/* roulang page: index */
:root{
  --primary:#2563D9;
  --primary-dark:#1B4FA8;
  --primary-soft:#EAF1FE;
  --teal:#0FAE9B;
  --amber:#F2A33A;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --text:#14243A;
  --muted:#5B6B80;
  --border:#E2E8F0;
  --success:#16A34A;
  --warn:#D97706;
  --err:#DC2626;
  --r-card:14px;
  --r-btn:10px;
  --sh-card:0 6px 18px rgba(20,36,58,.06);
  --sh-hover:0 12px 28px rgba(20,36,58,.12);
  --sidebar-w:248px;
  --topbar-h:56px;
  --sec:80px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif;
  font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.32;color:var(--text)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-dark)}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 侧边 App Shell ---------- */
.shell-sidebar{
  position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
  background:var(--surface);border-right:1px solid var(--border);
  display:flex;flex-direction:column;gap:20px;padding:22px 16px 18px;
  z-index:70;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:12px;padding:4px 8px 16px;border-bottom:1px solid var(--border)}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;
  box-shadow:0 8px 18px rgba(37,99,217,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.5px}
.brand-text small{font-size:12px;color:var(--muted);margin-top:3px}
.side-nav{display:flex;flex-direction:column;gap:6px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;padding:0 14px;
  border-radius:10px;color:var(--text);font-size:15px;font-weight:500;transition:.2s ease;
}
.nav-item i{width:18px;text-align:center;color:var(--muted);font-size:15px;transition:color .2s}
.nav-item:hover{background:var(--primary-soft);color:var(--primary-dark)}
.nav-item:hover i{color:var(--primary)}
.nav-item.is-active{background:var(--primary-soft);color:var(--primary-dark);font-weight:600}
.nav-item.is-active i{color:var(--primary)}
.nav-item.is-active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--primary)}
.side-cta{
  margin-top:auto;background:#F1F6FE;border:1px solid #DCE7FA;border-radius:var(--r-card);
  padding:16px;display:flex;flex-direction:column;gap:10px;
}
.side-cta h4{font-size:15px;line-height:1.5}
.side-cta p{font-size:13px;color:var(--muted);line-height:1.7}
.side-cta .btn{width:100%;height:42px;font-size:14px}
.side-foot{font-size:12px;color:var(--muted);line-height:1.7;padding:0 8px}
.side-foot a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.side-foot a:hover{color:var(--primary)}

/* ---------- 移动端顶栏 ---------- */
.shell-topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:var(--topbar-h);
  background:var(--surface);border-bottom:1px solid var(--border);z-index:80;
  align-items:center;justify-content:space-between;padding:0 16px;
}
.topbar-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:var(--text)}
.topbar-brand span{
  width:30px;height:30px;border-radius:9px;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;
}
.hamburger{
  width:42px;height:42px;border:1px solid var(--border);border-radius:10px;background:#fff;
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.2s}
.hamburger:focus-visible{outline:3px solid rgba(37,99,217,.25);outline-offset:2px}
.shell-mask{
  position:fixed;inset:0;background:rgba(20,36,58,.45);z-index:65;opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}
.shell-mask.is-open{opacity:1;visibility:visible}

/* ---------- 主内容 ---------- */
.shell-main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.shell-main main{flex:1 1 auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;transition:all .22s ease;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(37,99,217,.24)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(37,99,217,.3)}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--border)}
.btn-ghost:hover{background:var(--primary-soft);border-color:#C7D8F7;color:var(--primary-dark)}
.btn:focus-visible{outline:3px solid rgba(37,99,217,.25);outline-offset:2px}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.text-link i{font-size:12px;transition:transform .2s ease}
.text-link:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:4px}
.text-link:hover i{transform:translateX(3px)}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec) 0}
.section-alt{background:var(--surface)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:32px;letter-spacing:.2px}
.section-head p{margin-top:14px;font-size:16px;color:var(--muted);line-height:1.8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-dark);font-size:13px;font-weight:600;letter-spacing:.4px;
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--primary-soft);color:var(--primary-dark);
}
.badge-soft{background:#EAF7F4;color:#0B7F70}
.badge-amber{background:#FEF3E2;color:#B7701B}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(180deg,#F2F6FD 0%,#FFFFFF 78%);border-bottom:1px solid var(--border);padding:96px 0 84px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-140px;right:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(37,99,217,.12),rgba(37,99,217,0) 68%);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:linear-gradient(90deg,rgba(37,99,217,.22),rgba(37,99,217,0));
}
.hero-inner{position:relative;z-index:2}
.hero-title{font-size:44px;line-height:1.26;margin-top:20px;letter-spacing:-.3px}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--muted);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.trust-list li{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--border);font-size:13px;color:var(--text);font-weight:500;
  box-shadow:0 2px 8px rgba(20,36,58,.04);
}
.trust-list i{color:var(--teal);font-size:14px}
.hero-media{position:relative}
.hero-media img{
  width:100%;height:430px;object-fit:cover;border-radius:16px;
  box-shadow:0 18px 40px rgba(20,36,58,.14);border:1px solid rgba(255,255,255,.7);
}
.hero-media-tag{
  position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.94);border-radius:12px;
  padding:10px 16px;font-size:13px;font-weight:600;color:var(--primary-dark);
  box-shadow:0 8px 20px rgba(20,36,58,.14);backdrop-filter:blur(4px);
}

/* ---------- 问题卡 ---------- */
.prob-card{
  height:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-card);transition:transform .22s ease,box-shadow .22s ease;
}
.prob-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.prob-icon{
  width:44px;height:44px;border-radius:12px;background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px;
}
.prob-card h3{font-size:18px;line-height:1.5}
.prob-card p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- 方案卡 ---------- */
.feature-main{
  height:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-card);transition:transform .22s ease,box-shadow .22s ease;
  display:flex;flex-direction:column;
}
.feature-main:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.feature-main-media{height:250px;overflow:hidden}
.feature-main-media img{width:100%;height:100%;object-fit:cover}
.feature-main-body{padding:26px 26px 28px;display:flex;flex-direction:column;gap:12px}
.feature-main-body h3{font-size:22px;line-height:1.5}
.feature-main-body p{font-size:15px;line-height:1.8;color:var(--muted)}
.stack{display:flex;flex-direction:column;gap:16px;height:100%}
.feature-mini{
  flex:1 1 auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px 22px;box-shadow:var(--sh-card);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;gap:16px;align-items:flex-start;
}
.feature-mini:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#CFDDF5}
.feature-mini .mini-icon{
  width:40px;height:40px;flex:0 0 40px;border-radius:11px;background:#EAF7F4;color:#0B7F70;
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.feature-mini h3{font-size:17px;line-height:1.5}
.feature-mini p{margin-top:8px;font-size:14px;line-height:1.7;color:var(--muted)}
.feature-mini .text-link{margin-top:10px}

