/* roulang page: index */
:root{
  --brand-600:#137A99;
  --brand-700:#0F667F;
  --brand-900:#0B3A4A;
  --brand-100:#E4F1F5;
  --accent-500:#E0803C;
  --accent-600:#D0702C;
  --accent-100:#FBEEDF;
  --ink-900:#16303A;
  --ink-600:#4E6672;
  --ink-400:#8399A4;
  --line:#E2EAEE;
  --bg:#F6F9FA;
  --surface:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 2px 8px rgba(11,58,74,.06);
  --sh-2:0 10px 26px rgba(11,58,74,.12);
  --sh-3:0 6px 20px rgba(11,58,74,.10);
  --sec-y:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.8;color:var(--ink-600);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-0.01em;line-height:1.3;}
h1{font-size:clamp(28px,4.2vw,44px);line-height:1.25;}
h2{font-size:clamp(22px,3vw,32px);line-height:1.3;}
h3{font-size:20px;font-weight:600;line-height:1.4;}
p{margin:0;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
a:hover{color:var(--brand-700);}
img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
.container,.container-lg,.container-xl,.container-fluid{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
.row{--bs-gutter-x:24px;}
.num{font-variant-numeric:tabular-nums;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  padding:12px 0;
  transition:padding .28s ease,background-color .28s ease;
  background:transparent;
}
.nav-shell{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:76px;padding:0 18px;
  border-radius:16px;
  background:rgba(255,255,255,.62);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  backdrop-filter:blur(14px) saturate(1.4);
  border:1px solid rgba(226,234,238,.9);
  transition:height .28s ease,background-color .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.site-header.is-stuck{padding:8px 0;}
.site-header.is-stuck .nav-shell{
  height:64px;background:#FFFFFF;border-color:var(--line);box-shadow:var(--sh-3);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-900);}
.brand:hover{color:var(--brand-900);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand-600),#1C96B6);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(19,122,153,.28);
}
.brand-mark svg{width:22px;height:22px;display:block;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink-900);letter-spacing:0;}
.brand-text span{font-size:12px;font-weight:500;color:var(--ink-400);letter-spacing:.02em;}
.nav-menu{display:flex;align-items:center;flex:1 1 auto;justify-content:center;}
.nav-menu ul{display:flex;align-items:center;gap:2px;}
.nav-link-item{
  position:relative;display:block;padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--ink-600);white-space:nowrap;
}
.nav-link-item::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;width:20px;
  background:var(--brand-600);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;transition:transform .2s ease;
}
.nav-link-item:hover{color:var(--brand-600);background:rgba(228,241,245,.7);}
.nav-link-item:hover::after,.nav-link-item.is-active::after{transform:scaleX(1);}
.nav-link-item.is-active{color:var(--brand-600);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:.25s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 按钮 ============ */
.btn-cl,.btn-cl:focus{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn-cl:active{transform:translateY(0);}
.btn-primary-cl{background:var(--brand-600);color:#fff;}
.btn-primary-cl:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(19,122,153,.24);}
.btn-accent-cl{background:var(--accent-500);color:#fff;}
.btn-accent-cl:hover{background:#EA8C4C;color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(224,128,60,.28);}
.btn-ghost-cl{background:transparent;color:#fff;border-color:rgba(255,255,255,.62);}
.btn-ghost-cl:hover{background:rgba(255,255,255,.16);color:#fff;border-color:#fff;}
.btn-outline-cl{background:#fff;color:var(--brand-600);border-color:var(--line);}
.btn-outline-cl:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-600);}
.btn-block{width:100%;}
.btn-sm-cl{height:40px;padding:0 16px;font-size:14px;}

/* ============ 徽标 / 标签 ============ */
.badge-soft,.badge-accent,.badge-cat{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.01em;line-height:1;
}
.badge-soft{background:var(--brand-100);color:var(--brand-700);}
.badge-accent{background:var(--accent-100);color:#B4621F;}
.badge-cat{background:var(--brand-100);color:var(--brand-700);}
.badge-glass{background:rgba(255,255,255,.2);color:#fff;border:1px solid rgba(255,255,255,.38);}
.tag-line{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-400);}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;background:var(--brand-900);padding:150px 0 84px;min-height:560px;display:flex;align-items:center;}
.hero-bg{position:absolute;inset:0;z-index:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center;}
.hero-mask{
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(100deg,rgba(11,58,74,.82) 0%,rgba(11,58,74,.45) 55%,rgba(11,58,74,.15) 100%);
}
.hero .container{position:relative;z-index:2;}
.hero-copy{color:rgba(255,255,255,.82);}
.hero h1{color:#fff;margin-bottom:18px;max-width:14em;}
.hero-sub{font-size:17px;line-height:1.7;color:rgba(255,255,255,.86);max-width:30em;margin-bottom:28px;}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.trust-row{display:flex;flex-wrap:wrap;gap:8px 22px;}
.trust-row li{display:flex;align-items:center;gap:7px;font-size:13px;color:rgba(255,255,255,.7);}
.trust-row svg{width:15px;height:15px;flex:0 0 auto;}
.hero-card{
  background:rgba(255,255,255,.97);border-radius:16px;box-shadow:0 18px 40px rgba(5,32,42,.28);
  padding:20px;border:1px solid rgba(255,255,255,.6);
}
.hero-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);margin-bottom:16px;}
.hero-card h2{font-size:17px;font-weight:700;margin-bottom:6px;}
.hero-card p{font-size:13.5px;line-height:1.75;color:var(--ink-600);}
.hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px;padding-top:16px;border-top:1px solid var(--line);}
.hero-metrics div{text-align:center;}
.hero-metrics strong{display:block;font-size:20px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;}
.hero-metrics span{font-size:12px;color:var(--ink-400);}

/* ============ 通用板块 ============ */
.section{padding:var(--sec-y) 0;}
.section-alt{background:#fff;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;}
.sec-head .sec-note{font-size:14px;color:var(--ink-400);white-space:nowrap;}
.sec-head p{font-size:14px;color:var(--ink-400);}
.link-more{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.link-more:hover{gap:9px;}

/* ============ 阶梯 ============ */
.stair-row{display:grid;grid-template-columns:repeat(4,1fr);align-items:start;gap:20px;}
.stair-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:24px;display:flex;flex-direction:column;gap:10px;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.stair-card:nth-child(1){min-height:196px;}
.stair-card:nth-child(2){min-height:208px;}
.stair-card:nth-child(3){min-height:220px;}
.stair-card:nth-child(4){min-height:232px;}
.stair-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#cfe3ea;}
.stair-card:not(:last-child)::after{
  content:"";position:absolute;top:44px;right:-14px;width:9px;height:9px;
  border-top:2px solid var(--brand-600);border-right:2px solid var(--brand-600);
  transform:rotate(45deg);opacity:.45;
}
.stair-num{
  width:32px;height:32px;border-radius:999px;flex:0 0 auto;
  background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.stair-card h3{font-size:17px;}
.stair-card p{font-size:14px;line-height:1.7;color:var(--ink-600);}
.stair-link{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:5px;}
.stair-link:hover{gap:8px;}

