt em{color:var(--cool);}
.footer-brand .brand-ic{color:var(--cool);}
.footer-brand p{font-size:14px;color:#A9BCC4;margin:16px 0 18px;max-width:320px;line-height:1.8;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags span{
  font-size:12px;color:#8FA6AF;
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;padding:3px 11px;
}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a,.footer-col span{font-size:14px;color:#A9BCC4;line-height:1.7;}
.footer-col a:hover{color:var(--cool);}
.footer-note{font-size:13px;color:#8FA6AF;line-height:1.8;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#8FA6AF;
}
.footer-bottom a{color:#A9BCC4;}
.footer-bottom a:hover{color:var(--cool);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .search-box{width:180px;}
  .main-nav a{padding:8px 9px;font-size:14px;}
}
@media (max-width:991.98px){
  :root{--sec:64px;}
  .main-nav{display:none;}
  .search-box{display:none;}
  .menu-toggle{display:flex;}
  .header-cta{display:none;}
  .hero{padding:44px 0 40px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-figure{order:-1;aspect-ratio:16/9;}
  .hero-sub{max-width:100%;}
  .tier-grid{grid-template-columns:1fr 1fr;}
  .tier-mid{transform:none;}
  .tier-mid:hover{transform:translateY(-3px);}
  .tier:last-child{grid-column:span 2;}
  .preview-grid{grid-template-columns:repeat(2,1fr);}
  .pv-a{grid-column:span 2;grid-row:auto;}
  .pv-b,.pv-e,.pv-f{grid-column:span 2;}
  .pv-c,.pv-d{grid-column:span 1;}
  .cmp-scroll-tip{display:block;}
  .cta-card{grid-template-columns:1fr;padding:32px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767.98px){
  :root{--sec:48px;}
  body{font-size:15.5px;}
  .hero h1{font-size:clamp(25px,6.6vw,32px);}
  .metrics{flex-wrap:wrap;gap:14px;}
  .metric{flex:1 1 40%;padding:0 14px;}
  .metric:first-child{padding-left:0;}
  .metric + .metric{border-left:1px solid var(--line);}
  .metric:nth-child(3){border-left:1px solid var(--line);}
  .metric b{font-size:21px;}
  .tier-grid{grid-template-columns:1fr;padding-top:0;}
  .tier:last-child{grid-column:auto;}
  .preview-grid{grid-template-columns:1fr;}
  .pv-a,.pv-b,.pv-c,.pv-d,.pv-e,.pv-f{grid-column:span 1;}
  .pv-a .pv-img{aspect-ratio:16/9;}
  .faq-a-inner{padding-left:0;}
  .faq-q{font-size:15px;gap:12px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .hero-actions .btn{flex:1 1 100%;}
  .sec-head{margin-bottom:26px;}
  .cta-band{padding:40px 0;}
}

/* roulang page: article */
:root{
  --brand:#0A7E8C;
  --brand-deep:#075963;
  --brand-soft:#EDF5F7;
  --brand-ring:rgba(10,126,140,.42);
  --accent:#FF7A3D;
  --accent-deep:#E8641F;
  --accent-soft:#FFF6F1;
  --cool:#7FE3F0;
  --bg:#F5F9FB;
  --surface:#FFFFFF;
  --ink:#0D1B21;
  --ink-2:#465A64;
  --ink-3:#7C8E97;
  --line:#DCE7EC;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(13,27,33,.06);
  --shadow-2:0 12px 28px -18px rgba(13,27,33,.30);
  --sec-y:88px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,.btn:focus-visible{
  outline:2px solid var(--brand-ring);
  outline-offset:2px;
}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(6px);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:0 6px 22px -18px rgba(13,27,33,.55)}
.header-inner{display:flex;align-items:center;gap:24px;height:70px}
.brand{display:inline-flex;align-items:center;gap:9px;flex-shrink:0}
.brand-ic{width:26px;height:26px;color:var(--brand)}
.brand-txt{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand-txt em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1;min-width:0}
.main-nav a{
  position:relative;display:inline-flex;align-items:center;height:70px;padding:0 12px;
  font-size:14.5px;font-weight:500;color:var(--ink-2);white-space:nowrap;transition:color .15s ease;
}
.main-nav a:hover{color:var(--brand)}
.main-nav a.active{color:var(--brand);font-weight:600}
.main-nav a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.search-box{
  display:flex;align-items:center;gap:8px;height:38px;width:196px;padding:0 12px;
  background:#F2F7F9;border:1px solid transparent;border-radius:var(--r-pill);
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease,width .18s ease;
}
.search-box svg{width:16px;height:16px;color:var(--ink-3);flex-shrink:0}
.search-box input{
  border:0;background:transparent;outline:none;width:100%;font-size:13.5px;color:var(--ink);
}
.search-box input::placeholder{color:var(--ink-3)}
.search-box:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(10,126,140,.12)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;text-decoration:none;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 20px -14px rgba(255,122,61,.95)}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep)}
.btn-soft{background:var(--brand-soft);color:var(--brand-deep);border-color:transparent}
.btn-soft:hover{background:#E1EFF2;color:var(--brand-deep)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{display:flex;width:100%}
.nav-burger{
  display:none;width:40px;height:40px;border:1px solid var(--line);background:#fff;
  border-radius:10px;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav-burger span{display:block;width:17px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.drawer{
  display:none;border-top:1px solid var(--line);background:#fff;padding:14px 24px 22px;
}
.drawer.is-open{display:block}
.drawer nav{display:flex;flex-direction:column}
.drawer nav a{
  padding:12px 2px;font-size:15px;color:var(--ink-2);border-bottom:1px solid var(--line);
}
.drawer nav a.active{color:var(--brand);font-weight:600}
.drawer .btn{margin-top:16px}

/* ===== Page head ===== */
.crumbs{padding:22px 0 0;font-size:13px;color:var(--ink-3)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#B9C9D1}
.crumbs .cur{color:var(--ink-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-head{padding:24px 0 26px;border-bottom:1px solid var(--line)}
.article-head h1{
  font-size:clamp(26px,3.4vw,40px);line-height:1.3;font-weight:700;color:var(--ink);
  margin-bottom:18px;word-break:break-word;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;font-size:13px;color:var(--ink-3)}
.badge-cat{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;
}
.meta-dot{width:1px;height:12px;background:var(--line)}
.meta-num{font-variant-numeric:tabular-nums}

/* ===== Article body ===== */
.article-shell{padding:44px 0 var(--sec-y)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 232px;gap:48px;align-items:start}
.article-main{min-width:0}
.prose{max-width:760px;font-size:16px;line-height:1.9;color:var(--ink-2);word-break:break-word}
.prose > *:first-child{margin-top:0}
.prose h2{
  font-size:clamp(21px,2.2vw,26px);font-weight:700;color:var(--ink);
  line-height:1.45;margin:42px 0 14px;padding-left:12px;border-left:3px solid var(--brand);
}
.prose h3{font-size:19px;font-weight:600;color:var(--ink);line-height:1.5;margin:30px 0 12px}
.prose h4{font-size:17px;font-weight:600;color:var(--ink);margin:24px 0 10px}
.prose p{margin:0 0 18px}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:8px}
.prose li::marker{color:var(--brand)}
.prose a{color:var(--brand);border-bottom:1px solid rgba(10,126,140,.35)}
.prose a:hover{color:var(--brand-deep);border-bottom-color:var(--brand-deep)}
.prose blockquote{
  margin:24px 0;padding:16px 20px;background:var(--brand-soft);
  border-left:3px solid var(--brand);border-radius:0 12px 12px 0;color:var(--ink-2);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:12px;margin:22px 0;box-shadow:var(--shadow-1)}
.prose figure{margin:24px 0}
.prose figcaption{font-size:13px;color:var(--ink-3);margin-top:8px;text-align:center}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;background:#fff;border-radius:12px;overflow:hidden}
.prose th{
  background:var(--brand-soft);color:var(--ink);font-weight:600;text-align:left;
  padding:13px 15px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.prose td{padding:13px 15px;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}
.prose tr:last-child td{border-bottom:0}
.prose pre{
  background:#EEF3F5;border-radius:12px;padding:16px 18px;overflow-x:auto;
  font-family:ui-monospace,Menlo,Consolas,"Courier New",monospace;
  font-size:14px;line-height:1.75;color:var(--ink-2);margin:22px 0;
}
.prose code{
  font-family:ui-monospace,Menlo,Consolas,"Courier New",monospace;
  font-size:.92em;background:#EEF3F5;border-radius:5px;padding:2px 6px;color:var(--brand-deep);
}
.prose pre code{background:none;padding:0;color:inherit;font-size:inherit}
.prose hr{border:0;border-top:1px solid var(--line);margin:34px 0}

/* Side aside */
.article-aside{position:sticky;top:94px;display:flex;flex-direction:column;gap:16px}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--shadow-1)}
.aside-card h3{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:14px}
.aside-list li{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--ink-3);padding:8px 0;border-bottom:1px dashed var(--line)}
.aside-list li:last-child{border-bottom:0;padding-bottom:0}
.aside-list b{font-weight:600;color:var(--ink);max-width:120px;text-align:right;word-break:break-word}
.aside-tags{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-pill);
  background:#F2F7F9;color:var(--ink-2);font-size:12px;border:1px solid var(--line);
}
.chip:hover{background:var(--brand-soft);color:var(--brand);border-color:rgba(10,126,140,.3)}

/* Empty state */
.empty-state{
  border:1.5px dashed var(--line);border-radius:var(--r-card);background:#fff;
  padding:56px 24px;text-align:center;
}
.empty-state p{font-size:14px;color:var(--ink-3);margin-bottom:20px}

