/* roulang page: index */
:root{
  --brand:#FF4D14;
  --brand-dark:#C93A0C;
  --brand-soft:#FFF1E8;
  --accent:#1E6F5C;
  --yellow:#F2B705;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --line:#E3E1DB;
  --ink-900:#101215;
  --ink-700:#2C3037;
  --ink-500:#5A6069;
  --inverse:rgba(255,255,255,.82);
  --danger:#D93025;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,18,21,.06),0 8px 24px -12px rgba(16,18,21,.18);
  --sh-2:0 10px 32px -14px rgba(16,18,21,.28);
  --sidebar-w:236px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:hidden}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--paper);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--ink-700);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand)}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.34;font-weight:700}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.ni{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* ---------- 布局骨架 ---------- */
.layout{margin-left:var(--sidebar-w);transition:margin-left .2s ease}
.container{max-width:1200px;margin:0 auto;padding:0 32px 0 40px}
section{padding:72px 0}
.sec-head{margin-bottom:30px}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:700}
.sec-desc{margin-top:10px;font-size:15px;color:var(--ink-500);line-height:1.75;max-width:720px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.text-link{color:var(--brand-dark);font-weight:600;font-size:15px}
.text-link:hover{color:var(--brand);text-decoration:underline}

/* ---------- 侧栏 / 导航 ---------- */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:16px;
  padding:22px 16px 18px;overflow-y:auto;z-index:60;
}
.brand{display:block;padding:4px 8px 12px;border-bottom:1px solid var(--line)}
.brand-logo{display:block;font-size:20px;font-weight:800;letter-spacing:.5px;color:var(--ink-900);line-height:1.3}
.brand-logo:hover{color:var(--brand)}
.brand-sub{margin-top:6px;font-size:12px;color:var(--ink-500);letter-spacing:.2px}
.sidenav{display:flex;flex-direction:column;gap:6px;flex:1}
.nav-item{
  display:flex;align-items:center;gap:10px;height:40px;padding:0 10px;
  border-radius:8px;font-size:14.5px;color:var(--ink-700);
  border-left:3px solid transparent;position:relative;
}
.nav-item .ni{color:var(--ink-500)}
.nav-item:hover{background:#FAF8F4;color:var(--brand-dark)}
.nav-item:hover .ni{color:var(--brand)}
.nav-item.active{background:var(--brand-soft);border-left-color:var(--brand);color:var(--ink-900);font-weight:700}
.nav-item.active .ni{color:var(--brand)}
.side-cta{width:100%}
.side-foot{font-size:13px;color:var(--ink-500);line-height:1.7;padding:12px 8px 0;border-top:1px solid var(--line)}
.side-foot strong{display:block;color:var(--ink-700);font-weight:600}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;
  cursor:pointer;transition:all .18s ease;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-light{background:var(--brand);color:#fff}
.btn-light:hover{background:#fff;color:var(--brand-dark);border-color:#fff;transform:translateY(-1px)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}

/* ---------- 移动端顶栏 ---------- */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:80;
  background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 14px;
  backdrop-filter:blur(6px);
}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-900);cursor:pointer;transition:.18s;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand)}
.mobile-logo{font-size:17px;font-weight:800;color:var(--ink-900)}
.mobile-link{font-size:14px;font-weight:600;color:var(--brand-dark)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,18,21,.45);
  opacity:0;visibility:hidden;transition:.25s;z-index:70;
}

/* ---------- Hero ---------- */
.hero{
  display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;
  padding:60px 0 68px;
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;
}
.pill::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand)}
.hero h1{
  margin-top:18px;font-size:clamp(28px,4vw,44px);font-weight:800;
  line-height:1.24;letter-spacing:-.5px;
}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--ink-700);max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.stats{display:flex;gap:28px;margin-top:36px;flex-wrap:wrap}
.stats li{display:flex;flex-direction:column;gap:2px;padding-right:28px;border-right:1px solid var(--line)}
.stats li:last-child{border-right:0;padding-right:0}
.stats strong{font-size:24px;font-weight:800;color:var(--ink-900);letter-spacing:-.5px}
.stats span{font-size:13px;color:var(--ink-500)}
.hero-media{position:relative;margin-right:-40px;border-radius:18px;overflow:hidden;box-shadow:var(--sh-1)}
.hero-media img{width:100%;min-height:360px;height:100%;object-fit:cover;border-radius:18px}
.hero-media::after{
  content:"";position:absolute;inset:0;background:rgba(255,77,20,.08);
  border-radius:18px;pointer-events:none;
}
.hero-media figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:10px 16px;
  font-size:12px;color:rgba(255,255,255,.9);
  background:linear-gradient(180deg,rgba(16,18,21,0),rgba(16,18,21,.7));
}

/* ---------- 阶梯卡 ---------- */
.ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding-bottom:32px}
.ladder-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);transition:.2s ease;
  display:flex;flex-direction:column;
}
.ladder-card:nth-child(2){transform:translateY(14px)}
.ladder-card:nth-child(3){transform:translateY(28px)}
.ladder-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.ladder-card:nth-child(2):hover{transform:translateY(12px)}
.ladder-card:nth-child(3):hover{transform:translateY(26px)}
.badge{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;
  background:#F0EFEA;color:var(--ink-700);letter-spacing:.3px;
}
.badge-hot{background:var(--brand-soft);color:var(--brand-dark)}
.badge-green{background:#E7F2EE;color:var(--accent)}
.ladder-card h3{margin-top:16px;font-size:19px;font-weight:700}
.ladder-card p{margin-top:10px;font-size:14.5px;color:var(--ink-500);line-height:1.75}
.ladder-list{margin-top:16px;display:flex;flex-direction:column;gap:8px;font-size:14.5px}
.ladder-list li{position:relative;padding-left:18px;color:var(--ink-700)}
.ladder-list li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;
  border-radius:50%;background:var(--brand-soft);border:2px solid var(--brand);
}
.ladder-card .btn{margin-top:22px;align-self:flex-start}

/* ---------- 对比 ---------- */
.compare-scroll{overflow-x:auto;padding-bottom:8px}
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;min-width:0}
.compare-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;position:relative;box-shadow:var(--sh-1);transition:.2s ease;
  display:flex;flex-direction:column;min-width:240px;
}
.compare-card h3{font-size:18px;font-weight:700}
.compare-card .plan-price{margin-top:10px;font-size:14px;color:var(--ink-500)}
.compare-card .plan-price strong{font-size:26px;font-weight:800;color:var(--accent);letter-spacing:-.5px}
.feature-list{margin-top:20px;display:flex;flex-direction:column}
.feature-list li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:11px 0;border-bottom:1px dashed var(--line);font-size:14.5px;
}
.feature-list li:last-child{border-bottom:0}
.feature-list .fl-key{color:var(--ink-500)}
.feature-list .fl-val{color:var(--ink-900);font-weight:600;text-align:right}
.compare-card .btn{margin-top:24px;width:100%}
.compare-card.recommended{border:2px solid var(--brand);box-shadow:var(--sh-2)}
.compare-card.recommended::before{
  content:"推荐";position:absolute;top:-1px;left:-1px;
  background:var(--brand);color:#fff;font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:var(--r-card) 0 var(--r-card) 0;
}
.scroll-hint{display:none;margin-top:10px;font-size:13px;color:var(--ink-500);text-align:center}

/* ---------- 限时入口 ---------- */
.flash{background:var(--ink-900);padding:64px 0}
.flash-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.flash h2{color:#fff;font-size:clamp(20px,2.4vw,28px)}
.flash p{color:var(--inverse);margin-top:10px;font-size:15px;max-width:520px}
.countdown{display:flex;gap:12px;align-items:center}
.cd-cell{
  width:72px;height:76px;border-radius:12px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
}
.cd-cell strong{font-size:26px;font-weight:800;color:var(--yellow);letter-spacing:-1px;line-height:1}
.cd-cell span{font-size:12px;color:var(--inverse);margin-top:6px}
.flash-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}

/* ---------- 最新信息 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:.2s ease;
}
.post-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);color:var(--ink-700)}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EFEDE8}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.post-tag{
  align-self:flex-start;font-size:12px;font-weight:600;color:var(--brand-dark);
  background:var(--brand-soft);padding:3px 10px;border-radius:999px;
}
.post-card h3{
  margin-top:12px;font-size:18px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card .post-sum{
  margin-top:10px;font-size:14px;line-height:1.7;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{margin-top:auto;padding-top:16px;font-size:13px;color:var(--ink-500);display:flex;gap:14px}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);background:#FCFBF8;
  padding:46px 24px;text-align:center;color:var(--ink-500);font-size:15px;
}
.empty-state .btn{margin-top:18px}

/* ---------- 反馈 ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
}
.quote-card p{font-size:15px;line-height:1.8;color:var(--ink-700)}
.quote-meta{margin-top:16px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-500)}
.quote-avatar{
  width:34px;height:34px;border-radius:50%;background:var(--brand-soft);
  color:var(--brand-dark);font-weight:700;font-size:13px;
  display:flex;align-items:center;justify-content:center;
}