/* ---------- 数据带 ---------- */
.stats-band{background:#EFF5FE;border-top:1px solid #DCE7FA;border-bottom:1px solid #DCE7FA;padding:64px 0}
.stats-band .section-head{margin-bottom:32px}
.stat{
  background:#fff;border:1px solid #DCE7FA;border-radius:var(--r-card);padding:26px 22px;
  box-shadow:0 4px 14px rgba(37,99,217,.06);height:100%;
}
.stat-num{font-size:40px;font-weight:700;color:var(--primary);line-height:1;letter-spacing:-1px}
.stat-num small{font-size:16px;font-weight:600;margin-left:4px;color:var(--primary-dark)}
.stat-label{margin-top:12px;font-size:14px;color:var(--muted);line-height:1.6}

/* ---------- 最新信息 ---------- */
.news-card{
  display:flex;gap:18px;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r-card);padding:16px;box-shadow:var(--sh-card);height:100%;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;color:var(--text);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#CFDDF5;color:var(--text)}
.news-thumb{flex:0 0 132px;height:112px;border-radius:12px;overflow:hidden;background:#EDF1F7}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{display:flex;flex-direction:column;gap:8px;min-width:0}
.news-body .badge{align-self:flex-start}
.news-title{font-size:17px;font-weight:600;line-height:1.55;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-title{color:var(--primary-dark)}
.news-desc{font-size:14px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;font-size:13px;color:#8A98AB;display:flex;align-items:center;gap:8px}
.news-meta::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);display:inline-block}
.empty-state{
  background:var(--surface);border:1px dashed #CFD9E8;border-radius:var(--r-card);
  padding:52px 24px;text-align:center;color:var(--muted);
}
.empty-state i{font-size:34px;color:#B9C6D8;margin-bottom:14px;display:block}
.empty-state p{font-size:15px;line-height:1.8}
.empty-state a{display:inline-block;margin-top:12px;font-size:14px;font-weight:600}

/* ---------- FAQ ---------- */
.accordion{border:none;background:transparent;margin:0}
.accordion .accordion-item{
  border:1px solid var(--border);border-radius:var(--r-card);background:#fff;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-card);
}
.accordion .accordion-title{
  padding:20px 58px 20px 22px;font-size:16px;font-weight:600;color:var(--text);
  border:none;background:#fff;position:relative;line-height:1.6;transition:background .2s ease,color .2s ease;
}
.accordion .accordion-title:hover{background:var(--primary-soft);color:var(--primary-dark)}
.accordion .accordion-title::before{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--primary);margin:0;width:auto;height:auto;line-height:1;
}
.accordion .accordion-item.is-active .accordion-title{color:var(--primary-dark)}
.accordion .accordion-item.is-active .accordion-title::before{content:"\2212"}
.accordion .accordion-content{
  padding:0 22px 22px;border:none;background:#fff;color:var(--muted);font-size:15px;line-height:1.85;
}
.accordion .accordion-content p{margin:0}

/* ---------- CTA 区 ---------- */
.cta-band{
  background:var(--primary);border-radius:18px;padding:52px 48px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  box-shadow:0 18px 40px rgba(37,99,217,.24);
}
.cta-band h2{font-size:30px;color:#fff;line-height:1.4}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.86);max-width:620px}
.cta-band .btn-primary{background:#fff;color:var(--primary-dark);box-shadow:0 8px 20px rgba(11,32,74,.2)}
.cta-band .btn-primary:hover{background:#F2F6FD;color:var(--primary-dark);transform:translateY(-1px)}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff}

/* ---------- 隐私说明 ---------- */
.privacy-note{
  margin-top:24px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:16px 22px;font-size:13px;color:var(--muted);
}
.privacy-note summary{cursor:pointer;font-weight:600;color:var(--text);font-size:14px;list-style:none}
.privacy-note summary::-webkit-details-marker{display:none}
.privacy-note summary::before{content:"\f059";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--primary);margin-right:8px}
.privacy-note p{margin-top:12px;line-height:1.85}

