/* roulang page: index */
:root{
  --c-ink:#0F1216;
  --c-ink-2:#1B2027;
  --c-paper:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-line:#E2DED4;
  --c-muted:#6C7278;
  --c-accent:#C6F24E;
  --c-accent-ink:#0F1216;
  --c-tint:#EDEAE1;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"DIN Alternate","Helvetica Neue",ui-monospace,SFMono-Regular,monospace;
  --r-card:20px;
  --r-lg:24px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(15,18,22,.04),0 14px 30px -20px rgba(15,18,22,.20);
  --shadow-2:0 1px 2px rgba(15,18,22,.06),0 22px 44px -24px rgba(15,18,22,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:220ms;
  --sec:96px;
  --bs-primary:#0F1216;
  --bs-body-color:#0F1216;
  --bs-body-bg:#F5F3EE;
  --bs-border-radius:20px;
  --bs-border-color:#E2DED4;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  --bs-link-color:#0F1216;
  --bs-link-hover-color:#1B2027;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-paper);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  padding-bottom:0;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--t) var(--ease)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2}
::selection{background:var(--c-accent);color:var(--c-accent-ink)}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:6px}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
.sec{padding:var(--sec) 0}
.sec-tight{padding:72px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.sec-title{font-size:clamp(26px,2.6vw,34px);line-height:1.2;letter-spacing:-.02em}
.sec-desc{margin-top:12px;color:var(--c-muted);font-size:15px;max-width:640px}
.more-link{font-size:14px;font-weight:600;color:var(--c-ink);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;border-bottom:2px solid transparent;transition:border-color var(--t) var(--ease),color var(--t) var(--ease)}
.more-link:hover{border-bottom-color:var(--c-accent)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--c-muted);margin-bottom:16px}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--c-accent);display:block}

/* ===== 导航 ===== */
.site-head{position:sticky;top:0;z-index:1030;padding-top:12px;background:linear-gradient(180deg,rgba(245,243,238,.96) 0%,rgba(245,243,238,.72) 70%,rgba(245,243,238,0) 100%)}
.nav-panel{
  max-width:1240px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--c-line);border-radius:22px;
  padding:10px 12px 10px 16px;box-shadow:var(--shadow-1);
}
.logo{display:inline-flex;align-items:center;gap:10px;min-width:0}
.logo-mark{width:28px;height:28px;border-radius:9px;background:var(--c-ink);color:var(--c-accent);display:grid;place-items:center;font-size:15px;font-weight:800;line-height:1;flex:0 0 auto}
.logo-text{font-size:16px;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.logo-text b{font-weight:800}
.logo-text span{font-weight:500;color:var(--c-ink-2)}
.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:nowrap}
.nav-link{
  position:relative;height:38px;padding:0 14px;border-radius:12px;
  display:inline-flex;align-items:center;font-size:14px;font-weight:500;color:var(--c-ink-2);
  white-space:nowrap;transition:background var(--t) var(--ease),color var(--t) var(--ease);
}
.nav-link:hover{background:var(--c-paper);color:var(--c-ink)}
.nav-link.active{background:var(--c-tint);color:var(--c-ink);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent)}
.nav-actions{display:flex;align-items:center;gap:8px}
.nav-toggle{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--c-line);background:var(--c-surface);
  display:none;place-items:center;color:var(--c-ink);
}
.nav-toggle svg{width:18px;height:18px}

