/* roulang page: index */
:root{
  --brand-900:#083F3A;
  --brand-700:#0B6E63;
  --brand-500:#12A594;
  --brand-300:#6BD8C6;
  --accent-500:#FF6B4A;
  --accent-200:#FFD9CF;
  --gold-400:#F5B301;
  --bg:#F6F7F4;
  --bg-card:#FFFFFF;
  --ink:#10201E;
  --ink-2:#4A5C59;
  --line:#E2E7E3;
  --grad-brand:linear-gradient(135deg,#083F3A 0%,#0B6E63 38%,#12A594 68%,#5AD6B8 100%);
  --grad-hot:linear-gradient(120deg,#FF6B4A 0%,#F5B301 100%);
  --grad-veil:linear-gradient(180deg,rgba(8,63,58,0) 45%,rgba(8,63,58,.86) 100%);
  --shadow-1:0 2px 8px rgba(8,63,58,.06);
  --shadow-2:0 12px 32px rgba(8,63,58,.10);
  --shadow-3:0 20px 48px rgba(8,63,58,.16);
  --r-lg:28px;
  --r-md:20px;
  --r-v:24px;
  --r-sm:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:28px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,247,244,.94);
  border-bottom:1px solid transparent;
  transition:height .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(246,247,244,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.01em;color:var(--brand-900)}
.logo-mark{width:28px;height:28px;flex:none;color:var(--brand-700)}
.logo-mark .dot{fill:currentColor}
.logo-mark .wave{stroke:var(--accent-500);fill:none;stroke-width:1.8;stroke-linecap:round}
.nav{display:flex;align-items:center;gap:6px}
.nav a{
  position:relative;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  border-radius:999px;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--grad-brand);transform:scaleX(0);transform-origin:left center;
  transition:transform .22s var(--ease);border-radius:2px;
}
.nav a:hover{color:var(--brand-700)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.active{background:var(--grad-brand);color:#fff;padding:8px 16px}
.nav a.active::after{display:none}
.header-cta{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;text-align:center;
  border-radius:999px;font-weight:600;font-size:15px;
  padding:12px 24px;line-height:1.2;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),filter .22s var(--ease);
}
.btn-primary{background:var(--grad-hot);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(.94);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-700);border:1px solid var(--brand-500)}
.btn-ghost:hover{background:#F0F6F4;transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--brand-900)}
.btn-light:hover{background:var(--brand-900);color:#fff;transform:translateY(-2px)}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.72)}
.btn-outline-light:hover{background:rgba(255,255,255,.14)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;
  border-radius:12px;align-items:center;justify-content:center;cursor:pointer;flex:none;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);border-radius:2px;position:relative;transition:transform .22s var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--brand-900);border-radius:2px;
  transition:transform .22s var(--ease),top .22s var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg)}
.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(8,63,58,.42);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),visibility .22s var(--ease);z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:340px;background:#fff;
  transform:translateX(100%);transition:transform .24s var(--ease);z-index:80;
  padding:24px 20px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .drawer-title{font-size:13px;color:var(--ink-2);letter-spacing:.08em;margin-bottom:6px}
.drawer a.drawer-link{
  padding:12px 14px;border-radius:var(--r-sm);font-size:15px;font-weight:500;color:var(--ink-2);
  border:1px solid var(--line);
}
.drawer a.drawer-link:hover{color:var(--brand-700);border-color:var(--brand-300)}
.drawer a.drawer-link.active{background:var(--grad-brand);color:#fff;border-color:transparent}
.drawer .btn{margin-top:12px;width:100%}
.drawer .drawer-note{font-size:13px;line-height:22px;color:var(--ink-2);margin-top:14px}

/* ---------- Hero ---------- */
.hero{padding:64px 0 72px}
.hero-inner{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center}
.hero-copy{grid-column:span 6}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-200);color:#7A2A16;
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--accent-500);display:block}
.hero h1{font-size:40px;line-height:48px;font-weight:700;letter-spacing:-.01em;margin:20px 0 0}
.hero h1 em{font-style:normal;background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;line-height:28px;color:var(--ink-2);margin-top:16px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-stats{display:flex;gap:28px;margin-top:36px;flex-wrap:wrap}
.hero-stats .stat{min-width:96px}
.hero-stats .stat b{display:block;font-size:24px;font-weight:800;color:var(--brand-700);font-variant-numeric:tabular-nums}
.hero-stats .stat span{font-size:13px;color:var(--ink-2)}
.hero-visual{grid-column:span 6;display:flex;justify-content:center;position:relative}
.phone-stack{position:relative;width:300px;padding:16px 0}
.phone-card{
  position:relative;aspect-ratio:9/16;border-radius:var(--r-lg);overflow:hidden;
  background:var(--grad-brand);box-shadow:var(--shadow-2);
}
.phone-card img{width:100%;height:100%;object-fit:cover}
.phone-card.main{position:relative;z-index:3;box-shadow:var(--shadow-3)}
.phone-card.side-a,.phone-card.side-b{
  position:absolute;top:26px;width:280px;z-index:2;opacity:.72;
}
.phone-card.side-a{left:-30px;transform:rotate(-4deg) scale(.9);transform-origin:bottom right}
.phone-card.side-b{right:-30px;top:52px;transform:rotate(4deg) scale(.8);transform-origin:bottom left;opacity:.5}
.phone-card .veil{position:absolute;inset:0;background:var(--grad-veil)}
.phone-top-badge{
  position:absolute;top:14px;left:14px;z-index:4;
  background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.4);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  color:#fff;font-size:12px;font-weight:700;letter-spacing:.06em;
  padding:5px 12px;border-radius:999px;font-variant-numeric:tabular-nums;
}
.phone-bottom{position:absolute;left:16px;right:16px;bottom:16px;z-index:4;color:#fff}
.phone-bottom h3{font-size:18px;line-height:26px;font-weight:600}
.phone-bottom p{font-size:13px;line-height:20px;color:rgba(255,255,255,.78);margin-top:6px}
.play-btn{
  position:absolute;right:16px;bottom:16px;z-index:5;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;
  background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.5);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.phone-bottom{padding-right:56px}

/* ---------- 区块通用 ---------- */
.section{padding:0 0 72px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2{font-size:30px;line-height:38px;font-weight:700;letter-spacing:-.01em}
.section-head p{font-size:14px;line-height:22px;color:var(--ink-2);margin-top:8px;max-width:640px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--accent-500);font-size:14px;font-weight:600;white-space:nowrap}
.text-link em{font-style:normal;transition:transform .2s var(--ease)}
.text-link:hover em{transform:translateX(3px)}

/* ---------- 横向轨道 ---------- */
.rail-wrap{position:relative}
.rail{
  display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 16px;scrollbar-width:none;-ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none}
.rail-wrap::after{
  content:"";position:absolute;top:0;right:0;bottom:16px;width:72px;pointer-events:none;
  background:linear-gradient(90deg,rgba(246,247,244,0) 0%,rgba(246,247,244,.96) 100%);
  border-radius:0 var(--r-md) var(--r-md) 0;
}
.rail-card{
  flex:0 0 260px;width:260px;scroll-snap-align:start;
  border-radius:var(--r-v);overflow:hidden;background:var(--bg-card);
  box-shadow:var(--shadow-1);border:1px solid var(--line);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.rail-thumb{position:relative;aspect-ratio:9/16;overflow:hidden;background:var(--grad-brand)}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.rail-card:hover .rail-thumb img{transform:scale(1.04)}
.rail-thumb .veil{position:absolute;inset:0;background:var(--grad-veil)}
.rail-badge{
  position:absolute;top:12px;right:12px;z-index:3;
  background:rgba(8,63,58,.72);color:#fff;font-size:12px;font-weight:700;
  padding:4px 10px;border-radius:999px;font-variant-numeric:tabular-nums;
}
.rail-play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.86);z-index:4;
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.55);color:#fff;
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  opacity:0;transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.rail-card:hover .rail-play{opacity:1;transform:translate(-50%,-50%) scale(1)}
.rail-cap{padding:14px 16px 16px}
.rail-cap h3{font-size:16px;line-height:24px;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rail-cap p{font-size:13px;line-height:20px;color:var(--ink-2);margin-top:6px}
.rail-dots{display:none;justify-content:center;gap:6px;margin-top:8px}
.rail-dots i{width:6px;height:6px;border-radius:50%;background:var(--brand-300)}
.rail-dots i.on{background:var(--brand-700);width:18px;border-radius:999px}

/* ---------- 数据徽章条 ---------- */
.band{background:var(--brand-900);border-radius:24px;padding:32px;color:#fff}
.band-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.band-item{padding:0 24px;border-left:1px solid rgba(255,255,255,.12);text-align:center}
.band-item:first-child{border-left:none;padding-left:0}
.band-item:last-child{padding-right:0}
.band-item b{display:block;font-size:32px;line-height:40px;font-weight:800;color:var(--gold-400);font-variant-numeric:tabular-nums}
.band-item span{font-size:13px;line-height:20px;color:rgba(255,255,255,.72)}

