/* roulang page: index */
:root{
  --brand-700:#0B6F66;
  --brand-600:#0E8F82;
  --brand-500:#12A594;
  --brand-400:#2ED3BD;
  --brand-050:#E8F7F4;
  --accent-600:#E2760C;
  --accent-500:#F59E0B;
  --accent-050:#FFF4E0;
  --ink-900:#12201E;
  --ink-700:#2E4540;
  --ink-500:#5A6B67;
  --ink-300:#93A4A0;
  --line:#E2EDEA;
  --bg:#F5F9F8;
  --surface:#FFFFFF;
  --dark:#0A2421;
  --r-xl:24px;
  --r-lg:22px;
  --r-md:18px;
  --r-sm:12px;
  --sh-1:0 1px 2px rgba(10,36,33,.05);
  --sh-2:0 10px 28px rgba(10,36,33,.10);
  --sh-3:0 18px 48px rgba(10,36,33,.16);
  --grad-brand:linear-gradient(135deg,#0E8F82 0%,#19B7A4 48%,#3ED9C0 100%);
  --grad-cta:linear-gradient(120deg,#FF9A3D 0%,#F2760C 100%);
  --sidebar-w:248px;
  --focus:0 0 0 3px rgba(46,211,189,.45);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.75;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-500);text-decoration:underline;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink-900);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:8px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px;}

/* ---------- 左侧 App Shell ---------- */
.shell{display:flex;min-height:100vh;}
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:18px 16px 20px;z-index:60;
}
.brand{display:flex;align-items:center;gap:10px;height:46px;padding:0 8px;margin-bottom:18px;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--grad-brand);
  display:flex;align-items:center;justify-content:center;flex:none;
  box-shadow:0 4px 12px rgba(18,165,148,.28);
}
.brand-mark span{width:11px;height:11px;border:2px solid #fff;border-radius:3px;border-bottom-width:5px;display:block;}
.brand-name{font-size:16px;font-weight:700;letter-spacing:.2px;color:var(--ink-900);white-space:nowrap;}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1;}
.side-link{
  display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;border-radius:12px;
  color:var(--ink-700);font-size:15px;position:relative;transition:background .18s ease,color .18s ease;
}
.side-link:hover{background:var(--brand-050);color:var(--brand-700);text-decoration:none;}
.side-link.active{background:var(--brand-050);color:var(--brand-700);font-weight:600;}
.side-link.active::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--grad-brand);}
.ico{width:20px;height:20px;flex:none;display:flex;align-items:center;justify-content:center;}
.ico svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.side-foot{margin-top:16px;padding-top:16px;border-top:1px solid var(--line);}
.side-cta{
  display:block;text-align:center;height:44px;line-height:44px;border-radius:999px;
  background:var(--grad-cta);color:#fff;font-weight:600;font-size:15px;
  box-shadow:0 8px 18px rgba(242,118,12,.24);transition:transform .18s ease,filter .18s ease;
}
.side-cta:hover{transform:translateY(-2px);color:#fff;text-decoration:none;filter:brightness(1.04);}
.account-state{display:flex;align-items:center;gap:8px;margin-top:12px;padding:0 4px;font-size:13px;color:var(--ink-500);}
.avatar-dot{width:22px;height:22px;border-radius:50%;background:var(--brand-050);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:var(--brand-600);}

.content{margin-left:var(--sidebar-w);flex:1;min-width:0;}

/* ---------- 移动顶栏 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:0 18px;
}
.topbar.scrolled{box-shadow:0 2px 12px rgba(10,36,33,.08);}
.burger{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);}
.burger span{display:block;width:16px;height:2px;background:var(--ink-700);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink-700);border-radius:2px;}
.burger span::before{top:-5px;}.burger span::after{top:5px;}
.top-brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;}
.top-cta{margin-left:auto;height:36px;padding:0 16px;line-height:36px;border-radius:999px;background:var(--grad-cta);color:#fff;font-size:14px;font-weight:600;}
.top-cta:hover{color:#fff;text-decoration:none;}
.mask{position:fixed;inset:0;background:rgba(10,36,33,.45);opacity:0;visibility:hidden;transition:opacity .22s ease;z-index:65;}
.mask.show{opacity:1;visibility:visible;}

/* ---------- 通用区块 ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.sec-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3;}
.sec-head p{margin-top:10px;color:var(--ink-500);font-size:15px;max-width:52ch;}
.sec-more{font-size:15px;font-weight:600;white-space:nowrap;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:999px;
  background:var(--brand-050);color:var(--brand-700);font-size:12.5px;font-weight:600;letter-spacing:.4px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:999px;font-weight:600;font-size:15px;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background .18s ease;
}
.btn-primary{background:var(--grad-cta);color:#fff;box-shadow:0 10px 22px rgba(242,118,12,.26);}
.btn-primary:hover{transform:translateY(-2px);color:#fff;text-decoration:none;filter:brightness(1.05);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-outline{background:#fff;border:1.5px solid var(--brand-600);color:var(--brand-700);}
.btn-outline:hover{background:var(--brand-050);transform:translateY(-2px);text-decoration:none;color:var(--brand-700);}
.btn-lg{height:52px;padding:0 32px;font-size:16px;}
.btn-block{width:100%;}

/* ---------- Hero ---------- */
.hero{padding:72px 0 64px;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;}
.hero h1{font-size:clamp(30px,4.6vw,48px);line-height:1.2;letter-spacing:-.02em;}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:var(--ink-500);text-align:justify;max-width:46ch;}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap;}
.trust{display:flex;gap:22px;margin-top:28px;flex-wrap:wrap;}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-700);}
.trust-item .dot{width:8px;height:8px;border-radius:50%;background:var(--grad-brand);flex:none;}
.hero-visual{position:relative;}
.hero-media{border-radius:var(--r-xl);overflow:hidden;position:relative;aspect-ratio:16/11;box-shadow:var(--sh-2);}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(140deg,rgba(18,165,148,.28),rgba(10,36,33,.12));}
.float-card{
  position:absolute;right:-12px;bottom:-16px;background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:16px 18px;box-shadow:var(--sh-3);min-width:172px;
}
.float-card .num{font-size:26px;font-weight:700;color:var(--brand-700);line-height:1.1;}
.float-card .lbl{font-size:13px;color:var(--ink-500);margin-top:4px;}

/* ---------- 指标条 ---------- */
.metrics{background:var(--brand-050);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric .num{font-size:28px;font-weight:700;color:var(--brand-700);line-height:1.15;}
.metric .num small{font-size:14px;font-weight:600;margin-left:2px;color:var(--brand-600);}
.metric .lbl{font-size:14px;color:var(--ink-500);margin-top:6px;}

/* ---------- 权益对比表 ---------- */
.table-wrap{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:#fff;box-shadow:var(--sh-1);}
table{width:100%;border-collapse:collapse;}
thead th{
  position:sticky;top:0;background:#fff;z-index:2;
  padding:18px 20px;text-align:left;font-size:14px;color:var(--ink-500);font-weight:600;
  border-bottom:1px solid var(--line);
}
thead th.plan-col{text-align:center;color:var(--ink-900);font-size:15px;}
thead th.recommend{position:relative;border-top:2px solid transparent;border-image:var(--grad-brand) 1;background:linear-gradient(180deg,var(--brand-050),#fff);}
.rec-badge{position:absolute;top:-11px;left:50%;transform:translateX(-50%);background:var(--accent-500);color:#fff;font-size:12px;font-weight:600;padding:2px 10px;border-radius:999px;white-space:nowrap;}
tbody td{padding:16px 20px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-700);}
tbody tr:last-child td{border-bottom:0;}
tbody tr:hover{background:#F7FCFB;}
tbody td.center{text-align:center;}
.dot-yes{display:inline-block;width:11px;height:11px;border-radius:50%;background:var(--brand-500);}
.dot-no{display:inline-block;width:14px;height:2px;border-radius:2px;background:var(--ink-300);vertical-align:middle;}
.price-cell{font-weight:700;color:var(--ink-900);}

/* ---------- 等级亮点卡 ---------- */
.levels{display:grid;grid-template-columns:1.1fr .95fr 1fr;gap:24px;align-items:start;}
.level-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;
  box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.level-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4);}
.level-card.offset{margin-top:24px;}
.level-top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.level-name{font-size:20px;font-weight:700;}
.num-badge{background:var(--grad-brand);color:#fff;font-size:13px;font-weight:700;padding:5px 12px;border-radius:999px;white-space:nowrap;}
.level-desc{margin-top:14px;color:var(--ink-500);font-size:15px;text-align:justify;}
.level-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.level-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-700);}
.level-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-400);margin-top:9px;flex:none;}
.level-foot{margin-top:24px;}