/* ============ 对比表 ============ */
.compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--r-card);border:1px solid var(--line);background:#fff;box-shadow:var(--sh-1);}
.compare-scroll::-webkit-scrollbar{height:8px;}
.compare-scroll::-webkit-scrollbar-thumb{background:#d6e4ea;border-radius:8px;}
.compare-table{width:100%;min-width:820px;border-collapse:collapse;}
.compare-table th,.compare-table td{padding:14px 18px;text-align:center;font-size:14px;border-bottom:1px solid var(--line);vertical-align:middle;}
.compare-table thead th{
  position:sticky;top:0;z-index:2;background:#fff;
  padding:20px 18px 16px;border-bottom:1px solid var(--line);
}
.compare-table thead th.dim-col{background:#fff;text-align:left;color:var(--ink-400);font-weight:600;font-size:13px;}
.compare-table th.dim-col,.compare-table td.dim-col{text-align:left;color:var(--ink-400);font-size:13.5px;font-weight:500;}
.compare-table td.dim-col{color:var(--ink-600);}
.compare-table tbody tr:last-child td{border-bottom:none;}
.plan-name{display:block;font-size:17px;font-weight:700;color:var(--ink-900);margin-bottom:8px;}
.plan-price{display:flex;align-items:baseline;justify-content:center;gap:4px;}
.plan-price strong{font-size:32px;font-weight:700;color:var(--brand-600);line-height:1;font-variant-numeric:tabular-nums;}
.plan-price em{font-style:normal;font-size:13px;color:var(--ink-400);}
.compare-table th.is-featured,.compare-table td.is-featured{background:var(--brand-100);border-left:1px solid rgba(19,122,153,.3);border-right:1px solid rgba(19,122,153,.3);}
.compare-table th.is-featured{box-shadow:inset 0 3px 0 var(--brand-600);}
.compare-table td.is-featured .plan-price strong{color:var(--brand-700);}
.tick{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:999px;background:var(--brand-100);color:var(--brand-600);font-size:12px;font-weight:700;}
.tick.off{background:#F1F5F7;color:var(--ink-400);}
.plan-btn{padding:6px 0 4px;}

/* ============ 限时入口 ============ */
.limit-box{
  background:var(--brand-900);border-radius:20px;padding:40px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:0 18px 40px rgba(11,58,74,.2);
}
.limit-box h2{color:#fff;margin-bottom:10px;font-size:clamp(20px,2.6vw,28px);}
.limit-box p{color:rgba(255,255,255,.78);font-size:15px;max-width:34em;}
.limit-right{display:flex;align-items:center;gap:24px;flex-wrap:wrap;}
.countdown{display:flex;align-items:center;gap:8px;}
.cd-cell{
  width:48px;height:56px;border-radius:10px;background:rgba(255,255,255,.12);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
}
.cd-cell strong{font-size:22px;font-weight:600;color:#fff;line-height:1;font-variant-numeric:tabular-nums;}
.cd-cell span{font-size:12px;color:rgba(255,255,255,.7);}
.cd-sep{color:rgba(255,255,255,.5);font-size:20px;font-weight:600;}

/* ============ 资讯列表 ============ */
.news-lead{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);height:100%;color:inherit;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.news-lead:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#cfe3ea;color:inherit;}
.news-lead:hover .news-lead-title{color:var(--brand-600);}
.news-lead:hover .news-thumb img{transform:scale(1.03);}
.news-thumb{overflow:hidden;}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .25s ease;}
.news-lead-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.news-lead-title{font-size:20px;font-weight:600;color:var(--ink-900);line-height:1.4;transition:color .25s ease;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-lead-sum{font-size:14.5px;color:var(--ink-600);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-lead-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-400);padding-top:12px;border-top:1px solid var(--line);}
.news-mini{
  display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:14px;box-shadow:var(--sh-1);color:inherit;flex:1 1 auto;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.news-mini:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#cfe3ea;color:inherit;}
.news-mini:hover .news-mini-title{color:var(--brand-600);}
.news-mini:hover .news-mini-thumb img{transform:scale(1.04);}
.news-mini-thumb{width:96px;height:72px;border-radius:10px;overflow:hidden;flex:0 0 auto;}
.news-mini-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease;}
.news-mini-body{display:flex;flex-direction:column;gap:6px;min-width:0;}
.news-mini-title{font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .25s ease;}
.news-mini-date{font-size:12.5px;color:var(--ink-400);}
.news-side{display:flex;flex-direction:column;gap:20px;height:100%;}
.news-empty{
  border:1px dashed #bcd4de;background:#fff;border-radius:var(--r-card);min-height:260px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:32px;text-align:center;
}
.news-empty svg{width:38px;height:38px;color:var(--brand-600);opacity:.7;}
.news-empty p{font-size:14px;color:var(--ink-400);}

/* ============ 表单 ============ */
.form-card{background:#fff;border-radius:var(--r-card);box-shadow:var(--sh-2);padding:28px;border:1px solid var(--line);}
.form-label-cl{display:block;font-size:13.5px;font-weight:600;color:var(--ink-900);margin-bottom:7px;}
.form-control,.form-select{
  height:46px;border-radius:10px;border:1px solid var(--line);background:#fff;
  font-size:15px;color:var(--ink-900);padding:0 14px;box-shadow:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
textarea.form-control{height:auto;padding:12px 14px;line-height:1.7;resize:vertical;}
.form-control::placeholder{color:#A9BCC5;}
.form-control:focus,.form-select:focus{
  border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(19,122,153,.14);background:#fff;color:var(--ink-900);
}
.form-select{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%234E6672' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right 14px center;background-size:14px;}
.form-note{font-size:12px;color:var(--ink-400);margin-top:12px;line-height:1.7;}
.contact-points li{display:flex;gap:12px;margin-bottom:18px;}
.contact-points .ico{
  width:34px;height:34px;border-radius:999px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;font-size:13px;font-weight:700;
}
.contact-points h4{font-size:15.5px;font-weight:600;color:var(--ink-900);margin-bottom:2px;}
.contact-points p{font-size:14px;color:var(--ink-600);line-height:1.7;}

/* ============ FAQ ============ */
.faq-wrap{max-width:840px;margin:0 auto;}
.faq-list{display:flex;flex-direction:column;gap:10px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--sh-1);overflow:hidden;}
.faq-q{
  display:flex;align-items:center;gap:14px;width:100%;padding:18px 20px;
  background:transparent;border:none;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-q .faq-idx{
  width:24px;height:24px;border-radius:999px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex:0 0 auto;
}
.faq-q .faq-chev{margin-left:auto;width:16px;height:16px;flex:0 0 auto;color:var(--ink-400);transition:transform .25s ease,color .25s ease;}
.faq-item.is-open .faq-chev{transform:rotate(180deg);color:var(--brand-600);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-a-inner{padding:0 20px 20px 58px;font-size:15px;line-height:1.8;color:var(--ink-600);border-top:1px solid var(--line);padding-top:16px;margin-top:0;}
.faq-item.is-open{border-color:#cfe3ea;}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:linear-gradient(140deg,#1C96B6,#137A99);}
.footer-brand strong{color:#fff;font-size:16px;}
.footer-brand span{display:block;color:rgba(255,255,255,.5);font-size:12px;}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);}
.footer-contact{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.footer-contact li{font-size:13.5px;color:rgba(255,255,255,.62);}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;}
.footer-col a{display:inline-block;line-height:36px;font-size:14px;color:rgba(255,255,255,.72);transition:color .2s ease,transform .2s ease;}
.footer-col a:hover{color:#8FD3E6;transform:translateX(2px);}
.footer-sub p{margin-bottom:16px;font-size:13.5px;}
.footer-sub .form-control{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:#fff;height:44px;}
.footer-sub .form-control::placeholder{color:rgba(255,255,255,.42);}
.footer-sub .form-control:focus{background:rgba(255,255,255,.12);border-color:#8FD3E6;box-shadow:0 0 0 3px rgba(143,211,230,.16);color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p,.footer-bottom a{font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom a:hover{color:#8FD3E6;}
.footer-legal{display:flex;gap:18px;flex-wrap:wrap;}
.footer-acc-head{display:none;}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{scroll-behavior:auto !important;}
}