/* ===== End of article ===== */
.article-foot{margin-top:52px;padding-top:28px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:36px}
.tag-row span{font-size:13px;color:var(--ink-3);margin-right:4px}
.block-title{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--ink);margin-bottom:8px}
.block-desc{font-size:14px;color:var(--ink-3);margin-bottom:22px}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(10,126,140,.3)}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.post-card:hover .thumb img{transform:scale(1.03)}
.thumb .badge-cat{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94)}
.post-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h4{font-size:16px;font-weight:600;line-height:1.55;color:var(--ink)}
.post-card:hover .post-body h4{color:var(--brand)}
.post-body p{font-size:13.5px;color:var(--ink-3);line-height:1.7}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--ink-3);margin-top:auto;padding-top:6px}
.post-meta .go{color:var(--brand);font-weight:600}

.nav-split{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px}
.nav-split a{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px 18px;box-shadow:var(--shadow-1);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.nav-split a:hover{border-color:rgba(10,126,140,.35);box-shadow:var(--shadow-2);transform:translateY(-1px)}
.nav-split em{display:block;font-style:normal;font-size:12px;color:var(--ink-3);margin-bottom:4px}
.nav-split strong{display:block;font-size:15px;font-weight:600;color:var(--ink);line-height:1.55}
.nav-split a:hover strong{color:var(--brand)}
.nav-split .right{text-align:right}

/* Mini CTA */
.mini-cta{
  margin-top:44px;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:var(--brand-soft);border:1px solid var(--line);border-radius:16px;padding:24px 28px;
  background-image:repeating-linear-gradient(115deg,rgba(10,126,140,.045) 0 1px,transparent 1px 14px);
}
.mini-cta h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:4px}
.mini-cta p{font-size:13.5px;color:var(--ink-3)}
.mini-cta .actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.link-more{font-size:14px;font-weight:600;color:var(--brand)}
.link-more:hover{color:var(--brand-deep)}

/* ===== Footer ===== */
.site-footer{background:#0D1B21;color:#A9BCC4;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-txt{color:#fff}
.footer-brand .brand-ic{color:var(--cool)}
.footer-brand p{font-size:14px;line-height:1.85;color:#93A9B2;max-width:320px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer-tags span{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:var(--r-pill);
  background:rgba(127,227,240,.1);color:#9FDCE6;font-size:12px;
}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:#A9BCC4}
.footer-col ul a:hover{color:var(--cool)}
.footer-note{font-size:13px;line-height:1.85;color:#8299A3}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:#7E939C;
}

/* ===== Responsive ===== */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-aside{display:none}
  .search-box{width:160px}
  .main-nav a{padding:0 9px;font-size:14px}
}
@media (max-width:991px){
  :root{--sec-y:64px}
  .main-nav{display:none}
  .search-box{display:none}
  .nav-burger{display:flex}
  .article-shell{padding-top:32px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .mini-cta{flex-direction:column;align-items:flex-start}
}
@media (max-width:767px){
  :root{--sec-y:48px}
  .container{padding:0 20px}
  .header-inner{height:64px;gap:12px}
  .brand-txt{font-size:16.5px}
  .header-actions .btn-sm{display:none}
  .crumbs{padding-top:16px}
  .article-head{padding:16px 0 20px}
  .article-head h1{font-size:clamp(23px,6vw,30px);margin-bottom:14px}
  .article-shell{padding-top:26px}
  .prose{font-size:15.5px;line-height:1.85}
  .prose h2{margin-top:32px}
  .prose table{display:block;overflow-x:auto;white-space:nowrap}
  .rel-grid{grid-template-columns:1fr}
  .nav-split{grid-template-columns:1fr}
  .nav-split .right{text-align:left}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:6px}
  .drawer{padding:12px 20px 20px}
}

/* roulang page: category1 */
:root{
  --brand:#0A7E8C;
  --brand-dark:#075963;
  --brand-soft:#EDF5F7;
  --accent:#FF7A3D;
  --accent-dark:#E8641F;
  --accent-soft:#FFF6F1;
  --cool:#7FE3F0;
  --bg:#F5F9FB;
  --surface:#FFFFFF;
  --ink:#0D1B21;
  --ink-2:#465A64;
  --ink-3:#7C8E97;
  --line:#DCE7EC;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(13,27,33,.06);
  --sh-2:0 12px 28px -18px rgba(13,27,33,.30);
  --sec:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .15s ease}
a:hover{color:var(--brand-dark)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(28px,4vw,44px);line-height:1.25}
h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35}
h3{font-size:19px;line-height:1.5;font-weight:600}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(10,126,140,.45);outline-offset:2px;border-radius:6px}
.container{max-width:1200px;width:100%;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:var(--sec) 0}
.section--tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:36px}
.section-head .eyebrow{margin-bottom:12px}
.section-head p{margin-top:12px;font-size:16px;color:var(--ink-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:var(--r-pill);
  padding:6px 14px;letter-spacing:.02em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1040;background:#fff;
  border-bottom:1px solid var(--line);transition:box-shadow .2s ease;
}
.site-header.scrolled{box-shadow:0 6px 20px -16px rgba(13,27,33,.5)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:70px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-ic{width:26px;height:26px;color:var(--brand);flex:0 0 auto}
.brand-txt{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand-txt em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:12px}
.main-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
  padding:24px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);
  transform-origin:center;transition:transform .18s ease;
}
.main-nav a:hover{color:var(--brand)}
.main-nav a.active{color:var(--brand);font-weight:600}
.main-nav a.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-search{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;
  background:#F2F7F9;border:1px solid transparent;border-radius:var(--r-pill);
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.nav-search svg{width:16px;height:16px;color:var(--ink-3);flex:0 0 auto}
.nav-search input{
  border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);
  width:132px;line-height:1;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(10,126,140,.14)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;text-align:center;transition:transform .16s ease,background .16s ease,color .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh-1)}
.btn-accent:hover,.btn-accent:focus{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(10,126,140,.55)}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-btn)}
.nav-cta{height:40px;padding:0 20px;font-size:14px;border-radius:var(--r-pill)}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;
  padding:12px 20px 22px;box-shadow:var(--sh-2);
}
.mobile-drawer.open{display:block}
.mobile-drawer a.m-link{
  display:block;padding:13px 4px;font-size:15px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.m-link.active{color:var(--brand);font-weight:600}
.mobile-drawer .btn{width:100%;margin-top:16px}

/* ============ 内页首屏 ============ */
.page-hero{position:relative;overflow:hidden;background:var(--brand-soft);border-bottom:1px solid var(--line)}
.page-hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.30;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(10,126,140,.10) 0 1px,transparent 1px 14px);
  opacity:.55;
}
.page-hero-inner{position:relative;z-index:2;padding:56px 24px 64px;max-width:1200px;margin:0 auto}
.breadcrumb-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);margin-bottom:20px;
}
.breadcrumb-bar a{color:var(--ink-3)}
.breadcrumb-bar a:hover{color:var(--brand)}
.breadcrumb-bar .sep{color:#B9C9D1}
.page-hero h1{max-width:820px;margin-top:14px;overflow-wrap:break-word}
.page-hero .lede{
  max-width:640px;margin-top:18px;font-size:17px;line-height:1.8;color:var(--ink-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;color:var(--brand);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  padding:6px 14px;
}

/* ============ 步骤流 ============ */
.step{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:36px 0;border-top:1px solid var(--line);
}
.step:first-of-type{border-top:0;padding-top:0}
.step-media{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);border:1px solid var(--line);background:var(--brand-soft)}
.step-media img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.step-media .badge-cat{
  position:absolute;left:14px;top:14px;background:#fff;color:var(--brand);
  font-size:12px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill);
  box-shadow:var(--sh-1);
}
.step-body{display:flex;gap:20px;align-items:flex-start}
.step-num{
  font-size:44px;font-weight:700;line-height:1;color:var(--brand);
  font-variant-numeric:tabular-nums;flex:0 0 auto;
  background:var(--brand-soft);border-radius:14px;padding:12px 16px;
}
.step-body h3{margin-bottom:10px}
.step-body p{margin-bottom:14px}
.tick-list{display:grid;gap:10px}
.tick-list li{position:relative;padding-left:26px;font-size:15px;color:var(--ink-2)}
.tick-list li::before{
  content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);border-radius:1px;
}
.step--rev .step-media{order:2}
.step--rev .step-body{order:1}

/* ============ 准备清单 ============ */
.prep{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:8px 0 0;overflow:hidden;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.table-scroll::-webkit-scrollbar{height:8px}
.table-scroll::-webkit-scrollbar-thumb{background:#CBDCE3;border-radius:8px}
table.spec{width:100%;border-collapse:collapse;min-width:640px}
table.spec thead th{
  background:var(--brand-soft);color:var(--ink);font-size:14px;font-weight:600;
  text-align:left;padding:14px 20px;border-bottom:1px solid var(--line);white-space:nowrap;
}
table.spec tbody td{
  padding:16px 20px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-2);
  vertical-align:top;
}
table.spec tbody tr:last-child td{border-bottom:0}
table.spec tbody tr:hover td{background:#F8FCFD}
table.spec td strong{color:var(--ink);font-weight:600}
.scroll-hint{font-size:13px;color:var(--ink-3);padding:10px 20px 4px;display:none}

/* ============ 卡点对照 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.panel:hover{border-color:rgba(10,126,140,.32);box-shadow:var(--sh-2);transform:translateY(-2px)}
.panel h3{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.panel h3 svg{width:20px;height:20px;color:var(--brand);flex:0 0 auto}
.panel .list{display:grid;gap:12px;margin-top:6px}
.panel .list li{
  font-size:15px;color:var(--ink-2);padding-left:16px;position:relative;
}
.panel .list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--cool);
}
.panel .list li b{color:var(--ink);font-weight:600}

