/* roulang page: index */
:root{
  --ink:#171511;
  --accent:#FF4A1C;
  --accent-hover:#E23A0F;
  --lime:#C6F24E;
  --bg:#F6F2EA;
  --surface:#FFFFFF;
  --surface-2:#FBF8F2;
  --line:#E6DFD3;
  --text-2:#6E675D;
  --dark-2:#B9B2A6;
  --r-sm:10px;
  --r-md:18px;
  --r-lg:28px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(23,21,17,.04);
  --sh-2:0 18px 40px rgba(23,21,17,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --nav-h:72px;
  --bs-primary:#FF4A1C;
  --bs-primary-rgb:255,74,28;
  --bs-body-bg:#F6F2EA;
  --bs-body-color:#171511;
  --bs-border-color:#E6DFD3;
  --bs-link-color:#171511;
  --bs-link-hover-color:#E23A0F;
  --bs-border-radius:10px;
  --bs-border-radius-lg:18px;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color .25s var(--ease)}
a:hover{color:var(--accent-hover)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--ink);margin:0;letter-spacing:-.02em}
h1{font-size:clamp(2.5rem,6.5vw,5rem);line-height:1.05;font-weight:900;letter-spacing:-.03em}
h2{font-size:clamp(1.75rem,3.4vw,2.75rem);line-height:1.15;font-weight:900}
h3{font-size:1.3rem;font-weight:700;line-height:1.4}
p{margin:0 0 1.1em}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:1320px;margin:0 auto;padding:0 20px}
@media (min-width:992px){.wrap{padding:0 32px}}
@media (min-width:1400px){.wrap{max-width:1440px}}
.section{padding:64px 0}
@media (min-width:992px){.section{padding:106px 0}}
.section--tight{padding:56px 0}
@media (min-width:992px){.section--tight{padding:76px 0}}
.section--dark{background:var(--ink);color:#F6F2EA}
.section--dark h2,.section--dark h3{color:#FFFFFF}
.section--alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;font-weight:700;
  padding:7px 14px;border-radius:var(--r-pill);
  background:var(--lime);color:var(--ink);
}
.eyebrow--dark{background:var(--ink);color:#fff}
.sec-head{max-width:780px;margin-bottom:40px}
.sec-head p{color:var(--text-2);font-size:17px;margin:14px 0 0}
.section--dark .sec-head p{color:var(--dark-2)}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15.5px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
  white-space:nowrap;line-height:1;
}
.btn svg{flex:none}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,74,28,.22)}
.btn-accent:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px rgba(255,74,28,.28)}
.btn-accent:active{transform:translateY(0);background:var(--accent-hover)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-light{background:#fff;color:var(--ink);border-color:transparent}
.btn-light:hover{background:#fff;color:var(--ink);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn-outline-light:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-2px)}
.btn-lg{height:54px;padding:0 28px;font-size:16.5px}
.btn-link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--accent)}
.btn-link-arrow svg{transition:transform .25s var(--ease)}
.btn-link-arrow:hover{color:var(--accent-hover)}
.btn-link-arrow:hover svg{transform:translateX(4px)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,242,234,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-stuck{box-shadow:0 10px 30px rgba(23,21,17,.07)}
.header-inner{display:flex;align-items:center;gap:20px;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:12px;background:var(--ink)}
.brand-mark svg{width:20px;height:20px}
.brand-text{font-size:17.5px;font-weight:900;letter-spacing:-.01em;white-space:nowrap}
.brand-short{display:none;font-size:17.5px;font-weight:900}
.main-nav{display:none;align-items:center;gap:4px;margin-left:8px}
.main-nav .nav-link{
  position:relative;padding:10px 14px;font-size:15.5px;font-weight:600;color:var(--ink);
  border-radius:8px;white-space:nowrap;
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.main-nav .nav-link:hover{color:var(--accent-hover)}
.main-nav .nav-link:hover::after{transform:scaleX(1)}
.main-nav .nav-link.is-active{font-weight:800}
.main-nav .nav-link.is-active::after{transform:scaleX(1)}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:none;align-items:center;gap:8px;height:42px;padding:0 16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);width:220px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);}
.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14)}
.search-box svg{color:var(--text-2);flex:none}
.search-box input{border:0;outline:0;background:transparent;font-size:14.5px;width:100%;color:var(--ink)}
.search-box input::placeholder{color:#A9A296}
.btn-text{display:none;font-weight:700;font-size:15.5px;padding:8px 10px;border-radius:8px}
.btn-text:hover{color:var(--accent-hover)}
.header-cta{display:none}
.menu-toggle{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;cursor:pointer;transition:border-color .25s var(--ease)}
.menu-toggle:hover{border-color:var(--ink)}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:2.5px 0;border-radius:2px}
@media (min-width:768px){
  .header-cta{display:inline-flex}
}
@media (min-width:1200px){
  .main-nav{display:flex}
  .search-box{display:flex}
  .btn-text{display:inline-flex}
  .menu-toggle{display:none}
}
@media (max-width:1199px){
  .brand-text{display:none}
  .brand-short{display:inline}
}
@media (max-width:767px){
  :root{--nav-h:64px}
  .brand-mark{width:30px;height:30px}
  .brand-short,.brand-text{font-size:16px}
}
.offcanvas{background:var(--bg);max-width:88vw}
.offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.offcanvas-title{font-weight:900;font-size:17px}
.offcanvas-body{padding:20px}
.drawer-nav{display:grid;gap:6px;margin:18px 0 22px}
.drawer-nav a{padding:14px 14px;border-radius:12px;font-weight:700;font-size:16px;background:#fff;border:1px solid var(--line)}
.drawer-nav a:hover{background:var(--surface-2);color:var(--accent-hover)}
.drawer-nav a.is-active{border-color:var(--accent);color:var(--accent)}

/* ---------- anchor subnav ---------- */
.subnav{position:sticky;top:var(--nav-h);z-index:1020;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.subnav-inner{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;padding:8px 0}
.subnav-inner::-webkit-scrollbar{display:none}
.subnav a{padding:10px 16px;font-size:14.5px;font-weight:700;color:var(--text-2);
  border-radius:var(--r-pill);white-space:nowrap;position:relative;transition:color .25s var(--ease),background .25s var(--ease)}
.subnav a:hover{color:var(--ink);background:var(--surface-2)}
.subnav a.is-current{color:var(--accent);background:rgba(255,74,28,.08)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:auto;padding:60px 0 64px;overflow:hidden;
  background-image:linear-gradient(105deg,rgba(23,21,17,.94) 0%,rgba(23,21,17,.78) 42%,rgba(23,21,17,.34) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;}
@media (min-width:992px){.hero{min-height:88vh;display:flex;align-items:center;padding:110px 0}}
.hero-grid{display:grid;gap:36px;align-items:center}
@media (min-width:992px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px}}
.hero h1{color:#fff;margin:20px 0 18px}
.hero-sub{color:#DED8CD;font-size:18px;max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-trust{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 20px;max-width:620px}
.hero-trust div{display:flex;align-items:flex-start;gap:9px;font-size:14.5px;color:#DED8CD}
.hero-trust svg{flex:none;margin-top:3px;color:var(--lime)}
.hero-shot{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--r-lg);
  padding:14px;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.hero-shot:hover{transform:translateY(-6px);box-shadow:0 30px 60px rgba(0,0,0,.35)}
.hero-shot .ratio{position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;border-radius:20px;background:#0d0c0a}
.hero-shot img{width:100%;height:100%;object-fit:cover}
.hero-shot figcaption{color:#B9B2A6;font-size:13.5px;padding:12px 6px 4px;margin:0}
@media (max-width:991px){
  .hero h1{font-size:2.25rem}
  .hero-trust{grid-template-columns:1fr}
}

/* ---------- highlights ---------- */
.hl-row{display:grid;gap:28px;align-items:center;padding:34px 0;border-top:1px solid var(--line)}
.hl-row:last-child{border-bottom:1px solid var(--line)}
@media (min-width:992px){
  .hl-row{grid-template-columns:5fr 7fr;gap:56px;padding:48px 0}
  .hl-row.rev{grid-template-columns:7fr 5fr}
  .hl-row.rev .hl-copy{order:2}
  .hl-row.rev .hl-media{order:1}
}
.hl-num{font-family:Inter,system-ui,sans-serif;font-size:clamp(3rem,7vw,5rem);font-weight:900;line-height:1;
  color:transparent;-webkit-text-stroke:2px var(--lime);letter-spacing:-.04em;display:block;margin-bottom:10px}
.hl-copy h3{margin-bottom:12px}
.hl-copy p{color:var(--text-2);margin:0}
.hl-media .ratio{position:relative;width:100%;aspect-ratio:3/2;overflow:hidden;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--surface)}
.hl-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.hl-media:hover img{transform:scale(1.03)}