/* ============ 断点 ============ */
@media (min-width:1200px){
  .container,.container-lg,.container-xl{max-width:1200px;}
}
@media (max-width:1199px){
  :root{--sec-y:76px;}
  .hero{padding-top:140px;}
}
@media (max-width:991px){
  :root{--sec-y:64px;}
  .nav-menu{
    display:none;position:absolute;top:calc(100% + 12px);left:16px;right:16px;
    background:#fff;border-radius:16px;box-shadow:var(--sh-2);border:1px solid var(--line);
    padding:12px;flex-direction:column;align-items:stretch;gap:0;
  }
  .nav-menu.is-open{display:flex;}
  .nav-menu ul{flex-direction:column;gap:0;width:100%;}
  .nav-menu li + li{border-top:1px solid var(--line);}
  .nav-link-item{height:48px;display:flex;align-items:center;padding:0 12px;border-radius:8px;font-size:15px;}
  .nav-link-item::after{display:none;}
  .nav-link-item.is-active{background:var(--brand-100);}
  .nav-menu .drawer-cta{margin-top:12px;padding:0 4px 4px;}
  .nav-menu .drawer-cta .btn-cl{width:100%;}
  .nav-toggle{display:flex;}
  .nav-actions .btn-cl{display:none;}
  .nav-shell{position:relative;}
  .hero{padding:132px 0 64px;min-height:0;}
  .hero h1{max-width:100%;}
  .hero-card{margin-top:32px;}
  .stair-row{grid-template-columns:repeat(2,1fr);gap:16px;}
  .stair-card{min-height:0 !important;}
  .stair-card::after{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .news-side{height:auto;margin-top:20px;}
  .limit-box{padding:30px;}
}
@media (max-width:767px){
  :root{--sec-y:48px;}
  body{font-size:15px;}
  h1{font-size:26px;}
  h2{font-size:21px;}
  .container,.container-lg,.container-xl{padding-left:16px;padding-right:16px;}
  .hero{padding:118px 0 52px;}
  .hero-sub{font-size:15.5px;}
  .hero-btns .btn-cl{flex:1 1 auto;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .sec-head .sec-note{white-space:normal;}
  .limit-right{width:100%;justify-content:space-between;gap:16px;}
  .limit-box{padding:26px 20px;border-radius:16px;}
  .cd-cell{width:42px;height:50px;}
  .cd-cell strong{font-size:19px;}
  .form-card{padding:20px;}
  .news-lead-body{padding:18px 18px 20px;}
  .news-mini-thumb{width:84px;height:64px;}
  .faq-a-inner{padding-left:20px;}
  .site-footer{padding-top:48px;}
  .footer-grid{
    grid-template-columns:1fr;gap:0;padding-bottom:24px;
  }
  .footer-col{border-bottom:1px solid rgba(255,255,255,.12);}
  .footer-col .footer-acc-head{
    display:flex;align-items:center;justify-content:space-between;width:100%;
    padding:16px 0;background:transparent;border:none;cursor:pointer;
    font-size:14px;font-weight:600;color:#fff;
  }
  .footer-col .footer-acc-head svg{width:14px;height:14px;transition:transform .25s ease;color:rgba(255,255,255,.6);}
  .footer-col.is-open .footer-acc-head svg{transform:rotate(180deg);}
  .footer-col h4{display:none;}
  .footer-panel{max-height:0;overflow:hidden;transition:max-height .3s ease;}
  .footer-col.is-open .footer-panel{max-height:520px;}
  .footer-panel ul{padding-bottom:12px;}
  .footer-panel p{padding-bottom:14px;}
  .footer-panel .footer-sub{padding-bottom:20px;}
  .footer-panel .footer-contact{padding-bottom:16px;}
  .footer-brand{margin-bottom:12px;}
  .footer-brand-wrap{padding:16px 0 20px;border-bottom:1px solid rgba(255,255,255,.12);}
}
@media (max-width:575px){
  .stair-row{grid-template-columns:1fr;}
  .hero-btns{flex-direction:column;align-items:stretch;}
  .hero-btns .btn-cl{width:100%;}
  .btn-cl{width:100%;}
  .hero-btns{width:100%;}
  .limit-right .btn-cl{width:100%;}
  .brand-text span{display:none;}
  .countdown{gap:5px;}
  .cd-cell{width:38px;height:46px;border-radius:8px;}
  .cd-cell strong{font-size:17px;}
  .cd-cell span{font-size:11px;}
  .footer-legal{gap:12px;}
}

/* roulang page: article */
:root{
  --brand-600:#137A99;
  --brand-700:#0F6982;
  --brand-900:#0B3A4A;
  --brand-100:#E4F1F5;
  --accent-500:#E0803C;
  --accent-600:#D0722F;
  --accent-100:#FBEEDF;
  --ink-900:#16303A;
  --ink-600:#4E6672;
  --ink-400:#8399A4;
  --line:#E2EAEE;
  --bg:#F6F9FA;
  --surface:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-sm:12px;
  --shadow-1:0 2px 8px rgba(11,58,74,.06);
  --shadow-2:0 10px 26px rgba(11,58,74,.12);
  --shadow-3:0 6px 20px rgba(11,58,74,.10);
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-600);
  background:var(--bg);
  font-feature-settings:"tnum";
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .22s ease,background-color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-0.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.row{--bs-gutter-x:24px;}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 导航 ============ */
.site-header{
  position:absolute;
  top:0;left:0;right:0;
  z-index:1030;
  padding:14px 0;
  transition:padding .28s ease,background-color .28s ease,box-shadow .28s ease;
  background:transparent;
}
.site-header .nav-shell{
  background:rgba(255,255,255,.62);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  backdrop-filter:blur(14px) saturate(1.4);
  border:1px solid rgba(226,234,238,.9);
  border-radius:16px;
  box-shadow:var(--shadow-1);
  padding:10px 18px;
  display:flex;
  align-items:center;
  gap:26px;
  transition:border-radius .28s ease,padding .28s ease,background-color .28s ease;
}
.site-header.is-stuck{
  position:fixed;
  background:rgba(255,255,255,.97);
  box-shadow:var(--shadow-3);
  padding:8px 0;
}
.site-header.is-stuck .nav-shell{
  background:transparent;
  border-color:transparent;
  box-shadow:none;
  -webkit-backdrop-filter:none;
  backdrop-filter:none;
  padding:4px 0;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,#1A8CAD 0%,var(--brand-600) 100%);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(19,122,153,.26);
  flex-shrink:0;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:0;}
.brand-text span{font-size:12px;color:var(--ink-400);letter-spacing:.02em;}
.nav-menu{display:flex;align-items:center;gap:10px;margin-left:auto;}
.nav-menu ul{display:flex;align-items:center;gap:4px;}
.nav-link-item{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-600);
}
.nav-link-item::after{
  content:"";
  position:absolute;
  left:14px;bottom:4px;
  width:0;height:2px;
  border-radius:2px;
  background:var(--brand-600);
  transition:width .2s ease;
}
.nav-link-item:hover{color:var(--brand-600);}
.nav-link-item:hover::after{width:20px;}
.nav-link-item.is-active{color:var(--brand-600);font-weight:600;}
.nav-link-item.is-active::after{width:20px;}
.drawer-cta{display:none;}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid var(--line);
  background:#fff;
  padding:0 10px;
  flex-direction:column;
  justify-content:center;
  gap:4px;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--ink-900);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============ 按钮 ============ */
.btn-cl{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:all .22s ease;
}
.btn-primary-cl{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px rgba(19,122,153,.22);}
.btn-primary-cl:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);}
.btn-primary-cl:active{transform:translateY(0);}
.btn-accent-cl{background:var(--accent-500);color:#fff;box-shadow:0 6px 16px rgba(224,128,60,.24);}
.btn-accent-cl:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);}
.btn-accent-cl:active{transform:translateY(0);}
.btn-outline-cl{background:#fff;color:var(--brand-600);border-color:var(--line);}
.btn-outline-cl:hover{background:var(--brand-100);border-color:var(--brand-600);color:var(--brand-600);}
.btn-ghost-cl{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);}
.btn-ghost-cl:hover{background:rgba(255,255,255,.24);color:#fff;}
.btn-sm-cl{height:40px;padding:0 18px;font-size:14px;}

