/* roulang page: index */
:root{
  --brand:#1B5AA8;
  --brand-dark:#123E75;
  --brand-light:#E8F0FA;
  --brand-50:#F4F8FD;
  --accent:#F26B21;
  --accent-light:#FFF1E8;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --surface-alt:#F1F5FB;
  --ink:#0B1F3A;
  --ink-body:#475569;
  --ink-muted:#7A8CA3;
  --line:#E6EDF5;
  --line-input:#D8E3EF;
  --line-strong:#C7DBF2;
  --success:#16A34A;
  --success-bg:#ECFDF3;
  --danger:#DC2626;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:16px;
  --shadow-sm:0 1px 2px rgba(11,31,58,.04), 0 8px 24px -12px rgba(11,31,58,.12);
  --shadow-hover:0 16px 40px -16px rgba(27,90,168,.28);
  --sidebar-w:260px;
  --font-sans:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han 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-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease}
button,input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--brand-light);color:var(--brand-dark)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
body.no-scroll{overflow:hidden}

/* ------- 布局骨架 ------- */
.app-shell{min-height:100vh}
.app-main{min-width:0}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:56px 0}
.section-alt{background:var(--surface-alt)}

@media (min-width:1024px){
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
    background:var(--surface);border-right:1px solid var(--line);z-index:40;
  }
  .app-main{margin-left:var(--sidebar-w)}
  .wrap{padding:0 48px}
  .section{padding:96px 0}
}
@media (min-width:768px) and (max-width:1023px){
  .wrap{padding:0 32px}
}

/* ------- 侧栏 ------- */
.sidebar{display:none}
@media (min-width:1024px){.sidebar{display:block}}
.sidebar-inner{display:flex;flex-direction:column;height:100%;padding:28px 20px 24px;overflow-y:auto}
.brand{display:flex;align-items:flex-start;gap:12px}
.brand-logo{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;background:var(--brand);
  color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.brand-lines{display:flex;flex-direction:column;line-height:1.35}
.brand-name{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-sub{margin-top:12px;font-size:12px;line-height:1.6;color:var(--ink-muted)}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:28px}
.nav-item{
  position:relative;display:flex;align-items:center;height:44px;padding-left:16px;
  border-radius:10px;font-size:14px;color:var(--ink-body);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;
  background:transparent;transition:background .2s ease;
}
.nav-item:hover{background:var(--brand-light);color:var(--brand)}
.nav-item.is-active{background:var(--brand-light);color:var(--brand);font-weight:600}
.nav-item.is-active::before{background:var(--accent)}
.side-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--line)}
.side-contact{margin-top:12px;font-size:12px;line-height:1.7;color:var(--ink-muted)}

/* ------- 移动端顶栏与抽屉 ------- */
.mobile-bar{
  position:sticky;top:0;z-index:50;height:56px;display:flex;align-items:center;
  justify-content:space-between;padding:0 16px;background:var(--surface);
  border-bottom:1px solid var(--line);
}
.mobile-brand{display:flex;align-items:center;gap:8px;min-width:0}
.mobile-brand .brand-logo{width:30px;height:30px;border-radius:9px;font-size:14px}
.mobile-brand-text{font-size:13px;font-weight:700;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.menu-btn{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;
  transition:border-color .2s ease,background-color .2s ease;
}
.menu-btn:hover{border-color:var(--line-strong);background:var(--brand-50)}
.menu-btn span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink)}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:78vw;max-width:320px;background:var(--surface);
  z-index:60;padding:20px;display:flex;flex-direction:column;
  transform:translateX(-100%);transition:transform .24s ease;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,31,58,.35);z-index:55;
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{
  width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:#fff;
  cursor:pointer;color:var(--ink-muted);font-size:16px;line-height:1;
}
.drawer-close:hover{border-color:var(--line-strong);color:var(--brand)}
@media (min-width:1024px){
  .mobile-bar,.drawer,.drawer-mask{display:none}
}

/* ------- 按钮 ------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-primary:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn-ghost:hover{background:var(--brand-light);border-color:var(--brand-dark);color:var(--brand-dark)}
.btn-ghost:active{transform:translateY(1px)}
.btn-block{width:100%}
.link-btn{
  color:var(--brand);font-weight:600;font-size:14px;
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
}
.link-btn:hover{color:var(--accent)}

/* ------- 首屏 ------- */
.hero{padding:40px 0 48px}
.hero-grid{display:grid;grid-template-columns:1fr;gap:36px}
.hero-copy{display:flex;flex-direction:column;gap:20px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;align-self:flex-start;
  padding:6px 14px;border-radius:999px;background:var(--brand-light);
  color:var(--brand-dark);font-size:13px;font-weight:600;
}
.hero-eyebrow i{display:block;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hero-title{
  font-size:30px;line-height:1.25;font-weight:700;color:var(--brand-dark);
}
.hero-sub{font-size:16px;line-height:1.8;color:var(--ink-body);max-width:36em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);color:var(--ink-body);font-size:13px;
}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:240px;object-fit:cover;border-radius:20px;box-shadow:var(--shadow-sm);
}
.hero-float{
  position:absolute;left:16px;bottom:16px;display:flex;align-items:center;gap:10px;
  background:#fff;border-radius:12px;padding:12px 16px;font-size:13px;font-weight:600;
  color:var(--ink);box-shadow:0 12px 30px -14px rgba(11,31,58,.35);
}
.hero-float i{display:block;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.hero-float em{font-style:normal;color:var(--brand);font-weight:700}
@media (min-width:768px){
  .hero-visual img{height:340px}
  .hero-title{font-size:36px}
}
@media (min-width:1024px){
  .hero{padding:72px 0 92px;min-height:78vh;display:flex;align-items:center}
  .hero-grid{grid-template-columns:7fr 5fr;gap:56px;align-items:center}
  .hero-copy{padding:24px 0}
  .hero-title{font-size:44px}
  .hero-visual img{height:440px;border-radius:20px}
}

/* ------- 通用标题 ------- */
.sec-head{max-width:720px}
.sec-head h2{font-size:24px;line-height:1.35;font-weight:600;color:var(--ink)}
.sec-head p{margin-top:12px;font-size:16px;color:var(--ink-body)}
.sec-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
@media (min-width:768px){.sec-head h2{font-size:30px}}

/* ------- 三步上手 ------- */
.steps{position:relative;display:grid;gap:24px;grid-template-columns:1fr;margin-top:44px}
.step-card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-sm);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.step-num{
  width:40px;height:40px;border-radius:12px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;
}
.step-card h3{margin-top:18px;font-size:20px;font-weight:600;color:var(--ink)}
.step-card p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--ink-body)}
.step-link{display:inline-block;margin-top:14px}
@media (min-width:1024px){
  .steps{grid-template-columns:repeat(3,1fr);gap:32px}
  .step-card::after{
    content:"";position:absolute;top:46px;right:-24px;width:24px;
    border-top:2px dashed var(--accent);
  }
  .step-card:last-child::after{display:none}
}
@media (max-width:1023px){
  .step-card::after{
    content:"";position:absolute;left:46px;bottom:-16px;height:16px;
    border-left:2px dashed var(--accent);
  }
  .step-card:last-child::after{display:none}
}