/* ===== 按钮 ===== */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;border:1.5px solid transparent;
  transition:background var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
  cursor:pointer;white-space:nowrap;
}
.btn-ink{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink)}
.btn-ink:hover{background:var(--c-accent);color:var(--c-accent-ink);border-color:var(--c-accent)}
.btn-ink:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:var(--c-ink)}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper)}
.btn-ghost:active{transform:translateY(1px)}
.btn-accent{background:var(--c-accent);color:var(--c-accent-ink);border-color:var(--c-accent)}
.btn-accent:hover{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-surface)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.arw{transition:transform var(--t) var(--ease);display:inline-block}
.btn-x:hover .arw{transform:translateX(4px)}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:56px 0 var(--sec)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(15,18,22,.055) 1px,transparent 1px);
  background-size:22px 22px;opacity:.75;pointer-events:none;
  -webkit-mask-image:linear-gradient(to bottom,#000 0%,rgba(0,0,0,.35) 55%,transparent 88%);
  mask-image:linear-gradient(to bottom,#000 0%,rgba(0,0,0,.35) 55%,transparent 88%);
}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;min-height:600px}
.hero-title{font-size:clamp(40px,5vw,66px);line-height:1.05;letter-spacing:-.03em;font-weight:800;margin-bottom:20px}
.hero-title em{font-style:normal;position:relative;white-space:nowrap}
.hero-title em::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:10px;background:var(--c-accent);opacity:.55;z-index:-1;border-radius:4px}
.hero-sub{font-size:17px;line-height:1.85;color:var(--c-muted);max-width:520px;margin-bottom:30px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-trust{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--c-muted)}
.hero-trust span{display:inline-flex;align-items:center;gap:10px}
.hero-trust span:not(:last-child)::after{content:"·";color:var(--c-line)}
.hero-media{position:relative}
.hero-media .shot{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--c-line);box-shadow:var(--shadow-2);background:var(--c-tint);
}
.data-card{
  position:absolute;left:-22px;bottom:-22px;
  background:var(--c-ink);color:#fff;border-radius:18px;padding:16px 20px;
  display:flex;gap:24px;box-shadow:var(--shadow-2);
}
.data-card .item{display:flex;flex-direction:column;gap:2px}
.data-card .num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:24px;font-weight:700;color:var(--c-accent);line-height:1.1}
.data-card .lbl{font-size:12px;color:rgba(255,255,255,.66);white-space:nowrap}

/* ===== 卖点三连 ===== */
.sell-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.sell-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-1);
  transition:border-color var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
  display:flex;flex-direction:column;
}
.sell-card:hover{border-color:rgba(15,18,22,.22);transform:translateY(-3px);box-shadow:var(--shadow-2)}
.sell-card.is-lead{grid-column:span 6;background:var(--c-ink);color:#fff;border-color:var(--c-ink)}
.sell-card.is-lead:hover{border-color:var(--c-ink)}
.sell-card.small{grid-column:span 3}
.sell-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:44px;font-weight:700;line-height:1;letter-spacing:-.02em;color:var(--c-accent);margin-bottom:20px}
.sell-icon{width:24px;height:24px;color:var(--c-ink);margin-bottom:16px}
.sell-card.is-lead .sell-icon{color:var(--c-accent)}
.sell-h{font-size:18px;font-weight:700;margin-bottom:10px;letter-spacing:-.01em}
.sell-p{font-size:14px;line-height:1.8;color:var(--c-muted);margin:0}
.sell-card.is-lead .sell-p{color:rgba(255,255,255,.72);font-size:15px}
.sell-card.is-lead .sell-h{font-size:22px}

/* ===== 步骤演示 ===== */
.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.step-list{position:relative}
.step-item{display:grid;grid-template-columns:64px 1fr;gap:18px;padding:16px 0;position:relative}
.step-item::before{content:"";position:absolute;left:21px;top:58px;bottom:-6px;border-left:1px dashed var(--c-line)}
.step-item:last-child::before{display:none}
.step-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:40px;font-weight:700;line-height:1;color:var(--c-ink);opacity:.18}
.step-h{font-size:18px;font-weight:700;margin-bottom:6px}
.step-p{font-size:14px;line-height:1.8;color:var(--c-muted);margin:0;max-width:400px}
.device{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:12px;box-shadow:var(--shadow-1)}
.device img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:14px;background:var(--c-tint)}
.device-bar{display:flex;align-items:center;gap:6px;padding:2px 4px 10px}
.device-bar i{width:8px;height:8px;border-radius:50%;background:var(--c-line);display:block}
.device-cap{font-size:13px;color:var(--c-muted);margin-top:12px;text-align:center}