/* ---------- 内容预览网格 ---------- */
.preview-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.preview-card{
  grid-column:span 8;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.preview-card.side{grid-column:span 4;display:flex;flex-direction:column;}
.preview-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4);}
.preview-card .cover{aspect-ratio:16/10;overflow:hidden;}
.preview-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.preview-card:hover .cover img{transform:scale(1.03);}
.preview-body{padding:24px;display:flex;flex-direction:column;gap:10px;}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--brand-050);color:var(--brand-700);font-size:12.5px;font-weight:600;width:fit-content;
}
.tag.amber{background:var(--accent-050);color:var(--accent-600);}
.preview-body h3{font-size:18px;line-height:1.45;}
.preview-body p{color:var(--ink-500);font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- CMS 列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4);}
.post-card .cover{aspect-ratio:16/10;overflow:hidden;}
.post-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .cover img{transform:scale(1.03);}
.post-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-body h3{font-size:17px;line-height:1.5;}
.post-body p{font-size:14.5px;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{display:flex;align-items:center;gap:12px;margin-top:auto;font-size:13px;color:var(--ink-300);}
.empty-state{
  grid-column:1/-1;background:#fff;border:1px dashed var(--line);border-radius:var(--r-md);
  padding:56px 24px;text-align:center;color:var(--ink-500);
}
.empty-state .circle{
  width:64px;height:64px;border-radius:50%;margin:0 auto 16px;background:var(--brand-050);
  display:flex;align-items:center;justify-content:center;color:var(--brand-500);font-size:24px;font-weight:700;
}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;}
.steps::before{
  content:"";position:absolute;top:34px;left:6%;right:6%;border-top:2px dashed rgba(18,165,148,.28);z-index:0;
}
.step{position:relative;z-index:1;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px;box-shadow:var(--sh-1);}
.step:nth-child(even){margin-top:24px;}
.step .no{
  width:44px;height:44px;border-radius:14px;background:var(--grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;margin-bottom:16px;
}
.step h3{font-size:17px;}
.step p{margin-top:8px;font-size:14.5px;color:var(--ink-500);}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;}
.faq-item{border:1px solid var(--line);border-radius:14px;background:#fff;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease;}
.faq-item.open{border-color:rgba(46,211,189,.55);}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5;
}
.faq-q .arrow{width:18px;height:18px;flex:none;transition:transform .2s ease;color:var(--brand-500);}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;background:var(--brand-050);}
.faq-a p{padding:16px 22px 20px;font-size:15px;color:var(--ink-700);text-align:justify;}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--dark);border-radius:var(--r-lg);padding:56px;position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;width:520px;height:520px;right:-140px;top:-220px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,211,189,.34),transparent 68%);
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,32px);line-height:1.3;}
.cta-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
.cta-list li{display:flex;gap:10px;color:rgba(255,255,255,.78);font-size:15px;}
.cta-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-400);margin-top:9px;flex:none;}
.form-card{background:#fff;border-radius:var(--r-md);padding:28px;box-shadow:var(--sh-3);}
.form-card h3{font-size:17px;}
.form-field{margin-top:16px;}
.form-field label{display:block;font-size:13px;color:var(--ink-500);margin-bottom:6px;}
.input{
  width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;font-size:15px;transition:border-color .18s ease,box-shadow .18s ease;
}
.input::placeholder{color:var(--ink-300);}
.input:focus{outline:none;border-color:var(--brand-500);box-shadow:var(--focus);}
.form-note{margin-top:14px;font-size:13px;color:var(--ink-300);line-height:1.6;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.7);margin-top:88px;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:34ch;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{color:rgba(255,255,255,.68);font-size:14px;}
.footer-col a:hover{color:var(--brand-400);text-decoration:none;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sidebar-w:76px;}
  .sidebar{padding:18px 10px 20px;align-items:center;}
  .brand{justify-content:center;padding:0;}
  .brand-name{display:none;}
  .side-link{justify-content:center;padding:0;width:44px;}
  .side-link .txt{display:none;}
  .side-link:hover .txt{
    display:block;position:absolute;left:56px;top:50%;transform:translateY(-50%);
    background:var(--dark);color:#fff;padding:6px 12px;border-radius:10px;font-size:13px;
    white-space:nowrap;box-shadow:var(--sh-2);z-index:80;
  }
  .side-cta{width:44px;padding:0;font-size:0;}
  .side-cta::after{content:"开";font-size:14px;}
  .account-state{justify-content:center;}
  .account-state span{display:none;}
  .hero-grid{gap:30px;}
}
@media (max-width:1023px){
  .topbar{display:flex;}
  .sidebar{
    width:84%;max-width:320px;transform:translateX(-100%);
    transition:transform .26s ease;padding:18px 16px 20px;align-items:stretch;
  }
  .sidebar.open{transform:translateX(0);}
  .brand{justify-content:flex-start;padding:0 8px;}
  .brand-name{display:block;}
  .side-link{justify-content:flex-start;padding:0 12px;width:auto;}
  .side-link .txt{display:block;}
  .side-link:hover .txt{position:static;transform:none;background:none;color:inherit;padding:0;box-shadow:none;}
  .side-cta{width:auto;padding:0;font-size:15px;}
  .side-cta::after{content:none;}
  .account-state{justify-content:flex-start;}
  .account-state span{display:inline;}
  .content{margin-left:0;padding-top:56px;}
  .container{padding:0 28px;}
  .section{padding:64px 0;}
  .hero{padding:48px 0 40px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-sub{max-width:none;}
  .metrics{grid-template-columns:repeat(2,1fr);padding:26px;}
  .levels{grid-template-columns:1fr;}
  .level-card.offset{margin-top:0;}
  .preview-card,.preview-card.side{grid-column:span 12;}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .steps::before{display:none;}
  .step:nth-child(even){margin-top:0;}
  .cta-band{grid-template-columns:1fr;padding:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .post-grid{grid-template-columns:1fr;}
  .metrics{grid-template-columns:repeat(2,1fr);gap:18px;padding:22px;}
  .metric .num{font-size:24px;}
  .hero-actions .btn{width:100%;}
  .float-card{right:8px;bottom:-14px;padding:12px 14px;min-width:150px;}
  .cta-band{padding:30px 22px;gap:28px;}
  .form-card{padding:22px;}
  .table-wrap{border:0;box-shadow:none;background:transparent;}
  table,tbody,tr,td{display:block;width:100%;}
  thead{display:none;}
  tbody tr{
    background:#fff;border:1px solid var(--line);border-radius:14px;
    padding:14px 16px;margin-bottom:14px;box-shadow:var(--sh-1);
  }
  tbody tr:hover{background:#fff;}
  tbody td{
    display:flex;justify-content:space-between;gap:14px;border:0;padding:7px 0;font-size:14.5px;
  }
  tbody td::before{content:attr(data-label);color:var(--ink-500);font-size:13.5px;flex:none;}
  tbody td:first-child{
    display:block;font-weight:700;color:var(--ink-900);font-size:16px;
    padding-bottom:10px;border-bottom:1px dashed var(--line);margin-bottom:6px;
  }
  tbody td:first-child::before{display:none;}
  tbody td.center{justify-content:space-between;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .site-footer{padding:48px 0 24px;margin-top:56px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:480px){
  h1{letter-spacing:-.01em;}
  .btn{width:100%;}
  .trust{gap:14px;}
  .hero-media{aspect-ratio:16/12;}
}

/* roulang page: article */
:root{
  --brand-500:#12A594;--brand-600:#0E8F82;--brand-400:#2ED3BD;--brand-050:#E8F7F4;
  --accent-500:#F59E0B;--accent-600:#E2760C;--accent-050:#FFF4E0;
  --ink-900:#12201E;--ink-700:#2E4540;--ink-500:#5A6B67;--ink-300:#93A4A0;
  --line:#E2EDEA;--bg:#F5F9F8;--surface:#FFFFFF;--dark:#0A2421;
  --grad-brand:linear-gradient(135deg,#0E8F82 0%,#19B7A4 48%,#3ED9C0 100%);
  --grad-cta:linear-gradient(120deg,#FF9A3D 0%,#F2760C 100%);
  --r-lg:22px;--r-md:18px;--r-sm:12px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(10,36,33,.05);
  --sh-2:0 10px 28px rgba(10,36,33,.10);
  --sh-3:0 18px 48px rgba(10,36,33,.16);
  --side-w:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink-700);font-size:16px;line-height:1.75;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  -webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-500)}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.3;font-weight:700}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(46,211,189,.45);border-radius:8px}
.container{max-width:1200px;margin:0 auto;padding:0 40px;width:100%}
.num{font-variant-numeric:tabular-nums}

/* ============ 左侧 App Shell ============ */
.side-nav{position:fixed;top:0;left:0;bottom:0;width:var(--side-w);background:var(--surface);
  border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:60;
  transition:transform .26s ease}
.side-head{height:72px;display:flex;align-items:center;padding:0 20px;border-bottom:1px solid var(--line)}
.side-brand{display:flex;align-items:center;gap:10px;color:var(--ink-900)}
.brand-mark{width:28px;height:28px;flex:0 0 28px;border-radius:9px;background:var(--grad-brand);
  display:inline-flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(18,165,148,.35)}
.brand-mark span{display:block;width:11px;height:11px;border:2px solid #fff;border-radius:3px;transform:rotate(45deg)}
.brand-name{font-size:16px;font-weight:700;letter-spacing:.2px;color:var(--ink-900);white-space:nowrap}
.side-menu{flex:1;overflow-y:auto;padding:16px 14px;display:flex;flex-direction:column;gap:4px}
.side-link{position:relative;display:flex;align-items:center;gap:12px;height:44px;padding:0 14px;
  border-radius:12px;color:var(--ink-700);font-size:15px;transition:background .18s ease,color .18s ease}
.side-link .ico{display:inline-flex;color:var(--ink-500)}
.side-link .ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}
.side-link:hover{background:var(--brand-050);color:var(--brand-600)}
.side-link:hover .ico{color:var(--brand-600)}
.side-link.active{background:var(--brand-050);color:var(--brand-600);font-weight:600}
.side-link.active .ico{color:var(--brand-600)}
.side-link.active::before{content:"";position:absolute;left:0;top:11px;width:3px;height:22px;
  border-radius:0 3px 3px 0;background:var(--grad-brand)}
.side-foot{padding:16px 18px 20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px}
.account-row{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500)}
.account-row .dot{width:8px;height:8px;border-radius:50%;background:var(--ink-300);flex:0 0 8px}
.app-main{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column}
.app-main > main{flex:1}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;
  border-radius:var(--r-pill);font-size:15px;font-weight:600;border:1.5px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease}
.btn:active{transform:translateY(0);filter:brightness(.96)}
.btn-cta{background:var(--grad-cta);color:#fff;box-shadow:0 8px 20px rgba(242,118,12,.28)}
.btn-cta:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(242,118,12,.34)}
.btn-ghost{background:transparent;border-color:var(--brand-600);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-600);transform:translateY(-2px)}
.btn-plain{background:transparent;color:var(--ink-700);border-color:transparent}
.btn-plain:hover{background:var(--brand-050);color:var(--brand-600)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ============ 移动端顶栏 ============ */
.topbar{display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
  align-items:center;gap:12px;padding:0 14px}
.topbar-brand{display:flex;align-items:center;gap:9px;flex:1;min-width:0}
.topbar-brand .brand-name{font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.burger{width:40px;height:40px;border:1px solid var(--line);border-radius:12px;background:#fff;
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.burger span{display:block;width:17px;height:2px;border-radius:2px;background:var(--ink-700);transition:.2s}
.nav-mask{display:none;position:fixed;inset:0;background:rgba(10,36,33,.45);z-index:55;opacity:0;
  transition:opacity .24s ease}
.nav-mask.show{display:block;opacity:1}

/* ============ 文章头部 ============ */
.article-wrap{padding-top:36px;padding-bottom:88px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-500);margin-bottom:20px}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:var(--ink-300)}
.breadcrumb .cur{color:var(--ink-700);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}
.article-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:40px 44px;box-shadow:var(--sh-1)}
.article-head{padding-bottom:24px;border-bottom:1px solid var(--line);margin-bottom:30px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--brand-050);color:var(--brand-600);font-size:12.5px;font-weight:600}
.tag.accent{background:var(--accent-050);color:var(--accent-600)}
.article-head h1{font-size:clamp(26px,3.4vw,34px);line-height:1.32;letter-spacing:-.01em;margin-bottom:16px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:14px;color:var(--ink-500)}
.meta-row .m{display:inline-flex;align-items:center;gap:7px}
.meta-row .m svg{width:15px;height:15px;fill:none;stroke:var(--ink-300);stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}
.meta-row .dotline{width:4px;height:4px;border-radius:50%;background:var(--line)}

/* ============ 正文排版 ============ */
.article-body{font-size:17px;line-height:1.9;color:var(--ink-700);max-width:780px;
  text-align:justify;word-break:break-word}
.article-body > *:last-child{margin-bottom:0}
.article-body p{margin:0 0 1.4em}
.article-body h2{position:relative;padding-left:16px;font-size:clamp(21px,2.4vw,25px);
  margin:2em 0 .8em;letter-spacing:-.01em}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:20px;
  border-radius:2px;background:var(--grad-brand)}
.article-body h3{font-size:19px;margin:1.6em 0 .6em}
.article-body h4{font-size:17px;margin:1.4em 0 .5em}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.4em}
.article-body ul{list-style:none;padding-left:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.55em}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
  border-radius:50%;background:var(--brand-500)}
.article-body ol{list-style:decimal}
.article-body ol li{margin-bottom:.55em}
.article-body ol li::marker{color:var(--brand-500);font-weight:700}
.article-body blockquote{margin:1.6em 0;padding:18px 22px;background:var(--brand-050);
  border-left:4px solid var(--brand-500);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--ink-700)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:16px;margin:1.6em auto;box-shadow:var(--sh-1)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--ink-500);margin-top:10px}
.article-body table{width:100%;border-collapse:separate;border-spacing:0;margin:1.6em 0;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15px}
.article-body thead th{background:var(--brand-050);color:var(--ink-900);font-weight:600;
  text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.article-body tbody tr:nth-child(even) td{background:#FAFDFC}
.article-body tbody tr:last-child td{border-bottom:none}
.article-body pre{background:var(--dark);color:#DFF4F0;border-radius:12px;padding:18px 20px;
  overflow-x:auto;font-size:14px;line-height:1.7;margin:1.6em 0}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;
  background:var(--brand-050);color:var(--brand-600);padding:2px 6px;border-radius:6px}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0}

/* ============ 文末 ============ */
.article-foot{margin-top:40px;padding-top:26px;border-top:1px solid var(--line);max-width:780px}
.tag-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px}
.tag-line .lab{font-size:13px;color:var(--ink-500)}
.chip{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;font-size:13px;color:var(--ink-700)}
.chip:hover{border-color:rgba(46,211,189,.4);color:var(--brand-600);background:var(--brand-050)}
.pager{display:flex;flex-wrap:wrap;gap:14px}
.pager a{flex:1 1 220px;display:flex;flex-direction:column;gap:6px;padding:16px 18px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;transition:transform .18s ease,box-shadow .18s ease}
.pager a:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.pager .k{font-size:12.5px;color:var(--ink-500)}
.pager .v{font-size:15px;font-weight:600;color:var(--ink-900)}