/* ============ FAQ ============ */
.faq{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:8px 28px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;background:none;border:0;
  padding:22px 0;text-align:left;cursor:pointer;position:relative;
}
.faq-idx{
  font-size:13px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;
  flex:0 0 auto;width:26px;
}
.faq-title{font-size:16px;font-weight:600;color:var(--ink);flex:1 1 auto;line-height:1.6}
.faq-ico{width:16px;height:16px;position:relative;flex:0 0 auto}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--ink-3);border-radius:2px;transition:transform .2s ease,background .2s ease;
}
.faq-ico::before{left:0;top:7px;width:16px;height:2px}
.faq-ico::after{left:7px;top:0;width:2px;height:16px}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{font-size:15px;line-height:1.85;color:var(--ink-2);padding:0 0 22px 40px;margin:0}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:-28px;top:18px;bottom:18px;width:3px;
  background:var(--accent);border-radius:2px;
}
.faq-item.open .faq-idx{color:var(--accent)}
.faq-item.open .faq-title{color:var(--brand-dark)}
.faq-item.open .faq-ico::after{transform:rotate(90deg);background:var(--accent)}
.faq-item.open .faq-ico::before{background:var(--accent)}
.faq-q:hover .faq-title{color:var(--brand)}

/* ============ 窄条 CTA ============ */
.strip-cta{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#F0F8FA 0%,#F7FBFC 100%);
}
.strip-cta .inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:18px;padding:26px 0;
}
.strip-cta p{margin:0;font-size:15px;color:var(--ink-2)}
.strip-cta .links{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.text-link{font-size:15px;font-weight:600;color:var(--brand)}
.text-link:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:4px}

/* ============ 页脚 ============ */
.site-footer{background:#0D1B21;color:#A9BCC4;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-txt{color:#fff}
.footer-brand .brand-txt em{color:var(--cool)}
.footer-brand .brand-ic{color:var(--cool)}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9BCC4;margin-bottom:18px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags span{
  font-size:12px;color:#C6D6DD;border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-pill);padding:4px 12px;
}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:#A9BCC4}
.footer-col a:hover{color:var(--cool)}
.footer-note{font-size:13px;line-height:1.85;color:#8FA5AE;margin:0}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#7E949D;
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .header-inner{gap:16px}
  .main-nav{gap:18px;margin-left:4px}
  .nav-search input{width:110px}
}
@media (max-width:991px){
  :root{--sec:64px}
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:flex}
  .header-inner{min-height:64px}
  .step{grid-template-columns:1fr;gap:24px;padding:30px 0}
  .step--rev .step-media{order:0}
  .step--rev .step-body{order:0}
  .split{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-hero-inner{padding:44px 24px 52px}
  .scroll-hint{display:block}
}
@media (max-width:767px){
  :root{--sec:48px}
  .container{padding-left:20px;padding-right:20px}
  .brand-txt{font-size:16px}
  .nav-cta{display:none}
  .section--tight{padding:44px 0}
  .step-num{font-size:34px;padding:10px 13px}
  .faq{padding:4px 18px}
  .faq-a p{padding-left:0}
  .faq-item.open .faq-q::before{left:-18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .strip-cta .inner{flex-direction:column;align-items:flex-start}
  .hero-actions .btn{width:100%}
  .panel{padding:22px}
}
@media (max-width:520px){
  .page-hero h1{font-size:26px}
  .step-body{flex-direction:column;gap:12px}
  .step-num{font-size:30px}
  .brand-txt em{display:inline}
  .footer-bottom{flex-direction:column}
}

/* roulang page: category2 */
:root{
  --brand:#0A7E8C;
  --brand-dark:#075963;
  --brand-soft:rgba(10,126,140,.10);
  --accent:#FF7A3D;
  --accent-dark:#E8641F;
  --accent-soft:#FFF6F1;
  --cool:#7FE3F0;
  --bg:#F5F9FB;
  --surface:#FFFFFF;
  --tint:#EDF5F7;
  --ink:#0D1B21;
  --ink-2:#465A64;
  --ink-3:#7C8E97;
  --line:#DCE7EC;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(13,27,33,.06);
  --sh-2:0 12px 28px -18px rgba(13,27,33,.30);
  --sec:88px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--bg);
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,figure,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .15s ease,border-color .15s ease,background-color .15s ease,box-shadow .15s ease;}
a:hover{color:var(--brand-dark);}
button{font-family:inherit;}
:focus-visible{outline:2px solid rgba(10,126,140,.45);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px -14px rgba(13,27,33,.5);}
.header-inner{
  display:flex;align-items:center;gap:20px;
  min-height:70px;
}
.brand{display:inline-flex;align-items:center;gap:9px;flex-shrink:0;}
.brand-ic{width:26px;height:26px;color:var(--brand);flex-shrink:0;}
.brand-txt{
  font-size:18px;font-weight:700;letter-spacing:-.01em;color:var(--ink);
  white-space:nowrap;
}
.brand-txt em{font-style:normal;color:var(--brand);}

.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:24px 0 22px;
  font-size:15px;color:var(--ink-2);
  white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand);font-weight:600;}

.header-tools{display:flex;align-items:center;gap:12px;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;
  background:#F2F7F9;border:1px solid transparent;border-radius:var(--r-pill);
  transition:background-color .15s ease,border-color .15s ease,box-shadow .15s ease;
}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(10,126,140,.14);}
.nav-search svg{width:16px;height:16px;color:var(--ink-3);flex-shrink:0;}
.nav-search input{
  border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);width:132px;
}
.nav-search input::placeholder{color:var(--ink-3);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  font-size:15px;font-weight:600;line-height:1;
  border-radius:var(--r-btn);border:1px solid transparent;
  cursor:pointer;transition:background-color .15s ease,border-color .15s ease,color .15s ease,transform .15s ease,box-shadow .15s ease;
  white-space:nowrap;
}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh-1);}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-accent:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-pill);}
.btn-line{height:42px;padding:0 20px;font-size:14px;background:#fff;color:var(--ink-2);border-color:var(--line);}
.btn-line:hover{color:var(--brand);border-color:rgba(10,126,140,.45);background:var(--tint);}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
  background:#fff;color:var(--ink);cursor:pointer;
}
.nav-toggle:hover{border-color:rgba(10,126,140,.45);color:var(--brand);}
.nav-toggle svg{width:20px;height:20px;}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;
  background:#fff;z-index:120;
  transform:translateX(102%);transition:transform .26s ease;
  padding:22px 20px 28px;overflow-y:auto;
  box-shadow:-18px 0 40px -28px rgba(13,27,33,.6);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:38px;height:38px;border:1px solid var(--line);background:#fff;border-radius:10px;
  color:var(--ink-2);cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.drawer-close:hover{color:var(--brand);border-color:rgba(10,126,140,.45);}
.drawer nav{display:flex;flex-direction:column;}
.drawer nav a{
  padding:13px 4px;font-size:15px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer nav a.active{color:var(--brand);font-weight:600;}
.drawer nav a:hover{color:var(--brand);}
.drawer .drawer-cta{margin-top:20px;width:100%;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(13,27,33,.42);
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;z-index:110;
}
.drawer-mask.show{opacity:1;visibility:visible;}

/* ============ 首屏 ============ */
.page-hero{
  position:relative;
  padding:56px 0 64px;
  background:
    repeating-linear-gradient(115deg,rgba(10,126,140,.045) 0 1px,transparent 1px 16px),
    radial-gradient(900px 380px at 88% -10%,rgba(127,227,240,.26),transparent 62%),
    linear-gradient(180deg,#F7FBFD 0%,#F2F9FA 100%);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);margin-bottom:18px;
}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--brand);}
.crumb span.sep{color:#BFD2D9;}
.crumb .now{color:var(--ink-2);}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border:1px solid rgba(10,126,140,.18);
  border-radius:var(--r-pill);padding:5px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
h1{
  font-size:clamp(28px,4vw,44px);font-weight:700;line-height:1.25;letter-spacing:-.01em;
  color:var(--ink);
}
.hero-sub{
  margin-top:16px;font-size:17px;line-height:1.8;color:var(--ink-2);max-width:30em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;
  font-size:12.5px;color:var(--brand);
  background:#fff;border:1px solid rgba(10,126,140,.22);
  border-radius:var(--r-pill);padding:5px 12px;
}
.hero-figure{
  position:relative;
  border-radius:16px;overflow:hidden;background:var(--tint);
  border:1px solid var(--line);box-shadow:var(--sh-2);
  aspect-ratio:16/11;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;border-radius:16px;}
.hero-figure figcaption{
  position:absolute;left:14px;bottom:14px;right:14px;
  background:rgba(255,255,255,.92);
  border:1px solid var(--line);border-radius:10px;
  padding:8px 12px;font-size:12.5px;color:var(--ink-2);
}

