/* roulang page: index */
:root{
  --c-primary:#17539B;
  --c-primary-700:#103E76;
  --c-primary-50:#EAF1FA;
  --c-accent:#D9822B;
  --c-accent-700:#B96A1F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF2;
  --c-text:#1C2530;
  --c-text-2:#4A5568;
  --c-text-3:#7C8794;
  --c-success:#0E8C6E;
  --c-error:#C0392B;
  --r-card:10px;
  --r-btn:8px;
  --r-input:8px;
  --r-img:12px;
  --sh-card:0 8px 24px rgba(23,83,155,.08);
  --sh-card-hover:0 14px 32px rgba(23,83,155,.14);
  --sh-nav:0 2px 12px rgba(23,83,155,.06);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  font-family:var(--font-cn);
  font-size:16px;line-height:1.88;
  color:var(--c-text);background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,background-color .2s ease;}
a:hover{color:var(--c-accent);text-decoration:underline;}
a:focus-visible{outline:2px solid rgba(23,83,155,.4);outline-offset:2px;border-radius:4px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure{margin:0;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
[hidden]{display:none !important;}

/* ---------- 容器与板块 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-white{background:var(--c-surface);}
.band-blue{background:var(--c-primary-50);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head h2{font-size:30px;line-height:1.35;font-weight:600;color:var(--c-text);letter-spacing:0;}
.section-head p{margin-top:12px;font-size:16px;color:var(--c-text-2);}
.head-bar{padding-left:18px;border-left:3px solid var(--c-primary);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-primary);letter-spacing:.06em;margin-bottom:14px;}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--c-accent);border-radius:1px;}
.split{display:grid;gap:48px;align-items:start;}
.split-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center;}
.split-4-8{grid-template-columns:minmax(0,4fr) minmax(0,8fr);}
.split-5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}
.split-2-1{grid-template-columns:minmax(0,2fr) minmax(0,1fr);}
.sticky-col{position:sticky;top:100px;}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--c-primary-700);color:#fff;font-size:13px;height:38px;display:flex;align-items:center;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;}
.topbar-domain{color:rgba(255,255,255,.78);letter-spacing:.03em;}
.topbar-note{color:rgba(255,255,255,.95);}
.topbar-actions{display:flex;align-items:center;gap:12px;}
.topbar-actions a{color:#fff;font-size:13px;}
.topbar-actions a:hover{color:#fff;text-decoration:underline;}
.topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.28);}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-surface);border-bottom:1px solid var(--c-border);transition:box-shadow .25s ease;}
.site-header.is-stuck{box-shadow:var(--sh-nav);}
.nav-wrap{height:70px;display:flex;align-items:center;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand-mark{position:relative;flex:0 0 auto;width:28px;height:28px;border-radius:7px;background:var(--c-primary);}
.brand-mark::before{content:"";position:absolute;left:6px;top:6px;width:9px;height:9px;border:2px solid rgba(255,255,255,.85);border-radius:2px;}
.brand-mark::after{content:"";position:absolute;right:6px;bottom:6px;width:7px;height:7px;border-radius:2px;background:#fff;opacity:.9;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:20px;font-weight:600;color:var(--c-primary);letter-spacing:.01em;}
.brand-sub{font-size:12px;color:var(--c-text-3);margin-top:3px;}
.nav-panel{display:flex;align-items:center;gap:20px;margin-left:auto;}
.nav-menu{display:flex;align-items:center;gap:2px;}
.nav-menu a{position:relative;display:inline-flex;align-items:center;height:42px;padding:0 14px;font-size:15px;color:var(--c-text-2);border-radius:6px;}
.nav-menu a:hover{color:var(--c-primary);background:var(--c-primary-50);text-decoration:none;}
.nav-menu a.is-active{color:var(--c-primary);font-weight:600;}
.nav-menu a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:-14px;height:2px;border-radius:2px;background:var(--c-primary);}
.nav-cta{margin-left:6px;}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--c-border);border-radius:8px;background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:4px;padding:0;}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:1px;background:var(--c-primary);transition:transform .22s ease,opacity .22s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--r-btn);border:1px solid transparent;font-size:15px;font-weight:600;line-height:1;white-space:nowrap;transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn-primary{background:var(--c-accent);border-color:var(--c-accent);color:#fff;}
.btn-primary:hover{background:var(--c-accent-700);border-color:var(--c-accent-700);color:#fff;box-shadow:0 10px 22px rgba(217,130,43,.24);}
.btn-secondary{background:#fff;border-color:var(--c-primary);color:var(--c-primary);}
.btn-secondary:hover{background:var(--c-primary-50);color:var(--c-primary);}
.btn-solid{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.btn-solid:hover{background:var(--c-primary-700);border-color:var(--c-primary-700);color:#fff;}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);}
.link-arrow::after{content:"→";transition:transform .2s ease;}
.link-arrow:hover{color:var(--c-accent);text-decoration:none;}
.link-arrow:hover::after{transform:translateX(3px);}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:var(--c-primary-50);color:var(--c-primary);font-size:12px;font-weight:500;line-height:1;}
.badge-accent{background:rgba(217,130,43,.12);color:var(--c-accent-700);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{display:inline-flex;align-items:center;height:28px;padding:0 12px;border:1px solid var(--c-border);border-radius:999px;background:#fff;font-size:13px;color:var(--c-text-2);}

/* ---------- Hero ---------- */
.hero{background:var(--c-surface);border-bottom:1px solid var(--c-border);padding:76px 0 88px;position:relative;overflow:hidden;}
.hero::before{content:"";position:absolute;top:-80px;right:-140px;width:420px;height:420px;background:var(--c-primary-50);transform:skewX(-14deg);opacity:.75;border-radius:40px;pointer-events:none;}
.hero-inner{position:relative;z-index:1;}
.hero h1{font-size:40px;line-height:1.3;font-weight:600;color:var(--c-text);letter-spacing:0;}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--c-text-2);max-width:520px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-trust{margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:14px;color:var(--c-text-3);}
.hero-trust li{display:inline-flex;align-items:center;gap:8px;}
.hero-trust li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent);}
.hero-media{position:relative;}
.hero-media::before{content:"";position:absolute;left:-7%;bottom:-9%;width:58%;height:52%;background:var(--c-primary-50);opacity:.9;transform:skewX(-12deg);border-radius:16px;z-index:0;}
.ratio{position:relative;overflow:hidden;border-radius:var(--r-img);background:var(--c-primary-50);}
.ratio > img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease;}
.ratio-4-3{aspect-ratio:4 / 3;}
.ratio-16-10{aspect-ratio:16 / 10;}
.ratio-3-2{aspect-ratio:3 / 2;}
.hero-media .ratio{position:relative;z-index:1;box-shadow:var(--sh-card);}

/* ---------- 服务板块 ---------- */
.service-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:44px;}
.service-item{display:flex;align-items:flex-start;gap:16px;padding:26px 0;border-top:1px solid var(--c-border);}
.service-item:last-child{border-bottom:1px solid var(--c-border);}
.service-num{flex:0 0 auto;width:34px;height:34px;border-radius:8px;background:var(--c-primary-50);color:var(--c-primary);font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;}
.service-body h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--c-text);}
.service-body p{margin-top:8px;font-size:14px;line-height:1.85;color:var(--c-text-2);}
.service-more{margin-top:22px;}

/* ---------- 数据条 ---------- */
.stats{padding:48px 0;background:var(--c-primary-50);}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));}
.stat{padding:6px 20px;text-align:center;border-left:1px solid #D3E1F2;}
.stat:first-child{border-left:0;}
.stat-num{font-size:40px;line-height:1.1;font-weight:600;color:var(--c-primary);font-variant-numeric:tabular-nums;}
.stat-label{margin-top:10px;font-size:14px;color:var(--c-text-3);}

/* ---------- 卡片 ---------- */
.card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease;}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);}
.card:hover .ratio > img{transform:scale(1.03);}
.card-body{padding:24px;}
.card-body h3{font-size:20px;line-height:1.5;font-weight:600;color:var(--c-text);}
.card-body p{margin-top:10px;font-size:15px;color:var(--c-text-2);}
.card-link{display:block;color:inherit;}
.card-link:hover{text-decoration:none;}
.card-link:hover h3{color:var(--c-primary);}

/* ---------- 案例区 ---------- */
.case-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:24px;align-items:stretch;}
.case-side{display:grid;grid-template-rows:1fr 1fr;gap:24px;}
.case-mini{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:24px;display:flex;flex-direction:column;justify-content:space-between;transition:transform .25s ease,box-shadow .25s ease;}
.case-mini:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);}
.case-mini h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--c-text);}
.case-mini p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--c-text-2);}
.case-mini .link-arrow{margin-top:16px;font-size:14px;}
.case-main .card-body h3{font-size:22px;}
.case-meta{margin-top:16px;display:flex;align-items:center;gap:12px;font-size:13px;color:var(--c-text-3);}