/* ---------- demo ---------- */
.tab-strip{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.tab-strip span{font-size:13.5px;font-weight:700;padding:9px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;color:var(--text-2)}
.tab-strip span.on{background:var(--ink);border-color:var(--ink);color:#fff}
.demo-grid{display:grid;gap:32px}
@media (min-width:992px){.demo-grid{grid-template-columns:7fr 5fr;gap:48px;align-items:start}}
.demo-figure{margin:0}
.demo-figure .ratio{position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line)}
.demo-figure img{width:100%;height:100%;object-fit:cover}
.demo-figure figcaption{font-size:14px;color:var(--text-2);margin-top:12px}
.demo-list{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.demo-list li{display:grid;grid-template-columns:44px 1fr;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}
.demo-list li:first-child{border-top:1px solid var(--line)}
.demo-list .idx{font-family:Inter,system-ui,sans-serif;font-weight:900;font-size:19px;color:var(--accent)}
.demo-list h4{font-size:17px;font-weight:800;margin-bottom:4px}
.demo-list p{font-size:14.5px;color:var(--text-2);margin:0}

/* ---------- login guide band ---------- */
.login-band{display:grid;gap:24px}
@media (min-width:992px){.login-band{grid-template-columns:1fr 1fr 1fr}}
.login-step{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:26px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.login-step:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.login-step .badge-step{display:inline-block;font-size:12px;letter-spacing:.08em;font-weight:700;
  background:var(--ink);color:#fff;padding:5px 12px;border-radius:var(--r-pill);margin-bottom:14px}
.login-step h3{font-size:18px;margin-bottom:8px}
.login-step p{font-size:15px;color:var(--text-2);margin:0}

/* ---------- proof ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:52px}
@media (min-width:992px){.stat-grid{grid-template-columns:repeat(4,1fr);gap:32px}}
.stat{padding-left:18px;border-left:3px solid var(--lime)}
.stat b{display:block;font-family:Inter,system-ui,sans-serif;font-size:clamp(2.2rem,4.6vw,3.2rem);font-weight:900;
  line-height:1.05;color:var(--accent);letter-spacing:-.03em}
.stat span{display:block;font-size:14px;color:var(--dark-2);margin-top:8px}
.quote-track{display:flex;gap:20px;overflow-x:auto;padding:6px 2px 12px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.quote-track::-webkit-scrollbar{display:none}
.quote-card{flex:0 0 300px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-md);padding:22px}
@media (min-width:768px){.quote-card{flex:0 0 340px}}
.quote-card p{font-size:15px;color:#EDE7DC;margin:0 0 16px}
.quote-foot{display:flex;align-items:center;gap:12px}
.avatar{width:40px;height:40px;border-radius:50%;background:rgba(198,242,78,.16);border:1px solid rgba(198,242,78,.5);
  display:grid;place-items:center;font-weight:900;font-size:14px;color:var(--lime);flex:none}
.quote-foot strong{display:block;font-size:14.5px;color:#fff;font-weight:700}
.quote-foot em{font-style:normal;font-size:12.5px;color:var(--dark-2)}

/* ---------- news ---------- */
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;flex-wrap:wrap}
.news-grid{display:grid;gap:24px}
@media (min-width:992px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.news-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.news-thumb{display:block;position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.news-item:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.badge-cat{align-self:flex-start;font-size:12px;letter-spacing:.08em;font-weight:700;
  background:var(--lime);color:var(--ink);padding:5px 12px;border-radius:var(--r-pill)}
.news-body h3{font-size:18px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body h3 a:hover{color:var(--accent-hover)}
.news-body p{font-size:14.5px;color:var(--text-2);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13.5px;color:var(--text-2);padding-top:12px;border-top:1px solid var(--line)}
.news-meta .more{font-weight:700;color:var(--accent)}
@media (min-width:992px){
  .news-item.is-lead{grid-column:1 / -1;flex-direction:row;align-items:stretch}
  .news-item.is-lead .news-thumb{width:52%;aspect-ratio:auto;min-height:320px}
  .news-item.is-lead .news-body{padding:36px;justify-content:center}
  .news-item.is-lead .news-body h3{font-size:clamp(1.4rem,2.2vw,1.95rem);-webkit-line-clamp:3}
  .news-item.is-lead .news-body p{font-size:16px;-webkit-line-clamp:3}
}
.news-empty{grid-column:1 / -1;text-align:center;background:var(--surface);border:1px dashed var(--line);
  border-radius:var(--r-lg);padding:56px 24px}
.news-empty .ph{width:88px;height:88px;margin:0 auto 18px;border-radius:24px;background:var(--surface-2);
  border:1px solid var(--line);display:grid;place-items:center}
.news-empty h3{font-size:19px;margin-bottom:8px}
.news-empty p{color:var(--text-2);margin-bottom:20px;font-size:15px}

/* ---------- plans ---------- */
.plan-grid{display:grid;gap:24px;align-items:stretch}
@media (min-width:992px){.plan-grid{grid-template-columns:1fr 1.06fr 1fr;gap:28px}}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 28px;
  display:flex;flex-direction:column;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.plan.is-main{border:2px solid var(--accent);position:relative;box-shadow:0 20px 50px rgba(23,21,17,.08)}
.plan.is-main::before{content:"推荐";position:absolute;top:-13px;left:28px;background:var(--accent);color:#fff;
  font-size:12px;letter-spacing:.08em;font-weight:700;padding:5px 14px;border-radius:var(--r-pill)}
.plan h3{font-size:20px;margin-bottom:8px}
.plan .plan-desc{font-size:14.5px;color:var(--text-2);margin-bottom:22px}
.plan ul{list-style:none;margin:0 0 26px;padding:0;display:grid;gap:12px}
.plan ul li{display:flex;gap:10px;font-size:15px;align-items:flex-start}
.plan ul li svg{flex:none;margin-top:4px;color:var(--accent)}
.plan .btn{margin-top:auto;width:100%}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto}
.accordion-item{background:var(--surface);border:1px solid var(--line)!important;border-radius:var(--r-md)!important;
  margin-bottom:14px;overflow:hidden}
.accordion-button{
  background:var(--surface);color:var(--ink);font-weight:700;font-size:17px;
  padding:20px 22px;border-radius:var(--r-md)!important;box-shadow:none!important;
}
.accordion-button:hover{background:var(--surface-2)}
.accordion-button:not(.collapsed){background:var(--surface-2);color:var(--ink);box-shadow:inset 3px 0 0 var(--accent)!important}
.accordion-button::after{
  background-image:none!important;content:"";width:11px;height:11px;
  border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);
  transform:rotate(45deg);transition:transform .25s var(--ease);margin-left:auto;
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg)}
.accordion-button:focus{box-shadow:none!important;border-color:var(--line)}
.accordion-body{font-size:16px;color:var(--text-2);padding:4px 22px 22px;line-height:1.8}

/* ---------- cta band ---------- */
.cta-band{background:var(--surface-2);padding:64px 0}
@media (min-width:992px){.cta-band{padding:96px 0}}
.cta-inner{background:var(--ink);border-radius:var(--r-lg);padding:40px 28px;color:#fff;
  display:grid;gap:26px;align-items:center}
@media (min-width:992px){.cta-inner{grid-template-columns:1.5fr 1fr;padding:56px 56px}}
.cta-inner h2{color:#fff;margin-bottom:12px}
.cta-inner p{color:var(--dark-2);margin:0;font-size:16px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
@media (min-width:992px){.cta-actions{justify-content:flex-end}}
.cta-note{grid-column:1 / -1;font-size:13.5px;color:#8F887C;border-top:1px solid rgba(255,255,255,.12);padding-top:18px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--dark-2);padding:64px 0 28px;font-size:15px}
.footer-grid{display:grid;gap:34px}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:992px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.site-footer h4{font-size:14px;letter-spacing:.06em;color:#fff;margin-bottom:16px;font-weight:700}
.site-footer p{color:var(--dark-2);font-size:14.5px;margin:0 0 14px}
.site-footer a{color:var(--dark-2);display:block;padding:5px 0;font-size:15px}
.site-footer a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand span{color:#fff;font-weight:900;font-size:17px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:20px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13.5px;color:#8F887C}
.footer-bottom a{display:inline;padding:0;font-size:13.5px;text-decoration:underline;text-underline-offset:3px}