/* ---------- 表单 ---------- */
.consult{display:grid;grid-template-columns:38% 1fr;gap:40px;align-items:start}
.consult-info h2{font-size:clamp(22px,2.6vw,28px)}
.consult-info p{margin-top:14px;font-size:15px;line-height:1.8;color:var(--ink-500)}
.consult-points{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.consult-points li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px}
.consult-points .dot{
  width:22px;height:22px;border-radius:50%;background:var(--brand-soft);
  color:var(--brand-dark);font-size:12px;font-weight:700;flex:none;
  display:flex;align-items:center;justify-content:center;margin-top:3px;
}
.form-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px;box-shadow:var(--sh-1);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}
.field label{font-size:13px;font-weight:600;color:var(--ink-700)}
.field input,.field select,.field textarea{
  height:44px;padding:0 14px;border:1px solid var(--line);border-radius:10px;
  background:#FDFCFA;font-size:15px;transition:.18s ease;
}
.field textarea{height:112px;padding:12px 14px;line-height:1.7;resize:vertical}
.field select{
  appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%235A6069' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
  padding-right:38px;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(255,77,20,.15);
}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:var(--danger)}
.field .err{font-size:14px;color:var(--danger);display:none}
.field.invalid .err{display:block}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-500);margin:6px 0 20px}
.check-row input{width:18px;height:18px;accent-color:var(--brand);margin-top:4px;flex:none}
.form-note{margin-top:14px;font-size:13px;color:var(--ink-500)}
.form-msg{
  margin-top:16px;font-size:14px;border-radius:10px;padding:0 14px;
  max-height:0;overflow:hidden;transition:.25s ease;
}
.form-msg.show{max-height:120px;padding:12px 14px}
.form-msg.ok{background:#E7F2EE;color:var(--accent)}
.form-msg.bad{background:#FDECEA;color:var(--danger)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);border-left:3px solid transparent;padding-left:0;transition:.2s}
.faq-item[open]{border-left-color:var(--brand);padding-left:16px}
.faq-q{
  list-style:none;cursor:pointer;padding:20px 0;font-size:16px;font-weight:700;
  color:var(--ink-900);display:flex;justify-content:space-between;gap:16px;align-items:flex-start;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"+";font-size:20px;font-weight:400;color:var(--ink-500);line-height:1;
  transition:.2s;flex:none;margin-top:2px;
}
.faq-item[open] .faq-q::after{content:"–";color:var(--brand)}
.faq-q:hover{color:var(--brand-dark)}
.faq-a{padding:0 0 22px;font-size:15px;line-height:1.8;color:var(--ink-700);max-width:900px}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:var(--inverse);padding:60px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px}
.footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer p,.footer li{font-size:14px;line-height:1.9}
.footer a{color:var(--inverse)}
.footer a:hover{color:var(--brand)}
.footer-brand{font-size:19px;font-weight:800;color:#fff;letter-spacing:.5px}
.footer-desc{margin-top:12px;max-width:320px}
.footer-list{display:flex;flex-direction:column;gap:8px}
.footer-contact li{display:flex;gap:8px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  text-align:center;font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 空态 / 通用 ---------- */
.tag{display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:#F0EFEA;color:var(--ink-700)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero-media{margin-right:0}
  .container{padding:0 28px}
}
@media (min-width:768px) and (max-width:1023px){
  :root{--sidebar-w:80px}
  .sidebar{padding:18px 10px;align-items:center}
  .brand{padding:2px 0 12px;width:100%;text-align:center}
  .brand-logo{font-size:13px;line-height:1.35;letter-spacing:0}
  .brand-sub{display:none}
  .sidenav{width:100%}
  .nav-item{justify-content:center;padding:0;border-left-width:3px}
  .nav-item span{display:none}
  .nav-item::after{
    content:attr(data-label);position:absolute;left:calc(100% + 10px);top:50%;
    transform:translateY(-50%);background:var(--ink-900);color:#fff;font-size:12px;
    padding:5px 10px;border-radius:6px;white-space:nowrap;opacity:0;
    pointer-events:none;transition:.15s;z-index:80;
  }
  .nav-item:hover::after{opacity:1}
  .side-cta{width:44px;height:44px;padding:0;border-radius:12px}
  .side-cta span{display:none}
  .side-foot{display:none}
  .hero{grid-template-columns:1fr;gap:32px}
  .hero-media img{min-height:280px}
  .post-grid,.quote-grid,.ladder,.compare{grid-template-columns:repeat(2,1fr)}
  .ladder-card:nth-child(3){transform:translateY(0)}
  .compare{grid-template-columns:repeat(2,1fr);min-width:560px}
  .consult{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:767px){
  .layout{margin-left:0;padding-top:56px}
  .mobile-bar{display:flex}
  .sidebar{
    width:82%;max-width:320px;padding:22px 16px;
    transform:translateX(-100%);transition:transform .28s ease;
    box-shadow:0 0 40px rgba(16,18,21,.25);
  }
  body.drawer-open .sidebar{transform:translateX(0)}
  body.drawer-open .drawer-mask{opacity:1;visibility:visible}
  body.drawer-open{overflow:hidden}
  .container{padding:0 18px}
  section{padding:44px 0}
  .hero{padding:34px 0 44px;grid-template-columns:1fr;gap:28px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1}
  .stats{gap:18px;margin-top:28px}
  .stats li{padding-right:18px}
  .hero-media img{min-height:230px}
  .ladder,.post-grid,.quote-grid,.compare{grid-template-columns:1fr}
  .ladder-card:nth-child(2),.ladder-card:nth-child(3){transform:translateY(0)}
  .ladder-card:nth-child(2):hover,.ladder-card:nth-child(3):hover{transform:translateY(-2px)}
  .compare{display:flex;gap:16px;min-width:0}
  .compare-card{min-width:240px}
  .scroll-hint{display:block}
  .form-row{grid-template-columns:1fr}
  .form-card{padding:22px}
  .flash{padding:44px 0}
  .flash-inner{flex-direction:column;align-items:flex-start}
  .cd-cell{width:62px;height:68px}
  .cd-cell strong{font-size:22px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:26px}
  .footer{padding:44px 0 20px}
}
@media (max-width:480px){
  .btn{width:100%}
  .hero-actions{flex-direction:column}
  .stats{flex-direction:column;gap:12px}
  .stats li{border-right:0;padding-right:0}
  .countdown{gap:8px}
  .cd-cell{width:56px;height:62px}
  .footer-grid{grid-template-columns:1fr}
}

/* roulang page: article */
:root{
  --brand:#FF4D14;
  --brand-deep:#C93A0C;
  --brand-soft:#FFF1E8;
  --accent:#1E6F5C;
  --yellow:#F2B705;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --line:#E3E1DB;
  --ink-900:#101215;
  --ink-700:#2C3037;
  --ink-500:#5A6069;
  --inverse:rgba(255,255,255,.82);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,18,21,.06),0 8px 24px -12px rgba(16,18,21,.18);
  --sh-2:0 10px 32px -14px rgba(16,18,21,.28);
  --sidebar-w:236px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html,body{margin:0;padding:0;}
html{-webkit-text-size-adjust:100%;}
body{
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  background:var(--paper);
  color:var(--ink-700);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand-deep);text-decoration:none;transition:color .18s ease,border-color .18s ease;}
a:hover{color:var(--brand);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.35;}
h1{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-.5px;}
h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;}
h3{font-size:19px;font-weight:600;}
p{margin:0 0 1.1em;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

/* ---------- 布局骨架 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:18px;
  padding:24px 16px 20px;z-index:60;overflow-y:auto;
  transition:transform .26s ease;
}
.side-brand{display:flex;flex-direction:column;gap:6px;padding:4px 8px 16px;border-bottom:1px solid var(--line);}
.brand-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;color:var(--ink-900);letter-spacing:-.3px;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;flex:0 0 32px;
  background:linear-gradient(135deg,var(--brand),#FF7A45);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:800;
}
.brand-sub{font-size:12px;color:var(--ink-500);line-height:1.6;}
.sidenav{display:flex;flex-direction:column;gap:4px;}
.nav-item{
  display:flex;align-items:center;gap:10px;height:40px;padding:0 10px;
  border-radius:8px;font-size:14.5px;color:var(--ink-700);
  border-left:3px solid transparent;
}
.nav-item .ni{width:18px;height:18px;flex:0 0 18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.nav-item:hover{background:var(--paper);color:var(--ink-900);}
.nav-item.active{background:var(--brand-soft);border-left-color:var(--brand);color:var(--brand-deep);font-weight:700;}
.side-cta{
  display:block;text-align:center;background:var(--brand);color:#fff;font-weight:600;
  padding:12px 14px;border-radius:var(--r-btn);box-shadow:var(--sh-1);
}
.side-cta:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);}
.side-foot{margin-top:auto;font-size:13px;color:var(--ink-500);line-height:1.75;border-top:1px solid var(--line);padding-top:14px;}

.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px 0 40px;}

.topbar{
  display:none;position:sticky;top:0;z-index:70;height:56px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:0 14px;
}
.menu-btn{width:38px;height:38px;border-radius:9px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--ink-900);}
.menu-btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;}
.topbar-brand{font-weight:800;color:var(--ink-900);font-size:16px;}
.topbar-cta{margin-left:auto;background:var(--brand);color:#fff;font-size:13.5px;font-weight:600;padding:8px 14px;border-radius:999px;}
.topbar-cta:hover{background:var(--brand-deep);color:#fff;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,18,21,.45);opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;z-index:55;
}
.drawer-mask.show{opacity:1;visibility:visible;}

/* ---------- 文章头部 ---------- */
.page-head{padding:36px 0 8px;}
.crumb{font-size:13.5px;color:var(--ink-500);display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:18px;}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#B9B6AE;}
.crumb .cur{color:var(--ink-700);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  color:var(--brand-deep);background:var(--brand-soft);border-radius:999px;padding:5px 12px;margin-bottom:14px;
}
.page-head h1{max-width:860px;}
.meta-row{
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13.5px;color:var(--ink-500);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C9C5BC;}

/* ---------- 正文 ---------- */
.article-wrap{padding:28px 0 8px;}
.article-body{max-width:760px;font-size:16.5px;line-height:1.9;color:var(--ink-700);}
.article-body p{margin:0 0 1.2em;}
.article-body h2{font-size:24px;margin:40px 0 14px;padding-left:14px;border-left:4px solid var(--brand);}
.article-body h3{font-size:19px;margin:30px 0 12px;}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:0;}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin-bottom:9px;line-height:1.85;}
.article-body ul li::before{content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand);}
.article-body ol{counter-reset:li;}
.article-body ol li{counter-increment:li;}
.article-body ol li::before{content:counter(li);position:absolute;left:0;top:.2em;font-size:12px;font-weight:700;color:var(--brand-deep);}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--brand-soft);border-left:4px solid var(--brand);
  border-radius:0 var(--r-img) var(--r-img) 0;color:var(--ink-700);font-size:15.5px;
}
.article-body img{margin:24px 0;width:100%;border-radius:var(--r-img);box-shadow:var(--sh-1);}
.article-body a{color:var(--brand-deep);border-bottom:1px solid rgba(201,58,12,.35);}
.article-body a:hover{color:var(--brand);border-bottom-color:var(--brand);}
.article-body strong{color:var(--ink-900);}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;background:var(--surface);border-radius:var(--r-img);overflow:hidden;}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;}
.article-body th{background:var(--paper);color:var(--ink-900);font-weight:600;}

.empty-state{
  max-width:760px;border:1px dashed var(--line);background:var(--surface);
  border-radius:var(--r-card);padding:44px 28px;text-align:center;box-shadow:var(--sh-1);
}
.empty-state .es-icon{
  width:54px;height:54px;margin:0 auto 16px;border-radius:50%;background:var(--paper);
  display:flex;align-items:center;justify-content:center;color:var(--ink-500);
}
.empty-state .es-icon svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;}
.empty-state h2{font-size:20px;margin-bottom:8px;}
.empty-state p{color:var(--ink-500);font-size:14.5px;margin-bottom:20px;}

/* ---------- 标签与推荐 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:34px 0 0;padding-top:22px;border-top:1px solid var(--line);}
.tag-row .tl{font-size:13.5px;color:var(--ink-500);}
.tag{
  display:inline-flex;align-items:center;font-size:13px;color:var(--ink-700);
  background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 14px;
}
.tag:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--brand-soft);}

.section{padding:56px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:26px;}
.section-head h2{font-size:clamp(21px,2.2vw,27px);}
.section-head .sub{font-size:14px;color:var(--ink-500);margin-top:8px;}
.text-link{font-size:14.5px;font-weight:600;color:var(--brand-deep);white-space:nowrap;}
.text-link:hover{color:var(--brand);text-decoration:underline;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D8D5CD;}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper);}
.card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.card-thumb .badge{
  position:absolute;left:12px;top:12px;background:rgba(16,18,21,.78);color:#fff;
  font-size:12px;padding:4px 10px;border-radius:999px;
}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17.5px;line-height:1.5;}
.card-body h3 a{color:var(--ink-900);}
.card-body h3 a:hover{color:var(--brand-deep);}
.card-body .desc{font-size:14px;line-height:1.7;color:var(--ink-500);margin:0;}
.card-meta{display:flex;gap:14px;align-items:center;font-size:12.5px;color:var(--ink-500);margin-top:auto;}