/* ===== 准备清单 ===== */
.prep-band{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);padding:36px;box-shadow:var(--shadow-1)}
.prep-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px 32px;margin-top:12px}
.prep-item{display:flex;align-items:flex-start;gap:12px;font-size:15px;line-height:1.7;padding:10px 0;border-bottom:1px solid var(--c-line)}
.prep-item svg{width:18px;height:18px;flex:0 0 auto;margin-top:5px;color:var(--c-ink)}
.prep-item b{font-weight:700}
.prep-item span{color:var(--c-muted);font-size:14px}

/* ===== 最新信息 ===== */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--c-surface);border:1px solid var(--c-line);font-size:13px;font-weight:500;color:var(--c-ink-2);
  transition:background var(--t) var(--ease),border-color var(--t) var(--ease),color var(--t) var(--ease);
}
.chip:hover{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-paper)}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:border-color var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.post-card:hover{border-color:rgba(15,18,22,.22);transform:translateY(-3px);box-shadow:var(--shadow-2)}
.post-card .thumb{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--c-tint)}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge-x{display:inline-block;font-size:12px;font-weight:600;background:var(--c-tint);color:var(--c-ink);border-radius:var(--r-pill);padding:3px 10px;line-height:1.6;align-self:flex-start}
.post-title{font-size:18px;font-weight:700;line-height:1.45;letter-spacing:-.01em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:var(--c-ink)}
.post-card:hover .post-title{color:var(--c-ink-2);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:var(--c-accent)}
.post-sum{font-size:14px;line-height:1.75;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.post-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:8px;font-size:13px;color:var(--c-muted)}
.post-foot .go{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--c-ink)}
.empty-state{padding:56px 24px;text-align:center;border:1px dashed var(--c-line);border-radius:var(--r-card);background:var(--c-surface)}
.empty-state svg{width:32px;height:32px;color:var(--c-muted);margin:0 auto 14px}
.empty-state p{font-size:15px;color:var(--c-muted);margin:0 0 18px}

/* ===== 社会认同 ===== */
.band-white{background:var(--c-surface);border-radius:var(--r-lg);padding:56px 0;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;background:var(--c-ink);border-radius:var(--r-card);padding:30px 28px;color:#fff}
.stat-item{padding-left:18px;border-left:2px solid rgba(255,255,255,.14)}
.stat-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:36px;font-weight:700;line-height:1.1;color:var(--c-accent)}
.stat-lbl{font-size:13px;color:rgba(255,255,255,.66);margin-top:6px}
.quotes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}
.quote-card{background:var(--c-paper);border-left:3px solid var(--c-accent);border-radius:16px;padding:26px 24px;display:flex;flex-direction:column;gap:16px}
.quote-card p{font-size:15px;line-height:1.85;color:var(--c-ink-2);margin:0}
.quote-who{display:flex;align-items:center;gap:12px}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--c-tint);display:grid;place-items:center;font-size:13px;font-weight:700;color:var(--c-ink);flex:0 0 auto}
.quote-who b{font-size:14px;font-weight:700;display:block;line-height:1.4}
.quote-who span{font-size:12px;color:var(--c-muted);display:block;line-height:1.4}

/* ===== FAQ ===== */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-aside{position:sticky;top:96px}
.faq-aside p{color:var(--c-muted);font-size:15px;margin-top:14px;max-width:280px}
.faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--c-line);border-radius:0}
.faq .accordion-button{
  background:transparent;color:var(--c-ink);font-size:16px;font-weight:600;line-height:1.6;
  padding:20px 44px 20px 0;box-shadow:none;border-radius:0;
  transition:color var(--t) var(--ease);
}
.faq .accordion-button:hover{color:var(--c-ink-2)}
.faq .accordion-button:not(.collapsed){background:transparent;color:var(--c-ink);box-shadow:none}
.faq .accordion-button:focus{box-shadow:none;border-color:transparent;outline:2px solid var(--c-accent);outline-offset:2px}
.faq .accordion-button::after{
  content:"+";background-image:none;width:26px;height:26px;line-height:1;
  display:grid;place-items:center;font-size:18px;font-weight:400;color:var(--c-muted);
  transform:none;transition:transform var(--t) var(--ease),color var(--t) var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{content:"−";background-image:none;transform:rotate(180deg);color:var(--c-ink)}
.faq .accordion-body{padding:0 56px 20px 0;font-size:15px;line-height:1.85;color:var(--c-muted)}

