/* roulang page: index */
:root{
  --ink:#101318;
  --ink-soft:#1b2028;
  --flame:#FF5A26;
  --flame-dark:#D93F10;
  --sand:#F7F5F1;
  --card:#FFFFFF;
  --line:#E5E0D6;
  --muted:#6E6A62;
  --text:#2C3038;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --radius-card:16px;
  --radius-img:14px;
  --radius-pill:999px;
  --radius-input:12px;
  --shadow-1:0 1px 2px rgba(16,19,24,.04);
  --shadow-2:0 12px 32px -16px rgba(16,19,24,.18);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --sidebar-w:236px;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color var(--t);}
a:hover{color:var(--flame);}
h1,h2,h3,h4,p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--flame);outline-offset:3px;}
::selection{background:rgba(255,90,38,.22);}

/* 覆盖 Foundation 默认色 */
.button,.button:focus,.button:hover{background:var(--flame);border-radius:var(--radius-pill);}
a.button{color:#fff;}
.menu a{color:inherit;}
input,select,textarea{font-family:inherit;}

/* ============ 布局容器 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1280px;}}
@media (max-width:639px){.container{padding:0 18px;}}

/* ============ 左侧固定导航 ============ */
.site-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--ink);z-index:60;
  display:flex;flex-direction:column;
  padding:26px 18px 22px;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:12px;padding:0 6px;}
.brand-mark{
  flex:0 0 auto;width:42px;height:42px;border-radius:12px;
  background:var(--flame);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;letter-spacing:-.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;font-weight:700;color:#fff;letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:12px;color:rgba(255,255,255,.55);letter-spacing:.14em;margin-top:3px;}
.side-nav{margin-top:34px;display:flex;flex-direction:column;gap:4px;}
.nav-item{
  position:relative;display:flex;align-items:center;height:44px;padding:0 14px;
  border-radius:10px;color:rgba(255,255,255,.7);font-size:15px;
  transition:background var(--t),color var(--t);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--flame);
  transition:height var(--t);
}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.nav-item.active{background:rgba(255,255,255,.09);color:#fff;font-weight:600;}
.nav-item.active::before{height:20px;}
.side-foot{margin-top:auto;padding-top:26px;}
.side-foot .btn{width:100%;justify-content:center;}
.side-contact{
  margin-top:14px;font-size:12px;line-height:1.7;color:rgba(255,255,255,.45);
  border-top:1px solid rgba(255,255,255,.1);padding-top:14px;
}

/* ============ 移动端顶栏与抽屉 ============ */
.mobile-topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  background:var(--ink);align-items:center;justify-content:space-between;
  padding:0 18px;
}
.mobile-topbar .brand{padding:0;gap:10px;}
.mobile-topbar .brand-mark{width:36px;height:36px;border-radius:10px;font-size:16px;}
.mobile-topbar .brand-text strong{font-size:15px;}
.mobile-topbar .brand-text em{font-size:11px;}
.burger{
  width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.18);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:background var(--t),border-color var(--t);
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:rgba(255,255,255,.85);transition:transform var(--t),opacity var(--t);}
.burger:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.32);}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:90;
  background:var(--ink);padding:26px 20px;
  transform:translateX(100%);
  transition:transform 280ms cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-head .brand{padding:0;}
.drawer-close{width:38px;height:38px;border-radius:10px;color:rgba(255,255,255,.8);font-size:22px;line-height:1;border:1px solid rgba(255,255,255,.18);transition:background var(--t);}
.drawer-close:hover{background:rgba(255,255,255,.08);}
.drawer-foot{margin-top:auto;padding-top:26px;}
.drawer-foot .btn{width:100%;justify-content:center;}
.mobile-overlay{
  position:fixed;inset:0;background:rgba(16,19,24,.55);z-index:80;
  opacity:0;visibility:hidden;transition:opacity 240ms ease,visibility 240ms ease;
}
.mobile-overlay.is-open{opacity:1;visibility:visible;}

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

/* ============ 通用按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  border:1px solid transparent;background:transparent;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.btn .arrow{display:inline-block;transition:transform var(--t);}
.btn:hover .arrow{transform:translateX(4px);}
.btn-flame{background:var(--flame);color:#fff;}
.btn-flame:hover{background:var(--flame-dark);color:#fff;}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35);}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1);color:#fff;}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-outline:hover{border-color:var(--ink);color:var(--ink);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn:active{transform:translateY(1px);}

/* ============ 板块通用 ============ */
.section{padding:96px 0;}
.section-head{margin-bottom:44px;max-width:720px;}
.section-head.between{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;
  color:var(--flame);margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(26px,3vw,38px);line-height:1.22;font-weight:700;
  letter-spacing:-.01em;color:var(--ink);
}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px;}
.text-link{font-size:14px;font-weight:600;color:var(--flame);white-space:nowrap;}
.text-link:hover{color:var(--flame-dark);text-decoration:underline;}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;background:var(--ink);padding:104px 0 60px;}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(16,19,24,.94) 0%,rgba(16,19,24,.82) 46%,rgba(16,19,24,.58) 100%);
}
.hero-inner{position:relative;z-index:2;color:#fff;}
.hero-tag{
  display:inline-block;font-size:12px;letter-spacing:.08em;font-weight:600;
  color:rgba(255,255,255,.82);background:rgba(255,90,38,.16);
  border:1px solid rgba(255,90,38,.42);
  padding:6px 14px;border-radius:var(--radius-pill);margin-bottom:22px;
}
.hero h1{
  font-size:clamp(34px,4.6vw,58px);line-height:1.14;font-weight:800;
  letter-spacing:-.02em;color:#fff;max-width:15em;
}
.hero-sub{
  margin-top:20px;max-width:38em;font-size:clamp(16px,1.6vw,18px);
  color:rgba(255,255,255,.75);line-height:1.75;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:12px 30px;margin-top:46px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
}
.hero-trust li{position:relative;padding-left:16px;font-size:13.5px;color:rgba(255,255,255,.72);}
.hero-trust li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--flame);
}

/* ============ 痛点提问区 ============ */
.pain-section{background:var(--sand);}
.pain-grid{row-gap:0;}
.pain-item{
  display:flex;gap:22px;align-items:flex-start;
  padding:30px 4px 30px 0;border-bottom:1px solid var(--line);height:100%;
}
.pain-num{
  flex:0 0 auto;font-size:clamp(38px,4.2vw,56px);font-weight:800;line-height:1;
  color:var(--flame);font-variant-numeric:tabular-nums;letter-spacing:-.03em;opacity:.92;
}
.pain-body h3{font-size:19px;line-height:1.45;font-weight:700;color:var(--ink);}
.pain-body p{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.8;}

/* ============ 方案卡片区 ============ */
.plan-section{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.plan-card{
  position:relative;height:100%;display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t);
}
.plan-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:var(--flame);opacity:0;transition:opacity var(--t);
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.plan-card:hover::after{opacity:1;}
.plan-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EDE9E1;}
.plan-media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.plan-media::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(16,19,24,.05),rgba(16,19,24,.34));z-index:1;
}
.plan-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1;}
.plan-index{
  font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--flame);
  font-variant-numeric:tabular-nums;
}
.plan-body h3{margin-top:10px;font-size:22px;line-height:1.35;font-weight:700;color:var(--ink);}
.plan-body > p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.8;}
.plan-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.plan-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text);}
.plan-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:2px;
  background:var(--flame);border-radius:2px;
}
.plan-enter{
  margin-top:auto;padding-top:22px;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--ink);
}
.plan-enter .arrow{transition:transform var(--t);}
.plan-card:hover .plan-enter{color:var(--flame);}
.plan-card:hover .plan-enter .arrow{transform:translateX(4px);}

/* ============ 数据带 ============ */
.stats-band{background:var(--ink);padding:78px 0;color:#fff;}
.stats-band .section-head h2{color:#fff;}
.stats-band .section-head p{color:rgba(255,255,255,.65);}
.stat{padding:22px 0;border-top:1px solid rgba(255,255,255,.14);}
.stat-num{
  font-size:clamp(34px,4vw,52px);font-weight:800;line-height:1.05;
  color:var(--flame);font-variant-numeric:tabular-nums;letter-spacing:-.03em;
}
.stat-num .unit{font-size:.5em;font-weight:700;margin-left:4px;color:rgba(255,255,255,.85);}
.stat p{margin-top:12px;font-size:14px;color:rgba(255,255,255,.72);}

/* ============ 最新信息（CMS） ============ */
.news-section{background:var(--sand);}
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px 22px;box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCD5C8;color:inherit;}
.post-badge{
  align-self:flex-start;font-size:12px;letter-spacing:.06em;font-weight:600;
  color:var(--ink);background:rgba(16,19,24,.06);
  padding:4px 12px;border-radius:var(--radius-pill);
}
.post-title{
  margin-top:16px;font-size:18px;line-height:1.45;font-weight:700;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-sum{
  margin-top:12px;font-size:14.5px;line-height:1.8;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.post-card:hover .post-foot .arrow{transform:translateX(4px);}
.post-foot .arrow{display:inline-block;transition:transform var(--t);color:var(--flame);}
.news-empty{
  border:1px dashed #CFC7B8;border-radius:var(--radius-card);
  padding:56px 28px;text-align:center;background:rgba(255,255,255,.6);
}
.news-empty p{font-size:15px;color:var(--muted);}
.news-empty .btn{margin-top:20px;}