.back-line{margin-top:36px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  background:var(--brand);color:#fff;box-shadow:var(--sh-1);transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn:active{transform:none;}
.btn-ghost{background:var(--surface);color:var(--ink-900);border:1px solid var(--line);box-shadow:none;}
.btn-ghost:hover{background:var(--surface);color:var(--brand-deep);border-color:var(--brand);}

/* ---------- CTA 深色条 ---------- */
.cta-band{background:var(--ink-900);padding:64px 0;margin-top:24px;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-band h2{color:#fff;font-size:clamp(21px,2.3vw,28px);}
.cta-band p{color:var(--inverse);font-size:15px;margin:10px 0 0;max-width:640px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.btn-yellow{background:var(--yellow);color:#231A00;}
.btn-yellow:hover{background:#DDA600;color:#231A00;}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,.35);color:#fff;}
.btn-outline:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.6);}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:var(--inverse);padding:60px 0 26px;margin-top:auto;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}
.footer-brand{font-size:19px;font-weight:800;color:#fff;margin-bottom:12px;}
.footer-desc{font-size:14px;line-height:1.8;color:var(--inverse);margin:0;max-width:340px;}
.footer h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600;}
.footer-list li{margin-bottom:10px;font-size:14px;}
.footer-list a{color:var(--inverse);}
.footer-list a:hover{color:var(--brand);}
.footer-contact li{color:var(--inverse);}
.footer-bottom{
  margin-top:42px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  text-align:center;font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 断点 ---------- */
@media (max-width:1279px){
  .container{padding:0 26px 0 32px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
}
@media (min-width:768px) and (max-width:1023px){
  :root{--sidebar-w:80px;}
  .sidebar{padding:20px 10px;align-items:center;}
  .side-brand{border-bottom:0;padding:4px 0 12px;align-items:center;}
  .brand-logo{font-size:0;gap:0;}
  .brand-sub{display:none;}
  .sidenav{width:100%;}
  .nav-item{justify-content:center;padding:0;gap:0;}
  .nav-item span{display:none;}
  .side-cta{font-size:0;padding:12px 0;width:44px;margin:0 auto;}
  .side-cta::after{content:"咨询";font-size:13px;}
  .side-foot{display:none;}
  .container{padding:0 24px 0 28px;}
}
@media (max-width:767px){
  .topbar{display:flex;}
  .sidebar{
    width:82%;max-width:320px;transform:translateX(-100%);
    box-shadow:var(--sh-2);padding:22px 16px;
  }
  .sidebar.open{transform:translateX(0);}
  .main{margin-left:0;}
  .container{padding:0 16px;}
  .page-head{padding:22px 0 4px;}
  .article-body{font-size:15.5px;line-height:1.9;}
  .article-body h2{font-size:21px;margin-top:32px;}
  .section{padding:40px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .grid-3{grid-template-columns:1fr;}
  .cta-band{padding:44px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer{padding:44px 0 22px;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:24px;}
  .footer-desc{max-width:none;}
}
@media (max-width:480px){
  .btn{width:100%;}
  .cta-actions{width:100%;}
  .back-line{gap:10px;}
  h1{font-size:26px;}
}

/* roulang page: category1 */
:root{
  --brand:#FF4D14;
  --brand-dark:#C93A0C;
  --brand-soft:#FFF1E8;
  --accent:#1E6F5C;
  --yellow:#F2B705;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --line:#E3E1DB;
  --ink-900:#101215;
  --ink-700:#2C3037;
  --ink-500:#5A6069;
  --inverse:rgba(255,255,255,.82);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,18,21,.06),0 8px 24px -12px rgba(16,18,21,.18);
  --sh-2:0 10px 32px -14px rgba(16,18,21,.28);
  --side:236px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--paper);
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.35}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
body.nav-lock{overflow:hidden}

.container{max-width:1200px;margin:0 auto;padding:0 clamp(18px,3vw,40px)}

/* ---------- 左侧导航 ---------- */
.sidebar{
  position:fixed;inset:0 auto 0 0;width:var(--side);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:4px;
  padding:22px 16px 18px;z-index:60;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;padding:2px 6px 16px}
.brand-mark{
  width:38px;height:38px;flex:none;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;font-weight:800;font-size:15px;letter-spacing:.5px;
  display:flex;align-items:center;justify-content:center;
}
.brand-logo{font-size:17.5px;font-weight:800;color:var(--ink-900);letter-spacing:.2px}
.brand-sub{font-size:12px;color:var(--ink-500);line-height:1.5}
.sidenav{display:flex;flex-direction:column;gap:4px;flex:1}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:40px;
  padding:0 10px;border-radius:8px;font-size:14.5px;color:var(--ink-700);
  transition:background .18s,color .18s;
}
.nav-item:hover{background:#F2F0EA;color:var(--ink-900)}
.nav-item.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:700}
.nav-item.active::before{
  content:"";position:absolute;left:-16px;top:8px;bottom:8px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.ni{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.nav-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  height:44px;margin:14px 0 0;border-radius:var(--r-btn);
  background:var(--brand);color:#fff;font-size:15px;font-weight:700;
  transition:background .18s,transform .18s,box-shadow .18s;
  box-shadow:0 8px 20px -12px rgba(255,77,20,.9);
}
.nav-cta:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--sh-2)}
.nav-cta:active{transform:none}
.nav-cta .ni{stroke-width:1.8}
.nav-foot{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;line-height:1.9;color:var(--ink-500);
}
.nav-foot p{margin:0}
.nav-foot .copy{color:#9AA0A8;font-size:12px}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:50;height:56px;
  align-items:center;justify-content:space-between;gap:12px;
  padding:0 16px;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(6px);
}
.topbar-brand{font-size:17px;font-weight:800;color:var(--ink-900)}
.burger{
  width:40px;height:40px;border-radius:9px;border:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color .18s,background .18s;
}
.burger:hover{border-color:var(--brand)}
.burger span{display:block;width:17px;height:2px;border-radius:2px;background:var(--ink-900)}
.scrim{position:fixed;inset:0;background:rgba(16,18,21,.45);z-index:55}

/* ---------- 主体 ---------- */
.wrap{margin-left:var(--side);min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
.crumbs{font-size:13.5px;color:var(--ink-500);padding:22px 0 0}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{margin:0 6px;color:#B9BDB8}
.crumbs .now{color:var(--ink-900);font-weight:600}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;margin-top:16px;min-height:212px;border-radius:16px;overflow:hidden;
  background:linear-gradient(105deg,rgba(16,18,21,.86),rgba(16,18,21,.55)),
             url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  color:#fff;display:flex;flex-direction:column;justify-content:flex-end;
  padding:28px clamp(20px,3vw,34px);box-shadow:var(--sh-1);
}
.cat-hero h1{color:#fff;font-size:clamp(26px,3.6vw,40px);font-weight:800;letter-spacing:.4px;margin:10px 0 8px}
.cat-hero p{margin:0;color:var(--inverse);font-size:15.5px;max-width:640px}
.chip{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  padding:5px 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-dark);
}
.chip-light{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.28)}

section{margin-top:72px}
.sec-head{max-width:760px;margin-bottom:24px}
.sec-head h2{font-size:clamp(22px,2.4vw,29px);font-weight:700}
.sec-head .sub{margin:8px 0 0;color:var(--ink-500);font-size:14.5px;line-height:1.75}
.lead p{font-size:16px;line-height:1.9;max-width:820px}
.lead p:last-child{margin-bottom:0}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}
.stat{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 22px;box-shadow:var(--sh-1);
}
.stat .num{font-size:27px;font-weight:800;color:var(--ink-900);font-family:system-ui,-apple-system,sans-serif}
.stat .num em{font-style:normal;font-size:15px;font-weight:700;color:var(--brand);margin-left:2px}
.stat .lbl{font-size:13.5px;color:var(--ink-500);margin-top:2px}

/* ---------- 图文块 ---------- */
.media-row{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(20px,3vw,44px);align-items:center}
.media-row.reverse .media-figure{order:2}
.media-figure{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--sh-1);background:#EFEDE7;border:1px solid var(--line)}
.media-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0}
.media-figure .cap{
  position:absolute;left:12px;bottom:12px;padding:5px 11px;border-radius:var(--r-pill);
  background:rgba(16,18,21,.72);color:#fff;font-size:12px;
}
.media-body h3{font-size:clamp(19px,2vw,22px);font-weight:700;margin-bottom:10px}
.media-body p{margin-bottom:14px}
.check-list li{
  position:relative;padding-left:26px;margin-bottom:12px;font-size:15px;line-height:1.8;
}
.check-list li::before{
  content:"";position:absolute;left:2px;top:9px;width:13px;height:13px;border-radius:4px;
  background:var(--brand-soft);border:1.5px solid var(--brand);
}
.check-list li strong{color:var(--ink-900)}

/* ---------- 编号步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:8px}
.step{
  display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#DAD7CF}
.step-no{
  width:32px;height:32px;flex:none;border-radius:10px;background:var(--brand);
  color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;
  font-family:system-ui,-apple-system,sans-serif;
}
.step h4{font-size:16.5px;font-weight:700;margin-bottom:4px}
.step p{margin:0;font-size:14.5px;color:var(--ink-500);line-height:1.75}

/* ---------- 情况卡 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .2s,box-shadow .2s;
}
.case-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.case-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.case-body{padding:18px 20px 22px}
.badge{
  display:inline-block;padding:3px 10px;border-radius:var(--r-pill);font-size:12px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-dark);margin-bottom:10px;
}
.badge-green{background:#E7F2EE;color:var(--accent)}
.case-body h3{font-size:17px;font-weight:700;margin-bottom:6px}
.case-body p{margin:0;font-size:14.5px;color:var(--ink-500);line-height:1.75}

/* ---------- 中部 CTA ---------- */
.cta-band{
  background:var(--ink-900);border-radius:16px;padding:36px clamp(22px,3vw,40px);
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  box-shadow:var(--sh-1);
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,26px);font-weight:700}
.cta-band p{color:var(--inverse);margin:8px 0 0;font-size:14.5px;max-width:560px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:700;
  transition:background .18s,color .18s,border-color .18s,transform .18s,box-shadow .18s;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -14px rgba(255,77,20,1)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.34)}
.btn-ghost:hover{border-color:var(--brand);color:#FFB79B}
.btn-outline{background:var(--surface);color:var(--ink-900);border:1px solid var(--line)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);margin-top:6px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px 18px 16px;font-size:16px;font-weight:700;color:var(--ink-900);
  cursor:pointer;list-style:none;transition:color .18s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-dark)}
.faq-item[open] summary{color:var(--brand-dark)}
.faq-item[open] summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;background:var(--brand);
}
.faq-ico{
  width:22px;height:22px;flex:none;border-radius:50%;border:1.5px solid currentColor;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;line-height:1;
  transition:transform .2s;
}
.faq-item[open] .faq-ico{transform:rotate(45deg)}
.faq-body{padding:0 4px 20px 16px;font-size:15px;line-height:1.8;color:var(--ink-700);max-width:820px}
.faq-body p{margin:0}