/* ------- 案例证明 ------- */
.proof-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:44px}
.proof-main{
  position:relative;border-radius:var(--radius-card);overflow:hidden;min-height:320px;
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:32px;color:#fff;
  background-color:var(--brand);
}
.proof-main img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;
}
.proof-main::before{
  content:"";position:absolute;inset:0;background:var(--brand);opacity:.62;z-index:1;
}
.proof-main-inner{position:relative;z-index:2}
.proof-main h3{font-size:20px;font-weight:600;color:#fff;line-height:1.5}
.proof-main p{margin-top:10px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.88)}
.proof-stats{display:flex;flex-wrap:wrap;gap:32px;margin-top:26px}
.stat-num{font-size:34px;line-height:1.1;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}
.stat-num span{font-size:16px;font-weight:600;margin-left:4px}
.stat-label{font-size:12px;color:rgba(255,255,255,.82);margin-top:6px;letter-spacing:.02em}
.proof-side{display:grid;grid-template-columns:1fr;gap:24px}
.proof-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-sm);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.proof-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.proof-label{
  display:inline-block;font-size:12px;font-weight:600;color:var(--brand);
  background:var(--brand-light);border-radius:999px;padding:4px 12px;
}
.proof-card h3{margin-top:14px;font-size:18px;font-weight:600;color:var(--ink);line-height:1.5}
.proof-card p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-body)}
@media (min-width:1024px){
  .proof-grid{grid-template-columns:7fr 5fr}
  .proof-main{min-height:100%}
}

/* ------- 最新信息 ------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:44px}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-sm);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.badge{
  align-self:flex-start;font-size:12px;font-weight:600;color:var(--brand);
  background:var(--brand-light);border-radius:999px;padding:4px 12px;
}
.news-title{margin-top:16px;font-size:19px;line-height:1.55;font-weight:600}
.news-title a{color:var(--ink)}
.news-title a:hover{color:var(--brand)}
.news-sum{
  margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-top:22px;padding-top:16px;border-top:1px solid var(--line);
}
.news-date{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-muted)}
.news-date::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
.empty-state{
  margin-top:44px;background:var(--surface);border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);padding:48px 24px;text-align:center;
}
.empty-title{font-size:16px;font-weight:600;color:var(--ink)}
.empty-sub{margin-top:8px;font-size:14px;color:var(--ink-muted)}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr)}}

/* ------- FAQ ------- */
.faq-layout{display:grid;grid-template-columns:1fr;gap:40px}
.faq-intro h2{font-size:24px;line-height:1.35;font-weight:600;color:var(--ink)}
.faq-intro p{margin-top:14px;font-size:15px;color:var(--ink-body)}
.faq-aside{
  margin-top:24px;background:var(--brand-light);border-radius:var(--radius-card);
  padding:20px;font-size:14px;line-height:1.8;color:var(--brand-dark);
}
.faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:6px 26px;box-shadow:var(--shadow-sm)}
.faq-item{position:relative;border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:none}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;border-radius:2px;
  background:transparent;transition:background .2s ease;
}
.faq-item[open]::before{background:var(--accent)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:64px;padding:14px 0 14px 16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--ink);transition:color .2s ease}
.faq-item summary:hover h3{color:var(--brand)}
.faq-icon{position:relative;flex:0 0 auto;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-item[open] .faq-icon::before{background:var(--accent)}
.faq-body{padding:0 0 20px 16px;font-size:15px;line-height:1.8;color:var(--ink-body)}
@media (min-width:1024px){
  .faq-layout{grid-template-columns:4fr 8fr;gap:56px}
  .faq-intro h2{font-size:28px}
  .faq-item summary h3{font-size:18px}
}

/* ------- CTA ------- */
.cta-card{
  background:var(--brand-50);border:1px solid var(--line);border-radius:20px;
  padding:32px;display:grid;grid-template-columns:1fr;gap:32px;
}
.cta-left h2{font-size:24px;line-height:1.35;font-weight:600;color:var(--ink)}
.cta-left p{margin-top:14px;font-size:15px;line-height:1.8;color:var(--ink-body);max-width:34em}
.cta-note{margin-top:18px;font-size:13px;color:var(--ink-muted)}
.cta-form{background:var(--surface);border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--ink-muted);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line-input);border-radius:10px;
  background:#fff;font-size:15px;color:var(--ink);transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:auto;min-height:88px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,90,168,.14);
}
.form-tip{font-size:13px;color:var(--ink-muted);margin-top:12px}
.form-success{
  margin-top:14px;background:var(--success-bg);color:var(--success);
  border-radius:10px;padding:10px 14px;font-size:13px;
}
@media (min-width:1024px){
  .cta-card{grid-template-columns:6fr 6fr;padding:44px;align-items:center}
  .cta-left h2{font-size:30px}
}

/* ------- 页脚 ------- */
.site-footer{background:var(--surface-alt);border-top:1px solid var(--line);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
.footer-name{font-size:16px;font-weight:700;color:var(--ink)}
.footer-desc{margin-top:12px;font-size:14px;line-height:1.8;color:var(--ink-muted);max-width:30em}
.footer-col h4{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:14px}
.footer-col li{margin-bottom:10px}
.footer-col a,.footer-col span{font-size:14px;color:var(--ink-muted)}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-muted);
}
@media (min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}}
@media (min-width:1024px){.footer-grid{gap:48px}}

/* ------- 滚动条 ------- */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#CBD8E8;border-radius:8px;border:3px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:#A8BFD9;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

@media print{.sidebar,.mobile-bar,.drawer,.drawer-mask,.cta-form{display:none!important}}

/* roulang page: article */
:root{
  --brand:#1B5AA8;
  --brand-deep:#123E75;
  --brand-soft:#E8F0FA;
  --accent:#F26B21;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --surface-alt:#F1F5FB;
  --ink:#0B1F3A;
  --text:#475569;
  --muted:#7A8CA3;
  --line:#E6EDF5;
  --line-strong:#C7DBF2;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(11,31,58,.04), 0 8px 24px -12px rgba(11,31,58,.12);
  --shadow-hover:0 16px 40px -16px rgba(27,90,168,.28);
  --font: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease, background-color .2s ease, border-color .2s ease}
a:hover{color:var(--accent)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:99}
.skip-link:focus{left:0}

/* ---------- 布局骨架 ---------- */
.app{display:flex;min-height:100vh}
.sidebar{
  width:260px;flex:0 0 260px;position:fixed;top:0;left:0;bottom:0;
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:20px;padding:26px 18px 22px;
  overflow-y:auto;z-index:60;
}
.main-wrap{margin-left:260px;flex:1;min-width:0;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 48px}
.content-pad{padding-top:28px;padding-bottom:0}