/* ---------- floating cta ---------- */
.float-cta{position:fixed;right:28px;bottom:28px;z-index:1040;
  display:inline-flex;align-items:center;gap:10px;height:54px;padding:0 26px;border-radius:var(--r-pill);
  background:var(--accent);color:#fff;font-weight:700;font-size:15.5px;
  box-shadow:0 16px 34px rgba(255,74,28,.32);
  opacity:0;transform:translateY(16px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .25s var(--ease)}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--accent-hover);color:#fff}
@media (max-width:767px){
  .float-cta{right:0;left:0;bottom:0;border-radius:0;height:56px;justify-content:center;
    padding:0 18px calc(0px + env(safe-area-inset-bottom));transform:translateY(100%)}
  .float-cta.show{transform:translateY(0)}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .5s var(--ease),transform .5s var(--ease)}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink:#171511;
  --accent:#FF4A1C;
  --accent-hover:#E23A0F;
  --lime:#C6F24E;
  --bg:#F6F2EA;
  --surface:#FFFFFF;
  --surface-2:#FBF8F2;
  --line:#E6DFD3;
  --text-2:#6E675D;
  --ink-2:#B9B2A6;
  --r-btn:10px;
  --r-card:18px;
  --r-hero:28px;
  --shadow-1:0 1px 2px rgba(23,21,17,.04);
  --shadow-2:0 18px 40px rgba(23,21,17,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --dur:.25s;
  --maxw:1320px;
  --bs-primary:#FF4A1C;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --bs-border-radius:10px;
  --bs-link-color:#E23A0F;
  --bs-link-hover-color:#171511;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.15;letter-spacing:-.02em;font-weight:900}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:768px){.wrap{padding:0 32px}}
@media (min-width:1400px){.wrap{max-width:1440px}}

/* ---------- 按钮 ---------- */
.btn-rl{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-weight:700;font-size:15px;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn-rl:active{transform:translateY(0) scale(.99)}
.btn-primary-rl{background:var(--accent);color:#fff;box-shadow:0 2px 0 rgba(23,21,17,.06)}
.btn-primary-rl:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 14px 28px rgba(255,74,28,.28);color:#fff}
.btn-ghost-rl{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost-rl:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-lg-rl{height:54px;padding:0 28px;font-size:16px}
.btn-text-rl{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--accent);transition:gap var(--dur) var(--ease),color var(--dur) var(--ease)}
.btn-text-rl:hover{gap:14px;color:var(--accent-hover)}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,242,234,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--dur) var(--ease);
}
.site-header.is-stuck{box-shadow:0 10px 30px rgba(23,21,17,.08)}
.header-inner{
  display:flex;align-items:center;gap:20px;
  height:72px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:grid;place-items:center;
  background:var(--ink);
  border:1px solid rgba(198,242,78,.35);
  flex-shrink:0;
}
.brand-name{font-weight:900;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.brand-name-short{display:none;font-weight:900;font-size:17px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px}
.nav-link{
  position:relative;
  padding:0 18px;height:72px;display:inline-flex;align-items:center;
  font-size:15.5px;color:var(--ink);font-weight:500;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:18px;right:18px;bottom:20px;height:2px;
  background:var(--accent);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--accent)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{font-weight:800}
.nav-link.is-active::after{transform:scaleX(1)}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-search{position:relative}
.nav-search input{
  width:220px;height:42px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);
  padding:0 16px 0 40px;font-size:14px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-search input::placeholder{color:#A49C8F}
.nav-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14)}
.nav-search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);opacity:.55;pointer-events:none}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--ink)}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,21,17,.5);
  opacity:0;visibility:hidden;transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease);z-index:1040;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,88vw);
  background:var(--bg);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform var(--dur) var(--ease);
  z-index:1050;padding:20px;overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);cursor:pointer;display:grid;place-items:center;
}
.drawer-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.drawer-list a{
  height:52px;display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid var(--line);font-weight:600;
  transition:color var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.drawer-list a:hover{color:var(--accent);padding-left:6px}
.drawer-actions{display:flex;flex-direction:column;gap:10px}
.drawer-search input{width:100%;height:46px;border-radius:999px;border:1px solid var(--line);background:var(--surface);padding:0 18px}
.drawer-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14)}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:22px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2)}
.crumb a{transition:color var(--dur) var(--ease)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.5}
.crumb .current{color:var(--ink);font-weight:600}

/* ---------- Hero ---------- */
.hero-guide{
  position:relative;overflow:hidden;
  margin-top:22px;
  border-radius:var(--r-hero);
  background:
    linear-gradient(105deg,rgba(23,21,17,.94) 0%,rgba(23,21,17,.72) 48%,rgba(23,21,17,.34) 100%),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  color:#fff;
}
.hero-guide::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:72px 72px;
  opacity:.5;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;
  padding:72px 0;
}
.hero-copy{max-width:640px}
.badge-lime{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;
  background:var(--lime);color:var(--ink);
  font-size:12px;font-weight:800;letter-spacing:.08em;
  text-transform:none;
}
.hero-guide h1{
  margin-top:20px;
  font-size:clamp(2rem,4.4vw,3.4rem);
  line-height:1.14;letter-spacing:-.03em;
}
.hero-guide h1 em{font-style:normal;color:var(--lime)}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:#DED7CB;max-width:560px}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.hero-actions .btn-ghost-rl{color:#fff;border-color:rgba(255,255,255,.45)}
.hero-actions .btn-ghost-rl:hover{background:#fff;color:var(--ink);border-color:#fff}
.hero-stats{
  margin-top:36px;padding-top:26px;border-top:1px solid rgba(255,255,255,.16);
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;
}
.hero-stats .num{font-size:26px;font-weight:900;color:var(--accent);letter-spacing:-.02em;line-height:1.1}
.hero-stats .lab{margin-top:6px;font-size:13.5px;color:var(--ink-2);line-height:1.6}
.hero-figure{
  border-radius:var(--r-hero);overflow:hidden;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(23,21,17,.4);
  box-shadow:0 24px 60px rgba(0,0,0,.35);
  transition:transform var(--dur) var(--ease);
}
.hero-figure:hover{transform:translateY(-6px)}
.hero-figure .ratio-box{position:relative;aspect-ratio:3/2;background:var(--ink)}
.hero-figure img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-figure figcaption{
  padding:14px 18px;font-size:13.5px;color:#DED7CB;
  background:rgba(23,21,17,.86);border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;gap:10px;
}
.dot-lime{width:8px;height:8px;border-radius:50%;background:var(--lime);flex-shrink:0}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--text-2);
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent);border-radius:2px}
.section-head h2{margin-top:14px;font-size:clamp(1.75rem,3.4vw,2.6rem)}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16.5px}

/* ---------- 时间线 ---------- */
.timeline-wrap{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:48px;align-items:start}
.timeline{position:relative;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:23px;top:12px;bottom:12px;width:1px;background:var(--line);
}
.step{
  position:relative;padding:0 0 34px 72px;
}
.step:last-child{padding-bottom:0}
.step-no{
  position:absolute;left:0;top:0;
  width:47px;height:47px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--surface);border:1px solid var(--line);
  font-weight:900;font-size:16px;color:var(--ink);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.step:hover .step-no{background:var(--ink);color:var(--lime);border-color:var(--ink);transform:translateY(-3px)}
.step-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 26px;box-shadow:var(--shadow-1);
  transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.step:hover .step-body{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCD3C4}
.step-body h3{font-size:19px;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.step-body .tag{
  font-size:11.5px;font-weight:800;letter-spacing:.08em;
  padding:4px 10px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);color:var(--text-2);
}
.step-body p{margin-top:10px;color:var(--text-2);font-size:15.5px;line-height:1.85}
.step-note{
  margin-top:14px;padding:12px 16px;border-left:3px solid var(--lime);
  background:var(--surface-2);border-radius:0 12px 12px 0;
  font-size:14.5px;color:var(--text-2);
}
.step-shot{
  margin-top:18px;border-radius:14px;overflow:hidden;border:1px solid var(--line);
  position:relative;aspect-ratio:16/9;background:var(--bg);
}
.step-shot img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform var(--dur) var(--ease)}
.step:hover .step-shot img{transform:scale(1.03)}