/* ---------- 种草清单 ---------- */
.step-list{display:flex;flex-direction:column;gap:16px}
.step-item{
  position:relative;display:flex;align-items:center;gap:20px;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 24px;overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.step-item::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:4px;border-radius:0 4px 4px 0;
  background:var(--grad-brand);opacity:0;transition:opacity .22s var(--ease);
}
.step-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand-300)}
.step-item:hover::before{opacity:1}
.step-index{
  flex:0 0 72px;font-size:48px;line-height:1;font-weight:800;
  background:var(--grad-hot);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;
}
.step-body{flex:1;min-width:0}
.step-body h3{font-size:20px;line-height:30px;font-weight:600}
.step-body p{font-size:14px;line-height:22px;color:var(--ink-2);margin-top:6px}
.tag{
  display:inline-block;font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;
  background:rgba(107,216,198,.24);color:#0A5B52;white-space:nowrap;
}
.step-arrow{flex:none;color:var(--brand-500);font-size:18px;transition:transform .2s var(--ease)}
.step-item:hover .step-arrow{transform:translateX(4px)}
.steps-two{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{
  display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.news-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--grad-brand)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.04)}
.cat-badge{
  position:absolute;top:12px;left:12px;z-index:3;
  background:var(--grad-brand);color:#fff;font-size:12px;font-weight:600;
  padding:4px 12px;border-radius:999px;max-width:calc(100% - 24px);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.news-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.news-title{
  font-size:18px;line-height:26px;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s var(--ease);
}
.news-card:hover .news-title{color:var(--brand-700)}
.news-summary{
  font-size:14px;line-height:22px;color:var(--ink-2);margin-top:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;line-height:20px;color:var(--ink-2);font-variant-numeric:tabular-nums;
}
.news-arrow{color:var(--brand-500);transition:transform .2s var(--ease)}
.news-card:hover .news-arrow{transform:translateX(4px)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:48px 24px;background:var(--bg-card);
  border:1px dashed var(--line);border-radius:var(--r-md);
}
.empty-state .dot-grid{display:grid;grid-template-columns:repeat(3,8px);gap:6px;justify-content:center;margin-bottom:18px}
.empty-state .dot-grid i{width:8px;height:8px;border-radius:50%;background:var(--brand-300);opacity:.7}
.empty-state p{font-size:15px;color:var(--ink-2)}
.empty-state .btn{margin-top:18px}

/* ---------- 口碑条 ---------- */
.voice{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 16px;scrollbar-width:none}
.voice::-webkit-scrollbar{display:none}
.voice-card{
  flex:0 0 320px;width:320px;scroll-snap-align:start;background:var(--bg-card);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-1);padding:20px;
}
.voice-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.avatar{
  width:48px;height:48px;border-radius:50%;background:var(--grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex:none;
}
.stars{color:var(--gold-400);font-size:14px;letter-spacing:2px}
.voice-text{font-size:14px;line-height:22px;color:var(--ink-2);margin-top:14px;min-height:66px}
.voice-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;font-size:13px;line-height:20px;color:var(--ink-2)}
.voice-foot .src{background:#F0F6F4;color:#0A5B52;padding:3px 10px;border-radius:999px;font-size:12px}

/* ---------- FAQ ---------- */
.faq{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-lg);padding:8px 28px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:none}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:none;border:none;cursor:pointer;text-align:left;
  padding:22px 0;font-size:17px;line-height:26px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-700)}
.faq-icon{
  flex:none;width:30px;height:30px;border-radius:50%;background:rgba(18,165,148,.12);
  color:var(--brand-700);display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;transition:transform .22s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .22s var(--ease),opacity .22s var(--ease)}
.faq-item.is-open .faq-a{opacity:1}
.faq-a p{font-size:15px;line-height:26px;color:var(--ink-2);padding:0 46px 22px 0}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--grad-brand);border-radius:var(--r-lg);
  padding:56px;text-align:center;color:#fff;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:420px;height:420px;border-radius:50%;
  border:2px solid rgba(255,255,255,.08);box-shadow:0 0 0 40px rgba(255,255,255,.04),0 0 0 90px rgba(255,255,255,.03);
  pointer-events:none;
}
.cta-band h2{font-size:30px;line-height:38px;font-weight:700;position:relative;z-index:2}
.cta-band p{font-size:15px;line-height:26px;color:rgba(255,255,255,.82);margin-top:12px;position:relative;z-index:2}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px;position:relative;z-index:2}
.cta-note{font-size:12px;line-height:20px;color:rgba(255,255,255,.72);margin-top:22px;position:relative;z-index:2}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-900);color:#fff;padding:64px 0 28px;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{color:#fff;font-size:18px}
.footer-brand .logo-mark{color:var(--brand-300)}
.footer-brand p{font-size:14px;line-height:24px;color:rgba(255,255,255,.72);margin-top:16px;max-width:320px}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{
  width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.24);color:rgba(255,255,255,.82);font-size:13px;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.socials a:hover{background:var(--brand-500);color:#fff;transform:translateY(-2px);border-color:transparent}
.footer-col h4{font-size:15px;line-height:24px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li span{font-size:14px;line-height:22px;color:rgba(255,255,255,.72)}
.footer-col a{transition:color .2s var(--ease),text-underline-offset .2s var(--ease)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.12);margin-top:48px;padding-top:22px;
  font-size:13px;line-height:22px;color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero h1{font-size:36px;line-height:44px}
  .band-item{padding:0 16px}
}
@media (max-width:1023px){
  .nav{display:none}
  .header-cta .btn{display:none}
  .nav-toggle{display:flex}
  .hero{padding:44px 0 56px}
  .hero-copy{grid-column:span 12}
  .hero-visual{grid-column:span 12;margin-top:36px}
  .hero-sub{max-width:100%}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .band-grid{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .band-item:nth-child(3){border-left:none;padding-left:0}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .steps-two{grid-template-columns:1fr}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding-bottom:48px}
  .hero h1{font-size:28px;line-height:36px}
  .hero-sub{font-size:15px;line-height:26px}
  .section-head{flex-direction:column;align-items:flex-start}
  .section-head h2{font-size:22px;line-height:30px}
  .hero-actions .btn{width:100%}
  .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;width:100%}
  .phone-stack{width:78vw;max-width:300px}
  .phone-card.side-a,.phone-card.side-b{display:none}
  .rail-card{flex:0 0 72vw;width:72vw}
  .rail-wrap::after{width:40px}
  .voice-card{flex:0 0 78vw;width:78vw}
  .rail-dots{display:flex}
  .step-item{padding:18px;gap:14px;align-items:flex-start;flex-wrap:wrap}
  .step-index{flex:0 0 40px;font-size:32px}
  .step-body h3{font-size:18px;line-height:26px}
  .step-body{flex:1 1 60%}
  .tag{order:4}
  .step-arrow{display:none}
  .news-grid{grid-template-columns:1fr}
  .band{padding:24px 18px;border-radius:20px}
  .band-grid{grid-template-columns:repeat(2,1fr)}
  .band-item{padding:0 12px;text-align:left}
  .band-item b{font-size:26px;line-height:34px}
  .faq{padding:4px 18px}
  .faq-q{font-size:16px;padding:18px 0}
  .faq-a p{padding:0 0 18px 0}
  .cta-band{padding:32px 20px}
  .cta-band h2{font-size:22px;line-height:30px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:48px 0 24px}
}
@media (max-width:480px){
  .hero h1{font-size:26px;line-height:34px}
  .hero-stats{grid-template-columns:repeat(3,1fr);gap:8px}
  .hero-stats .stat b{font-size:20px}
  .band-grid{grid-template-columns:1fr}
  .band-item{border-left:none;padding:0;text-align:left}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .rail-card:hover,.news-card:hover,.step-item:hover,.btn:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --brand-900:#083F3A;
  --brand-700:#0B6E63;
  --brand-500:#12A594;
  --brand-300:#6BD8C6;
  --accent-500:#FF6B4A;
  --accent-200:#FFD9CF;
  --gold-400:#F5B301;
  --bg:#F6F7F4;
  --bg-card:#FFFFFF;
  --ink:#10201E;
  --ink-2:#4A5C59;
  --line:#E2E7E3;
  --grad-brand:linear-gradient(135deg,#083F3A 0%,#0B6E63 38%,#12A594 68%,#5AD6B8 100%);
  --grad-hot:linear-gradient(120deg,#FF6B4A 0%,#F5B301 100%);
  --grad-veil:linear-gradient(180deg,rgba(8,63,58,0) 45%,rgba(8,63,58,.86) 100%);
  --shadow-1:0 2px 8px rgba(8,63,58,.06);
  --shadow-2:0 12px 32px rgba(8,63,58,.10);
  --shadow-3:0 20px 48px rgba(8,63,58,.16);
  --r-lg:28px;
  --r-md:20px;
  --r-sm:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --sp:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:28px;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 var(--sp)}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(246,247,244,.92);
  transition:background .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(246,247,244,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:68px;display:flex;align-items:center;gap:24px;
  transition:height .22s var(--ease);
}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--brand-900);white-space:nowrap}
.logo-mark{display:inline-flex;width:28px;height:28px}
.logo-mark svg .dot{fill:var(--brand-500)}
.logo-mark svg .wave{fill:none;stroke:var(--accent-500);stroke-width:2;stroke-linecap:round}
.header-cta .btn-primary{white-space:nowrap}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{
  position:relative;padding:8px 14px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--grad-brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav a:hover{color:var(--brand-700)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.active{
  background:var(--grad-brand);color:#fff;padding:8px 16px;
}
.nav a.active::after{display:none}
.header-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:#fff;position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--brand-900);
  border-radius:2px;transform:translateX(-50%);transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle span{top:20px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
.nav-mask{
  position:fixed;inset:0;background:rgba(8,63,58,.42);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),visibility .22s var(--ease);z-index:180;
}
.nav-mask.is-on{opacity:1;visibility:visible}
body.no-scroll{overflow:hidden}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{background:var(--grad-hot);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);filter:brightness(1.06)}
.btn-ghost{background:#fff;color:var(--brand-700);border:1px solid var(--brand-500)}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);background:#F1F8F6}
.btn-light{background:#fff;color:var(--brand-900)}
.btn-light:hover{background:var(--brand-900);color:#fff}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.72)}
.btn-outline-light:hover{background:rgba(255,255,255,.14)}
.btn:active{transform:translateY(0)}

/* ---------- banner ---------- */
.page-banner{
  position:relative;height:200px;overflow:hidden;
  border-radius:0 0 var(--r-lg) var(--r-lg);
  background-image:linear-gradient(90deg,rgba(8,63,58,.88) 0%,rgba(11,110,99,.72) 48%,rgba(18,165,148,.42) 100%),url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;
  display:flex;align-items:flex-end;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1.6px,transparent 1.6px);
  background-size:26px 26px;opacity:.5;
}
.banner-inner{position:relative;z-index:2;padding-bottom:28px;width:100%}
.banner-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;
  background:rgba(255,255,255,.16);color:#fff;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  border:1px solid rgba(255,255,255,.28);
}
.banner-inner h1{
  margin-top:14px;color:#fff;font-size:34px;line-height:1.3;font-weight:700;
  max-width:820px;
}
.banner-note{margin-top:8px;color:rgba(255,255,255,.82);font-size:14px}