/* ============ 联系 / 表单 ============ */
.contact-section{background:#fff;border-top:1px solid var(--line);}
.contact-section h2{font-size:clamp(26px,3vw,36px);line-height:1.25;font-weight:700;color:var(--ink);}
.contact-section .lead{margin-top:16px;color:var(--muted);font-size:15.5px;max-width:34em;}
.contact-points{margin-top:28px;display:flex;flex-direction:column;gap:14px;}
.contact-points li{position:relative;padding-left:20px;font-size:15px;color:var(--text);}
.contact-points li::before{
  content:"";position:absolute;left:0;top:.8em;width:8px;height:2px;border-radius:2px;background:var(--flame);
}
.contact-panel{
  background:var(--sand);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;
}
.panel-head{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;}
.panel-head p{font-size:15px;color:var(--text);max-width:22em;}
.lead-form{
  max-height:0;overflow:hidden;opacity:0;
  transition:max-height 360ms cubic-bezier(.2,.7,.3,1),opacity 260ms ease,margin-top 260ms ease;
}
.lead-form.is-open{max-height:900px;opacity:1;margin-top:26px;}
.form-row{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.form-row label{font-size:13.5px;font-weight:600;color:var(--ink);}
.form-row input,.form-row select,.form-row textarea{
  width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--radius-input);
  padding:12px 14px;font-size:15px;color:var(--text);
  transition:border-color var(--t),box-shadow var(--t);appearance:none;
}
.form-row textarea{min-height:112px;resize:vertical;line-height:1.7;}
.form-row input::placeholder,.form-row textarea::placeholder{color:#A9A296;}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:none;border-color:var(--flame);box-shadow:0 0 0 3px rgba(255,90,38,.14);
}
.lead-form .btn{width:100%;}
.privacy-note{
  margin-top:16px;display:flex;gap:8px;align-items:flex-start;
  font-size:13px;line-height:1.7;color:var(--muted);
}
.privacy-note svg{flex:0 0 auto;margin-top:2px;}

/* ============ FAQ ============ */
.faq-section{background:var(--sand);border-top:1px solid var(--line);}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:24px 44px 24px 0;position:relative;
  font-size:17px;font-weight:600;color:var(--ink);transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:6px;top:50%;width:14px;height:2px;
  background:var(--flame);transform:translateY(-50%);transition:transform var(--t),opacity var(--t);
}
.faq-item summary::before{
  content:"";position:absolute;right:12px;top:50%;width:2px;height:14px;
  background:var(--flame);transform:translateY(-50%);transition:transform var(--t),opacity var(--t);
}
.faq-item[open] summary{color:var(--flame);}
.faq-item[open] summary::before{transform:translateY(-50%) scaleY(0);opacity:0;}
.faq-item summary:hover{color:var(--flame);}
.faq-body{padding:0 44px 26px 0;font-size:15.5px;line-height:1.85;color:var(--muted);}

/* ============ CTA 条 ============ */
.cta-strip{background:var(--ink-soft);padding:44px 0;}
.cta-strip .inner{
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
}
.cta-strip h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:#fff;line-height:1.4;}
.cta-strip p{margin-top:8px;font-size:14.5px;color:rgba(255,255,255,.68);}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 30px;}
.site-footer .brand-text strong{font-size:16px;}
.footer-desc{margin-top:20px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.55);max-width:30em;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.02em;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.65);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ============ 进场动效 ============ */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity 460ms ease,transform 460ms cubic-bezier(.2,.7,.3,1);}
.js .reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1023.98px){
  .site-sidebar{display:none;}
  .mobile-topbar{display:flex;}
  .site-main{margin-left:0;padding-top:60px;}
  .section{padding:72px 0;}
  .hero{padding:72px 0 52px;}
}
@media (max-width:639.98px){
  .section{padding:56px 0;}
  .hero{padding:56px 0 44px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-trust{gap:10px 20px;}
  .pain-item{gap:16px;padding:24px 0;}
  .plan-body{padding:22px 20px 24px;}
  .contact-panel{padding:22px 18px;}
  .panel-head .btn{width:100%;}
  .cta-strip .inner .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1 !important;transform:none !important;}
}

/* roulang page: article */
:root{
  --ink:#101318;
  --ink-soft:#191d24;
  --flame:#FF5A26;
  --flame-dark:#D93F10;
  --sand:#F7F5F1;
  --card:#FFFFFF;
  --line:#E5E0D6;
  --muted:#6E6A62;
  --text:#2C3038;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:999px;
  --radius-input:12px;
  --shadow-1:0 1px 2px rgba(16,19,24,.04);
  --shadow-2:0 12px 32px -16px rgba(16,19,24,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-w:236px;
  --gap-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--sand);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease)}
a:hover{color:var(--flame-dark)}
h1,h2,h3,h4,h5,h6{font-family:inherit;color:var(--ink);margin:0;font-weight:700;line-height:1.25}
p{margin:0 0 18px}
ul,ol{margin:0;padding:0;list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--flame);outline-offset:2px;border-radius:4px}
input,textarea{width:100%;height:48px;padding:0 16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-input);transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease)}
textarea{height:auto;min-height:120px;padding:12px 16px;line-height:1.7}
input:focus,textarea:focus{outline:none;border-color:var(--flame);box-shadow:0 0 0 3px rgba(255,90,38,.14)}
::placeholder{color:#9c968a}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--flame);color:#fff;padding:10px 18px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0;color:#fff}

/* 侧栏导航 */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--ink);display:flex;flex-direction:column;
  padding:28px 20px 24px;z-index:60;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg,var(--flame),var(--flame-dark));
  color:#fff;font-weight:800;font-size:18px;letter-spacing:-.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{color:#fff;font-size:16px;font-weight:700;letter-spacing:-.01em}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.18em;color:rgba(255,255,255,.5);margin-top:2px}
.nav-list{margin-top:34px;display:flex;flex-direction:column;gap:2px}
.nav-item{
  display:flex;align-items:center;height:44px;padding:0 12px;
  border-left:3px solid transparent;border-radius:0 10px 10px 0;
  color:rgba(255,255,255,.7);font-size:15px;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.sidebar .nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{color:#fff;background:rgba(255,255,255,.08);border-left-color:var(--flame);font-weight:600}
.side-foot{margin-top:auto;padding-top:28px}
.side-cta{width:100%;justify-content:center;height:44px;font-size:14px}
.side-contact{margin-top:16px;font-size:12px;line-height:1.8;color:rgba(255,255,255,.42)}

/* 移动端顶栏 */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  background:var(--ink);align-items:center;justify-content:space-between;padding:0 18px;
}
.mobile-bar .brand-mark{width:32px;height:32px;font-size:15px;border-radius:9px}
.mobile-bar .brand-text strong{font-size:15px}
.mobile-bar .brand-text em{font-size:9px;letter-spacing:.14em}
.hamburger{
  width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.08);
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:background 180ms var(--ease);
}
.hamburger:hover{background:rgba(255,255,255,.16)}
.hamburger span{display:block;width:18px;height:2px;background:#fff;border-radius:2px}
.drawer{
  position:fixed;inset:0;background:var(--ink);z-index:90;
  display:flex;flex-direction:column;padding:22px 20px 26px;
  transform:translateX(100%);visibility:hidden;
  transition:transform 240ms var(--ease),visibility 240ms;
}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.08);color:#fff;font-size:20px;line-height:1}
.drawer-nav{margin-top:30px;display:flex;flex-direction:column;gap:4px}
.drawer-nav .nav-item{height:50px;font-size:16px;border-radius:12px}
.drawer-foot{margin-top:auto}

/* 进度条 */
.progress-bar{position:fixed;top:0;left:var(--nav-w);right:0;height:3px;z-index:55;background:transparent}
.progress-bar i{display:block;height:100%;width:0;background:var(--flame);transition:width 90ms linear}

/* 布局 */
.content-wrap{margin-left:var(--nav-w);display:flex;flex-direction:column;min-height:100vh}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
main{flex:1 0 auto}
.section-gap{padding:var(--gap-section) 0}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:10px;height:48px;padding:0 26px;
  border-radius:var(--radius-btn);font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.btn .arrow{transition:transform 180ms var(--ease);font-style:normal}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--flame);color:#fff}
.btn-primary:hover,.btn-primary:focus{background:var(--flame-dark);color:#fff}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.32)}
.btn-ghost:hover,.btn-ghost:focus{border-color:#fff;color:#fff}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-outline:hover,.btn-outline:focus{border-color:var(--flame);color:var(--flame-dark)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}

/* 面包屑 */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);padding-top:44px}
.breadcrumb .sep{color:#c8c2b4}
.breadcrumb a:hover{color:var(--flame-dark)}
.breadcrumb .current{color:var(--text);font-weight:600}

/* 文章头部 */
.article-header{padding:22px 0 34px;border-bottom:1px solid var(--line)}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(255,90,38,.1);color:var(--flame-dark);
  font-size:12px;font-weight:600;letter-spacing:.08em;
}
.article-header h1{
  margin:18px 0 0;
  font-size:clamp(30px,3.8vw,50px);
  font-weight:800;line-height:1.2;letter-spacing:-.02em;
  word-break:break-word;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-top:22px;font-size:13px;color:var(--muted)}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#cfc9bc}
.meta-row .meta-strong{color:var(--text);font-weight:600}