/* ============ 通用板块 ============ */
.sec{padding:var(--sec) 0;}
.sec.tint{background:var(--tint);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:720px;margin-bottom:40px;}
.sec-head h2{
  font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:-.005em;
}
.sec-head p{margin-top:14px;font-size:16px;color:var(--ink-2);}
.sec-head .kicker{
  display:block;font-size:13px;font-weight:600;color:var(--brand);
  letter-spacing:.06em;margin-bottom:10px;
}
.rule-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start;
}
.rule-copy h3{font-size:19px;font-weight:600;color:var(--ink);margin-bottom:10px;}
.rule-copy p{font-size:16px;color:var(--ink-2);margin-bottom:16px;}
.rule-list{margin-top:6px;}
.rule-list li{
  position:relative;padding-left:26px;margin-bottom:14px;font-size:15.5px;color:var(--ink-2);
}
.rule-list li strong{color:var(--ink);font-weight:600;}
.rule-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:9px;height:9px;border-radius:2px;
  background:var(--brand-soft);border:1.5px solid var(--brand);
}
.figure-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.figure-card .fig-img{
  width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:0;
  background:var(--tint);
}
.figure-card .fig-body{padding:20px 22px 22px;}
.figure-card h4{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.figure-card p{font-size:14.5px;color:var(--ink-2);}
.figure-note{
  display:flex;gap:10px;align-items:flex-start;
  margin-top:16px;padding:12px 14px;background:var(--tint);
  border-radius:10px;font-size:13.5px;color:var(--ink-3);
}
.figure-note svg{width:16px;height:16px;color:var(--brand);flex-shrink:0;margin-top:3px;}

/* ============ 参数表 ============ */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
table.param{
  width:100%;min-width:720px;border-collapse:collapse;
  font-variant-numeric:tabular-nums;
}
table.param thead th{
  background:var(--tint);color:var(--ink);
  font-size:14px;font-weight:600;text-align:left;
  padding:16px 18px;border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.param thead th:first-child{width:170px;}
table.param tbody td{
  padding:15px 18px;font-size:14.5px;color:var(--ink-2);
  border-bottom:1px solid var(--line);vertical-align:top;
}
table.param tbody tr:last-child td{border-bottom:0;}
table.param tbody tr:hover td{background:#F8FCFD;}
table.param tbody td:first-child{color:var(--ink);font-weight:600;white-space:nowrap;}
.table-hint{
  display:none;padding:10px 18px;font-size:13px;color:var(--ink-3);
  background:#FBFDFE;border-top:1px solid var(--line);
}

/* ============ 流程 ============ */
.flow{
  position:relative;max-width:860px;
  padding-left:34px;
}
.flow::before{
  content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,rgba(10,126,140,.42),rgba(127,227,240,.5),rgba(10,126,140,.12));
  border-radius:2px;
}
.flow-item{position:relative;padding:0 0 30px 4px;}
.flow-item:last-child{padding-bottom:0;}
.flow-item::before{
  content:"";position:absolute;left:-31px;top:8px;
  width:16px;height:16px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);
}
.flow-item:nth-child(2)::before{border-color:var(--accent);}
.flow-num{
  display:inline-block;font-size:13px;font-weight:700;color:var(--brand);
  letter-spacing:.08em;margin-bottom:4px;font-variant-numeric:tabular-nums;
}
.flow-item:nth-child(2) .flow-num{color:var(--accent);}
.flow-item h3{font-size:18px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.flow-item p{font-size:15.5px;color:var(--ink-2);max-width:44em;}

/* ============ 对照卡 ============ */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.duo-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.duo-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(10,126,140,.3);}
.duo-card.mis{border-left:3px solid #C7D6DC;}
.duo-card.fix{border-left:3px solid var(--accent);}
.duo-card .duo-label{
  display:inline-flex;font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--ink-3);background:#F4F8FA;border-radius:var(--r-pill);
  padding:3px 11px;margin-bottom:12px;
}
.duo-card.fix .duo-label{color:var(--accent-dark);background:var(--accent-soft);}
.duo-card h3{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.duo-card p{font-size:14.5px;color:var(--ink-2);}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);max-width:900px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:14px;
  background:transparent;border:0;text-align:left;cursor:pointer;
  padding:20px 4px 20px 0;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.65;
  transition:color .15s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-idx{
  font-size:14px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;flex-shrink:0;padding-top:2px;
  transition:color .15s ease;
}
.faq-txt{flex:1;}
.faq-ic{
  position:relative;width:18px;height:18px;flex-shrink:0;margin-top:4px;
}
.faq-ic::before,.faq-ic::after{
  content:"";position:absolute;background:var(--ink-3);border-radius:2px;
  transition:transform .2s ease,background-color .2s ease;
}
.faq-ic::before{left:0;top:8px;width:18px;height:1.6px;}
.faq-ic::after{top:0;left:8px;width:1.6px;height:18px;}
.faq-item.open .faq-ic::after{transform:scaleY(0);}
.faq-item.open .faq-ic::before,.faq-item.open .faq-idx{color:var(--accent);}
.faq-item.open .faq-ic::before{background:var(--accent);}
.faq-item.open .faq-q{color:var(--brand-dark);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .28s ease;
}
.faq-a-inner{
  padding:0 34px 20px 30px;
  font-size:15px;color:var(--ink-2);line-height:1.85;max-width:52em;
  border-left:3px solid transparent;
}
.faq-item.open .faq-a-inner{border-left-color:var(--accent);padding-left:24px;}

/* ============ 窄条 CTA ============ */
.cta-strip{
  background:linear-gradient(180deg,#F3FAFB,#EDF5F7);
  border-top:1px solid var(--line);
  padding:34px 0;
}
.cta-strip-inner{
  display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;
}
.cta-strip h3{font-size:18px;font-weight:600;color:var(--ink);}
.cta-strip p{font-size:14px;color:var(--ink-3);margin-top:4px;}
.cta-strip-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);color:#C8D7DD;
  padding:64px 0 0;margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:16px;}
.site-footer .brand-txt{color:#fff;}
.site-footer .brand-txt em{color:var(--cool);}
.site-footer .brand-ic{color:var(--cool);}
.footer-brand p{font-size:14px;color:#A9BCC4;line-height:1.85;max-width:30em;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.footer-tags span{
  font-size:12px;color:#9FB6BF;
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-pill);padding:4px 11px;
}
.footer-col h4{
  font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:#A9BCC4;}
.footer-col ul a:hover{color:var(--cool);}
.footer-note{font-size:13.5px;color:#8FA6AF;line-height:1.85;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;font-size:13px;color:#8FA6AF;
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero-grid{gap:32px;}
  .rule-grid{gap:32px;}
}
@media (max-width:991px){
  :root{--sec:64px;}
  .main-nav{display:none;}
  .nav-search{display:none;}
  .nav-toggle{display:flex;}
  .hero-grid{grid-template-columns:1fr;gap:30px;}
  .hero-figure{order:-1;}
  .rule-grid{grid-template-columns:1fr;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .sec-head{margin-bottom:32px;}
}
@media (max-width:767px){
  :root{--sec:48px;}
  .container{padding:0 20px;}
  body{font-size:15.5px;}
  .page-hero{padding:36px 0 44px;}
  .hero-sub{font-size:16px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 auto;justify-content:center;}
  .duo{grid-template-columns:1fr;}
  .table-hint{display:block;}
  .flow{padding-left:28px;}
  .flow::before{left:8px;}
  .flow-item::before{left:-26px;width:14px;height:14px;}
  .faq-q{font-size:15px;padding:17px 0;}
  .faq-a-inner{padding:0 10px 18px 26px;}
  .faq-item.open .faq-a-inner{padding-left:20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-strip-inner{flex-direction:column;align-items:flex-start;}
  .cta-strip-actions{width:100%;}
  .cta-strip-actions .btn{flex:1 1 auto;justify-content:center;}
  .header-inner{gap:10px;}
  .brand-txt{font-size:16px;}
  .header-cta{display:none;}
}
@media (max-width:420px){
  .brand-txt{font-size:15px;}
  .brand-ic{width:22px;height:22px;}
  .btn{font-size:14px;padding:0 18px;}
}

/* roulang page: category3 */
:root{
    --brand:#0A7E8C;
    --brand-deep:#075963;
    --accent:#FF7A3D;
    --accent-deep:#E8641F;
    --cool:#7FE3F0;
    --bg:#F5F9FB;
    --surface:#FFFFFF;
    --soft:#EDF5F7;
    --soft-2:#F2F7F9;
    --ink:#0D1B21;
    --ink-2:#465A64;
    --ink-3:#7C8E97;
    --line:#DCE7EC;
    --r-card:14px;
    --r-btn:10px;
    --r-pill:999px;
    --r-img:12px;
    --sh-1:0 1px 2px rgba(13,27,33,.06);
    --sh-2:0 12px 28px -18px rgba(13,27,33,.30);
    --sec:72px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--ink-2);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700;line-height:1.35;}
  p{margin:0 0 14px;}
  p:last-child{margin-bottom:0;}
  a{color:var(--brand);text-decoration:none;transition:color .15s ease;}
  a:hover{color:var(--brand-deep);}
  img{max-width:100%;display:block;}
  ul,ol{margin:0;padding:0;list-style:none;}
  figure{margin:0;}
  button{font-family:inherit;}
  :focus-visible{outline:2px solid rgba(10,126,140,.45);outline-offset:2px;border-radius:4px;}
  ::selection{background:rgba(127,227,240,.5);color:var(--ink);}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
    cursor:pointer;text-decoration:none;
    transition:transform .15s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
  }
  .btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px -12px rgba(232,100,31,.9);}
  .btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px);}
  .btn-accent:active{transform:translateY(0);}
  .btn-ghost{background:#fff;color:var(--brand);border-color:rgba(10,126,140,.35);}
  .btn-ghost:hover{background:#E6F4F6;color:var(--brand-deep);border-color:var(--brand);}
  .btn-quiet{background:var(--soft);color:var(--brand-deep);border-color:transparent;}
  .btn-quiet:hover{background:#E1EEF2;color:var(--brand-deep);}
  .btn-lg{height:48px;padding:0 26px;font-size:16px;}
  .btn-sm{height:36px;padding:0 14px;font-size:13px;border-radius:8px;}