/* 空态 */
.empty-state{text-align:center;padding:56px 24px;border:1px dashed var(--line);border-radius:var(--r-lg);
  background:#FBFEFD;max-width:780px}
.empty-state .ico{width:56px;height:56px;margin:0 auto 16px;border-radius:18px;background:var(--brand-050);
  display:flex;align-items:center;justify-content:center}
.empty-state .ico svg{width:26px;height:26px;fill:none;stroke:var(--brand-500);stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}
.empty-state h3{margin-bottom:8px;font-size:19px}
.empty-state p{color:var(--ink-500);margin-bottom:20px}

/* ============ 侧栏 ============ */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:28px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-1)}
.side-card h3{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--grad-brand)}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow-y:auto}
.toc-list a{font-size:14px;color:var(--ink-500);padding:7px 10px;border-radius:8px;line-height:1.5;
  border-left:2px solid transparent;transition:.18s}
.toc-list a:hover{background:var(--brand-050);color:var(--brand-600)}
.toc-list a.on{background:var(--brand-050);color:var(--brand-600);font-weight:600;
  border-left-color:var(--brand-500)}
.side-cta{background:var(--dark);border:none;color:#CFE6E2;position:relative;overflow:hidden}
.side-cta::after{content:"";position:absolute;right:-40px;top:-40px;width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,211,189,.32) 0%,rgba(46,211,189,0) 70%)}
.side-cta h3{color:#fff;font-size:16px}
.side-cta h3::before{background:var(--grad-cta)}
.side-cta p{font-size:13.5px;color:#A9C4C0;line-height:1.7;margin-bottom:16px}
.side-cta .btn{position:relative;z-index:1}

/* ============ 相关推荐 ============ */
.related{margin-top:72px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.sec-head h2{font-size:clamp(22px,2.6vw,28px);letter-spacing:-.01em}
.sec-head p{margin:8px 0 0;font-size:14.5px;color:var(--ink-500);max-width:560px}
.link-more{font-size:14px;font-weight:600;color:var(--brand-600);white-space:nowrap}
.link-more:hover{text-decoration:underline}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.card-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--brand-050)}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.5}
.card-body p{font-size:14px;color:var(--ink-500);margin:0;display:-webkit-box;-webkit-line-clamp:2;
  -webkit-box-orient:vertical;overflow:hidden;line-height:1.7}
.card-meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--ink-300);margin-top:auto;padding-top:6px}

/* ============ CTA 横幅 ============ */
.cta-band{margin-top:72px;position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:var(--dark);padding:48px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.cta-band::after{content:"";position:absolute;left:-60px;bottom:-90px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,211,189,.28) 0%,rgba(46,211,189,0) 70%)}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
.cta-band .lead{color:#A9C4C0;font-size:15px;max-width:460px}
.cta-list{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:20px}
.cta-list li{display:flex;align-items:center;gap:8px;font-size:14px;color:#CFE6E2}
.cta-list li::before{content:"";width:16px;height:16px;border-radius:50%;flex:0 0 16px;
  background:var(--grad-brand);box-shadow:inset 0 0 0 4px rgba(255,255,255,.16)}
.cta-form{position:relative;z-index:1;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-md);padding:24px;display:flex;flex-direction:column;gap:12px}
.cta-form label{font-size:13px;color:#A9C4C0}
.field{height:48px;width:100%;border-radius:12px;border:1px solid var(--line);background:#fff;
  padding:0 16px;font-size:15px;color:var(--ink-900);transition:border-color .18s ease,box-shadow .18s ease}
.field::placeholder{color:var(--ink-300)}
.field:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(46,211,189,.35)}
.cta-form .note{font-size:12.5px;color:#8FA9A5;margin:0}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#A9C4C0;padding:64px 0 26px;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700;
  letter-spacing:.2px;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.75;color:#93AFAB;margin:0;max-width:280px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#A9C4C0;font-size:14px}
.footer-col a:hover{color:var(--brand-400)}
.footer-bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:#7FA09B}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--side-w:76px}
  .side-nav{width:76px}
  .side-head{justify-content:center;padding:0}
  .side-brand .brand-name{display:none}
  .side-link{justify-content:center;padding:0}
  .side-link .txt{position:absolute;left:70px;top:50%;transform:translateY(-50%);
    background:var(--ink-900);color:#fff;font-size:13px;padding:6px 12px;border-radius:8px;
    white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .18s ease;z-index:80}
  .side-link:hover .txt{opacity:1}
  .side-foot{padding:14px 10px 18px;align-items:center}
  .side-foot .btn{padding:0;width:40px;height:40px;font-size:0}
  .side-foot .btn::after{content:"会";font-size:14px}
  .account-row span:last-child{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static}
  .toc-list{max-height:none;flex-direction:row;flex-wrap:wrap}
  .toc-list a{border-left:none;border:1px solid var(--line)}
  .cta-band{grid-template-columns:1fr;padding:40px 32px}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .side-nav{width:84%;max-width:320px;transform:translateX(-105%);box-shadow:var(--sh-3)}
  .side-nav.open{transform:translateX(0)}
  .side-head{justify-content:flex-start;padding:0 20px}
  .side-brand .brand-name{display:block}
  .side-link{justify-content:flex-start;padding:0 14px}
  .side-link .txt{position:static;transform:none;opacity:1;background:none;color:inherit;
    padding:0;font-size:15px}
  .side-foot{padding:16px 18px 20px;align-items:stretch}
  .side-foot .btn{padding:0 28px;width:100%;height:46px;font-size:15px}
  .side-foot .btn::after{content:""}
  .account-row span:last-child{display:inline}
  .app-main{margin-left:0;padding-top:56px}
  .article-wrap{padding-top:24px}
  .article-card{padding:28px 24px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .article-body{font-size:16px}
  .card-grid{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start;gap:10px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{margin-top:52px;padding:32px 22px}
  .related{margin-top:52px}
  .site-footer{padding:48px 0 22px;margin-top:60px}
  .btn{width:100%}
  .pager a{flex:1 1 100%}
  .article-body table{display:block;overflow-x:auto}
}
@media (max-width:520px){
  .article-head h1{font-size:24px}
  .breadcrumb .cur{max-width:200px}
  .footer-grid{grid-template-columns:1fr}
  .article-card{padding:22px 18px}
  .tag-line{gap:8px}
}

/* roulang page: category1 */
:root{
  --brand-700:#0B6E64;
  --brand-600:#0E8F82;
  --brand-500:#12A594;
  --brand-400:#2ED3BD;
  --brand-050:#E8F7F4;
  --accent-600:#E2760C;
  --accent-500:#F59E0B;
  --accent-050:#FFF4E0;
  --ink-900:#12201E;
  --ink-700:#2E4540;
  --ink-500:#5A6B67;
  --ink-300:#93A4A0;
  --line:#E2EDEA;
  --bg:#F5F9F8;
  --surface:#FFFFFF;
  --dark:#0A2421;
  --grad-brand:linear-gradient(135deg,#0E8F82 0%,#19B7A4 48%,#3ED9C0 100%);
  --grad-cta:linear-gradient(120deg,#FF9A3D 0%,#F2760C 100%);
  --r-xl:24px;
  --r-lg:22px;
  --r-md:18px;
  --r-sm:12px;
  --sh-1:0 1px 2px rgba(10,36,33,.05);
  --sh-2:0 10px 28px rgba(10,36,33,.10);
  --sh-3:0 18px 48px rgba(10,36,33,.16);
  --rail:248px;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-500);text-decoration:underline}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
:focus-visible{outline:3px solid rgba(46,211,189,.45);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.tnum{font-variant-numeric:tabular-nums}

/* ============ 布局骨架 ============ */
.app{padding-left:var(--rail);min-height:100vh}
.content-col{max-width:1200px;margin:0 auto;padding:0 40px}

/* ============ 侧栏 App Shell ============ */
.side-rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;z-index:80;
  padding:20px 16px 18px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  padding:6px 8px 0;height:56px;margin-bottom:18px;
}
.brand-mark{
  width:28px;height:28px;border-radius:9px;flex:0 0 28px;
  background:var(--grad-brand);
  display:grid;place-items:center;position:relative;
  box-shadow:0 4px 12px rgba(14,143,130,.28);
}
.brand-mark span{width:11px;height:11px;border-radius:3px;background:#fff;opacity:.92;transform:rotate(45deg)}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.2px;color:var(--ink-900);line-height:1.2}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1 1 auto}
.side-link{
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;border-radius:12px;
  color:var(--ink-700);font-size:15px;position:relative;
  transition:background .2s ease,color .2s ease;
}
.side-link:hover{background:var(--brand-050);color:var(--brand-700);text-decoration:none}
.side-link .ico{width:20px;height:20px;flex:0 0 20px;color:var(--ink-300);transition:color .2s ease}
.side-link:hover .ico{color:var(--brand-600)}
.side-link.active{
  background:var(--brand-050);color:var(--brand-700);font-weight:700;
}
.side-link.active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:0 3px 3px 0;background:var(--grad-brand);
}
.side-link.active .ico{color:var(--brand-600)}
.side-foot{padding-top:16px;border-top:1px solid var(--line);margin-top:16px}
.side-cta{
  display:flex;align-items:center;justify-content:center;
  height:44px;border-radius:999px;width:100%;
  background:var(--grad-cta);color:#fff;font-weight:600;font-size:15px;
  border:none;box-shadow:0 6px 18px rgba(226,118,12,.28);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.side-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(226,118,12,.34);text-decoration:none;color:#fff}
.side-cta:active{transform:translateY(0);filter:brightness(.96)}
.side-user{
  margin-top:12px;display:flex;align-items:center;gap:10px;
  padding:8px 10px;border-radius:12px;background:var(--bg);
  font-size:13px;color:var(--ink-500);
}
.side-user .dot{width:9px;height:9px;border-radius:50%;background:var(--ink-300);flex:0 0 9px}
.side-user.on .dot{background:var(--brand-400);box-shadow:0 0 0 4px rgba(46,211,189,.18)}
.side-user b{color:var(--ink-700)}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:90;
  background:rgba(255,255,255,.94);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:0 16px;
  transition:box-shadow .25s ease;
}
.topbar.scrolled{box-shadow:0 2px 12px rgba(10,36,33,.08)}
.hamburger{
  width:38px;height:38px;border-radius:11px;border:1px solid var(--line);
  background:#fff;display:grid;place-items:center;padding:0;color:var(--ink-700);
}
.hamburger span{display:block;width:16px;height:1.7px;background:currentColor;border-radius:2px;margin:2.5px 0}
.topbar .brand-text{font-size:15px}
.topbar-cta{
  margin-left:auto;height:36px;padding:0 16px;border-radius:999px;border:none;
  background:var(--grad-cta);color:#fff;font-size:13.5px;font-weight:600;
  display:inline-flex;align-items:center;
}
.scrim{
  display:none;position:fixed;inset:0;background:rgba(10,36,33,.45);z-index:85;
  opacity:0;transition:opacity .25s ease;
}
.scrim.show{display:block;opacity:1}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:999px;
  font-size:15.5px;font-weight:600;border:1.5px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,filter .2s ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0);filter:brightness(.96)}
.btn-primary{background:var(--grad-cta);color:#fff;box-shadow:0 8px 22px rgba(226,118,12,.28)}
.btn-primary:hover{box-shadow:0 14px 30px rgba(226,118,12,.34);color:#fff}
.btn-outline{background:#fff;border-color:var(--brand-600);color:var(--brand-700)}
.btn-outline:hover{background:var(--brand-050);color:var(--brand-700)}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:transparent}
.btn-ghost:hover{background:var(--brand-050)}
.btn-lg{height:52px;padding:0 32px;font-size:16.5px}
.btn-block{width:100%}