/* 文章布局 */
.article-layout{padding-top:52px;padding-bottom:8px}
.article-body{max-width:760px}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 22px;font-size:16.5px;line-height:1.9;color:var(--text)}
.article-body h2{
  position:relative;margin:46px 0 18px;padding-left:16px;
  font-size:clamp(22px,2.3vw,28px);line-height:1.3;font-weight:700;
}
.article-body h3{
  position:relative;margin:36px 0 14px;padding-left:14px;
  font-size:20px;line-height:1.35;font-weight:700;
}
.article-body h2::before,.article-body h3::before{
  content:"";position:absolute;left:0;top:.28em;width:3px;height:1em;
  background:var(--flame);border-radius:2px;
}
.article-body h4{margin:26px 0 12px;font-size:18px;font-weight:600;line-height:1.45}
.article-body ul,.article-body ol{margin:0 0 24px;padding-left:1.35em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:0 0 10px;line-height:1.85}
.article-body li::marker{color:var(--flame)}
.article-body blockquote{
  margin:0 0 24px;padding:18px 22px;background:#FBF7F1;
  border-left:3px solid var(--flame);border-radius:0 12px 12px 0;
  color:#4a4d55;font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:26px auto;box-shadow:var(--shadow-1)}
.article-body figure{margin:26px 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--muted)}
.article-body a{color:var(--flame-dark);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:var(--flame)}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 26px;font-size:15px}
.article-body th{background:#F1EDE5;font-weight:600;text-align:left}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;line-height:1.7}
.article-body pre{
  margin:0 0 26px;padding:16px 18px;background:#F1EDE5;border:1px solid var(--line);
  border-radius:12px;overflow-x:auto;font-size:14px;line-height:1.75;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.94em;background:#F1EDE5;padding:2px 6px;border-radius:6px}
.article-body pre code{background:none;padding:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* 侧栏面板 */
.side-panel{position:sticky;top:32px}
.panel-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);
}
.panel-card + .panel-card{margin-top:20px}
.panel-title{font-size:16px;font-weight:700;margin:0 0 6px;color:var(--ink)}
.panel-sub{font-size:13px;color:var(--muted);margin:0 0 16px}
.rec-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);transition:transform 180ms var(--ease)}
.rec-item:last-child{border-bottom:0;padding-bottom:0}
.rec-item:first-child{padding-top:0}
.rec-item:hover{transform:translateX(3px)}
.rec-thumb{flex:0 0 auto;width:74px;height:58px;border-radius:10px;object-fit:cover}
.rec-body{min-width:0}
.rec-title{font-size:14.5px;font-weight:600;line-height:1.5;color:var(--ink);margin:0 0 4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-meta{font-size:12px;color:var(--muted);letter-spacing:.04em}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--flame-dark)}
.back-link:hover{color:var(--flame)}
.back-link .arrow{transition:transform 180ms var(--ease)}
.back-link:hover .arrow{transform:translateX(-4px)}

/* 空态 */
.empty-state{
  border:1px dashed #d5cfc0;border-radius:var(--radius-card);
  background:rgba(255,255,255,.6);padding:56px 28px;text-align:center;
}
.empty-state h3{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--muted);margin-bottom:22px}

/* CTA 条 */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:var(--ink);border-radius:var(--radius-card);
  padding:34px 38px;margin:76px 0 88px;
}
.cta-bar h2{color:#fff;font-size:clamp(20px,2.2vw,26px);margin-bottom:8px}
.cta-bar p{color:rgba(255,255,255,.72);margin:0;font-size:15px}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:auto}
.site-footer .brand{margin-bottom:16px}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin:0 0 14px}
.footer-col ul li a{display:inline-block;font-size:14px;color:rgba(255,255,255,.66);line-height:2.05}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.48);
}
.footer-bottom p{margin:0}

/* 进场动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* 覆盖 Foundation 默认观感 */
.grid-x{display:flex}
.cell{min-width:0}
.button,.button:hover{background:none;color:inherit}
table{background:transparent}

@media screen and (max-width:1023px){
  .sidebar{display:none}
  .mobile-bar{display:flex}
  .content-wrap{margin-left:0;padding-top:60px}
  .progress-bar{left:0;top:60px}
  :root{--gap-section:72px}
  .breadcrumb{padding-top:30px}
  .side-panel{position:static;margin-top:44px}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:28px 24px;margin:56px 0 64px}
  .cta-bar .btn{width:100%;justify-content:center}
}
@media screen and (min-width:1024px){
  .drawer{display:none}
}
@media screen and (min-width:1440px){
  .container{max-width:1280px}
}
@media screen and (max-width:767px){
  :root{--gap-section:56px}
  .container{padding:0 18px}
  .article-header{padding:18px 0 26px}
  .article-body p{font-size:16px}
  .rec-thumb{width:64px;height:52px}
}
@media screen and (max-width:520px){
  .btn{width:100%;justify-content:center}
  .breadcrumb{font-size:12px}
  .empty-state{padding:40px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root{
  --ink:#101318;
  --ink-2:#1b2027;
  --orange:#FF5A26;
  --orange-dark:#D93F10;
  --sand:#F7F5F1;
  --card:#FFFFFF;
  --line:#E5E0D6;
  --muted:#6E6A62;
  --text:#2C3038;
  --r-card:16px;
  --r-img:14px;
  --r-pill:999px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(16,19,24,.04);
  --sh-2:0 12px 32px -16px rgba(16,19,24,.18);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --nav-w:236px;
}

/* ===== 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--sand);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.22}
h1{font-size:clamp(32px,4vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.14}
h2{font-size:clamp(26px,3vw,38px);font-weight:700}
h3{font-size:22px;line-height:1.35;font-weight:700}
h4{font-size:18px;line-height:1.45;font-weight:600}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--orange);text-decoration:none;transition:color var(--t),border-color var(--t),background-color var(--t)}
a:hover,a:focus{color:var(--orange-dark)}
button{font-family:inherit;font-size:inherit;background:none;border:0;cursor:pointer;color:inherit}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
::selection{background:rgba(255,90,38,.22)}

/* ===== 容器与栅格修正 ===== */
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media screen and (min-width:1440px){.container{max-width:1280px}}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{margin-left:12px;margin-right:12px;width:calc(100% - 24px)}
.grid-margin-x>.small-6{width:calc(50% - 24px)}
.grid-margin-y{margin-top:-12px;margin-bottom:-12px}
.grid-margin-y>.cell{margin-top:12px;margin-bottom:12px}
@media screen and (min-width:40em){
  .grid-margin-x>.medium-6{width:calc(50% - 24px)}
  .grid-margin-x>.medium-4{width:calc(33.3333% - 24px)}
}
@media screen and (min-width:64em){
  .grid-margin-x>.large-4{width:calc(33.3333% - 24px)}
  .grid-margin-x>.large-3{width:calc(25% - 24px)}
  .grid-margin-x>.large-2{width:calc(16.6667% - 24px)}
  .grid-margin-x>.large-8{width:calc(66.6667% - 24px)}
}

/* ===== 顶部 / 侧边导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;height:60px;background:var(--ink);
  display:flex;align-items:center;padding:0 18px;z-index:90;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-top{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand:hover,.brand:focus{color:#fff}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--orange);color:#fff;
  display:grid;place-items:center;font-size:17px;font-weight:800;line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:700;color:#fff;letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.55)}

.nav-toggle{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:0 11px;
  transition:var(--t);
}
.nav-toggle:hover{border-color:rgba(255,255,255,.4)}
.nav-toggle span{display:block;height:2px;background:#fff;border-radius:2px;transition:transform var(--t),opacity var(--t)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.side-nav{display:none}

.side-cta{display:none}
.side-cta .side-note{font-size:12px;color:rgba(255,255,255,.45);margin:10px 0 0;line-height:1.6}

.nav-mask{
  position:fixed;inset:0;background:rgba(16,19,24,.5);opacity:0;visibility:hidden;
  transition:opacity var(--t),visibility var(--t);z-index:86;
}
.nav-mask.is-on{opacity:1;visibility:visible}

@media screen and (max-width:1023px){
  .side-nav{
    display:flex;flex-direction:column;gap:4px;
    position:fixed;top:0;right:0;width:min(84vw,340px);height:100vh;
    background:var(--ink);padding:78px 20px 110px;overflow-y:auto;
    transform:translateX(100%);transition:transform 240ms cubic-bezier(.2,.7,.3,1);
    z-index:88;box-shadow:-18px 0 40px rgba(16,19,24,.3);
  }
  .side-nav.is-open{transform:translateX(0)}
  .side-cta{
    display:block;position:fixed;right:0;bottom:0;width:min(84vw,340px);
    background:var(--ink);padding:16px 20px 22px;z-index:89;
    border-top:1px solid rgba(255,255,255,.08);
    transform:translateX(100%);transition:transform 240ms cubic-bezier(.2,.7,.3,1);
  }
  .side-cta.is-open{transform:translateX(0)}
}

@media screen and (min-width:1024px){
  .site-header{
    right:auto;width:var(--nav-w);height:100vh;flex-direction:column;
    align-items:stretch;padding:26px 18px 22px;border-bottom:0;
    border-right:1px solid rgba(255,255,255,.06);
  }
  .header-top{display:block;width:auto}
  .nav-toggle{display:none}
  .side-nav{display:flex;flex-direction:column;gap:4px;margin-top:34px;flex:1}
  .side-cta{display:block;margin-top:auto}
}

.nav-item{
  position:relative;display:flex;align-items:center;height:44px;padding:0 14px 0 18px;
  border-radius:10px;font-size:15px;color:rgba(255,255,255,.7);
  transition:background-color 120ms ease,color 120ms ease;
}
.nav-item:hover,.nav-item:focus{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{color:#fff;background:rgba(255,255,255,.07)}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  background:var(--orange);border-radius:2px;
}

/* ===== 主体布局 ===== */
.page-main{padding-top:60px;overflow-x:hidden}
@media screen and (min-width:1024px){
  .page-main{margin-left:var(--nav-w);padding-top:0}
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);padding:13px 26px;font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.btn .arrow{transition:transform var(--t);font-style:normal}
.btn:hover .arrow,.btn:focus .arrow{transform:translateX(4px)}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover,.btn-primary:focus{background:var(--orange-dark);color:#fff}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.62);color:#fff}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover,.btn-outline:focus{border-color:var(--ink);color:var(--ink)}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-block{width:100%}