/* ---------- 表单弹层 ---------- */
.modal{
  position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:24px;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.modal.is-open{opacity:1;visibility:visible}
.modal-backdrop{position:absolute;inset:0;background:rgba(20,36,58,.58)}
.modal-panel{
  position:relative;background:#fff;border-radius:16px;width:100%;max-width:560px;padding:32px;
  box-shadow:0 24px 60px rgba(20,36,58,.26);max-height:90vh;overflow-y:auto;
  transform:translateY(14px);transition:transform .25s ease;
}
.modal.is-open .modal-panel{transform:translateY(0)}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:6px}
.modal-head h3{font-size:22px;line-height:1.4}
.modal-head p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.7}
.modal-close{
  flex:0 0 36px;width:36px;height:36px;border-radius:10px;border:1px solid var(--border);background:#fff;
  color:var(--muted);cursor:pointer;font-size:16px;transition:.2s;
}
.modal-close:hover{background:var(--bg);color:var(--text)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.field{display:flex;flex-direction:column;gap:6px}
.field-full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600;color:var(--text)}
.req{color:var(--err);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:var(--r-btn);
  background:#fff;color:var(--text);font-size:15px;line-height:1.5;transition:border-color .2s,box-shadow .2s;
}
.field textarea{resize:vertical;min-height:96px}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,217,.16);
}
.field input:invalid:not(:placeholder-shown){border-color:var(--err)}
.check-row{display:flex;align-items:flex-start;gap:10px;margin-top:18px;font-size:13px;color:var(--muted);line-height:1.7}
.check-row input{margin-top:4px;width:16px;height:16px;flex:0 0 16px;accent-color:var(--primary)}
.form-actions{margin-top:22px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.form-actions .btn{flex:1 1 auto}
.form-note{margin-top:12px;font-size:12px;color:#8A98AB;line-height:1.7}
.form-ok{
  display:none;margin-top:16px;background:#EAF7F0;border:1px solid #C6E9D6;color:#0F7A44;
  border-radius:var(--r-btn);padding:12px 16px;font-size:14px;
}
.form-ok.is-visible{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:#EEF2F8;border-top:1px solid var(--border);padding:56px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand span{
  width:38px;height:38px;border-radius:11px;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;
}
.footer-brand strong{font-size:17px;color:var(--text)}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col p{font-size:14px;line-height:1.85;color:var(--muted)}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid #DDE4EE;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8391A5;
}
.footer-bottom a{color:#8391A5;text-decoration:underline;text-underline-offset:3px}
.footer-bottom a:hover{color:var(--primary)}
.footer-privacy{margin-top:14px;font-size:12px;color:#96A2B4;line-height:1.8}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:1023px){
  :root{--sec:64px}
  body{padding-top:var(--topbar-h)}
  .shell-topbar{display:flex}
  .shell-sidebar{
    width:280px;transform:translateX(-100%);transition:transform .28s ease;
    box-shadow:0 0 40px rgba(20,36,58,.18);padding-top:20px;
  }
  .shell-sidebar.is-open{transform:translateX(0)}
  .shell-main{margin-left:0}
  .hero{padding:64px 0 56px}
  .hero-title{font-size:36px}
  .hero-media img{height:340px;margin-top:32px}
  .section-head h2{font-size:28px}
  .cta-band{padding:40px 32px}
  .cta-band h2{font-size:26px}
}
@media (max-width:767px){
  :root{--sec:48px}
  .container{padding:0 16px}
  .hero{padding:52px 0 48px}
  .hero-title{font-size:29px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
  .hero-media img{height:250px}
  .section-head{margin-bottom:28px}
  .section-head h2{font-size:24px}
  .stats-band{padding:48px 0}
  .stat-num{font-size:34px}
  .news-card{flex-direction:column}
  .news-thumb{flex:none;width:100%;height:160px}
  .cta-band{padding:32px 22px;border-radius:16px}
  .cta-band h2{font-size:23px}
  .cta-band .btn{width:100%}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .modal{align-items:flex-end;padding:0}
  .modal-panel{border-radius:18px 18px 0 0;max-height:92vh;padding:24px 20px 28px;transform:translateY(100%)}
  .modal.is-open .modal-panel{transform:translateY(0)}
  .hero-title{font-size:26px}
  .accordion .accordion-title{font-size:15px;padding:18px 50px 18px 18px}
}

/* roulang page: article */
:root{
  --primary:#2563D9;
  --primary-dark:#1B4FA8;
  --accent:#0FAE9B;
  --amber:#F2A33A;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --text:#14243A;
  --text-soft:#233247;
  --muted:#5B6B80;
  --border:#E2E8F0;
  --success:#16A34A;
  --warn:#D97706;
  --danger:#DC2626;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-lg:20px;
  --shadow-1:0 6px 18px rgba(20,36,58,.06);
  --shadow-2:0 12px 28px rgba(20,36,58,.12);
  --shell-w:248px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background:var(--bg);
}
img{display:block;max-width:100%;border-radius:12px;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease;}
a:hover{color:var(--primary-dark);}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--text);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(37,99,217,.25);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ========== 左侧 App Shell ========== */
.shell-sidebar{
  position:fixed;
  left:0;top:0;bottom:0;
  width:var(--shell-w);
  background:var(--surface);
  border-right:1px solid var(--border);
  padding:22px 16px 20px;
  display:flex;
  flex-direction:column;
  gap:20px;
  overflow-y:auto;
  z-index:80;
}
.shell-logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text);padding:0 6px;}
.shell-logo .mark{
  width:34px;height:34px;flex:none;border-radius:10px;
  background:linear-gradient(135deg,#2563D9,#1B4FA8);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;
}
.shell-logo:hover{color:var(--primary-dark);}
.shell-nav{display:flex;flex-direction:column;gap:4px;}
.nav-label{font-size:12px;color:var(--muted);padding:6px 12px 4px;letter-spacing:.06em;}
.nav-item{
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;
  border-radius:10px;
  border-left:3px solid transparent;
  color:var(--text);font-size:15px;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.nav-item i{width:18px;text-align:center;color:var(--muted);transition:color .2s ease;}
.nav-item:hover{background:#EEF3FC;color:var(--primary-dark);}
.nav-item:hover i{color:var(--primary);}
.nav-item.active{
  background:#E8F0FE;color:var(--primary-dark);
  border-left-color:var(--primary);font-weight:600;
}
.nav-item.active i{color:var(--primary);}
.shell-cta{
  margin-top:auto;
  background:linear-gradient(150deg,#EEF3FF,#F5FAFF);
  border:1px solid #D7E3F8;
  border-radius:var(--radius-card);
  padding:16px;
}
.shell-cta h4{font-size:15px;margin-bottom:6px;}
.shell-cta p{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:12px;}
.shell-cta .btn{width:100%;justify-content:center;height:40px;font-size:14px;}

/* ========== 移动端顶栏 ========== */
.shell-topbar{
  display:none;
  position:sticky;top:0;z-index:75;
  height:56px;align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  backdrop-filter:saturate(150%) blur(6px);
}
.topbar-brand{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:700;color:var(--text);}
.topbar-brand span{
  width:28px;height:28px;border-radius:9px;flex:none;
  background:linear-gradient(135deg,#2563D9,#1B4FA8);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;
}
.hamburger{
  width:42px;height:38px;border:1px solid var(--border);background:#fff;border-radius:10px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:0;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.22s ease;}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.shell-backdrop{
  display:none;position:fixed;inset:0;background:rgba(20,36,58,.42);z-index:78;
}
.shell-backdrop.is-show{display:block;}

/* ========== 主内容 ========== */
.shell-content{margin-left:var(--shell-w);min-height:100vh;display:flex;flex-direction:column;}
.shell-content > main{flex:1 1 auto;}

/* ========== 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(37,99,217,.28);}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--text);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn-light{background:#fff;color:var(--primary-dark);}
.btn-light:hover{background:#F2F6FF;color:var(--primary-dark);transform:translateY(-2px);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