/* ---------- breadcrumb ---------- */
.crumb{padding:20px 0 0;font-size:13px;color:var(--ink-2)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li::after{content:"/";color:var(--line)}
.crumb li:last-child::after{display:none}
.crumb a:hover{color:var(--brand-700)}
.crumb .current{color:var(--ink-2)}

/* ---------- intro ---------- */
.intro{padding:32px 0 8px}
.intro-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px;box-shadow:var(--shadow-1);
}
.intro-card h2{font-size:22px;line-height:30px;margin-bottom:16px}
.intro-card p{color:var(--ink-2);font-size:15px;line-height:27px;max-width:860px}
.intro-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;
  background:rgba(107,216,198,.22);color:var(--brand-900);
  border:1px solid rgba(18,165,148,.24);
}

/* ---------- layout ---------- */
.section{padding:56px 0}
.section-head{margin-bottom:28px}
.section-head h2{font-size:30px;line-height:38px}
.section-head p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:720px}
.layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;align-items:start}

.side-nav{
  position:sticky;top:96px;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 18px;box-shadow:var(--shadow-1);
}
.side-nav h3{font-size:14px;font-weight:600;color:var(--ink-2);letter-spacing:.04em;margin-bottom:12px}
.side-nav a{
  position:relative;display:block;padding:10px 12px;border-radius:12px;
  font-size:14px;color:var(--ink-2);
  transition:color .22s var(--ease),background .22s var(--ease);
}
.side-nav a::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;
  background:var(--grad-brand);opacity:0;transition:opacity .22s var(--ease);
}
.side-nav a:hover{color:var(--brand-700);background:#F1F8F6}
.side-nav a.is-current{color:var(--brand-900);font-weight:600;background:#F1F8F6}
.side-nav a.is-current::before{opacity:1}
.side-tip{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;line-height:22px;color:var(--ink-2)}

/* ---------- entry cards ---------- */
.entry-list{display:grid;gap:16px}
.entry-card{
  display:grid;grid-template-columns:236px minmax(0,1fr);gap:24px;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);border-color:rgba(18,165,148,.32)}
.entry-media{border-radius:var(--r-md);overflow:hidden;background:var(--grad-brand)}
.entry-media img{width:100%;height:100%;aspect-ratio:16/11;object-fit:cover}
.entry-body{display:flex;flex-direction:column;gap:10px}
.entry-top{display:flex;align-items:baseline;gap:14px}
.entry-index{
  font-size:32px;line-height:1;font-weight:800;letter-spacing:-.02em;
  background:var(--grad-hot);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;
}
.entry-body h3{font-size:20px;line-height:30px;font-weight:600}
.entry-body p{font-size:14px;line-height:24px;color:var(--ink-2)}
.entry-points{display:grid;gap:6px;margin-top:2px}
.entry-points li{
  position:relative;padding-left:16px;font-size:13px;line-height:22px;color:var(--ink-2);
}
.entry-points li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px}
.tag{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;background:rgba(107,216,198,.22);color:var(--brand-900);
}

/* ---------- flow ---------- */
.flow{
  margin-top:28px;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow-1);
}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.flow-step{position:relative;padding-top:14px;border-top:2px solid var(--line)}
.flow-step::before{
  content:"";position:absolute;top:-7px;left:0;width:12px;height:12px;border-radius:50%;
  background:var(--bg);border:3px solid var(--brand-500);
}
.flow-step .step-num{
  display:block;font-size:13px;font-weight:700;color:var(--brand-700);letter-spacing:.06em;margin-bottom:6px;
}
.flow-step h4{font-size:16px;line-height:26px;margin-bottom:6px}
.flow-step p{font-size:13px;line-height:22px;color:var(--ink-2)}

/* ---------- table ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--bg-card);
  box-shadow:var(--shadow-1);
}
.table-wrap table{font-size:14px}
.table-wrap th{
  background:var(--brand-900);color:#fff;text-align:left;font-weight:600;
  padding:14px 18px;font-size:14px;white-space:nowrap;
}
.table-wrap td{padding:14px 18px;border-top:1px solid var(--line);color:var(--ink-2);line-height:24px;vertical-align:top}
.table-wrap tbody tr:nth-child(even){background:#F4F8F6}
.table-wrap td strong{color:var(--ink);font-weight:600}

/* ---------- scenario cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.scene-card .scene-idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:12px;margin-bottom:14px;
  background:var(--grad-brand);color:#fff;font-size:14px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.scene-card h3{font-size:18px;line-height:28px;margin-bottom:8px}
.scene-card p{font-size:14px;line-height:24px;color:var(--ink-2)}

/* ---------- stats ---------- */
.stats{
  background:var(--brand-900);border-radius:var(--r-lg);padding:32px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:8px;
}
.stat{padding:0 24px;border-left:1px solid rgba(255,255,255,.12)}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{font-size:32px;font-weight:800;color:var(--gold-400);font-variant-numeric:tabular-nums;line-height:1.2}
.stat-label{font-size:13px;color:rgba(255,255,255,.72);margin-top:6px}

/* ---------- faq ---------- */
.faq{margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand-700)}
.faq-icon{
  position:relative;flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  background:rgba(18,165,148,.12);display:grid;place-items:center;
  transition:transform .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-700);border-radius:2px}
.faq-icon::before{width:12px;height:2px}
.faq-icon::after{width:2px;height:12px;transition:opacity .22s var(--ease)}
.faq-item.is-open .faq-icon{transform:rotate(90deg)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .22s var(--ease),opacity .22s var(--ease)}
.faq-item.is-open .faq-a{opacity:1}
.faq-a p{padding:0 44px 20px 0;font-size:15px;line-height:26px;color:var(--ink-2)}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;margin:56px 0 72px;
  background:var(--grad-brand);border-radius:var(--r-lg);
  padding:56px 40px;text-align:center;color:#fff;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:420px;height:420px;
  border-radius:50%;border:60px solid rgba(255,255,255,.08);
}
.cta-band h2{font-size:30px;line-height:38px;position:relative;z-index:2}
.cta-band p{margin-top:14px;font-size:15px;color:rgba(255,255,255,.86);position:relative;z-index:2}
.cta-actions{
  position:relative;z-index:2;margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;justify-content:center;
}
.cta-foot{
  position:relative;z-index:2;margin-top:22px;font-size:12px;color:rgba(255,255,255,.72);
}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:#fff;padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand .logo{color:#fff}
.footer-brand .logo-mark svg .dot{fill:var(--brand-300)}
.footer-brand .logo-mark svg .wave{stroke:var(--gold-400)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:24px;color:rgba(255,255,255,.72);max-width:340px}
.socials{display:flex;gap:10px;margin-top:18px}
.socials a{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.10);color:#fff;font-size:13px;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.socials a:hover{background:rgba(255,255,255,.22);transform:translateY(-2px)}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col li{margin-bottom:10px;font-size:14px;color:rgba(255,255,255,.72)}
.footer-col a{color:rgba(255,255,255,.72);transition:color .22s var(--ease)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.72);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .banner-inner h1{font-size:30px}
}
@media (max-width:1023px){
  .nav{
    position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;
    background:#fff;flex-direction:column;align-items:stretch;gap:6px;
    padding:88px 24px 32px;margin:0;z-index:200;
    transform:translateX(102%);transition:transform .22s var(--ease);
    box-shadow:var(--shadow-3);overflow-y:auto;
  }
  .nav.is-open{transform:translateX(0)}
  .nav a{padding:14px 16px;font-size:16px;border-radius:14px}
  .nav a::after{display:none}
  .nav a.active{padding:14px 16px;border-radius:14px}
  .nav-toggle{display:block;z-index:210}
  .layout{grid-template-columns:1fr;gap:24px}
  .side-nav{position:static;display:grid;grid-template-columns:repeat(2,1fr);gap:6px}
  .side-nav h3{grid-column:1/-1}
  .side-tip{grid-column:1/-1}
  .flow-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  :root{--sp:16px}
  .page-banner{height:170px}
  .banner-inner h1{font-size:24px;line-height:34px}
  .banner-note{font-size:13px}
  .container{padding:0 16px}
  .header-cta .btn{display:none}
  .section{padding:40px 0}
  .section-head h2{font-size:22px;line-height:32px}
  .intro-card{padding:22px}
  .intro-card h2{font-size:18px}
  .entry-card{grid-template-columns:1fr;padding:16px;gap:16px}
  .entry-media img{aspect-ratio:16/9}
  .entry-body h3{font-size:17px;line-height:26px}
  .entry-index{font-size:26px}
  .flow-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr);gap:20px;padding:24px}
  .stat{border-left:0;padding:0}
  .stat:nth-child(even){padding-left:16px;border-left:1px solid rgba(255,255,255,.12)}
  .faq-q{font-size:16px;padding:16px 0}
  .faq-a p{padding-right:0}
  .cta-band{padding:32px 22px;margin:40px 0 48px;border-radius:var(--r-md)}
  .cta-band h2{font-size:22px;line-height:32px}
  .cta-actions .btn{width:100%}
  .table-wrap{border-radius:var(--r-sm);overflow-x:auto}
  .table-wrap table{min-width:560px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:48px 0 24px}
}
@media (max-width:480px){
  .side-nav{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .stat:nth-child(even){padding-left:0;border-left:0}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --brand-900:#083F3A;--brand-700:#0B6E63;--brand-500:#12A594;--brand-300:#6BD8C6;
  --accent-500:#FF6B4A;--accent-200:#FFD9CF;--gold-400:#F5B301;
  --bg:#F6F7F4;--bg-card:#FFFFFF;--ink:#10201E;--ink-2:#4A5C59;--line:#E2E7E3;
  --grad-brand:linear-gradient(135deg,#083F3A 0%,#0B6E63 38%,#12A594 68%,#5AD6B8 100%);
  --grad-hot:linear-gradient(120deg,#FF6B4A 0%,#F5B301 100%);
  --grad-veil:linear-gradient(180deg,rgba(8,63,58,0) 45%,rgba(8,63,58,.86) 100%);
  --shadow-1:0 2px 8px rgba(8,63,58,.06);
  --shadow-2:0 12px 32px rgba(8,63,58,.10);
  --shadow-3:0 20px 48px rgba(8,63,58,.16);
  --r-lg:28px;--r-md:20px;--r-sm:14px;--r-pill:999px;
  --wrap:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::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:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:28px;-webkit-font-smoothing:antialiased}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}
section{scroll-margin-top:96px}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-pill);font-size:15px;font-weight:600;letter-spacing:.01em;transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease)}
.btn-primary{background:var(--grad-hot);color:#fff;box-shadow:0 10px 24px rgba(255,107,74,.28)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06)}
.btn-outline{background:#fff;color:var(--brand-700);border:1px solid var(--brand-500)}
.btn-outline:hover{background:#EFF8F6;transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--brand-900)}
.btn-white:hover{background:var(--brand-900);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.7)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn:active{transform:translateY(0) scale(.99)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(246,247,244,.88);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .22s var(--ease)}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;transition:height .22s var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--brand-900);letter-spacing:-.01em;white-space:nowrap}
.logo-mark{display:inline-flex}
.logo-mark .dot{fill:var(--brand-500)}
.logo-mark .wave{fill:none;stroke:var(--brand-700);stroke-width:2;stroke-linecap:round}
.nav{display:flex;align-items:center;gap:4px}
.nav a{position:relative;padding:9px 14px;font-size:15px;font-weight:500;color:var(--ink-2);border-radius:var(--r-pill);transition:color .22s var(--ease),background .22s var(--ease)}
.nav a::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--grad-brand);border-radius:2px;transform:scaleX(0);transform-origin:left center;transition:transform .22s var(--ease)}
.nav a:hover{color:var(--brand-700)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.active{background:var(--grad-brand);color:#fff}
.nav a.active::after{display:none}
.header-cta{display:flex;align-items:center;gap:12px}
.header-cta .btn{height:42px;padding:0 20px;font-size:14px}
.nav-toggle{display:none;position:relative;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:#fff}
.nav-toggle span{position:absolute;left:11px;right:11px;top:50%;height:2px;background:var(--brand-700);border-radius:2px;transform:translateY(-50%);transition:background .22s var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;right:0;height:2px;background:var(--brand-700);border-radius:2px;transition:transform .22s var(--ease)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