/* ---------- 方案步骤 ---------- */
.step-list{border-top:1px solid var(--c-border);}
.step{display:flex;gap:22px;padding:26px 0;border-bottom:1px solid var(--c-border);}
.step-num{flex:0 0 auto;width:38px;height:38px;border-radius:8px;background:var(--c-primary);color:#fff;font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;}
.step-body h3{font-size:18px;font-weight:600;line-height:1.5;color:var(--c-text);}
.step-body p{margin-top:8px;font-size:15px;color:var(--c-text-2);}
.step-body ul{margin-top:12px;}
.step-body ul li{position:relative;padding-left:18px;font-size:14px;color:var(--c-text-2);line-height:1.9;}
.step-body ul li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:2px;background:var(--c-accent);}
.plan-figure{margin-top:32px;}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:start;}
.lead-card{display:block;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease;}
.lead-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);text-decoration:none;}
.lead-card:hover .ratio > img{transform:scale(1.03);}
.lead-card:hover h3{color:var(--c-primary);}
.lead-body{padding:24px;}
.lead-body h3{margin-top:12px;font-size:21px;line-height:1.5;font-weight:600;color:var(--c-text);}
.lead-body p{margin-top:10px;font-size:15px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-list{border-top:1px solid var(--c-border);}
.news-row{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:20px 0;border-bottom:1px solid var(--c-border);text-decoration:none;}
.news-row:hover{text-decoration:none;}
.news-row-main{min-width:0;}
.news-row h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--c-text);transition:color .2s ease;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.news-row:hover h3{color:var(--c-primary);}
.news-row p{margin-top:8px;font-size:14px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-row-meta{flex:0 0 auto;text-align:right;display:flex;flex-direction:column;align-items:flex-end;gap:8px;}
.news-row-meta time{font-size:13px;color:var(--c-text-3);}
.meta-line{margin-top:12px;display:flex;align-items:center;gap:12px;font-size:13px;color:var(--c-text-3);flex-wrap:wrap;}
.meta-line .sep{width:1px;height:12px;background:var(--c-border);}

/* ---------- 空态 ---------- */
.empty-state{border:1px dashed #C9DAF0;border-radius:var(--r-card);background:#FBFDFF;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:32px 24px;}
.empty-state svg{width:40px;height:40px;stroke:rgba(23,83,155,.4);fill:none;stroke-width:1.5;}
.empty-state p{font-size:14px;color:var(--c-text-3);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-border);}
.faq-item{border-bottom:1px solid var(--c-border);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px 0;background:none;border:0;text-align:left;font-size:17px;font-weight:600;line-height:1.5;color:var(--c-text);transition:color .2s ease;}
.faq-q:hover{color:var(--c-primary);}
.faq-icon{position:relative;flex:0 0 auto;width:18px;height:18px;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-primary);border-radius:1px;}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;transition:transform .2s ease,opacity .2s ease;}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.is-open .faq-a{max-height:420px;}
.faq-a p{padding:0 60px 24px 0;font-size:15px;line-height:1.9;color:var(--c-text-2);}

/* ---------- 联系与表单 ---------- */
.contact-list{margin-top:32px;}
.contact-item{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-top:1px solid var(--c-border);}
.contact-item:last-child{border-bottom:1px solid var(--c-border);}
.contact-icon{flex:0 0 auto;width:36px;height:36px;border-radius:8px;background:var(--c-primary-50);display:flex;align-items:center;justify-content:center;}
.contact-icon svg{width:20px;height:20px;stroke:var(--c-primary);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.contact-item strong{display:block;font-size:16px;font-weight:600;color:var(--c-text);}
.contact-item span{display:block;margin-top:4px;font-size:14px;color:var(--c-text-3);}
.form-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:32px;}
.form-card h3{font-size:20px;font-weight:600;color:var(--c-text);}
.form-card > p{margin-top:8px;font-size:14px;color:var(--c-text-3);}
.field{margin-top:20px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--c-text-2);margin-bottom:8px;}
.field input[type="text"],.field input[type="tel"],.field input[type="email"],.field textarea{width:100%;border:1px solid var(--c-border);border-radius:var(--r-input);background:#fff;padding:11px 14px;font-size:15px;line-height:1.5;color:var(--c-text);transition:border-color .2s ease,box-shadow .2s ease;}
.field input[type="text"],.field input[type="tel"],.field input[type="email"]{height:44px;}
.field textarea{min-height:112px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:var(--c-text-3);}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(23,83,155,.12);}
.field.is-error input,.field.is-error textarea{border-color:var(--c-error);}
.field-error{display:none;margin-top:6px;font-size:14px;color:var(--c-error);}
.field.is-error .field-error{display:block;}
.check-line{margin-top:20px;display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--c-text-2);}
.check-line input{margin-top:4px;width:16px;height:16px;accent-color:var(--c-primary);}
.form-actions{margin-top:24px;}
.form-note{margin-top:12px;font-size:13px;color:var(--c-text-3);}
.form-success{display:none;margin-top:18px;padding:14px 16px;border-radius:var(--r-input);background:rgba(14,140,110,.08);border:1px solid rgba(14,140,110,.24);color:var(--c-success);font-size:14px;}
.form-success.is-show{display:block;}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--c-primary-50);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);padding:40px 0;}
.cta-band-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-band h2{font-size:22px;font-weight:600;color:var(--c-text);}
.cta-band p{margin-top:8px;font-size:15px;color:var(--c-text-2);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-700);color:#fff;padding:64px 0 0;}
.site-footer a{color:rgba(255,255,255,.82);}
.site-footer a:hover{color:#fff;}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.1fr);gap:40px;padding-bottom:48px;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.78);}
.footer-brand .brand-mark{background:rgba(255,255,255,.16);}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.78);max-width:320px;}
.footer-col h3{font-size:16px;font-weight:600;color:#fff;margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{font-size:14px;line-height:1.6;text-decoration:none;}
.footer-col ul li a:hover{text-decoration:none;color:#fff;padding-left:2px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.78);}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0;}
  .hero{padding:56px 0 72px;}
  .split{gap:36px;}
  .split-hero{grid-template-columns:minmax(0,1fr);gap:40px;}
  .hero h1{font-size:32px;}
  .split-4-8,.split-5-7,.split-2-1{grid-template-columns:minmax(0,1fr);}
  .sticky-col{position:static;top:auto;}
  .service-list{column-gap:32px;}
  .case-grid{grid-template-columns:minmax(0,1fr);}
  .case-side{grid-template-rows:none;grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .nav-toggle{display:inline-flex;}
  .nav-panel{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--c-border);box-shadow:var(--sh-nav);padding:8px 0 0;margin-left:0;}
  .nav-panel.is-open{display:flex;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu a{height:52px;border-radius:0;padding:0 24px;border-bottom:1px solid var(--c-border);font-size:16px;}
  .nav-menu a:hover{background:var(--c-primary-50);}
  .nav-menu a.is-active::after{display:none;}
  .nav-menu a.is-active{border-left:3px solid var(--c-primary);background:var(--c-primary-50);}
  .nav-cta{padding:16px 24px 20px;margin-left:0;}
  .nav-cta .btn{width:100%;}
}
@media (max-width:768px){
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:28px;}
  .stat:nth-child(3){border-left:0;}
  .stat{padding:6px 12px;}
  .service-list{grid-template-columns:minmax(0,1fr);}
  .hero h1{font-size:29px;}
  .section-head h2{font-size:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .stats{padding:40px 0;}
  .troubleshoot-hidden{display:none;}
  .topbar-note,.topbar-actions .topbar-hide{display:none;}
  .brand-sub{display:none;}
  .hero{padding:44px 0 56px;}
  .hero h1{font-size:26px;line-height:1.35;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .stat-num{font-size:32px;}
  .case-side{grid-template-columns:minmax(0,1fr);}
  .card-body{padding:20px;}
  .form-card{padding:22px;}
  .faq-a p{padding-right:0;}
  .cta-band-inner{flex-direction:column;align-items:flex-start;}
  .cta-band .btn{width:100%;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .news-row{flex-direction:column;gap:10px;}
  .news-row-meta{text-align:left;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --c-primary:#17539B;
  --c-primary-700:#103E76;
  --c-primary-50:#EAF1FA;
  --c-accent:#D9822B;
  --c-accent-700:#B96A1F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF2;
  --c-text:#1C2530;
  --c-text-2:#4A5568;
  --c-text-3:#7C8794;
  --c-ok:#0E8C6E;
  --c-err:#C0392B;

  --r-card:10px;
  --r-btn:8px;
  --r-img:12px;
  --r-pill:999px;