/* ===== 标签 / 胶囊 ===== */
.pill{
  display:inline-flex;align-items:center;border-radius:var(--r-pill);
  padding:5px 13px;font-size:12px;font-weight:600;letter-spacing:.06em;line-height:1.6;
}
.pill-dark{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.16)}
.pill-orange{background:rgba(255,90,38,.12);color:var(--orange-dark);border:1px solid rgba(255,90,38,.24)}
.pill-ink{background:rgba(16,19,24,.07);color:var(--ink);border:1px solid rgba(16,19,24,.1)}

/* ===== Hero ===== */
.page-hero{
  position:relative;background:var(--ink) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  color:#fff;padding:56px 0 52px;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(118deg,rgba(16,19,24,.94) 0%,rgba(16,19,24,.82) 46%,rgba(16,19,24,.66) 100%);
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:#fff;max-width:17em;margin-top:18px}
.hero-lead{color:rgba(255,255,255,.74);font-size:16.5px;line-height:1.95;max-width:46em;margin:20px 0 0}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.6)}
.breadcrumb a{color:rgba(255,255,255,.74)}
.breadcrumb a:hover,.breadcrumb a:focus{color:#fff}
.breadcrumb .sep{opacity:.45}
.breadcrumb .current{color:#fff}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.tag-link{
  display:inline-flex;align-items:center;border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.22);padding:8px 18px;font-size:14px;
  color:rgba(255,255,255,.82);transition:var(--t);
}
.tag-link:hover,.tag-link:focus{background:var(--orange);border-color:var(--orange);color:#fff}

@media screen and (min-width:1024px){
  .page-hero{padding:92px 0 84px}
  .hero-lead{font-size:17.5px}
}

/* ===== 板块 ===== */
.section{padding:56px 0}
@media screen and (min-width:640px){.section{padding:72px 0}}
@media screen and (min-width:1024px){.section{padding:96px 0}}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px;margin:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:700;
  letter-spacing:.16em;color:var(--orange-dark);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--orange);border-radius:2px}

/* ===== 分类卡片网格 ===== */
.cat-grid .cell{display:flex}
.cat-card{
  position:relative;display:flex;flex-direction:column;width:100%;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.cat-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--orange);
  opacity:0;transition:opacity var(--t);
}
.cat-card:hover,.cat-card:focus-within{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#d8d1c4}
.cat-card:hover::after,.cat-card:focus-within::after{opacity:1}
.cat-thumb{aspect-ratio:16/10;overflow:hidden;background:#eae5db}
.cat-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.2,.7,.3,1)}
.cat-card:hover .cat-thumb img{transform:scale(1.04)}
.cat-body{display:flex;flex-direction:column;flex:1;padding:20px 22px 22px}
.cat-body h3{font-size:19px;margin:14px 0 10px}
.cat-body p{color:var(--muted);font-size:15px;line-height:1.8;margin:0}
.cat-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);
}
.cat-foot .arrow{color:var(--orange);font-style:normal;transition:transform var(--t)}
.cat-card:hover .cat-foot .arrow{transform:translateX(4px)}
.cat-link{position:absolute;inset:0;z-index:3;text-indent:-9999px;overflow:hidden}

/* ===== 深色数据带 ===== */
.dark-band{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0}
.dark-band h2{color:#fff}
.dark-band .section-head p{color:rgba(255,255,255,.66)}
@media screen and (min-width:1024px){.dark-band{padding:88px 0}}
.stat{padding:22px 0;border-top:2px solid rgba(255,255,255,.12)}
.stat-num{
  font-size:clamp(32px,4vw,46px);font-weight:800;color:var(--orange);
  line-height:1.1;font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.stat-label{font-size:14px;color:rgba(255,255,255,.66);margin-top:6px}
.rank-wrap{margin-top:40px}
.rank-title{font-size:15px;color:rgba(255,255,255,.82);margin-bottom:6px;font-weight:600}
.rank-item{display:flex;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.rank-idx{width:26px;font-weight:700;color:var(--orange);font-variant-numeric:tabular-nums;font-size:14px}
.rank-name{width:auto;min-width:88px;font-size:14.5px;color:#fff}
.rank-bar{flex:1;height:6px;border-radius:var(--r-pill);background:rgba(255,255,255,.12);overflow:hidden}
.rank-bar i{display:block;height:100%;width:0;background:var(--orange);border-radius:var(--r-pill);transition:width 900ms cubic-bezier(.2,.7,.3,1)}
.rank-val{font-size:13px;color:rgba(255,255,255,.55);font-variant-numeric:tabular-nums;min-width:44px;text-align:right}

/* ===== 图文两栏 ===== */
.split{display:grid;gap:28px;align-items:center}
@media screen and (min-width:1024px){.split{grid-template-columns:1fr 1fr;gap:48px}}
.split-media{border-radius:var(--r-img);overflow:hidden;background:#eae5db;box-shadow:var(--sh-1)}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-body h2{margin-bottom:16px}
.split-body p{color:var(--muted)}
.check-list{margin-top:22px}
.check-list li{position:relative;padding-left:26px;margin-bottom:12px;color:var(--text);font-size:15.5px}
.check-list li::before{
  content:"";position:absolute;left:0;top:11px;width:12px;height:2px;background:var(--orange);border-radius:2px;
}

/* ===== 步骤流 ===== */
.steps{display:grid;gap:0;margin-top:8px}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:18px;
  padding:24px 0;border-top:1px solid var(--line);transition:var(--t);
}
.step:last-child{border-bottom:1px solid var(--line)}
.step:hover{background:rgba(255,90,38,.03)}
.step-num{
  font-size:24px;font-weight:800;color:var(--orange);font-variant-numeric:tabular-nums;line-height:1.3;
}
.step-body h3{font-size:18px;margin-bottom:8px}
.step-body p{color:var(--muted);font-size:15px;margin:0}
@media screen and (min-width:1024px){
  .step{grid-template-columns:110px 1fr;gap:28px;padding:30px 0}
  .step-num{font-size:34px}
}

/* ===== FAQ ===== */
.faq{margin-top:10px;max-width:900px}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink);transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--orange-dark)}
.faq-ind{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-ind::before,.faq-ind::after{
  content:"";position:absolute;background:var(--orange);border-radius:2px;transition:transform var(--t);
}
.faq-ind::before{top:7px;left:0;width:16px;height:2px}
.faq-ind::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] .faq-ind::after{transform:scaleY(0)}
.faq-answer{padding:0 4px 24px;max-width:800px;color:var(--muted);font-size:15.5px;line-height:1.9}

/* ===== CTA 条 ===== */
.cta-strip{
  display:flex;flex-direction:column;gap:20px;align-items:flex-start;
  background:linear-gradient(120deg,#1e242c 0%,var(--ink) 100%);
  border-radius:var(--r-card);padding:30px 26px;color:#fff;
}
.cta-strip h3{color:#fff;font-size:clamp(20px,2.2vw,26px);line-height:1.35}
.cta-strip p{color:rgba(255,255,255,.68);font-size:15px;margin:8px 0 0}
@media screen and (min-width:768px){
  .cta-strip{flex-direction:row;align-items:center;justify-content:space-between;gap:32px;padding:34px 36px}
  .cta-strip p{max-width:44em}
}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--ink);color:rgba(255,255,255,.72);
  padding:56px 0 26px;border-top:1px solid rgba(255,255,255,.08);
}
.footer-desc{color:rgba(255,255,255,.6);font-size:14px;margin-top:16px;max-width:320px}
.footer-col h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{color:rgba(255,255,255,.66);font-size:14px}
.footer-col ul a:hover,.footer-col ul a:focus{color:#fff}
.footer-bottom{
  margin-top:42px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.46);
}
.footer-bottom p{margin:0}

/* ===== 滚动进场 ===== */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms ease,transform 520ms cubic-bezier(.2,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  .rank-bar i{transition:none}
}

@media screen and (max-width:639px){
  .hero-actions .btn{width:100%}
  .breadcrumb{font-size:12px}
  .cat-body{padding:18px 18px 20px}
}

/* roulang page: category2 */
:root{
  --ink:#101318;
  --ink-soft:#1a1f27;
  --orange:#FF5A26;
  --orange-dark:#D93F10;
  --sand:#F7F5F1;
  --card:#FFFFFF;
  --line:#E5E0D6;
  --muted:#6E6A62;
  --text:#2C3038;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:999px;
  --radius-input:12px;
  --shadow-1:0 1px 2px rgba(16,19,24,.04);
  --shadow-2:0 12px 32px -16px rgba(16,19,24,.18);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --nav-w:236px;
  --container:1200px;
}

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

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}

body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--sand);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--orange-dark);}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ============ 左侧固定导航 ============ */
.side-bar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--ink);
  display:flex;
  flex-direction:column;
  padding:28px 20px 22px;
  z-index:80;
  border-right:1px solid rgba(255,255,255,.06);
}

.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:42px;height:42px;border-radius:12px;
  background:var(--orange);color:#fff;
  display:grid;place-items:center;
  font-weight:800;font-size:19px;
  flex:none;
  box-shadow:0 8px 20px -12px rgba(255,90,38,.9);
}
.brand-text strong{
  display:block;font-size:15px;color:#fff;font-weight:700;letter-spacing:.02em;line-height:1.3;
}
.brand-text em{
  display:block;font-style:normal;font-size:11px;letter-spacing:.18em;
  color:rgba(255,255,255,.5);margin-top:3px;
}