.drawer{position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:#fff;z-index:80;padding:86px 24px 32px;overflow-y:auto;transform:translateX(102%);transition:transform .24s var(--ease);box-shadow:var(--shadow-3)}
.drawer.open{transform:translateX(0)}
.drawer h4{font-size:13px;font-weight:600;color:var(--ink-2);letter-spacing:.08em;margin-bottom:12px}
.drawer nav{display:flex;flex-direction:column;gap:6px;margin-bottom:28px}
.drawer nav a{padding:12px 14px;border-radius:var(--r-sm);font-size:15px;font-weight:500;color:var(--ink);background:#F4F8F6}
.drawer nav a.active{background:var(--grad-brand);color:#fff}
.drawer .btn{width:100%}
.drawer-meta{margin-top:20px;font-size:13px;line-height:22px;color:var(--ink-2)}
.overlay{position:fixed;inset:0;background:rgba(8,63,58,.45);z-index:70;opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease)}
.overlay.open{opacity:1;visibility:visible}

/* ============ article hero ============ */
.article-hero{position:relative;overflow:hidden;padding:32px 0 56px;background:linear-gradient(180deg,#F1F6F3 0%,rgba(246,247,244,0) 100%)}
.article-hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(18,165,148,.16) 1.5px,transparent 1.5px);background-size:22px 22px;opacity:.65;pointer-events:none}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;line-height:20px;color:var(--ink-2);margin-bottom:26px}
.breadcrumb a{color:var(--brand-700)}
.breadcrumb a:hover{text-decoration:underline;text-underline-offset:4px}
.breadcrumb .sep{color:#A9B6B2}
.breadcrumb .current{color:var(--ink-2)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.75fr);gap:44px;align-items:center}
.badge-soft{display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);background:var(--accent-200);color:#8A2E17;font-size:13px;font-weight:600;letter-spacing:.02em}
.hero-grid h1{margin:16px 0 18px;font-size:40px;line-height:48px;font-weight:700;letter-spacing:-.01em;color:var(--ink);max-width:720px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;font-size:13px;line-height:20px;color:var(--ink-2)}
.badge-brand{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);background:var(--grad-brand);color:#fff;font-size:12px;font-weight:600}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-dot{width:5px;height:5px;border-radius:50%;background:var(--brand-300);display:inline-block}
.hero-media{position:relative}
.hero-media .frame{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-3);aspect-ratio:16/11;background:var(--grad-brand)}
.hero-media .frame img{width:100%;height:100%;object-fit:cover}
.hero-media .frame::after{content:"";position:absolute;inset:0;background:var(--grad-veil);opacity:.72}
.hero-media .caption{position:absolute;left:22px;right:22px;bottom:20px;color:#fff;z-index:2}
.hero-media .caption strong{display:block;font-size:17px;font-weight:600;line-height:26px}
.hero-media .caption span{font-size:13px;line-height:20px;color:rgba(255,255,255,.78)}

/* ============ article layout ============ */
.article-section{padding:8px 0 72px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start}
.article-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-1);padding:44px 44px 36px}
.article-body{max-width:720px;margin:0 auto;font-size:16px;line-height:30px;color:var(--ink-2)}
.article-body h2{position:relative;margin:36px 0 16px;padding-left:14px;font-size:24px;line-height:34px;font-weight:700;color:var(--ink);letter-spacing:-.01em;scroll-margin-top:96px}
.article-body h2::before{content:"";position:absolute;left:0;top:7px;width:3px;height:20px;border-radius:2px;background:var(--grad-brand)}
.article-body h3{margin:28px 0 12px;font-size:19px;line-height:30px;font-weight:600;color:var(--ink)}
.article-body p{margin:0 0 1.1em}
.article-body a{color:var(--brand-700);border-bottom:1px solid rgba(11,110,99,.32)}
.article-body a:hover{border-bottom-color:var(--brand-700)}
.article-body strong{color:var(--ink);font-weight:600}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:22px}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-body li{margin:6px 0;line-height:1.9}
.article-body img{width:100%;border-radius:var(--r-md);margin:24px auto;box-shadow:var(--shadow-1)}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:10px;font-size:13px;line-height:20px;color:var(--ink-2);text-align:center}
.article-body blockquote{margin:24px 0;padding:16px 22px;background:#F0F6F4;border-left:4px solid var(--brand-500);border-radius:0 16px 16px 0;color:var(--ink-2)}
.article-body table{width:100%;border-collapse:separate;border-spacing:0;margin:24px 0;border-radius:var(--r-sm);overflow:hidden;box-shadow:0 0 0 1px var(--line);font-size:15px}
.article-body th{background:var(--brand-900);color:#fff;text-align:left;padding:12px 16px;font-weight:600}
.article-body td{padding:12px 16px;border-top:1px solid var(--line);line-height:26px}
.article-body tbody tr:nth-child(even) td{background:#F3F7F5}
.article-body hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.tag-list{max-width:720px;margin:36px auto 0;display:flex;flex-wrap:wrap;gap:10px;padding-top:24px;border-top:1px solid var(--line)}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);background:rgba(107,216,198,.22);color:#0A5C52;font-size:13px;font-weight:500}
.article-actions{max-width:720px;margin:24px auto 0;display:flex;flex-wrap:wrap;gap:12px}

.empty-state{max-width:720px;margin:0 auto;text-align:center;padding:36px 0 28px}
.empty-mark{width:64px;height:64px;margin:0 auto 18px;border-radius:18px;background:var(--grad-brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;letter-spacing:.04em}
.empty-state h2{font-size:22px;line-height:30px;color:var(--ink);margin-bottom:10px}
.empty-state p{font-size:15px;line-height:26px;color:var(--ink-2);margin-bottom:22px}

/* ============ sidebar ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-1);padding:22px}
.side-card h3{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-500)}
#tocList{display:flex;flex-direction:column;gap:2px}
.toc-link{display:block;padding:8px 10px 8px 12px;font-size:14px;line-height:22px;color:var(--ink-2);border-left:2px solid transparent;border-radius:0 10px 10px 0;transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease)}
.toc-link:hover{color:var(--brand-700);background:#F2F8F6;border-left-color:var(--brand-500)}
.side-list{display:flex;flex-direction:column;gap:12px}
.side-list a{display:flex;gap:12px;align-items:center;padding:8px;border-radius:var(--r-sm);transition:background .2s var(--ease),transform .2s var(--ease)}
.side-list a:hover{background:#F2F8F6;transform:translateX(2px)}
.side-list img{width:64px;height:48px;border-radius:12px;object-fit:cover;flex:none}
.side-list strong{display:block;font-size:14px;line-height:22px;font-weight:600;color:var(--ink)}
.side-list span{font-size:12px;line-height:20px;color:var(--ink-2)}
.side-tip{background:linear-gradient(140deg,#0B6E63 0%,#12A594 100%);border:0;color:#fff}
.side-tip h3{color:#fff}
.side-tip h3::before{background:var(--gold-400)}
.side-tip p{font-size:13px;line-height:22px;color:rgba(255,255,255,.86)}

/* ============ data strip ============ */
.data-strip{margin-bottom:72px}
.data-inner{background:var(--brand-900);border-radius:24px;padding:32px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;overflow:hidden}
.data-inner::after{content:"";position:absolute;right:-60px;bottom:-80px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(107,216,198,.18) 0%,rgba(107,216,198,0) 70%)}
.data-item{position:relative;padding-left:20px;border-left:1px solid rgba(255,255,255,.12)}
.data-item:first-child{border-left:0;padding-left:0}
.data-item b{display:block;font-size:32px;line-height:1.1;font-weight:800;color:var(--gold-400);font-variant-numeric:tabular-nums}
.data-item strong{display:block;margin-top:10px;font-size:15px;font-weight:600;color:#fff}
.data-item span{display:block;margin-top:6px;font-size:13px;line-height:20px;color:rgba(255,255,255,.72)}