/* ---------- 侧栏提示卡 ---------- */
.side-stack{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow-1);
}
.panel h3{font-size:17px}
.panel p{margin-top:10px;font-size:14.5px;color:var(--text-2)}
.check-list{margin-top:16px;display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.check-list svg{flex-shrink:0;margin-top:4px}
.panel-dark{
  background:var(--ink);border-color:var(--ink);color:#fff;
  border-radius:var(--r-card);padding:28px;
}
.panel-dark h3{color:#fff;font-size:18px}
.panel-dark p{margin-top:10px;color:var(--ink-2);font-size:14.5px}
.panel-dark .btn-rl{margin-top:20px;width:100%}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:16px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);overflow:hidden;
  transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#DCD3C4}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:22px 60px 22px 24px;
  font-weight:700;font-size:16.5px;line-height:1.6;
  display:flex;align-items:flex-start;gap:12px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--accent);transform:scaleY(0);transform-origin:top;
  transition:transform var(--dur) var(--ease);
}
.faq-item[open] summary::before{transform:scaleY(1)}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;
  width:12px;height:12px;margin-top:-8px;
  border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);
  transform:rotate(45deg);transition:transform var(--dur) var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:-2px}
.faq-item .answer{padding:0 24px 24px;color:var(--text-2);font-size:15.8px;line-height:1.85}
.faq-item .answer p+p{margin-top:12px}

/* ---------- CTA 带 ---------- */
.cta-band{padding:0 0 96px}
.cta-inner{
  position:relative;overflow:hidden;
  background:var(--ink);color:#fff;
  border-radius:var(--r-hero);
  padding:56px 56px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center;
}
.cta-inner::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,74,28,.35),transparent 65%);
}
.cta-inner h2{font-size:clamp(1.6rem,3vw,2.3rem);position:relative;z-index:2}
.cta-inner p{margin-top:14px;color:var(--ink-2);font-size:15.5px;max-width:520px;position:relative;z-index:2}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-inner .btn-ghost-rl{color:#fff;border-color:rgba(255,255,255,.4)}
.cta-inner .btn-ghost-rl:hover{background:#fff;color:var(--ink);border-color:#fff}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:17px}
.site-footer p{margin-top:16px;color:var(--ink-2);font-size:14.8px;line-height:1.85;max-width:340px}
.site-footer h4{font-size:14px;letter-spacing:.06em;color:#fff;font-weight:800;margin-bottom:18px}
.site-footer h4+.footer-links{display:flex;flex-direction:column;gap:12px}
.site-footer .footer-col a{display:block;font-size:15px;color:var(--ink-2);margin-bottom:12px;transition:color var(--dur) var(--ease),padding-left var(--dur) var(--ease)}
.site-footer .footer-col a:hover{color:#fff;padding-left:4px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:var(--ink-2);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:26px;bottom:26px;z-index:1035;
  display:inline-flex;align-items:center;gap:10px;
  height:54px;padding:0 24px;border-radius:999px;
  background:var(--accent);color:#fff;font-weight:800;font-size:15px;
  box-shadow:0 16px 36px rgba(255,74,28,.32);
  opacity:0;transform:translateY(18px);visibility:hidden;
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease),background var(--dur) var(--ease);
}
.float-cta.is-show{opacity:1;transform:translateY(0);visibility:visible}
.float-cta:hover{background:var(--accent-hover);color:#fff;transform:translateY(-3px)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-search input{width:170px}
  .brand-name{font-size:16px}
  .nav-link{padding:0 14px;font-size:15px}
  .nav-link::after{left:14px;right:14px}
  .timeline-wrap{grid-template-columns:minmax(0,1fr) 300px;gap:32px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:flex}
  .header-tools .btn-ghost-rl{display:none}
  .hero-grid{grid-template-columns:1fr;gap:36px;padding:56px 0}
  .hero-copy{max-width:none}
  .hero-figure{max-width:560px}
  .timeline-wrap{grid-template-columns:1fr}
  .side-stack{position:static}
  .cta-inner{grid-template-columns:1fr;padding:44px 32px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .brand-name{display:none}
  .brand-name-short{display:inline}
  .header-inner{height:64px}
  .nav-link{height:64px}
  .section{padding:60px 0}
  .section-tight{padding:52px 0}
  .hero-guide h1{font-size:2rem}
  .hero-stats{grid-template-columns:1fr;gap:14px}
  .step{padding-left:60px}
  .step-no{width:40px;height:40px;font-size:15px}
  .timeline::before{left:20px}
  .step-body{padding:20px}
  .faq-item summary{padding:18px 52px 18px 20px;font-size:15.5px}
  .faq-item .answer{padding:0 20px 20px}
  .cta-band{padding-bottom:70px}
  .cta-inner{padding:34px 22px;border-radius:20px}
  .footer-bottom{flex-direction:column}
  .float-cta{
    left:0;right:0;bottom:0;height:56px;border-radius:0;
    justify-content:center;padding:0 20px;
    padding-bottom:env(safe-area-inset-bottom);
    transform:translateY(100%);
  }
  .float-cta.is-show{transform:translateY(0)}
}
@media (max-width:520px){
  .hero-actions .btn-rl{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn-rl{width:100%}
  .footer-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink:#171511;
  --accent:#FF4A1C;
  --accent-hover:#E23A0F;
  --lime:#C6F24E;
  --bg:#F6F2EA;
  --surface:#FFFFFF;
  --surface-2:#FBF8F2;
  --line:#E6DFD3;
  --text-2:#6E675D;
  --dark-2:#B9B2A6;
  --r-sm:10px;
  --r-md:18px;
  --r-lg:28px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(23,21,17,.04);
  --sh-2:0 18px 40px rgba(23,21,17,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --t:.25s cubic-bezier(.22,1,.36,1);
  --bs-primary:#FF4A1C;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --bs-border-radius:10px;
  --bs-link-color:#FF4A1C;
  --bs-link-hover-color:#E23A0F;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--accent);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--accent-hover);}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.02em;line-height:1.15;}
p{margin:0;}
.wrap{width:100%;max-width:1320px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.wrap{padding:0 32px;}}
@media (min-width:1400px){.wrap{max-width:1440px;}}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,242,234,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(23,21,17,.08);}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:900;font-size:19px;letter-spacing:-.01em;flex:0 0 auto;}
.brand:hover{color:var(--ink);}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid var(--line);border-radius:10px;background:var(--surface);}
.brand-text{white-space:nowrap;}
.main-nav{display:none;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  display:inline-block;padding:8px 18px;border-radius:8px;
  color:var(--ink);font-size:15px;font-weight:600;position:relative;
}
.nav-link::after{
  content:"";position:absolute;left:18px;right:18px;bottom:2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-link:hover{color:var(--accent);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{font-weight:800;color:var(--ink);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{display:none;align-items:center;gap:8px;width:220px;height:40px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface);transition:border-color var(--t),box-shadow var(--t);}
.nav-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14);}
.nav-search input{border:0;background:transparent;outline:none;font-size:14px;width:100%;color:var(--ink);}
.nav-search svg{flex:0 0 auto;color:var(--text-2);}
.btn-text{display:none;padding:8px 10px;color:var(--ink);font-weight:700;font-size:15px;border-radius:8px;}
.btn-text:hover{color:var(--accent);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:700;transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,74,28,.22);}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,74,28,.28);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.header-cta{display:none;}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;
  border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);
}
.nav-toggle:hover{border-color:var(--ink);}
@media (min-width:768px){
  .btn-text{display:inline-block;}
  .header-cta{display:inline-flex;}
}
@media (min-width:992px){
  .main-nav{display:flex;}
  .nav-search{display:flex;}
  .nav-toggle{display:none;}
}
@media (min-width:1200px){
  .brand-text{font-size:20px;}
}
@media (max-width:575px){
  .header-inner{height:64px;}
  .brand-text{font-size:16px;}
}

/* ============ drawer ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(23,21,17,.5);opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);z-index:1040;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);background:var(--surface);z-index:1050;
  transform:translateX(102%);transition:transform .3s var(--ease);
  padding:22px 22px calc(22px + env(safe-area-inset-bottom));overflow-y:auto;
  border-left:1px solid var(--line);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-title{font-weight:900;font-size:17px;}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--ink);display:inline-flex;align-items:center;justify-content:center;}
.drawer-close:hover{border-color:var(--ink);}
.drawer .nav-search{display:flex;width:100%;margin-bottom:16px;}
.drawer-links{display:flex;flex-direction:column;margin:12px 0 18px;}
.drawer-links a{padding:13px 4px;border-bottom:1px solid var(--line);color:var(--ink);font-weight:700;font-size:16px;}
.drawer-links a:hover{color:var(--accent);}
.drawer-actions{display:flex;flex-direction:column;gap:12px;}