/* ---------- 联系卡 ---------- */
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:22px;align-items:stretch}
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px clamp(20px,2.4vw,30px);box-shadow:var(--sh-1);
}
.panel h3{font-size:19px;font-weight:700;margin-bottom:8px}
.panel p{margin:0;color:var(--ink-500);font-size:14.5px}
.info-list{margin-top:16px}
.info-list li{
  display:flex;justify-content:space-between;gap:16px;padding:11px 0;
  border-bottom:1px dashed var(--line);font-size:14.5px;
}
.info-list li:last-child{border-bottom:0}
.info-list .k{color:var(--ink-500)}
.info-list .v{color:var(--ink-900);font-weight:600}
.panel-accent{background:var(--brand-soft);border-color:#F6D9C9}
.panel-accent h3{color:var(--brand-dark)}

/* ---------- 页脚 ---------- */
.footer{margin-top:72px;background:var(--ink-900);color:var(--inverse);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:32px}
.footer-brand{color:#fff;font-size:19px;font-weight:800;margin-bottom:10px}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:340px;margin:0}
.footer h4{font-size:14.5px;color:#fff;font-weight:700;margin-bottom:14px}
.footer-list li{margin-bottom:9px;font-size:14px}
.footer-list a{color:rgba(255,255,255,.72);transition:color .18s}
.footer-list a:hover{color:var(--brand)}
.footer-contact li{color:rgba(255,255,255,.66)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  text-align:center;font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--side:212px}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .media-row{gap:26px}
}
@media (min-width:768px) and (max-width:1023px){
  :root{--side:80px}
  .sidebar{width:80px;padding:18px 10px;align-items:center;overflow:visible}
  .brand{justify-content:center;padding:2px 0 14px}
  .brand-text{display:none}
  .nav-item{justify-content:center;padding:0;width:48px}
  .nav-item span{display:none}
  .nav-item.active::before{left:-10px}
  .nav-item::after{
    content:attr(data-label);position:absolute;left:60px;top:50%;transform:translateY(-50%) scale(.96);
    background:var(--ink-900);color:#fff;font-size:12.5px;line-height:1;padding:8px 11px;border-radius:8px;
    white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .16s,transform .16s;z-index:70;
  }
  .nav-item:hover::after{opacity:1;transform:translateY(-50%) scale(1)}
  .nav-cta{width:48px;height:48px;padding:0;border-radius:12px}
  .nav-cta span{display:none}
  .nav-foot{display:none}
  .stats{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  :root{--side:0px}
  .topbar{display:flex}
  .wrap{margin-left:0}
  .sidebar{
    width:82%;max-width:320px;padding:20px 16px 18px;
    transform:translateX(-100%);transition:transform .26s ease;box-shadow:none;
  }
  .sidebar.open{transform:translateX(0);box-shadow:0 24px 60px -22px rgba(16,18,21,.55)}
  section{margin-top:44px}
  .cat-hero{min-height:178px;padding:22px 20px;border-radius:14px}
  .crumbs{padding-top:16px}
  .stats{grid-template-columns:1fr;gap:14px}
  .media-row{grid-template-columns:1fr;gap:20px}
  .media-row.reverse .media-figure{order:0}
  .media-figure img{aspect-ratio:16/10}
  .case-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .cta-band{padding:26px 20px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .faq-item summary{font-size:15.5px}
  .footer{padding:44px 0 20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-desc{max-width:none}
  .footer-bottom{margin-top:28px}
}
@media (max-width:480px){
  body{font-size:15px}
  .btn{width:100%}
  .cta-actions{flex-direction:column}
  .footer-grid{grid-template-columns:1fr}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root{
  --brand:#FF4D14;
  --brand-dark:#C93A0C;
  --brand-soft:#FFF1E8;
  --accent:#1E6F5C;
  --yellow:#F2B705;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --line:#E3E1DB;
  --ink-900:#101215;
  --ink-700:#2C3037;
  --ink-500:#5A6069;
  --inverse:rgba(255,255,255,.82);
  --danger:#D93025;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,18,21,.06),0 8px 24px -12px rgba(16,18,21,.18);
  --sh-2:0 10px 32px -14px rgba(16,18,21,.28);
  --gap:24px;
  --section:72px;
  --sidenav-w:236px;
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
}
/* ===== reset ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--paper);
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:var(--ink-700);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:hover{color:var(--brand);}
img{max-width:100%;display:block;border-radius:var(--r-img);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
/* ===== 布局骨架 ===== */
.page-wrap{
  margin-left:var(--sidenav-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.container{
  width:100%;
  max-width:1200px;
  padding-left:40px;
  padding-right:40px;
  margin:0 auto;
}
main{flex:1;}
.section{padding:var(--section) 0;}
.section-tight{padding:44px 0;}
/* ===== 左侧竖向导航 ===== */
.sidenav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidenav-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  padding:26px 18px 20px;
  gap:6px;
  overflow-y:auto;
  z-index:60;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 8px 4px;
}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;
  font-weight:800;
  font-size:15px;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:.5px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.brand-name{font-size:16px;font-weight:800;color:var(--ink-900);letter-spacing:.2px;}
.brand-sub{font-size:12px;color:var(--ink-500);}
.nav-list{display:flex;flex-direction:column;gap:4px;margin-top:22px;}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:40px;
  padding:0 10px;
  border-radius:8px;
  font-size:14.5px;
  color:var(--ink-700);
  white-space:nowrap;
}
.nav-item .ni{
  width:18px;height:18px;flex:0 0 18px;
  fill:none;stroke:var(--ink-500);
  stroke-width:1.6;
  stroke-linecap:round;
  stroke-linejoin:round;
  transition:stroke .18s ease;
}
.nav-item:hover{background:#FAF8F4;color:var(--ink-900);}
.nav-item:hover .ni{stroke:var(--brand);}
.nav-item.active{
  background:var(--brand-soft);
  color:var(--ink-900);
  font-weight:700;
}
.nav-item.active .ni{stroke:var(--brand);}
.nav-item.active::before{
  content:"";
  position:absolute;left:0;top:8px;bottom:8px;
  width:3px;border-radius:3px;
  background:var(--brand);
}
.nav-cta{
  margin-top:18px;
  display:flex;align-items:center;justify-content:center;
  height:42px;
  border-radius:var(--r-btn);
  background:var(--brand);
  color:#fff;
  font-size:14px;
  font-weight:700;
  box-shadow:var(--sh-1);
}
.nav-cta:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.sidenav-foot{
  margin-top:auto;
  padding:16px 8px 0;
  border-top:1px solid var(--line);
  font-size:13px;
  line-height:1.75;
  color:var(--ink-500);
}
.sidenav-foot span{display:block;}
/* 移动端顶栏 */
.mobilebar{
  display:none;
  position:sticky;top:0;
  height:56px;
  align-items:center;
  gap:12px;
  padding:0 16px;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  z-index:70;
}
.burger{
  width:40px;height:40px;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);
}
.burger span{display:block;width:16px;height:2px;background:var(--ink-900);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink-900);border-radius:2px;
}
.burger span::before{top:-5px;}
.burger span::after{top:5px;}
.mobilebar-brand{font-weight:800;color:var(--ink-900);font-size:16px;}
.mobilebar-cta{
  margin-left:auto;
  height:34px;padding:0 14px;
  border-radius:var(--r-btn);
  background:var(--brand);color:#fff;
  font-size:13.5px;font-weight:700;
  display:flex;align-items:center;
}
.mobilebar-cta:hover{background:var(--brand-dark);color:#fff;}
/* 抽屉 */
.drawer{
  position:fixed;top:0;left:0;bottom:0;
  width:82%;max-width:320px;
  background:var(--surface);
  border-right:1px solid var(--line);
  padding:20px 16px;
  transform:translateX(-102%);
  transition:transform .26s ease;
  z-index:90;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:0 6px 14px;border-bottom:1px solid var(--line);}
.drawer-close{width:34px;height:34px;border-radius:8px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--ink-500);}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(16,18,21,.45);
  opacity:0;visibility:hidden;
  transition:opacity .26s ease,visibility .26s ease;
  z-index:80;
}
.drawer-mask.open{opacity:1;visibility:visible;}
/* ===== 面包屑与页头 ===== */
.crumb{
  font-size:13px;
  color:var(--inverse);
  display:flex;align-items:center;gap:6px;
  margin-bottom:10px;
}
.crumb a{color:var(--inverse);}
.crumb a:hover{color:#fff;}
.page-hero{
  position:relative;
  min-height:200px;
  display:flex;
  align-items:center;
  background-image:linear-gradient(90deg,rgba(16,18,21,.82),rgba(16,18,21,.62)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  color:#fff;
  border-radius:0 0 var(--r-card) var(--r-card);
  overflow:hidden;
}
.page-hero .container{padding-top:32px;padding-bottom:32px;}
.hero-brand{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;
  letter-spacing:.4px;
  color:var(--inverse);
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.22);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:14px;
}
.page-hero h1{
  font-size:clamp(28px,4vw,40px);
  font-weight:800;
  line-height:1.25;
  color:#fff;
  letter-spacing:.5px;
}
.page-hero p{
  margin-top:12px;
  max-width:640px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--inverse);
}
/* ===== 通用板块标题 ===== */
.sec-head{margin-bottom:32px;max-width:760px;}
.sec-eyebrow{
  display:inline-block;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:1px;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:999px;
  padding:3px 12px;
  margin-bottom:12px;
}
.sec-head h2{
  font-size:clamp(22px,2.6vw,28px);
  font-weight:700;
  color:var(--ink-900);
  line-height:1.35;
}
.sec-head p{
  margin-top:10px;
  font-size:15px;
  color:var(--ink-500);
  line-height:1.8;
}
/* ===== 双段说明 ===== */
.intro-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:var(--gap);
}
.intro-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px;
  box-shadow:var(--sh-1);
}
.intro-card h3{
  font-size:18px;font-weight:600;color:var(--ink-900);
  display:flex;align-items:center;gap:10px;
  margin-bottom:12px;
}
.intro-card h3 i{
  width:6px;height:18px;border-radius:3px;background:var(--brand);display:inline-block;
}
.intro-card p{font-size:15.5px;line-height:1.85;color:var(--ink-700);}
.intro-card p + p{margin-top:.9em;}
/* ===== 图文交替块 ===== */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}
.feature-row + .feature-row{margin-top:56px;}
.feature-row .media{position:relative;}
.feature-row .media img{
  width:100%;height:340px;object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.media-tag{
  position:absolute;left:14px;top:14px;
  background:rgba(16,18,21,.78);
  color:#fff;
  font-size:12.5px;
  padding:5px 12px;
  border-radius:999px;
  letter-spacing:.3px;
}
.feature-body h2{
  font-size:clamp(21px,2.4vw,26px);
  font-weight:700;color:var(--ink-900);
  line-height:1.4;
  margin-bottom:14px;
}
.feature-body p{font-size:15.5px;color:var(--ink-700);margin-bottom:18px;}
.tick-list{display:flex;flex-direction:column;gap:12px;}
.tick-list li{
  display:flex;gap:12px;
  font-size:15px;color:var(--ink-700);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  padding:12px 14px;
}
.tick-list li b{color:var(--ink-900);font-weight:600;}
.tick-mark{
  flex:0 0 20px;width:20px;height:20px;margin-top:4px;
  border-radius:999px;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
/* ===== 提示卡片组 ===== */
.alert-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:var(--gap);
}
.alert-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--brand);
  border-radius:var(--r-card);
  padding:20px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.alert-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.alert-card .code{
  display:inline-block;
  font-size:12.5px;
  font-weight:700;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:999px;
  padding:2px 10px;
  margin-bottom:10px;
}
.alert-card h3{font-size:17px;font-weight:600;color:var(--ink-900);margin-bottom:8px;}
.alert-card p{font-size:14.5px;color:var(--ink-500);line-height:1.75;}
/* ===== 步骤流程 ===== */
.steps-wrap{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:32px 28px;
  box-shadow:var(--sh-1);
}
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:var(--gap);
  counter-reset:step;
}
.step{position:relative;padding-top:14px;}
.step::before{
  counter-increment:step;
  content:"0" counter(step);
  display:block;
  font-size:13px;
  font-weight:800;
  color:var(--brand);
  letter-spacing:1px;
  margin-bottom:8px;
}
.step h4{font-size:16.5px;font-weight:600;color:var(--ink-900);margin-bottom:8px;}
.step p{font-size:14.5px;color:var(--ink-500);line-height:1.75;}
.step-bar{
  height:4px;border-radius:999px;background:var(--brand-soft);
  margin-top:16px;overflow:hidden;
}
.step-bar i{display:block;height:100%;background:var(--brand);border-radius:999px;}
/* ===== 中部 CTA 条 ===== */
.cta-band{
  background:var(--ink-900);
  color:#fff;
  border-radius:var(--r-card);
  padding:40px 36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-band h2{
  font-size:clamp(20px,2.3vw,24px);
  font-weight:700;color:#fff;
  line-height:1.4;
}
.cta-band p{font-size:14.5px;color:var(--inverse);margin-top:8px;max-width:560px;line-height:1.8;}
.cta-band .badge-y{
  display:inline-block;
  background:var(--yellow);
  color:var(--ink-900);
  font-size:12.5px;font-weight:700;
  border-radius:999px;
  padding:3px 12px;
  margin-bottom:12px;
}
/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:700;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  border:1px solid transparent;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--surface);color:var(--ink-900);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-light{background:#fff;color:var(--ink-900);}
.btn-light:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.35);}
.btn-outline-light:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
/* ===== FAQ ===== */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;
  text-align:left;
  font-size:16px;
  font-weight:700;
  color:var(--ink-900);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-q .icon{
  flex:0 0 22px;width:22px;height:22px;
  border:1px solid var(--line);border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;color:var(--ink-500);
  transition:transform .2s ease,color .18s ease,border-color .18s ease;
}
.faq-item.open .faq-q .icon{transform:rotate(45deg);color:var(--brand);border-color:var(--brand);}
.faq-a{
  display:none;
  padding:0 4px 22px 0;
  border-left:0;
}
.faq-item.open{
  border-left:3px solid var(--brand);
  padding-left:16px;
  margin-left:-16px;
}
.faq-item.open .faq-a{display:block;}
.faq-a p{font-size:15px;line-height:1.8;color:var(--ink-700);max-width:820px;}
/* ===== 表单 ===== */
.form-layout{
  display:grid;
  grid-template-columns:38% 62%;
  gap:40px;
  align-items:start;
}
.form-note h2{
  font-size:clamp(21px,2.4vw,26px);
  font-weight:700;color:var(--ink-900);
  line-height:1.4;margin-bottom:14px;
}
.form-note p{font-size:15px;color:var(--ink-500);line-height:1.85;}
.form-note ul{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.form-note li{
  font-size:14.5px;color:var(--ink-700);
  display:flex;gap:10px;align-items:flex-start;
}
.dot{width:6px;height:6px;border-radius:999px;background:var(--brand);margin-top:11px;flex:0 0 6px;}
.form-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--sh-1);
}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:13px;
  color:var(--ink-500);
  margin-bottom:6px;
}
.field input,.field select,.field textarea{
  width:100%;
  height:44px;
  padding:0 14px;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  font-size:15px;
  color:var(--ink-900);
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field select{
  appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-500) 50%),linear-gradient(135deg,var(--ink-500) 50%,transparent 50%);
  background-position:calc(100% - 19px) 19px,calc(100% - 14px) 19px;
  background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--brand);
  background:var(--surface);
  box-shadow:0 0 0 3px rgba(255,77,20,.15);
}
.field .err{display:none;font-size:14px;color:var(--danger);margin-top:6px;}
.field.has-error input,.field.has-error select{border-color:var(--danger);}
.field.has-error .err{display:block;}
.check-row{display:flex;gap:10px;align-items:flex-start;margin:6px 0 18px;font-size:14px;color:var(--ink-500);line-height:1.7;}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--brand);flex:0 0 16px;}
.form-tip{font-size:13.5px;color:var(--ink-500);margin-top:12px;}
.form-ok{
  display:none;
  margin-top:14px;
  padding:12px 14px;
  border-radius:var(--r-btn);
  background:#EDF7F3;
  color:var(--accent);
  font-size:14.5px;
  border:1px solid rgba(30,111,92,.2);
}
.form-ok.show{display:block;}
/* ===== 页脚 ===== */
.footer{
  background:var(--ink-900);
  color:var(--inverse);
  padding:56px 0 0;
  margin-top:var(--section);
}
.footer .container{padding-left:40px;padding-right:40px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:36px;
}
.footer-brand{font-size:18px;font-weight:800;color:#fff;margin-bottom:12px;}
.footer-desc{font-size:14px;line-height:1.85;color:var(--inverse);max-width:320px;}
.footer h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list a{font-size:14px;color:var(--inverse);}
.footer-list a:hover{color:var(--brand);}
.footer-contact li{font-size:14px;color:var(--inverse);line-height:1.7;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 24px;
  text-align:center;
  font-size:13px;
  color:rgba(255,255,255,.6);
}
/* ===== 响应式 ===== */
@media (max-width:1279px){
  .container{padding-left:32px;padding-right:32px;}
  .footer .container{padding-left:32px;padding-right:32px;}
  .alert-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  :root{--sidenav-w:80px;}
  .sidenav{padding:22px 12px;align-items:center;}
  .brand{justify-content:center;padding:0 0 4px;}
  .brand-text{display:none;}
  .nav-item{justify-content:center;padding:0;width:46px;height:44px;}
  .nav-item span{display:none;}
  .nav-item::after{
    content:attr(data-label);
    position:absolute;
    left:56px;
    background:var(--ink-900);
    color:#fff;
    font-size:12.5px;
    padding:5px 10px;
    border-radius:8px;
    white-space:nowrap;
    opacity:0;pointer-events:none;
    transition:opacity .16s ease;
    z-index:5;
  }
  .nav-item:hover::after{opacity:1;}
  .nav-cta{width:46px;padding:0;font-size:12px;overflow:hidden;}
  .sidenav-foot{display:none;}
  .feature-row{gap:28px;}
  .feature-row .media img{height:280px;}
  .form-layout{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  :root{--section:44px;}
  body{font-size:15px;}
  .sidenav{display:none;}
  .mobilebar{display:flex;}
  .page-wrap{margin-left:0;}
  .container{padding-left:16px;padding-right:16px;}
  .footer .container{padding-left:16px;padding-right:16px;}
  .page-hero{min-height:180px;border-radius:0;}
  .page-hero .container{padding-top:26px;padding-bottom:26px;}
  .intro-grid{grid-template-columns:1fr;}
  .feature-row{grid-template-columns:1fr;gap:20px;}
  .feature-row + .feature-row{margin-top:36px;}
  .feature-row.reverse .media{order:2;}
  .feature-row .media img{height:220px;}
  .alert-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;gap:20px;}
  .steps-wrap{padding:22px 18px;}
  .cta-band{padding:28px 20px;}
  .form-card{padding:20px 16px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer{padding-top:40px;margin-top:44px;}
}
@media (max-width:480px){
  .btn{width:100%;}
  .cta-band .btn,.cta-band .btn + .btn{margin-top:4px;}
  .page-hero h1{font-size:26px;}
  .footer-grid{grid-template-columns:1fr;}
  .mobilebar-brand{font-size:15px;}
}