/* ---------- 品牌区 ---------- */
.brand-mark{display:block;padding:6px 4px 0}
.brand-line{display:block;font-size:18px;font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:.01em}
.brand-mark:hover .brand-line{color:var(--brand)}
.brand-sub{margin-top:10px;font-size:12px;line-height:1.6;color:var(--muted);padding:0 4px}
.brand-divider{height:1px;background:var(--line);margin:4px 0 2px}

/* ---------- 侧栏导航 ---------- */
.side-nav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;display:flex;align-items:center;height:44px;padding-left:16px;
  border-radius:10px;font-size:14px;color:var(--muted);
  transition:background-color .2s ease, color .2s ease;
}
.nav-item:hover{background:var(--brand-soft);color:var(--brand)}
.nav-item.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--accent);
}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;padding:16px 4px 0;border-top:1px solid var(--line)}
.side-contact{font-size:12px;line-height:1.7;color:var(--muted)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;
  transition:background-color .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:#fff;border:1.5px solid var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand-deep);color:var(--brand-deep)}
.btn-block{width:100%}
.link-btn{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:14px;
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
}
.link-btn:hover{color:var(--accent)}

/* ---------- 移动端顶栏 ---------- */
.mobile-bar{display:none}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,31,58,.35);
  opacity:0;visibility:hidden;transition:opacity .2s ease, visibility .2s ease;z-index:55;
}
body.nav-open .drawer-mask{opacity:1;visibility:visible}
body.nav-open{overflow:hidden}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;line-height:1.6;color:var(--muted);padding:6px 0 2px;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.breadcrumb .current{color:var(--ink);max-width:360px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.breadcrumb .sep{color:#C3D2E2}

/* ---------- 文章头部 ---------- */
.article-head{padding:22px 0 30px;border-bottom:1px solid var(--line)}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.article-title{
  margin-top:16px;font-size:38px;line-height:1.3;font-weight:700;color:var(--ink);
  max-width:900px;overflow-wrap:break-word;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;font-size:13px;color:var(--muted)}
.article-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block}
.article-meta .bar{color:#D3DEEA}

/* ---------- 正文栅格 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:44px;padding:40px 0 0}
.article-main{min-width:0;max-width:820px}
.article-body{font-size:16px;line-height:1.9;color:var(--text);overflow-wrap:break-word}
.article-body>p{margin:0 0 20px}
.article-body h2{
  font-size:28px;line-height:1.4;font-weight:600;color:var(--ink);
  margin:40px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--line);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;color:var(--ink);margin:30px 0 12px}
.article-body h4{font-size:17px;line-height:1.6;font-weight:600;color:var(--ink);margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;line-height:1.8}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:8px 0;padding-left:2px}
.article-body strong{color:var(--ink);font-weight:600}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;border-left:4px solid var(--brand);
  background:var(--brand-soft);border-radius:0 12px 12px 0;color:var(--brand-deep);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px 0 10px}
.article-body figure{margin:22px 0}
.article-body figure img{margin-bottom:10px}
.article-body figcaption{font-size:13px;color:var(--muted);line-height:1.7}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.article-body a:hover{color:var(--accent)}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--surface-alt);color:var(--ink);font-weight:600}
.article-body hr{border:none;height:1px;background:var(--line);margin:32px 0}

/* ---------- 空态 ---------- */
.article-empty{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:40px 32px;text-align:center;
}
.article-empty h2{font-size:24px;color:var(--ink);font-weight:600;margin-bottom:12px}
.article-empty p{font-size:15px;color:var(--text);margin-bottom:22px}

/* ---------- 侧边卡 ---------- */
.article-aside{min-width:0}
.sticky-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:22px;transition:box-shadow .2s ease, border-color .2s ease;
}
.sticky-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.sticky-card img{border-radius:12px;width:100%;aspect-ratio:5/3;object-fit:cover;margin-bottom:16px}
.sticky-card h3{font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;margin-bottom:8px}
.sticky-card p{font-size:14px;line-height:1.75;color:var(--muted);margin-bottom:16px}
.aside-links{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.aside-links a{font-size:14px;color:var(--text);display:flex;align-items:flex-start;gap:8px}
.aside-links a::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:9px;flex:0 0 6px}
.aside-links a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}

/* ---------- 相关推荐 ---------- */
.section{padding:72px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.section-head h2{font-size:26px;line-height:1.4;font-weight:600;color:var(--ink)}
.section-head .sub{font-size:14px;color:var(--muted);margin-top:6px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  padding:24px;transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.card h3{font-size:17px;line-height:1.55;font-weight:600;color:var(--ink);margin:12px 0 10px}
.card h3 a{color:var(--ink)}
.card h3 a:hover{color:var(--brand)}
.card p{font-size:14px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.card-time{font-size:13px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.card-time::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}

/* ---------- 返回 ---------- */
.back-row{padding:40px 0 0}

/* ---------- CTA ---------- */
.cta-band{
  margin-top:80px;background:var(--surface);border:1px solid var(--line);
  border-radius:20px;box-shadow:var(--shadow-card);padding:44px;
  display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:36px;align-items:center;
}
.cta-band h2{font-size:28px;line-height:1.4;font-weight:600;color:var(--ink)}
.cta-band .lead{margin-top:14px;font-size:15px;line-height:1.85;color:var(--text);max-width:560px}
.cta-actions{display:flex;flex-direction:column;gap:14px;justify-self:end;width:100%;max-width:300px}
.cta-note{font-size:13px;line-height:1.7;color:var(--muted);text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:88px;background:var(--surface-alt);border-top:1px solid var(--line);padding:48px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-name{font-size:17px;font-weight:700;color:var(--ink);line-height:1.5}
.footer-desc{margin-top:12px;font-size:13px;line-height:1.8;color:var(--muted);max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li{font-size:13px;line-height:1.7;color:var(--muted)}
.footer-col a{color:var(--muted)}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--muted)}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:56px}
  .article-aside{position:sticky;top:24px;align-self:start}
}
@media (max-width:1279px){
  .article-aside{margin-top:48px;max-width:520px}
}
@media (max-width:1023px){
  .sidebar{
    width:78vw;max-width:320px;transform:translateX(-100%);
    transition:transform .25s ease;box-shadow:0 24px 60px -20px rgba(11,31,58,.35);
  }
  body.nav-open .sidebar{transform:translateX(0)}
  .main-wrap{margin-left:0}
  .mobile-bar{
    display:flex;position:sticky;top:0;height:56px;z-index:50;
    align-items:center;justify-content:space-between;padding:0 18px;
    background:#fff;border-bottom:1px solid var(--line);
  }
  .mobile-brand{font-size:15px;font-weight:700;color:var(--ink);max-width:70%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .hamburger{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
    display:inline-flex;align-items:center;justify-content:center;
  }
  .hamburger:hover{background:var(--brand-soft);border-color:var(--line-strong)}
  .hamburger span{display:block;width:18px;height:2px;background:var(--brand);position:relative}
  .hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--brand)}
  .hamburger span::before{top:-6px}
  .hamburger span::after{top:6px}
  .wrap{padding:0 20px}
  .article-title{font-size:30px}
  .article-layout{padding-top:30px}
  .section{padding-top:56px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:32px 24px;margin-top:56px}
  .cta-actions{justify-self:stretch;max-width:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .article-body h2{font-size:23px;margin-top:32px}
  .article-body h3{font-size:18px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .article-aside{max-width:none}
}
@media (max-width:520px){
  .article-title{font-size:26px}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
  .breadcrumb .current{max-width:180px}
  .cta-band{padding:26px 20px}
}
@media print{
  .sidebar,.mobile-bar,.drawer-mask,.cta-band,.site-footer{display:none !important}
  .main-wrap{margin-left:0}
}