/* ============ breadcrumb ============ */
.crumb-bar{padding:22px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2);}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:#C9C1B4;}
.crumb .now{max-width:min(420px,60vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink);font-weight:600;}

/* ============ article head ============ */
.article-head{padding:26px 0 34px;border-bottom:1px solid var(--line);}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--r-pill);
  font-size:12px;font-weight:800;letter-spacing:.08em;
}
.badge-lime{background:var(--lime);color:var(--ink);}
.badge-ink{background:var(--ink);color:#fff;}
.badge-line{border:1px solid var(--line);color:var(--text-2);background:var(--surface);}
.article-head h1{
  font-size:clamp(2rem,4.4vw,3.25rem);font-weight:900;letter-spacing:-.03em;line-height:1.12;
  margin:18px 0 16px;max-width:20ch;
}
.lede{font-size:18px;line-height:1.8;color:var(--text-2);max-width:76ch;}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;margin-top:24px;}
.meta-item{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);}
.meta-item svg{color:var(--accent);}
.avatar{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--surface-2);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:900;color:var(--ink);}
.share-group{margin-left:auto;display:flex;align-items:center;gap:10px;}
.share-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink);transition:all var(--t);
}
.share-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}

/* ============ layout ============ */
.article-main{padding:44px 0 72px;}
.layout{display:grid;grid-template-columns:1fr;gap:36px;}
@media (min-width:992px){
  .layout{grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;}
}

/* ============ article body ============ */
.article-body{max-width:74ch;font-size:18px;line-height:1.85;color:var(--ink);}
.article-body p{margin:1.4em 0;}
.article-body h2{
  position:relative;font-size:clamp(1.5rem,2.4vw,1.95rem);font-weight:900;letter-spacing:-.02em;
  margin:2.2em 0 .8em;padding-left:18px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--lime);}
.article-body h3{font-size:1.28rem;font-weight:700;margin:1.8em 0 .6em;}
.article-body ul,.article-body ol{margin:1.2em 0;padding-left:1.2em;}
.article-body ul{list-style:none;padding-left:1.2em;}
.article-body ul>li{position:relative;margin:.5em 0;}
.article-body ul>li::before{content:"";position:absolute;left:-1.1em;top:.72em;width:7px;height:7px;background:var(--accent);border-radius:2px;}
.article-body ol>li{margin:.5em 0;}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;background:var(--surface-2);border-left:3px solid var(--accent);
  border-radius:0 var(--r-md) var(--r-md) 0;color:var(--ink);
}
.article-body blockquote p{margin:.4em 0;}
.article-body img{border-radius:var(--r-md);margin:1.6em auto;box-shadow:var(--sh-1);}
.article-body figure{margin:1.8em 0;}
.article-body figcaption{font-size:14px;color:var(--text-2);text-align:center;margin-top:10px;}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--accent-hover);}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;display:block;overflow-x:auto;}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;}
.article-body th{background:var(--bg);font-weight:700;}
.article-body pre{background:var(--ink);color:#F3EFE7;padding:18px;border-radius:14px;overflow-x:auto;font-size:14px;line-height:1.7;}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.empty-state{
  padding:48px 28px;border:1px dashed var(--line);border-radius:var(--r-md);background:var(--surface);
  text-align:center;
}
.empty-state h2{font-size:1.4rem;margin-bottom:10px;}
.empty-state p{color:var(--text-2);margin-bottom:20px;}

/* ============ sidebar ============ */
.sidebar{display:flex;flex-direction:column;gap:22px;}
@media (min-width:992px){
  .sidebar{position:sticky;top:96px;align-self:start;}
}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;box-shadow:var(--sh-1);}
.side-title{font-size:14px;font-weight:800;letter-spacing:.06em;color:var(--text-2);margin-bottom:14px;}
.toc-list{list-style:none;margin:0;padding:0;border-left:2px solid var(--line);}
.toc-list li{margin:0;}
.toc-list a{
  display:block;padding:7px 0 7px 14px;margin-left:-2px;border-left:2px solid transparent;
  color:var(--text-2);font-size:14px;line-height:1.6;transition:all var(--t);
}
.toc-list a:hover{color:var(--accent);}
.toc-list a.is-current{color:var(--accent);font-weight:700;border-left-color:var(--accent);}
.side-post{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);}
.side-post:last-child{border-bottom:0;}
.side-post .thumb{flex:0 0 72px;width:72px;height:54px;border-radius:10px;overflow:hidden;background:var(--surface-2);}
.side-post .thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.side-post:hover .thumb img{transform:scale(1.04);}
.side-post .st{font-size:14px;font-weight:700;color:var(--ink);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.side-post:hover .st{color:var(--accent);}
.side-post .sd{font-size:12px;color:var(--text-2);margin-top:4px;}
.side-cta{background:var(--ink);border:1px solid var(--ink);color:#fff;border-radius:var(--r-md);padding:24px;}
.side-cta h3{font-size:19px;color:#fff;margin-bottom:10px;}
.side-cta p{color:var(--dark-2);font-size:14px;margin-bottom:18px;}
.side-cta .btn{width:100%;}

/* ============ tags / related / prevnext ============ */
.article-foot{max-width:74ch;margin-top:48px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px;}
.tag{padding:6px 14px;border:1px solid var(--line);border-radius:var(--r-pill);font-size:13px;color:var(--text-2);background:var(--surface);}
.tag:hover{border-color:var(--accent);color:var(--accent);}
.section-title{font-size:clamp(1.3rem,2.2vw,1.7rem);font-weight:900;letter-spacing:-.02em;margin-bottom:18px;}
.related-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-bottom:36px;}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t);height:100%;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.card .cover{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.card .cover img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.card:hover .cover img{transform:scale(1.03);}
.card .card-body{padding:16px 18px 20px;}
.card .card-body h3{font-size:16px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:8px;}
.card .card-body h3 a{color:var(--ink);}
.card .card-body h3 a:hover{color:var(--accent);}
.card .card-body time{font-size:13px;color:var(--text-2);}
.prevnext{display:grid;grid-template-columns:1fr;gap:14px;margin:10px 0 34px;}
@media (min-width:768px){.prevnext{grid-template-columns:1fr 1fr;}}
.pn{display:block;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);transition:all var(--t);}
.pn:hover{border-color:var(--accent);box-shadow:var(--sh-2);transform:translateY(-3px);}
.pn .pn-label{font-size:12px;letter-spacing:.08em;color:var(--text-2);font-weight:800;margin-bottom:6px;}
.pn .pn-title{font-weight:700;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.pn:hover .pn-title{color:var(--accent);}
.back-row{margin-bottom:40px;}

/* ============ comment form ============ */
.form-section{border-top:1px solid var(--line);padding-top:36px;}
.form-grid{display:grid;grid-template-columns:1fr;gap:18px;}
@media (min-width:768px){.form-grid{grid-template-columns:1fr 1fr;}}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:14px;color:var(--text-2);font-weight:600;}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);
  padding:12px 14px;font-size:15px;font-family:inherit;color:var(--ink);transition:border-color var(--t),box-shadow var(--t);
}
.field input{height:48px;}
.field textarea{min-height:130px;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14);}
.form-note{font-size:13px;color:var(--text-2);}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:6px;}

/* ============ cta band ============ */
.cta-band{padding:0 0 80px;}
.cta-inner{
  background:var(--ink);border-radius:var(--r-lg);padding:40px 28px;
  display:flex;flex-direction:column;gap:22px;
}
@media (min-width:768px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:52px 48px;}
}
.cta-inner h2{color:#fff;font-size:clamp(1.6rem,3vw,2.3rem);}
.cta-inner p{color:var(--dark-2);font-size:15px;margin-top:12px;max-width:56ch;}
.cta-inner .btn{flex:0 0 auto;height:54px;}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:var(--dark-2);padding:64px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:576px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:992px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:18px;margin-bottom:14px;}
.footer-brand .brand-mark{background:transparent;border-color:rgba(255,255,255,.16);}
.site-footer p{font-size:14px;line-height:1.8;color:var(--dark-2);max-width:34ch;}
.site-footer h4{font-size:14px;letter-spacing:.06em;color:#fff;margin-bottom:16px;font-weight:800;}
.site-footer .footer-grid a{display:block;font-size:15px;color:var(--dark-2);padding:5px 0;transition:color var(--t);}
.site-footer .footer-grid a:hover{color:#fff;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--dark-2);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between;align-items:center;}}