/* ========== 通用板块 ========== */
.section{padding:72px 0;}
.section-alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.section-title{font-size:30px;line-height:1.35;margin-bottom:12px;}
.section-desc{font-size:15px;color:var(--muted);max-width:760px;margin-bottom:32px;line-height:1.8;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  background:#E8F0FE;color:var(--primary-dark);
  font-size:13px;font-weight:600;margin-bottom:14px;
}

/* ========== 文章头部 ========== */
.article-hero{
  background:linear-gradient(180deg,#EFF4FF 0%,#F6F8FB 100%);
  border-bottom:1px solid var(--border);
  padding:56px 0 72px;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:#C3CDDA;}
.crumb .current{color:var(--text);}
.article-hero h1{
  font-size:40px;line-height:1.3;margin-bottom:18px;max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  font-size:13.5px;color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:#9AA9BC;}

/* ========== 封面 ========== */
.cover-wrap{max-width:980px;margin:-44px auto 0;padding:0 24px;position:relative;z-index:2;}
.cover-wrap img{
  width:100%;height:360px;object-fit:cover;
  border-radius:16px;
  border:1px solid var(--border);
  box-shadow:var(--shadow-2);
  background:#E9EEF6;
}

/* ========== 正文 ========== */
.article-section{padding:56px 0 24px;}
.article-layout{max-width:820px;margin:0 auto;}
.article-content{font-size:16.5px;line-height:1.9;color:var(--text-soft);}
.article-content p{margin:0 0 18px;}
.article-content h2{font-size:26px;line-height:1.4;margin:48px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--border);}
.article-content h3{font-size:20px;line-height:1.5;margin:32px 0 12px;font-weight:600;}
.article-content h4{font-size:17px;margin:24px 0 10px;}
.article-content ul,.article-content ol{margin:0 0 18px;padding-left:24px;}
.article-content ul li{list-style:disc;margin-bottom:8px;}
.article-content ol li{list-style:decimal;margin-bottom:8px;}
.article-content li::marker{color:var(--primary);}
.article-content blockquote{
  margin:24px 0;padding:16px 22px;
  border-left:3px solid var(--primary);
  background:#F1F6FF;border-radius:0 12px 12px 0;
  color:#33465F;font-size:15.5px;
}
.article-content img{border-radius:12px;margin:22px 0;}
.article-content table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;}
.article-content th,.article-content td{border:1px solid var(--border);padding:10px 12px;text-align:left;}
.article-content th{background:#F6F8FB;color:var(--text);font-weight:600;}
.article-content a{color:var(--primary);text-decoration:underline;}
.article-content a:hover{color:var(--primary-dark);}
.article-content code{background:#F1F4F9;border-radius:6px;padding:2px 6px;font-size:14px;}

/* ========== 空状态 ========== */
.empty-state{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:48px 32px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state h2{font-size:22px;margin-bottom:12px;}
.empty-state p{color:var(--muted);margin-bottom:24px;font-size:15px;}

/* ========== 步骤卡 ========== */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.step-card{
  position:relative;background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:26px 22px;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:#E8F0FE;color:var(--primary-dark);
  font-size:15px;font-weight:700;margin-bottom:14px;
}
.step-card h3{font-size:17px;margin-bottom:8px;}
.step-card p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ========== 相关推荐 ========== */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rec-card{
  display:flex;gap:14px;align-items:flex-start;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:14px;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#CFDCF1;}
.rec-card img{width:76px;height:76px;flex:none;object-fit:cover;border-radius:10px;background:#E9EEF6;}
.rec-card .rec-body{min-width:0;display:flex;flex-direction:column;gap:6px;}
.rec-card .rec-badge{
  align-self:flex-start;font-size:12px;font-weight:600;color:var(--accent);
  background:#E6F7F5;border-radius:999px;padding:2px 10px;
}
.rec-card h3{font-size:15.5px;line-height:1.5;color:var(--text);}
.rec-card:hover h3{color:var(--primary-dark);}
.rec-card .rec-meta{font-size:12.5px;color:var(--muted);margin-top:auto;}

/* ========== CTA 区 ========== */
.cta-band{
  background:linear-gradient(135deg,#1B4FA8 0%,#2563D9 100%);
  border-radius:var(--radius-lg);
  padding:44px 40px;
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
  box-shadow:0 18px 40px rgba(27,79,168,.22);
}
.cta-band h2{color:#fff;font-size:26px;line-height:1.4;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.86);font-size:15px;max-width:620px;line-height:1.8;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.back-home{margin-top:26px;font-size:14px;}
.back-home a{color:var(--muted);}
.back-home a:hover{color:var(--primary);}

/* ========== 页脚 ========== */
.site-footer{
  margin-top:auto;
  background:#EDF2F9;
  border-top:1px solid var(--border);
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:32px;padding-bottom:32px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand span{
  width:32px;height:32px;flex:none;border-radius:10px;
  background:linear-gradient(135deg,#2563D9,#1B4FA8);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
}
.footer-brand strong{font-size:16px;color:var(--text);}
.footer-col p{font-size:13.5px;color:var(--muted);line-height:1.85;}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--text);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--muted);}
.footer-col ul a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding-top:22px;border-top:1px solid #DCE4EF;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--primary);}
.footer-privacy{margin-top:16px;font-size:12.5px;color:#7A889A;line-height:1.8;}

/* ========== 响应式 ========== */
@media (max-width:1023px){
  .shell-sidebar{
    transform:translateX(-100%);
    transition:transform .3s ease;
    box-shadow:var(--shadow-2);
  }
  .shell-sidebar.is-open{transform:translateX(0);}
  .shell-content{margin-left:0;}
  .shell-topbar{display:flex;}
  .section{padding:56px 0;}
  .article-hero{padding:40px 0 60px;}
  .article-hero h1{font-size:32px;}
  .cover-wrap{margin-top:-36px;}
  .cover-wrap img{height:280px;}
  .step-grid,.rec-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:26px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .section-title{font-size:24px;}
  .article-hero h1{font-size:28px;}
  .article-hero{padding:32px 0 52px;}
  .cover-wrap{padding:0 16px;margin-top:-32px;}
  .cover-wrap img{height:210px;border-radius:14px;}
  .article-content{font-size:16px;line-height:1.85;}
  .article-content h2{font-size:21px;margin-top:36px;}
  .article-content h3{font-size:18px;}
  .step-grid,.rec-grid{grid-template-columns:1fr;}
  .cta-band{padding:30px 22px;border-radius:16px;}
  .cta-band h2{font-size:21px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .article-content table{font-size:14px;}
  .article-content th,.article-content td{padding:8px 10px;}
}
@media (max-width:520px){
  .article-hero h1{font-size:24px;}
  .article-meta{font-size:13px;gap:8px 16px;}
}