  --sh-card:0 8px 24px rgba(23,83,155,.08);
  --sh-card-hover:0 14px 32px rgba(23,83,155,.14);
  --sh-nav:0 2px 12px rgba(23,83,155,.06);

  --sp-1:8px; --sp-2:12px; --sp-3:16px; --sp-4:24px;
  --sp-5:32px; --sp-6:48px; --sp-7:64px; --sp-8:88px;

  --font: "Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --nav-h:68px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  color:var(--c-text);
  background:var(--c-bg);
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
a:focus-visible,button:focus-visible{outline:2px solid rgba(23,83,155,.4);outline-offset:2px}
h1,h2,h3,h4{margin:0;font-weight:600;color:var(--c-text);letter-spacing:0}
p{margin:0 0 1.2em}
ul,ol{margin:0 0 1.2em;padding-left:1.2em}
button{font-family:inherit}
::selection{background:rgba(217,130,43,.22)}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 26px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--c-accent);color:#fff}
.btn-primary:hover{background:var(--c-accent-700);color:#fff}
.btn-outline{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-50);color:var(--c-primary)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-lg{height:50px;padding:0 30px;font-size:16px}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:var(--r-pill);
  background:var(--c-primary-50);
  color:var(--c-primary);
  font-size:12px;
  font-weight:600;
  line-height:1;
}
.tag{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--c-border);
  background:#fff;
  font-size:13px;
  color:var(--c-text-2);
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);text-decoration:none}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--c-primary-700);
  color:rgba(255,255,255,.86);
  font-size:13px;
  line-height:1.6;
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:38px;
  padding-top:6px;
  padding-bottom:6px;
}
.topbar-domain{color:#fff;font-weight:600;letter-spacing:.3px}
.topbar-note{color:rgba(255,255,255,.78)}
.topbar-actions{display:flex;align-items:center;gap:12px}
.topbar-actions a{color:#fff;font-size:13px}
.topbar-actions a:hover{color:#F3C08A;text-decoration:none}
.topbar-actions i{width:1px;height:12px;background:rgba(255,255,255,.28);display:inline-block}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:var(--sh-nav)}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:var(--nav-h);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--c-primary);
}
.brand:hover{text-decoration:none;color:var(--c-primary)}
.brand-mark{
  width:22px;height:22px;border-radius:5px;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary) 55%,var(--c-accent) 55%,var(--c-accent) 100%);
  flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:20px;font-weight:600;color:var(--c-primary)}
.brand-sub{font-size:12px;color:var(--c-text-3);font-weight:400}
.nav-panel{display:flex;align-items:center;gap:32px;flex:1;justify-content:flex-end}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:22px 0;
  font-size:15px;
  color:var(--c-text-2);
}
.nav-menu a::after{
  content:"";
  position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s ease;
}
.nav-menu a:hover{color:var(--c-primary);text-decoration:none}
.nav-menu a:hover::after,.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--c-primary);font-weight:600}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--c-border);
  border-radius:var(--r-btn);
  background:#fff;
  cursor:pointer;
  padding:0;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 20px;
  padding:0;
  list-style:none;
  font-size:13px;
  color:var(--c-text-3);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:#C3CCD8}
.breadcrumb a{color:var(--c-text-3)}
.breadcrumb a:hover{color:var(--c-primary);text-decoration:none}
.breadcrumb .current{color:var(--c-primary);font-weight:600}

/* ---------- 文章头部 ---------- */
.article-hero{
  background:#fff;
  border-bottom:1px solid var(--c-border);
  padding:48px 0 40px;
}
.article-hero-inner{max-width:880px}
.article-title{
  font-size:34px;
  line-height:1.4;
  font-weight:600;
  max-width:780px;
  margin-bottom:18px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  font-size:14px;
  color:var(--c-text-3);
}
.article-meta .sep{width:1px;height:12px;background:var(--c-border)}
.article-lead{
  margin-top:22px;
  max-width:780px;
  font-size:16px;
  color:var(--c-text-2);
}

/* ---------- 正文布局 ---------- */
.article-section{padding:56px 0 88px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,780px) 296px;
  gap:56px;
  justify-content:center;
  align-items:start;
}
.article-layout.is-single{grid-template-columns:minmax(0,780px);justify-content:center}

.article-body-wrap{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:44px 48px;
}
.article-body{font-size:16.5px;line-height:1.9;color:var(--c-text)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.3em}
.article-body h2{
  position:relative;
  font-size:24px;
  line-height:1.45;
  margin:44px 0 18px;
  padding-left:14px;
  scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";
  position:absolute;left:0;top:6px;bottom:6px;width:3px;
  background:var(--c-primary);border-radius:2px;
}
.article-body h3{font-size:19px;line-height:1.5;margin:32px 0 14px;scroll-margin-top:96px}
.article-body h4{font-size:17px;margin:24px 0 10px}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.3em}
.article-body li{margin-bottom:.5em}
.article-body ul li::marker{color:var(--c-primary)}
.article-body ol li::marker{color:var(--c-primary);font-weight:600}
.article-body blockquote{
  margin:24px 0;
  padding:16px 22px;
  border-left:3px solid var(--c-primary);
  background:var(--c-primary-50);
  border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--c-text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  width:100%;
  border-radius:var(--r-img);
  margin:26px 0;
}
.article-body figure{margin:26px 0}
.article-body figcaption{
  margin-top:10px;
  text-align:center;
  font-size:13px;
  color:var(--c-text-3);
}
.article-body table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:15px;
  margin:24px 0;
}
.article-body thead{background:var(--c-primary-50)}
.article-body th,.article-body td{
  border:1px solid var(--c-border);
  padding:10px 14px;
  text-align:left;
  white-space:nowrap;
}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-accent)}
.article-body hr{border:0;border-top:1px solid var(--c-border);margin:36px 0}

.article-tags{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-top:40px;
  padding-top:28px;
  border-top:1px solid var(--c-border);
}
.article-tags .tags-label{font-size:14px;color:var(--c-text-3);margin-right:4px}

/* ---------- 空态 ---------- */
.empty-state{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  min-height:240px;
  padding:48px 24px;
  border:1px dashed #C9DAF0;
  border-radius:var(--r-card);
  background:var(--c-primary-50);
  text-align:center;
}
.empty-state svg{width:38px;height:38px;stroke:rgba(23,83,155,.4);fill:none;stroke-width:1.5}
.empty-state p{margin:0;font-size:14px;color:var(--c-text-3)}

/* ---------- 侧栏 ---------- */
.article-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:24px}
.aside-card{
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:24px;
}
.aside-card h3{
  font-size:16px;
  margin-bottom:14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--c-border);
}
.aside-list{list-style:none;margin:0;padding:0}
.aside-list li + li{border-top:1px solid var(--c-border)}
.aside-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:13px 0;
  font-size:15px;
  color:var(--c-text-2);
}
.aside-list a:hover{color:var(--c-primary);text-decoration:none}
.aside-list a i{font-size:12px;color:#C3CCD8}
.aside-list a:hover i{color:var(--c-accent)}
.aside-note{font-size:14px;color:var(--c-text-3);margin:0 0 16px}
.aside-contact{background:var(--c-primary-50);border-color:#D6E3F5}

/* ---------- 继续浏览 ---------- */
.next-nav{padding:0 0 72px}
.next-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.next-card{
  display:block;
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:24px 26px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.next-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);text-decoration:none}
.next-card span.label{font-size:13px;color:var(--c-text-3)}
.next-card strong{display:block;margin-top:8px;font-size:17px;color:var(--c-text)}
.next-card:hover strong{color:var(--c-primary)}