/* ============ float cta ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:1020;
  display:inline-flex;align-items:center;gap:10px;height:54px;padding:0 26px;
  background:var(--accent);color:#fff;border-radius:var(--r-pill);font-weight:800;font-size:15px;
  box-shadow:0 14px 34px rgba(255,74,28,.34);
  opacity:0;transform:translateY(16px);pointer-events:none;
  transition:opacity var(--t),transform var(--t),background var(--t);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--accent-hover);color:#fff;}
@media (max-width:767px){
  .float-cta{
    left:0;right:0;bottom:0;height:56px;border-radius:0;justify-content:center;
    padding:0 18px calc(0px + env(safe-area-inset-bottom));
    box-shadow:0 -8px 24px rgba(23,21,17,.14);
  }
}

/* ============ reveal ============ */
.fade-up{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.fade-up.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .fade-up{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink:#171511;
  --accent:#FF4A1C;
  --accent-hover:#E23A0F;
  --lime:#C6F24E;
  --bg:#F6F2EA;
  --surface:#FFFFFF;
  --surface-2:#FBF8F2;
  --line:#E6DFD3;
  --text-2:#6E675D;
  --dark-2:#B9B2A6;
  --r-btn:10px;
  --r-card:18px;
  --r-lg:28px;
  --shadow-1:0 1px 2px rgba(23,21,17,.04);
  --shadow-2:0 18px 40px rgba(23,21,17,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --t:.25s var(--ease);

  --bs-primary:#FF4A1C;
  --bs-primary-rgb:255,74,28;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --bs-body-color:#171511;
  --bs-body-bg:#F6F2EA;
  --bs-border-radius:10px;
  --bs-border-color:#E6DFD3;
  --bs-link-color:#FF4A1C;
  --bs-link-hover-color:#E23A0F;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--bs-body-font-family);
  font-size:16.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.02em;line-height:1.15;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.wrap{
  width:100%;
  max-width:1320px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:768px){ .wrap{padding:0 32px;} }
@media (min-width:1400px){ .wrap{max-width:1440px;} }

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,242,234,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(23,21,17,.08);}
.nav-bar{
  display:flex;align-items:center;gap:18px;
  height:72px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-weight:900;font-size:18px;letter-spacing:-.02em;
  white-space:nowrap;
}
.brand .brand-mark{
  width:34px;height:34px;flex:0 0 34px;
  display:grid;place-items:center;
  border:1px solid var(--ink);border-radius:11px;
  background:var(--ink);
}
.brand .brand-full{display:none;}
.brand .brand-short{display:inline;}
@media (min-width:768px){ .brand .brand-short{display:none;} .brand .brand-full{display:inline;} }

.main-nav{display:none;align-items:center;gap:2px;margin-left:12px;}
.main-nav .nav-link{
  position:relative;
  padding:10px 18px;
  font-size:15.5px;font-weight:600;color:var(--ink);
  border-radius:0;
  transition:color var(--t);
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:18px;right:18px;bottom:4px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--t);
}
.main-nav .nav-link:hover{color:var(--accent);}
.main-nav .nav-link:hover::after{transform:scaleX(1);}
.main-nav .nav-link.is-active{font-weight:900;}
.main-nav .nav-link.is-active::after{transform:scaleX(1);}
@media (min-width:992px){ .main-nav{display:flex;} }

.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-search{display:none;}
@media (min-width:1200px){ .nav-search{display:block;} }
.nav-search input{
  width:220px;height:42px;padding:0 18px;
  border-radius:999px;border:1px solid var(--line);
  background:var(--surface);font-size:14px;
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search input::placeholder{color:var(--text-2);}
.nav-search input:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(255,74,28,.14);
}
.btn-ghost{
  display:none;
  padding:10px 14px;font-weight:700;font-size:15px;
  border-radius:var(--r-btn);
  transition:color var(--t);
}
.btn-ghost:hover{color:var(--accent);}
@media (min-width:768px){ .btn-ghost{display:inline-flex;} }

.btn{
  border-radius:var(--r-btn)!important;
  font-weight:700;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
  border-width:1px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn:active{transform:translateY(1px);}
.btn-accent{
  background:var(--accent);border-color:var(--accent);color:#fff;
  padding:0 24px;height:48px;font-size:15.5px;
}
.btn-accent:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-outline-ink{
  background:transparent;border:1px solid var(--ink);color:var(--ink);
  padding:0 24px;height:48px;font-size:15.5px;
}
.btn-outline-ink:hover{background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn-lg-cta{height:54px;padding:0 28px;font-size:16px;}
.nav-cta{height:44px;padding:0 20px;font-size:15px;}

.nav-toggle{
  display:inline-grid;place-items:center;
  width:44px;height:44px;border:1px solid var(--line);
  background:var(--surface);border-radius:12px;
  transition:border-color var(--t),background var(--t);
}
.nav-toggle:hover{border-color:var(--ink);}
@media (min-width:992px){ .nav-toggle{display:none;} }

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,21,17,.5);
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
  z-index:1040;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(88vw,360px);
  background:var(--bg);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .3s var(--ease);
  z-index:1050;padding:22px 20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-search input{
  width:100%;height:46px;border-radius:999px;border:1px solid var(--line);
  padding:0 18px;background:var(--surface);font-size:14.5px;
}
.drawer-search input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14);}
.drawer-actions{display:grid;gap:10px;margin:18px 0 22px;}
.drawer-actions .btn{width:100%;}
.drawer-nav a{
  display:block;padding:14px 12px;border-radius:12px;
  font-weight:700;font-size:16px;border-bottom:1px solid var(--line);
}
.drawer-nav a:hover{background:var(--surface-2);color:var(--accent);}
.drawer-nav a.is-active{color:var(--accent);}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:18px 0 0;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--text-2);
}
.crumb a{transition:color var(--t);}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:var(--line);}
.crumb .current{color:var(--ink);font-weight:700;}

/* ---------- 宽幅 Banner ---------- */
.cat-banner{
  position:relative;
  margin-top:20px;
  min-height:250px;
  border-radius:var(--r-lg);
  overflow:hidden;
  display:flex;align-items:flex-end;
  background:#171511 url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.cat-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(23,21,17,.94) 0%,rgba(23,21,17,.74) 46%,rgba(23,21,17,.28) 100%);
}
.cat-banner-inner{
  position:relative;z-index:1;
  padding:34px 26px 34px;
  max-width:840px;
}
@media (min-width:768px){
  .cat-banner{min-height:300px;}
  .cat-banner-inner{padding:52px 48px;}
}
.cat-banner .kicker{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--lime);color:var(--ink);
  border-radius:999px;padding:6px 14px;
  font-size:12px;font-weight:700;letter-spacing:.08em;
  margin-bottom:18px;
}
.cat-banner h1{
  color:#fff;
  font-size:clamp(2rem,4.6vw,3.4rem);
  line-height:1.08;letter-spacing:-.03em;
}
.cat-banner p{
  color:var(--dark-2);
  margin-top:16px;font-size:16px;line-height:1.75;
  max-width:660px;
}
.cat-banner .banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cat-banner .btn-outline-ink{border-color:rgba(255,255,255,.42);color:#fff;}
.cat-banner .btn-outline-ink:hover{background:#fff;color:var(--ink);border-color:#fff;}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;}
@media (min-width:992px){ .section{padding:104px 0;} }
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.1em;
  color:var(--text-2);margin-bottom:14px;
}
.section-head h2{font-size:clamp(1.75rem,3.4vw,2.6rem);}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16.5px;}
.section-alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---------- 图文卡网格 ---------- */
.feature-grid{
  display:grid;gap:24px;
  grid-template-columns:1fr;
}
@media (min-width:768px){ .feature-grid{grid-template-columns:repeat(2,1fr);gap:20px;} }
@media (min-width:1200px){ .feature-grid{grid-template-columns:repeat(3,1fr);gap:24px;} }

.f-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  display:flex;flex-direction:column;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.f-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#d9cfbd;}
.f-thumb{
  position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);
}
.f-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease);}
.f-card:hover .f-thumb img{transform:scale(1.03);}
.f-thumb .tag{
  position:absolute;left:14px;top:14px;
  background:var(--lime);color:var(--ink);
  border-radius:999px;padding:5px 12px;
  font-size:12px;font-weight:700;letter-spacing:.08em;
}
.f-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.f-body h3{font-size:1.25rem;font-weight:700;letter-spacing:-.01em;}
.f-body p{color:var(--text-2);font-size:15px;line-height:1.8;}
.f-more{
  margin-top:auto;padding-top:12px;
  display:inline-flex;align-items:center;gap:8px;
  color:var(--accent);font-weight:700;font-size:14.5px;
  transition:gap var(--t),color var(--t);
}
.f-card:hover .f-more{gap:14px;color:var(--accent-hover);}