/* ============ 通用徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:var(--brand-050);color:var(--brand-700);
}
.badge.accent{background:var(--accent-050);color:var(--accent-600)}
.badge.dark{background:var(--dark);color:#BFEFE6}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:999px;background:var(--brand-050);
  color:var(--brand-700);font-size:12.5px;font-weight:600;
}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 22px;box-shadow:var(--sh-1);
}
.stat .num{
  font-size:28px;font-weight:800;letter-spacing:-.02em;color:var(--brand-700);
  font-variant-numeric:tabular-nums;line-height:1.15;
}
.stat .num small{font-size:13px;font-weight:600;color:var(--ink-500);margin-left:3px}
.stat .lbl{font-size:13.5px;color:var(--ink-500);margin-top:6px}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;border-radius:var(--r-xl);
  min-height:340px;display:flex;align-items:center;
  background-image:linear-gradient(105deg,rgba(10,36,33,.86) 0%,rgba(10,36,33,.62) 46%,rgba(10,36,33,.38) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--sh-2);
}
.hero::after{
  content:"";position:absolute;right:-90px;top:-90px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(62,217,192,.42),transparent 66%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;padding:56px 48px;max-width:760px}
.hero-crumb{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  font-size:13.5px;color:rgba(255,255,255,.62);margin-bottom:16px;
}
.hero-crumb a{color:rgba(255,255,255,.78)}
.hero-crumb a:hover{color:#fff}
.hero-crumb i{font-style:normal;opacity:.5}
.hero h1{
  font-size:clamp(28px,3.8vw,44px);line-height:1.2;letter-spacing:-.02em;
  color:#fff;font-weight:800;
}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,#3ED9C0,#8CF0DC);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{
  margin-top:16px;font-size:16.5px;line-height:1.8;color:rgba(255,255,255,.82);
  max-width:640px;
}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;font-size:13.5px;font-weight:600;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  color:#EAFBF7;backdrop-filter:blur(4px);
}
.chip .dot{width:7px;height:7px;border-radius:50%;background:var(--brand-400)}

/* ============ 板块 ============ */
.section{padding:88px 0 0}
.section:first-of-type{padding-top:40px}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:800}
.section-head p{margin-top:14px;color:var(--ink-500);font-size:15.5px;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--brand-600);
  text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad-brand)}

/* ============ 两列大卡 ============ */
.duo{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.big-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.big-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.big-card .cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg)}
.big-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.big-card:hover .cover img{transform:scale(1.03)}
.big-card .cover .tag{position:absolute;left:16px;top:16px;background:rgba(255,255,255,.92);color:var(--brand-700);box-shadow:var(--sh-1)}
.big-card .body{padding:28px 30px 30px;display:flex;flex-direction:column;gap:14px;flex:1}
.big-card h3{font-size:20px;line-height:1.45;font-weight:800}
.big-card .lede{color:var(--ink-500);font-size:15px;line-height:1.85}
.check-list{display:flex;flex-direction:column;gap:12px;margin-top:2px}
.check-list li{display:flex;gap:11px;align-items:flex-start;font-size:15px;color:var(--ink-700);line-height:1.75}
.check-list .mark{
  flex:0 0 18px;width:18px;height:18px;border-radius:50%;margin-top:5px;
  background:var(--brand-050);color:var(--brand-600);display:grid;place-items:center;
}
.check-list .mark svg{width:11px;height:11px;stroke-width:2.6}
.card-foot{margin-top:auto;padding-top:18px;border-top:1px dashed var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px}
.card-foot .meta{font-size:13px;color:var(--ink-300)}
.text-link{font-size:14.5px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px}
.text-link:hover{color:var(--brand-500);text-decoration:underline}

/* ============ 步骤时间线 ============ */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative}
.steps::before{
  content:"";position:absolute;left:4%;right:4%;top:26px;height:0;
  border-top:2px dashed rgba(18,165,148,.32);
}
.step{position:relative;z-index:1;display:flex;flex-direction:column;gap:12px}
.step:nth-child(even){margin-top:26px}
.step .idx{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
  background:var(--grad-brand);color:#fff;font-weight:800;font-size:16px;
  font-variant-numeric:tabular-nums;box-shadow:0 8px 20px rgba(14,143,130,.26);
}
.step .card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 20px 22px;box-shadow:var(--sh-1);flex:1;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.step:hover .card{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.step h4{font-size:16.5px;font-weight:700;margin-bottom:8px}
.step p{font-size:14.5px;color:var(--ink-500);line-height:1.8}

/* ============ 异常对照 ============ */
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:8px;box-shadow:var(--sh-1);
}
.issue{
  display:grid;grid-template-columns:260px 1fr;gap:26px;align-items:start;
  padding:24px 26px;border-radius:var(--r-md);
  transition:background .2s ease;
}
.issue + .issue{border-top:1px solid var(--line)}
.issue:hover{background:rgba(232,247,244,.6)}
.issue h4{font-size:17px;font-weight:700;display:flex;align-items:center;gap:9px}
.issue h4 .pin{width:8px;height:8px;border-radius:50%;background:var(--accent-500);flex:0 0 8px}
.issue p{font-size:15px;color:var(--ink-500);line-height:1.85}
.issue .order{
  font-size:12.5px;color:var(--ink-300);margin-top:6px;font-variant-numeric:tabular-nums;
}

/* ============ 深色 HUD 面板 ============ */
.hud{
  background:var(--dark);border-radius:var(--r-lg);color:#DCEFEB;
  padding:44px 46px;position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
  box-shadow:var(--sh-3);
}
.hud::after{
  content:"";position:absolute;left:-120px;bottom:-140px;width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,165,148,.4),transparent 68%);
}
.hud > *{position:relative;z-index:2}
.hud h2{color:#fff;font-size:clamp(22px,2.4vw,30px);line-height:1.35;font-weight:800}
.hud p{color:rgba(220,239,235,.76);margin-top:14px;font-size:15.5px;line-height:1.85}
.hud-list{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.hud-list li{display:flex;gap:11px;align-items:flex-start;font-size:15px;color:rgba(220,239,235,.88)}
.hud-list .tick{
  flex:0 0 20px;width:20px;height:20px;border-radius:6px;margin-top:4px;
  background:rgba(46,211,189,.18);color:var(--brand-400);display:grid;place-items:center;
}
.hud-list .tick svg{width:12px;height:12px;stroke-width:2.6}
.hud-stats{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hud-stat{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-md);padding:18px 18px 20px;
}
.hud-stat .n{font-size:24px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums;line-height:1.2}
.hud-stat .n small{font-size:12.5px;color:var(--brand-400);margin-left:3px;font-weight:600}
.hud-stat .s{font-size:13px;color:rgba(220,239,235,.6);margin-top:5px}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(46,211,189,.4)}
.faq-item.open{border-color:rgba(46,211,189,.55);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 22px;background:none;border:none;text-align:left;
  font-size:16px;font-weight:700;color:var(--ink-900);line-height:1.6;
}
.faq-q .arrow{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  background:var(--brand-050);color:var(--brand-600);display:grid;place-items:center;
  transition:transform .2s ease,background .2s ease;
}
.faq-q .arrow svg{width:13px;height:13px;stroke-width:2.4}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);background:var(--brand-500);color:#fff}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .28s ease;
}
.faq-a .inner{
  margin:0 14px 14px;padding:18px 20px;border-radius:14px;background:var(--brand-050);
  font-size:15px;color:var(--ink-700);line-height:1.9;
}

/* ============ CTA 表单 ============ */
.cta-block{
  margin-top:88px;background:var(--dark);border-radius:var(--r-lg);
  padding:52px 48px;display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  position:relative;overflow:hidden;box-shadow:var(--sh-3);
}
.cta-block::after{
  content:"";position:absolute;right:-140px;top:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(62,217,192,.32),transparent 70%);
}
.cta-block > *{position:relative;z-index:2}
.cta-block h2{color:#fff;font-size:clamp(23px,2.5vw,32px);line-height:1.35;font-weight:800}
.cta-block .desc{color:rgba(220,239,235,.74);margin-top:14px;font-size:15.5px;line-height:1.85}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;color:rgba(220,239,235,.9);font-size:15px}
.cta-points .d{flex:0 0 8px;width:8px;height:8px;border-radius:50%;background:var(--brand-400);margin-top:9px}
.form-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:26px;
}
.form-card label{display:block;font-size:13.5px;color:rgba(220,239,235,.72);margin-bottom:8px;font-weight:600}
.form-card input{
  width:100%;height:48px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.94);
  padding:0 14px;font-size:15px;color:var(--ink-900);margin-bottom:16px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-card input::placeholder{color:var(--ink-300)}
.form-card input:focus{outline:none;border-color:var(--brand-400);box-shadow:0 0 0 3px rgba(46,211,189,.35)}
.form-note{font-size:13px;color:rgba(220,239,235,.55);margin-top:12px;line-height:1.7}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--dark);color:rgba(220,239,235,.72);
  margin-top:96px;padding:64px 0 28px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;letter-spacing:.2px}
.footer-brand .brand-mark{width:28px;height:28px;flex:0 0 28px}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(220,239,235,.6);max-width:320px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{color:rgba(220,239,235,.68);font-size:14.5px}
.footer-col a:hover{color:var(--brand-400);text-decoration:none}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;font-size:13px;color:rgba(220,239,235,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--rail:76px}
  .side-rail{padding:18px 10px}
  .brand{justify-content:center;padding:6px 0 0}
  .brand-text{display:none}
  .side-link{justify-content:center;padding:0}
  .side-link .txt{display:none}
  .side-link.active::before{top:8px;bottom:8px}
  .side-cta{font-size:0;padding:0}
  .side-cta::after{content:"开通";font-size:13px}
  .side-user{justify-content:center;padding:8px 4px}
  .side-user span{display:none}
  .content-col{padding:0 32px}
}
@media (max-width:1023px){
  :root{--rail:0px}
  .app{padding-left:0;padding-top:56px}
  .topbar{display:flex}
  .side-rail{
    width:84%;max-width:320px;padding:22px 16px;
    transform:translateX(-102%);transition:transform .28s ease;
    box-shadow:0 0 40px rgba(10,36,33,.24);
  }
  .side-rail.open{transform:translateX(0)}
  .brand{justify-content:flex-start;padding:6px 8px 0}
  .brand-text{display:block}
  .side-link{justify-content:flex-start;padding:0 12px}
  .side-link .txt{display:inline}
  .side-cta{font-size:15px;padding:0}
  .side-cta::after{content:none}
  .side-user{justify-content:flex-start;padding:8px 10px}
  .side-user span{display:inline}
  .content-col{padding:0 28px}
  .section{padding-top:64px}
  .hero-inner{padding:44px 34px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .step:nth-child(even){margin-top:0}
  .issue{grid-template-columns:1fr;gap:10px;padding:22px}
  .hud{grid-template-columns:1fr;padding:36px 32px;gap:28px}
  .cta-block{grid-template-columns:1fr;gap:30px;padding:40px 32px;margin-top:64px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .content-col{padding:0 18px}
  .section{padding-top:48px}
  .duo{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr 1fr;gap:12px}
  .hero{border-radius:var(--r-md);min-height:auto}
  .hero-inner{padding:36px 22px}
  .hero-sub{font-size:15.5px}
  .big-card .body{padding:22px 20px 24px}
  .steps{grid-template-columns:1fr}
  .hud-stats{grid-template-columns:1fr 1fr}
  .btn{width:100%}
  .card-foot{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{margin-top:64px;padding:48px 0 24px}
}
@media (max-width:520px){
  h1.hero-title{font-size:26px}
  .stat-row{grid-template-columns:1fr}
  .hud-stats{grid-template-columns:1fr}
  .hud,.cta-block{padding:28px 20px;border-radius:var(--r-md)}
  .form-card{padding:20px 18px}
  .faq-q{padding:12px 16px;font-size:15.5px}
  .faq-a .inner{margin:0 10px 12px;padding:16px}
  .container{padding:0 18px}
}