/* roulang page: category3 */
:root{
  --brand:#FF4D14;
  --brand-dark:#C93A0C;
  --brand-soft:#FFF1E8;
  --accent:#1E6F5C;
  --yellow:#F2B705;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --line:#E3E1DB;
  --ink-900:#101215;
  --ink-700:#2C3037;
  --ink-500:#5A6069;
  --inverse:rgba(255,255,255,.82);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,18,21,.06),0 8px 24px -12px rgba(16,18,21,.18);
  --sh-2:0 10px 32px -14px rgba(16,18,21,.28);
  --side-w:236px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  background:var(--paper);
  color:var(--ink-700);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.32;font-weight:700}
h1{font-size:clamp(26px,3.4vw,40px);font-weight:800;letter-spacing:-.5px}
h2{font-size:clamp(21px,2.4vw,28px)}
h3{font-size:18px;font-weight:600}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
ul,ol{margin:0;padding:0}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-soft);color:var(--brand-dark)}

/* ---------- 布局骨架 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  display:flex;flex-direction:column;gap:6px;
  background:var(--surface);border-right:1px solid var(--line);
  padding:20px 14px;overflow-y:auto;z-index:90;
}
.brand{display:flex;align-items:center;gap:10px;padding:4px 8px 18px;border-bottom:1px solid var(--line);margin-bottom:14px}
.brand-mark{
  width:38px;height:38px;flex:0 0 auto;border-radius:11px;background:var(--brand);
  color:#fff;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;
  letter-spacing:.5px;box-shadow:0 6px 16px -8px rgba(255,77,20,.85);
}
.brand-title{font-size:15.5px;font-weight:800;color:var(--ink-900);line-height:1.25}
.brand-sub{font-size:12px;color:var(--ink-500);line-height:1.5;margin-top:2px}
.sidenav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:40px;padding:0 12px;border-radius:8px;
  font-size:14.5px;color:var(--ink-700);
  transition:background .18s ease,color .18s ease;
}
.nav-item .ni{width:18px;height:18px;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav-item:hover{background:#F4F2ED;color:var(--ink-900)}
.nav-item.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:700}
.nav-item.active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--brand)}
.side-bottom{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:14px}
.side-cta{width:100%}
.side-cta svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round}
.side-meta{list-style:none;font-size:13px;line-height:1.7;color:var(--ink-500)}
.side-meta li{display:flex;justify-content:space-between;gap:8px}
.side-meta b{font-weight:600;color:var(--ink-500)}

.content{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

/* ---------- 移动端顶部条 ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:70;
  height:56px;align-items:center;gap:12px;padding:0 16px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.topbar .tb-brand{font-size:15px;font-weight:800;color:var(--ink-900)}
.burger{width:38px;height:38px;border-radius:9px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;background:#fff}
.burger span{display:block;width:16px;height:2px;background:var(--ink-900);position:relative;border-radius:2px}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink-900);border-radius:2px}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.tb-cta{margin-left:auto;height:34px;padding:0 14px;font-size:13.5px}
.mask{
  display:none;position:fixed;inset:0;background:rgba(16,18,21,.45);z-index:85;
}
.mask.show{display:block}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -12px rgba(255,77,20,.9)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}