/* ---------- 引言数据带 ---------- */
.quote-band{
  background:var(--ink);color:#fff;
  border-radius:var(--r-lg);
  padding:38px 26px;
  display:flex;gap:18px;align-items:flex-start;
}
@media (min-width:768px){ .quote-band{padding:56px 52px;gap:26px;align-items:center;} }
.quote-dot{
  flex:0 0 14px;width:14px;height:14px;border-radius:50%;
  background:var(--lime);margin-top:8px;
  box-shadow:0 0 0 6px rgba(198,242,78,.16);
}
@media (min-width:768px){ .quote-dot{margin-top:0;} }
.quote-band .quote-main{
  font-size:clamp(1.35rem,2.6vw,2.1rem);
  font-weight:900;letter-spacing:-.02em;line-height:1.35;
}
.quote-band .quote-sub{margin-top:14px;color:var(--dark-2);font-size:15.5px;}

/* ---------- 使用要点分栏 ---------- */
.steps-layout{display:grid;gap:32px;grid-template-columns:1fr;}
@media (min-width:992px){
  .steps-layout{grid-template-columns:7fr 5fr;gap:56px;align-items:start;}
}
.step-row{
  display:grid;grid-template-columns:56px 1fr;gap:18px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.step-row:first-child{padding-top:4px;}
.step-row:last-child{border-bottom:0;}
.step-num{
  font-family:Inter,system-ui,sans-serif;
  font-weight:900;font-size:28px;line-height:1;
  color:transparent;-webkit-text-stroke:1.4px var(--accent);
  padding-top:4px;
}
.step-row h3{font-size:1.2rem;font-weight:700;margin-bottom:8px;}
.step-row p{color:var(--text-2);font-size:15.5px;}
.steps-visual{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);
  box-shadow:var(--shadow-1);
}
.steps-visual .ratio{aspect-ratio:3/2;overflow:hidden;background:var(--surface-2);}
.steps-visual img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.steps-visual:hover img{transform:scale(1.03);}
.steps-visual .caption{
  padding:20px 22px;font-size:14.5px;color:var(--text-2);
  border-top:1px solid var(--line);
}
.check-list{margin-top:26px;display:grid;gap:12px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;font-weight:600;}
.check-list svg{flex:0 0 20px;margin-top:4px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;}
.accordion-item{
  background:var(--surface);
  border:1px solid var(--line)!important;
  border-radius:var(--r-card)!important;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:border-color var(--t),box-shadow var(--t);
}
.accordion-item:hover{box-shadow:var(--shadow-2);}
.accordion-button{
  background:var(--surface)!important;
  color:var(--ink)!important;
  font-weight:700;font-size:16.5px;
  padding:22px 24px;
  box-shadow:none!important;
  border-radius:0!important;
}
.accordion-button:not(.collapsed){color:var(--accent)!important;}
.accordion-button::after{
  width:16px;height:16px;background-size:16px;
  filter:none;opacity:.75;
}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(255,74,28,.16)!important;}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid var(--accent)!important;}
.accordion-body{
  padding:0 24px 24px;color:var(--text-2);font-size:16px;line-height:1.8;
}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--ink);color:#fff;
  border-radius:var(--r-lg);
  padding:40px 26px;
  display:flex;flex-direction:column;gap:24px;
}
@media (min-width:992px){
  .cta-band{padding:56px 60px;flex-direction:row;align-items:center;justify-content:space-between;gap:40px;}
}
.cta-band h2{font-size:clamp(1.6rem,2.8vw,2.3rem);color:#fff;max-width:620px;}
.cta-band p{color:var(--dark-2);margin-top:12px;font-size:15.5px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-band .btn-outline-ink{border-color:rgba(255,255,255,.42);color:#fff;}
.cta-band .btn-outline-ink:hover{background:#fff;color:var(--ink);border-color:#fff;}
.cta-note{margin-top:22px;font-size:13.5px;color:var(--text-2);}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1020;
  display:none;align-items:center;gap:10px;
  background:var(--accent);color:#fff;
  border-radius:999px;padding:16px 26px;
  font-weight:700;font-size:15.5px;
  box-shadow:0 14px 32px rgba(255,74,28,.32);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity var(--t),transform var(--t),background var(--t);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--accent-hover);}
@media (min-width:768px){ .float-cta{display:inline-flex;} }
@media (max-width:767px){
  .float-cta{
    display:flex;left:0;right:0;bottom:0;
    border-radius:0;justify-content:center;
    padding:16px 20px calc(16px + env(safe-area-inset-bottom));
    opacity:1;transform:none;pointer-events:auto;
  }
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:72px;
  background:var(--ink);color:#fff;
  padding:64px 0 28px;
}
.footer-grid{display:grid;gap:36px;grid-template-columns:1fr;}
@media (min-width:768px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:992px){ .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;} }
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-weight:900;font-size:18px;margin-bottom:14px;
}
.footer-brand .brand-mark{
  width:32px;height:32px;display:grid;place-items:center;
  border-radius:10px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.16);
}
.site-footer p{color:var(--dark-2);font-size:15px;line-height:1.8;}
.site-footer h4{
  font-size:14px;letter-spacing:.06em;font-weight:700;
  color:#fff;margin-bottom:18px;
}
.site-footer a{
  display:block;color:var(--dark-2);font-size:15px;
  padding:6px 0;transition:color var(--t),transform var(--t);
}
.site-footer a:hover{color:#fff;transform:translateX(3px);}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  color:var(--dark-2);font-size:13.5px;
}

/* ---------- 动效 ---------- */
.fade-up{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.fade-up.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;}
  html{scroll-behavior:auto;}
  .fade-up{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --ink:#171511;
  --ink-2:#B9B2A6;
  --accent:#FF4A1C;
  --accent-hover:#E23A0F;
  --lime:#C6F24E;
  --bg:#F6F2EA;
  --surface:#FFFFFF;
  --surface-2:#FBF8F2;
  --line:#E6DFD3;
  --text-2:#6E675D;
  --r-btn:10px;
  --r-card:18px;
  --r-lg:28px;
  --sh-1:0 1px 2px rgba(23,21,17,.04);
  --sh-2:0 18px 40px rgba(23,21,17,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --nav-h:72px;

  --bs-primary:#FF4A1C;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --bs-body-color:#171511;
  --bs-border-radius:10px;
  --bs-link-color:#171511;
  --bs-link-hover-color:#FF4A1C;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:var(--lime);color:var(--ink)}

.wrap{width:100%;max-width:1320px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.wrap{padding:0 32px}}
@media(min-width:1400px){.wrap{max-width:1440px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-weight:700;font-size:15.5px;line-height:1;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 18px rgba(255,74,28,.20)}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 14px 28px rgba(255,74,28,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border:1px solid var(--ink);color:var(--ink);background:transparent}
.btn-outline:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-lg{height:54px;padding:0 28px;font-size:16px}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:15px;color:var(--ink);padding:8px 10px;border-radius:8px;transition:color .25s var(--ease)}
.btn-text:hover{color:var(--accent)}
.btn-text svg{transition:transform .25s var(--ease)}
.btn-text:hover svg{transform:translateX(4px)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,242,234,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 26px rgba(23,21,17,.07)}
.header-inner{display:flex;align-items:center;gap:18px;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-text{font-weight:900;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;justify-content:center}
.main-nav .nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:var(--ink);
  white-space:nowrap;border-radius:8px;
  transition:color .25s var(--ease);
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
.main-nav .nav-link:hover{color:var(--accent)}
.main-nav .nav-link:hover::after{transform:scaleX(1)}
.main-nav .nav-link.is-active{font-weight:800}
.main-nav .nav-link.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-search{
  display:flex;align-items:center;gap:8px;width:220px;height:42px;
  padding:0 14px;background:var(--surface);
  border:1px solid var(--line);border-radius:999px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.nav-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14)}
.nav-search input{border:0;outline:0;background:transparent;flex:1;min-width:0;font-size:14.5px;color:var(--ink)}
.nav-search input::placeholder{color:#A79F92}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);align-items:center;justify-content:center;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--accent)}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,21,17,.5);z-index:1050;
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(340px,86vw);
  background:var(--surface);z-index:1060;padding:22px;
  transform:translateX(101%);transition:transform .32s var(--ease);
  overflow-y:auto;box-shadow:-20px 0 50px rgba(23,21,17,.18);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}
.drawer-head .brand-text{font-size:16px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);font-size:20px;line-height:1;color:var(--ink)}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:46px;padding:0 14px;
  background:var(--surface-2);border:1px solid var(--line);border-radius:999px;margin-bottom:18px;
}
.drawer-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14)}
.drawer-search input{border:0;outline:0;background:transparent;flex:1;min-width:0;font-size:15px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px}
.drawer-nav a{
  padding:12px 14px;border-radius:10px;font-size:16px;font-weight:600;
  border-left:3px solid transparent;transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.drawer-nav a:hover{background:var(--surface-2);border-left-color:var(--lime);color:var(--accent)}
.drawer-nav a.is-active{background:var(--surface-2);border-left-color:var(--accent);color:var(--accent)}
.drawer-actions{display:grid;gap:10px}
.drawer-actions .btn{width:100%}