  /* ---------- 徽章 / 标签 ---------- */
  .badge-soft{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;
    border-radius:var(--r-pill);background:#E6F4F6;color:var(--brand);
    font-size:12px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
  }
  .badge-float{
    position:absolute;left:12px;top:12px;z-index:2;
    display:inline-flex;align-items:center;height:24px;padding:0 10px;
    border-radius:var(--r-pill);background:rgba(255,255,255,.94);
    color:var(--brand-deep);font-size:12px;font-weight:600;
    border:1px solid rgba(10,126,140,.18);
  }
  .tag{
    display:inline-flex;align-items:center;padding:3px 10px;
    border-radius:var(--r-pill);background:var(--soft-2);
    border:1px solid var(--line);color:var(--ink-2);font-size:12px;
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:6px;}

  /* ---------- 页头 ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;background:#fff;
    border-bottom:1px solid var(--line);transition:box-shadow .2s ease;
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px -16px rgba(13,27,33,.45);}
  .header-inner{display:flex;align-items:center;gap:20px;height:70px;}
  .brand{display:inline-flex;align-items:center;gap:10px;flex:none;color:var(--ink);font-size:18px;font-weight:700;letter-spacing:-.01em;}
  .brand:hover{color:var(--ink);}
  .brand-ic{width:26px;height:26px;color:var(--brand);flex:none;}
  .brand-txt em{font-style:normal;color:var(--brand);}

  .main-nav{display:flex;align-items:center;gap:2px;margin-left:6px;}
  .main-nav a{
    position:relative;display:inline-flex;align-items:center;height:70px;
    padding:0 11px;font-size:15px;font-weight:500;color:var(--ink-2);
    transition:color .15s ease;white-space:nowrap;
  }
  .main-nav a:hover{color:var(--brand);}
  .main-nav a.active{color:var(--brand);font-weight:600;}
  .main-nav a.active::after{
    content:"";position:absolute;left:11px;right:11px;bottom:0;height:2px;
    background:var(--brand);border-radius:2px;
  }

  .header-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
  .nav-search{position:relative;display:flex;align-items:center;}
  .nav-search svg{position:absolute;left:13px;width:16px;height:16px;color:var(--ink-3);pointer-events:none;}
  .nav-search input{
    width:186px;height:40px;border-radius:var(--r-pill);
    border:1px solid transparent;background:var(--soft-2);
    padding:0 14px 0 36px;font-size:14px;color:var(--ink);
    transition:background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
  }
  .nav-search input::placeholder{color:var(--ink-3);}
  .nav-search input:focus{
    outline:none;background:#fff;border-color:var(--brand);
    box-shadow:0 0 0 4px rgba(10,126,140,.12);
  }
  .nav-toggle{
    display:none;width:42px;height:42px;border-radius:10px;
    border:1px solid var(--line);background:#fff;color:var(--ink);
    align-items:center;justify-content:center;cursor:pointer;
  }
  .nav-toggle:hover{background:var(--soft);color:var(--brand-deep);}
  .nav-toggle svg{width:20px;height:20px;}

  .mobile-drawer{
    display:none;border-top:1px solid var(--line);background:#fff;
    padding:14px 0 18px;
  }
  .mobile-drawer.open{display:block;}
  .mobile-drawer a{
    display:flex;align-items:center;justify-content:space-between;
    padding:11px 24px;color:var(--ink-2);font-size:15px;font-weight:500;
  }
  .mobile-drawer a:hover,.mobile-drawer a.active{color:var(--brand);background:var(--soft);}
  .mobile-drawer .drawer-cta{padding:14px 24px 0;}

  /* ---------- 内页首屏 ---------- */
  .page-hero{
    position:relative;overflow:hidden;
    padding:44px 0 68px;
    background:linear-gradient(180deg,#F8FCFD 0%,var(--bg) 100%);
  }
  .page-hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:repeating-linear-gradient(115deg,rgba(10,126,140,.045) 0 1px,transparent 1px 28px);
  }
  .page-hero > .container{position:relative;z-index:1;}
  .crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:22px;flex-wrap:wrap;}
  .crumbs a{color:var(--ink-3);}
  .crumbs a:hover{color:var(--brand);}
  .crumbs .sep{color:#BCCED6;}
  .crumbs .cur{color:var(--ink-2);}

  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;
    border-radius:var(--r-pill);background:#E6F4F6;color:var(--brand-deep);
    font-size:13px;font-weight:600;margin-bottom:16px;
  }
  .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);}
  .page-hero h1{
    font-size:clamp(28px,3.6vw,42px);line-height:1.25;letter-spacing:-.01em;
    margin-bottom:16px;
  }
  .page-hero h1 span{color:var(--brand-deep);}
  .lead{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:36em;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
  .hero-metrics{display:flex;margin-top:32px;padding-top:20px;border-top:1px solid var(--line);}
  .metric{flex:1;padding-right:18px;border-right:1px solid var(--line);}
  .metric:last-child{border-right:0;padding-right:0;}
  .metric b{
    display:block;font-size:24px;font-weight:700;color:var(--brand);
    font-variant-numeric:tabular-nums;line-height:1.3;
  }
  .metric span{font-size:13px;color:var(--ink-3);}
  .hero-figure{position:relative;}
  .hero-figure img{
    width:100%;aspect-ratio:16/10;object-fit:cover;
    border-radius:16px;box-shadow:var(--sh-2);border:1px solid rgba(255,255,255,.7);
    background:var(--soft);
  }

  /* ---------- 锚点条 ---------- */
  .anchor-bar{
    position:sticky;top:70px;z-index:40;
    background:rgba(245,249,251,.94);
    border-bottom:1px solid var(--line);
    backdrop-filter:saturate(120%) blur(6px);
  }
  .anchor-inner{display:flex;align-items:center;gap:10px;padding:12px 0;overflow-x:auto;scrollbar-width:none;}
  .anchor-inner::-webkit-scrollbar{display:none;}
  .anchor-label{font-size:13px;color:var(--ink-3);white-space:nowrap;padding-right:4px;}
  .chip{
    display:inline-flex;align-items:center;height:32px;padding:0 14px;white-space:nowrap;
    border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;
    font-size:13px;font-weight:600;color:var(--ink-2);
    transition:all .18s ease;
  }
  .chip:hover{border-color:rgba(10,126,140,.4);color:var(--brand);background:#F4FBFC;}
  .chip.active{background:var(--brand);border-color:var(--brand);color:#fff;}

  /* ---------- 板块 ---------- */
  .section{padding:var(--sec) 0;}
  .section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  section[id]{scroll-margin-top:130px;}
  .section-head{max-width:760px;margin-bottom:34px;}
  .section-head h2{font-size:clamp(22px,2.5vw,30px);margin-bottom:12px;letter-spacing:-.01em;}
  .section-head p{color:var(--ink-2);font-size:16px;}
  .kicker{
    display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;
    color:var(--brand);margin-bottom:10px;
  }

  /* ---------- 主题卡片墙 ---------- */
  .theme-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
  .theme-card{
    position:relative;display:flex;flex-direction:column;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--sh-1);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .theme-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(10,126,140,.32);}
  .theme-card.featured{grid-column:span 2;}
  .theme-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--soft);}
  .theme-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
  .theme-card:hover .theme-media img{transform:scale(1.04);}
  .theme-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1;}
  .theme-body h3{font-size:17px;font-weight:600;line-height:1.45;color:var(--ink);}
  .theme-card:hover .theme-body h3{color:var(--brand);}
  .theme-body p{font-size:14px;line-height:1.75;color:var(--ink-2);margin:0;}
  .theme-body .tag-row{margin-top:auto;padding-top:12px;}
  .theme-card .theme-more{
    font-size:13px;font-weight:600;color:var(--brand);
    display:inline-flex;align-items:center;gap:6px;margin-top:12px;
  }
  .theme-card .theme-more svg{width:14px;height:14px;transition:transform .2s ease;}
  .theme-card:hover .theme-more svg{transform:translateX(3px);}

  /* ---------- 图文分区 ---------- */
  .split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
  .split.reverse .split-media{order:2;}
  .split-media img{
    width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);
    border:1px solid var(--line);box-shadow:var(--sh-1);background:var(--soft);
  }
  .split-copy h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:14px;}
  .split-copy p{font-size:15.5px;line-height:1.85;color:var(--ink-2);}

  .spec-table{width:100%;border-collapse:collapse;margin-top:22px;font-size:14px;}
  .spec-table caption{
    caption-side:top;text-align:left;font-size:13px;color:var(--ink-3);
    padding-bottom:8px;
  }
  .spec-table th,.spec-table td{
    padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);
    vertical-align:middle;
  }
  .spec-table thead th{
    background:var(--soft);color:var(--ink);font-weight:600;font-size:13px;
    border-bottom:1px solid var(--line);
  }
  .spec-table tbody tr{transition:background-color .15s ease;}
  .spec-table tbody tr:hover{background:#F8FCFD;}
  .spec-table tbody tr:last-child td{border-bottom:0;}
  .spec-table td strong{color:var(--ink);font-weight:600;}
  .table-wrap{
    border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:#fff;
  }
  .table-scroll{overflow-x:auto;}