/* roulang page: category1 */
:root{
    --brand-50:#E8F0FA;
    --brand-100:#D6E4F5;
    --brand-400:#3B7BC4;
    --brand-500:#1B5AA8;
    --brand-600:#174C8C;
    --brand-700:#123E75;
    --accent:#F26B21;
    --bg:#F7F9FC;
    --bg-alt:#F1F5FB;
    --card:#FFFFFF;
    --line:#E6EDF5;
    --line-strong:#C7DBF2;
    --input-line:#D8E3EF;
    --ink-900:#0B1F3A;
    --ink-600:#475569;
    --ink-400:#7A8CA3;
    --ok:#16A34A;
    --warn:#DC2626;
    --r-card:16px;
    --r-btn:10px;
    --r-img:14px;
    --shadow-card:0 1px 2px rgba(11,31,58,.04), 0 8px 24px -12px rgba(11,31,58,.12);
    --shadow-lift:0 16px 40px -16px rgba(27,90,168,.28);
    --ease:0.2s ease;
    --side-w:260px;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; }
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink-600);
    font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  img{ max-width:100%; display:block; border-radius:var(--r-img); }
  a{ color:var(--brand-500); text-decoration:none; transition:color var(--ease),border-color var(--ease),background-color var(--ease); }
  a:hover{ color:var(--accent); }
  h1,h2,h3,h4{ color:var(--ink-900); margin:0; line-height:1.35; }
  p{ margin:0; }
  ul,ol{ margin:0; padding:0; list-style:none; }
  button,input,select,textarea{ font-family:inherit; font-size:inherit; color:inherit; }
  :focus-visible{ outline:2px solid var(--accent); outline-offset:2px; border-radius:6px; }
  ::selection{ background:var(--brand-100); color:var(--ink-900); }

  ::-webkit-scrollbar{ width:10px; height:10px; }
  ::-webkit-scrollbar-thumb{ background:#CBD8E8; border-radius:999px; border:3px solid transparent; background-clip:content-box; }
  ::-webkit-scrollbar-thumb:hover{ background:#AFC3DC; background-clip:content-box; }

  .app{ display:flex; min-height:100vh; }

  /* ---------- 左侧竖向导航 ---------- */
  .side{
    position:fixed; top:0; left:0; bottom:0;
    width:var(--side-w);
    background:#fff;
    border-right:1px solid var(--line);
    display:flex; flex-direction:column;
    padding:26px 16px 20px;
    overflow-y:auto;
    z-index:40;
  }
  .brand{ display:block; padding:0 8px 18px; border-bottom:1px solid var(--line); }
  .brand-mark{
    display:block;
    font-size:17px; font-weight:700; line-height:1.35;
    color:var(--ink-900);
  }
  .brand-mark span{ display:block; }
  .brand-mark b{ color:var(--brand-500); font-weight:700; }
  .brand-sub{ margin-top:8px; font-size:12px; line-height:1.6; color:var(--ink-400); }
  .side-nav{ display:flex; flex-direction:column; gap:4px; margin:18px 0 0; }
  .nav-item{
    position:relative;
    display:flex; align-items:center;
    height:44px; padding:0 12px 0 16px;
    border-radius:var(--r-btn);
    font-size:14px; color:var(--ink-600);
    transition:background-color var(--ease),color var(--ease);
  }
  .nav-item:hover{ background:var(--brand-50); color:var(--brand-500); }
  .nav-item.is-active{ background:var(--brand-50); color:var(--brand-500); font-weight:600; }
  .nav-item.is-active::before{
    content:""; position:absolute; left:0; top:9px; bottom:9px; width:3px;
    background:var(--accent); border-radius:0 3px 3px 0;
  }
  .side-foot{ margin-top:auto; padding:18px 8px 0; border-top:1px solid var(--line); }
  .side-foot .tel{ font-size:12px; color:var(--ink-400); margin-top:10px; line-height:1.6; }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    height:44px; padding:0 22px;
    border:none; border-radius:var(--r-btn);
    font-size:15px; font-weight:600; cursor:pointer;
    transition:background-color var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease),border-color var(--ease);
  }
  .btn-primary{ background:var(--brand-500); color:#fff; box-shadow:var(--shadow-card); }
  .btn-primary:hover{ background:var(--brand-700); box-shadow:var(--shadow-lift); transform:translateY(-1px); color:#fff; }
  .btn-primary:active{ transform:translateY(1px); box-shadow:var(--shadow-card); }
  .btn-ghost{ background:#fff; color:var(--brand-500); border:1.5px solid var(--brand-500); }
  .btn-ghost:hover{ background:var(--brand-50); border-color:var(--brand-700); color:var(--brand-700); }
  .btn-ghost:active{ transform:translateY(1px); }
  .btn-block{ width:100%; }
  .btn[disabled],.btn:disabled{ opacity:.4; cursor:not-allowed; transform:none; }
  .link-btn{
    color:var(--brand-500); font-weight:600; font-size:14px;
    text-decoration:underline; text-underline-offset:4px; text-decoration-thickness:1px;
  }
  .link-btn:hover{ color:var(--accent); }
  .link-btn .arw{ display:inline-block; transform:translateY(-1px); transition:transform var(--ease); }
  .link-btn:hover .arw{ transform:translate(3px,-1px); }

  /* ---------- 主体区 ---------- */
  .main{ flex:1; min-width:0; margin-left:var(--side-w); }
  .wrap{ max-width:1200px; margin:0 auto; padding:0 48px; }
  .section{ padding:64px 0; }
  .section + .section{ padding-top:0; }
  .block-gap{ margin-bottom:72px; }
  .block-gap:last-child{ margin-bottom:0; }