/* ---------- 分类 Hero ---------- */
main{flex:1}
.cat-hero{
  position:relative;margin:26px 0 0;border-radius:18px;overflow:hidden;
  min-height:210px;display:flex;align-items:flex-end;
  background-image:url('/assets/images/coverpic/cover-3.png');
  background-size:cover;background-position:center;
  box-shadow:var(--sh-1);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(16,18,21,.86) 0%,rgba(16,18,21,.62) 55%,rgba(16,18,21,.34) 100%);
}
.hero-inner{position:relative;z-index:2;padding-top:34px;padding-bottom:30px;color:#fff}
.hero-inner h1{color:#fff;margin:8px 0 10px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--inverse)}
.crumb a{color:var(--inverse);border-bottom:1px solid transparent;transition:border-color .18s,color .18s}
.crumb a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.7)}
.crumb span{color:rgba(255,255,255,.5)}
.eyebrow{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(255,77,20,.24);border:1px solid rgba(255,120,80,.55);
  color:#FFD8C6;font-size:12.5px;font-weight:600;letter-spacing:.4px;
}
.hero-sub{max-width:640px;font-size:15px;line-height:1.8;color:var(--inverse);margin:0}

/* ---------- 板块 ---------- */
.section{padding:56px 0}
.section.tight{padding:34px 0 8px}
.section-head{margin-bottom:26px;max-width:760px}
.section-head h2{margin-bottom:8px}
.section-head p{font-size:15px;color:var(--ink-500);margin:0}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 说明区 ---------- */
.intro-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:32px;align-items:start}
.intro-copy p{font-size:15.5px;color:var(--ink-700)}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
}
.side-card-title{font-size:13px;font-weight:700;color:var(--brand-dark);letter-spacing:.6px;margin-bottom:18px}
.progress{list-style:none;counter-reset:step}
.progress li{position:relative;padding:0 0 20px 38px;counter-increment:step}
.progress li:last-child{padding-bottom:0}
.progress li::before{
  content:counter(step);position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.progress li::after{content:"";position:absolute;left:11.5px;top:30px;bottom:8px;width:1px;background:var(--line)}
.progress li:last-child::after{display:none}
.progress strong{display:block;font-size:15px;color:var(--ink-900);font-weight:600;line-height:1.5}
.progress em{font-style:normal;display:block;font-size:13.5px;color:var(--ink-500);line-height:1.65;margin-top:2px}

/* ---------- 图文交替 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split + .split{margin-top:44px}
.split-media{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);background:#EFEDE7;border:1px solid var(--line)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split-media .badge{
  position:absolute;left:14px;top:14px;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(16,18,21,.78);color:#fff;font-size:12.5px;display:inline-flex;align-items:center;font-weight:600;
}
.split.rev .split-media{order:2}
.split-body h3{margin-bottom:10px}
.split-body p{font-size:15px;color:var(--ink-700)}
.check-list{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:10px}
.check-list li{position:relative;padding-left:24px;font-size:14.5px;color:var(--ink-700);line-height:1.7}
.check-list li::before{
  content:"";position:absolute;left:0;top:7px;width:14px;height:14px;border-radius:999px;
  background:rgba(30,111,92,.12);border:1.5px solid var(--accent);
}
.check-list li::after{
  content:"";position:absolute;left:4px;top:10px;width:6px;height:3px;
  border-left:1.6px solid var(--accent);border-bottom:1.6px solid var(--accent);transform:rotate(-45deg);
}
.step-no{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;font-weight:700;margin-bottom:12px;
}

/* ---------- 数据胶囊 ---------- */
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
.stat{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease;
}
.stat:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.stat b{display:block;font-size:26px;font-weight:800;color:var(--ink-900);line-height:1.2;font-family:system-ui,-apple-system,sans-serif}
.stat span{display:block;font-size:13.5px;color:var(--ink-500);margin-top:6px}
.stat i{display:block;font-style:normal;font-size:12px;color:var(--brand);font-weight:700;margin-bottom:6px;letter-spacing:.5px}

/* ---------- 深色 CTA 条 ---------- */
.cta-band{background:var(--ink-900);padding:64px 0}
.cta-band-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin-bottom:10px}
.cta-band p{color:var(--inverse);font-size:15px;max-width:620px;margin:0}
.cta-band-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-ghost{background:transparent;border-color:rgba(255,255,255,.32);color:#fff}
.cta-band .btn-ghost:hover{border-color:var(--brand);color:#FFB99A;background:transparent}

/* ---------- FAQ ---------- */
.faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;
  padding:18px 48px 18px 20px;font-size:16px;font-weight:700;color:var(--ink-900);
  transition:background .18s ease,color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#FBFAF7}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:transparent;transition:background .2s ease;
}
.faq-item[open] summary::before{background:var(--brand)}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:26px;width:9px;height:9px;
  border-right:2px solid var(--ink-500);border-bottom:2px solid var(--ink-500);
  transform:rotate(45deg);transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-body{padding:0 48px 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-700)}

/* ---------- 表单 ---------- */
.consult-grid{display:grid;grid-template-columns:0.9fr 1.4fr;gap:40px;align-items:start}
.consult-aside h2{margin-bottom:12px}
.consult-aside p{font-size:15px;color:var(--ink-500)}
.consult-points{list-style:none;margin-top:20px;display:flex;flex-direction:column;gap:12px}
.consult-points li{font-size:14.5px;color:var(--ink-700);padding-left:16px;position:relative}
.consult-points li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:999px;background:var(--brand)}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--ink-500);margin-bottom:6px;font-weight:600}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#FCFBF9;color:var(--ink-900);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.field textarea{height:108px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(255,77,20,.15);
}
.field input.err,.field select.err{border-color:#D93025;box-shadow:0 0 0 3px rgba(217,48,37,.12)}
.field select{
  appearance:none;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%235A6069' stroke-width='2.2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
  padding-right:38px;
}
.field .tip{font-size:13.5px;color:#D93025;margin-top:6px;display:none}
.field .tip.show{display:block}
.agree{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ink-500);line-height:1.7;margin:6px 0 18px}
.agree input{width:17px;height:17px;margin-top:3px;accent-color:var(--brand);flex:0 0 auto}
.form-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.form-note{font-size:13.5px;color:var(--accent);font-weight:600;display:none}
.form-note.show{display:block}
.form-note.err{color:#D93025}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:var(--inverse);margin-top:64px}
.footer .container{padding-top:56px;padding-bottom:26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{font-size:18px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);margin:0}
.footer h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:700}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-list a{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s ease}
.footer-list a:hover{color:var(--brand)}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.62)}
.footer-bottom{
  margin-top:36px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  text-align:center;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 28px}
  .split{gap:30px}
  .intro-grid{gap:24px}
}
@media (max-width:1023px){
  :root{--side-w:80px}
  .sidebar{padding:18px 10px;align-items:center}
  .brand{justify-content:center;padding:4px 0 16px;width:100%}
  .brand-text{display:none}
  .nav-item{justify-content:center;padding:0;width:44px;gap:0}
  .nav-item span{display:none}
  .nav-item::after{
    content:attr(data-label);position:absolute;left:56px;top:50%;transform:translateY(-50%);
    background:var(--ink-900);color:#fff;font-size:12.5px;padding:6px 10px;border-radius:8px;
    white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .16s ease;z-index:5;
  }
  .nav-item:hover::after{opacity:1}
  .side-cta{width:44px;padding:0;height:44px}
  .side-cta span{display:none}
  .side-meta{display:none}
  .side-bottom{border-top:0;width:100%;align-items:center}
  .cat-hero{min-height:196px}
  .stat-row{grid-template-columns:1fr 1fr}
  .intro-grid{grid-template-columns:1fr}
  .consult-grid{grid-template-columns:1fr;gap:26px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .topbar{display:flex}
  .content{margin-left:0;padding-top:0}
  .sidebar{
    width:82%;max-width:320px;padding:20px 16px;align-items:stretch;
    transform:translateX(-100%);transition:transform .26s ease;
  }
  .sidebar.open{transform:translateX(0)}
  .brand{justify-content:flex-start;padding:4px 8px 16px}
  .brand-text{display:block}
  .nav-item{justify-content:flex-start;padding:0 12px;width:100%;gap:10px}
  .nav-item span{display:inline}
  .nav-item::after{display:none}
  .side-cta{width:100%;padding:0 22px;height:44px}
  .side-cta span{display:inline}
  .side-meta{display:flex;flex-direction:column}
  .side-bottom{align-items:stretch}
  .container{padding:0 18px}
  .cat-hero{margin-top:16px;min-height:184px;border-radius:14px}
  .hero-inner{padding-top:26px;padding-bottom:24px}
  .section{padding:40px 0}
  .split{grid-template-columns:1fr;gap:20px}
  .split.rev .split-media{order:0}
  .split + .split{margin-top:34px}
  .stat-row{grid-template-columns:1fr;gap:14px;margin-top:26px}
  .cta-band{padding:44px 0}
  .cta-band-actions{width:100%}
  .cta-band-actions .btn{flex:1 1 100%}
  .faq-body{padding-right:22px}
  .faq-item summary{padding-right:44px}
  .footer{margin-top:44px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer .container{padding-top:40px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .form-actions .btn{width:100%}
  .form-card{padding:20px}
  h1{font-size:24px}
}

/* roulang page: category4 */
:root{
  --brand:#FF4D14;
  --brand-deep:#C93A0C;
  --brand-soft:#FFF1E8;
  --accent:#1E6F5C;
  --accent-soft:#E9F4F0;
  --yellow:#F2B705;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --line:#E3E1DB;
  --ink900:#101215;
  --ink700:#2C3037;
  --ink500:#5A6069;
  --inv:rgba(255,255,255,.82);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh1:0 1px 2px rgba(16,18,21,.06), 0 8px 24px -12px rgba(16,18,21,.18);
  --sh2:0 10px 32px -14px rgba(16,18,21,.28);
  --nav-w:236px;
  --sec:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  background:var(--paper);
  color:var(--ink700);
  font-size:16px;
  line-height:1.85;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-deep);text-decoration:none;transition:color .18s ease}
a:hover{text-decoration:underline}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{color:var(--ink900);line-height:1.35}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
svg{display:block}

/* ============ 布局骨架 ============ */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--surface);border-right:1px solid var(--line);
  padding:28px 18px 20px;display:flex;flex-direction:column;
  overflow-y:auto;z-index:70;
}
.brand{display:block;padding:0 12px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-full{display:block;font-size:20px;font-weight:800;color:var(--ink900);letter-spacing:-.3px}
.brand-mini{display:none;font-size:18px;font-weight:800;color:var(--ink900);text-align:center}
.brand-sub{display:block;font-size:12px;color:var(--ink500);font-weight:500;margin-top:6px;letter-spacing:.2px;line-height:1.6}
.side-nav{margin-top:26px;display:flex;flex-direction:column;gap:4px}
.nav-item{
  display:flex;align-items:center;gap:10px;height:40px;padding:0 12px;
  border-radius:8px;color:var(--ink700);font-size:14.5px;
  transition:background .18s ease,color .18s ease;position:relative;
}
.nav-item:hover{background:#F2EFE9;color:var(--ink900);text-decoration:none}
.nav-item.active{background:var(--brand-soft);color:var(--ink900);font-weight:700}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:999px;background:var(--brand);
}
.nav-item:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.ni{width:18px;height:18px;flex:0 0 18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.side-cta{margin-top:22px;width:100%}
.cta-mini{display:none}
.side-foot{margin-top:auto;padding:22px 12px 0;border-top:1px solid var(--line)}
.side-foot p{margin:0 0 6px;font-size:13px;color:var(--ink500);line-height:1.7}