/* roulang page: category1 */
:root{
  --primary:#2563D9;
  --primary-dark:#1B4FA8;
  --primary-soft:#EAF1FD;
  --teal:#0FAE9B;
  --teal-soft:#E6F7F4;
  --amber:#F2A33A;
  --amber-soft:#FEF4E5;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --text:#14243A;
  --muted:#5B6B80;
  --border:#E2E8F0;
  --success:#16A34A;
  --warning:#D97706;
  --danger:#DC2626;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:16px;
  --shadow-sm:0 6px 18px rgba(20,36,58,.06);
  --shadow-md:0 12px 28px rgba(20,36,58,.12);
  --sidebar-w:248px;
  --topbar-h:56px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,background-color .18s ease;}
a:hover{color:var(--primary-dark);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:none;box-shadow:0 0 0 3px rgba(37,99,217,.25);border-radius:6px;
}
h1,h2,h3,h4{font-weight:700;color:var(--text);line-height:1.35;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:80px 0;}
.section-sm{padding:56px 0;}
.section-title{font-size:32px;margin-bottom:12px;letter-spacing:.2px;}
.section-sub{font-size:15px;color:var(--muted);max-width:720px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-soft);border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
.eyebrow i{font-size:12px;}

/* ============ 顶部移动栏 ============ */
.shell-topbar{
  position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:70;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;background:var(--surface);border-bottom:1px solid var(--border);
}
.topbar-brand{
  display:flex;align-items:center;gap:8px;
  font-size:16px;font-weight:700;color:var(--text);letter-spacing:.2px;
}
.topbar-brand span{
  width:28px;height:28px;border-radius:8px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
}
.hamburger{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:var(--surface);transition:background .2s ease;
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .2s ease;}
.hamburger:hover{background:var(--primary-soft);}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 侧边 App Shell ============ */
.shell-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);z-index:80;
  background:var(--surface);border-right:1px solid var(--border);
  display:flex;flex-direction:column;padding:22px 16px;
  transform:translateX(-100%);transition:transform .28s ease;
}
.shell-sidebar.is-open{transform:translateX(0);}
.sidebar-head{padding:0 8px 20px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:17px;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
  box-shadow:0 6px 14px rgba(37,99,217,.28);flex:none;
}
.brand-text{white-space:nowrap;}
.sidebar-nav{display:flex;flex-direction:column;gap:4px;}
.nav-item{
  display:flex;align-items:center;gap:12px;height:44px;padding:0 12px;
  border-radius:10px;color:var(--muted);font-size:15px;font-weight:500;position:relative;
  transition:background-color .18s ease,color .18s ease;
}
.nav-item i{width:18px;text-align:center;font-size:15px;color:var(--muted);transition:color .18s ease;}
.nav-item:hover{background:var(--bg);color:var(--text);}
.nav-item:hover i{color:var(--primary);}
.nav-item.is-active{background:var(--primary-soft);color:var(--primary-dark);font-weight:600;}
.nav-item.is-active i{color:var(--primary);}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--primary);
}
.sidebar-cta{
  margin-top:auto;background:var(--bg);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:18px 16px;
}
.sidebar-cta-title{font-size:15px;font-weight:700;margin-bottom:6px;}
.sidebar-cta-text{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:14px;}
.shell-overlay{
  position:fixed;inset:0;background:rgba(20,36,58,.42);z-index:75;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.shell-overlay.is-visible{opacity:1;visibility:visible;}

/* ============ 主内容 ============ */
.main-wrap{margin-left:0;padding-top:var(--topbar-h);}
.page-hero{
  background:linear-gradient(180deg,#FFFFFF 0%,#F2F6FD 100%);
  border-bottom:1px solid var(--border);
  padding:44px 0 48px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb i{font-size:10px;color:#A9B4C4;}
.page-hero h1{font-size:40px;letter-spacing:.4px;margin-bottom:16px;}
.hero-lead{font-size:17px;color:var(--muted);line-height:1.9;max-width:640px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  padding:6px 14px;border-radius:999px;background:var(--surface);
  border:1px solid var(--border);color:var(--muted);
}
.tag i{color:var(--teal);font-size:12px;}
.hero-figure{
  border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--border);
  box-shadow:var(--shadow-sm);background:var(--surface);
  position:relative;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 16px;font-size:13px;color:#fff;
  background:linear-gradient(180deg,rgba(20,36,58,0) 0%,rgba(20,36,58,.78) 100%);
}

/* ============ 锚点导航 ============ */
.anchor-bar{
  position:sticky;top:var(--topbar-h);z-index:40;background:var(--surface);
  border-bottom:1px solid var(--border);box-shadow:0 3px 10px rgba(20,36,58,.04);
}
.anchor-bar .anchor-inner{display:flex;gap:8px;overflow-x:auto;padding:10px 0;scrollbar-width:thin;}
.anchor-bar a{
  flex:none;font-size:14px;font-weight:600;color:var(--muted);
  padding:8px 16px;border-radius:999px;background:var(--bg);border:1px solid transparent;
  transition:all .18s ease;white-space:nowrap;
}
.anchor-bar a:hover{color:var(--primary-dark);background:var(--primary-soft);}

/* ============ 时间线 ============ */
.timeline{margin-top:40px;position:relative;}
.timeline::before{
  content:"";position:absolute;left:23px;top:16px;bottom:26px;width:2px;
  background:linear-gradient(180deg,var(--primary) 0%,#C9D9F5 100%);border-radius:2px;
}
.timeline-item{position:relative;padding-left:72px;padding-bottom:28px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-num{
  position:absolute;left:0;top:0;width:48px;height:48px;border-radius:50%;
  background:var(--surface);border:2px solid var(--primary);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;
  box-shadow:var(--shadow-sm);
}
.timeline-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px 26px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease;
}
.timeline-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);}
.timeline-card h3{font-size:21px;margin-bottom:10px;}
.timeline-card p{font-size:15px;color:var(--muted);line-height:1.85;}
.timeline-note{
  margin-top:16px;display:flex;gap:10px;align-items:flex-start;
  background:var(--amber-soft);border-left:3px solid var(--amber);
  border-radius:0 10px 10px 0;padding:12px 16px;font-size:14px;color:#8A5A12;line-height:1.7;
}
.timeline-note i{margin-top:4px;color:var(--amber);}
.step-list{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.step-list li{position:relative;padding-left:20px;font-size:14px;color:var(--muted);line-height:1.8;}
.step-list li::before{
  content:"";position:absolute;left:2px;top:10px;width:6px;height:6px;border-radius:50%;
  background:var(--teal);
}