/* ---------- 页面头部 ---------- */
main{display:block}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--text-2);padding:26px 0 0;
}
.crumbs a{transition:color .25s var(--ease)}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{color:#C7BFB1}
.crumbs .current{color:var(--ink);font-weight:700}

.index-hero{padding:22px 0 40px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--lime);color:var(--ink);border-radius:999px;
  padding:6px 14px;font-size:12px;font-weight:800;letter-spacing:.08em;
  margin-bottom:18px;
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--ink)}
.page-title{
  font-size:clamp(2rem,4.6vw,3.4rem);font-weight:900;letter-spacing:-.03em;
  line-height:1.08;margin:0 0 16px;max-width:16em;
}
.page-title .mark-lime{box-shadow:inset 0 -.34em 0 var(--lime)}
.page-lead{font-size:17px;color:var(--text-2);max-width:720px;margin:0 0 26px}
.index-search{
  display:flex;align-items:center;gap:12px;max-width:640px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  padding:8px 8px 8px 16px;box-shadow:var(--sh-1);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.index-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,74,28,.14)}
.index-search svg{flex:0 0 auto;color:var(--text-2)}
.index-search input{border:0;outline:0;background:transparent;flex:1;min-width:0;height:32px;font-size:16px;color:var(--ink)}
.index-search input::placeholder{color:#A79F92}
.index-search .btn{height:44px;padding:0 22px}
.search-hints{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.search-hints a{
  font-size:13.5px;color:var(--text-2);border:1px dashed var(--line);
  padding:5px 12px;border-radius:999px;
  transition:color .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease);
}
.search-hints a:hover{color:var(--accent);border-color:var(--accent);background:#fff}

/* ---------- 索引主体 ---------- */
.index-body{
  display:grid;grid-template-columns:3fr 9fr;gap:32px;
  padding:8px 0 96px;
}
.toc{position:sticky;top:96px;align-self:start}
.toc-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
}
.toc-title{font-size:12px;letter-spacing:.08em;font-weight:800;color:var(--text-2);margin:0 0 14px}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:flex;align-items:center;gap:10px;
  padding:11px 12px;border-left:3px solid transparent;border-radius:10px;
  font-size:15px;color:var(--ink);
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.toc-list a .num{font-family:Inter,"Segoe UI",sans-serif;font-weight:900;font-size:12px;color:#B4AC9E;letter-spacing:.04em;transition:color .25s var(--ease)}
.toc-list a:hover{background:var(--surface-2);border-left-color:var(--lime);color:var(--accent)}
.toc-list a:hover .num{color:var(--accent)}
.toc-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--text-2);line-height:1.75;
}

.groups{display:flex;flex-direction:column;gap:18px}
.group{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.group:hover{box-shadow:var(--sh-2);border-color:#DED5C6}
.group>summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;
  padding:20px 22px;font-size:17px;font-weight:800;
  transition:background .25s var(--ease),color .25s var(--ease);
}
.group>summary::-webkit-details-marker{display:none}
.group>summary:hover{background:var(--surface-2)}
.group>summary .g-num{
  font-family:Inter,"Segoe UI",sans-serif;font-weight:900;font-size:13px;
  color:var(--accent);letter-spacing:.06em;
}
.group>summary .g-meta{margin-left:auto;display:flex;align-items:center;gap:10px}
.group>summary .g-count{font-size:13px;color:var(--text-2);font-weight:600}
.group>summary .chev{color:var(--text-2);transition:transform .25s var(--ease)}
.group[open]>summary .chev{transform:rotate(180deg)}
.row-list{border-top:1px solid var(--line);padding:6px 0 10px}
.row{
  display:flex;align-items:center;gap:12px;min-height:44px;
  padding:8px 22px;border-left:3px solid transparent;
  font-size:15.5px;color:var(--ink);
  transition:background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.row:hover{background:var(--surface-2);border-left-color:var(--lime);color:var(--accent)}
.row .row-dot{width:6px;height:6px;border-radius:50%;background:var(--line);flex:0 0 auto;transition:background .25s var(--ease)}
.row:hover .row-dot{background:var(--accent)}
.row .row-arrow{margin-left:auto;opacity:0;transform:translateX(-6px);color:var(--accent);transition:opacity .25s var(--ease),transform .25s var(--ease)}
.row:hover .row-arrow{opacity:1;transform:translateX(0)}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 96px}
.cta-inner{
  background:var(--ink);border-radius:var(--r-lg);
  padding:52px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;color:#fff;
}
.cta-inner h2{font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:900;margin:0 0 10px}
.cta-inner p{color:var(--ink-2);font-size:15.5px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-actions .btn-outline{border-color:rgba(255,255,255,.35);color:#fff}
.cta-actions .btn-outline:hover{background:#fff;color:var(--ink);border-color:#fff}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;padding:76px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px 32px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:17px;margin-bottom:14px}
.site-footer p{color:var(--ink-2);font-size:15px;line-height:1.8;max-width:330px}
.site-footer h4{font-size:14px;letter-spacing:.06em;color:#fff;margin:0 0 16px;font-weight:800}
.site-footer .footer-grid a{
  display:block;color:var(--ink-2);font-size:15px;padding:6px 0;
  transition:color .25s var(--ease),transform .25s var(--ease);
}
.site-footer .footer-grid a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.12);margin-top:52px;padding-top:22px;
  font-size:13.5px;color:var(--ink-2);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:inline-flex;align-items:center;gap:10px;
  height:54px;padding:0 26px;border-radius:999px;
  background:var(--accent);color:#fff;font-weight:800;font-size:15.5px;
  box-shadow:0 14px 32px rgba(255,74,28,.30);
  opacity:0;transform:translateY(16px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .25s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--accent-hover);transform:translateY(-2px)}

/* ---------- 响应式 ---------- */
@media(max-width:1399px){
  .page-title{max-width:18em}
}
@media(max-width:1199px){
  .nav-search{width:170px}
  .main-nav .nav-link{padding:10px 10px;font-size:14.5px}
  .main-nav .nav-link::after{left:10px;right:10px}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:36px 28px}
}
@media(max-width:991px){
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{justify-content:space-between}
  .index-body{grid-template-columns:1fr;gap:24px;padding-bottom:72px}
  .toc{position:static}
  .toc-card{padding:16px}
  .toc-list{flex-direction:row;flex-wrap:wrap;gap:8px}
  .toc-list a{border:1px solid var(--line);border-left:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:14px}
  .toc-list a:hover{border-color:var(--accent);border-left-color:var(--accent)}
  .toc-note{display:none}
  .cta-inner{padding:38px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .site-footer{padding:60px 0 26px}
}
@media(max-width:767px){
  :root{--nav-h:64px}
  .brand-text{font-size:15.5px}
  .header-actions .btn-text{display:none}
  .header-actions .btn-primary{height:42px;padding:0 18px;font-size:14.5px}
  .page-title{font-size:2rem}
  .page-lead{font-size:16px}
  .index-hero{padding:16px 0 30px}
  .index-search{flex-wrap:wrap;border-radius:16px;padding:10px;gap:10px}
  .index-search .search-field{width:100%;display:flex;align-items:center;gap:10px;padding:0 6px}
  .index-search .btn{width:100%}
  .cta-band{padding:0 0 76px}
  .cta-inner{padding:30px 22px;border-radius:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .float-cta{
    left:0;right:0;bottom:0;height:56px;border-radius:0;
    justify-content:center;padding:0 20px calc(env(safe-area-inset-bottom) / 2);
  }
  .float-cta:hover{transform:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  body{padding-bottom:56px}
}
@media(max-width:575px){
  .wrap{padding:0 18px}
  .group>summary{padding:16px 16px;font-size:16px;gap:10px}
  .group>summary .g-count{display:none}
  .row{padding:8px 16px;font-size:15px}
  .cta-inner h2{font-size:1.4rem}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
  html{scroll-behavior:auto}
}