/* ============ 面包屑与文章头部 ============ */
.article-hero{
  background:linear-gradient(180deg,var(--brand-100) 0%,#EFF6F8 56%,var(--bg) 100%);
  padding-bottom:40px;
}
.breadcrumb-cl ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  min-height:44px;
  font-size:13px;
  color:var(--ink-400);
  padding-top:104px;
}
.breadcrumb-cl a{color:var(--ink-400);}
.breadcrumb-cl a:hover{color:var(--brand-600);}
.breadcrumb-cl .sep{opacity:.6;}
.breadcrumb-cl .current{
  color:var(--brand-600);
  font-weight:600;
  max-width:min(560px,60vw);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.article-hero h1{
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.32;
  max-width:940px;
  margin-bottom:18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--ink-400);}
.article-meta .dot{color:#C7D6DC;}
.badge-cat{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-600);
  font-size:12px;
  font-weight:600;
}
.badge-soft{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--accent-100);
  color:var(--accent-600);
  font-size:12px;
  font-weight:600;
}

/* ============ 正文布局 ============ */
.article-layout{padding:0 0 72px;}
.article-cover{
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-2);
  margin-top:28px;
  background:#fff;
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.article-main{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:34px 32px 40px;
  margin-top:32px;
}
.article-body{
  max-width:760px;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-600);
  overflow-wrap:break-word;
}
.article-body p{margin:0 0 1.15em;}
.article-body h2{
  position:relative;
  font-size:22px;
  font-weight:600;
  line-height:1.4;
  color:var(--ink-900);
  margin:40px 0 16px;
  padding-left:16px;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.2em;
  width:4px;height:1em;
  border-radius:2px;
  background:var(--brand-600);
}
.article-body h3{font-size:18px;font-weight:600;color:var(--ink-900);margin:28px 0 12px;}
.article-body h4{font-size:16px;font-weight:600;color:var(--ink-900);margin:22px 0 10px;}
.article-body ul{margin:0 0 1.15em;}
.article-body ul li{position:relative;padding-left:18px;margin-bottom:.5em;line-height:1.9;}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.75em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--brand-600);
}
.article-body ul ul{margin:.4em 0 .2em 20px;}
.article-body ul ul li::before{background:var(--brand-100);border:1px solid var(--brand-600);}
.article-body ol{margin:0 0 1.15em;counter-reset:ord;}
.article-body ol > li{
  counter-increment:ord;
  position:relative;
  padding-left:36px;
  margin-bottom:.6em;
  line-height:1.9;
}
.article-body ol > li::before{
  content:counter(ord);
  position:absolute;
  left:0;top:.42em;
  width:24px;height:24px;
  border-radius:50%;
  background:var(--brand-100);
  color:var(--brand-600);
  font-size:13px;
  font-weight:600;
  display:flex;
  align-items:center;
  justify-content:center;
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:24px 0;
  padding:16px 20px;
  background:var(--brand-100);
  border-left:3px solid var(--brand-600);
  border-radius:0 10px 10px 0;
  font-size:15px;
  color:var(--ink-600);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-sm);margin:24px auto;}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{text-decoration-thickness:2px;}
.article-body figure{margin:24px 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--ink-400);margin-top:8px;}
.article-body table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  margin:24px 0;
  font-size:15px;
}
.article-body thead th{background:var(--brand-100);color:var(--ink-900);font-weight:600;text-align:left;}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body strong{color:var(--ink-900);font-weight:600;}
.article-empty{
  padding:56px 24px;
  text-align:center;
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  background:var(--bg);
}
.article-empty .icon{
  width:56px;height:56px;
  border-radius:50%;
  background:var(--brand-100);
  color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 18px;
}
.article-empty h2{font-size:20px;margin-bottom:10px;}
.article-empty p{font-size:14px;color:var(--ink-400);margin-bottom:22px;}

/* ============ 侧栏 ============ */
.side-panel{position:sticky;top:96px;}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:24px;
  margin-bottom:20px;
  transition:box-shadow .25s ease;
}
.side-card:hover{box-shadow:var(--shadow-2);}
.side-title{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:16px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:8px;
}
.side-title::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--brand-600);}
.side-list li + li{border-top:1px solid var(--line);}
.side-list a{
  position:relative;
  display:block;
  padding:12px 10px 12px 14px;
  font-size:14px;
  line-height:1.6;
  color:var(--ink-600);
}
.side-list a::before{
  content:"";
  position:absolute;
  left:0;top:12px;bottom:12px;
  width:3px;
  border-radius:2px;
  background:transparent;
  transition:background-color .22s ease;
}
.side-list a:hover{background:var(--bg);color:var(--brand-600);}
.side-list a:hover::before{background:var(--brand-600);}
.side-list .meta{display:block;font-size:12px;color:var(--ink-400);margin-top:4px;}
.side-entry{text-align:center;}
.side-entry .icon{
  width:52px;height:52px;
  border-radius:50%;
  background:var(--brand-100);
  color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 14px;
}
.side-entry p{font-size:14px;color:var(--ink-600);margin-bottom:18px;}

/* ============ 上下篇 / 相关推荐 ============ */
.post-nav{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
  margin-top:8px;
}
.post-nav-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:22px 24px;
  transition:all .25s ease;
}
.post-nav-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.post-nav-item .label{display:block;font-size:12px;font-weight:600;color:var(--brand-600);margin-bottom:8px;}
.post-nav-item strong{display:block;font-size:16px;color:var(--ink-900);line-height:1.5;font-weight:600;}
.post-nav-item:hover strong{color:var(--brand-600);}
.post-nav-item.is-next{text-align:right;}
.divider-line{height:1px;background:var(--line);margin:48px 0 32px;}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.related-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:all .25s ease;
}
.related-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.related-card .thumb{overflow:hidden;aspect-ratio:16/9;background:var(--brand-100);}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.related-card:hover .thumb img{transform:scale(1.03);}
.related-card .body{padding:18px 20px 22px;}
.related-card .body h3{font-size:16px;line-height:1.5;margin:10px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.related-card:hover .body h3{color:var(--brand-600);}
.related-card .body p{font-size:13px;color:var(--ink-400);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ============ CTA ============ */
.cta-band{padding:0 0 80px;}
.cta-box{
  background:var(--brand-900);
  border-radius:20px;
  padding:44px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  position:relative;
  overflow:hidden;
}
.cta-box::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:240px;height:240px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(19,122,153,.55) 0%,rgba(19,122,153,0) 70%);
}
.cta-box h2{color:#fff;font-size:clamp(20px,2.6vw,28px);margin-bottom:10px;}
.cta-box p{color:rgba(255,255,255,.78);font-size:15px;max-width:620px;}
.cta-actions{display:flex;gap:14px;flex-shrink:0;position:relative;z-index:2;}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-900);padding:64px 0 0;color:rgba(255,255,255,.72);}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px;}
.footer-acc-head{display:none;}
.footer-brand{margin-bottom:18px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text span{color:rgba(255,255,255,.62);}
.footer-panel p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin-bottom:16px;}
.footer-contact li{font-size:13px;color:rgba(255,255,255,.5);line-height:2;}
.footer-col ul li{line-height:36px;}
.footer-col ul a{display:inline-block;font-size:14px;color:rgba(255,255,255,.72);}
.footer-col ul a:hover{color:#A9DCEA;transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom ul{display:flex;flex-wrap:wrap;gap:20px;}
.footer-bottom ul a{font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom ul a:hover{color:#A9DCEA;}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .related-grid{grid-template-columns:repeat(3,1fr);gap:18px;}
}
@media (max-width:991.98px){
  .site-header{padding:10px 0;}
  .site-header .nav-shell{padding:8px 14px;gap:12px;}
  .nav-toggle{display:flex;}
  .nav-menu{
    position:fixed;
    top:12px;left:16px;right:16px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:#fff;
    border-radius:16px;
    box-shadow:var(--shadow-2);
    padding:14px;
    z-index:1060;
    margin-left:0;
  }
  .nav-menu.is-open{display:flex;}
  .nav-menu ul{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu li + li{border-top:1px solid var(--line);}
  .nav-link-item{display:flex;align-items:center;height:48px;padding:0 6px;font-size:15px;border-radius:8px;}
  .nav-link-item::after{display:none;}
  .nav-link-item.is-active{background:var(--brand-100);padding-left:12px;}
  .drawer-cta{display:block;margin-top:14px;}
  .drawer-cta .btn-cl{width:100%;}
  .nav-actions .btn-cl{display:none;}
  .article-main{padding:26px 22px 32px;}
  .side-panel{position:static;margin-top:32px;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-box{flex-direction:column;align-items:flex-start;padding:36px 28px;}
  .cta-actions{width:100%;flex-wrap:wrap;}
}
@media (max-width:767.98px){
  .container{padding-left:16px;padding-right:16px;}
  .article-hero h1{font-size:clamp(22px,5.6vw,30px);}
  .breadcrumb-cl ol{padding-top:92px;padding-bottom:6px;}
  .breadcrumb-cl .current{max-width:100%;white-space:normal;}
  .article-main{padding:22px 18px 28px;}
  .article-layout{padding-bottom:52px;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav-item.is-next{text-align:left;}
  .related-grid{grid-template-columns:1fr;}
  .cta-band{padding-bottom:56px;}
  .footer-grid{grid-template-columns:1fr;gap:0;padding-bottom:28px;}
  .footer-col{border-bottom:1px solid rgba(255,255,255,.12);}
  .footer-col h4{display:none;}
  .footer-acc-head{
    display:flex;
    align-items:center;
    justify-content:space-between;
    width:100%;
    padding:16px 0;
    color:#fff;
    font-size:14px;
    font-weight:600;
  }
  .footer-acc-head svg{width:16px;height:16px;transition:transform .25s ease;}
  .footer-col.is-open .footer-acc-head svg{transform:rotate(180deg);}
  .footer-col .footer-panel{display:none;padding-bottom:18px;}
  .footer-col.is-open .footer-panel{display:block;}
  .footer-brand-wrap .footer-panel{display:block;}
  .footer-brand-wrap{border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:20px;margin-bottom:4px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:575.98px){
  .btn-cl{width:100%;}
  .cta-actions{flex-direction:column;}
  .related-card .body{padding:16px;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:17px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
/* ===== 变量层 ===== */
:root{
  --brand-600:#137A99;
  --brand-900:#0B3A4A;
  --brand-100:#E4F1F5;
  --accent-500:#E0803C;
  --accent-100:#FBEEDF;
  --ink-900:#16303A;
  --ink-600:#4E6672;
  --ink-400:#8399A4;
  --line:#E2EAEE;
  --bg:#F6F9FA;
  --surface:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 2px 8px rgba(11,58,74,.06);
  --shadow-2:0 10px 26px rgba(11,58,74,.12);
  --shadow-3:0 6px 20px rgba(11,58,74,.10);
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ===== reset / 基础层 ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-900);}
h1,h2,h3,h4{color:var(--ink-900);letter-spacing:-.01em;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:var(--brand-100);color:var(--brand-900);}