/* ============ 卡片通用 ============ */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D3DEEC;}
.card-icon{
  width:42px;height:42px;border-radius:12px;background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:17px;margin-bottom:14px;
}
.card-icon.teal{background:var(--teal-soft);color:var(--teal);}
.card-icon.amber{background:var(--amber-soft);color:var(--warning);}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{font-size:14px;color:var(--muted);line-height:1.85;}
.badge{
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:999px;background:var(--primary-soft);color:var(--primary-dark);
}
.badge.teal{background:var(--teal-soft);color:#0A8578;}
.badge.amber{background:var(--amber-soft);color:#A96A0E;}

/* ============ 常见提示对照 ============ */
.check-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s ease,box-shadow .2s ease;
}
.check-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);}
.check-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;}
.check-head h3{font-size:17px;}
.check-card p{font-size:14px;color:var(--muted);line-height:1.85;}
.check-order{
  margin-top:14px;padding-top:14px;border-top:1px dashed var(--border);
  font-size:13px;color:var(--text);
}
.check-order strong{color:var(--primary-dark);}

/* ============ CTA ============ */
.cta-panel{
  background:linear-gradient(135deg,#1B4FA8 0%,#2563D9 62%,#2E7BE6 100%);
  border-radius:20px;padding:48px 44px;color:#fff;position:relative;overflow:hidden;
  box-shadow:0 18px 38px rgba(27,79,168,.24);
}
.cta-panel::after{
  content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;
  background:rgba(255,255,255,.08);
}
.cta-panel h2{color:#fff;font-size:30px;margin-bottom:12px;}
.cta-panel p{color:rgba(255,255,255,.88);font-size:15px;line-height:1.85;max-width:600px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;position:relative;z-index:2;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,color .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 18px rgba(37,99,217,.22);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(37,99,217,.3);}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text);}
.btn-ghost:hover{background:var(--primary-soft);color:var(--primary-dark);border-color:#C9D9F5;}
.btn-light{background:#fff;color:var(--primary-dark);}
.btn-light:hover{background:#EAF1FD;color:var(--primary-dark);transform:translateY(-1px);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.6);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}
.btn-block{width:100%;height:42px;font-size:14px;}

/* ============ 页脚 ============ */
.site-footer{background:#EEF2F8;border-top:1px solid var(--border);padding:56px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand span{
  width:32px;height:32px;border-radius:9px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
}
.footer-brand strong{font-size:16px;color:var(--text);}
.footer-col p{font-size:13px;color:var(--muted);line-height:1.85;}
.footer-col h4{font-size:14px;margin-bottom:14px;color:var(--text);letter-spacing:.3px;}
.footer-col ul{display:flex;flex-direction:column;gap:9px;}
.footer-col ul a{font-size:13px;color:var(--muted);}
.footer-col ul a:hover{color:var(--primary);}
.footer-bottom{
  margin-top:34px;padding-top:18px;border-top:1px solid #DDE5F0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--primary);}
.footer-privacy{margin-top:14px;font-size:12px;color:#7B8798;line-height:1.85;max-width:900px;}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .page-hero{padding:32px 0 36px;}
  .page-hero h1{font-size:32px;}
  .section{padding:56px 0;}
  .section-title{font-size:26px;}
  .cta-panel{padding:36px 26px;}
  .cta-panel h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
}
@media (min-width:1024px){
  .shell-topbar{display:none;}
  .shell-sidebar{transform:translateX(0);}
  .main-wrap{margin-left:var(--sidebar-w);padding-top:0;}
  .anchor-bar{top:0;}
  .shell-overlay{display:none;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .page-hero h1{font-size:28px;letter-spacing:.2px;}
  .hero-lead{font-size:15px;}
  .timeline-item{padding-left:60px;padding-bottom:22px;}
  .timeline::before{left:19px;}
  .timeline-num{width:40px;height:40px;font-size:16px;}
  .timeline-card{padding:20px;}
  .timeline-card h3{font-size:18px;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .section{padding:44px 0;}
  .section-title{font-size:23px;}
  .hero-tags{gap:8px;}
  .tag{font-size:12px;padding:5px 12px;}
}

/* roulang page: category2 */
:root{
  --primary:#2563D9;
  --primary-dark:#1B4FA8;
  --primary-soft:#EDF3FE;
  --accent:#0FAE9B;
  --amber:#F2A33A;
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --text:#14243A;
  --muted:#5B6B80;
  --border:#E2E8F0;
  --success:#16A34A;
  --warn:#D97706;
  --danger:#DC2626;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 6px 18px rgba(20,36,58,.06);
  --shadow-hover:0 12px 28px rgba(20,36,58,.12);
  --sidebar-w:248px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,background-color .18s ease;}
a:hover{color:var(--primary-dark);}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.35;letter-spacing:.2px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(37,99,217,.35);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 顶部栏（移动端） ============ */
.shell-topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:60;
  height:56px;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 10px rgba(20,36,58,.05);
}
.topbar-brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:16px;
  font-weight:700;
  color:var(--text);
}
.topbar-brand span{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:28px;
  height:28px;
  border-radius:9px;
  background:var(--primary);
  color:#fff;
  font-size:15px;
}
.hamburger{
  width:42px;
  height:38px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  cursor:pointer;
  transition:background-color .18s ease,border-color .18s ease;
}
.hamburger span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .2s ease,opacity .2s ease;
}
.hamburger:hover{background:var(--primary-soft);border-color:#C9DBF8;}