/* roulang page: category2 */
:root{
  --brand-700:#0B6F64;--brand-600:#0E8F82;--brand-500:#12A594;--brand-400:#2ED3BD;--brand-050:#E8F7F4;
  --accent-600:#E2760C;--accent-500:#F59E0B;--accent-050:#FFF4E0;
  --ink-900:#12201E;--ink-700:#2E4540;--ink-500:#5A6B67;--ink-300:#93A4A0;
  --line:#E2EDEA;--bg:#F5F9F8;--surface:#FFFFFF;--dark:#0A2421;
  --grad-brand:linear-gradient(135deg,#0E8F82 0%,#19B7A4 48%,#3ED9C0 100%);
  --grad-cta:linear-gradient(120deg,#FF9A3D 0%,#F2760C 100%);
  --sh-1:0 1px 2px rgba(10,36,33,.05);
  --sh-2:0 10px 28px rgba(10,36,33,.10);
  --sh-3:0 18px 48px rgba(10,36,33,.16);
  --r-lg:22px;--r-md:18px;--r-sm:12px;--r-pill:999px;
  --shell:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink-700);background:var(--bg);
  font-variant-numeric:tabular-nums;
}
body.lock{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-500);text-decoration:underline}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.3}
ul{margin:0;padding:0;list-style:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(46,211,189,.45);border-radius:10px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:12px;z-index:200}
.skip:focus{left:16px;top:16px}

/* ===== 侧栏 App Shell ===== */
.app-shell{
  position:fixed;left:0;top:0;bottom:0;width:var(--shell);z-index:60;
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:18px 16px 20px;
  box-shadow:var(--sh-1);transition:transform .26s ease,width .26s ease;
}
.brand{display:flex;align-items:center;gap:10px;height:56px;padding:0 6px;margin-bottom:14px}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--grad-brand);
  display:inline-flex;align-items:center;justify-content:center;flex:none;
  box-shadow:0 6px 16px rgba(18,165,148,.35);
}
.brand-mark span{width:11px;height:11px;border:2px solid #fff;border-radius:3px;display:block;transform:rotate(45deg)}
.brand-txt{font-size:16px;font-weight:700;letter-spacing:.2px;color:var(--ink-900);white-space:nowrap}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1;overflow-y:auto}
.side-link{
  display:flex;align-items:center;gap:12px;height:44px;padding:0 12px;border-radius:12px;
  color:var(--ink-700);font-size:14.5px;font-weight:500;position:relative;white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.side-link:hover{background:var(--brand-050);color:var(--brand-700);text-decoration:none}
.side-link .ico{width:20px;height:20px;flex:none;display:inline-flex;align-items:center;justify-content:center;color:var(--ink-500)}
.side-link .ico svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.side-link.active{background:var(--brand-050);color:var(--brand-700);font-weight:700}
.side-link.active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--brand-500)}
.side-foot{margin-top:14px;border-top:1px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:10px}
.side-cta{
  display:flex;align-items:center;justify-content:center;height:46px;border-radius:var(--r-pill);
  background:var(--grad-cta);color:#fff;font-weight:700;font-size:15px;box-shadow:0 8px 20px rgba(242,118,12,.28);
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.side-cta:hover{color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:0 12px 26px rgba(242,118,12,.34)}
.side-cta:active{transform:translateY(0);filter:brightness(.96)}
.side-account{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-500);padding:2px 6px}
.dot-state{width:9px;height:9px;border-radius:50%;background:var(--brand-400);box-shadow:0 0 0 4px rgba(46,211,189,.18);flex:none}
.side-account b{color:var(--ink-700);font-weight:600}

/* ===== 移动端顶栏 ===== */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:0 14px;
  transition:box-shadow .2s ease;
}
.topbar.scrolled{box-shadow:0 2px 12px rgba(10,36,33,.08)}
.burger{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;background:var(--brand-050);color:var(--brand-700)}
.burger svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.topbar .brand-txt{font-size:15px}
.topbar-cta{margin-left:auto;height:38px;padding:0 16px;border-radius:var(--r-pill);background:var(--grad-cta);color:#fff;font-size:13.5px;font-weight:700;display:inline-flex;align-items:center}
.topbar-cta:hover{color:#fff;text-decoration:none}
.shell-mask{
  position:fixed;inset:0;background:rgba(10,36,33,.45);z-index:55;opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;
}
.shell-mask.show{opacity:1;visibility:visible}

/* ===== 主区 ===== */
.app-main{margin-left:var(--shell);min-height:100vh;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
main{flex:1}
.section{padding:88px 0}
.section.tight{padding:64px 0}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:12px}
.sec-head p{font-size:16px;color:var(--ink-500)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--brand-050);color:var(--brand-700);font-size:12.5px;font-weight:700;letter-spacing:.4px;
  margin-bottom:16px;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand-500);display:block}

/* ===== 分类 Hero ===== */
.cat-hero{position:relative;overflow:hidden;background:var(--dark);color:#fff}
.cat-hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.55;transform:scale(1.02);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(10,36,33,.88) 0%,rgba(10,36,33,.62) 52%,rgba(14,143,130,.42) 100%);
}
.cat-hero-inner{position:relative;z-index:2;padding:72px 40px 76px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:20px;flex-wrap:wrap}
.crumb a{color:rgba(255,255,255,.82)}
.crumb a:hover{color:#fff}
.crumb span{color:rgba(255,255,255,.4)}
.crumb em{font-style:normal;color:#fff}
.cat-hero h1{
  color:#fff;font-size:clamp(30px,4.6vw,48px);line-height:1.2;letter-spacing:-.02em;
  max-width:900px;margin-bottom:18px;
}
.cat-hero-desc{font-size:17px;color:rgba(255,255,255,.86);max-width:680px;line-height:1.8}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 15px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  color:#fff;font-size:13px;font-weight:600;backdrop-filter:blur(4px);
}
.chip b{color:var(--brand-400);font-weight:700}

/* ===== 数据指标条 ===== */
.metrics{
  background:var(--brand-050);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
}
.metric{position:relative;padding-left:18px}
.metric::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--grad-brand);opacity:.75}
.metric .num{font-size:28px;font-weight:800;color:var(--ink-900);letter-spacing:-.01em;line-height:1.25}
.metric .num small{font-size:14px;font-weight:600;color:var(--brand-700);margin-left:4px}
.metric .lab{font-size:13.5px;color:var(--ink-500);margin-top:4px}

/* ===== 筛选 + 卡片 ===== */
.filter-layout{display:grid;grid-template-columns:236px 1fr;gap:28px;align-items:start}
.filter-bar{
  position:sticky;top:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 20px;box-shadow:var(--sh-1);
}
.filter-bar h3{font-size:15px;margin-bottom:14px;color:var(--ink-900)}
.filter-btn{
  display:flex;align-items:center;justify-content:space-between;width:100%;gap:10px;
  min-height:42px;padding:9px 12px;border-radius:12px;font-size:14px;color:var(--ink-700);
  border:1px solid transparent;transition:all .18s ease;text-align:left;
}
.filter-btn:hover{background:var(--brand-050);color:var(--brand-700)}
.filter-btn span{
  font-size:12px;font-weight:700;color:var(--ink-500);background:var(--bg);
  border-radius:var(--r-pill);padding:2px 9px;flex:none;
}
.filter-btn.active{background:var(--brand-050);border-color:rgba(18,165,148,.35);color:var(--brand-700);font-weight:700}
.filter-btn.active span{background:#fff;color:var(--brand-600)}
.filter-note{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:12.8px;color:var(--ink-500);line-height:1.7}

.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.v-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.v-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.v-card.hide{display:none}
.v-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--brand-050)}
.v-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.v-card:hover .v-thumb img{transform:scale(1.03)}
.v-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.tag{
  align-self:flex-start;display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--accent-050);color:var(--accent-600);font-size:12px;font-weight:700;letter-spacing:.2px;
}
.tag.green{background:var(--brand-050);color:var(--brand-700)}
.v-body h3{font-size:18px;line-height:1.45}
.v-body > p{font-size:14.5px;color:var(--ink-500);line-height:1.75}
.v-list{display:flex;flex-direction:column;gap:8px;margin-top:auto;padding-top:14px;border-top:1px dashed var(--line)}
.v-list li{position:relative;padding-left:18px;font-size:13.8px;color:var(--ink-700);line-height:1.65}
.v-list li::before{
  content:"";position:absolute;left:0;top:8px;width:8px;height:8px;border-radius:50%;
  background:var(--brand-500);box-shadow:0 0 0 3px rgba(18,165,148,.14);
}
.empty-tip{
  display:none;text-align:center;padding:60px 20px;background:var(--surface);border:1px dashed var(--line);
  border-radius:var(--r-md);color:var(--ink-500);font-size:14.5px;
}
.empty-tip.show{display:block}

/* ===== 流程时间轴 ===== */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.flow::before{
  content:"";position:absolute;left:26px;right:26px;top:44px;height:0;
  border-top:2px dashed rgba(18,165,148,.35);z-index:0;
}
.flow-step{
  position:relative;z-index:1;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px 22px 26px;box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease;
}
.flow-step:nth-child(even){margin-top:24px}
.flow-step:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.flow-num{
  width:44px;height:44px;border-radius:14px;background:var(--grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;letter-spacing:.5px;
  box-shadow:0 10px 22px rgba(18,165,148,.28);margin-bottom:16px;
}
.flow-step h3{font-size:17px;margin-bottom:10px}
.flow-step p{font-size:14.2px;color:var(--ink-500);line-height:1.75}

/* ===== 场景 7:5 ===== */
.split{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center}
.split.rev{grid-template-columns:5fr 7fr}
.split-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);border:1px solid var(--line);
}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.split-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,143,130,.06),rgba(10,36,33,.22));
}
.float-badge{
  position:absolute;left:18px;bottom:18px;z-index:2;background:#fff;border-radius:16px;padding:14px 18px;
  box-shadow:var(--sh-3);border:1px solid var(--line);min-width:170px;
}
.float-badge .num{font-size:24px;font-weight:800;color:var(--ink-900);line-height:1.2}
.float-badge .num small{font-size:13px;color:var(--brand-700);font-weight:700;margin-left:4px}
.float-badge .lab{font-size:12.5px;color:var(--ink-500);margin-top:2px}
.plain-list{display:flex;flex-direction:column;gap:16px;margin-top:24px}
.plain-list li{display:flex;gap:14px;align-items:flex-start}
.plain-list .idx{
  flex:none;width:28px;height:28px;border-radius:9px;background:var(--brand-050);color:var(--brand-700);
  font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-top:2px;
}
.plain-list h4{font-size:16px;margin-bottom:4px}
.plain-list p{font-size:14.2px;color:var(--ink-500);line-height:1.7}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:14px;
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(46,211,189,.42)}
.faq-item.open{box-shadow:var(--sh-2);border-color:rgba(46,211,189,.5)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  min-height:56px;padding:16px 22px;font-size:16.5px;font-weight:600;color:var(--ink-900);text-align:left;
}
.faq-q .arrow{
  flex:none;width:26px;height:26px;border-radius:50%;background:var(--brand-050);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;
  transition:transform .2s ease,background .2s ease,color .2s ease;
}
.faq-q .arrow svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);background:var(--brand-500);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{
  margin:0 14px 14px;padding:16px 18px;background:var(--brand-050);border-radius:14px;
  font-size:14.8px;color:var(--ink-700);line-height:1.85;
}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);background:var(--dark);color:#fff;
  padding:52px 48px;box-shadow:var(--sh-3);
}
.cta-band::before{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,211,189,.34),rgba(10,36,33,0) 68%);
}
.cta-band::after{
  content:"";position:absolute;left:-100px;bottom:-160px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(242,118,12,.22),rgba(10,36,33,0) 70%);
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center}
.cta-grid h2{color:#fff;font-size:clamp(23px,2.8vw,30px);margin-bottom:16px}
.cta-points{display:flex;flex-direction:column;gap:12px;margin-top:22px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.6px;color:rgba(255,255,255,.82)}
.cta-points li svg{width:18px;height:18px;flex:none;margin-top:3px;stroke:var(--brand-400);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.cta-form{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-md);
  padding:26px;backdrop-filter:blur(6px);
}
.cta-form label{display:block;font-size:13.5px;color:rgba(255,255,255,.78);margin-bottom:8px;font-weight:600}
.cta-form input{
  width:100%;height:48px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.96);padding:0 14px;font-size:14.5px;color:var(--ink-900);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.cta-form input::placeholder{color:var(--ink-300)}
.cta-form input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(46,211,189,.35)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-pill);font-size:15px;font-weight:700;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background .18s ease,color .18s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--grad-cta);color:#fff;box-shadow:0 10px 24px rgba(242,118,12,.3)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(242,118,12,.38)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-ghost:hover{color:#fff;background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--brand-700);border:1.5px solid var(--brand-600)}
.btn-outline:hover{color:var(--brand-600);background:var(--brand-050);transform:translateY(-2px)}
.btn-block{width:100%}
.form-note{
  margin-top:12px;font-size:13px;color:rgba(255,255,255,.68);line-height:1.7;min-height:22px;
}
.form-note.show{color:var(--brand-400);font-weight:600}