.container{max-width:1200px;padding-left:24px;padding-right:24px;}
.num{font-variant-numeric:tabular-nums;}

/* ===== 通用按钮 ===== */
.btn-cl{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;font-size:15px;font-weight:600;
  border-radius:var(--radius-btn);border:1px solid transparent;
  cursor:pointer;transition:all .25s ease;text-align:center;line-height:1;
}
.btn-primary-cl{background:var(--brand-600);color:#fff;}
.btn-primary-cl:hover{background:#0F6B86;color:#fff;transform:translateY(-1px);}
.btn-accent-cl{background:var(--accent-500);color:#fff;}
.btn-accent-cl:hover{background:#E88F52;color:#fff;transform:translateY(-1px);}
.btn-ghost-cl{background:#fff;color:var(--brand-600);border-color:var(--line);}
.btn-ghost-cl:hover{background:var(--brand-100);border-color:var(--brand-600);color:var(--brand-600);}
.btn-line-cl{background:#fff;color:var(--brand-600);border-color:rgba(19,122,153,.45);}
.btn-line-cl:hover{background:var(--brand-100);border-color:var(--brand-600);color:var(--brand-900);}
.btn-cl:active{transform:translateY(0);}
.btn-cl:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
  outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;
}
.btn-sm-cl{height:40px;padding:0 18px;font-size:14px;}

/* ===== 徽标 / 标签 ===== */
.badge-cl{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;font-size:12px;font-weight:600;line-height:1;
}
.badge-brand{background:var(--brand-100);color:var(--brand-600);}
.badge-accent{background:var(--accent-100);color:#B4652A;}

/* ===== 导航 ===== */
.site-header{
  position:absolute;top:0;left:0;right:0;z-index:1030;
  background:rgba(255,255,255,.62);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid rgba(226,234,238,.9);
  transition:background .28s ease,box-shadow .28s ease,height .28s ease;
}
.site-header.is-stuck{
  position:fixed;background:#fff;box-shadow:var(--shadow-3);
  border-bottom-color:var(--line);
}
.nav-shell{display:flex;align-items:center;gap:28px;height:76px;transition:height .28s ease;}
.site-header.is-stuck .nav-shell{height:64px;}

.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;flex-shrink:0;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-900));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(11,58,74,.22);
}
.brand-mark svg{width:21px;height:21px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:700;color:var(--brand-900);letter-spacing:.02em;}
.brand-text span{font-size:11px;color:var(--ink-400);letter-spacing:.06em;}

.nav-menu{display:flex;align-items:center;margin-left:auto;}
.nav-menu ul{display:flex;align-items:center;gap:4px;}
.nav-link-item{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 13px;font-size:15px;font-weight:500;color:var(--ink-600);
  border-radius:8px;
}
.nav-link-item::after{
  content:"";position:absolute;left:13px;bottom:2px;width:0;height:2px;
  background:var(--brand-600);border-radius:2px;transition:width .2s ease;
}
.nav-link-item:hover{color:var(--brand-600);}
.nav-link-item:hover::after{width:20px;}
.nav-link-item.is-active{color:var(--brand-600);font-weight:600;}
.nav-link-item.is-active::after{width:20px;}

.nav-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}
.drawer-cta{display:none;}

.nav-toggle{
  display:none;width:42px;height:42px;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-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);border-radius:2px;transition:all .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ===== 分类页头部条 ===== */
.page-strip{
  position:relative;
  min-height:260px;
  background:linear-gradient(180deg,var(--brand-100) 0%,var(--bg) 100%);
  padding:132px 0 44px;
  overflow:hidden;
}
.page-strip::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center right;
  opacity:.10;pointer-events:none;
}
.page-strip .container{position:relative;z-index:1;}
.breadcrumb-cl{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:14px;}
.breadcrumb-cl a{color:var(--ink-400);}
.breadcrumb-cl a:hover{color:var(--brand-600);}
.breadcrumb-cl .sep{color:var(--ink-400);}
.breadcrumb-cl .current{color:var(--brand-600);font-weight:600;}
.page-strip h1{font-size:clamp(26px,3.6vw,40px);font-weight:700;line-height:1.25;}
.strip-lead{margin-top:14px;max-width:760px;font-size:14px;line-height:1.75;color:var(--ink-600);}

/* ===== 主体 ===== */
main{display:block;}
.section{padding:64px 0;}
.section-tight{padding:48px 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:32px;
}
.section-head h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.3;}
.section-head .head-note{font-size:14px;color:var(--ink-400);line-height:1.6;}
.section-head .head-note a{font-weight:600;}