/* ============ 左侧 App Shell ============ */
.shell-sidebar{
  position:fixed;
  top:0;
  left:0;
  z-index:70;
  width:var(--sidebar-w);
  height:100vh;
  padding:22px 16px 18px;
  background:var(--surface);
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  transition:transform .26s ease;
}
.sidebar-brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:6px 8px 18px;
  border-bottom:1px solid var(--border);
  margin-bottom:16px;
}
.sidebar-brand span{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:11px;
  background:linear-gradient(135deg,var(--primary),#4C86EE);
  color:#fff;
  font-size:17px;
  font-weight:700;
  box-shadow:0 6px 14px rgba(37,99,217,.25);
}
.sidebar-brand strong{
  font-size:16px;
  font-weight:700;
  color:var(--text);
  line-height:1.3;
}
.sidebar-brand small{
  display:block;
  font-size:12px;
  font-weight:400;
  color:var(--muted);
}
.sidebar-nav{display:flex;flex-direction:column;gap:6px;}
.nav-label{
  font-size:12px;
  color:var(--muted);
  letter-spacing:.6px;
  padding:4px 10px 2px;
}
.nav-item{
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 12px;
  border-radius:var(--radius-sm);
  color:var(--muted);
  font-size:15px;
  font-weight:500;
  border-left:3px solid transparent;
}
.nav-item svg{width:19px;height:19px;flex:0 0 19px;}
.nav-item:hover{background:var(--primary-soft);color:var(--primary);}
.nav-item.is-active{
  background:var(--primary-soft);
  color:var(--primary);
  border-left-color:var(--primary);
  font-weight:600;
}
.sidebar-cta{
  margin-top:auto;
  padding:16px;
  border-radius:var(--radius);
  background:linear-gradient(160deg,#F2F7FF,#E8F1FE);
  border:1px solid #D7E5FB;
}
.sidebar-cta h4{font-size:15px;margin-bottom:6px;}
.sidebar-cta p{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:12px;}
.sidebar-cta .btn{width:100%;justify-content:center;}

.shell-overlay{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(20,36,58,.45);
  z-index:65;
  opacity:0;
  transition:opacity .24s ease;
}
.shell-overlay.is-open{display:block;opacity:1;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 22px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
  box-shadow:0 8px 18px rgba(37,99,217,.22);
}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(37,99,217,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:#fff;
  color:var(--primary);
  border-color:#C9DBF8;
}
.btn-ghost:hover{background:var(--primary-soft);color:var(--primary-dark);}
.btn-amber{
  background:var(--amber);
  color:#3A2600;
  box-shadow:0 8px 18px rgba(242,163,58,.25);
}
.btn-amber:hover{background:#E1952A;color:#3A2600;transform:translateY(-1px);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.55;cursor:not-allowed;box-shadow:none;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
}
.text-link:hover{text-decoration:underline;}
.text-link svg{width:15px;height:15px;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  line-height:1.6;
  background:var(--primary-soft);
  color:var(--primary);
  border:1px solid #D7E5FB;
}
.tag-green{background:#E8F8F4;color:#0B8577;border-color:#C7EDE6;}
.tag-amber{background:#FEF4E4;color:#B87217;border-color:#F7E0BC;}
.tag-red{background:#FDECEC;color:var(--danger);border-color:#F8D2D2;}

/* ============ 主内容区 ============ */
.shell-main{margin-left:0;min-height:100vh;}

/* ============ Hero ============ */
.page-hero{
  background:linear-gradient(180deg,#EEF4FE 0%,#F6F8FB 100%);
  border-bottom:1px solid var(--border);
  padding:56px 0 48px;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb span.sep{color:#B7C3D3;}
.hero-grid{align-items:center;}
.hero-copy h1{
  font-size:34px;
  line-height:1.28;
  letter-spacing:.3px;
  margin-bottom:16px;
}
.hero-copy h1 em{font-style:normal;color:var(--primary);}
.hero-sub{
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
  max-width:620px;
  margin-bottom:22px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-media img{
  width:100%;
  height:216px;
  object-fit:cover;
  border-radius:16px;
  box-shadow:var(--shadow);
  border:1px solid var(--border);
}

/* ============ 板块通用 ============ */
.section{padding:64px 0;}
.section-alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.section-head{max-width:760px;margin-bottom:32px;}
.eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:1px;
  color:var(--accent);
  margin-bottom:10px;
}
.section-head h2{font-size:28px;margin-bottom:12px;}
.section-sub{font-size:15px;color:var(--muted);line-height:1.85;}

/* ============ 安全底线清单 ============ */
.grid-x.grid-padding-x{margin-left:-12px;margin-right:-12px;}
.grid-x.grid-padding-x>.cell{padding-left:12px;padding-right:12px;}
.guard-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:22px 20px;
  height:100%;
  transition:transform .2s ease,box-shadow .2s ease;
}
.guard-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.guard-icon{
  width:40px;
  height:40px;
  border-radius:12px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:var(--primary-soft);
  color:var(--primary);
  margin-bottom:14px;
}
.guard-icon svg{width:21px;height:21px;}
.guard-card h3{font-size:17px;margin-bottom:8px;}
.guard-card p{font-size:14px;color:var(--muted);line-height:1.8;}

/* ============ FAQ 双栏 ============ */
.faq-layout{margin-top:8px;}
.toc{
  position:sticky;
  top:24px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:16px 14px;
}
.toc h3{
  font-size:13px;
  color:var(--muted);
  font-weight:600;
  letter-spacing:.6px;
  padding:0 8px 10px;
  border-bottom:1px solid var(--border);
  margin-bottom:10px;
}
.toc a{
  display:block;
  padding:10px 12px;
  border-radius:var(--radius-sm);
  border-left:3px solid transparent;
  font-size:14px;
  color:var(--muted);
  line-height:1.5;
}
.toc a:hover{background:var(--primary-soft);color:var(--primary);}
.toc a.is-current{
  background:var(--primary-soft);
  color:var(--primary);
  border-left-color:var(--primary);
  font-weight:600;
}
.toc-note{
  margin-top:12px;
  padding:12px;
  border-radius:var(--radius-sm);
  background:#F6F8FB;
  font-size:13px;
  color:var(--muted);
  line-height:1.75;
}
.faq-group{margin-bottom:28px;scroll-margin-top:80px;}
.faq-group-head{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.faq-group-head h3{font-size:19px;}
.faq-group-head .num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:28px;
  height:28px;
  border-radius:9px;
  background:var(--text);
  color:#fff;
  font-size:14px;
  font-weight:700;
  flex:0 0 28px;
}
.faq-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  margin-bottom:12px;
  overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{box-shadow:var(--shadow);}
.faq-item[open]{border-color:#C9DBF8;box-shadow:var(--shadow);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  padding:17px 54px 17px 18px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";
  position:absolute;
  right:22px;
  top:24px;
  width:10px;
  height:10px;
  border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);
  transform:rotate(45deg);
  transition:transform .2s ease,border-color .2s ease,top .2s ease;
}
.faq-item[open] summary{color:var(--primary);}
.faq-item[open] summary::after{
  transform:rotate(-135deg);
  border-color:var(--primary);
  top:28px;
}
.faq-body{
  padding:4px 18px 20px;
  border-top:1px solid var(--border);
  margin-top:0;
  font-size:15px;
  line-height:1.9;
  color:var(--muted);
}
.faq-body p+p{margin-top:10px;}
.faq-body strong{color:var(--text);font-weight:600;}