  /* ---------- 移动端顶栏 ---------- */
  .topbar{
    display:none;
    position:sticky; top:0; z-index:50;
    height:56px; align-items:center; justify-content:space-between;
    padding:0 16px;
    background:#fff; border-bottom:1px solid var(--line);
  }
  .topbar .tb-brand{ font-size:14px; font-weight:700; color:var(--ink-900); line-height:1.25; }
  .topbar .tb-brand b{ color:var(--brand-500); }
  .burger{
    width:42px; height:42px; display:inline-flex; flex-direction:column; align-items:center; justify-content:center; gap:5px;
    background:#fff; border:1px solid var(--line); border-radius:10px; cursor:pointer;
  }
  .burger span{ display:block; width:18px; height:2px; background:var(--ink-900); border-radius:2px; transition:transform var(--ease),opacity var(--ease); }
  .drawer{
    position:fixed; top:0; left:0; bottom:0; width:78vw; max-width:320px;
    background:#fff; border-right:1px solid var(--line);
    padding:22px 16px; transform:translateX(-102%);
    transition:transform .24s ease; z-index:70; overflow-y:auto;
  }
  .drawer.is-open{ transform:translateX(0); }
  .mask{
    position:fixed; inset:0; background:rgba(11,31,58,.35);
    opacity:0; visibility:hidden; transition:opacity var(--ease),visibility var(--ease); z-index:60;
  }
  .mask.is-open{ opacity:1; visibility:visible; }
  body.no-scroll{ overflow:hidden; }

  /* ---------- Hero ---------- */
  .hero{ padding:56px 0 48px; }
  .hero-grid{ display:grid; grid-template-columns:7fr 5fr; gap:48px; align-items:center; }
  .crumb{ font-size:13px; color:var(--ink-400); margin-bottom:18px; }
  .crumb a{ color:var(--ink-400); }
  .crumb a:hover{ color:var(--brand-500); text-decoration:underline; text-underline-offset:3px; }
  .crumb .sep{ margin:0 6px; color:#C3D0E2; }
  .tag{
    display:inline-flex; align-items:center; gap:6px;
    height:26px; padding:0 12px; border-radius:999px;
    background:var(--brand-50); color:var(--brand-500);
    font-size:12px; font-weight:600;
  }
  .hero h1{ font-size:40px; font-weight:700; margin:18px 0 0; letter-spacing:0; }
  .hero h1 em{ font-style:normal; color:var(--brand-500); }
  .hero-sub{ margin-top:16px; font-size:17px; color:var(--ink-600); max-width:560px; }
  .hero-actions{ display:flex; flex-wrap:wrap; gap:12px; margin-top:26px; }
  .hero-tags{ display:flex; flex-wrap:wrap; gap:10px; margin-top:30px; }
  .hero-tags .pill{
    display:inline-flex; align-items:center; gap:6px;
    height:30px; padding:0 14px; border-radius:999px;
    background:#fff; border:1px solid var(--line);
    font-size:13px; color:var(--ink-600); box-shadow:var(--shadow-card);
  }
  .hero-tags .dot{ width:6px; height:6px; border-radius:50%; background:var(--accent); }
  .hero-media{ position:relative; }
  .hero-media img{
    width:100%; max-width:460px; aspect-ratio:4/3; object-fit:cover;
    border-radius:20px; box-shadow:var(--shadow-card);
  }
  .float-card{
    position:absolute; left:50%; bottom:-18px; transform:translateX(-50%);
    display:flex; align-items:center; gap:10px;
    background:#fff; border:1px solid var(--line); border-radius:14px;
    padding:12px 16px; box-shadow:var(--shadow-card); white-space:nowrap;
  }
  .float-card .fc-idx{
    width:28px; height:28px; border-radius:9px; background:var(--brand-500); color:#fff;
    display:flex; align-items:center; justify-content:center; font-size:13px; font-weight:700;
  }
  .float-card .fc-txt{ font-size:13px; color:var(--ink-900); font-weight:600; }

  /* ---------- 通用区块标题 ---------- */
  .sec-head{ display:flex; align-items:flex-end; justify-content:space-between; gap:20px; margin-bottom:28px; }
  .sec-head h2{ font-size:28px; font-weight:600; }
  .sec-head .sec-note{ font-size:14px; color:var(--ink-400); margin-top:8px; max-width:640px; }

  /* ---------- 两栏：左说明 + 右卡片清单 ---------- */
  .split{ display:grid; grid-template-columns:5fr 7fr; gap:40px; align-items:start; }
  .explain{
    background:#fff; border:1px solid var(--line); border-radius:var(--r-card);
    padding:28px; box-shadow:var(--shadow-card);
    position:sticky; top:24px;
  }
  .explain h2{ font-size:24px; }
  .explain p{ margin-top:14px; font-size:15.5px; }
  .check-list{ margin-top:20px; display:flex; flex-direction:column; gap:12px; }
  .check-list li{ display:flex; gap:10px; font-size:15px; color:var(--ink-600); }
  .check-list .ic{
    flex:0 0 auto; width:20px; height:20px; margin-top:5px; border-radius:50%;
    background:var(--brand-50); color:var(--brand-500); font-size:12px; font-weight:700;
    display:flex; align-items:center; justify-content:center;
  }
  .card-list{ display:flex; flex-direction:column; gap:14px; }
  .info-card{
    background:#fff; border:1px solid var(--line); border-radius:var(--r-card);
    padding:22px 24px; box-shadow:var(--shadow-card);
    transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  }
  .info-card:hover{ transform:translateY(-2px); box-shadow:var(--shadow-lift); border-color:var(--line-strong); }
  .info-card .row{ display:flex; align-items:center; justify-content:space-between; gap:14px; }
  .info-card h3{ font-size:18px; }
  .ord{
    flex:0 0 auto; width:36px; height:36px; border-radius:11px;
    background:var(--brand-50); color:var(--brand-500);
    display:flex; align-items:center; justify-content:center; font-weight:700; font-size:14px;
  }
  .info-card p{ margin-top:10px; font-size:14.5px; color:var(--ink-600); }
  .meta{ display:flex; flex-wrap:wrap; gap:8px; margin-top:14px; }
  .meta span{
    font-size:12px; color:var(--ink-400);
    background:var(--bg-alt); border-radius:999px; padding:4px 10px;
  }

  /* ---------- 四步流程 ---------- */
  .flow{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; position:relative; }
  .flow-step{ position:relative; background:#fff; border:1px solid var(--line); border-radius:var(--r-card); padding:24px; box-shadow:var(--shadow-card); }
  .flow-step .num{
    width:40px; height:40px; border-radius:12px; background:var(--brand-500); color:#fff;
    display:flex; align-items:center; justify-content:center; font-weight:700; font-size:16px;
    font-variant-numeric:tabular-nums;
  }
  .flow-step h3{ font-size:17px; margin-top:16px; }
  .flow-step p{ font-size:14px; color:var(--ink-600); margin-top:8px; }
  .flow-step::after{
    content:""; position:absolute; top:44px; right:-14px; width:20px;
    border-top:2px dashed var(--accent); opacity:.7;
  }
  .flow-step:last-child::after{ display:none; }