/* ---------- 相关推荐 ---------- */
.related{padding:0 0 88px}
.section-head{margin-bottom:32px}
.section-head h2{font-size:28px;line-height:1.4}
.section-head p{margin:10px 0 0;color:var(--c-text-2);font-size:15px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;
  flex-direction:column;
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--c-primary-50)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:18px;line-height:1.5}
.card-body h3 a{color:var(--c-text)}
.card-body h3 a:hover{color:var(--c-primary);text-decoration:none}
.card-body p{margin:0;font-size:15px;color:var(--c-text-2);line-height:1.8}
.card-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--c-text-3);margin-top:auto;padding-top:8px}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-primary-50);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
  padding:44px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-inner h2{font-size:24px;line-height:1.4;margin-bottom:8px}
.cta-inner p{margin:0;color:var(--c-text-2);font-size:15px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-primary-700);
  color:rgba(255,255,255,.78);
  padding:64px 0 0;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.6)}
.footer-brand p{margin:16px 0 0;font-size:14px;line-height:1.85;color:rgba(255,255,255,.72)}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:10px}
.footer-col a{color:rgba(255,255,255,.78);font-size:14px}
.footer-col a:hover{color:#F3C08A;text-decoration:none}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;
  color:rgba(255,255,255,.62);
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .container{padding:0 20px}
  .article-hero{padding:36px 0 32px}
  .article-title{font-size:28px}
  .article-section{padding:40px 0 64px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;justify-content:stretch}
  .article-aside{position:static}
  .article-body-wrap{padding:32px 28px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-menu{gap:20px}
  .nav-panel{gap:20px}
}
@media screen and (max-width:900px){
  .nav-toggle{display:flex}
  .nav-panel{
    position:absolute;
    left:0;right:0;top:100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:#fff;
    border-top:1px solid var(--c-border);
    border-bottom:1px solid var(--c-border);
    box-shadow:var(--sh-nav);
    padding:8px 20px 20px;
  }
  .nav-panel.is-open{display:flex}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0}
  .nav-menu a{padding:15px 0;border-bottom:1px solid var(--c-border);min-height:52px;display:flex;align-items:center}
  .nav-menu a::after{display:none}
  .nav-menu a.is-active{color:var(--c-primary)}
  .nav-cta{margin-top:16px}
  .nav-cta .btn{width:100%}
  .next-grid{grid-template-columns:1fr}
}
@media screen and (max-width:640px){
  .container{padding:0 16px}
  .topbar-note,.topbar-actions a:last-child,.topbar-actions i{display:none}
  .article-hero{padding:28px 0 26px}
  .article-title{font-size:24px}
  .article-section{padding:28px 0 52px}
  .article-body-wrap{padding:24px 18px}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px;margin-top:34px}
  .article-body h3{font-size:18px}
  .section-head h2{font-size:22px}
  .card-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:20px}
  .cta-inner .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
}

/* roulang page: category1 */
:root{
  --c-primary:#17539B;
  --c-primary-700:#103E76;
  --c-primary-50:#EAF1FA;
  --c-accent:#D9822B;
  --c-accent-700:#B96A1F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF2;
  --c-text:#1C2530;
  --c-text-2:#4A5568;
  --c-text-3:#7C8794;
  --c-inverse:#FFFFFF;
  --c-inverse-2:rgba(255,255,255,.78);
  --c-success:#0E8C6E;
  --c-error:#C0392B;
  --r-card:10px;
  --r-btn:8px;
  --r-input:8px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 8px 24px rgba(23,83,155,.08);
  --sh-card-hover:0 14px 32px rgba(23,83,155,.14);
  --sh-nav:0 2px 12px rgba(23,83,155,.06);
  --sp-1:8px;--sp-2:12px;--sp-3:16px;--sp-4:24px;--sp-5:32px;--sp-6:48px;--sp-7:64px;--sp-8:88px;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,text-decoration-color .2s ease}
a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid rgba(23,83,155,.4);
  outline-offset:2px;
}
h1,h2,h3,h4{margin:0;font-weight:600;color:var(--c-text);letter-spacing:0}
h1{font-size:40px;line-height:1.3}
h2{font-size:30px;line-height:1.35}
h3{font-size:20px;line-height:1.5}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-head{max-width:none;margin-bottom:var(--sp-6)}
.section-head h2{font-size:30px}
.section-head p{margin-top:var(--sp-2);color:var(--c-text-2);font-size:16px;max-width:720px}
.eyebrow{
  display:inline-block;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--c-primary);
  background:var(--c-primary-50);
  border-radius:var(--r-pill);
  padding:4px 12px;
  margin-bottom:var(--sp-3);
}
.muted{color:var(--c-text-3)}
.divider{height:1px;background:var(--c-border);border:0;margin:0}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--c-primary-700);color:var(--c-inverse);font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px}
.topbar-domain{color:var(--c-inverse-2);letter-spacing:.02em}
.topbar-tip{color:var(--c-inverse-2)}
.topbar-actions{display:flex;align-items:center;gap:12px}
.topbar-actions a{color:var(--c-inverse)}
.topbar-actions a:hover{color:#F3D3AC;text-decoration:none}
.topbar-actions .sep{width:1px;height:14px;background:rgba(255,255,255,.24);display:inline-block}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:var(--sh-nav)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px;position:relative}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--c-primary);text-decoration:none}
.brand:hover{text-decoration:none;color:var(--c-primary-700)}
.brand-mark{
  width:26px;height:26px;border-radius:6px;
  background:linear-gradient(140deg,var(--c-primary) 0%,var(--c-primary-700) 100%);
  position:relative;flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;right:5px;bottom:5px;width:9px;height:9px;border-radius:2px;background:var(--c-accent);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:20px;font-weight:600;color:var(--c-primary);letter-spacing:.01em}
.brand-sub{font-size:12px;color:var(--c-text-3);font-weight:400}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0;border:1px solid var(--c-border);border-radius:var(--r-btn);
  background:var(--c-surface);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;margin:0 auto;background:var(--c-primary);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-panel{display:flex;align-items:center;justify-content:flex-end;gap:24px;flex:1 1 auto}
.nav-menu{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav-menu a{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;
  font-size:15px;color:var(--c-text-2);border-radius:var(--r-btn);
  border-bottom:2px solid transparent;transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.nav-menu a:hover{color:var(--c-primary);background:var(--c-primary-50);text-decoration:none}
.nav-menu a.is-active{color:var(--c-primary);font-weight:600;border-bottom-color:var(--c-primary);border-radius:0}
.nav-cta{display:flex;align-items:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;text-decoration:none;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--c-accent);color:#fff;border-color:var(--c-accent)}
.btn-primary:hover{background:var(--c-accent-700);color:#fff;border-color:var(--c-accent-700);box-shadow:0 10px 22px rgba(185,106,31,.22)}
.btn-outline{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-50);color:var(--c-primary-700);border-color:var(--c-primary-700)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.text-link{font-weight:600;font-size:15px}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--c-primary-50);
  border-bottom:1px solid var(--c-border);
  padding:48px 0 64px;
}
.page-hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:440px;height:440px;
  background:rgba(23,83,155,.07);border-radius:56px;transform:rotate(16deg);pointer-events:none;
}
.page-hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:56px;align-items:center}
.breadcrumb{font-size:13px;margin-bottom:var(--sp-4)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--c-text-3)}
.breadcrumb li:not(:last-child)::after{content:"/";margin-left:8px;color:#B9C4D2}
.breadcrumb a{color:var(--c-text-3)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb li[aria-current]{color:var(--c-primary);font-weight:600}
.page-hero h1{font-size:40px;margin-bottom:var(--sp-3)}
.hero-lead{font-size:17px;line-height:1.9;color:var(--c-text-2);max-width:640px;margin-bottom:var(--sp-5)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.page-hero-media{border-radius:var(--r-img);overflow:hidden;background:#DDE7F4;box-shadow:var(--sh-card)}
.page-hero-media img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}

/* ---------- 通用媒体框 ---------- */
.media-frame{border-radius:var(--r-img);overflow:hidden;background:#E3EAF5;box-shadow:var(--sh-card)}
.media-frame img{width:100%;height:100%;object-fit:cover;display:block}
.ratio-16-10{aspect-ratio:16/10}
.ratio-4-3{aspect-ratio:4/3}

/* ---------- 交错图文 ---------- */
.zigzag{display:flex;flex-direction:column;gap:var(--sp-7)}
.zigzag-item{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-6);align-items:center}
.zigzag-item .zigzag-text h3{margin-bottom:var(--sp-2)}
.zigzag-item .zigzag-text p{color:var(--c-text-2);font-size:16px;line-height:1.9}
.zigzag-item.is-reversed .zigzag-media{order:2}
.zigzag-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:6px;background:var(--c-primary-50);
  color:var(--c-primary);font-size:13px;font-weight:600;margin-bottom:var(--sp-2);
}
.point-list{margin-top:var(--sp-4);border-top:1px solid var(--c-border)}
.point-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px solid var(--c-border);
  font-size:15px;color:var(--c-text-2);
}
.point-list li::before{
  content:"";flex:0 0 auto;width:7px;height:7px;margin-top:9px;
  background:var(--c-primary);border-radius:2px;
}

/* ---------- 编号列表（板块：覆盖范围） ---------- */
.split{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:var(--sp-7);align-items:start}
.split-aside{position:sticky;top:104px}
.split-aside h2{margin-bottom:var(--sp-3)}
.split-aside p{color:var(--c-text-2);font-size:15px}
.code-list{border-top:1px solid var(--c-border)}
.code-list li{
  display:grid;grid-template-columns:52px minmax(0,1fr) 24px;
  gap:20px;align-items:start;
  padding:22px 0;border-bottom:1px solid var(--c-border);
}
.code-num{
  width:44px;height:32px;border-radius:6px;background:var(--c-primary);
  color:#fff;font-size:14px;font-weight:600;
  display:inline-flex;align-items:center;justify-content:center;
}
.code-body h3{font-size:18px;margin-bottom:6px}
.code-body p{color:var(--c-text-2);font-size:15px;line-height:1.85;margin:0}
.code-arrow{color:#B9C4D2;font-size:16px;padding-top:6px;transition:color .2s ease,transform .2s ease}
.code-list li:hover .code-arrow{color:var(--c-accent);transform:translateX(3px)}