/* ============ 提示对照 ============ */
.compare-item{
  display:flex;
  gap:16px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:20px;
  height:100%;
  transition:transform .2s ease,box-shadow .2s ease;
}
.compare-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.compare-mark{
  flex:0 0 4px;
  border-radius:4px;
  background:linear-gradient(180deg,var(--amber),#F6C983);
}
.compare-body h3{font-size:16px;margin-bottom:8px;}
.compare-body dl{margin:0;font-size:14px;color:var(--muted);line-height:1.8;}
.compare-body dt{
  font-weight:600;
  color:var(--text);
  margin-top:10px;
  font-size:13px;
}
.compare-body dt:first-child{margin-top:0;}
.compare-body dd{margin:2px 0 0;}

/* ============ CTA 与表单 ============ */
.cta-panel{
  background:linear-gradient(150deg,#1B4FA8 0%,#2563D9 58%,#3B77E4 100%);
  border-radius:18px;
  padding:40px;
  color:#fff;
  box-shadow:0 18px 40px rgba(27,79,168,.22);
}
.cta-panel h2{color:#fff;font-size:26px;margin-bottom:12px;}
.cta-panel p{color:rgba(255,255,255,.86);font-size:15px;line-height:1.85;max-width:640px;}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 24px;}
.cta-points span{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:999px;
  font-size:13px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.28);
  color:#fff;
}
.form-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:24px;
}
.form-card h3{font-size:18px;margin-bottom:6px;}
.form-card .form-hint{font-size:13px;color:var(--muted);margin-bottom:18px;}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:14px;
  font-weight:600;
  margin-bottom:6px;
  color:var(--text);
}
.field .req{color:var(--danger);margin-left:2px;}
.field input[type="text"],
.field input[type="tel"],
.field select,
.field textarea{
  width:100%;
  padding:12px 14px;
  font-size:15px;
  font-family:inherit;
  color:var(--text);
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:100px;resize:vertical;line-height:1.7;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(37,99,217,.15);
}
.field input:invalid:not(:placeholder-shown){border-color:var(--danger);}
.check-row{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:13px;
  color:var(--muted);
  line-height:1.7;
  margin-bottom:18px;
}
.check-row input{margin-top:3px;width:16px;height:16px;flex:0 0 16px;accent-color:var(--primary);}
.form-note{
  margin-top:14px;
  padding:12px 14px;
  border-radius:var(--radius-sm);
  background:#E8F8F4;
  border:1px solid #C7EDE6;
  color:#0B8577;
  font-size:13px;
}

/* ============ 隐私折叠 ============ */
.privacy-box{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:4px 18px;
}
.privacy-box summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  font-size:14px;
  font-weight:600;
  color:var(--text);
  padding:14px 30px 14px 0;
}
.privacy-box summary::-webkit-details-marker{display:none;}
.privacy-box summary::after{
  content:"+";
  position:absolute;
  right:4px;
  top:12px;
  font-size:18px;
  color:var(--primary);
  font-weight:600;
}
.privacy-box[open] summary::after{content:"–";}
.privacy-box p{
  font-size:13px;
  color:var(--muted);
  line-height:1.85;
  padding-bottom:16px;
  border-top:1px solid var(--border);
  padding-top:14px;
}

/* ============ 页脚 ============ */
.site-footer{
  background:#EEF2F8;
  border-top:1px solid var(--border);
  padding:48px 0 24px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:28px;
  padding-bottom:28px;
  border-bottom:1px solid #DCE4EE;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.footer-brand span{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  font-size:15px;
  font-weight:700;
}
.footer-brand strong{font-size:16px;color:var(--text);}
.footer-col p{font-size:13px;color:var(--muted);line-height:1.85;}
.footer-col h4{font-size:14px;margin-bottom:12px;color:var(--text);}
.footer-col ul li{margin-bottom:8px;}
.footer-col ul li a{font-size:13px;color:var(--muted);}
.footer-col ul li a:hover{color:var(--primary);text-decoration:underline;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  align-items:center;
  padding-top:18px;
  font-size:13px;
  color:var(--muted);
}
.footer-privacy{
  margin-top:12px;
  font-size:12px;
  color:#7A8798;
  line-height:1.85;
}

/* ============ 响应式 ============ */
@media (min-width:1024px){
  .shell-main{margin-left:var(--sidebar-w);}
  .shell-sidebar{transform:none;}
  .shell-overlay{display:none !important;}
}
@media (max-width:1023px){
  .shell-topbar{display:flex;}
  .shell-sidebar{transform:translateX(-100%);box-shadow:0 0 40px rgba(20,36,58,.18);}
  .shell-sidebar.is-open{transform:translateX(0);}
  .hero-copy h1{font-size:30px;}
  .hero-media{margin-top:26px;}
  .toc{position:static;margin-bottom:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px;}
  .cta-panel{padding:32px 24px;}
}
@media (max-width:768px){
  .section{padding:48px 0;}
  .page-hero{padding:44px 0 38px;}
  .container{padding:0 18px;}
  .hero-copy h1{font-size:27px;}
  .section-head h2{font-size:24px;}
  .cta-panel h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-media img{height:190px;}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%;}
  .hero-copy h1{font-size:24px;}
  .section-head h2{font-size:21px;}
  .faq-item summary{font-size:15px;padding:15px 46px 15px 16px;}
  .faq-body{padding:4px 16px 18px;}
  .form-card{padding:18px;}
  .cta-panel{padding:26px 18px;border-radius:14px;}
}