/* ===== 页脚 ===== */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);margin-top:88px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16.5px;font-weight:700;color:#fff;letter-spacing:.2px;margin-bottom:14px}
.footer-brand .brand-mark{width:26px;height:26px;border-radius:9px}
.footer-desc{font-size:14.2px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px}
.footer-col h4{font-size:14.5px;color:#fff;margin-bottom:16px;letter-spacing:.3px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:var(--brand-400);text-decoration:none}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  :root{--shell:76px}
  .app-shell{padding:18px 12px 20px;align-items:center}
  .brand{justify-content:center;padding:0}
  .brand-txt{display:none}
  .side-nav{width:100%;align-items:center}
  .side-link{justify-content:center;padding:0;width:48px}
  .side-link .txt{display:none}
  .side-cta{width:48px;height:48px;border-radius:16px;font-size:0}
  .side-cta::after{content:"会";font-size:15px;font-weight:800}
  .side-account{justify-content:center}
  .side-account span:last-child{display:none}
  .wrap,.cat-hero-inner{padding-left:28px;padding-right:28px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow::before{display:none}
  .flow-step:nth-child(even){margin-top:0}
  .cta-grid{grid-template-columns:1fr;gap:30px}
}
@media (max-width:1023px){
  :root{--shell:0px}
  .topbar{display:flex}
  .app-shell{
    width:300px;max-width:84%;transform:translateX(-102%);padding:20px 16px 22px;align-items:stretch;
  }
  .app-shell.open{transform:translateX(0);box-shadow:var(--sh-3)}
  .app-shell .brand{justify-content:flex-start;padding:0 6px}
  .app-shell .brand-txt{display:inline}
  .app-shell .side-nav{align-items:stretch}
  .app-shell .side-link{justify-content:flex-start;padding:0 12px;width:100%}
  .app-shell .side-link .txt{display:inline}
  .app-shell .side-cta{width:100%;height:46px;border-radius:var(--r-pill);font-size:15px}
  .app-shell .side-cta::after{content:none}
  .app-shell .side-account{justify-content:flex-start}
  .app-shell .side-account span:last-child{display:inline}
  .app-main{padding-top:56px}
  .section{padding:64px 0}
  .metrics{grid-template-columns:repeat(2,1fr);padding:26px 22px}
  .filter-layout{grid-template-columns:1fr;gap:20px}
  .filter-bar{position:static;padding:18px}
  .filter-bar .filter-list{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}
  .filter-btn{width:auto;flex:none;border:1px solid var(--line);padding:8px 14px}
  .filter-note{display:none}
  .split,.split.rev{grid-template-columns:1fr;gap:28px}
  .split.rev .split-media{order:-1}
  .cat-hero-inner{padding:52px 28px 56px}
}
@media (max-width:767px){
  .wrap,.cat-hero-inner{padding-left:18px;padding-right:18px}
  .section{padding:48px 0}
  body{font-size:15.5px}
  .card-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .cat-hero-inner{padding:44px 18px 48px}
  .cat-hero-desc{font-size:15.5px}
  .cta-band{padding:34px 22px;border-radius:var(--r-md)}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-desc{max-width:none}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{width:100%}
  .hero-chips .chip{height:32px;font-size:12.4px}
}
@media (max-width:479px){
  .metrics{grid-template-columns:1fr;gap:16px}
  .metric{padding-left:14px}
  .float-badge{padding:11px 14px;min-width:140px}
  .float-badge .num{font-size:20px}
  .faq-q{font-size:15.2px;padding:14px 16px}
  .faq-a-inner{margin:0 10px 12px;padding:14px}
}

/* roulang page: category3 */
:root{
  --brand-700:#0B6E64;
  --brand-600:#0E8F82;
  --brand-500:#12A594;
  --brand-400:#2ED3BD;
  --brand-050:#E8F7F4;
  --accent-600:#E2760C;
  --accent-500:#F59E0B;
  --accent-050:#FFF4E0;
  --ink-900:#12201E;
  --ink-700:#2E4540;
  --ink-500:#5A6B67;
  --ink-300:#93A4A0;
  --line:#E2EDEA;
  --bg:#F5F9F8;
  --surface:#FFFFFF;
  --dark:#0A2421;
  --grad-brand:linear-gradient(135deg,#0E8F82 0%,#19B7A4 48%,#3ED9C0 100%);
  --grad-cta:linear-gradient(120deg,#FF9A3D 0%,#F2760C 100%);
  --sh-1:0 1px 2px rgba(10,36,33,.05);
  --sh-2:0 10px 28px rgba(10,36,33,.10);
  --sh-3:0 18px 48px rgba(10,36,33,.16);
  --r-xl:24px;
  --r-lg:22px;
  --r-md:18px;
  --r-sm:12px;
  --sidebar-w:248px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--bg);
  text-align:justify;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand-500)}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em;text-align:left}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font:inherit}
:focus-visible{outline:3px solid rgba(46,211,189,.45);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 侧栏导航 ---------- */
.side-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  padding:0 16px 20px;
  z-index:60;
  transition:transform .28s ease,width .2s ease;
}
.side-top{height:72px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:28px;height:28px;border-radius:9px;flex:none;
  background:var(--grad-brand);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(14,143,130,.28);
}
.brand-mark span{
  width:10px;height:10px;border-radius:3px;
  background:#fff;
  transform:rotate(45deg);
  display:block;
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.2px;color:var(--ink-900);white-space:nowrap}
.drawer-close{display:none;font-size:22px;line-height:1;color:var(--ink-500);padding:6px 8px}
.side-links{display:flex;flex-direction:column;gap:4px;margin-top:12px;flex:1}
.side-link{
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;
  border-radius:var(--r-sm);
  color:var(--ink-700);
  font-size:15px;
  position:relative;
  transition:background .2s ease,color .2s ease;
}
.side-link .ico{width:20px;height:20px;flex:none;display:inline-flex;align-items:center;justify-content:center}
.side-link .ico svg{
  width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round;
}
.side-link .txt{white-space:nowrap}
.side-link:hover{background:var(--brand-050);color:var(--brand-700);text-decoration:none}
.side-link.active{background:var(--brand-050);color:var(--brand-700);font-weight:600}
.side-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:999px;
  background:var(--grad-brand);
}
.side-foot{margin-top:16px;display:flex;flex-direction:column;gap:12px}
.account-state{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-500);
  padding:10px 12px;border:1px dashed var(--line);border-radius:var(--r-sm);
}
.account-state .dot{width:8px;height:8px;border-radius:50%;background:var(--ink-300);flex:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:999px;
  font-size:15px;font-weight:600;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0);filter:brightness(.96)}
.btn-cta{background:var(--grad-cta);color:#fff;box-shadow:0 6px 18px rgba(226,118,12,.28)}
.btn-cta:hover{color:#fff;box-shadow:0 12px 26px rgba(226,118,12,.34)}
.btn-line{background:#fff;border:1.5px solid var(--brand-600);color:var(--brand-700)}
.btn-line:hover{background:var(--brand-050);color:var(--brand-700)}
.btn-ghost{color:var(--brand-700);background:transparent;border:none;height:44px;padding:0 16px}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-700)}
.btn-block{width:100%}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 32px}

/* ---------- 移动顶栏 ---------- */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  align-items:center;gap:12px;padding:0 18px;
}
.topbar.scrolled{box-shadow:0 2px 12px rgba(10,36,33,.08)}
.burger{width:40px;height:40px;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:0 8px}
.burger span{display:block;height:2px;border-radius:2px;background:var(--ink-700)}
.topbar .brand-text{font-size:15px}
.topbar .spacer{flex:1}
.mask{
  position:fixed;inset:0;background:rgba(10,36,33,.45);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:80;
}
.mask.show{opacity:1;visibility:visible}
body.no-scroll{overflow:hidden}

/* ---------- 主区域 ---------- */
.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.section{padding:88px 0}
.section.tight{padding:64px 0}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center h2,.sec-head.center p{text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;
  color:var(--brand-700);background:var(--brand-050);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-500)}
h2{font-size:clamp(24px,3vw,34px)}
.sec-head p{margin-top:14px;color:var(--ink-500);font-size:16px}
.lead{color:var(--ink-700);font-size:17px;line-height:1.85}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;background:var(--dark);
  padding:72px 0 64px;
}
.hero-media{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.34;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(10,36,33,.94) 0%,rgba(10,36,33,.80) 44%,rgba(14,143,130,.58) 100%);
}
.hero-inner{position:relative;z-index:2}
.crumb{font-size:14px;color:rgba(255,255,255,.66);margin-bottom:20px}
.crumb a{color:rgba(255,255,255,.82)}
.crumb a:hover{color:#fff}
.crumb .sep{margin:0 8px;opacity:.6}
.hero h1{
  color:#fff;
  font-size:clamp(30px,4.6vw,48px);
  line-height:1.2;
  letter-spacing:-.02em;
  max-width:900px;
}
.hero-sub{
  color:rgba(255,255,255,.82);
  font-size:17px;line-height:1.8;
  max-width:660px;margin-top:18px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-actions .btn-line{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.hero-actions .btn-line:hover{background:rgba(255,255,255,.12);color:#fff}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;
  margin-top:44px;max-width:900px;
}
.stat{
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--r-md);
  padding:18px 20px;
  backdrop-filter:blur(6px);
}
.stat b{display:block;font-size:26px;font-weight:700;color:#fff;line-height:1.2}
.stat b span{font-size:13px;font-weight:600;margin-left:4px;color:rgba(255,255,255,.75)}
.stat em{display:block;font-style:normal;font-size:13px;color:rgba(255,255,255,.72);margin-top:6px}

/* ---------- 数据条 ---------- */
.metrics{
  background:var(--brand-050);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:32px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.metric{border-left:2px solid rgba(18,165,148,.28);padding-left:18px}
.metric:first-child{border-left:none;padding-left:0}
.metric b{display:block;font-size:28px;font-weight:700;color:var(--ink-900);letter-spacing:-.02em;line-height:1.2}
.metric b span{font-size:13px;font-weight:600;color:var(--ink-500);margin-left:4px}
.metric em{display:block;font-style:normal;font-size:13.5px;color:var(--ink-500);margin-top:8px}