/* ============ related ============ */
.related{padding:0 0 72px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2{font-size:30px;line-height:38px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.section-head p{margin-top:8px;font-size:14px;line-height:22px;color:var(--ink-2)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--accent-500);white-space:nowrap}
.text-link i{font-style:normal;transition:transform .2s var(--ease)}
.text-link:hover i{transform:translateX(3px)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-1);display:flex;flex-direction:column;transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.post-thumb{position:relative;aspect-ratio:16/9;background:var(--grad-brand);overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-thumb .badge-brand{position:absolute;left:14px;top:14px}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.post-body h3{font-size:18px;line-height:28px;font-weight:600;color:var(--ink);transition:color .2s var(--ease)}
.post-card:hover .post-body h3{color:var(--brand-700)}
.post-body p{font-size:14px;line-height:22px;color:var(--ink-2)}
.post-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-2);border-top:1px dashed var(--line)}

/* ============ CTA ============ */
.cta-band{padding:0 0 72px}
.cta-inner{position:relative;overflow:hidden;background:var(--grad-brand);border-radius:var(--r-lg);padding:56px 48px;text-align:center;color:#fff}
.cta-inner::after{content:"";position:absolute;right:-80px;bottom:-120px;width:340px;height:340px;border-radius:50%;border:40px solid rgba(255,255,255,.06)}
.cta-inner h2{font-size:30px;line-height:38px;font-weight:700;letter-spacing:-.01em}
.cta-inner p{margin:14px auto 26px;max-width:560px;font-size:15px;line-height:26px;color:rgba(255,255,255,.86)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;position:relative;z-index:1}
.cta-note{margin-top:20px;font-size:12px;line-height:20px;color:rgba(255,255,255,.72)}

/* ============ footer ============ */
.site-footer{background:var(--brand-900);color:#fff;padding:64px 0 28px;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo-mark .dot{fill:var(--brand-300)}
.footer-brand .logo-mark .wave{stroke:#fff}
.footer-brand p{font-size:14px;line-height:24px;color:rgba(255,255,255,.72);max-width:340px}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;background:rgba(255,255,255,.1);color:#fff;transition:background .2s var(--ease),transform .2s var(--ease)}
.socials a:hover{background:var(--brand-500);transform:translateY(-2px)}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col span{font-size:14px;line-height:22px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;line-height:20px;color:rgba(255,255,255,.62)}

/* ============ responsive ============ */
@media (max-width:1023px){
  .nav{display:none}
  .nav-toggle{display:block}
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-media .frame{aspect-ratio:16/9}
  .article-layout{grid-template-columns:1fr;gap:24px}
  .article-side{position:static;top:auto}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .data-inner{grid-template-columns:1fr 1fr;gap:20px}
  .data-item:nth-child(3){border-left:0;padding-left:0}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .header-inner{height:64px}
  .header-cta .btn{display:none}
  .article-hero{padding:22px 0 40px}
  .hero-grid h1{font-size:28px;line-height:36px}
  .article-card{padding:24px 18px 22px;border-radius:var(--r-md)}
  .article-body{font-size:16px;line-height:28px}
  .article-body h2{font-size:20px;line-height:30px;margin-top:30px}
  .article-body h3{font-size:17px}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:10px 12px}
  .article-actions .btn{flex:1 1 auto}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .section-head h2{font-size:22px;line-height:30px}
  .card-grid{grid-template-columns:1fr}
  .related,.cta-band,.article-section{padding-bottom:48px}
  .data-strip{margin-bottom:48px}
  .data-inner{grid-template-columns:1fr;padding:24px;gap:18px}
  .data-item{border-left:0;padding-left:0;border-top:1px solid rgba(255,255,255,.12);padding-top:18px}
  .data-item:first-child{border-top:0;padding-top:0}
  .cta-inner{padding:32px 22px;border-radius:var(--r-md)}
  .cta-inner h2{font-size:22px;line-height:30px}
  .cta-actions .btn{width:100%}
  .site-footer{padding:48px 0 24px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:480px){
  .hero-grid h1{font-size:24px;line-height:32px}
  .badge-soft{font-size:12px}
  .meta-row{font-size:12px}
  .side-list img{width:56px;height:42px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .post-card:hover,.btn:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --brand-900:#083F3A;
  --brand-700:#0B6E63;
  --brand-500:#12A594;
  --brand-300:#6BD8C6;
  --accent-500:#FF6B4A;
  --accent-200:#FFD9CF;
  --gold-400:#F5B301;
  --bg:#F6F7F4;
  --bg-card:#FFFFFF;
  --ink:#10201E;
  --ink-2:#4A5C59;
  --line:#E2E7E3;
  --grad-brand:linear-gradient(135deg,#083F3A 0%,#0B6E63 38%,#12A594 68%,#5AD6B8 100%);
  --grad-hot:linear-gradient(120deg,#FF6B4A 0%,#F5B301 100%);
  --grad-veil:linear-gradient(180deg,rgba(8,63,58,0) 45%,rgba(8,63,58,.86) 100%);
  --shadow-1:0 2px 8px rgba(8,63,58,.06);
  --shadow-2:0 12px 32px rgba(8,63,58,.10);
  --shadow-3:0 20px 48px rgba(8,63,58,.16);
  --r-lg:28px;
  --r-md:20px;
  --r-v:24px;
  --r-input:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:28px;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(246,247,244,.92);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.scrolled{
  background:rgba(246,247,244,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;transition:height .22s var(--ease)}
.site-header.scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.logo-mark{display:inline-flex;width:28px;height:28px}
.logo-mark svg{width:28px;height:28px}
.logo-mark .dot{fill:var(--brand-500)}
.logo-mark .wave{fill:none;stroke:var(--brand-700);stroke-width:1.6;stroke-linecap:round}
.nav{display:flex;align-items:center;gap:6px}
.nav a{
  position:relative;
  padding:8px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  border-radius:999px;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:var(--grad-brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav a:hover{color:var(--brand-700)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.active{background:var(--grad-brand);color:#fff;padding:8px 16px;box-shadow:var(--shadow-1)}
.nav a.active::after{display:none}
.header-cta{display:flex;align-items:center;gap:12px}
.nav-extra{display:none}
.nav-mask{position:fixed;inset:0;background:rgba(8,63,58,.42);opacity:0;pointer-events:none;transition:opacity .22s var(--ease);z-index:110}
body.nav-open .nav-mask{opacity:1;pointer-events:auto}
body.nav-open{overflow:hidden}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),filter .22s var(--ease),color .22s var(--ease);
}
.btn-primary{background:var(--grad-hot);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);filter:brightness(1.06)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;border:1px solid var(--brand-500);color:var(--brand-700)}
.btn-outline:hover{background:rgba(18,165,148,.08);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--brand-900)}
.btn-light:hover{background:var(--brand-900);color:#fff;transform:translateY(-2px)}
.btn-ghost-light{border:1px solid rgba(255,255,255,.7);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* 页头 Banner */
.cat-banner{
  position:relative;
  margin-top:24px;
  min-height:200px;
  border-radius:var(--r-lg);
  padding:36px;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  gap:14px;
  overflow:hidden;
  background-image:
    radial-gradient(rgba(255,255,255,.18) 1.5px,transparent 1.6px),
    linear-gradient(120deg,rgba(8,63,58,.90) 0%,rgba(11,110,99,.80) 45%,rgba(18,165,148,.72) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:22px 22px,cover,cover;
  background-position:0 0,center,center;
}
.banner-tag{
  align-self:flex-start;
  background:var(--accent-200);color:#7A2A17;
  font-size:12px;font-weight:700;letter-spacing:.06em;
  padding:5px 12px;border-radius:999px;
}
.cat-banner h1{color:#fff;font-size:40px;font-weight:700;letter-spacing:-.01em;max-width:820px}
.cat-banner .banner-note{color:rgba(255,255,255,.78);font-size:14px;line-height:22px;max-width:720px}

/* 面包屑 */
.crumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--ink-2);padding:20px 0 0}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand-700)}
.crumb .sep{color:#B7C2BD}
.crumb .current{color:var(--ink)}

/* 引导段 */
.lead-sec{padding:32px 0 8px}
.lead-sec p{max-width:820px;color:var(--ink-2);font-size:16px;line-height:30px}
.lead-highlights{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(107,216,198,.22);color:var(--brand-700);
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;
}
.chip.hot{background:var(--accent-200);color:#8A3018}

/* 板块通用 */
.section{padding:64px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:24px}
.section-title{font-size:30px;font-weight:700}
.section-sub{color:var(--ink-2);font-size:15px;line-height:24px;margin-top:10px;max-width:640px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--accent-500);white-space:nowrap;transition:color .22s var(--ease)}
.link-more .arrow{transition:transform .22s var(--ease)}
.link-more:hover{color:var(--brand-700)}
.link-more:hover .arrow{transform:translateX(3px)}

/* 竖屏卡网格 */
.vgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.vcard{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-v);
  padding:14px 14px 20px;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.vcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.vcard-media{position:relative;aspect-ratio:3/4;border-radius:18px;overflow:hidden;background:var(--grad-brand)}
.vcard-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.vcard:hover .vcard-media img{transform:scale(1.04)}
.vcard-media::after{content:"";position:absolute;inset:0;background:var(--grad-veil)}
.vcard-tag{
  position:absolute;top:12px;right:12px;z-index:2;
  background:rgba(255,255,255,.92);color:var(--brand-900);
  font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;
}
.vcard-num{
  position:absolute;top:12px;left:12px;z-index:2;
  width:34px;height:34px;border-radius:50%;
  background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.4);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  display:grid;place-items:center;color:#fff;font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.vcard-play{
  position:absolute;left:50%;top:52%;z-index:2;
  width:54px;height:54px;border-radius:50%;
  background:rgba(255,255,255,.20);border:1px solid rgba(255,255,255,.55);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  display:grid;place-items:center;color:#fff;font-size:18px;
  opacity:0;transform:translate(-50%,-50%) scale(.7);
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.vcard:hover .vcard-play{opacity:1;transform:translate(-50%,-50%) scale(1)}
.vcard h3{font-size:19px;font-weight:600;margin:18px 0 8px;padding:0 4px}
.vcard p{font-size:14px;line-height:22px;color:var(--ink-2);padding:0 4px}
.vcard .vcard-note{margin-top:6px;color:#7A8B87}