.side-nav{margin-top:34px;display:flex;flex-direction:column;gap:4px;}
.side-nav .nav-item{
  position:relative;
  display:flex;align-items:center;
  height:44px;padding:0 14px;
  border-radius:10px;
  font-size:15px;
  color:rgba(255,255,255,.7);
  transition:background var(--ease),color var(--ease);
}
.side-nav .nav-item::before{
  content:"";position:absolute;left:0;top:50%;
  width:3px;height:20px;border-radius:3px;background:var(--orange);
  transform:translateY(-50%) scaleY(0);
  transition:transform var(--ease);
}
.side-nav .nav-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.side-nav .nav-item.active{
  background:rgba(255,255,255,.09);
  color:#fff;font-weight:600;
}
.side-nav .nav-item.active::before{transform:translateY(-50%) scaleY(1);}

.side-foot{
  margin-top:auto;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.08);
}
.side-foot .btn{width:100%;justify-content:center;}
.side-contact{
  margin-top:14px;font-size:12px;line-height:1.7;color:rgba(255,255,255,.48);
}
.side-contact strong{color:rgba(255,255,255,.72);font-weight:600;}

.nav-toggle{
  display:none;
  width:42px;height:42px;border:0;border-radius:12px;
  background:rgba(255,255,255,.08);
  align-items:center;justify-content:center;
  cursor:pointer;
}
.nav-toggle span{
  display:block;width:18px;height:2px;background:#fff;border-radius:2px;position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#fff;border-radius:2px;
  transition:transform var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.nav-mask{
  position:fixed;inset:0;background:rgba(16,19,24,.55);
  opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
  z-index:75;
}
.nav-mask.is-open{opacity:1;visibility:visible;}

/* ============ 内容区 ============ */
.page{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;}
.page > main{flex:1;}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  padding:26px 0 0;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--orange-dark);}
.breadcrumb .sep{color:#c4bdb0;}
.breadcrumb .current{color:var(--ink);font-weight:600;}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  margin-top:22px;
  border-radius:24px;
  overflow:hidden;
  background-image:linear-gradient(115deg,rgba(16,19,24,.92) 0%,rgba(16,19,24,.78) 46%,rgba(16,19,24,.5) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  color:#fff;
  padding:64px 56px 56px;
}
.page-hero .tag{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:999px;
  background:rgba(255,90,38,.16);
  border:1px solid rgba(255,90,38,.42);
  color:#ffb59b;
  font-size:12px;letter-spacing:.1em;
}
.page-hero h1{
  margin-top:20px;
  font-size:clamp(30px,3.6vw,46px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-0.02em;
  color:#fff;
  max-width:14em;
}
.page-hero .lede{
  margin-top:20px;
  max-width:44em;
  font-size:16px;
  line-height:1.9;
  color:rgba(255,255,255,.74);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:28px;
  margin-top:38px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
}
.hero-meta div{font-size:13px;color:rgba(255,255,255,.62);}
.hero-meta strong{
  display:block;font-size:20px;color:#fff;font-weight:700;
  font-variant-numeric:tabular-nums;line-height:1.4;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  height:48px;padding:0 26px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn .arrow{display:inline-block;transition:transform var(--ease);}
.btn:hover .arrow{transform:translateX(4px);}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 10px 26px -16px rgba(255,90,38,.95);}
.btn-primary:hover{background:var(--orange-dark);color:#fff;}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35);}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.6);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:#000;color:#fff;}
.btn-line{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-line:hover{border-color:var(--ink);color:var(--ink);}

/* ============ 通用板块 ============ */
.section{padding-top:96px;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.16em;
  color:var(--orange-dark);font-weight:700;margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:700;line-height:1.22;
}
.section-head p{
  margin-top:16px;color:var(--muted);font-size:15.5px;line-height:1.9;
}

/* ============ 时间线步骤 ============ */
.timeline{position:relative;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;top:14px;bottom:14px;left:50%;
  width:2px;margin-left:-1px;background:var(--line);
}
.tl-item{
  display:grid;
  grid-template-columns:1fr 112px 1fr;
  align-items:start;
  margin-bottom:34px;
}
.tl-item:last-child{margin-bottom:0;}
.tl-num{
  grid-column:2;
  justify-self:center;
  width:64px;height:64px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--card);
  border:2px solid var(--line);
  color:var(--orange);
  font-weight:800;font-size:19px;
  font-variant-numeric:tabular-nums;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.tl-item:hover .tl-num{
  border-color:var(--orange);
  box-shadow:0 10px 26px -16px rgba(255,90,38,.9);
}
.tl-body{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 30px 30px;
  box-shadow:var(--shadow-1);
  position:relative;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.tl-body::after{
  content:"";position:absolute;top:0;left:22px;right:22px;height:2px;
  background:var(--orange);border-radius:2px;opacity:0;
  transition:opacity var(--ease);
}
.tl-body:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.tl-body:hover::after{opacity:1;}
.tl-body h3{font-size:20px;font-weight:700;line-height:1.4;}
.tl-body p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.9;}
.tl-body ul{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.tl-body ul li{
  position:relative;padding-left:18px;font-size:14.5px;color:var(--text);line-height:1.8;
}
.tl-body ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--orange);
}
.tl-item:nth-child(odd) .tl-body{grid-column:1;margin-right:14px;}
.tl-item:nth-child(even) .tl-body{grid-column:3;margin-left:14px;}

/* ============ 场景卡片 ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.scene-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  position:relative;
  display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease);
}
.scene-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:var(--orange);opacity:0;transition:opacity var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.scene-card:hover::after{opacity:1;}
.scene-thumb{
  aspect-ratio:16/10;
  overflow:hidden;
  background:#eceae4;
}
.scene-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.2,.7,.3,1);}
.scene-card:hover .scene-thumb img{transform:scale(1.04);}
.scene-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1;}
.badge{
  align-self:flex-start;
  display:inline-block;
  height:26px;line-height:26px;padding:0 12px;
  border-radius:999px;
  font-size:12px;letter-spacing:.06em;
  background:rgba(16,19,24,.06);
  color:var(--ink);
}
.badge.is-warm{background:rgba(255,90,38,.12);color:var(--orange-dark);}
.scene-body h3{margin-top:14px;font-size:18px;font-weight:700;line-height:1.45;}
.scene-body p{margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.85;}
.scene-link{
  margin-top:auto;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13.5px;color:var(--muted);
}
.scene-link .arrow{color:var(--orange);font-weight:700;transition:transform var(--ease);}
.scene-card:hover .scene-link .arrow{transform:translateX(4px);}

/* ============ 要点清单 ============ */
.tips-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:24px 40px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:44px 44px 40px;
  box-shadow:var(--shadow-1);
}
.tip{display:flex;gap:18px;}
.tip-num{
  flex:none;width:44px;height:44px;border-radius:12px;
  background:var(--ink);color:#fff;
  display:grid;place-items:center;
  font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
}
.tip h4{font-size:16.5px;font-weight:700;line-height:1.5;}
.tip p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.85;}

/* ============ 深色说明带 ============ */
.note-band{
  margin-top:72px;
  background:var(--ink);
  border-radius:24px;
  padding:48px 52px;
  color:rgba(255,255,255,.72);
  display:grid;grid-template-columns:1fr 1fr;gap:40px;
}
.note-band h3{color:#fff;font-size:22px;font-weight:700;line-height:1.4;}
.note-band p{margin-top:14px;font-size:14.5px;line-height:1.95;}
.note-list{display:flex;flex-direction:column;gap:14px;}
.note-list li{
  display:flex;gap:14px;font-size:14.5px;line-height:1.8;
  padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.1);
}
.note-list li:last-child{border-bottom:0;padding-bottom:0;}
.note-list span.k{
  flex:none;color:var(--orange);font-weight:700;font-variant-numeric:tabular-nums;
}

/* ============ FAQ ============ */
.faq{margin-top:8px;border-top:1px solid var(--line);}
.faq details{
  border-bottom:1px solid var(--line);
}
.faq summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 4px;
  font-size:17px;font-weight:600;color:var(--ink);
  transition:color var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--orange-dark);}
.faq .ind{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);
  display:grid;place-items:center;position:relative;
  transition:background var(--ease),border-color var(--ease);
}
.faq .ind::before,
.faq .ind::after{
  content:"";position:absolute;background:var(--ink);
  transition:transform var(--ease),background var(--ease);
}
.faq .ind::before{width:11px;height:1.5px;}
.faq .ind::after{width:1.5px;height:11px;}
.faq details[open] .ind{background:var(--orange);border-color:var(--orange);}
.faq details[open] .ind::before,
.faq details[open] .ind::after{background:#fff;}
.faq details[open] .ind::after{transform:scaleY(0);}
.faq .faq-a{
  padding:0 4px 28px;
  max-width:60em;
  font-size:15px;color:var(--muted);line-height:1.95;
  animation:fadeUp 220ms cubic-bezier(.2,.7,.3,1);
}
@keyframes fadeUp{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:translateY(0);}}

/* ============ CTA 条 ============ */
.cta-bar{
  margin-top:96px;
  background:var(--ink);
  border-radius:24px;
  padding:48px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-bar::before{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,38,.35),transparent 70%);
}
.cta-bar h2{color:#fff;font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.35;position:relative;}
.cta-bar p{margin-top:10px;color:rgba(255,255,255,.7);font-size:15px;position:relative;}
.cta-bar .btn{position:relative;flex:none;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:96px;
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:64px 0 28px;
}
.site-footer .brand-mark{width:38px;height:38px;font-size:17px;border-radius:11px;}
.site-footer .brand-text strong{font-size:15px;}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:26em;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 进场动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 560ms cubic-bezier(.2,.7,.3,1),transform 560ms cubic-bezier(.2,.7,.3,1);}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--container:1140px;}
}