/* ---------- 时间线 ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:19px;top:12px;bottom:12px;width:2px;
  background:repeating-linear-gradient(180deg,rgba(18,165,148,.45) 0 8px,transparent 8px 16px);
}
.tl-item{position:relative;padding-left:64px;margin-bottom:28px}
.tl-item:last-child{margin-bottom:0}
.tl-dot{
  position:absolute;left:8px;top:26px;
  width:24px;height:24px;border-radius:50%;
  background:#fff;border:2px solid var(--brand-400);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 6px rgba(46,211,189,.12);
}
.tl-dot i{width:8px;height:8px;border-radius:50%;background:var(--grad-brand);display:block}
.tl-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:28px 32px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tl-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.42)}
.tl-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:14px}
.chip{
  display:inline-flex;align-items:center;
  font-size:12.5px;font-weight:600;
  color:var(--brand-700);background:var(--brand-050);
  padding:5px 12px;border-radius:999px;
}
.chip.accent{color:var(--accent-600);background:var(--accent-050)}
.badge-num{
  display:inline-flex;align-items:center;
  font-size:14px;font-weight:700;color:#fff;
  background:var(--grad-brand);
  padding:6px 14px;border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.badge-num.amber{background:var(--grad-cta)}
.tl-card h3{font-size:20px;margin-bottom:10px}
.tl-card p{color:var(--ink-500);font-size:15.5px}
.ticks{margin-top:16px;display:grid;gap:10px}
.ticks li{
  position:relative;padding-left:26px;
  font-size:15px;color:var(--ink-700);
}
.ticks li::before{
  content:"";position:absolute;left:8px;top:10px;
  width:8px;height:8px;border-radius:50%;background:var(--brand-500);
}
.tl-foot{margin-top:20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.tl-note{font-size:13.5px;color:var(--ink-300)}

/* ---------- 非对称栅格 ---------- */
.grid-8-4{display:grid;grid-template-columns:8fr 4fr;gap:24px;align-items:stretch}
.grid-7-5{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:center}
.grid-5-7{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:center}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:32px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.42)}
.card h3{font-size:20px;margin-bottom:12px}
.card p{color:var(--ink-500);font-size:15.5px}
.card-plain{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px}
.media-card{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-1);background:var(--surface);
}
.media-card img{width:100%;height:100%;min-height:280px;object-fit:cover;transition:transform .35s ease}
.media-card:hover img{transform:scale(1.03)}
.card-cover{
  border-radius:var(--r-md);overflow:hidden;margin-bottom:18px;
  border:1px solid var(--line);
}
.card-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease}
.card:hover .card-cover img{transform:scale(1.03)}
.split-list{display:grid;gap:16px;margin-top:6px}
.split-list li{
  display:grid;grid-template-columns:36px 1fr;gap:14px;align-items:start;
  padding:14px 0;border-bottom:1px dashed var(--line);
}
.split-list li:last-child{border-bottom:none}
.split-list .idx{
  width:36px;height:36px;border-radius:12px;
  background:var(--brand-050);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
}
.split-list h4{font-size:17px;margin-bottom:6px}
.split-list p{font-size:14.5px;color:var(--ink-500)}

/* ---------- 流程 ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
  position:relative;
}
.step{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:26px 24px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:nth-child(even){margin-top:24px}
.step:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.42)}
.step .badge-num{margin-bottom:16px}
.step h4{font-size:17px;margin-bottom:8px}
.step p{font-size:14.5px;color:var(--ink-500)}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.open{border-color:rgba(46,211,189,.5);box-shadow:var(--sh-2)}
.faq-q{
  width:100%;min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 24px;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-q:hover{color:var(--brand-700)}
.faq-q .arrow{
  width:20px;height:20px;flex:none;color:var(--brand-600);
  transition:transform .2s ease;
}
.faq-q .arrow svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:360px}
.faq-a-inner{
  background:var(--brand-050);
  margin:0 12px 12px;padding:16px 20px;border-radius:14px;
  font-size:15px;color:var(--ink-700);line-height:1.8;
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--dark);
  border-radius:var(--r-xl);
  padding:56px;
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;width:520px;height:520px;right:-160px;top:-200px;
  background:radial-gradient(circle,rgba(46,211,189,.48) 0%,rgba(46,211,189,0) 68%);
}
.cta-band::after{
  content:"";position:absolute;width:420px;height:420px;left:-180px;bottom:-220px;
  background:radial-gradient(circle,rgba(242,118,12,.30) 0%,rgba(242,118,12,0) 70%);
}
.cta-left,.cta-right{position:relative;z-index:2}
.cta-left h2{color:#fff;font-size:clamp(24px,3vw,32px)}
.cta-left ul{margin-top:22px;display:grid;gap:12px}
.cta-left li{position:relative;padding-left:26px;color:rgba(255,255,255,.82);font-size:15.5px}
.cta-left li::before{
  content:"";position:absolute;left:6px;top:10px;width:8px;height:8px;border-radius:50%;
  background:var(--brand-400);
}
.form-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-lg);
  padding:28px;
  backdrop-filter:blur(8px);
}
.form-card label{display:block;font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:8px}
.form-card input{
  width:100%;height:48px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.94);
  color:var(--ink-900);margin-bottom:16px;
}
.form-card input::placeholder{color:var(--ink-300)}
.form-card input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 4px rgba(46,211,189,.30)}
.form-hint{margin-top:14px;font-size:13px;color:rgba(255,255,255,.62)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--dark);color:rgba(255,255,255,.72);
  padding:64px 0 28px;margin-top:auto;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-size:16px;font-weight:700;color:#fff;letter-spacing:.2px;margin-bottom:16px;
}
.footer-desc{font-size:14.5px;line-height:1.8;max-width:320px;color:rgba(255,255,255,.62)}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px}
.footer-col ul{display:grid;gap:12px}
.footer-col a{color:rgba(255,255,255,.66);font-size:14.5px}
.footer-col a:hover{color:var(--brand-400)}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.5);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sidebar-w:76px}
  .side-nav{padding:0 12px 20px}
  .side-top{justify-content:center}
  .brand-text{display:none}
  .side-link{justify-content:center;padding:0}
  .side-link .txt{
    position:absolute;left:calc(100% + 12px);top:50%;transform:translateY(-50%);
    background:var(--ink-900);color:#fff;font-size:13px;
    padding:6px 12px;border-radius:8px;white-space:nowrap;
    opacity:0;visibility:hidden;transition:opacity .18s ease,visibility .18s ease;
    z-index:5;
  }
  .side-link:hover .txt{opacity:1;visibility:visible}
  .side-foot .btn{padding:0;font-size:0}
  .side-foot .btn::after{content:"开通";font-size:13px}
  .side-foot .account-state{display:none}
  .grid-8-4,.grid-7-5,.grid-5-7{grid-template-columns:1fr;gap:24px}
  .media-card img{min-height:220px;max-height:320px}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .main{margin-left:0;padding-top:56px}
  .side-nav{
    width:84%;max-width:320px;
    transform:translateX(-100%);
    box-shadow:var(--sh-3);
    padding:0 16px 24px;
  }
  .side-nav.open{transform:translateX(0)}
  .side-nav .brand-text{display:inline}
  .side-top{justify-content:space-between}
  .side-link{justify-content:flex-start;padding:0 12px}
  .side-link .txt{position:static;transform:none;background:none;color:inherit;opacity:1;visibility:visible;padding:0;font-size:15px}
  .side-foot .btn{padding:0 28px;font-size:15px}
  .side-foot .btn::after{content:""}
  .side-foot .account-state{display:flex}
  .drawer-close{display:block}
  .section{padding:64px 0}
  .cta-band{grid-template-columns:1fr;padding:40px 32px}
  .hero{padding:56px 0 48px}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr));padding:28px 24px}
  .metric:nth-child(3){border-left:none;padding-left:0}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step:nth-child(even){margin-top:16px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:48px 0}
  .tl-item{padding-left:48px}
  .timeline::before{left:13px}
  .tl-dot{left:2px;top:22px;width:22px;height:22px}
  .tl-card{padding:24px 20px}
  .card,.card-plain{padding:24px 20px}
  .hero{padding:44px 0 40px}
  .hero-actions .btn{width:100%}
  .cta-band{padding:32px 22px;border-radius:var(--r-lg)}
  .faq-q{font-size:15px;padding:14px 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:519px){
  .hero-stats,.metrics,.steps{grid-template-columns:1fr}
  .metric{border-left:none;padding-left:0}
  .step:nth-child(even){margin-top:0}
  .tl-item{padding-left:38px}
  .timeline::before{left:10px}
  .tl-dot{left:0;width:20px;height:20px}
  .tl-top{flex-direction:column;align-items:flex-start;gap:10px}
}

/* roulang page: category4 */
*,*::before,*::after{box-sizing:border-box}
:root{
  --brand-500:#12A594;
  --brand-600:#0E8F82;
  --brand-400:#2ED3BD;
  --brand-050:#E8F7F4;
  --accent-500:#F59E0B;
  --accent-600:#E2760C;
  --accent-050:#FFF4E0;
  --ink-900:#12201E;
  --ink-700:#2E4540;
  --ink-500:#5A6B67;
  --ink-300:#93A4A0;
  --line:#E2EDEA;
  --bg:#F5F9F8;
  --surface:#FFFFFF;
  --dark:#0A2421;
  --grad-brand:linear-gradient(135deg,#0E8F82 0%,#19B7A4 48%,#3ED9C0 100%);
  --grad-cta:linear-gradient(120deg,#FF9A3D 0%,#F2760C 100%);
  --r-xl:26px;
  --r-lg:22px;
  --r-md:18px;
  --r-sm:12px;
  --sh-1:0 1px 2px rgba(10,36,33,.05);
  --sh-2:0 10px 28px rgba(10,36,33,.10);
  --sh-3:0 18px 48px rgba(10,36,33,.16);
  --side-w:248px;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--bg);
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-500);text-decoration:underline}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--brand-400);outline-offset:2px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--surface);color:var(--brand-600);padding:10px 16px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0}
.num{font-variant-numeric:tabular-nums}

/* ---------- 布局骨架 ---------- */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:56px;
  align-items:center;
  gap:12px;
  padding:0 14px;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  z-index:80;
  transition:box-shadow .2s ease;
}
.topbar.scrolled{box-shadow:0 2px 12px rgba(10,36,33,.08)}
.topbar-brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink-900);letter-spacing:.2px;flex:1;min-width:0}
.topbar-brand span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.burger{width:38px;height:38px;border-radius:10px;display:grid;place-content:center;gap:4px;background:var(--brand-050);flex:0 0 38px}
.burger span{display:block;width:17px;height:2px;border-radius:2px;background:var(--brand-600)}
.burger span+span{margin-top:4px}

.shell{display:flex;min-height:100vh}
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  padding:0 16px 20px;
  z-index:70;
  transition:transform .26s ease,width .26s ease;
}
.brand{display:flex;align-items:center;gap:10px;height:72px;padding:0 8px;font-size:16px;font-weight:700;letter-spacing:.2px;color:var(--ink-900)}
.brand:hover{text-decoration:none;color:var(--ink-900)}
.brand-mark{
  width:28px;height:28px;border-radius:9px;flex:0 0 28px;
  background:var(--grad-brand);
  display:grid;place-items:center;
  box-shadow:0 4px 12px rgba(18,165,148,.35);
}
.brand-mark span{width:11px;height:11px;border:2px solid #fff;border-radius:3px;transform:rotate(45deg)}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:10px}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;
  border-radius:12px;
  color:var(--ink-700);
  font-size:15px;
  transition:background .18s ease,color .18s ease;
}
.side-link:hover{background:var(--brand-050);color:var(--brand-600);text-decoration:none}
.side-link .ico{width:20px;height:20px;display:grid;place-items:center;flex:0 0 20px;color:var(--ink-500);transition:color .18s ease}
.side-link:hover .ico{color:var(--brand-600)}
.side-link .ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.side-link .txt{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-link.active{background:var(--brand-050);color:var(--brand-600);font-weight:600}
.side-link.active .ico{color:var(--brand-600)}
.side-link.active::before{content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;border-radius:3px;background:var(--grad-brand)}
.side-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px}
.account-state{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-500);padding:0 6px}
.account-state .dot{width:8px;height:8px;border-radius:50%;background:var(--accent-500);box-shadow:0 0 0 3px var(--accent-050);flex:0 0 8px}
.side-foot .label{white-space:nowrap}
.scrim{display:none;position:fixed;inset:0;background:rgba(10,36,33,.45);z-index:65;opacity:0;transition:opacity .2s ease}
.scrim.show{display:block;opacity:1}