/* 数据徽章条 */
.databar{
  position:relative;overflow:hidden;
  background:var(--brand-900);border-radius:var(--r-v);
  padding:32px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;
}
.databar::after{
  content:"";position:absolute;right:-70px;bottom:-90px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(90,214,184,.20),transparent 70%);
}
.data-item{position:relative;z-index:1;padding:0 24px;border-left:1px solid rgba(255,255,255,.12)}
.data-item:first-child{border-left:0;padding-left:0}
.data-num{font-size:32px;font-weight:800;color:var(--gold-400);line-height:1.2;font-variant-numeric:tabular-nums}
.data-label{font-size:13px;line-height:20px;color:rgba(255,255,255,.72);margin-top:8px}

/* 设置顺序 */
.step-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step-item{
  position:relative;background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r-md);padding:24px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.step-num{
  font-size:40px;font-weight:800;line-height:1;letter-spacing:-.02em;
  background:var(--grad-hot);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;
}
.step-item h3{font-size:18px;font-weight:600;margin:14px 0 8px}
.step-item p{font-size:14px;line-height:22px;color:var(--ink-2)}

/* 使用场景 */
.scene-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.scene-item{
  position:relative;overflow:hidden;display:flex;gap:16px;align-items:flex-start;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.scene-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad-brand);
  transform:scaleY(0);transform-origin:top;transition:transform .22s var(--ease);
}
.scene-item:hover::before{transform:scaleY(1)}
.scene-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.scene-idx{font-size:15px;font-weight:800;color:var(--brand-500);min-width:30px;font-variant-numeric:tabular-nums;padding-top:2px}
.scene-item h3{font-size:17px;font-weight:600;margin-bottom:6px}
.scene-item p{font-size:14px;line-height:22px;color:var(--ink-2)}

/* FAQ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 4px;font-size:17px;font-weight:600;text-align:left;color:var(--ink);
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand-700)}
.faq-icon{
  position:relative;flex:none;width:24px;height:24px;border-radius:50%;
  background:rgba(18,165,148,.12);
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-700);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.faq-item.open .faq-icon{background:var(--brand-500)}
.faq-item.open .faq-icon::before{background:#fff}
.faq-item.open .faq-icon::after{opacity:0;transform:translate(-50%,-50%) scaleY(0)}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .22s var(--ease),opacity .22s var(--ease)}
.faq-item.open .faq-a{opacity:1}
.faq-a p{padding:0 44px 22px 4px;font-size:15px;line-height:26px;color:var(--ink-2)}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;margin-top:72px;
  background:var(--grad-brand);border-radius:var(--r-lg);
  padding:56px;text-align:center;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:360px;height:360px;border-radius:50%;
  border:36px solid rgba(255,255,255,.07);
}
.cta-band h2{color:#fff;font-size:30px;font-weight:700;position:relative;z-index:1}
.cta-band .cta-sub{color:rgba(255,255,255,.82);font-size:15px;margin-top:12px;position:relative;z-index:1}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px;position:relative;z-index:1}
.cta-foot{color:rgba(255,255,255,.72);font-size:12px;line-height:20px;margin-top:22px;position:relative;z-index:1}

/* 页脚 */
.site-footer{background:var(--brand-900);color:#fff;margin-top:80px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#fff;margin-bottom:16px;font-size:18px}
.footer-brand .logo .dot{fill:var(--brand-300)}
.footer-brand .logo .wave{stroke:var(--brand-300)}
.footer-brand p{color:rgba(255,255,255,.72);font-size:14px;line-height:24px;max-width:340px}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{
  width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.10);
  display:grid;place-items:center;font-size:13px;color:#fff;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.socials a:hover{background:var(--brand-500);transform:translateY(-2px)}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:18px;color:#fff}
.footer-col li{margin-bottom:10px}
.footer-col a,.footer-col span{color:rgba(255,255,255,.72);font-size:14px;line-height:22px;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13px;color:rgba(255,255,255,.6);
}

@media (max-width:1279px){
  .vgrid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
  .step-list{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
}
@media (max-width:1023px){
  .nav{
    position:fixed;top:0;right:0;z-index:120;
    width:84vw;max-width:360px;height:100vh;
    display:flex;flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;padding:88px 20px 28px;
    box-shadow:var(--shadow-3);overflow-y:auto;
    transform:translateX(103%);
    transition:transform .24s var(--ease);
  }
  .nav.open{transform:translateX(0)}
  .nav a{padding:14px 14px;font-size:16px;border-radius:14px}
  .nav a::after{display:none}
  .nav a.active{background:var(--grad-brand);color:#fff}
  .nav-extra{display:block;margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}
  .nav-extra .btn{width:100%;margin-bottom:12px}
  .nav-extra .nav-tip{font-size:13px;line-height:22px;color:var(--ink-2)}
  .header-cta .btn-primary{display:none}
  .nav-toggle{
    display:inline-flex;width:44px;height:44px;border-radius:14px;
    align-items:center;justify-content:center;background:rgba(18,165,148,.10);
  }
  .vgrid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .cat-banner h1{font-size:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .cat-banner{padding:26px;min-height:170px;border-radius:24px}
  .cat-banner h1{font-size:28px}
  .cat-banner .banner-note{font-size:13px;line-height:21px}
  .lead-sec{padding:26px 0 4px}
  .lead-sec p{font-size:15px;line-height:27px}
  .section{padding:48px 0 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-title{font-size:22px}
  .vgrid{grid-template-columns:1fr;gap:20px}
  .vcard{max-width:340px;width:100%;margin:0 auto}
  .vcard h3{font-size:18px}
  .databar{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 0;padding:26px 20px}
  .data-item{padding:0 16px}
  .data-item:nth-child(3){border-left:0;padding-left:0}
  .data-num{font-size:26px}
  .step-list{grid-template-columns:1fr;gap:16px}
  .step-num{font-size:32px}
  .scene-list{grid-template-columns:1fr}
  .faq-q{font-size:16px;padding:18px 2px}
  .faq-a p{padding:0 30px 20px 2px}
  .cta-band{padding:32px 22px;margin-top:48px}
  .cta-band h2{font-size:22px}
  .cta-actions .btn{width:100%}
  .site-footer{margin-top:56px;padding:48px 0 24px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-bottom{flex-direction:column;gap:8px;font-size:12px}
}
@media (max-width:480px){
  .cat-banner h1{font-size:26px}
  .databar{grid-template-columns:1fr;gap:22px}
  .data-item{padding:0;border-left:0}
  .footer-grid{grid-template-columns:1fr;gap:26px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --brand-900:#083F3A;
  --brand-700:#0B6E63;
  --brand-500:#12A594;
  --brand-300:#6BD8C6;
  --accent-500:#FF6B4A;
  --accent-200:#FFD9CF;
  --gold-400:#F5B301;
  --bg:#F6F7F4;
  --bg-card:#FFFFFF;
  --ink:#10201E;
  --ink-2:#4A5C59;
  --line:#E2E7E3;
  --grad-brand:linear-gradient(135deg,#083F3A 0%,#0B6E63 38%,#12A594 68%,#5AD6B8 100%);
  --grad-hot:linear-gradient(120deg,#FF6B4A 0%,#F5B301 100%);
  --grad-veil:linear-gradient(180deg,rgba(8,63,58,0) 45%,rgba(8,63,58,.86) 100%);
  --shadow-1:0 2px 8px rgba(8,63,58,.06);
  --shadow-2:0 12px 32px rgba(8,63,58,.10);
  --shadow-3:0 20px 48px rgba(8,63,58,.16);
  --r-lg:28px;
  --r-md:20px;
  --r-sm:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:220ms cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei","Inter",system-ui,sans-serif;
  font-size:16px;
  line-height:28px;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand-700);text-decoration:none}
a:hover{color:var(--brand-900)}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2{font-size:30px;line-height:38px;font-weight:700;letter-spacing:-.01em}
.section-head p{font-size:14px;line-height:22px;color:var(--ink-2);max-width:620px;margin-top:10px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-700);background:rgba(107,216,198,.22);padding:5px 12px;border-radius:999px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,247,244,.94);
  border-bottom:1px solid transparent;
  transition:background var(--t),box-shadow var(--t),border-color var(--t);
}
.site-header.is-shrink{
  background:rgba(246,247,244,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.header-inner{display:flex;align-items:center;gap:16px;height:68px;transition:height var(--t)}
.site-header.is-shrink .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;flex-shrink:0}
.logo:hover{color:var(--brand-700)}
.logo-mark{display:inline-flex;width:28px;height:28px}
.logo-mark svg{display:block}
.logo-mark .dot{fill:var(--brand-500)}
.logo-mark .wave{fill:none;stroke:var(--accent-500);stroke-width:2;stroke-linecap:round}
.nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
  padding:8px 12px;border-radius:999px;white-space:nowrap;
  transition:color var(--t),background var(--t);
}
.nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--grad-hot);transform:scaleX(0);transform-origin:left;
  transition:transform var(--t);border-radius:2px;
}
.nav a:hover{color:var(--brand-700)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.active{background:var(--grad-brand);color:#fff}
.nav a.active::after{display:none}
.header-cta{margin-left:8px;display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:999px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
  position:relative;z-index:80;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform var(--t),background var(--t);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.site-header.is-open .nav-toggle span{background:transparent}
.site-header.is-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg)}
.site-header.is-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg)}
.site-header.is-open::before{
  content:"";position:fixed;inset:0;background:rgba(8,63,58,.42);z-index:65;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),filter var(--t);
}
.btn-primary{background:var(--grad-hot);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(.92);color:#fff;box-shadow:var(--shadow-2)}
.btn-ghost{background:#fff;border-color:var(--brand-500);color:var(--brand-700)}
.btn-ghost:hover{background:rgba(18,165,148,.08);transform:translateY(-2px);color:var(--brand-900)}
.btn-white{background:#fff;color:var(--brand-900)}
.btn-white:hover{background:var(--brand-900);color:#fff}
.btn-outline-w{background:transparent;border-color:rgba(255,255,255,.72);color:#fff}
.btn-outline-w:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------- page banner ---------- */
.page-banner{position:relative;overflow:hidden;color:#fff;padding:56px 0 52px;background:var(--brand-900)}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(135deg,rgba(8,63,58,.95) 0%,rgba(11,110,99,.88) 46%,rgba(18,165,148,.74) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.18) 1.5px,transparent 1.6px);
  background-size:22px 22px;opacity:.6;
}
.banner-inner{position:relative;z-index:2;max-width:840px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;line-height:20px;color:rgba(255,255,255,.72);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,.86)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.breadcrumb span.sep{opacity:.6}
.breadcrumb .current{color:rgba(255,255,255,.72)}
.page-banner h1{font-size:40px;line-height:48px;font-weight:700;letter-spacing:-.01em;margin:14px 0 20px;max-width:760px}
.banner-badge{display:inline-flex;align-items:center;gap:8px;background:var(--accent-200);color:#7A2A16;font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px}
.banner-lead{font-size:16px;line-height:30px;color:rgba(255,255,255,.86);max-width:720px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{display:inline-flex;align-items:center;padding:7px 15px;border-radius:999px;font-size:13px;font-weight:500;color:#fff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2)}
.tag.on{background:var(--accent-200);color:#7A2A16;border-color:transparent;font-weight:600}