/* ---------- 数据带 ---------- */
.stats-band{background:var(--c-primary-50);padding:48px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{padding:0 24px;border-left:1px solid #D3E0F0}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{display:block;font-size:38px;line-height:1.15;font-weight:600;color:var(--c-primary)}
.stat-label{display:block;margin-top:6px;font-size:14px;color:var(--c-text-3)}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-5);counter-reset:step}
.step{
  position:relative;background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);padding:28px 24px 26px;box-shadow:var(--sh-card);
  transition:transform .25s ease,box-shadow .25s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  display:block;font-size:14px;font-weight:600;color:var(--c-accent);margin-bottom:12px;letter-spacing:.06em;
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--c-text-2);font-size:15px;line-height:1.85;margin:0}

/* ---------- 卡片 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;
  background:var(--c-primary-50);color:var(--c-primary);
  font-size:12px;line-height:1;border-radius:var(--r-pill);
  padding:5px 10px;
}
.card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  transition:transform .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover)}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:var(--sp-7);align-items:start}
.accordion{margin:0;border:0;background:transparent}
.accordion .accordion-item{border:0;border-top:1px solid var(--c-border);background:transparent}
.accordion .accordion-item:last-child{border-bottom:1px solid var(--c-border)}
.accordion .accordion-title{
  display:block;position:relative;
  padding:22px 48px 22px 0;margin:0;
  font-size:17px;font-weight:600;color:var(--c-text);
  background:transparent;border:0;transition:color .2s ease;
}
.accordion .accordion-title:hover{color:var(--c-primary);background:transparent}
.accordion .accordion-title::before{
  content:"+";position:absolute;right:10px;top:50%;
  transform:translateY(-50%);margin:0;
  font-size:22px;line-height:1;font-weight:400;color:var(--c-primary);
  transition:transform .2s ease;
}
.accordion .accordion-title::after{display:none}
.accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg)}
.accordion .accordion-content{
  padding:0 48px 22px 0;border:0;background:transparent;
  color:var(--c-text-2);font-size:15px;line-height:1.9;
}
.accordion .accordion-content p{margin:0}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--c-primary-50);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);padding:44px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:24px;margin-bottom:6px}
.cta-inner p{color:var(--c-text-2);font-size:15px;margin:0}

/* ---------- 联系 / 表单 ---------- */
.contact-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:var(--sp-6);align-items:start}
.contact-list{margin-top:var(--sp-5);border-top:1px solid var(--c-border)}
.contact-list li{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--c-border)}
.contact-icon{
  flex:0 0 auto;width:38px;height:38px;border-radius:8px;background:var(--c-primary-50);
  display:inline-flex;align-items:center;justify-content:center;color:var(--c-primary);font-size:15px;
}
.contact-list strong{display:block;font-size:16px;font-weight:600;color:var(--c-text)}
.contact-list span.sub{display:block;font-size:14px;color:var(--c-text-3);margin-top:2px}
.form-card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-card);padding:32px;
}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:8px}
.field input,.field textarea{
  width:100%;height:44px;padding:0 14px;
  border:1px solid var(--c-border);border-radius:var(--r-input);
  font-size:15px;color:var(--c-text);background:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:auto;min-height:124px;padding:12px 14px;line-height:1.75;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--c-text-3)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(23,83,155,.12)}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--c-text-2);margin-bottom:20px}
.check-row input{width:18px;height:18px;margin-top:4px;accent-color:var(--c-primary)}
.form-note{font-size:13px;color:var(--c-text-3);margin-top:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-700);color:var(--c-inverse);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col ul li{margin-bottom:10px}
.footer-col a{color:var(--c-inverse-2);font-size:14px}
.footer-col a:hover{color:#fff;text-decoration:none}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.6)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:var(--c-inverse-2)}
.footer-bottom{
  margin-top:48px;padding:20px 0 24px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.7);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding:0 20px}
  .section{padding:72px 0}
  h1{font-size:32px}
  .page-hero h1{font-size:32px}
  h2,.section-head h2{font-size:26px}
  .page-hero-inner{grid-template-columns:minmax(0,1fr);gap:32px}
  .page-hero-media{max-width:520px}
  .split,.faq-wrap,.contact-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .split-aside{position:static}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:32px}
  .stat:nth-child(3){border-left:0;padding-left:0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .nav-toggle{display:flex}
  .nav-panel{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--c-surface);border-top:1px solid var(--c-border);
    box-shadow:var(--sh-card);padding:8px 0 16px;gap:0;
    flex-direction:column;align-items:stretch;
  }
  .nav-panel.is-open{display:flex}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0}
  .nav-menu a{height:52px;padding:0 24px;border-bottom:1px solid var(--c-border);border-radius:0;justify-content:flex-start}
  .nav-menu a.is-active{border-bottom-color:var(--c-border);box-shadow:inset 3px 0 0 var(--c-primary)}
  .nav-cta{padding:16px 24px 0}
  .nav-cta .btn{width:100%}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  h1{font-size:28px}
  .page-hero h1{font-size:28px;line-height:1.35}
  h2,.section-head h2{font-size:23px}
  h3{font-size:18px}
  .hero-lead{font-size:16px}
  .topbar-tip{display:none}
  .topbar-actions a:first-child{display:none}
  .topbar-actions .sep{display:none}
  .zigzag-item{grid-template-columns:minmax(0,1fr);gap:24px}
  .zigzag-item.is-reversed .zigzag-media{order:0}
  .steps{grid-template-columns:minmax(0,1fr)}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:26px}
  .stat{padding:0 16px}
  .stat-num{font-size:28px}
  .code-list li{grid-template-columns:44px minmax(0,1fr);gap:14px}
  .code-arrow{display:none}
  .form-card{padding:22px 18px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-inner .btn{width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}

/* roulang page: category2 */
/* ================= 设计变量 ================= */
:root{
  --c-primary:#17539B;
  --c-primary-700:#103E76;
  --c-primary-50:#EAF1FA;
  --c-accent:#D9822B;
  --c-accent-700:#B96A1F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF2;
  --c-text:#1C2530;
  --c-text-2:#4A5568;
  --c-text-3:#7C8794;
  --c-success:#0E8C6E;
  --c-danger:#C0392B;
  --c-dash:#C9DAF0;
  --r-card:10px;
  --r-btn:8px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 8px 24px rgba(23,83,155,.08);
  --sh-card-hover:0 14px 32px rgba(23,83,155,.14);
  --sh-nav:0 2px 12px rgba(23,83,155,.06);
  --container:1200px;
  --font-base:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}

/* ================= reset / base ================= */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-base);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{display:block;max-width:100%;height:auto;border:0;}
a{
  color:var(--c-primary);
  text-decoration:none;
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
a:hover,a:focus{color:var(--c-accent);}
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible{
  outline:2px solid rgba(23,83,155,.4);
  outline-offset:2px;
  border-radius:4px;
}
button{font-family:inherit;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{
  font-size:30px;
  line-height:1.35;
  font-weight:600;
  letter-spacing:0;
}
.section-head p{
  margin-top:14px;
  font-size:16px;
  color:var(--c-text-2);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--c-primary);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--c-accent);
  display:inline-block;
}
[id]{scroll-margin-top:96px;}

/* 覆盖 Foundation 默认链接与按钮味道 */
a.button,.button,button.button{
  font-family:var(--font-base);
  background:var(--c-primary);
  border-radius:var(--r-btn);
  text-transform:none;
}
a:hover.button,a:focus.button{background:var(--c-primary-700);}
.accordion{
  background:transparent;
  border:0;
  border-radius:0;
}
.accordion .accordion-item{border:0;background:transparent;}
.menu a{color:var(--c-text-2);}

/* ================= 按钮 ================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  font-size:16px;
  font-weight:600;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{
  background:var(--c-accent);
  color:#fff;
  box-shadow:0 6px 18px rgba(217,130,43,.24);
}
.btn-primary:hover,.btn-primary:focus{
  background:var(--c-accent-700);
  color:#fff;
  transform:translateY(-1px);
}
.btn-outline{
  background:var(--c-surface);
  color:var(--c-primary);
  border-color:var(--c-primary);
}
.btn-outline:hover,.btn-outline:focus{
  background:var(--c-primary-50);
  color:var(--c-primary-700);
  border-color:var(--c-primary-700);
}
.btn-ghost{
  background:transparent;
  color:var(--c-primary);
  border-color:var(--c-border);
}
.btn-ghost:hover,.btn-ghost:focus{
  background:var(--c-surface);
  border-color:var(--c-primary);
  color:var(--c-primary);
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--c-primary);
}
.text-link:hover,.text-link:focus{color:var(--c-accent);text-decoration:underline;}
.text-link i{font-size:13px;}