/* ===== CTA ===== */
.cta-band{
  background:var(--c-ink);border-radius:var(--r-lg);padding:44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;color:#fff;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.16) 0%,rgba(198,242,78,0) 70%);
}
.cta-band h2{font-size:clamp(24px,2.4vw,32px);line-height:1.25;margin-bottom:10px;position:relative}
.cta-band p{margin:0;font-size:14px;color:rgba(255,255,255,.66);position:relative}
.cta-band .btn-x{position:relative;z-index:1}

/* ===== 固定转化条 ===== */
.fixed-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;align-items:center;gap:14px;
  background:var(--c-ink);color:#fff;border-radius:var(--r-pill);
  padding:10px 10px 10px 20px;box-shadow:var(--shadow-2);
  opacity:0;transform:translateY(8px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
  max-width:360px;
}
.fixed-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.fixed-cta .fc-text{font-size:13px;white-space:nowrap;color:rgba(255,255,255,.86)}

/* ===== 页脚 ===== */
.site-foot{background:var(--c-ink);color:#fff;border-radius:var(--r-lg) var(--r-lg) 0 0;margin-top:var(--sec);padding:56px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand .logo-text{color:#fff;font-size:17px}
.foot-brand .logo-text span{color:rgba(255,255,255,.7)}
.foot-brand .logo-mark{background:var(--c-accent);color:var(--c-ink)}
.foot-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin:16px 0 12px;max-width:280px}
.foot-domain{font-size:13px;color:rgba(255,255,255,.42);font-family:var(--font-num);letter-spacing:.02em}
.foot-h{font-size:13px;font-weight:700;letter-spacing:.06em;color:rgba(255,255,255,.5);margin-bottom:16px;text-transform:uppercase}
.foot-list li{margin-bottom:10px;font-size:14px}
.foot-list a{color:rgba(255,255,255,.76)}
.foot-list a:hover{color:var(--c-accent)}
.foot-contact{font-size:14px;color:rgba(255,255,255,.62);line-height:1.9}
.foot-contact b{color:#fff;font-weight:600}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.46)}