/* ===== 锚点索引 ===== */
.faq-index{position:sticky;top:96px;}
.faq-index .index-title{
  font-size:13px;font-weight:600;color:var(--ink-400);
  letter-spacing:.08em;margin-bottom:12px;
}
.faq-index ul{display:flex;flex-direction:column;gap:2px;}
.faq-index a{
  display:block;padding:10px 12px;font-size:14px;color:var(--ink-600);
  border-left:3px solid transparent;border-radius:0 8px 8px 0;
  transition:all .22s ease;
}
.faq-index a:hover{background:var(--bg);color:var(--brand-600);}
.faq-index a.is-current{
  border-left-color:var(--brand-600);background:var(--brand-100);
  color:var(--brand-600);font-weight:600;
}
.faq-index .index-foot{
  margin-top:18px;padding:16px;border:1px solid var(--line);border-radius:var(--radius-card);
  background:#fff;box-shadow:var(--shadow-1);font-size:13px;line-height:1.7;color:var(--ink-600);
}
.faq-index .index-foot a{display:inline-block;margin-top:8px;font-weight:600;font-size:13px;}

/* ===== 问答分组 ===== */
.qa-group{scroll-margin-top:96px;margin-bottom:48px;}
.qa-group:last-child{margin-bottom:0;}
.qa-group-head{display:flex;align-items:center;gap:12px;margin-bottom:20px;}
.group-no{
  width:34px;height:34px;border-radius:50%;flex-shrink:0;
  background:var(--brand-100);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;
}
.qa-group-head h2{font-size:21px;font-weight:600;line-height:1.4;}
.qa-group-head .group-desc{font-size:13px;color:var(--ink-400);margin-left:auto;}

.qa-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 24px;box-shadow:var(--shadow-1);margin-bottom:14px;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.qa-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#D3E3E9;}
.qa-item h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:10px;color:var(--ink-900);}
.qa-item p{font-size:15px;line-height:1.85;color:var(--ink-600);}
.qa-item p + p{margin-top:10px;}
.qa-tip{
  margin-top:14px;padding:12px 16px;border-radius:10px;
  background:var(--brand-100);font-size:14px;line-height:1.7;color:var(--brand-900);
  display:flex;gap:10px;align-items:flex-start;
}
.qa-tip svg{width:17px;height:17px;flex-shrink:0;margin-top:3px;}

.qa-figure{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;margin:6px 0 18px;
}
.qa-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;}
.qa-figure figcaption{padding:12px 18px;font-size:13px;color:var(--ink-400);border-top:1px solid var(--line);}

/* ===== 自检清单 ===== */
.check-section{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.check-card{
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--bg);
  padding:22px;transition:all .25s ease;
}
.check-card:hover{background:#fff;box-shadow:var(--shadow-2);transform:translateY(-2px);}
.check-icon{
  width:38px;height:38px;border-radius:50%;background:var(--brand-600);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.check-icon svg{width:18px;height:18px;}
.check-card h3{font-size:16px;font-weight:600;margin-bottom:8px;}
.check-card p{font-size:14px;line-height:1.7;color:var(--ink-600);}

/* ===== CTA ===== */
.cta-block{
  background:var(--brand-900);border-radius:20px;padding:44px;
  display:grid;grid-template-columns:1.4fr .9fr;gap:32px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-block::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;
  border-radius:50%;background:rgba(19,122,153,.28);pointer-events:none;
}
.cta-block h2{color:#fff;font-size:clamp(21px,2.6vw,28px);font-weight:700;line-height:1.35;position:relative;z-index:1;}
.cta-block p{color:rgba(255,255,255,.78);font-size:15px;line-height:1.8;margin-top:12px;position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;position:relative;z-index:1;}
.cta-actions .btn-ghost-cl{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.cta-actions .btn-ghost-cl:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}

/* ===== 页脚 ===== */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text span{color:rgba(255,255,255,.55);}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul li a{
  display:inline-block;line-height:36px;font-size:14px;color:rgba(255,255,255,.72);
  transition:all .2s ease;
}
.footer-col ul li a:hover{color:#9FD6E4;transform:translateX(2px);}
.footer-panel p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);}
.footer-contact{margin-top:14px;}
.footer-contact li{font-size:13px;line-height:1.9;color:rgba(255,255,255,.5);}
.footer-acc-head{display:none;}
.footer-sub{display:flex;gap:10px;margin-top:16px;}
.footer-sub input{
  flex:1;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);color:#fff;padding:0 14px;font-size:14px;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45);}
.footer-sub input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(19,122,153,.28);}
.footer-sub .btn-cl{height:44px;padding:0 18px;font-size:14px;}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom ul{display:flex;gap:20px;flex-wrap:wrap;}
.footer-bottom ul a{font-size:13px;color:rgba(255,255,255,.6);}
.footer-bottom ul a:hover{color:#9FD6E4;}

/* ===== 入场动效 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-in{opacity:1;transform:none;}

/* ===== 响应式 ===== */
@media (max-width:1199.98px){
  .container{max-width:100%;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .check-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn-sm-cl{display:none;}
  .nav-menu{
    position:absolute;top:calc(100% + 12px);left:16px;right:16px;
    display:none;flex-direction:column;align-items:stretch;
    background:#fff;border:1px solid var(--line);border-radius:16px;
    box-shadow:var(--shadow-2);padding:10px;margin-left:0;
  }
  .nav-menu.is-open{display:flex;}
  .nav-menu ul{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu ul li a{
    height:48px;width:100%;padding:0 14px;border-radius:0;
    border-bottom:1px solid var(--line);font-size:15px;
  }
  .nav-menu ul li:last-child a{border-bottom:none;}
  .nav-link-item::after{display:none;}
  .nav-link-item.is-active{background:var(--brand-100);border-radius:8px;}
  .drawer-cta{display:block;padding-top:12px;}
  .drawer-cta .btn-cl{width:100%;}

  .page-strip{min-height:200px;padding:116px 0 34px;}
  .section{padding:52px 0;}
  .section-tight{padding:40px 0;}
  .faq-index{position:static;margin-bottom:26px;}
  .faq-index .index-title{display:none;}
  .faq-index ul{
    flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px;
    scrollbar-width:none;-ms-overflow-style:none;
  }
  .faq-index ul::-webkit-scrollbar{display:none;}
  .faq-index a{
    border-left:none;border:1px solid var(--line);background:#fff;
    border-radius:999px;white-space:nowrap;height:34px;line-height:32px;
    padding:0 16px;font-size:13px;border-radius:999px;
  }
  .faq-index a.is-current{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
  .faq-index .index-foot{display:none;}

  .cta-block{grid-template-columns:1fr;padding:32px;}
  .cta-actions{justify-content:flex-start;}

  .footer-grid{grid-template-columns:1fr;gap:0;}
  .footer-col{border-bottom:1px solid rgba(255,255,255,.12);}
  .footer-col h4{display:none;}
  .footer-acc-head{
    display:flex;align-items:center;justify-content:space-between;width:100%;
    background:transparent;border:none;color:#fff;font-size:14px;font-weight:600;
    padding:16px 0;cursor:pointer;text-align:left;
  }
  .footer-acc-head svg{width:16px;height:16px;transition:transform .25s ease;}
  .footer-col.is-open .footer-acc-head svg{transform:rotate(180deg);}
  .footer-panel{display:none;padding-bottom:16px;}
  .footer-col.is-open .footer-panel{display:block;}
  .footer-brand-wrap .footer-panel{display:block;padding-top:8px;}
}
@media (max-width:767.98px){
  body{font-size:15px;}
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:48px 0;}
  .page-strip{padding-top:104px;}
  .page-strip h1{font-size:26px;}
  .strip-lead{font-size:13.5px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:24px;}
  .qa-item{padding:18px;}
  .qa-item h3{font-size:17px;}
  .qa-group-head{flex-wrap:wrap;}
  .qa-group-head .group-desc{margin-left:0;width:100%;}
  .check-grid{grid-template-columns:1fr;gap:14px;}
  .cta-block{padding:26px 20px;}
  .footer-grid{gap:0;}
}
@media (max-width:575.98px){
  .btn-cl{width:100%;}
  .btn-sm-cl{width:auto;}
  .cta-actions{flex-direction:column;width:100%;}
  .footer-sub{flex-direction:column;}
  .footer-sub .btn-cl{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .footer-bottom ul{gap:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
/* ============ 1. 设计变量层 ============ */
:root{
  --brand-600:#137A99;
  --brand-700:#106A86;
  --brand-900:#0B3A4A;
  --brand-100:#E4F1F5;
  --accent-500:#E0803C;
  --accent-600:#D0732F;
  --accent-100:#FBEEDF;
  --ink-900:#16303A;
  --ink-600:#4E6672;
  --ink-400:#8399A4;
  --line:#E2EAEE;
  --bg:#F6F9FA;
  --surface:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 2px 8px rgba(11,58,74,.06);
  --shadow-2:0 10px 26px rgba(11,58,74,.12);
  --shadow-3:0 6px 20px rgba(11,58,74,.10);
  --container:1200px;
  --nav-h:76px;
  --nav-h-stuck:64px;
}