/* ================= 徽章 / 标签 ================= */
.badge{
  display:inline-block;
  padding:4px 10px;
  font-size:12px;
  line-height:1.5;
  color:var(--c-primary);
  background:var(--c-primary-50);
  border-radius:var(--r-pill);
}
.tag{
  display:inline-block;
  padding:6px 14px;
  font-size:13px;
  color:var(--c-text-2);
  border:1px solid var(--c-border);
  background:var(--c-surface);
  border-radius:var(--r-pill);
  transition:border-color .2s ease,color .2s ease;
}
.tag:hover,.tag:focus{border-color:var(--c-primary);color:var(--c-primary);}

/* ================= 顶部导航 ================= */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-nav);}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:70px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--c-primary);
  flex-shrink:0;
}
.brand:hover,.brand:focus{color:var(--c-primary-700);}
.brand-mark{
  width:22px;
  height:22px;
  border-radius:6px;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-700) 60%,var(--c-accent) 60%,var(--c-accent) 100%);
  flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:20px;font-weight:600;letter-spacing:0;}
.brand-sub{font-size:12px;color:var(--c-text-3);}
.nav-panel{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:auto;
}
.nav-menu{display:flex;align-items:center;gap:6px;}
.nav-menu a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:70px;
  padding:0 14px;
  font-size:15px;
  color:var(--c-text-2);
  font-weight:500;
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:0;
  height:2px;
  background:transparent;
  transition:background-color .2s ease;
}
.nav-menu a:hover,.nav-menu a:focus{color:var(--c-primary);}
.nav-menu a:hover::after,.nav-menu a:focus::after{background:var(--c-primary-50);}
.nav-menu a.is-active{color:var(--c-primary);font-weight:600;}
.nav-menu a.is-active::after{background:var(--c-primary);}
.nav-cta{display:flex;align-items:center;gap:14px;}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  margin-left:auto;
  background:transparent;
  border:1px solid var(--c-border);
  border-radius:var(--r-btn);
  cursor:pointer;
  padding:0 11px;
}
.nav-toggle span{
  display:block;
  height:2px;
  width:100%;
  background:var(--c-primary);
  border-radius:2px;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ================= 页头 banner ================= */
.page-hero{
  background:var(--c-primary-50);
  border-bottom:1px solid var(--c-border);
  position:relative;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  left:-120px;
  top:-80px;
  width:420px;
  height:420px;
  background:var(--c-primary);
  opacity:.05;
  transform:rotate(22deg);
  border-radius:48px;
  pointer-events:none;
}
.page-hero-inner{
  position:relative;
  padding:56px 0 60px;
  align-items:center;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-text-3);
  margin-bottom:18px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--c-border);}
.breadcrumb a{color:var(--c-text-3);}
.breadcrumb a:hover,.breadcrumb a:focus{color:var(--c-primary);}
.breadcrumb .current{color:var(--c-primary);font-weight:600;}
.page-hero h1{
  font-size:40px;
  line-height:1.3;
  font-weight:600;
  letter-spacing:0;
  max-width:640px;
}
.page-hero-lead{
  margin-top:18px;
  font-size:17px;
  line-height:1.85;
  color:var(--c-text-2);
  max-width:620px;
}
.page-hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  margin-top:24px;
}
.page-hero-points li{
  position:relative;
  padding-left:16px;
  font-size:14px;
  color:var(--c-text-2);
}
.page-hero-points li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--c-accent);
}
.page-hero-media{
  position:relative;
}
.page-hero-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--c-border);
  box-shadow:var(--sh-card);
}

/* ================= 主体布局 ================= */
.main-wrap{padding:72px 0 88px;}
.anchor-nav{
  position:sticky;
  top:96px;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:22px 20px;
  box-shadow:var(--sh-card);
}
.anchor-nav h2{
  font-size:15px;
  font-weight:600;
  color:var(--c-text-3);
  letter-spacing:.04em;
  margin-bottom:14px;
}
.anchor-nav ul{display:flex;flex-direction:column;}
.anchor-nav li+li{border-top:1px solid var(--c-border);}
.anchor-nav a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:46px;
  padding:8px 0 8px 12px;
  font-size:15px;
  color:var(--c-text-2);
  border-left:2px solid transparent;
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.anchor-nav a:hover,.anchor-nav a:focus{
  color:var(--c-primary);
  border-left-color:var(--c-primary);
  background:var(--c-primary-50);
}
.anchor-nav a.is-current{
  color:var(--c-primary);
  font-weight:600;
  border-left-color:var(--c-primary);
  background:var(--c-primary-50);
}
.anchor-nav .nav-note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--c-border);
  font-size:13px;
  line-height:1.7;
  color:var(--c-text-3);
}

.longform{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  padding:44px 46px;
  box-shadow:var(--sh-card);
}
.longform > p{
  font-size:16.5px;
  line-height:1.9;
  color:var(--c-text-2);
}
.longform > p + p{margin-top:1.2em;}
.longform-block{
  padding-top:44px;
  margin-top:44px;
  border-top:1px solid var(--c-border);
}
.longform-block:first-of-type{margin-top:36px;}
.longform-block h2{
  position:relative;
  padding-left:16px;
  font-size:24px;
  line-height:1.4;
  font-weight:600;
}
.longform-block h2::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  bottom:8px;
  width:3px;
  border-radius:2px;
  background:var(--c-primary);
}
.longform-block > p{
  margin-top:18px;
  font-size:16px;
  line-height:1.9;
  color:var(--c-text-2);
}
.longform-block > p + p{margin-top:1.2em;}
.point-list{
  margin-top:22px;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px 28px;
}
.point-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  line-height:1.8;
  color:var(--c-text-2);
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:7px;
  height:7px;
  border-radius:2px;
  background:var(--c-primary);
  opacity:.85;
}
.figure-wide{
  margin-top:30px;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--c-border);
}
.figure-wide img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.figure-wide figcaption{
  padding:12px 16px;
  font-size:13px;
  color:var(--c-text-3);
  background:var(--c-surface);
  border-top:1px solid var(--c-border);
}
.note-box{
  margin-top:26px;
  padding:20px 22px;
  border-left:3px solid var(--c-primary);
  background:var(--c-primary-50);
  border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:15px;
  line-height:1.85;
  color:var(--c-text-2);
}
.note-box strong{color:var(--c-primary-700);font-weight:600;}

/* ================= 流程步骤 ================= */
.flow-band{
  background:var(--c-surface);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
}
.flow-grid{
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:0;
  margin-top:8px;
}
.flow-item{
  position:relative;
  padding:26px 22px 26px 0;
  border-right:1px solid var(--c-border);
}
.flow-item:last-child{border-right:0;}
.flow-item .idx{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:8px;
  background:var(--c-primary-50);
  color:var(--c-primary);
  font-size:14px;
  font-weight:600;
  margin-bottom:16px;
}
.flow-item h3{
  font-size:17px;
  font-weight:600;
  line-height:1.5;
}
.flow-item p{
  margin-top:10px;
  font-size:14px;
  line-height:1.8;
  color:var(--c-text-2);
}

/* ================= 场景卡片 ================= */
.scene-card{
  height:100%;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-card);
  transition:transform .25s ease,box-shadow .25s ease;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card-hover);}
.scene-card .thumb{
  overflow:hidden;
  border-bottom:1px solid var(--c-border);
}
.scene-card .thumb img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .3s ease;
}
.scene-card:hover .thumb img{transform:scale(1.03);}
.scene-card .body{padding:24px 24px 26px;}
.scene-card h3{
  font-size:20px;
  font-weight:600;
  line-height:1.5;
}
.scene-card p{
  margin-top:12px;
  font-size:15px;
  line-height:1.85;
  color:var(--c-text-2);
}
.scene-card .body .text-link{margin-top:16px;}

/* ================= 数据条 ================= */
.stats-band{
  background:var(--c-primary-50);
  padding:48px 0;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
}
.stat-item{
  padding:6px 24px;
  border-right:1px solid rgba(23,83,155,.14);
}
.stat-item:last-child{border-right:0;}
.stat-item:first-child{padding-left:0;}
.stat-item .num{
  font-size:40px;
  line-height:1.1;
  font-weight:600;
  color:var(--c-primary);
  display:flex;
  align-items:baseline;
  gap:6px;
}
.stat-item .num small{font-size:16px;font-weight:600;color:var(--c-primary-700);}
.stat-item .label{
  margin-top:10px;
  font-size:14px;
  color:var(--c-text-3);
  line-height:1.7;
}