/* ---------- timeline ---------- */
.timeline-wrap{margin-top:8px}
.timeline{position:relative;padding:12px 0 0}
.timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;margin-left:-1px;
  background:var(--grad-brand);border-radius:2px;opacity:.9;
}
.tl-item{position:relative;width:50%;padding-right:48px;margin-bottom:28px}
.tl-item:nth-child(even){margin-left:50%;padding-right:0;padding-left:48px}
.tl-item::after{
  content:"";position:absolute;top:28px;right:-9px;width:18px;height:18px;
  border-radius:50%;background:var(--brand-500);border:3px solid var(--bg);
  box-shadow:0 0 0 1px rgba(11,110,99,.2);
}
.tl-item:nth-child(even)::after{right:auto;left:-9px}
.tl-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);border-color:rgba(107,216,198,.7)}
.tl-time{
  display:inline-flex;align-items:center;gap:8px;background:rgba(107,216,198,.3);
  color:var(--brand-900);font-size:12px;font-weight:700;padding:5px 13px;border-radius:999px;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.tl-card h3{font-size:20px;line-height:28px;font-weight:600;margin:14px 0 10px}
.tl-card p{font-size:14px;line-height:24px;color:var(--ink-2)}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tl-tags span{font-size:12px;line-height:18px;color:var(--brand-700);background:rgba(18,165,148,.1);padding:4px 10px;border-radius:999px}
.tl-item--end{width:100%;margin-left:0;padding:0}
.tl-item--end::after{left:50%;right:auto;margin-left:-9px;top:-9px}
.tl-end{
  background:linear-gradient(135deg,rgba(18,165,148,.12) 0%,rgba(255,217,207,.5) 100%);
  border:1px solid rgba(107,216,198,.9);border-radius:24px;padding:30px 28px;text-align:center;
}
.tl-end h3{font-size:22px;line-height:30px;font-weight:600;margin-bottom:10px}
.tl-end p{font-size:14px;line-height:24px;color:var(--ink-2);max-width:620px;margin:0 auto 20px}
.tl-end .btn-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* ---------- stats ---------- */
.stats-band{
  background:var(--brand-900);border-radius:24px;padding:32px;
  display:grid;grid-template-columns:repeat(4,1fr);
}
.stat{padding:0 22px;border-left:1px solid rgba(255,255,255,.12)}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{font-size:32px;line-height:40px;font-weight:800;color:var(--gold-400);font-variant-numeric:tabular-nums}
.stat-num small{font-size:14px;font-weight:600;margin-left:2px}
.stat-label{font-size:13px;line-height:20px;color:rgba(255,255,255,.72);margin-top:4px}

/* ---------- split / figure ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.figure{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-2);background:var(--grad-brand);aspect-ratio:4/3}
.figure img{width:100%;height:100%;object-fit:cover}
.split h2{font-size:30px;line-height:38px;font-weight:700;margin-bottom:16px}
.split p{font-size:15px;line-height:27px;color:var(--ink-2);margin-bottom:16px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--line);
  font-size:15px;line-height:26px;color:var(--ink);
}
.check-list li:last-child{border-bottom:0}
.check-list .idx{
  flex:0 0 26px;height:26px;border-radius:999px;background:var(--grad-brand);color:#fff;
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;margin-top:3px;
}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:0;cursor:pointer;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:17px;font-weight:600;color:var(--ink);
  transition:color var(--t);
}
.faq-q:hover{color:var(--brand-700)}
.faq-icon{
  flex:0 0 32px;width:32px;height:32px;border-radius:50%;position:relative;
  background:rgba(18,165,148,.12);transition:transform var(--t),background var(--t);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-700);border-radius:2px;
  transform:translate(-50%,-50%);transition:opacity var(--t),transform var(--t);
}
.faq-icon::before{width:13px;height:2px}
.faq-icon::after{width:2px;height:13px}
.faq-item.open .faq-icon{transform:rotate(90deg);background:rgba(18,165,148,.2)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height var(--t),opacity var(--t)}
.faq-item.open .faq-a{opacity:1}
.faq-a p{font-size:15px;line-height:26px;color:var(--ink-2);padding:0 52px 22px 0}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--grad-brand);border-radius:var(--r-lg);
  padding:56px;text-align:center;color:#fff;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-90px;width:320px;height:320px;border-radius:50%;
  border:2px solid rgba(255,255,255,.08);box-shadow:0 0 0 40px rgba(255,255,255,.05);
}
.cta-band h2{font-size:30px;line-height:38px;font-weight:700;position:relative;z-index:2}
.cta-band p{font-size:15px;line-height:26px;color:rgba(255,255,255,.86);margin:14px auto 26px;max-width:560px;position:relative;z-index:2}
.cta-band .btn-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;position:relative;z-index:2}
.cta-note{font-size:12px;line-height:20px;color:rgba(255,255,255,.72);margin-top:22px;position:relative;z-index:2}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:#fff;padding:64px 0 28px;margin-top:72px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.site-footer .logo{color:#fff;font-size:17px;font-weight:700}
.site-footer .logo-mark .dot{fill:var(--brand-300)}
.site-footer .logo-mark .wave{stroke:var(--accent-200)}
.footer-brand p{font-size:14px;line-height:24px;color:rgba(255,255,255,.72);margin:18px 0 20px;max-width:320px}
.socials{display:flex;gap:10px}
.socials a{
  width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.1);color:#fff;font-size:13px;
  transition:background var(--t),transform var(--t);
}
.socials a:hover{background:var(--brand-500);transform:translateY(-2px);color:#fff}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a,.footer-col span{font-size:14px;line-height:22px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;line-height:20px;color:rgba(255,255,255,.62);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .nav a{padding:8px 9px;font-size:14px}
}
@media (max-width:1023px){
  .nav{
    position:fixed;top:0;right:0;height:100vh;width:84vw;max-width:360px;
    background:#fff;flex-direction:column;align-items:stretch;gap:4px;
    padding:92px 24px 28px;transform:translateX(101%);
    transition:transform var(--t);box-shadow:var(--shadow-3);z-index:70;margin-left:0;
  }
  .site-header.is-open .nav{transform:translateX(0)}
  .nav a{padding:14px 12px;font-size:16px;border-radius:14px}
  .nav a::after{display:none}
  .nav a.active{background:var(--grad-brand)}
  .nav-toggle{display:flex}
  .header-cta{margin-left:auto}
  .header-cta .btn{display:none}
  .timeline::before{left:14px;margin-left:0}
  .tl-item,.tl-item:nth-child(even){width:100%;margin-left:0;padding-left:46px;padding-right:0}
  .tl-item::after,.tl-item:nth-child(even)::after{left:5px;right:auto}
  .tl-item--end{padding-left:46px}
  .tl-item--end::after{left:5px;margin-left:0}
  .split{grid-template-columns:1fr;gap:32px}
  .stats-band{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .stat:nth-child(3){border-left:0;padding-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-banner h1{font-size:32px;line-height:40px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
  .section-head h2{font-size:22px;line-height:30px}
  .page-banner{padding:40px 0 36px}
  .page-banner h1{font-size:28px;line-height:36px}
  .banner-lead{font-size:15px;line-height:27px}
  .tl-card{padding:18px 18px}
  .tl-card h3{font-size:18px;line-height:26px}
  .tl-end h3{font-size:18px;line-height:26px}
  .tl-end .btn-row .btn{width:100%}
  .stats-band{padding:24px;border-radius:20px}
  .stat{padding:0 16px}
  .stat-num{font-size:26px;line-height:34px}
  .split h2{font-size:22px;line-height:30px}
  .faq-q{font-size:16px;padding:18px 0}
  .faq-a p{padding-right:0}
  .cta-band{padding:32px 22px;border-radius:22px}
  .cta-band h2{font-size:22px;line-height:30px}
  .cta-band .btn-row .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:48px 0 24px;margin-top:48px}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (max-width:480px){
  .logo{font-size:15px}
  .header-inner{height:60px;gap:10px}
  .stats-band{grid-template-columns:1fr;gap:20px}
  .stat{border-left:0;padding-left:0}
  .tag{font-size:12px;padding:6px 12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .tl-card:hover,.btn:hover{transform:none}
}