@media (max-width:1023px){
  .side-bar{
    left:0;right:0;top:0;bottom:auto;
    width:auto;height:60px;
    flex-direction:row;align-items:center;justify-content:space-between;
    padding:0 18px;
    background:var(--ink);
  }
  .side-bar .brand-mark{width:34px;height:34px;font-size:16px;border-radius:10px;}
  .brand-text strong{font-size:14px;}
  .brand-text em{font-size:10px;letter-spacing:.14em;}
  .nav-toggle{display:flex;}
  .side-nav{
    position:fixed;top:0;right:0;bottom:0;
    width:min(84vw,340px);
    background:var(--ink);
    margin:0;padding:82px 20px 120px;
    transform:translateX(100%);
    transition:transform 260ms cubic-bezier(.2,.7,.3,1);
    overflow-y:auto;
    z-index:82;
  }
  .side-nav.is-open{transform:translateX(0);}
  .side-foot{
    position:fixed;right:0;bottom:0;
    width:min(84vw,340px);
    background:var(--ink);
    padding:16px 20px 24px;
    margin:0;
    transform:translateX(100%);
    transition:transform 260ms cubic-bezier(.2,.7,.3,1);
    z-index:83;
  }
  .side-foot.is-open{transform:translateX(0);}
  .page{margin-left:0;padding-top:60px;}
  .page-hero{padding:48px 32px 44px;border-radius:20px;}
  .section{padding-top:72px;}
  .tl-item{grid-template-columns:56px 1fr;}
  .timeline::before{left:27px;margin-left:0;top:10px;bottom:10px;}
  .tl-num{grid-column:1;justify-self:start;width:52px;height:52px;font-size:16px;}
  .tl-item:nth-child(odd) .tl-body,
  .tl-item:nth-child(even) .tl-body{grid-column:2;margin:0 0 0 14px;}
  .tl-body{padding:24px 24px 26px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .tips-wrap{grid-template-columns:1fr;padding:34px 30px;}
  .note-band{grid-template-columns:1fr;padding:36px 32px;gap:28px;}
  .cta-bar{padding:36px 32px;flex-direction:column;align-items:flex-start;}
  .site-footer{margin-top:72px;}
}

@media (max-width:639px){
  .container{padding-left:18px;padding-right:18px;}
  .page-hero{padding:38px 22px 34px;border-radius:18px;margin-top:16px;}
  .page-hero .lede{font-size:15px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{width:100%;justify-content:center;}
  .hero-meta{gap:18px 26px;}
  .section{padding-top:56px;}
  .section-head{margin-bottom:32px;}
  .card-grid{grid-template-columns:1fr;}
  .tl-item{margin-bottom:24px;}
  .tl-body{padding:22px 20px 24px;}
  .tl-body h3{font-size:18px;}
  .tips-wrap{padding:26px 22px;}
  .note-band{margin-top:52px;padding:30px 24px;border-radius:18px;}
  .faq summary{font-size:15.5px;padding:22px 2px;gap:16px;}
  .cta-bar{margin-top:56px;padding:30px 24px;border-radius:18px;}
  .cta-bar .btn{width:100%;justify-content:center;}
  .site-footer{padding:48px 0 24px;}
  .footer-bottom{flex-direction:column;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1 !important;transform:none !important;}
  .scene-card:hover .scene-thumb img{transform:none;}
}

/* roulang page: category3 */
:root{
  --ink:#101318;
  --ink-soft:#1a1f27;
  --orange:#FF5A26;
  --orange-dark:#D93F10;
  --sand:#F7F5F1;
  --card:#FFFFFF;
  --line:#E5E0D6;
  --muted:#6E6A62;
  --text:#2C3038;
  --r-card:16px;
  --r-img:14px;
  --r-btn:999px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(16,19,24,.04);
  --sh-2:0 12px 32px -16px rgba(16,19,24,.18);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --nav-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","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--sand);
  overflow-x:hidden;
}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:inherit;
  color:var(--ink);
  line-height:1.22;
  letter-spacing:-.01em;
}

p{margin:0 0 16px}
p:last-child{margin-bottom:0}

img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}

a{
  color:var(--ink);
  text-decoration:none;
  transition:color var(--t),background-color var(--t),border-color var(--t);
}
a:hover{color:var(--orange-dark)}

button{font-family:inherit;font-size:inherit}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible{
  outline:2px solid var(--orange);
  outline-offset:2px;
  border-radius:6px;
}

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

/* ---------- 左侧竖向导航 ---------- */
.nav-panel{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--nav-w);
  background:var(--ink);
  display:flex;
  flex-direction:column;
  padding:28px 0 24px;
  z-index:80;
  overflow-y:auto;
}

.nav-brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 22px 24px;
  border-bottom:1px solid rgba(255,255,255,.08);
}

.brand-mark{
  width:38px;
  height:38px;
  flex:0 0 38px;
  border-radius:11px;
  background:var(--orange);
  color:#fff;
  font-size:19px;
  font-weight:800;
  display:flex;
  align-items:center;
  justify-content:center;
  letter-spacing:0;
}

.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{color:#fff;font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:12px;color:rgba(255,255,255,.5);letter-spacing:.12em}

.side-nav{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:22px 0;
  background:none;
}

.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  height:44px;
  padding:0 22px;
  font-size:15px;
  color:rgba(255,255,255,.7);
  transition:background-color var(--t),color var(--t);
}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{
  color:#fff;
  font-weight:600;
  background:rgba(255,255,255,.08);
}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  bottom:9px;
  width:3px;
  border-radius:0 2px 2px 0;
  background:var(--orange);
}

.nav-foot{
  margin-top:auto;
  padding:20px 22px 0;
  border-top:1px solid rgba(255,255,255,.08);
}
.nav-foot .btn{width:100%;justify-content:center}
.nav-hint{
  margin:12px 0 0;
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(255,255,255,.45);
}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  display:none;
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:60px;
  padding:0 18px;
  align-items:center;
  justify-content:space-between;
  background:var(--ink);
  z-index:90;
}
.topbar-brand{display:flex;align-items:center;gap:10px}
.topbar-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;font-size:16px}
.topbar-brand .brand-text strong{font-size:15px}
.topbar-brand .brand-text em{font-size:11px}

.menu-btn{
  width:42px;
  height:42px;
  border:none;
  background:rgba(255,255,255,.08);
  border-radius:11px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  cursor:pointer;
}
.menu-btn span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:#fff;
  transition:transform var(--t),opacity var(--t);
}
.menu-btn.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.nav-scrim{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(16,19,24,.6);
  opacity:0;
  pointer-events:none;
  transition:opacity var(--t);
  z-index:75;
}
.nav-scrim.open{opacity:1;pointer-events:auto}

/* ---------- 主体 ---------- */
.site-main{
  margin-left:var(--nav-w);
  min-height:100vh;
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  color:#fff;
  padding:104px 0 88px;
}
.hero-bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.4;
}
.hero-veil{
  position:absolute;
  inset:0;
  background:linear-gradient(102deg,rgba(16,19,24,.95) 0%,rgba(16,19,24,.8) 48%,rgba(16,19,24,.42) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:800px}

.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.04em;
  color:rgba(255,255,255,.56);
  margin-bottom:26px;
}
.crumb a{color:rgba(255,255,255,.56)}
.crumb a:hover{color:#fff}
.crumb .sep{color:rgba(255,255,255,.3)}
.crumb .now{color:rgba(255,255,255,.9)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.1em;
  background:rgba(255,90,38,.16);
  color:#FF8B63;
  border:1px solid rgba(255,90,38,.3);
  margin-bottom:22px;
}

.hero h1{
  font-size:clamp(34px,4.6vw,58px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
  color:#fff;
  max-width:15em;
}
.hero h1 .hl{color:var(--orange)}

.hero-lead{
  margin-top:22px;
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.72);
  max-width:640px;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:34px;
}

.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:12px 32px;
  margin-top:38px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;
  color:rgba(255,255,255,.6);
  letter-spacing:.02em;
}
.hero-trust span{display:inline-flex;align-items:center;gap:8px}
.hero-trust span::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:2px;
  background:var(--orange);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn .arrow{transition:transform var(--t);display:inline-block}
.btn:hover .arrow{transform:translateX(4px)}

.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);color:#fff;box-shadow:0 10px 24px -14px rgba(217,63,16,.9)}

.btn-ghost{border-color:rgba(255,255,255,.38);color:#fff;background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.6)}

.btn-outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--orange);color:var(--orange-dark);background:#fff}

.btn-sm{padding:11px 20px;font-size:14px}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0}
.section-sm{padding:64px 0}
.bg-card{background:var(--card)}
.bg-ink{background:var(--ink);color:rgba(255,255,255,.72)}

.sec-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:44px;
}
.sec-head h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:700;
  line-height:1.22;
  max-width:16em;
}
.sec-head p{
  font-size:15px;
  color:var(--muted);
  max-width:460px;
  margin:10px 0 0;
}
.sec-kicker{
  display:block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--orange);
  font-weight:700;
  margin-bottom:10px;
}
.sec-link{
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
}
.sec-link:hover{color:var(--orange-dark);border-color:var(--orange)}

/* ---------- 标签行 ---------- */
.chip-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:28px;
}
.chip{
  display:inline-flex;
  align-items:center;
  padding:8px 16px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--line);
  font-size:13px;
  color:var(--ink);
  letter-spacing:.02em;
  transition:border-color var(--t),color var(--t),transform var(--t);
}
.chip:hover{border-color:var(--orange);color:var(--orange-dark);transform:translateY(-2px)}