/* ================= FAQ ================= */
.faq-accordion{
  border-top:1px solid var(--c-border);
}
.faq-accordion .accordion-item{
  border-bottom:1px solid var(--c-border);
  background:transparent;
}
.faq-accordion .accordion-title{
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:22px 40px 22px 0;
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  color:var(--c-text);
  border:0;
  background:transparent;
  position:relative;
}
.faq-accordion .accordion-title::after{
  content:"+";
  position:absolute;
  right:6px;
  top:20px;
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--c-primary);
  transition:transform .2s ease,color .2s ease;
}
.faq-accordion .accordion-title[aria-expanded="true"],
.faq-accordion .accordion-title:hover{color:var(--c-primary);}
.faq-accordion .accordion-title[aria-expanded="true"]::after{
  content:"×";
  transform:rotate(90deg);
  color:var(--c-accent);
}
.faq-accordion .accordion-content{
  padding:0 60px 24px 0;
  border:0;
  background:transparent;
  color:var(--c-text-2);
}
.faq-accordion .accordion-content p{
  font-size:15px;
  line-height:1.9;
}

/* ================= CTA 条 ================= */
.cta-band{
  background:var(--c-primary-50);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
  padding:48px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-text h2{
  font-size:24px;
  font-weight:600;
  line-height:1.4;
}
.cta-text p{
  margin-top:10px;
  font-size:15px;
  color:var(--c-text-2);
  max-width:640px;
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ================= 页脚 ================= */
.site-footer{
  background:var(--c-primary-700);
  color:#fff;
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-col h3{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col li{font-size:14px;line-height:1.7;color:rgba(255,255,255,.78);}
.footer-col a{color:rgba(255,255,255,.78);}
.footer-col a:hover,.footer-col a:focus{color:#fff;text-decoration:underline;}
.footer-brand .brand{color:#fff;margin-bottom:16px;}
.footer-brand .brand:hover,.footer-brand .brand:focus{color:#fff;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.65);}
.footer-brand p{
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.78);
  max-width:340px;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;
  color:rgba(255,255,255,.7);
}

/* ================= 响应式 ================= */
@media (max-width:1023px){
  .container{padding:0 20px;}
  .section{padding:72px 0;}
  .main-wrap{padding:56px 0 72px;}
  .page-hero h1{font-size:32px;}
  .page-hero-lead{font-size:16px;}
  .page-hero-inner{padding:44px 0 48px;}
  .page-hero-media{margin-top:32px;}
  .longform{padding:34px 30px;}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow-item:nth-child(2n){border-right:0;}
  .flow-item{padding:22px 20px 22px 0;}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:28px;}
  .stat-item{padding:0 20px;border-right:0;border-left:1px solid rgba(23,83,155,.14);}
  .stat-item:nth-child(odd){border-left:0;padding-left:0;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .anchor-nav{position:static;margin-bottom:28px;}
  .anchor-nav ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));}
  .anchor-nav li+li{border-top:0;}
  .anchor-nav a{border-left:2px solid transparent;}
  .point-list{grid-template-columns:1fr;}

  .nav-toggle{display:flex;}
  .nav-panel{
    position:fixed;
    top:70px;
    left:0;
    right:0;
    bottom:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    padding:8px 20px 32px;
    background:#fff;
    border-top:1px solid var(--c-border);
    overflow-y:auto;
    display:none;
  }
  .nav-panel.is-open{display:flex;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu a{
    height:52px;
    padding:0 4px;
    font-size:16px;
    border-bottom:1px solid var(--c-border);
  }
  .nav-menu a::after{display:none;}
  .nav-menu a.is-active{background:var(--c-primary-50);padding-left:12px;border-radius:6px;}
  .nav-cta{margin-top:20px;}
  .nav-cta .btn{width:100%;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-head h2{font-size:23px;}
  .page-hero h1{font-size:28px;}
  .page-hero::before{display:none;}
  .longform{padding:26px 20px;}
  .longform-block{padding-top:32px;margin-top:32px;}
  .longform-block h2{font-size:20px;}
  .flow-grid{grid-template-columns:1fr;}
  .flow-item{border-right:0;padding-right:0;border-bottom:1px solid var(--c-border);}
  .flow-item:last-child{border-bottom:0;}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-item .num{font-size:32px;}
  .anchor-nav ul{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-text h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .faq-accordion .accordion-title{font-size:16px;padding-right:34px;}
  .faq-accordion .accordion-content{padding-right:0;}
}