/* roulang page: category4 */
:root{
  --brand-900:#083F3A;
  --brand-700:#0B6E63;
  --brand-500:#12A594;
  --brand-300:#6BD8C6;
  --accent-500:#FF6B4A;
  --accent-200:#FFD9CF;
  --gold-400:#F5B301;
  --bg:#F6F7F4;
  --bg-card:#FFFFFF;
  --ink:#10201E;
  --ink-2:#4A5C59;
  --line:#E2E7E3;
  --grad-brand:linear-gradient(135deg,#083F3A 0%,#0B6E63 38%,#12A594 68%,#5AD6B8 100%);
  --grad-hot:linear-gradient(120deg,#FF6B4A 0%,#F5B301 100%);
  --grad-veil:linear-gradient(180deg,rgba(8,63,58,0) 45%,rgba(8,63,58,.86) 100%);
  --shadow-1:0 2px 8px rgba(8,63,58,.06);
  --shadow-2:0 12px 32px rgba(8,63,58,.10);
  --shadow-3:0 20px 48px rgba(8,63,58,.16);
  --r-xl:28px;
  --r-lg:24px;
  --r-md:20px;
  --r-sm:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-tight{padding:48px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:30px;font-weight:700}
.section-head p{margin-top:8px;color:var(--ink-2);font-size:14px;line-height:22px}
.num{font-variant-numeric:tabular-nums}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,247,244,.94);
  border-bottom:1px solid transparent;
  transition:height .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;transition:height .22s var(--ease)}
.site-header.is-scrolled{background:rgba(246,247,244,.86);backdrop-filter:blur(10px);border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.logo-mark{display:inline-flex;width:28px;height:28px}
.logo-mark .dot{fill:var(--brand-500)}
.logo-mark .wave{fill:none;stroke:var(--accent-500);stroke-width:1.6;stroke-linecap:round}
.logo:hover .logo-mark .dot{fill:var(--brand-700)}

.nav{display:flex;align-items:center;gap:6px}
.nav > a{
  position:relative;padding:8px 14px;font-size:15px;font-weight:500;color:var(--ink-2);border-radius:999px;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav > a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--grad-brand);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.nav > a:hover{color:var(--brand-700)}
.nav > a:hover::after{transform:scaleX(1)}
.nav > a.active{background:var(--grad-brand);color:#fff;padding:8px 16px}
.nav > a.active::after{display:none}

.header-cta{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--grad-hot);color:#fff;box-shadow:0 8px 20px rgba(255,107,74,.28)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(.92)}
.btn-outline{background:#fff;border-color:var(--brand-500);color:var(--brand-700)}
.btn-outline:hover{background:rgba(18,165,148,.08);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--brand-900)}
.btn-light:hover{background:var(--brand-900);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;filter:none}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transform:translateX(-50%);transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg) translateY(6px)}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg) translateY(-6px)}
.nav-extra{display:none}
.nav-mask{position:fixed;inset:0;background:rgba(8,63,58,.42);opacity:0;pointer-events:none;transition:opacity .22s var(--ease);z-index:55}
.nav-mask.is-open{opacity:1;pointer-events:auto}

/* ===== 页头 Banner ===== */
.page-banner{position:relative;overflow:hidden;background:var(--brand-900)}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;opacity:.26;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.28) 1.6px,transparent 1.7px);
  background-size:22px 22px;opacity:.42;
}
.page-banner .container{position:relative;z-index:2;padding-top:52px;padding-bottom:44px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;line-height:20px;color:rgba(255,255,255,.72);margin-bottom:18px}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.breadcrumb span[aria-current]{color:#fff;font-weight:500}
.page-banner h1{font-size:40px;line-height:48px;font-weight:700;color:#fff;max-width:820px}
.page-banner .banner-sub{margin-top:16px;max-width:720px;color:rgba(255,255,255,.82);font-size:15px;line-height:26px}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:500;background:rgba(107,216,198,.22);color:#EAFBF7;border:1px solid rgba(107,216,198,.35);
}
.tag-hot{background:var(--accent-200);color:#8C2D14;border-color:transparent}

/* ===== 引导区 ===== */
.lead-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:40px;align-items:center}
.lead-text h2{font-size:30px;font-weight:700;margin-bottom:20px}
.lead-text p{color:var(--ink-2);line-height:28px}
.lead-figure{border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-2);background:var(--grad-brand)}
.lead-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hint-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px}
.hint{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;
  box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.hint:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.hint .hint-no{
  font-size:32px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;
  background:var(--grad-hot);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hint h3{font-size:18px;font-weight:600;margin:14px 0 8px}
.hint p{font-size:14px;line-height:22px;color:var(--ink-2)}

/* ===== FAQ ===== */
.faq-block{max-width:860px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;background:none;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--ink);transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand-700)}
.faq-icon{
  position:relative;flex:0 0 auto;width:30px;height:30px;border-radius:50%;
  background:rgba(18,165,148,.12);transition:transform .22s var(--ease),background .22s var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--brand-700);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:2px}
.faq-icon::after{width:2px;height:12px}
.faq-item.is-open .faq-icon{transform:rotate(90deg);background:var(--brand-500)}
.faq-item.is-open .faq-icon::before,
.faq-item.is-open .faq-icon::after{background:#fff}
.faq-a{max-height:0;opacity:0;overflow:hidden;transition:max-height .22s var(--ease),opacity .22s var(--ease)}
.faq-item.is-open .faq-a{max-height:460px;opacity:1}
.faq-a-inner{padding:0 46px 24px 0;font-size:15px;line-height:26px;color:var(--ink-2)}
.faq-a-inner strong{color:var(--ink);font-weight:600}
.faq-note{
  margin-top:32px;padding:20px 24px;border-radius:var(--r-sm);background:#F0F6F4;
  border-left:4px solid var(--brand-500);font-size:14px;line-height:24px;color:var(--ink-2);
}

/* ===== CTA 条 ===== */
.cta-band{
  position:relative;overflow:hidden;background:var(--grad-brand);border-radius:var(--r-xl);
  padding:56px 40px;text-align:center;color:#fff;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:360px;height:360px;border-radius:50%;
  border:60px solid rgba(255,255,255,.08);
}
.cta-band h2{position:relative;z-index:2;font-size:30px;font-weight:700}
.cta-band p{position:relative;z-index:2;margin:14px auto 28px;max-width:520px;font-size:15px;line-height:26px;color:rgba(255,255,255,.86)}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.cta-fine{position:relative;z-index:2;margin-top:24px;font-size:12px;color:rgba(255,255,255,.72)}

/* ===== 表单 ===== */
.form-wrap{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:start}
.form-intro h2{font-size:30px;font-weight:700;margin-bottom:16px}
.form-intro p{color:var(--ink-2)}
.form-intro ul{margin-top:22px;display:grid;gap:12px}
.form-intro li{display:flex;gap:10px;font-size:14px;line-height:22px;color:var(--ink-2)}
.form-intro li::before{
  content:"";flex:0 0 auto;width:8px;height:8px;margin-top:7px;border-radius:50%;background:var(--brand-500);
}
.form-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-xl);padding:32px;box-shadow:var(--shadow-1)}
.field{margin-bottom:20px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;color:var(--ink)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 14px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;
  font-size:15px;line-height:22px;transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(18,165,148,.15);
}
.field .err{display:none;margin-top:6px;font-size:12px;color:#E5484D}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:#E5484D}
.field.has-error .err{display:block}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:8px}
.form-tip{font-size:12px;color:var(--ink-2)}
.form-success{
  display:none;margin-top:20px;padding:14px 18px;border-radius:var(--r-sm);
  background:rgba(18,165,148,.12);border:1px solid rgba(18,165,148,.35);color:var(--brand-700);font-size:14px;
}
.form-success.is-visible{display:block}

/* ===== 页脚 ===== */
.site-footer{background:var(--brand-900);color:#fff;margin-top:72px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.site-footer .logo{color:#fff;font-size:17px;font-weight:700}
.site-footer .logo-mark .dot{fill:rgba(255,255,255,.82)}
.site-footer .logo-mark .wave{stroke:var(--accent-500)}
.footer-brand p{margin-top:18px;font-size:14px;line-height:24px;color:rgba(255,255,255,.72);max-width:340px}
.socials{display:flex;gap:10px;margin-top:22px}
.socials a{
  display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;
  border:1px solid rgba(255,255,255,.24);font-size:13px;color:rgba(255,255,255,.82);
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.socials a:hover{background:var(--brand-500);color:#fff;transform:translateY(-2px)}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-col ul{display:grid;gap:12px}
.footer-col a,.footer-col span{font-size:14px;line-height:22px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:48px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:rgba(255,255,255,.6);
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .hint:hover,.btn:hover,.socials a:hover{transform:none}
}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .page-banner h1{font-size:36px;line-height:44px}
}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .header-cta .btn-primary{display:none}
  .nav{
    position:fixed;top:0;right:0;z-index:70;width:84vw;max-width:360px;height:100vh;
    flex-direction:column;align-items:stretch;gap:6px;
    background:#fff;padding:88px 24px 32px;box-shadow:var(--shadow-3);
    transform:translateX(100%);transition:transform .22s var(--ease);overflow-y:auto;
  }
  .nav.is-open{transform:translateX(0)}
  .nav > a{padding:14px 16px;font-size:16px;border-radius:var(--r-sm)}
  .nav > a::after{display:none}
  .nav > a.active{background:var(--grad-brand);color:#fff}
  .nav-extra{display:block;margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}
  .nav-extra .btn{width:100%}
  .nav-extra p{margin-top:16px;font-size:13px;line-height:22px;color:var(--ink-2)}
  .lead-grid{grid-template-columns:1fr;gap:32px}
  .hint-row{grid-template-columns:1fr 1fr}
  .form-wrap{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:56px 0}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .page-banner .container{padding-top:36px;padding-bottom:32px}
  .page-banner h1{font-size:28px;line-height:36px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .section-head h2{font-size:22px}
  .lead-text h2{font-size:22px}
  .hint-row{grid-template-columns:1fr}
  .faq-q{font-size:16px;padding:18px 0}
  .faq-a-inner{padding-right:0}
  .cta-band{padding:32px 20px;border-radius:var(--r-md)}
  .cta-band h2{font-size:22px}
  .cta-actions .btn{width:100%}
  .form-card{padding:22px}
  .section{padding:48px 0}
  .site-footer{padding:48px 0 24px;margin-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:480px){
  .page-banner h1{font-size:26px;line-height:34px}
  .banner-tags{gap:8px}
  .tag{font-size:12px;padding:5px 12px}
  .hint{padding:18px}
  .hint .hint-no{font-size:26px}
  .form-actions .btn{width:100%}
}