.main{margin-left:var(--side-w);min-height:100vh;width:calc(100% - var(--side-w))}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:999px;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,filter .18s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0);filter:brightness(.96)}
.btn-cta{background:var(--grad-cta);color:#fff;box-shadow:0 8px 20px rgba(242,118,12,.28)}
.btn-cta:hover{color:#fff;box-shadow:0 12px 26px rgba(242,118,12,.34)}
.btn-outline{background:#fff;border:1.5px solid var(--brand-600);color:var(--brand-600)}
.btn-outline:hover{background:var(--brand-050);color:var(--brand-600)}
.btn-ghost{background:rgba(255,255,255,.10);border:1.5px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff}
.btn-block{width:100%}
.btn-xs{height:38px;padding:0 16px;font-size:13.5px}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.link-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14.5px}
.link-more svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s ease}
.link-more:hover svg{transform:translateX(3px)}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--brand-050);color:var(--brand-600);font-size:12.5px;font-weight:600;letter-spacing:.2px}
.tag-accent{background:var(--accent-050);color:var(--accent-600)}
.tag-dark{background:rgba(255,255,255,.16);color:#fff;backdrop-filter:blur(2px)}

/* ---------- 首屏 ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  color:#fff;
  background:#0A2421 url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-radius:0 0 28px 28px;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,36,33,.78) 0%,rgba(10,36,33,.55) 60%,rgba(10,36,33,.68) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:60px}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72)}
.crumb a{color:rgba(255,255,255,.8)}
.crumb a:hover{color:#fff}
.crumb span[aria-current]{color:#fff}
.page-hero h1{
  margin-top:20px;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:700;
  max-width:900px;
}
.hero-sub{margin-top:16px;font-size:17px;line-height:1.75;color:rgba(255,255,255,.86);max-width:660px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;
  border-radius:999px;font-size:14px;font-weight:500;
  color:#fff;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.28);
  transition:background .18s ease,transform .18s ease;
}
.chip:hover{background:rgba(46,211,189,.28);color:#fff;text-decoration:none;transform:translateY(-2px)}

/* ---------- 板块 ---------- */
.section{padding:88px 0}
.section-tight{padding:56px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-600);letter-spacing:.6px;margin-bottom:12px}
.section-eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--grad-brand)}
.section-title{font-size:clamp(24px,3vw,34px);line-height:1.3;letter-spacing:-.01em;font-weight:700}
.section-desc{margin-top:14px;color:var(--ink-500);font-size:16px;line-height:1.8}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}

/* ---------- 图文交错 ---------- */
.zig-list{display:flex;flex-direction:column;gap:28px}
.zig{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:40px;
  align-items:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:32px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.zig:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.zig.flip{grid-template-columns:minmax(0,1fr) minmax(0,1.35fr)}
.zig.flip .zig-text{order:2}
.zig.flip .zig-media{order:1}
.zig-media{position:relative;border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1)}
.zig-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease}
.zig:hover .zig-media img{transform:scale(1.03)}
.zig-media .media-badge{
  position:absolute;right:14px;bottom:14px;
  background:rgba(255,255,255,.94);
  border-radius:14px;
  padding:8px 14px;
  display:flex;align-items:baseline;gap:6px;
  box-shadow:var(--sh-2);
}
.media-badge strong{font-size:19px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums}
.media-badge em{font-style:normal;font-size:12.5px;color:var(--ink-500)}
.zig-text h3{font-size:21px;line-height:1.4;margin-top:12px;font-weight:700}
.zig-text p{margin-top:12px;color:var(--ink-500);font-size:15.5px;line-height:1.8}
.point-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.point-list li{position:relative;padding-left:24px;font-size:15px;color:var(--ink-700)}
.point-list li::before{content:"";position:absolute;left:2px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 3px var(--brand-050)}
.zig-text .link-more{margin-top:20px}

/* ---------- 指标条 ---------- */
.metric-band{
  background:var(--brand-050);
  border:1px solid rgba(18,165,148,.16);
  border-radius:var(--r-lg);
  padding:30px 32px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.metric{display:flex;flex-direction:column;gap:4px}
.metric strong{font-size:28px;font-weight:700;color:var(--brand-600);line-height:1.1;font-variant-numeric:tabular-nums}
.metric span{font-size:14.5px;font-weight:600;color:var(--ink-700)}
.metric em{font-style:normal;font-size:12.5px;color:var(--ink-500)}

/* ---------- 步骤时间线 ---------- */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.steps::before{content:"";position:absolute;left:12px;right:12px;top:26px;border-top:2px dashed rgba(18,165,148,.35);z-index:0}
.step{
  position:relative;z-index:1;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.step:nth-child(even){margin-top:24px}
.step:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.step .num-badge{
  width:44px;height:44px;border-radius:14px;
  background:var(--grad-brand);
  color:#fff;font-weight:700;font-size:15px;
  display:grid;place-items:center;
  font-variant-numeric:tabular-nums;
  box-shadow:0 6px 16px rgba(18,165,148,.3);
}
.step h3{margin-top:16px;font-size:17px;font-weight:700;line-height:1.4}
.step p{margin-top:10px;font-size:14.5px;color:var(--ink-500);line-height:1.8}

/* ---------- 协助区块（非对称） ---------- */
.assist-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;align-items:stretch}
.assist-main{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;
}
.assist-main:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.assist-main img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.assist-main:hover img{transform:scale(1.03)}
.assist-body{padding:28px 32px 32px}
.assist-body h3{font-size:21px;font-weight:700;margin-top:12px;line-height:1.4}
.assist-body p{margin-top:12px;color:var(--ink-500);font-size:15.5px;line-height:1.8}
.assist-side{display:flex;flex-direction:column;gap:24px}
.mini-card{
  flex:1;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(46,211,189,.4)}
.mini-card h4{font-size:17px;font-weight:700;margin-top:12px}
.mini-card p{margin-top:10px;font-size:14.5px;color:var(--ink-500);line-height:1.8}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:rgba(46,211,189,.5);box-shadow:var(--sh-2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 22px;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink-900);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--brand-600)}
.faq-q .chev{flex:0 0 22px;width:22px;height:22px;color:var(--brand-600);transition:transform .2s ease}
.faq-q .chev svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.faq-item.open .faq-q .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:560px}
.faq-a-inner{
  margin:0 14px 14px;
  padding:18px 20px;
  background:var(--brand-050);
  border-radius:14px;
  font-size:15px;line-height:1.85;color:var(--ink-700);
  text-align:justify;
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--dark);
  border-radius:var(--r-xl);
  padding:52px;
  color:#fff;
  display:grid;grid-template-columns:1.15fr 1fr;gap:44px;
  align-items:center;
}
.cta-band::before{
  content:"";position:absolute;width:560px;height:560px;right:-160px;top:-260px;
  background:radial-gradient(circle,rgba(46,211,189,.4) 0%,rgba(46,211,189,0) 65%);
  pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;width:380px;height:380px;left:-140px;bottom:-220px;
  background:radial-gradient(circle,rgba(242,118,12,.28) 0%,rgba(242,118,12,0) 65%);
  pointer-events:none;
}
.cta-band>*{position:relative;z-index:2}
.cta-band h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;letter-spacing:-.01em;font-weight:700}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.78);font-size:15.5px;line-height:1.8}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px}
.cta-points li{position:relative;padding-left:24px;font-size:14.5px;color:rgba(255,255,255,.86)}
.cta-points li::before{content:"";position:absolute;left:2px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--brand-400);box-shadow:0 0 0 3px rgba(46,211,189,.2)}
.cta-form{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-md);padding:26px}
.cta-form label{display:block;font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:8px}
.cta-form input{
  width:100%;height:48px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.96);
  color:var(--ink-900);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.cta-form input::placeholder{color:var(--ink-300)}
.cta-form input:focus{border-color:var(--brand-500);box-shadow:0 0 0 4px rgba(46,211,189,.28);outline:none}
.cta-form .btn{width:100%;margin-top:16px}
.form-note{margin-top:12px;font-size:12.5px;color:rgba(255,255,255,.6);line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);margin-top:88px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#fff;letter-spacing:.2px}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:320px}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:var(--brand-400);text-decoration:none}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.52);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .sidebar{width:76px;padding:0 12px 20px;align-items:center}
  .brand{justify-content:center;padding:0}
  .brand .brand-text{display:none}
  .side-nav{width:100%}
  .side-link{justify-content:center;padding:0;gap:0}
  .side-link .txt{display:none}
  .side-link.active::before{top:9px;bottom:9px}
  .side-foot{align-items:center;width:100%}
  .side-foot .label{display:none}
  .side-foot .btn{padding:0 16px}
  .account-state{justify-content:center}
  .account-state span:last-child{display:none}
  .main{margin-left:76px;width:calc(100% - 76px)}
  .container{padding:0 28px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps::before{display:none}
  .step:nth-child(even){margin-top:0}
  .metric-band{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .sidebar{transform:translateX(-100%);width:84%;max-width:320px;padding:0 16px 20px;align-items:stretch}
  .sidebar.open{transform:translateX(0);box-shadow:var(--sh-3)}
  .brand{justify-content:flex-start;padding:0 8px}
  .brand .brand-text{display:inline}
  .side-link{justify-content:flex-start;padding:0 12px;gap:12px}
  .side-link .txt{display:inline}
  .side-foot{align-items:stretch}
  .side-foot .label{display:inline}
  .account-state{justify-content:flex-start}
  .account-state span:last-child{display:inline}
  .main{margin-left:0;width:100%;padding-top:56px}
  .zig,.zig.flip{grid-template-columns:minmax(0,1fr);gap:28px}
  .zig.flip .zig-text{order:0}
  .zig.flip .zig-media{order:0}
  .assist-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:40px;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:48px 0}
  .section-tight{padding:36px 0}
  .section-head{margin-bottom:28px}
  .page-hero .container{padding-top:36px;padding-bottom:40px}
  .page-hero h1{font-size:26px}
  .hero-sub{font-size:15.5px}
  .zig{padding:20px;border-radius:var(--r-md)}
  .zig-text h3{font-size:19px}
  .steps{grid-template-columns:minmax(0,1fr);gap:16px}
  .metric-band{grid-template-columns:minmax(0,1fr) minmax(0,1fr);padding:22px;gap:18px}
  .metric strong{font-size:24px}
  .assist-body{padding:22px}
  .cta-band{padding:28px 22px;border-radius:var(--r-lg)}
  .cta-form{padding:20px}
  .btn{width:100%;padding:0 20px}
  .btn-xs{width:auto;padding:0 14px}
  .chip{width:100%;justify-content:center}
  .faq-q{font-size:15.5px;padding:14px 18px}
  .faq-a-inner{margin:0 10px 12px;padding:16px}
  .site-footer{padding:44px 0 24px;margin-top:56px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:480px){
  body{font-size:15px}
  .page-hero h1{font-size:23px}
  .section-title{font-size:22px}
  .zig-text p,.assist-body p{font-size:14.5px}
  .metric-band{padding:18px}
  .media-badge{padding:6px 10px}
  .media-badge strong{font-size:16px}
}