.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);align-items:center;gap:12px;
  padding:0 16px;z-index:60;
}
.burger{
  width:40px;height:40px;border-radius:8px;border:1px solid var(--line);
  background:#fff;display:flex;flex-direction:column;justify-content:center;
  align-items:center;gap:4px;cursor:pointer;padding:0;
}
.burger span{width:18px;height:2px;background:var(--ink900);border-radius:2px}
.topbar-brand{font-size:17px;font-weight:800;color:var(--ink900);margin-right:auto}
.topbar-cta{
  height:36px;display:inline-flex;align-items:center;padding:0 14px;
  border-radius:8px;background:var(--brand);color:#fff;font-size:14px;font-weight:600;
}
.topbar-cta:hover{background:var(--brand-deep);color:#fff;text-decoration:none}
.overlay{
  position:fixed;inset:0;background:rgba(16,18,21,.45);z-index:65;
  opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease;
}
.overlay.show{opacity:1;visibility:visible}

.app{margin-left:var(--nav-w);padding:0 40px;min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1200px;margin:0 auto}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;
  cursor:pointer;white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh1)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink900)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep)}
.btn-light{background:#fff;color:var(--ink900)}
.btn-light:hover{background:#F2EFE9;transform:translateY(-1px)}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}

.tag{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:999px;font-size:12.5px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-deep);
}
.tag-green{background:var(--accent-soft);color:var(--accent)}
.tag-line{background:#fff;border:1px solid var(--line);color:var(--ink500);font-weight:500}
.tag-yellow{background:#FDF3D6;color:#8A6600}

.section{padding:var(--sec) 0}
.section-tight{padding:44px 0}
.sec-head{max-width:760px;margin-bottom:32px}
.sec-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:-.3px;margin-bottom:10px}
.sec-head p{color:var(--ink500);font-size:15px;line-height:1.8}

/* ============ 首页顶部（内页横幅） ============ */
.page-hero{
  position:relative;margin-top:36px;border-radius:18px;overflow:hidden;
  min-height:210px;padding:40px;display:flex;flex-direction:column;justify-content:center;
  color:#fff;background:var(--ink900) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(92deg,rgba(16,18,21,.88),rgba(16,18,21,.52) 62%,rgba(16,18,21,.34));
}
.page-hero>*{position:relative;z-index:1}
.crumb{font-size:13px;color:rgba(255,255,255,.68);margin-bottom:14px}
.crumb a{color:rgba(255,255,255,.68)}
.crumb a:hover{color:#fff;text-decoration:none}
.crumb span{margin:0 6px;opacity:.6}
.page-hero h1{font-size:clamp(26px,3.2vw,40px);font-weight:800;color:#fff;letter-spacing:-.5px;margin-bottom:12px}
.page-hero .hero-sub{margin:0;font-size:15.5px;color:var(--inv);max-width:640px;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.page-hero .tag{background:rgba(255,255,255,.14);color:#fff}

/* ============ 说明段 ============ */
.lede{max-width:880px}
.lede p{margin-bottom:1.1em;font-size:16.5px;line-height:1.9;color:var(--ink700)}
.lede p:last-child{margin-bottom:0}
.lede .hl{color:var(--ink900);font-weight:700}

/* ============ 适用情形卡 ============ */
.situation-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.situation{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh1);transition:transform .22s ease,box-shadow .22s ease;
}
.situation:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.situation .num{font-size:13px;font-weight:800;color:var(--brand);letter-spacing:1.4px}
.situation h3{font-size:18px;font-weight:600;margin:10px 0 8px}
.situation p{font-size:14.5px;color:var(--ink500);line-height:1.8}

/* ============ 图文交替流程 ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center;margin-bottom:56px}
.split:last-child{margin-bottom:0}
.split.reverse .split-media{order:2}
.split-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:#fff;box-shadow:var(--sh1);
}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split-body .step-no{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-deep);font-size:12.5px;font-weight:700;letter-spacing:.6px;
}
.split-body h3{font-size:20px;font-weight:600;margin:14px 0 12px}
.split-body p{font-size:15.5px;line-height:1.85;color:var(--ink700);margin-bottom:14px}
.split-body ul{display:grid;gap:8px}
.split-body li{
  position:relative;padding-left:20px;font-size:14.5px;color:var(--ink500);line-height:1.75;
}
.split-body li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;
  background:var(--brand);opacity:.85;
}

/* ============ 判定对照列表 ============ */
.result-list{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);
  overflow:hidden;box-shadow:var(--sh1);
}
.result-row{
  display:grid;grid-template-columns:250px 1fr;gap:24px;
  padding:22px 26px;border-bottom:1px solid var(--line);
}
.result-row:last-child{border-bottom:0}
.result-row .k{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:var(--ink900)}
.dot{width:9px;height:9px;border-radius:50%;flex:0 0 9px}
.dot-green{background:var(--accent)}
.dot-yellow{background:var(--yellow)}
.dot-orange{background:var(--brand)}
.dot-gray{background:#9AA0A8}
.result-row .v{margin:0;font-size:15px;color:var(--ink700);line-height:1.85}

/* ============ 中部 CTA ============ */
.cta-band{
  background:var(--ink900);border-radius:18px;padding:42px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--sh2);
}
.cta-band h3{color:#fff;font-size:clamp(20px,2.2vw,26px);font-weight:700;margin-bottom:10px;letter-spacing:-.3px}
.cta-band p{color:var(--inv);font-size:15px;margin:0;max-width:560px;line-height:1.8}
.cta-band .tag{background:rgba(242,183,5,.16);color:var(--yellow);margin-bottom:14px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line);max-width:920px}
.faq details{position:relative;border-bottom:1px solid var(--line);padding:0}
.faq details[open]::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:999px;background:var(--brand);
}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 48px 20px 18px;font-size:16px;font-weight:700;color:var(--ink900);
  transition:color .18s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand-deep)}
.faq summary::after{
  content:"";position:absolute;right:16px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--ink500);border-bottom:2px solid var(--ink500);
  transform:translateY(-75%) rotate(45deg);transition:transform .22s ease;
}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq summary:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq .ans{padding:0 48px 22px 18px;font-size:15px;line-height:1.85;color:var(--ink700)}

/* ============ 尾部联系 ============ */
.contact-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:36px 38px;display:grid;grid-template-columns:1.3fr 1fr;gap:36px;
  box-shadow:var(--sh1);align-items:center;
}
.contact-panel h3{font-size:22px;font-weight:700;margin-bottom:12px}
.contact-panel p{font-size:15px;color:var(--ink500);line-height:1.85}
.contact-meta{display:grid;gap:12px}
.contact-meta div{
  display:flex;justify-content:space-between;gap:16px;
  padding:12px 16px;border-radius:10px;background:var(--paper);
  font-size:14px;color:var(--ink700);
}
.contact-meta span:first-child{color:var(--ink500)}

/* ============ 页脚 ============ */
.footer{background:var(--ink900);color:var(--inv);margin-top:24px;border-radius:18px 18px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;
  padding:64px 0 40px;
}
.footer-brand{font-size:19px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:320px}
.footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-list{display:grid;gap:10px}
.footer-list a{color:var(--inv);font-size:14px}
.footer-list a:hover{color:#fff;text-decoration:none}
.footer-contact span{font-size:14px;color:rgba(255,255,255,.7)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;
  text-align:center;font-size:13px;color:rgba(255,255,255,.55);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .app{padding:0 28px}
  .situation-grid{grid-template-columns:repeat(2,1fr)}
  .split{gap:30px}
  .cta-band{padding:36px}
}
@media (max-width:1023px){
  :root{--nav-w:80px}
  .sidenav{padding:22px 10px 18px;align-items:center}
  .brand{padding:0}
  .brand-full{display:none}
  .brand-mini{display:block}
  .brand-sub{display:none}
  .side-nav{width:100%;margin-top:22px}
  .nav-item{justify-content:center;padding:0;gap:0}
  .nav-item span{display:none}
  .nav-item.active::before{left:-10px}
  .side-cta{padding:0;font-size:13px}
  .cta-full{display:none}
  .cta-mini{display:inline}
  .side-foot{display:none}
  .split{grid-template-columns:1fr;gap:24px}
  .split.reverse .split-media{order:0}
  .contact-panel{grid-template-columns:1fr;gap:24px}
}
@media (max-width:767px){
  :root{--sec:44px}
  .topbar{display:flex}
  .sidenav{
    width:82%;max-width:320px;padding:26px 18px;
    align-items:stretch;transform:translateX(-100%);
    transition:transform .28s ease;box-shadow:0 10px 40px -12px rgba(16,18,21,.5);
  }
  .sidenav.open{transform:translateX(0)}
  .brand{padding:0 12px}
  .brand-full{display:block}
  .brand-mini{display:none}
  .brand-sub{display:block}
  .nav-item{justify-content:flex-start;padding:0 12px;gap:10px}
  .nav-item span{display:inline}
  .nav-item.active::before{left:0}
  .side-cta{padding:0 22px;font-size:15px}
  .cta-full{display:inline}
  .cta-mini{display:none}
  .side-foot{display:block;padding-left:12px;padding-right:12px}
  .app{margin-left:0;padding:56px 20px 0}
  .page-hero{margin-top:22px;padding:28px 22px;min-height:190px;border-radius:14px}
  .situation-grid{grid-template-columns:1fr}
  .result-row{grid-template-columns:1fr;gap:8px;padding:18px 20px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;gap:22px}
  .cta-actions{width:100%}
  .faq summary{padding:18px 44px 18px 16px}
  .faq .ans{padding:0 24px 20px 16px}
  .contact-panel{padding:26px 22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 28px}
  .footer-desc{max-width:none}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .cta-actions .btn,.page-hero .btn-row .btn{width:100%}
  .page-hero h1{font-size:26px}
  .sec-head h2{font-size:22px}
  .lede p{font-size:15.5px}
}

/* roulang page: category5 */
:root{
  --brand:#FF4D14;
  --brand-dark:#C93A0C;
  --brand-soft:#FFF1E8;
  --accent:#1E6F5C;
  --accent-soft:#E9F4EF;
  --yellow:#F2B705;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --line:#E3E1DB;
  --ink-900:#101215;
  --ink-700:#2C3037;
  --ink-500:#5A6069;
  --inverse:rgba(255,255,255,.82);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,18,21,.06),0 8px 24px -12px rgba(16,18,21,.18);
  --sh-2:0 10px 32px -14px rgba(16,18,21,.28);
  --side-w:236px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--paper);
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--brand-dark);}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.32;}
h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;}
h3{font-size:19px;font-weight:600;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.skip-link{position:absolute;left:-9999px;top:0;}
.skip-link:focus{left:12px;top:12px;background:#fff;padding:8px 14px;border-radius:8px;z-index:200;}