  /* ---------- 设备图文 ---------- */
  .device-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
  .device-card{
    background:#fff; border:1px solid var(--line); border-radius:var(--r-card);
    overflow:hidden; box-shadow:var(--shadow-card);
    transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  }
  .device-card:hover{ transform:translateY(-2px); box-shadow:var(--shadow-lift); border-color:var(--line-strong); }
  .device-card img{ width:100%; height:180px; object-fit:cover; border-radius:0; }
  .device-body{ padding:24px; }
  .device-body h3{ font-size:19px; }
  .device-body p{ margin-top:10px; font-size:15px; }
  .kv{ margin-top:16px; border-top:1px dashed var(--line); padding-top:14px; display:flex; flex-direction:column; gap:8px; }
  .kv li{ display:flex; justify-content:space-between; gap:14px; font-size:14px; }
  .kv li b{ color:var(--ink-900); font-weight:600; font-variant-numeric:tabular-nums; }

  /* ---------- 注意事项 ---------- */
  .notice{
    background:var(--brand-50); border:1px solid var(--line-strong); border-left:4px solid var(--brand-500);
    border-radius:var(--r-card); padding:28px 30px;
  }
  .notice h2{ font-size:24px; }
  .notice p{ margin-top:12px; font-size:15.5px; }
  .notice ul{ margin-top:18px; display:grid; grid-template-columns:repeat(2,1fr); gap:12px 28px; }
  .notice li{ font-size:15px; display:flex; gap:10px; }
  .notice li::before{ content:""; flex:0 0 auto; width:6px; height:6px; margin-top:10px; border-radius:50%; background:var(--accent); }

  /* ---------- FAQ ---------- */
  .faq-wrap{ background:#fff; border:1px solid var(--line); border-radius:var(--r-card); box-shadow:var(--shadow-card); overflow:hidden; }
  .faq-item + .faq-item{ border-top:1px solid var(--line); }
  .faq-q{
    width:100%; display:flex; align-items:center; justify-content:space-between; gap:18px;
    min-height:64px; padding:16px 24px; background:#fff; border:none; cursor:pointer; text-align:left;
    transition:background-color var(--ease);
  }
  .faq-q:hover{ background:#FAFCFF; }
  .faq-q h3{ font-size:17px; font-weight:600; }
  .faq-ic{
    flex:0 0 auto; width:26px; height:26px; border-radius:8px;
    background:var(--bg-alt); color:var(--brand-500); font-size:16px; line-height:1;
    display:flex; align-items:center; justify-content:center;
    transition:transform var(--ease),background-color var(--ease),color var(--ease);
  }
  .faq-item.is-open .faq-ic{ transform:rotate(45deg); background:var(--brand-500); color:#fff; }
  .faq-a{ max-height:0; overflow:hidden; transition:max-height .2s ease; }
  .faq-a .inner{
    padding:0 24px 20px 24px; font-size:15px; line-height:1.85; color:var(--ink-600);
    border-left:4px solid var(--accent); margin-left:0;
  }
  .faq-item.is-open .faq-q{ background:#FFFCF9; }

  /* ---------- CTA 带 ---------- */
  .cta{
    background:#fff; border:1px solid var(--line); border-radius:20px;
    padding:40px; box-shadow:var(--shadow-card);
    display:grid; grid-template-columns:6fr 6fr; gap:40px;
  }
  .cta h2{ font-size:28px; }
  .cta .cta-note{ margin-top:14px; font-size:15.5px; }
  .cta .cta-line{ margin-top:22px; display:flex; flex-wrap:wrap; gap:10px 22px; font-size:14px; color:var(--ink-400); }
  .cta .cta-line b{ color:var(--ink-900); font-weight:600; font-variant-numeric:tabular-nums; }
  .cta-actions{ display:flex; gap:12px; margin-top:26px; flex-wrap:wrap; }

  .form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
  .field{ display:flex; flex-direction:column; gap:7px; }
  .field.full{ grid-column:1 / -1; }
  .field label{ font-size:13px; color:var(--ink-400); }
  .field input,.field select,.field textarea{
    height:44px; padding:0 14px;
    border:1px solid var(--input-line); border-radius:10px; background:#fff;
    transition:border-color var(--ease),box-shadow var(--ease);
  }
  .field textarea{ height:92px; padding:12px 14px; resize:vertical; line-height:1.7; }
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none; border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(27,90,168,.14);
  }
  .field .err{ font-size:13px; color:var(--warn); display:none; }
  .field.has-err input,.field.has-err select{ border-color:var(--warn); }
  .field.has-err .err{ display:block; }
  .form-actions{ grid-column:1 / -1; display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; }
  .form-hint{ font-size:13px; color:var(--ink-400); }
  .form-ok{
    grid-column:1 / -1; display:none; background:#ECFDF3; color:#166534;
    border:1px solid #BBF7D0; border-radius:10px; padding:12px 16px; font-size:14px;
  }
  .form-ok.show{ display:block; }

  /* ---------- 页脚 ---------- */
  .site-footer{ background:var(--bg-alt); border-top:1px solid var(--line); margin-top:80px; }
  .footer-grid{ display:grid; grid-template-columns:2fr 1fr 1fr 1.2fr; gap:36px; padding:52px 0 36px; }
  .footer-name{ font-size:16px; font-weight:700; color:var(--ink-900); }
  .footer-desc{ margin-top:12px; font-size:14px; color:var(--ink-400); max-width:340px; }
  .footer-col h4{ font-size:14px; color:var(--ink-900); margin-bottom:14px; }
  .footer-col ul{ display:flex; flex-direction:column; gap:9px; }
  .footer-col a,.footer-col span{ font-size:14px; color:var(--ink-400); }
  .footer-col a:hover{ color:var(--brand-500); text-decoration:underline; text-underline-offset:3px; }
  .footer-bottom{
    border-top:1px solid var(--line); padding:18px 0 26px;
    display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap;
  }
  .footer-bottom p{ font-size:13px; color:var(--ink-400); }

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    .flow{ grid-template-columns:repeat(2,1fr); }
    .flow-step:nth-child(2)::after{ display:none; }
  }
  @media (max-width:1023px){
    .side{ display:none; }
    .main{ margin-left:0; }
    .topbar{ display:flex; }
    .wrap{ padding:0 20px; }
    .hero{ padding:36px 0 40px; }
    .hero-grid{ grid-template-columns:1fr; gap:36px; }
    .hero h1{ font-size:30px; }
    .hero-sub{ font-size:16px; }
    .hero-media img{ max-width:100%; height:240px; aspect-ratio:auto; }
    .float-card{ position:static; transform:none; margin-top:14px; white-space:normal; }
    .split{ grid-template-columns:1fr; gap:28px; }
    .explain{ position:static; }
    .cta{ grid-template-columns:1fr; padding:28px; }
    .footer-grid{ grid-template-columns:1fr 1fr; gap:28px; padding:40px 0 26px; }
    .sec-head h2{ font-size:24px; }
    .notice ul{ grid-template-columns:1fr; }
  }
  @media (max-width:639px){
    .section{ padding:48px 0; }
    .block-gap{ margin-bottom:56px; }
    .device-grid{ grid-template-columns:1fr; }
    .flow{ grid-template-columns:1fr; }
    .flow-step::after{ display:none; }
    .form-grid{ grid-template-columns:1fr; }
    .form-actions{ justify-content:stretch; }
    .form-actions .btn{ width:100%; }
    .footer-grid{ grid-template-columns:1fr; }
    .hero-actions .btn{ width:100%; }
    .cta h2{ font-size:24px; }
    .faq-q h3{ font-size:16px; }
  }
  @media print{
    .side,.topbar,.drawer,.mask,.cta-actions{ display:none !important; }
    .main{ margin-left:0; }
  }