/* ============ 2. 基础 reset 层 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-600);
  background:var(--bg);
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink-900);font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(28px,4.2vw,44px);line-height:1.25;}
h2{font-size:clamp(22px,3vw,32px);line-height:1.3;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
.num,.count{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}
::selection{background:var(--brand-100);color:var(--brand-900);}

/* ============ 3. 布局容器 ============ */
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.section{padding:78px 0;}
.section-alt{background:var(--surface);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;}
.section-head h2{position:relative;}
.section-head .head-note{font-size:14px;line-height:1.6;color:var(--ink-400);max-width:420px;text-align:right;}
.text-link{font-size:14px;font-weight:600;color:var(--brand-600);white-space:nowrap;}
.text-link:hover{color:var(--brand-700);}
.text-link::after{content:"→";margin-left:6px;font-size:13px;}

/* ============ 4. 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  padding:16px 0;
  transition:padding .28s ease,background .28s ease,box-shadow .28s ease,border-color .28s ease;
  border-bottom:1px solid transparent;
}
.site-header .nav-shell{
  display:flex;align-items:center;gap:20px;
  height:var(--nav-h);
  padding:0 22px;
  border-radius:16px;
  background:rgba(255,255,255,.62);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  backdrop-filter:blur(14px) saturate(1.4);
  border:1px solid rgba(226,234,238,.9);
  box-shadow:var(--shadow-1);
  transition:height .28s ease,background .28s ease,border-color .28s ease,box-shadow .28s ease,border-radius .28s ease,padding .28s ease;
}
.site-header.is-stuck{
  padding:0;
  background:rgba(255,255,255,.97);
  box-shadow:var(--shadow-3);
  border-bottom-color:var(--line);
}
.site-header.is-stuck .nav-shell{
  height:var(--nav-h-stuck);
  padding:0;
  border-radius:0;
  background:transparent;
  border-color:transparent;
  box-shadow:none;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand-600) 0%,var(--brand-900) 100%);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 3px 10px rgba(11,58,74,.18);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:.02em;}
.brand-text span{font-size:11.5px;color:var(--ink-400);letter-spacing:.06em;}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-menu ul{display:flex;align-items:center;gap:4px;}
.nav-link-item{
  position:relative;display:inline-block;
  padding:9px 14px;font-size:15px;font-weight:600;color:var(--ink-600);
  border-radius:8px;transition:color .2s ease,background .2s ease;
}
.nav-link-item::after{
  content:"";position:absolute;left:14px;bottom:3px;width:0;height:2px;
  background:var(--brand-600);border-radius:2px;transition:width .2s ease;
}
.nav-link-item:hover{color:var(--brand-600);background:rgba(228,241,245,.6);}
.nav-link-item:hover::after{width:20px;}
.nav-link-item.is-active{color:var(--brand-600);}
.nav-link-item.is-active::after{width:20px;}
.drawer-cta{display:none;}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;cursor:pointer;padding:0 11px;
}
.nav-toggle span{display:block;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .22s ease,opacity .22s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 按钮体系 */
.btn-cl{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:all .22s ease;white-space:nowrap;
}
.btn-primary-cl{background:var(--brand-600);color:#fff;box-shadow:0 4px 12px rgba(19,122,153,.22);}
.btn-primary-cl:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary-cl:active{transform:translateY(0);}
.btn-accent-cl{background:var(--accent-500);color:#fff;box-shadow:0 4px 12px rgba(224,128,60,.24);}
.btn-accent-cl:hover{background:#E88C4C;color:#fff;transform:translateY(-1px);}
.btn-accent-cl:active{transform:translateY(0);}
.btn-ghost-cl{background:transparent;color:#fff;border-color:rgba(255,255,255,.7);}
.btn-ghost-cl:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}
.btn-outline-cl{background:#fff;color:var(--brand-600);border-color:var(--line);}
.btn-outline-cl:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-600);}
.btn-sm-cl{height:40px;padding:0 18px;font-size:14px;}
.btn-lg-cl{height:50px;padding:0 30px;font-size:16px;}
.btn-block-cl{width:100%;}

/* 徽标 */
.tag-cl{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.tag-brand{background:var(--brand-100);color:var(--brand-600);}
.tag-accent{background:var(--accent-100);color:var(--accent-600);}

/* ============ 5. 分类页头部条 ============ */
.cat-hero{
  background:linear-gradient(180deg,var(--brand-100) 0%,var(--bg) 100%);
  padding:152px 0 58px;
  min-height:260px;
  border-bottom:1px solid var(--line);
}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--ink-400);height:44px;}
.crumb a{color:var(--ink-400);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:#C3D2D8;}
.crumb .current{color:var(--brand-600);font-weight:600;}
.cat-hero h1{max-width:840px;margin-bottom:14px;}
.cat-lead{font-size:14px;line-height:1.8;color:var(--ink-600);max-width:760px;}
.cat-hero .hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}

/* ============ 6. 步骤流 ============ */
.step-flow{counter-reset:step;}
.step-item{
  position:relative;display:grid;grid-template-columns:56px 1fr;gap:24px;
  padding-bottom:26px;
}
.step-item:last-child{padding-bottom:0;}
.step-item::before{
  content:"";position:absolute;left:27px;top:64px;bottom:0;width:2px;
  background:rgba(19,122,153,.2);border-radius:2px;
}
.step-item:last-child::before{display:none;}
.step-num{
  width:56px;height:56px;border-radius:50%;
  background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;font-variant-numeric:tabular-nums;
  position:relative;z-index:1;border:4px solid var(--bg);
}
.step-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px 26px;box-shadow:var(--shadow-1);
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.step-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#D3E4EA;}
.step-card h3{margin-bottom:10px;}
.step-card p{font-size:15px;line-height:1.85;color:var(--ink-600);}
.step-tip{
  margin-top:14px;padding:12px 16px;border-left:3px solid var(--accent-500);
  background:var(--accent-100);border-radius:0 10px 10px 0;
  font-size:13.5px;line-height:1.7;color:#8A5A2E;
}
.step-tip strong{color:var(--accent-600);font-weight:600;}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}

/* ============ 7. 图文区块 ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center;}
.split-media{position:relative;}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-card);box-shadow:var(--shadow-2);}
.split-media .float-card{
  position:absolute;right:-18px;bottom:-22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-2);padding:16px 20px;min-width:170px;
}
.float-card .fc-num{font-size:26px;font-weight:700;color:var(--brand-600);line-height:1.2;font-variant-numeric:tabular-nums;}
.float-card .fc-label{font-size:12.5px;color:var(--ink-400);}
.split-body h2{margin-bottom:16px;}
.split-body p{font-size:15.5px;line-height:1.85;color:var(--ink-600);margin-bottom:14px;}
.check-list li{
  position:relative;padding-left:28px;font-size:15px;line-height:1.9;color:var(--ink-600);
}
.check-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:14px;height:14px;border-radius:50%;
  background:var(--brand-100);
}
.check-list li::after{
  content:"";position:absolute;left:7px;top:15.5px;width:4px;height:7px;
  border-right:2px solid var(--brand-600);border-bottom:2px solid var(--brand-600);
  transform:rotate(40deg);
}