/* ===== 动效 ===== */
.js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .hero-grid{gap:40px}
  .demo-grid{gap:40px}
}
@media (max-width:991px){
  :root{--sec:72px}
  .nav-links{display:none}
  .nav-actions .btn-x{display:none}
  .nav-toggle{display:grid}
  .hero-grid{grid-template-columns:1fr;min-height:0;gap:40px}
  .hero-title{font-size:clamp(34px,7vw,52px)}
  .hero-sub{max-width:none}
  .hero-media{order:2}
  .data-card{left:0;bottom:-18px;padding:14px 16px;gap:18px}
  .sell-card.is-lead{grid-column:span 12}
  .sell-card.small{grid-column:span 6}
  .demo-grid{grid-template-columns:1fr}
  .prep-grid{grid-template-columns:repeat(2,1fr)}
  .prep-band{padding:28px}
  .stat-bar{grid-template-columns:repeat(2,1fr);gap:20px}
  .quotes-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr;gap:24px}
  .faq-aside{position:static}
  .faq-aside p{max-width:none}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
  .cta-band .btn-x{width:100%}
  .body{padding-bottom:84px}
}
@media (max-width:767px){
  .wrap{padding:0 18px}
  .post-grid{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px}
  .nav-panel{border-radius:18px;padding:8px 10px 8px 12px}
  .logo-text{font-size:15px}
  .stat-bar{padding:24px 20px}
  .prep-grid{grid-template-columns:1fr}
  .fixed-cta{
    left:0;right:0;bottom:0;max-width:none;border-radius:0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));
    justify-content:space-between;height:64px;align-items:center;
  }
  .fixed-cta .fc-text{font-size:13px;white-space:normal;line-height:1.3}
  body{padding-bottom:84px}
}
@media (max-width:575px){
  :root{--sec:52px}
  .hero{padding-top:32px}
  .hero-title{font-size:34px;line-height:1.12}
  .hero-sub{font-size:15px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn-x{width:100%}
  .hero-cta .btn-ghost{height:44px}
  .sell-card.small{grid-column:span 12}
  .sell-card{padding:20px}
  .sell-num{font-size:36px;margin-bottom:14px}
  .step-item{grid-template-columns:48px 1fr;gap:14px}
  .step-num{font-size:32px}
  .step-item::before{left:16px;top:48px}
  .cta-band{padding:26px 22px}
  .post-body{padding:18px}
  .stat-num{font-size:28px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .js [data-reveal]{opacity:1;transform:none}
}
/* Bootstrap 覆盖 */
.accordion{--bs-accordion-border-color:transparent;--bs-accordion-bg:transparent;--bs-accordion-btn-focus-box-shadow:none}
.offcanvas{border-radius:24px 0 0 24px;background:var(--c-surface);border-left:1px solid var(--c-line)}
.offcanvas-header{border-bottom:1px solid var(--c-line);padding:18px 20px}
.offcanvas-title{font-size:16px;font-weight:700}
.offcanvas-body{padding:16px 20px 24px}
.drawer-link{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 16px;border-radius:14px;font-size:15px;font-weight:500;color:var(--c-ink-2);border:1px solid transparent}
.drawer-link:hover{background:var(--c-paper)}
.drawer-link.active{background:var(--c-tint);border-color:var(--c-line);font-weight:600;color:var(--c-ink)}
.drawer-foot{margin-top:18px}
.drawer-foot .btn-x{width:100%}

/* roulang page: article */
:root{
  --c-ink:#0F1216;
  --c-ink-2:#1B2027;
  --c-paper:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-line:#E2DED4;
  --c-muted:#6C7278;
  --c-accent:#C6F24E;
  --c-accent-ink:#0F1216;
  --c-tint:#EDEAE1;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"DIN Alternate","Helvetica Neue",ui-monospace,monospace;
  --r-sm:12px;
  --r-card:20px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,18,22,.04), 0 14px 30px -20px rgba(15,18,22,.20);
  --sh-2:0 2px 6px rgba(15,18,22,.06), 0 22px 44px -24px rgba(15,18,22,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sp-section:96px;
  --bs-primary:#0F1216;
  --bs-body-color:#1B2027;
  --bs-body-bg:#F5F3EE;
  --bs-border-radius:12px;
  --bs-font-sans-serif:var(--font-sans);
  --bs-link-color:#0F1216;
  --bs-link-hover-color:#0F1216;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink-2);
  background:var(--c-paper);
  padding-bottom:84px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-ink);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--c-ink-2);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:800;letter-spacing:-.02em;}
p{margin:0;}
ul,ol{margin:0;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:6px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px;}