/* roulang page: category3 */
:root{
  --c-primary:#17539B;
  --c-primary-700:#103E76;
  --c-primary-50:#EAF1FA;
  --c-accent:#D9822B;
  --c-accent-700:#B96A1F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-border:#E4EAF2;
  --c-text:#1C2530;
  --c-text-2:#4A5568;
  --c-text-3:#7C8794;
  --c-success:#0E8C6E;
  --c-error:#C0392B;
  --r-card:10px;
  --r-btn:8px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 8px 24px rgba(23,83,155,.08);
  --sh-card-h:0 14px 32px rgba(23,83,155,.14);
  --sh-nav:0 2px 12px rgba(23,83,155,.06);
  --sp-8:8px; --sp-12:12px; --sp-16:16px; --sp-24:24px;
  --sp-32:32px; --sp-48:48px; --sp-64px:64px; --sp-88:88px;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-accent);}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid rgba(23,83,155,.4);
  outline-offset:2px;
}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
.container{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 24px;
}
/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-nav);}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:70px;
  gap:var(--sp-24);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--c-primary);
}
.brand:hover{color:var(--c-primary);}
.brand-mark{
  width:14px;height:14px;
  border-radius:3px;
  background:var(--c-primary);
  box-shadow:6px 6px 0 -2px var(--c-accent);
  flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:20px;font-weight:600;letter-spacing:.5px;}
.brand-sub{font-size:12px;color:var(--c-text-3);font-weight:400;letter-spacing:.6px;}
.nav-panel{
  display:flex;
  align-items:center;
  gap:var(--sp-32);
  flex:1;
  justify-content:flex-end;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:28px;
}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  color:var(--c-text-2);
  font-weight:500;
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transition:transform .22s ease;
}
.nav-menu a:hover{color:var(--c-primary);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.is-active{color:var(--c-primary);font-weight:600;}
.nav-menu a.is-active::after{transform:scaleX(1);}
.nav-cta{display:flex;align-items:center;gap:var(--sp-12);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--c-border);
  border-radius:var(--r-btn);
  background:var(--c-surface);
  padding:0;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--c-primary);
  border-radius:2px;
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{
  background:var(--c-accent);
  color:#fff;
  border-color:var(--c-accent);
}
.btn-primary:hover{
  background:var(--c-accent-700);
  border-color:var(--c-accent-700);
  color:#fff;
  transform:translateY(-1px);
}
.btn-outline{
  background:var(--c-surface);
  color:var(--c-primary);
  border-color:var(--c-primary);
}
.btn-outline:hover{
  background:var(--c-primary-50);
  color:var(--c-primary);
}
.btn-text{
  color:var(--c-primary);
  font-weight:600;
  font-size:15px;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.btn-text i{font-size:12px;transition:transform .2s ease;}
.btn-text:hover i{transform:translateX(3px);}
/* ---------- 页面头 ---------- */
.page-hero{
  position:relative;
  background:var(--c-primary-50);
  border-bottom:1px solid var(--c-border);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  top:0;right:-60px;
  width:420px;height:100%;
  background:linear-gradient(100deg,rgba(23,83,155,.10),rgba(23,83,155,0));
  transform:skewX(-8deg);
  pointer-events:none;
}
.page-hero-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-48);
  padding:64px 0 60px;
  min-height:232px;
}
.page-hero-copy{max-width:640px;}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-text-3);
  margin-bottom:18px;
}
.crumb a{color:var(--c-text-3);}
.crumb a:hover{color:var(--c-primary);}
.crumb li::after{content:"/";margin-left:8px;color:#C4CEDB;}
.crumb li:last-child::after{content:"";}
.crumb li:last-child{color:var(--c-primary);font-weight:600;}
.page-hero h1{
  font-size:40px;
  line-height:1.3;
  font-weight:600;
  color:var(--c-primary-700);
  letter-spacing:0;
}
.page-hero p{
  margin-top:16px;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text-2);
  max-width:600px;
}
.page-hero-media{
  flex:0 0 320px;
  max-width:320px;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid rgba(23,83,155,.12);
  box-shadow:var(--sh-card);
}
.page-hero-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:1.5px;
  color:var(--c-accent);
  margin-bottom:12px;
}
.section-head h2{
  font-size:30px;
  line-height:1.35;
  font-weight:600;
  color:var(--c-text);
}
.section-head p{
  margin-top:14px;
  color:var(--c-text-2);
  font-size:16px;
}
/* ---------- 问题卡片网格 ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.q-card{
  position:relative;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:32px 32px 28px;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  display:flex;
  flex-direction:column;
}
.q-card::before{
  content:"";
  position:absolute;
  left:0;top:32px;bottom:32px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--c-primary);
  opacity:.85;
}
.q-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-card-h);
  border-color:#CDDDF0;
}
.q-card-top{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.q-num{
  flex:0 0 auto;
  width:34px;height:34px;
  border-radius:6px;
  background:var(--c-primary-50);
  color:var(--c-primary);
  font-size:13px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  letter-spacing:.5px;
}
.q-card h3{
  font-size:20px;
  line-height:1.5;
  font-weight:600;
  color:var(--c-text);
}
.q-card p{
  color:var(--c-text-2);
  font-size:15.5px;
  margin-bottom:16px;
}
.q-points{
  margin-bottom:20px;
  border-top:1px solid var(--c-border);
  padding-top:16px;
}
.q-points li{
  position:relative;
  padding-left:18px;
  font-size:14.5px;
  color:var(--c-text-2);
  line-height:1.8;
  margin-bottom:8px;
}
.q-points li:last-child{margin-bottom:0;}
.q-points li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--c-primary);
  opacity:.55;
}
.q-card .btn-text{margin-top:auto;}
/* ---------- 主题标签区 ---------- */
.topic-band{
  background:var(--c-surface);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
}
.topic-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;
}
.topic-item{
  padding:8px 28px;
  border-right:1px solid var(--c-border);
}
.topic-item:last-child{border-right:none;}
.topic-item h3{
  font-size:17px;
  font-weight:600;
  color:var(--c-text);
  margin-bottom:8px;
  display:flex;
  align-items:center;
  gap:8px;
}
.topic-item h3 i{color:var(--c-primary);font-size:15px;}
.topic-item p{
  font-size:14.5px;
  color:var(--c-text-2);
  line-height:1.8;
}
.badge{
  display:inline-block;
  background:var(--c-primary-50);
  color:var(--c-primary);
  font-size:12px;
  border-radius:var(--r-pill);
  padding:4px 10px;
  line-height:1.5;
  font-weight:500;
}
/* ---------- 排查流程（图文） ---------- */
.flow-wrap{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:56px;
  align-items:center;
}
.flow-image{
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--c-border);
  box-shadow:var(--sh-card);
}
.flow-image img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .35s ease;
}
.flow-image:hover img{transform:scale(1.03);}
.flow-steps{counter-reset:flow;}
.flow-steps li{
  position:relative;
  padding:0 0 24px 56px;
  border-left:1px solid var(--c-border);
  margin-left:16px;
}
.flow-steps li:last-child{border-left-color:transparent;padding-bottom:0;}
.flow-steps li::before{
  counter-increment:flow;
  content:"0" counter(flow);
  position:absolute;
  left:-17px;top:0;
  width:34px;height:34px;
  border-radius:6px;
  background:var(--c-primary);
  color:#fff;
  font-size:13px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.flow-steps h3{
  font-size:17px;
  font-weight:600;
  color:var(--c-text);
  margin-bottom:6px;
}
.flow-steps p{
  font-size:15px;
  color:var(--c-text-2);
}
/* ---------- FAQ 手风琴 ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:56px;
  align-items:start;
}
.faq-aside{position:sticky;top:104px;}
.faq-aside h2{
  font-size:30px;
  line-height:1.35;
  font-weight:600;
}
.faq-aside p{
  margin-top:14px;
  color:var(--c-text-2);
  font-size:15.5px;
}
.faq-aside .btn-text{margin-top:20px;}
.accordion{
  margin:0;
  border:none;
  background:transparent;
}
.accordion .accordion-item{
  border:none;
  border-top:1px solid var(--c-border);
  background:transparent;
}
.accordion .accordion-item:last-child{border-bottom:1px solid var(--c-border);}
.accordion .accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 0;
  font-size:17px;
  font-weight:600;
  color:var(--c-text);
  border:none;
  background:transparent;
  line-height:1.6;
}
.accordion .accordion-title:hover,
.accordion .accordion-title:focus{
  background:transparent;
  color:var(--c-primary);
}
.accordion .accordion-title::before{
  content:"+";
  order:2;
  flex:0 0 auto;
  width:26px;height:26px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  border:1px solid var(--c-border);
  color:var(--c-primary);
  font-size:16px;
  font-weight:400;
  line-height:1;
  transition:transform .2s ease,background .2s ease;
}
.accordion .accordion-item.is-active .accordion-title::before{
  content:"×";
  transform:rotate(180deg);
  background:var(--c-primary-50);
}
.accordion .accordion-content{
  padding:0 0 22px;
  border:none;
  background:transparent;
  font-size:15px;
  line-height:1.9;
  color:var(--c-text-3);
}
.accordion .accordion-content p{margin-bottom:10px;}
.accordion .accordion-content p:last-child{margin-bottom:0;}
/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-primary-50);
  border:1px solid #D6E3F4;
  border-radius:var(--r-card);
  padding:40px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-band h2{
  font-size:24px;
  font-weight:600;
  color:var(--c-primary-700);
}
.cta-band p{
  margin-top:10px;
  color:var(--c-text-2);
  font-size:15.5px;
  max-width:640px;
}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;}
/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-primary-700);
  color:#fff;
  padding:72px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-col h3{
  font-size:16px;
  font-weight:600;
  margin-bottom:18px;
  color:#fff;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{
  color:rgba(255,255,255,.78);
  font-size:14.5px;
}
.footer-col a:hover{color:#fff;}
.footer-brand .brand{color:#fff;}
.footer-brand .brand:hover{color:#fff;}
.footer-brand .brand-mark{background:#fff;box-shadow:6px 6px 0 -2px var(--c-accent);}
.footer-brand .brand-sub{color:rgba(255,255,255,.6);}
.footer-brand p{
  margin-top:18px;
  font-size:14.5px;
  line-height:1.9;
  color:rgba(255,255,255,.78);
  max-width:340px;
}
.footer-bottom{
  margin-top:56px;
  border-top:1px solid rgba(255,255,255,.14);
  padding:22px 0 26px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  font-size:13px;
  color:rgba(255,255,255,.7);
  flex-wrap:wrap;
}
/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .section{padding:72px 0;}
  .section-tight{padding:56px 0;}
  .page-hero h1{font-size:32px;}
  .section-head h2,.faq-aside h2{font-size:26px;}
  .nav-toggle{display:flex;}
  .nav-panel{
    position:absolute;
    top:100%;left:0;right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:var(--c-surface);
    border-bottom:1px solid var(--c-border);
    box-shadow:var(--sh-nav);
    padding:8px 0 16px;
  }
  .nav-panel.is-open{display:flex;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu a{
    height:52px;
    display:flex;
    align-items:center;
    padding:0 24px;
    border-bottom:1px solid var(--c-border);
    font-size:16px;
  }
  .nav-menu a::after{display:none;}
  .nav-menu a.is-active{background:var(--c-primary-50);}
  .nav-cta{padding:16px 24px 0;}
  .nav-cta .btn{width:100%;}
  .nav-wrap{position:relative;}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .topic-item{padding:20px 24px;border-right:none;border-bottom:1px solid var(--c-border);}
  .topic-item:nth-child(odd){border-right:1px solid var(--c-border);}
  .topic-item:nth-last-child(-n+2){border-bottom:none;}
  .flow-wrap{grid-template-columns:1fr;gap:40px;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .faq-aside{position:static;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .page-hero-inner{padding:48px 0;}
  .page-hero-media{flex:0 0 240px;max-width:240px;}
}
@media screen and (max-width:640px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .page-hero-inner{
    flex-direction:column;
    align-items:flex-start;
    gap:28px;
    min-height:0;
    padding:40px 0;
  }
  .page-hero-media{flex:0 0 auto;max-width:100%;width:100%;}
  .page-hero h1{font-size:28px;}
  .section-head h2,.faq-aside h2{font-size:23px;}
  .card-grid{grid-template-columns:1fr;}
  .q-card{padding:26px 22px 24px;}
  .topic-grid{grid-template-columns:1fr;}
  .topic-item{border-right:none !important;border-bottom:1px solid var(--c-border);}
  .topic-item:last-child{border-bottom:none;}
  .cta-band{
    flex-direction:column;
    align-items:flex-start;
    padding:28px 24px;
  }
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .flow-steps li{padding-left:48px;}
  .accordion .accordion-title{font-size:16px;padding:18px 0;}
}