/* ============ 8. 表格 ============ */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-img);
  background:var(--surface);box-shadow:var(--shadow-1);
  -webkit-overflow-scrolling:touch;
}
.table-wrap::-webkit-scrollbar{height:6px;}
.table-wrap::-webkit-scrollbar-thumb{background:#D3E1E7;border-radius:6px;}
table.cmp{width:100%;border-collapse:separate;border-spacing:0;min-width:680px;}
table.cmp th,table.cmp td{padding:14px 18px;text-align:left;font-size:14.5px;vertical-align:top;}
table.cmp thead th{
  background:var(--brand-100);color:var(--brand-900);font-weight:600;font-size:14px;
  border-bottom:1px solid var(--line);white-space:nowrap;
}
table.cmp tbody td{border-bottom:1px solid var(--line);color:var(--ink-600);line-height:1.7;}
table.cmp tbody tr:last-child td{border-bottom:none;}
table.cmp tbody tr:hover td{background:#FAFCFD;}
table.cmp td:first-child{font-weight:600;color:var(--ink-900);white-space:nowrap;}

/* ============ 9. 信息卡列表 ============ */
.info-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.info-item{
  display:flex;gap:16px;padding:22px 24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);
  transition:box-shadow .25s ease,transform .25s ease;
}
.info-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.info-icon{
  width:44px;height:44px;flex:0 0 auto;border-radius:12px;
  background:var(--brand-100);display:flex;align-items:center;justify-content:center;
}
.info-icon svg{width:22px;height:22px;stroke:var(--brand-600);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.info-item h4{font-size:16px;font-weight:600;color:var(--ink-900);margin-bottom:6px;}
.info-item p{font-size:14px;line-height:1.75;color:var(--ink-600);}

/* ============ 10. FAQ ============ */
.faq-wrap{max-width:calc(100% / 12 * 8 + 0px);margin:0 auto;}
.accordion-item{
  border:1px solid var(--line) !important;border-radius:12px !important;
  margin-bottom:10px;overflow:hidden;background:var(--surface);
  box-shadow:var(--shadow-1);
}
.accordion-button{
  display:flex;align-items:center;gap:14px;
  padding:18px 20px;background:var(--surface) !important;
  color:var(--ink-900) !important;font-size:16px;font-weight:600;line-height:1.5;
  box-shadow:none !important;border-radius:12px !important;
}
.accordion-button:not(.collapsed){color:var(--brand-600) !important;}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(19,122,153,.14) !important;border-color:var(--brand-600) !important;}
.faq-num{
  width:24px;height:24px;flex:0 0 auto;border-radius:50%;
  background:var(--brand-100);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;font-variant-numeric:tabular-nums;
}
.faq-q{flex:1 1 auto;text-align:left;}
.accordion-button::after{
  flex:0 0 auto;width:11px !important;height:11px !important;margin-left:8px;
  background-image:none !important;
  border-right:2px solid var(--ink-400);border-bottom:2px solid var(--ink-400);
  transform:rotate(45deg) translateY(-3px);
  transition:transform .25s ease,border-color .25s ease;
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg) translateY(-3px);border-color:var(--brand-600);}
.accordion-body{padding:0 20px 20px 58px;}
.accordion-body p{
  font-size:15px;line-height:1.8;color:var(--ink-600);
  border-top:1px solid var(--line);padding-top:16px;
}

/* ============ 11. CTA 区块 ============ */
.cta-band{
  background:linear-gradient(135deg,var(--brand-900) 0%,#12566B 100%);
  border-radius:20px;padding:54px 40px;text-align:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.35;pointer-events:none;
}
.cta-inner{position:relative;z-index:1;max-width:620px;margin:0 auto;}
.cta-band h2{color:#fff;margin-bottom:14px;}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;line-height:1.8;margin-bottom:26px;}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}

/* ============ 12. 页脚 ============ */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand{margin-bottom:16px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text span{color:rgba(255,255,255,.5);}
.site-footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.04em;}
.footer-panel p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin-bottom:16px;}
.footer-contact li{font-size:13.5px;line-height:2;color:rgba(255,255,255,.5);}
.footer-panel ul li a{
  display:inline-block;font-size:14px;line-height:36px;color:rgba(255,255,255,.72);
  transition:color .2s ease,transform .2s ease;
}
.footer-panel ul li a:hover{color:var(--brand-100);transform:translateX(2px);}
.footer-acc-head{
  display:none;width:100%;background:none;border:none;padding:0;
  font-size:14px;font-weight:600;color:#fff;align-items:center;justify-content:space-between;
}
.footer-acc-head svg{width:18px;height:18px;transition:transform .22s ease;}
.footer-col.is-open .footer-acc-head svg{transform:rotate(180deg);}
.footer-note{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.6);margin-bottom:14px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 26px;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom ul{display:flex;gap:20px;flex-wrap:wrap;}
.footer-bottom ul li a{font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom ul li a:hover{color:var(--brand-100);}

/* ============ 13. 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.in-view{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ============ 14. 响应式断点 ============ */
@media (max-width:1199.98px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:34px;}
  .footer-col:last-child{grid-column:1 / -1;}
}
@media (max-width:991.98px){
  .nav-menu{
    position:fixed;top:12px;left:16px;right:16px;z-index:1040;
    display:block;margin:0;padding:10px 12px 14px;
    background:#fff;border-radius:16px;box-shadow:var(--shadow-2);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
    max-height:calc(100vh - 24px);overflow-y:auto;
  }
  .nav-menu.is-open{opacity:1;visibility:visible;transform:none;}
  .nav-menu ul{display:block;}
  .nav-menu ul li + li{border-top:1px solid var(--line);}
  .nav-menu ul li a{display:flex;align-items:center;height:48px;padding:0 8px;font-size:16px;border-radius:8px;}
  .nav-menu ul li a::after{display:none;}
  .drawer-cta{display:block;padding:14px 8px 4px;}
  .drawer-cta .btn-cl{width:100%;}
  .nav-actions .btn-sm-cl{display:none;}
  .nav-toggle{display:flex;}
  .split{grid-template-columns:1fr;gap:34px;}
  .split-media .float-card{right:14px;bottom:-18px;}
  .info-list{grid-template-columns:1fr;}
  .faq-wrap{max-width:100%;}
  .section{padding:60px 0;}
  .cat-hero{padding-top:132px;min-height:200px;}
}
@media (max-width:767.98px){
  body{font-size:15px;}
  .section{padding:48px 0;}
  .container{padding:0 16px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:24px;}
  .section-head .head-note{text-align:left;}
  h3{font-size:18px;}
  .step-item{grid-template-columns:44px 1fr;gap:14px;}
  .step-num{width:44px;height:44px;font-size:15px;border-width:3px;}
  .step-item::before{left:21px;top:52px;}
  .step-card{padding:20px 18px;}
  .cat-hero{padding:118px 0 40px;}
  .cta-band{padding:38px 22px;}
  .footer-grid{grid-template-columns:1fr;gap:0;padding-bottom:26px;}
  .footer-col{border-bottom:1px solid rgba(255,255,255,.12);padding:16px 0;}
  .footer-col h4{display:none;}
  .footer-acc-head{display:flex;}
  .footer-col .footer-panel{display:none;padding-top:12px;}
  .footer-col.is-open .footer-panel{display:block;}
  .footer-brand-wrap{padding-top:0;}
  .footer-brand-wrap .footer-panel{display:block;}
  .footer-bottom{justify-content:flex-start;}
}
@media (max-width:575.98px){
  h1{font-size:26px;}
  h2{font-size:21px;}
  .btn-cl{width:100%;}
  .cta-actions .btn-cl{width:100%;}
  .split-media .float-card{position:static;margin-top:14px;right:auto;bottom:auto;}
  .brand-text span{display:none;}
  .crumb{height:auto;padding:10px 0;}
}