  /* ---------- 步骤列表 ---------- */
  .step-list{display:flex;flex-direction:column;gap:16px;margin-top:22px;}
  .step{
    display:flex;gap:14px;padding:16px 18px;background:#fff;
    border:1px solid var(--line);border-radius:var(--r-card);transition:border-color .2s ease,box-shadow .2s ease;
  }
  .step:hover{border-color:rgba(10,126,140,.32);box-shadow:var(--sh-1);}
  .step-idx{
    flex:none;width:30px;height:30px;border-radius:9px;background:var(--soft);
    color:var(--brand-deep);font-weight:700;font-size:14px;
    display:flex;align-items:center;justify-content:center;
    font-variant-numeric:tabular-nums;
  }
  .step-body h4{font-size:15px;font-weight:600;margin-bottom:4px;color:var(--ink);}
  .step-body p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.75;}

  /* ---------- 提示条 ---------- */
  .notice{
    display:flex;gap:12px;padding:16px 18px;border-radius:var(--r-card);
    background:#FFF6F1;border:1px solid rgba(255,122,61,.28);
    margin-top:24px;
  }
  .notice svg{flex:none;width:20px;height:20px;color:var(--accent-deep);margin-top:3px;}
  .notice p{font-size:14px;color:#8A4520;margin:0;line-height:1.75;}

  /* ---------- FAQ ---------- */
  .faq-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);}
  .faq-item + .faq-item{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;display:flex;align-items:flex-start;gap:14px;
    padding:18px 22px;background:transparent;border:0;text-align:left;
    font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;
    transition:color .18s ease,background-color .18s ease;
  }
  .faq-q:hover{color:var(--brand);background:#FAFDFE;}
  .faq-idx{
    flex:none;font-size:14px;font-weight:700;color:var(--brand);
    font-variant-numeric:tabular-nums;line-height:1.9;
  }
  .faq-txt{flex:1;line-height:1.7;}
  .faq-plus{
    position:relative;flex:none;width:16px;height:16px;margin-top:6px;
  }
  .faq-plus::before,.faq-plus::after{
    content:"";position:absolute;background:var(--ink-3);border-radius:2px;
    transition:transform .22s ease,background-color .22s ease;
  }
  .faq-plus::before{left:0;top:7px;width:16px;height:2px;}
  .faq-plus::after{left:7px;top:0;width:2px;height:16px;}
  .faq-item.open .faq-plus::after{transform:rotate(90deg);}
  .faq-item.open .faq-plus::before,.faq-item.open .faq-plus::after{background:var(--accent);}
  .faq-item.open .faq-q{color:var(--brand-deep);}
  .faq-item.open .faq-idx{color:var(--accent);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
  .faq-a p{
    padding:0 22px 20px 50px;font-size:15px;line-height:1.85;color:var(--ink-2);margin:0;
  }
  .faq-item.open{border-left:3px solid var(--accent);}

  /* ---------- CTA 窄条 ---------- */
  .cta-strip{background:var(--soft);border-top:1px solid var(--line);}
  .cta-strip-inner{
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    padding:22px 0;
  }
  .cta-strip-copy{display:flex;flex-direction:column;gap:2px;}
  .cta-strip-copy strong{font-size:16px;color:var(--ink);}
  .cta-strip-copy span{font-size:13px;color:var(--ink-3);}
  .cta-strip-actions{display:flex;flex-wrap:wrap;gap:10px;}

  /* ---------- 页脚 ---------- */
  .site-footer{background:#0D1B21;color:#A9BCC4;padding:56px 0 0;font-size:14px;}
  .footer-grid{
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:36px;
    padding-bottom:40px;
  }
  .site-footer .brand{color:#fff;font-size:17px;margin-bottom:14px;}
  .site-footer .brand:hover{color:#fff;}
  .site-footer .brand-ic{color:var(--cool);}
  .site-footer .brand-txt em{color:var(--cool);}
  .site-footer p{color:#A9BCC4;font-size:14px;line-height:1.8;}
  .footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
  .footer-tags span{
    font-size:12px;padding:3px 10px;border-radius:var(--r-pill);
    background:rgba(127,227,240,.10);color:#9FD8E2;border:1px solid rgba(127,227,240,.18);
  }
  .footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;}
  .footer-col ul{display:flex;flex-direction:column;gap:9px;}
  .footer-col ul a{color:#A9BCC4;font-size:14px;}
  .footer-col ul a:hover{color:var(--cool);}
  .footer-note{font-size:13px;line-height:1.85;color:#8FA5AE;}
  .footer-bottom{
    display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
    padding:18px 0;border-top:1px solid rgba(255,255,255,.08);
    font-size:13px;color:#8FA5AE;
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1199px){
    .nav-search input{width:150px;}
    .main-nav a{padding:0 8px;font-size:14.5px;}
    .theme-wall{grid-template-columns:repeat(2,1fr);}
    .theme-card.featured{grid-column:span 2;}
    .split{gap:32px;}
  }
  @media (max-width:1024px){
    :root{--sec:60px;}
    .hero-grid{grid-template-columns:1fr;gap:34px;}
    .hero-figure{order:-1;}
    .hero-figure img{aspect-ratio:16/9;border-radius:14px;}
    .split{grid-template-columns:1fr;gap:26px;}
    .split.reverse .split-media{order:-1;}
    .split-media img{aspect-ratio:16/9;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  }
  @media (max-width:900px){
    .main-nav,.nav-search{display:none;}
    .nav-toggle{display:inline-flex;}
    .header-inner{height:64px;gap:12px;}
    .anchor-bar{top:64px;}
  }
  @media (max-width:768px){
    .container{padding:0 20px;}
    .page-hero{padding:26px 0 48px;}
    .lead{font-size:16px;}
    .hero-actions .btn{flex:1 1 auto;}
    .hero-metrics{flex-wrap:wrap;gap:16px 0;}
    .metric{flex:1 1 50%;border-right:0;padding-right:0;}
    .theme-wall{grid-template-columns:1fr;}
    .theme-card.featured{grid-column:span 1;}
    .section-head{margin-bottom:26px;}
    .faq-q{padding:16px 18px;font-size:15px;}
    .faq-a p{padding:0 18px 18px 46px;}
    .cta-strip-inner{flex-direction:column;align-items:flex-start;gap:14px;}
    .cta-strip-actions{width:100%;}
    .cta-strip-actions .btn{flex:1 1 auto;}
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .footer-bottom{flex-direction:column;gap:6px;}
  }
  @media (max-width:520px){
    .page-hero h1{font-size:26px;}
    .hero-metrics .metric b{font-size:20px;}
    .spec-table th,.spec-table td{padding:10px;font-size:13px;}
    .btn-lg{width:100%;}
  }

/* roulang page: category4 */
:root{
  --brand:#0A7E8C;
  --brand-deep:#075963;
  --accent:#FF7A3D;
  --accent-deep:#E8641F;
  --cool:#7FE3F0;
  --bg:#F5F9FB;
  --surface:#FFFFFF;
  --tint:#EDF5F7;
  --tint-2:#F2F7F9;
  --ink:#0D1B21;
  --ink-2:#465A64;
  --ink-3:#7C8E97;
  --line:#DCE7EC;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(13,27,33,.06);
  --sh-2:0 12px 28px -18px rgba(13,27,33,.30);
  --sec:88px;
}
@media (max-width:1199px){:root{--sec:64px}}
@media (max-width:767px){:root{--sec:48px}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-deep)}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{color:var(--ink);font-weight:700;letter-spacing:-.01em;margin:0}
p{margin:0 0 1em}
:focus-visible{outline:2px solid rgba(10,126,140,.55);outline-offset:2px;border-radius:6px}

.container,
.container-fluid{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (max-width:767px){
  .container,.container-fluid{padding-left:20px;padding-right:20px}
}

/* ============ 按钮 ============ */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -14px rgba(255,122,61,.95)}
.btn-accent:active{transform:translateY(0);background:#D65A19;color:#fff}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(10,126,140,.45)}
.btn-outline:hover{background:var(--tint);color:var(--brand-deep);border-color:var(--brand)}
.btn-outline:active{background:#E2EFF2;color:var(--brand-deep)}
.btn-quiet{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);background:none;border:0;padding:0;cursor:pointer}
.btn-quiet:hover{color:var(--brand-deep)}
.btn-sm-x{height:38px;padding:0 16px;font-size:14px;border-radius:9px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 22px -16px rgba(13,27,33,.55)}
.header-inner{display:flex;align-items:center;gap:22px;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap}
.brand:hover{color:var(--ink)}
.brand-ic{width:26px;height:26px;color:var(--brand);flex:none}
.brand-txt em{font-style:normal;color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:6px;list-style:none}
.main-nav a{
  position:relative;display:inline-block;padding:24px 0;
  font-size:15px;color:var(--ink-2);transition:color .15s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:center;
  transition:transform .18s ease;border-radius:2px;
}
.main-nav a:hover{color:var(--brand)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:var(--ink);font-weight:600}
.main-nav a.active::after{transform:scaleX(1)}
.header-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search svg{position:absolute;left:13px;width:16px;height:16px;color:var(--ink-3);pointer-events:none}
.nav-search input{
  width:196px;height:40px;border-radius:999px;border:1px solid transparent;
  background:var(--tint-2);padding:0 14px 0 37px;font-size:14px;color:var(--ink);
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease,width .18s ease;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:hover{background:#EAF2F5}
.nav-search input:focus{
  outline:none;background:#fff;border-color:var(--brand);width:220px;
  box-shadow:0 0 0 3px rgba(10,126,140,.14);
}
.nav-cta{height:40px;padding:0 18px;font-size:14px;border-radius:999px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle svg{width:20px;height:20px;color:var(--ink)}
.nav-toggle:hover{border-color:rgba(10,126,140,.4);background:var(--tint)}