/* roulang page: category2 */
:root{
  --brand:#1B5AA8;
  --brand-dark:#123E75;
  --brand-light:#E8F0FA;
  --accent:#F26B21;
  --bg:#F7F9FC;
  --bg-alt:#F1F5FB;
  --surface:#FFFFFF;
  --ink:#0B1F3A;
  --text:#475569;
  --muted:#7A8CA3;
  --line:#E6EDF5;
  --line-strong:#C7DBF2;
  --input-line:#D8E3EF;
  --success:#16A34A;
  --danger:#DC2626;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(11,31,58,.04), 0 8px 24px -12px rgba(11,31,58,.12);
  --shadow-hover:0 16px 40px -16px rgba(27,90,168,.28);
  --sidebar-w:260px;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

/* ---------- 骨架 ---------- */
.shell{display:flex;min-height:100vh;}

.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:#fff;
  border-right:1px solid var(--line);
  padding:26px 18px 22px;
  display:flex;
  flex-direction:column;
  gap:26px;
  overflow-y:auto;
  z-index:40;
}

.brand{display:flex;align-items:flex-start;gap:12px;}
.brand-mark{
  flex:0 0 auto;
  width:40px;height:40px;
  border-radius:12px;
  background:var(--brand);
  color:#fff;
  display:grid;place-items:center;
  font-weight:700;font-size:16px;
  line-height:1;
}
.brand-text{min-width:0;}
.brand-name{
  display:block;
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  line-height:1.45;
  word-break:break-all;
}
.brand-sub{
  display:block;
  margin-top:8px;
  font-size:12px;
  line-height:1.65;
  color:var(--muted);
}

.side-nav{display:flex;flex-direction:column;gap:6px;}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  height:44px;
  padding:0 16px;
  border-radius:10px;
  border-left:3px solid transparent;
  font-size:14px;
  color:var(--muted);
}
.nav-item:hover{background:var(--brand-light);color:var(--brand);}
.nav-item.is-active{
  background:var(--brand-light);
  color:var(--brand);
  font-weight:600;
  border-left-color:var(--accent);
}

.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;}
.sidebar-contact{
  margin:0;
  font-size:12px;
  line-height:1.7;
  color:var(--muted);
}

.main-area{
  flex:1;
  min-width:0;
  margin-left:var(--sidebar-w);
  display:flex;
  flex-direction:column;
}

.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 48px;
}

/* ---------- 移动端导航 ---------- */
.mobile-bar{display:none;}
.scrim{display:none;}

.menu-btn{
  width:40px;height:40px;
  display:grid;place-items:center;
  border:1px solid var(--line);
  border-radius:10px;
  background:#fff;
  color:var(--ink);
  cursor:pointer;
  transition:background-color .2s ease,border-color .2s ease;
}
.menu-btn:hover{background:var(--brand-light);border-color:var(--line-strong);}

/* ---------- Hero ---------- */
.subhero{
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:68px 0 58px;
}
.subhero-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,420px);
  gap:48px;
  align-items:center;
}
.eyebrow{
  margin:0 0 16px;
  font-size:13px;
  line-height:1.6;
  color:var(--muted);
}
.eyebrow a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.eyebrow span{margin:0 8px;color:var(--line-strong);}

.h1{
  margin:0;
  font-size:44px;
  line-height:1.25;
  font-weight:700;
  color:var(--ink);
  letter-spacing:0;
}
.h2{
  margin:0;
  font-size:30px;
  line-height:1.35;
  font-weight:600;
  color:var(--ink);
}
.h3{
  margin:0;
  font-size:20px;
  line-height:1.5;
  font-weight:600;
  color:var(--ink);
}
.lead{
  margin:18px 0 0;
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  max-width:38ch;
}

.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.tag-row{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:28px 0 0;
  padding:0;
}
.tag-row li{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:999px;
  background:var(--bg-alt);
  border:1px solid var(--line);
  color:var(--muted);
  font-size:12.5px;
}

.subhero-media{margin:0;}
.subhero-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:20px;
  box-shadow:var(--shadow-sm);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 28px -14px rgba(27,90,168,.6);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-primary:disabled{opacity:.4;cursor:not-allowed;}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand);border-width:1.5px;}
.btn-ghost:hover{background:var(--brand-light);border-color:var(--brand-dark);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand);
  font-weight:600;
  font-size:14px;
  text-decoration:underline;
  text-underline-offset:4px;
}
.btn-link:hover{color:var(--accent);}

/* ---------- 区块 ---------- */
.section{padding:44px 0;}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:64px 0;}
.section-head{max-width:60ch;}
.section-head p{margin:14px 0 0;font-size:16px;color:var(--text);}
.body-text{margin:16px 0 0;font-size:16px;line-height:1.9;color:var(--text);max-width:62ch;}

/* ---------- 说明段 ---------- */
.intro-grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.point-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;}
.point{
  display:grid;
  grid-template-columns:40px minmax(0,1fr);
  gap:16px;
  align-items:start;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  padding:20px 22px;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.point:hover{border-color:var(--line-strong);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.point-num{
  width:40px;height:40px;
  border-radius:12px;
  background:var(--brand);
  color:#fff;
  display:grid;place-items:center;
  font-size:15px;
  font-weight:700;
}
.point-title{margin:0;font-size:16px;font-weight:600;color:var(--ink);line-height:1.5;}
.point-desc{margin:6px 0 0;font-size:14.5px;line-height:1.75;color:var(--text);}

/* ---------- 纵向分组列表 ---------- */
.group-block{padding:0 0 40px;}
.group-block:last-child{padding-bottom:0;}
.group-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding-bottom:14px;
  border-bottom:2px solid var(--brand-light);
  margin-bottom:20px;
}
.group-head .h3{font-size:20px;}
.group-count{margin-left:auto;font-size:12.5px;color:var(--muted);}

.group-list{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.group-row{
  display:grid;
  grid-template-columns:46px minmax(170px,236px) minmax(0,1fr) auto;
  gap:18px;
  align-items:center;
  min-height:62px;
  padding:12px 24px;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.group-row:last-child{border-bottom:none;}
.group-row:hover{background:#F8FBFF;}
.row-index{
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
}
.row-title{margin:0;font-size:15px;font-weight:600;color:var(--ink);line-height:1.55;}
.row-desc{margin:0;font-size:14px;line-height:1.7;color:var(--text);}
.pill{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  background:var(--brand-light);
  color:var(--brand);
  font-size:12px;
  font-weight:600;
  white-space:nowrap;
}