.intro-box{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:32px;
  box-shadow:var(--sh-1);
}
.intro-box p{color:var(--text)}

/* ---------- 锯齿图文 ---------- */
.zig-list{border-top:1px solid var(--line)}
.zig-row{
  padding:44px 0;
  border-bottom:1px solid var(--line);
}
.zig-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-img);
  box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t);
}
.zig-row:hover .zig-media img{
  transform:translateY(-4px);
  box-shadow:var(--sh-2);
}
.zig-body{padding:8px 0}
.zig-num{
  display:block;
  font-size:32px;
  font-weight:800;
  color:var(--orange);
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
  margin-bottom:10px;
}
.zig-body h3{
  font-size:22px;
  font-weight:700;
  line-height:1.35;
  margin-bottom:14px;
}
.zig-body p{font-size:15.5px;color:var(--text)}
.zig-body .dot-list{margin-top:18px}

.dot-list li{
  position:relative;
  padding-left:20px;
  margin-bottom:10px;
  font-size:15px;
  color:var(--muted);
}
.dot-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:7px;
  height:7px;
  border-radius:2px;
  background:var(--orange);
}
.dot-list li strong{color:var(--ink);font-weight:600}

/* ---------- 数据带 ---------- */
.stat-band{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:80px 0;
}
.stat-band h2{color:#fff}
.stat-band .sec-head p{color:rgba(255,255,255,.62)}
.stat-item{
  padding:26px 24px;
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-card);
  background:rgba(255,255,255,.03);
  height:100%;
  transition:border-color var(--t),transform var(--t);
}
.stat-item:hover{border-color:rgba(255,90,38,.55);transform:translateY(-4px)}
.stat-value{
  display:block;
  font-size:clamp(34px,4vw,52px);
  font-weight:800;
  line-height:1.05;
  color:#fff;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.stat-value .unit{font-size:18px;font-weight:600;color:var(--orange);margin-left:6px}
.stat-label{
  display:block;
  margin-top:12px;
  font-size:14px;
  color:rgba(255,255,255,.62);
}

/* ---------- 检查清单 ---------- */
.check-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 28px 22px;
  box-shadow:var(--sh-1);
  height:100%;
}
.check-card h3{
  font-size:18px;
  font-weight:700;
  margin-bottom:16px;
  padding-left:12px;
  position:relative;
}
.check-card h3::before{
  content:"";
  position:absolute;
  left:0;
  top:4px;
  bottom:4px;
  width:3px;
  border-radius:2px;
  background:var(--orange);
}
.check-list li{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-top:1px solid var(--line);
  font-size:15px;
  color:var(--text);
}
.check-list li:first-child{border-top:none}
.check-list .idx{
  flex:0 0 22px;
  font-size:13px;
  font-weight:700;
  color:var(--orange);
  font-variant-numeric:tabular-nums;
  padding-top:3px;
}

/* ---------- FAQ ---------- */
.faq-list{
  border-top:1px solid var(--line);
  max-width:860px;
}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--orange-dark)}
.faq-sign{
  flex:0 0 22px;
  position:relative;
  width:22px;
  height:22px;
  margin-top:4px;
}
.faq-sign::before,
.faq-sign::after{
  content:"";
  position:absolute;
  background:var(--orange);
  border-radius:2px;
  transition:transform var(--t),opacity var(--t);
}
.faq-sign::before{left:0;top:10px;width:22px;height:2px}
.faq-sign::after{left:10px;top:0;width:2px;height:22px}
.faq-item[open] .faq-sign::after{transform:scaleY(0);opacity:0}
.faq-answer{
  padding:0 0 24px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--muted);
  max-width:760px;
}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  background:var(--ink);
  color:#fff;
  padding:52px 48px;
}
.cta-band-bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.28;
}
.cta-band-veil{
  position:absolute;
  inset:0;
  background:linear-gradient(96deg,rgba(16,19,24,.94) 0%,rgba(16,19,24,.72) 100%);
}
.cta-inner{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.cta-inner h2{
  color:#fff;
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  line-height:1.24;
}
.cta-inner p{
  margin-top:10px;
  font-size:15px;
  color:rgba(255,255,255,.7);
  max-width:520px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:72px 0 28px;
  margin-top:96px;
}
.site-footer .brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  margin-bottom:18px;
}
.site-footer .brand-text strong{color:#fff}
.footer-desc{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.58);
  max-width:320px;
}
.footer-col h4{
  color:#fff;
  font-size:14px;
  letter-spacing:.08em;
  margin-bottom:16px;
  font-weight:700;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{
  font-size:14px;
  color:rgba(255,255,255,.64);
}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{
  margin-top:52px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
}
.footer-bottom p{
  margin:0;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ---------- 进场动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity 520ms cubic-bezier(.2,.7,.3,1),transform 520ms cubic-bezier(.2,.7,.3,1);
}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  .container{max-width:1280px}
}

@media (min-width:1024px){
  .zig-row.reverse .zig-media{order:2}
  .zig-row.reverse .zig-body{order:1}
}

@media (max-width:1023px){
  .topbar{display:flex}
  .nav-scrim{display:block}
  .nav-panel{
    left:auto;
    right:0;
    width:290px;
    transform:translateX(100%);
    transition:transform 240ms cubic-bezier(.2,.7,.3,1);
    box-shadow:-18px 0 40px -24px rgba(16,19,24,.6);
  }
  .nav-panel.open{transform:translateX(0)}
  .site-main{margin-left:0}
  .hero{padding:56px 0 52px;margin-top:60px}
  .hero-trust{gap:10px 20px}
  .section{padding:72px 0}
  .section-sm{padding:52px 0}
  .cta-band{padding:40px 28px}
  .site-footer{padding:56px 0 24px;margin-top:72px}
}

@media (max-width:767px){
  body{font-size:15.5px;line-height:1.8}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section-sm{padding:44px 0}
  .hero{padding:44px 0 44px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .hero-trust{flex-direction:column;gap:8px;margin-top:28px}
  .sec-head{margin-bottom:30px}
  .intro-box{padding:22px}
  .zig-row{padding:32px 0}
  .check-card{padding:22px 20px 18px}
  .cta-band{border-radius:16px;padding:32px 22px}
  .cta-inner .btn{width:100%}
  .footer-bottom{flex-direction:column;gap:6px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --ink:#101318;
  --ink-2:#1b1f26;
  --orange:#FF5A26;
  --orange-dark:#D93F10;
  --bg:#F7F5F1;
  --card:#FFFFFF;
  --line:#E5E0D6;
  --muted:#6E6A62;
  --text:#2C3038;
  --radius-card:16px;
  --radius-img:14px;
  --radius-input:12px;
  --shadow-1:0 1px 2px rgba(16,19,24,.04);
  --shadow-2:0 12px 32px -16px rgba(16,19,24,.18);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-w:236px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--text);text-decoration:none;transition:color 180ms var(--ease);}
a:hover,a:focus{color:var(--orange-dark);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
input,select,textarea{font:inherit;font-variant-numeric:tabular-nums;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px;}
.is-hidden{display:none !important;}

/* ============ 布局容器 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1280px;}}
.page{margin-left:var(--nav-w);}
.section{padding:96px 0;}
.section-tight{padding:72px 0;}

/* ============ 左侧竖向导航 ============ */
.side-nav-wrap{
  position:fixed;top:0;left:0;width:var(--nav-w);height:100vh;
  background:var(--ink);display:flex;flex-direction:column;
  padding:26px 18px 20px;z-index:70;
}
.nav-brand{padding:0 6px 24px;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--orange);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:18px;flex:0 0 38px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{color:#fff;font-size:15px;font-weight:700;letter-spacing:.01em;}
.brand-text em{font-style:normal;color:rgba(255,255,255,.5);font-size:11px;letter-spacing:.16em;}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1 1 auto;}
.nav-item{
  position:relative;display:flex;align-items:center;height:44px;padding:0 14px;
  border-radius:10px;color:rgba(255,255,255,.7);font-size:14.5px;
  transition:background 120ms var(--ease),color 120ms var(--ease);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--orange);border-radius:0 3px 3px 0;
  transition:height 180ms var(--ease);
}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.nav-item.active{background:rgba(255,255,255,.09);color:#fff;}
.nav-item.active::before{height:22px;}
.nav-foot{padding-top:16px;border-top:1px solid rgba(255,255,255,.1);}
.nav-foot .btn{width:100%;justify-content:center;}
.nav-contact{margin:10px 0 0;font-size:12px;color:rgba(255,255,255,.42);text-align:center;letter-spacing:.02em;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:999px;
  padding:13px 24px;font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background 180ms var(--ease),color 180ms var(--ease),
             border-color 180ms var(--ease),transform 180ms var(--ease);
}
.btn .arrow{transition:transform 180ms var(--ease);font-variant-numeric:tabular-nums;}
.btn:hover .arrow{transform:translateX(4px);}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover,.btn-primary:focus{background:var(--orange-dark);color:#fff;}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-outline{background:#fff;border-color:var(--line);color:var(--text);}
.btn-outline:hover,.btn-outline:focus{border-color:var(--orange);color:var(--orange-dark);}
.btn-sm{padding:10px 18px;font-size:14px;}

/* ============ 移动端导航 ============ */
.nav-toggle{
  display:none;position:fixed;top:11px;right:16px;z-index:95;
  width:40px;height:38px;border-radius:10px;background:rgba(255,255,255,.08);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:transform 180ms var(--ease),opacity 180ms var(--ease);}
.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-open .nav-toggle span:nth-child(2){opacity:0;}
.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-mask{position:fixed;inset:0;background:rgba(16,19,24,.55);z-index:65;}