.drawer{display:none;background:#fff;border-top:1px solid var(--line);padding:8px 20px 20px}
.drawer.open{display:block}
.drawer a{
  display:block;padding:13px 2px;font-size:15px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer a:hover{color:var(--brand)}
.drawer a.active{color:var(--brand);font-weight:600}
.drawer .btn-x{width:100%;margin-top:16px}

@media (max-width:991px){
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:inline-flex}
}
@media (max-width:575px){
  .nav-cta{display:none}
  .header-inner{height:64px;gap:12px}
  .brand{font-size:16px}
}

/* ============ 面包屑 ============ */
.crumb-bar{padding:18px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3)}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--line)}
.crumb .now{color:var(--ink-2)}

/* ============ Hero ============ */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.16}
.hero-lines{position:absolute;inset:0;background-image:repeating-linear-gradient(115deg,rgba(10,126,140,.07) 0 1px,transparent 1px 16px);opacity:.75}
.hero-inner{position:relative;z-index:1;max-width:820px;padding:44px 0 18px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);
  background:#fff;border:1px solid rgba(10,126,140,.24);border-radius:999px;padding:6px 14px;
  box-shadow:var(--sh-1);
}
.eyebrow svg{width:15px;height:15px}
.page-hero h1{font-size:clamp(28px,4vw,42px);line-height:1.25;margin:18px 0 14px;color:var(--ink)}
.hero-lead{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:680px;margin:0}
.mini-stats{display:flex;flex-wrap:wrap;gap:30px;margin:28px 0 0;padding-top:20px;border-top:1px dashed var(--line)}
.mini-stat{position:relative;display:flex;flex-direction:column;gap:2px;padding-right:30px}
.mini-stat:last-child{padding-right:0}
.mini-stat + .mini-stat::before{content:"";position:absolute;left:-15px;top:5px;bottom:5px;width:1px;background:var(--line)}
.mini-stat b{font-size:22px;line-height:1.25;color:var(--brand);font-variant-numeric:tabular-nums}
.mini-stat span{font-size:13px;color:var(--ink-3)}

.anchor-wrap{position:relative;z-index:1;padding:24px 0 26px}
.anchor-bar{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:14px;color:var(--ink-2);
  transition:border-color .16s ease,color .16s ease,background .16s ease,transform .16s ease;
}
.chip:hover{color:var(--brand);border-color:rgba(10,126,140,.45);background:var(--tint);transform:translateY(-1px)}
.chip b{font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;font-size:13px}

/* ============ 主体 ============ */
.section{padding:var(--sec) 0 0}
.faq-main{max-width:900px}
.group{margin-bottom:52px;scroll-margin-top:96px}
.group-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:4px;
}
.group-head h2{display:flex;align-items:center;gap:10px;font-size:clamp(20px,2.2vw,24px);margin:0}
.group-head .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);flex:none}
.group-head .count{font-size:13px;color:var(--ink-3);white-space:nowrap;font-variant-numeric:tabular-nums}

/* 手风琴 */
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-width:0;--bs-accordion-btn-focus-box-shadow:none;--bs-accordion-body-padding-x:0}
.accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);
  border-left:3px solid transparent;padding-left:16px;
  transition:border-left-color .18s ease,background .18s ease;
}
.accordion-item:hover{background:#FAFDFE}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left-color:var(--accent);background:#FCFEFE}
.accordion-header{margin:0}
.accordion-button{
  display:flex;align-items:flex-start;gap:14px;width:100%;
  padding:19px 6px 19px 0;background:transparent;border:0;
  font-size:16px;font-weight:600;color:var(--ink);text-align:left;box-shadow:none;
  transition:color .16s ease;
}
.accordion-button:hover{color:var(--brand)}
.accordion-button:not(.collapsed){color:var(--ink);box-shadow:none}
.accordion-button::after{display:none!important}
.q-num{
  flex:none;font-size:13px;font-weight:700;line-height:1.9;letter-spacing:.02em;
  color:var(--brand);font-variant-numeric:tabular-nums;min-width:22px;
  transition:color .16s ease;
}
.accordion-button:not(.collapsed) .q-num{color:var(--accent-deep)}
.q-txt{flex:1;min-width:0}
.plus{position:relative;flex:none;width:14px;height:14px;margin-top:7px}
.plus::before,.plus::after{content:"";position:absolute;background:var(--ink-3);border-radius:2px;transition:transform .2s ease,background .2s ease}
.plus::before{left:0;top:6px;width:14px;height:1.6px}
.plus::after{left:6px;top:0;width:1.6px;height:14px}
.accordion-button:not(.collapsed) .plus::before{background:var(--accent-deep)}
.accordion-button:not(.collapsed) .plus::after{transform:scaleY(0);background:var(--accent-deep)}
.accordion-body{
  padding:0 40px 22px 36px;font-size:15px;line-height:1.85;color:var(--ink-2);
}
.accordion-body p{margin:0 0 10px}
.accordion-body p:last-child{margin-bottom:0}
.accordion-body em{font-style:normal;color:var(--brand-deep);font-weight:600}

/* 自查清单 */
.selfcheck-wrap{padding:var(--sec) 0 0}
.selfcheck{
  display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:30px;
}
.selfcheck h2{font-size:clamp(20px,2.2vw,26px);margin:0 0 6px}
.selfcheck .sub{font-size:14px;color:var(--ink-3);margin:0 0 20px}
.check-list{list-style:none;display:grid;gap:12px;margin:0}
.check-list li{display:flex;gap:11px;font-size:15px;line-height:1.75;color:var(--ink-2)}
.check-list svg{flex:none;width:20px;height:20px;color:var(--brand);margin-top:3px}
.figure{margin:0}
.figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--line);background:var(--tint);
}
.figure figcaption{font-size:13px;color:var(--ink-3);margin-top:10px;line-height:1.7}
.related-entry{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.related-entry .chip{height:36px;font-size:13.5px}
@media (max-width:991px){
  .selfcheck{grid-template-columns:1fr;gap:24px;padding:24px}
}

/* 底部窄条 */
.strip{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  background:var(--tint);border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 24px;margin:var(--sec) 0 0;
}
.strip p{margin:0;font-size:15px;color:var(--ink-2)}
.strip p b{color:var(--ink)}
.strip .btns{display:flex;gap:10px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:#0D1B21;color:#A9BCC4;padding:56px 0 0;margin-top:var(--sec)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:36px}
.footer-brand .brand{color:#fff;font-size:18px;margin-bottom:14px}
.footer-brand .brand:hover{color:#fff}
.footer-brand .brand-ic{color:var(--cool)}
.footer-brand .brand-txt em{color:var(--cool)}
.footer-brand p{font-size:14px;line-height:1.85;color:#93A9B2;margin:0 0 16px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags span{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
  font-size:12px;color:#A9BCC4;border:1px solid rgba(255,255,255,.14);
}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin:0 0 14px}
.footer-col ul{list-style:none}
.footer-col li a{display:inline-block;padding:5px 0;font-size:14px;color:#A9BCC4}
.footer-col li a:hover{color:var(--cool)}
.footer-note{font-size:13px;line-height:1.85;color:#8FA5AE;margin:0}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:40px;padding:18px 0;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:#7C8E97;
}
@media (max-width:991px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:575px){
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding-top:40px}
}

/* 覆盖 Bootstrap 默认组件味道 */
.btn{--bs-btn-focus-box-shadow:0 0 0 3px rgba(10,126,140,.18)}
.card{border-radius:var(--r-card);border-color:var(--line);box-shadow:var(--sh-1)}
.badge{border-radius:999px;background:var(--tint);color:var(--brand);font-weight:600}
.form-control{border-radius:var(--r-btn);border:1px solid var(--line);height:48px}
.form-control:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(10,126,140,.16)}
.breadcrumb{background:transparent;padding:0;margin:0}