/* ---------- 顶部移动导航 ---------- */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:60;
  height:56px;
  align-items:center;
  gap:12px;
  padding:0 14px;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(180%) blur(8px);
}
.menu-btn{
  width:40px;height:40px;border-radius:8px;border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
}
.menu-btn svg{width:20px;height:20px;fill:none;stroke:var(--ink-900);stroke-width:1.8;stroke-linecap:round;}
.menu-btn:hover{border-color:var(--brand);}
.topbar-brand{font-size:16px;font-weight:800;color:var(--ink-900);margin-right:auto;}
.topbar-cta{
  height:36px;padding:0 14px;border-radius:8px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;display:inline-flex;align-items:center;white-space:nowrap;
}
.topbar-cta:hover{background:var(--brand-dark);color:#fff;}

/* ---------- 左侧竖栏 ---------- */
.sidenav{
  position:fixed;
  left:0;top:0;bottom:0;
  width:var(--side-w);
  background:var(--surface);
  border-right:1px solid var(--line);
  padding:24px 16px 20px;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  z-index:80;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 4px 18px;margin-bottom:14px;border-bottom:1px solid var(--line);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(135deg,var(--brand),#FF7A3D);
  color:#fff;font-size:13px;font-weight:800;letter-spacing:.04em;
  display:flex;align-items:center;justify-content:center;
}
.brand-text strong{display:block;font-size:16px;font-weight:800;color:var(--ink-900);line-height:1.2;}
.brand-text em{display:block;font-style:normal;font-size:12px;color:var(--ink-500);margin-top:3px;line-height:1.4;}
.nav-list{display:flex;flex-direction:column;gap:4px;}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:40px;padding:0 12px;border-radius:8px;
  font-size:14.5px;color:var(--ink-700);
  transition:background .16s ease,color .16s ease;
}
.nav-item:hover{background:#F4F2ED;color:var(--ink-900);text-decoration:none;}
.nav-item.active{background:var(--brand-soft);color:var(--ink-900);font-weight:700;}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;background:var(--brand);border-radius:0 3px 3px 0;
}
.ni{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.side-cta{
  margin-top:20px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 18px;border-radius:var(--r-btn);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  transition:background .18s ease,transform .18s ease;
}
.side-cta svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.side-cta:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);text-decoration:none;}
.side-foot{margin-top:auto;padding-top:20px;font-size:12.5px;color:var(--ink-500);line-height:1.7;}
.side-foot p{margin:0 0 2px;}
.scrim{display:none;}

/* ---------- 内容区 ---------- */
.layout{margin-left:var(--side-w);padding:0 40px;}
.container{width:100%;max-width:1200px;margin:0 auto;}
.section{padding:72px 0;}
.section:first-of-type{padding-top:24px;}

/* ---------- 压缩横幅 ---------- */
.page-hero{
  position:relative;
  border-radius:18px;
  overflow:hidden;
  min-height:220px;
  display:flex;
  align-items:center;
  padding:32px 36px;
  background:#101215 url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  color:#fff;
  box-shadow:var(--sh-1);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(16,18,21,.78),rgba(16,18,21,.56));
}
.hero-inner{position:relative;z-index:1;max-width:820px;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:12px;flex-wrap:wrap;}
.crumbs a{color:rgba(255,255,255,.86);}
.crumbs a:hover{color:#fff;text-decoration:underline;}
.crumbs span[aria-current]{color:rgba(255,255,255,.72);}
.page-hero h1{color:#fff;font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:.01em;}
.hero-sub{color:rgba(255,255,255,.86);font-size:16px;margin:10px 0 0;max-width:720px;}
.hero-actions{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
a.btn:hover{text-decoration:none;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:none;}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px);}
.btn-ghost:active{transform:none;}
.btn-light{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.42);color:#fff;}
.btn-light:hover{background:rgba(255,255,255,.24);border-color:#fff;color:#fff;transform:translateY(-1px);}
.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;}

/* ---------- 说明卡 ---------- */
.note-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.note-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 26px 26px 30px;
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.note-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);}
.note-num{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;
  color:var(--brand-dark);background:var(--brand-soft);
  padding:3px 10px;border-radius:999px;margin-bottom:12px;
}
.note-card h2{font-size:20px;margin-bottom:10px;}
.note-card p{font-size:15.5px;color:var(--ink-700);}

/* ---------- 面板与步骤 ---------- */
.panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  padding:36px;
  box-shadow:var(--sh-1);
}
.sec-head{margin-bottom:28px;}
.sec-head p{color:var(--ink-500);font-size:15px;margin:8px 0 0;}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.steps li{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.steps li:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.step-no{
  display:inline-block;font-size:12px;font-weight:700;
  color:var(--brand-dark);background:var(--brand-soft);
  border-radius:999px;padding:3px 10px;
}
.steps li h3{font-size:18px;margin:12px 0 8px;}
.steps li p{font-size:15px;color:var(--ink-700);margin:0;}

/* ---------- 图文块 ---------- */
.media-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:44px;
  align-items:center;
  margin-bottom:56px;
}
.media-row:last-child{margin-bottom:0;}
.media-row.flip .media-img{order:2;}
.media-img img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-img);
  box-shadow:var(--sh-1);
  transition:box-shadow .18s ease,transform .18s ease;
}
.media-img img:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.media-body h3{font-size:21px;margin-bottom:12px;}
.media-body > p{font-size:15.5px;}
.check-list{margin:14px 0 0;}
.check-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:10px;
  font-size:15.5px;
  color:var(--ink-700);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:10px;
  width:13px;height:7px;
  border-left:2px solid var(--accent);
  border-bottom:2px solid var(--accent);
  transform:rotate(-45deg);
}
.btn-row{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 准备清单 ---------- */
.prep{
  display:grid;
  grid-template-columns:.85fr 1.15fr;
  gap:40px;
  background:var(--brand-soft);
  border-radius:18px;
  padding:40px;
  align-items:start;
}
.prep-intro h2{margin-bottom:10px;}
.prep-intro p{color:#7A4A33;font-size:15px;margin:0;}
.prep-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.prep-list li{
  background:#fff;
  border:1px solid #F4DACB;
  border-radius:var(--r-card);
  padding:16px 18px;
}
.prep-list strong{display:block;font-size:15px;color:var(--ink-900);margin-bottom:4px;}
.prep-list span{font-size:14px;color:var(--ink-500);line-height:1.7;display:block;}

/* ---------- 深色 CTA ---------- */
.cta-band{
  background:#101215;
  border-radius:18px;
  padding:40px;
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,77,20,.32),rgba(255,77,20,0) 70%);
}
.cta-band h2{color:#fff;font-size:23px;position:relative;}
.cta-band p{color:var(--inverse);font-size:15px;margin:10px 0 0;max-width:560px;position:relative;}
.cta-actions{display:flex;flex-direction:column;align-items:flex-start;gap:10px;position:relative;}
.cta-note{font-size:13px;color:rgba(255,255,255,.58);}
.badge-yellow{
  display:inline-block;font-size:12px;font-weight:700;color:#3A2A00;
  background:var(--yellow);border-radius:999px;padding:3px 10px;margin-bottom:12px;position:relative;
}

/* ---------- FAQ ---------- */
.faq{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:8px 26px;box-shadow:var(--sh-1);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-item summary{
  position:relative;
  cursor:pointer;
  list-style:none;
  padding:20px 44px 20px 16px;
  font-size:16px;
  font-weight:700;
  color:var(--ink-900);
  transition:color .16s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:14px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:600;color:var(--brand);line-height:1;
}
.faq-item summary:hover{color:var(--brand-dark);}
.faq-item[open]{box-shadow:inset 3px 0 0 var(--brand);}
.faq-item[open] summary{color:var(--brand-dark);}
.faq-item[open] summary::after{content:"−";}
.faq-body{padding:0 44px 22px 16px;font-size:15px;line-height:1.8;color:var(--ink-700);}
.faq-body p{margin:0;}

/* ---------- 页脚 ---------- */
.footer{
  background:#101215;
  border-radius:18px;
  padding:48px 0 0;
  color:rgba(255,255,255,.74);
  margin:24px 0 24px;
}
.footer .container{padding:0 32px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{font-size:20px;font-weight:800;color:#fff;margin-bottom:10px;}
.footer-desc{font-size:14px;line-height:1.75;color:rgba(255,255,255,.62);margin:0;}
.footer h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:700;}
.footer-list li{margin-bottom:10px;font-size:14px;}
.footer-list li:last-child{margin-bottom:0;}
.footer-list a{color:rgba(255,255,255,.72);}
.footer-list a:hover{color:#fff;text-decoration:underline;}
.footer-contact span{color:rgba(255,255,255,.6);}
.footer-bottom{padding:20px 0 28px;text-align:center;font-size:13px;color:rgba(255,255,255,.5);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1000px;}
  .media-row{gap:32px;}
}
@media (max-width:1023px){
  :root{--side-w:80px;}
  .layout{margin-left:var(--side-w);padding:0 28px;}
  .sidenav{width:80px;padding:20px 10px;}
  .brand{flex-direction:column;gap:8px;padding:0 0 16px;}
  .brand-text{display:none;}
  .nav-item{justify-content:center;padding:0;}
  .nav-item span{display:none;}
  .side-cta{width:44px;height:44px;padding:0;justify-content:center;}
  .side-cta span{display:none;}
  .side-foot{display:none;}
  .steps{grid-template-columns:1fr;}
  .media-row{grid-template-columns:1fr;gap:24px;margin-bottom:44px;}
  .media-row.flip .media-img{order:0;}
  .prep{grid-template-columns:1fr;padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .topbar{display:flex;}
  .sidenav{
    width:82%;max-width:320px;padding:24px 16px;
    transform:translateX(-100%);
    transition:transform .26s ease;
    box-shadow:none;
    align-items:stretch;
    z-index:90;
  }
  .sidenav.open{transform:translateX(0);box-shadow:var(--sh-2);}
  .sidenav .brand{flex-direction:row;gap:10px;padding:0 4px 16px;}
  .sidenav .brand-text{display:block;}
  .sidenav .nav-item{justify-content:flex-start;padding:0 12px;}
  .sidenav .nav-item span{display:inline;}
  .sidenav .side-cta{width:100%;height:44px;padding:0 18px;justify-content:center;}
  .sidenav .side-cta span{display:inline;}
  .sidenav .side-foot{display:block;}
  .scrim{
    display:block;position:fixed;inset:0;background:rgba(16,18,21,.45);
    opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease;z-index:85;
  }
  .scrim.show{opacity:1;visibility:visible;}
  .layout{margin-left:0;padding:0 16px;}
  .section{padding:44px 0;}
  .section:first-of-type{padding-top:16px;}
  .page-hero{min-height:190px;padding:26px 22px;border-radius:14px;}
  .note-grid{grid-template-columns:1fr;}
  .panel{padding:24px;}
  .faq{padding:6px 16px;}
  .cta-band{padding:28px;}
  .cta-inner{gap:20px;}
  .prep-list{grid-template-columns:1fr;}
  .footer{padding-top:36px;}
  .footer .container{padding:0 20px;}
}
@media (max-width:520px){
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .btn-row{flex-direction:column;}
  .btn-row .btn{width:100%;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  h3{font-size:18px;}
}