/* ============ 面包屑 ============ */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.6);margin-bottom:22px;}
.crumb a{color:rgba(255,255,255,.72);}
.crumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.crumb .sep{color:rgba(255,255,255,.35);}
.crumb .current{color:#fff;font-weight:600;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:var(--ink) url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  padding:84px 0 78px;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(16,19,24,.94) 0%,rgba(16,19,24,.82) 50%,rgba(16,19,24,.64) 100%);
}
.hero .container{position:relative;z-index:2;}
.hero h1{
  color:#fff;font-size:clamp(34px,4.6vw,58px);font-weight:800;
  letter-spacing:-.02em;line-height:1.14;max-width:16em;margin-bottom:18px;
}
.hero-lead{max-width:660px;color:rgba(255,255,255,.74);font-size:16.5px;line-height:1.9;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;
  font-weight:700;color:var(--orange);margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--orange);display:block;}
.help-search{position:relative;max-width:520px;margin-top:30px;}
.help-search input{
  width:100%;height:54px;border-radius:var(--radius-input);
  border:1px solid rgba(255,255,255,.26);background:rgba(255,255,255,.09);
  color:#fff;padding:0 54px 0 18px;font-size:15px;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease);
}
.help-search input::placeholder{color:rgba(255,255,255,.55);}
.help-search input:focus{
  outline:none;border-color:var(--orange);background:rgba(255,255,255,.14);
  box-shadow:0 0 0 3px rgba(255,90,38,.26);
}
.help-search .search-icon{position:absolute;right:18px;top:50%;transform:translateY(-50%);color:var(--orange);display:flex;}
.search-hint{margin-top:12px;font-size:13px;color:rgba(255,255,255,.55);}
.quick-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);}
.quick-tags span{font-size:13px;color:rgba(255,255,255,.55);align-self:center;margin-right:2px;}
.tag{
  display:inline-flex;align-items:center;border-radius:999px;padding:7px 15px;
  font-size:13px;background:rgba(255,255,255,.1);color:rgba(255,255,255,.85);
  border:1px solid rgba(255,255,255,.16);
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.tag:hover{background:var(--orange);border-color:var(--orange);color:#fff;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:34px;margin-top:34px;padding-top:26px;
  border-top:1px solid rgba(255,255,255,.14);
}
.hero-stats div{line-height:1.5;}
.hero-stats b{display:block;color:#fff;font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.hero-stats span{font-size:12.5px;color:rgba(255,255,255,.55);letter-spacing:.03em;}

/* ============ 通用板块头 ============ */
.section-head{max-width:720px;margin-bottom:42px;}
.section-head h2{font-size:clamp(26px,3vw,38px);line-height:1.22;letter-spacing:-.01em;margin-bottom:14px;}
.section-head p{color:var(--muted);font-size:16px;}
.section-head.row-head{max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.text-link{color:var(--orange-dark);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px;}
.text-link:hover{text-decoration:underline;text-underline-offset:4px;}
.text-link .arrow{transition:transform 180ms var(--ease);}
.text-link:hover .arrow{transform:translateX(4px);}

/* ============ 问题分类矩阵 ============ */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.topic-card{
  position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px 24px 28px;box-shadow:var(--shadow-1);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease);
}
.topic-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--orange);
  transform:scaleX(0);transform-origin:left;transition:transform 240ms var(--ease);
}
.topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.topic-card:hover::before{transform:scaleX(1);}
.topic-icon{
  width:44px;height:44px;border-radius:12px;background:rgba(16,19,24,.06);
  color:var(--ink);display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.topic-card h3{font-size:17.5px;font-weight:700;margin-bottom:8px;line-height:1.4;}
.topic-card p{color:var(--muted);font-size:14.5px;line-height:1.75;}
.topic-count{
  display:inline-block;margin-top:14px;font-size:12px;letter-spacing:.06em;
  color:var(--orange-dark);background:rgba(255,90,38,.1);border-radius:999px;padding:4px 12px;
}

/* ============ 图文自查块 ============ */
.check-split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.check-media{border-radius:var(--radius-img);overflow:hidden;position:relative;background:#e9e4da;}
.check-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius-img);}
.check-media::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius-img);
  background:linear-gradient(180deg,rgba(16,19,24,0) 40%,rgba(16,19,24,.5) 100%);
}
.check-media figcaption{
  position:absolute;left:20px;bottom:16px;z-index:2;color:#fff;font-size:13px;letter-spacing:.02em;
}
.check-list{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);}
.check-list li{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line);}
.check-list .num{
  font-size:15px;font-weight:800;color:var(--orange);font-variant-numeric:tabular-nums;
  flex:0 0 32px;line-height:1.7;
}
.check-list h4{font-size:16.5px;font-weight:700;margin-bottom:6px;}
.check-list p{color:var(--muted);font-size:14.5px;}

/* ============ FAQ ============ */
.faq-tools{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;align-items:center;}
.chip{
  border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:999px;
  padding:9px 18px;font-size:14px;transition:border-color 180ms var(--ease),color 180ms var(--ease),background 180ms var(--ease);
}
.chip:hover{border-color:var(--orange);color:var(--orange-dark);}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff;}
.faq-count{margin-left:auto;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 4px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color 180ms var(--ease);
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{color:var(--orange-dark);}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--orange);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform 200ms var(--ease);
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
details[open] .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);}
details[open] .faq-q{color:var(--orange-dark);}
.faq-a{padding:0 4px 24px;max-width:860px;color:var(--muted);font-size:15.5px;line-height:1.9;}
.faq-a p+p{margin-top:10px;}
.faq-empty{
  border:1px dashed var(--line);border-radius:var(--radius-card);padding:34px 24px;text-align:center;
  color:var(--muted);font-size:15px;background:#fff;
}
.faq-empty .btn{margin-top:16px;}

/* ============ 深色排查顺序 ============ */
.dark-band{background:var(--ink);color:#fff;position:relative;overflow:hidden;}
.dark-band::before{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,38,.22),rgba(255,90,38,0) 68%);
}
.dark-band .container{position:relative;z-index:2;}
.dark-band h2{color:#fff;}
.dark-band .section-head p{color:rgba(255,255,255,.7);}
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.step{padding:26px 22px;border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-card);background:rgba(255,255,255,.03);}
.step .step-num{
  display:block;font-size:30px;font-weight:800;color:var(--orange);
  font-variant-numeric:tabular-nums;line-height:1;margin-bottom:14px;letter-spacing:-.02em;
}
.step h4{color:#fff;font-size:16.5px;margin-bottom:8px;}
.step p{color:rgba(255,255,255,.68);font-size:14.5px;line-height:1.8;}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--ink-2);color:#fff;border-radius:var(--radius-card);
  padding:38px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  border-left:4px solid var(--orange);box-shadow:var(--shadow-1);
}
.cta-band h3{color:#fff;font-size:clamp(20px,2.2vw,26px);margin-bottom:8px;line-height:1.3;}
.cta-band p{color:rgba(255,255,255,.7);font-size:15px;}

/* ============ 反馈渠道 ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.channel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-1);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease);
}
.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.channel .badge{
  display:inline-block;font-size:12px;letter-spacing:.08em;font-weight:700;
  color:var(--ink);background:rgba(16,19,24,.07);border-radius:999px;padding:4px 12px;margin-bottom:14px;
}
.channel h4{font-size:17px;margin-bottom:10px;}
.channel p{color:var(--muted);font-size:14.5px;line-height:1.8;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 30px;margin-top:0;}
.site-footer .brand{margin-bottom:16px;}
.footer-desc{color:rgba(255,255,255,.6);font-size:14.5px;max-width:320px;line-height:1.8;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:rgba(255,255,255,.66);font-size:14.5px;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.45);
}

/* ============ 进场动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .step-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  .side-nav-wrap{
    width:auto;height:60px;left:0;right:0;top:0;flex-direction:row;
    align-items:center;padding:0 16px;z-index:80;
  }
  .nav-brand{padding:0;}
  .brand-mark{width:32px;height:32px;font-size:16px;flex:0 0 32px;border-radius:9px;}
  .brand-text strong{font-size:14px;}
  .side-nav,.nav-foot{
    position:fixed;right:0;width:min(320px,86vw);background:var(--ink);
    transform:translateX(100%);transition:transform 260ms var(--ease);z-index:90;
  }
  .side-nav{top:0;bottom:104px;padding:86px 18px 16px;overflow-y:auto;gap:6px;}
  .nav-foot{bottom:0;height:104px;padding:18px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-direction:column;justify-content:center;}
  .nav-open .side-nav,.nav-open .nav-foot{transform:none;}
  .nav-toggle{display:flex;}
  .page{margin-left:0;padding-top:60px;}
  .section{padding:72px 0;}
  .section-tight{padding:56px 0;}
  .topic-grid{grid-template-columns:repeat(2,1fr);}
  .check-split{grid-template-columns:1fr;gap:32px;}
  .channel-grid{grid-template-columns:1fr 1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 26px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .hero{padding:56px 0 58px;}
  .hero-stats{gap:22px;}
  .topic-grid{grid-template-columns:1fr;}
  .step-grid{grid-template-columns:1fr;}
  .channel-grid{grid-template-columns:1fr;}
  .faq-q{font-size:15.5px;padding:18px 2px;gap:14px;}
  .faq-a{font-size:15px;}
  .faq-count{margin-left:0;width:100%;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .quick-tags span{width:100%;}
}
@media (max-width:520px){
  .hero h1{font-size:clamp(28px,8.4vw,36px);}
  .btn{width:100%;justify-content:center;}
  .cta-band .btn,.nav-foot .btn{width:100%;}
  .cta-band{padding:26px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}