/* roulang page: category5 */
:root{
  --brand:#0A7E8C;
  --brand-deep:#075963;
  --accent:#FF7A3D;
  --accent-deep:#E8641F;
  --cool:#7FE3F0;
  --bg:#F5F9FB;
  --surface:#FFFFFF;
  --tint:#EDF5F7;
  --ink:#0D1B21;
  --ink-2:#465A64;
  --ink-3:#7C8E97;
  --line:#DCE7EC;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(13,27,33,.06);
  --sh-2:0 12px 28px -18px rgba(13,27,33,.30);
  --sec:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .15s ease;}
a:hover{color:var(--brand-deep);}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid rgba(10,126,140,.45);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(28px,4vw,44px);line-height:1.25;}
h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;}
h3{font-size:19px;font-weight:600;line-height:1.5;}
p{margin:0 0 14px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sec) 0;}
.section-tint{background:var(--tint);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);background:rgba(127,227,240,.22);
  border:1px solid rgba(10,126,140,.16);
  padding:5px 14px;border-radius:var(--r-pill);
  margin-bottom:16px;
}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head p{font-size:16px;color:var(--ink-2);margin-top:12px;}
.muted{color:var(--ink-3);font-size:13px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(140%) blur(6px);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-2);}
.header-inner{display:flex;align-items:center;gap:20px;height:70px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-ic{width:28px;height:28px;color:var(--brand);}
.brand-txt{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;line-height:1;}
.brand-txt em{font-style:normal;color:var(--brand);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;font-weight:500;
  color:var(--ink-2);
  border-radius:8px;
  white-space:nowrap;
}
.main-nav a:hover{color:var(--brand);background:var(--tint);}
.main-nav a.active{color:var(--brand);font-weight:600;}
.main-nav a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box svg{
  position:absolute;left:12px;width:16px;height:16px;color:var(--ink-3);pointer-events:none;
}
.search-box input{
  width:196px;height:40px;
  padding:0 14px 0 36px;
  font-size:14px;color:var(--ink);
  background:#F2F7F9;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  transition:background .15s ease,border-color .15s ease,box-shadow .15s ease;
}
.search-box input::placeholder{color:var(--ink-3);}
.search-box input:focus{
  outline:none;background:#fff;border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(10,126,140,.14);
}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink);
  align-items:center;justify-content:center;
  cursor:pointer;
  margin-left:auto;
}
.nav-toggle svg{width:20px;height:20px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  font-size:15px;font-weight:600;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:background .15s ease,color .15s ease,border-color .15s ease,transform .15s ease,box-shadow .15s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:8px;}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 18px -12px rgba(255,122,61,.9);}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px);}
.btn-accent:active{transform:translateY(0);}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(10,126,140,.45);}
.btn-outline:hover{background:rgba(10,126,140,.08);color:var(--brand-deep);border-color:var(--brand);}
.btn-ghost{background:transparent;color:var(--brand);padding:0 12px;height:38px;font-size:14px;}
.btn-ghost:hover{background:rgba(10,126,140,.08);color:var(--brand-deep);}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- badges & chips ---------- */
.badge-cat{
  display:inline-flex;align-items:center;
  padding:3px 11px;
  font-size:12px;font-weight:600;line-height:1.7;
  color:var(--brand);
  background:rgba(127,227,240,.24);
  border-radius:var(--r-pill);
}
.badge-soft{
  display:inline-flex;align-items:center;
  padding:3px 11px;font-size:12px;font-weight:600;
  color:var(--ink-2);background:#F1F6F8;border-radius:var(--r-pill);
}
.chip-bar{
  position:sticky;top:70px;z-index:900;
  background:rgba(245,249,251,.94);
  border-bottom:1px solid var(--line);
  padding:14px 0;
  backdrop-filter:blur(6px);
}
.chip-track{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px;}
.chip-track::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 16px;
  font-size:14px;font-weight:500;color:var(--ink-2);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  transition:all .15s ease;
  white-space:nowrap;
}
.chip span{font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums;}
.chip:hover{color:var(--brand);border-color:rgba(10,126,140,.4);background:#F8FCFD;}
.chip:hover span{color:var(--brand);}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:72px 0 64px;
  background:
    repeating-linear-gradient(135deg,rgba(10,126,140,.05) 0 1px,transparent 1px 14px),
    linear-gradient(180deg,#F8FCFD 0%,#F5F9FB 100%);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero-copy h1{margin-bottom:18px;}
.hero-copy h1 .hl{color:var(--brand);}
.hero-sub{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:520px;margin-bottom:28px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px;}
.hero-figure{position:relative;}
.hero-img-wrap{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  box-shadow:var(--sh-2);
  border:1px solid rgba(10,126,140,.14);
  aspect-ratio:4/3;
  background:var(--tint);
}
.hero-img-wrap img{width:100%;height:100%;object-fit:cover;}
.hero-float{
  position:absolute;left:-14px;bottom:-18px;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:12px 16px;box-shadow:var(--sh-2);
  display:flex;align-items:center;gap:10px;
}
.hero-float strong{font-size:20px;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1;}
.hero-float span{font-size:12px;color:var(--ink-3);line-height:1.4;}

/* ---------- term groups ---------- */
.group-block{margin-bottom:56px;}
.group-block:last-child{margin-bottom:0;}
.group-head{display:flex;align-items:center;gap:14px;margin-bottom:22px;flex-wrap:wrap;}
.group-index{
  width:40px;height:40px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--brand);
  background:rgba(127,227,240,.26);
  border-radius:12px;
  font-variant-numeric:tabular-nums;
}
.group-head h2{font-size:clamp(20px,2.2vw,24px);}
.group-head .badge-soft{margin-left:auto;}
.term-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px 24px;margin:0;
}
.term-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:18px 20px;
  box-shadow:var(--sh-1);
  transition:border-color .15s ease,box-shadow .15s ease,transform .15s ease;
}
.term-item:hover{
  border-color:rgba(10,126,140,.4);
  box-shadow:var(--sh-2);
  transform:translateY(-2px);
}
.term-item dt{
  display:flex;align-items:center;gap:8px;
  font-size:16px;font-weight:600;color:var(--ink);
  margin-bottom:6px;
}
.term-item dt::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--brand);flex:0 0 auto;
}
.term-item dd{
  margin:0;
  font-size:14.5px;line-height:1.8;color:var(--ink-2);
}
.term-item dd .muted{display:block;margin-top:6px;font-size:12.5px;}

/* ---------- how to use ---------- */
.use-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:start;}
.use-list{display:grid;gap:14px;}
.use-item{
  display:flex;gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:18px 20px;
  box-shadow:var(--sh-1);
  transition:border-color .15s ease,box-shadow .15s ease;
}
.use-item:hover{border-color:rgba(10,126,140,.4);box-shadow:var(--sh-2);}
.use-num{
  font-size:15px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;
  width:30px;flex:0 0 auto;
}
.use-item h3{font-size:16px;margin-bottom:4px;}
.use-item p{font-size:14.5px;color:var(--ink-2);margin:0;}
.note-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--brand);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
}
.note-card h3{margin-bottom:10px;}
.note-card ul{display:grid;gap:10px;margin-top:14px;}
.note-card li{
  position:relative;padding-left:22px;
  font-size:14.5px;color:var(--ink-2);
}
.note-card li::before{
  content:"";position:absolute;left:0;top:9px;
  width:10px;height:6px;
  border-left:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);
}

/* ---------- related cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(10,126,140,.4);}
.rel-thumb{aspect-ratio:16/9;background:var(--tint);overflow:hidden;}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.04);}
.rel-body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.rel-body h3{font-size:16px;line-height:1.5;}
.rel-card:hover h3{color:var(--brand);}
.rel-body p{font-size:13.5px;line-height:1.7;color:var(--ink-3);margin:0;}
.rel-link{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--brand);}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  position:relative;
  display:flex;align-items:flex-start;gap:14px;
  padding:20px 40px 20px 0;
  font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
  transition:color .15s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";
  position:absolute;right:6px;top:26px;
  width:12px;height:12px;
  border-right:2px solid var(--ink-3);
  border-bottom:2px solid var(--ink-3);
  transform:rotate(45deg);
  transition:transform .2s ease,border-color .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--accent);}
.faq-item summary:hover{color:var(--brand);}
.faq-no{color:var(--brand);font-variant-numeric:tabular-nums;font-weight:700;flex:0 0 auto;}
.faq-item[open] .faq-no{color:var(--accent);}
.faq-body{padding:0 40px 22px 0;font-size:15px;line-height:1.85;color:var(--ink-2);}
.faq-item[open] summary{border-left:3px solid var(--accent);padding-left:16px;margin-left:-16px;}

/* ---------- narrow cta ---------- */
.narrow-cta{
  background:linear-gradient(180deg,#EDF5F7 0%,#F5F9FB 100%);
  border-top:1px solid var(--line);
  padding:36px 0;
}
.narrow-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 26px;box-shadow:var(--sh-1);flex-wrap:wrap;
}
.narrow-inner p{margin:0;font-size:15px;color:var(--ink-2);}
.narrow-inner strong{color:var(--ink);}

/* ---------- footer ---------- */
.site-footer{
  background:#0D1B21;color:#A9BCC4;
  padding:64px 0 0;font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:40px;padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-ic{color:var(--cool);}
.footer-brand .brand-txt{color:#fff;}
.footer-brand .brand-txt em{color:var(--cool);}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9BCC4;max-width:340px;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.footer-tags span{
  font-size:12px;color:#C6D6DD;
  border:1px solid rgba(255,255,255,.14);
  padding:3px 10px;border-radius:var(--r-pill);
}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:#A9BCC4;}
.footer-col a:hover{color:var(--cool);}
.footer-note{font-size:13.5px;line-height:1.8;color:#8FA5AE;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#8FA5AE;
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  :root{--sec:72px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991px){
  :root{--sec:64px;}
  .container{padding:0 20px;}
  .nav-toggle{display:inline-flex;}
  .header-actions{gap:10px;}
  .search-box{display:none;}
  .main-nav{
    position:fixed;
    top:70px;left:0;right:0;bottom:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin:0;
    padding:18px 20px 32px;
    background:#fff;
    border-top:1px solid var(--line);
    overflow-y:auto;
    z-index:999;
  }
  .main-nav.open{display:flex;}
  .main-nav a{padding:14px 12px;font-size:16px;border-radius:10px;}
  .main-nav a.active{background:var(--tint);}
  .main-nav a.active::after{left:12px;right:auto;width:22px;bottom:8px;}
  .hero{padding:52px 0 48px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-figure{order:-1;}
  .hero-sub{max-width:none;}
  .term-grid{grid-template-columns:1fr;}
  .use-grid{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .chip-bar{top:70px;}
}
@media (max-width:767px){
  :root{--sec:48px;}
  .brand-txt{font-size:16px;}
  .header-inner{height:64px;}
  .nav-toggle{width:38px;height:38px;}
  .main-nav{top:64px;}
  .chip-bar{top:64px;}
  .btn{height:46px;padding:0 20px;font-size:15px;}
  .btn-row .btn{flex:1 1 100%;}
  .hero-float{left:auto;right:12px;bottom:-14px;padding:10px 14px;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .narrow-inner{padding:18px 20px;}
  .narrow-inner .btn{width:100%;}
  .term-item{padding:16px 16px;}
}
@media (max-width:520px){
  .hero-meta .badge-soft{font-size:11.5px;}
  .group-head .badge-soft{margin-left:0;}
  .section-head{margin-bottom:28px;}
}