/* ---------- 注意事项 ---------- */
.notes-grid{
  display:grid;
  grid-template-columns:minmax(0,460px) minmax(0,1fr);
  gap:48px;
  align-items:center;
}
.notes-media{margin:0;}
.notes-media img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
}
.notes-list{list-style:none;margin:22px 0 0;padding:0;display:flex;flex-direction:column;gap:14px;}
.notes-list li{
  position:relative;
  padding-left:26px;
  font-size:15px;
  line-height:1.8;
  color:var(--text);
}
.notes-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  width:10px;height:10px;
  border-radius:3px;
  background:var(--accent);
}

/* ---------- 更新说明 ---------- */
.update-list{
  list-style:none;
  margin:26px 0 0;
  padding:0;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.update-list li{
  display:grid;
  grid-template-columns:130px minmax(0,1fr) auto;
  gap:18px;
  align-items:center;
  min-height:62px;
  padding:14px 24px;
  border-bottom:1px solid var(--line);
}
.update-list li:last-child{border-bottom:none;}
.update-date{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.update-text{margin:0;font-size:15px;color:var(--ink);line-height:1.7;}

/* ---------- FAQ ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:minmax(0,300px) minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.faq-aside p{margin:14px 0 0;font-size:15px;line-height:1.85;color:var(--text);}
.faq-list{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  position:relative;
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:16px 22px 16px 26px;
  border:0;
  background:none;
  text-align:left;
  cursor:pointer;
  transition:background-color .2s ease;
}
.faq-q::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:4px;
  background:transparent;
  transition:background-color .2s ease;
}
.faq-q:hover{background:#F8FBFF;}
.faq-q .faq-title{
  margin:0;
  font-size:18px;
  font-weight:600;
  color:var(--ink);
  line-height:1.5;
}
.faq-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  display:grid;place-items:center;
  border-radius:8px;
  background:var(--brand-light);
  color:var(--brand);
  font-size:16px;
  font-weight:700;
  line-height:1;
  transition:transform .2s ease,background-color .2s ease,color .2s ease;
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .2s ease;
}
.faq-a-inner{
  padding:0 26px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--text);
}
.faq-item.is-open .faq-q::before{background:var(--accent);}
.faq-item.is-open .faq-icon{background:var(--accent);color:#fff;transform:rotate(45deg);}
.faq-item.is-open .faq-a{max-height:420px;}

/* ---------- CTA ---------- */
.cta-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-sm);
  padding:40px;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,420px);
  gap:44px;
}
.cta-copy p{margin:16px 0 0;font-size:15px;line-height:1.85;color:var(--text);max-width:44ch;}
.cta-meta{
  margin-top:24px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  font-size:13.5px;
  color:var(--muted);
}

.form-row{margin-bottom:16px;}
.field-label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;}
.input,.select,.textarea{
  width:100%;
  min-height:44px;
  padding:10px 14px;
  background:#fff;
  color:var(--ink);
  border:1px solid var(--input-line);
  border-radius:10px;
  font-size:15px;
  line-height:1.6;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.textarea{min-height:88px;resize:vertical;}
.input:focus,.select:focus,.textarea:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(27,90,168,.14);
}
.input::placeholder,.textarea::placeholder{color:#A9B7C8;}
.form-error{display:none;margin-top:6px;font-size:13px;color:var(--danger);}
.form-error.is-visible{display:block;}
.form-actions{display:flex;justify-content:flex-end;margin-top:20px;}
.form-ok{
  display:none;
  margin-top:16px;
  padding:10px 14px;
  border-radius:10px;
  background:#E8F7EE;
  border:1px solid #B7E4C9;
  color:#15803D;
  font-size:13px;
}
.form-ok.is-visible{display:block;}
.form-note{margin:14px 0 0;font-size:12.5px;color:var(--muted);line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-alt);
  border-top:1px solid var(--line);
  padding:56px 0 24px;
  margin-top:8px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:32px;
}
.footer-name{margin:0;font-size:16px;font-weight:700;color:var(--ink);line-height:1.5;}
.footer-desc{margin:10px 0 0;font-size:13px;line-height:1.75;color:var(--muted);max-width:34ch;}
.footer-col h4{margin:0 0 14px;font-size:13px;font-weight:600;color:var(--ink);}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
.footer-col a,.footer-col span{font-size:13px;color:var(--muted);line-height:1.7;}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  margin-top:36px;
  padding-top:18px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 20px;
}
.footer-bottom p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.7;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .wrap{padding:0 40px;}
}

@media (max-width:1023px){
  .sidebar{
    width:78vw;
    max-width:340px;
    transform:translateX(-100%);
    transition:transform .2s ease;
    box-shadow:none;
    padding-top:24px;
  }
  .sidebar.is-open{transform:translateX(0);box-shadow:0 16px 40px -16px rgba(11,31,58,.28);}
  .main-area{margin-left:0;padding-top:56px;}
  .mobile-bar{
    display:flex;
    position:fixed;
    top:0;left:0;right:0;
    height:56px;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:0 18px;
    background:#fff;
    border-bottom:1px solid var(--line);
    z-index:50;
  }
  .mobile-brand{
    font-size:14px;
    font-weight:700;
    color:var(--ink);
    line-height:1.4;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
  }
  .scrim{
    display:block;
    position:fixed;
    inset:0;
    background:rgba(11,31,58,.35);
    opacity:0;
    pointer-events:none;
    transition:opacity .2s ease;
    z-index:45;
  }
  .scrim.is-open{opacity:1;pointer-events:auto;}
  body.no-scroll{overflow:hidden;}
}

@media (max-width:900px){
  .intro-grid,.notes-grid,.faq-layout,.cta-card{grid-template-columns:1fr;gap:32px;}
  .notes-media{order:-1;max-width:460px;}
  .cta-card{padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}

@media (max-width:767px){
  .wrap{padding:0 20px;}
  .h1{font-size:30px;}
  .h2{font-size:24px;}
  .h3{font-size:18px;}
  .lead{font-size:16px;}
  .subhero{padding:44px 0 40px;}
  .subhero-grid{grid-template-columns:1fr;gap:28px;}
  .subhero-media img{aspect-ratio:16/9;}
  .section{padding:30px 0;}
  .section-alt{padding:44px 0;}
  .group-row{
    grid-template-columns:40px minmax(0,1fr);
    gap:10px 14px;
    padding:14px 18px;
    min-height:56px;
  }
  .group-row .row-desc{grid-column:1 / -1;padding-left:54px;}
  .group-row .pill{grid-column:1 / -1;margin-left:54px;}
  .update-list li{grid-template-columns:1fr;gap:6px;padding:16px 18px;min-height:56px;}
  .faq-q{padding:14px 18px 14px 20px;}
  .faq-q .faq-title{font-size:16px;}
  .faq-a-inner{padding:0 20px 18px;}
  .form-actions{justify-content:stretch;}
  .form-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;}
  .btn{padding:0 18px;}
}

@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .brand-name{font-size:14px;}
  .group-head{flex-wrap:wrap;}
  .group-count{margin-left:0;width:100%;}
}