/* ---------- 导航 ---------- */
.site-head{position:sticky;top:12px;z-index:1030;padding:12px 0 0;}
.nav-card{
  display:flex;align-items:center;gap:18px;
  max-width:1240px;margin:0 auto;
  padding:10px 14px;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--c-line);
  border-radius:22px;
  box-shadow:var(--sh-1);
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:28px;height:28px;border-radius:8px;background:var(--c-ink);color:var(--c-accent);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;letter-spacing:0;
}
.logo-text{display:inline-flex;flex-direction:column;line-height:1.15;font-size:14px;color:var(--c-ink);}
.logo-text b{font-weight:800;}
.logo-text span{font-weight:500;font-size:12px;color:var(--c-muted);}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:nowrap;}
.nav-link{
  display:inline-flex;align-items:center;height:38px;padding:0 14px;
  border-radius:12px;font-size:13px;font-weight:600;color:var(--c-ink-2);
  white-space:nowrap;transition:background .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease);
}
.nav-link:hover{background:var(--c-paper);color:var(--c-ink);}
.nav-link.active{background:var(--c-tint);color:var(--c-ink);box-shadow:inset 0 -2px 0 var(--c-accent);}
.nav-cta{flex:none;}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);border:0;
  background:var(--c-ink);color:var(--c-paper);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),transform .18s var(--ease),box-shadow .22s var(--ease);
}
.btn-main:hover{background:var(--c-accent);color:var(--c-accent-ink);box-shadow:var(--sh-2);}
.btn-main:active{transform:translateY(1px);}
.btn-main .arw{transition:transform .22s var(--ease);}
.btn-main:hover .arw{transform:translateX(4px);}
.btn-main.sm{height:40px;padding:0 18px;font-size:13px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  border:1.5px solid var(--c-ink);background:transparent;color:var(--c-ink);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),transform .18s var(--ease);
}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper);}
.btn-ghost:active{transform:translateY(1px);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--c-line);
  background:var(--c-surface);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--c-ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--c-ink);}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}
.offcanvas.drawer{
  background:var(--c-paper);border-radius:22px 0 0 22px;max-width:84vw;width:320px;
  border-left:1px solid var(--c-line);
}
.drawer .offcanvas-header{border-bottom:1px solid var(--c-line);padding:18px 20px;}
.drawer .offcanvas-body{padding:18px 20px 24px;display:flex;flex-direction:column;gap:8px;}
.drawer .nav-link{height:46px;justify-content:flex-start;font-size:14px;background:var(--c-surface);border:1px solid var(--c-line);}
.drawer .nav-link.active{background:var(--c-tint);}
.drawer .btn-main{width:100%;margin-top:12px;}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:28px 0 0;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);flex-wrap:wrap;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-ink);}
.crumb .sep{color:var(--c-line);}
.crumb .current{color:var(--c-ink);font-weight:600;max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 文章头部 ---------- */
.article-head{padding:26px 0 0;}
.badge-tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-tint);color:var(--c-ink);font-size:12px;font-weight:600;
}
.badge-tag.dark{background:var(--c-accent);color:var(--c-accent-ink);}
.article-title{
  font-size:clamp(26px,3vw,38px);
  line-height:1.28;letter-spacing:-.02em;margin:14px 0 0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.meta-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:16px;}
.meta-item{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-muted);}
.meta-item b{color:var(--c-ink);font-weight:600;}
.share-group{display:flex;align-items:center;gap:8px;margin-left:auto;}
.share-btn{
  width:32px;height:32px;border-radius:50%;border:1px solid var(--c-line);background:var(--c-surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--c-ink);cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.share-btn:hover{background:var(--c-tint);border-color:rgba(15,18,22,.22);transform:translateY(-2px);}
.share-btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.hero-media{
  margin-top:28px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--c-line);
  background:var(--c-tint);aspect-ratio:16/7;box-shadow:var(--sh-1);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}

/* ---------- 正文区 ---------- */
.read-area{padding:56px 0 0;}
.article-body{
  max-width:760px;font-size:16px;line-height:1.9;color:var(--c-ink-2);
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  font-size:24px;line-height:1.35;font-weight:800;margin:2.4em 0 .8em;letter-spacing:-.01em;
  padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--c-accent);
}
.article-body h3{font-size:20px;line-height:1.45;margin:2em 0 .6em;font-weight:700;}
.article-body h4{font-size:17px;margin:1.6em 0 .5em;}
.article-body p{margin:0 0 1.2em;}
.article-body ul,.article-body ol{padding-left:24px;margin:0 0 1.2em;}
.article-body li{margin-bottom:.5em;line-height:1.8;}
.article-body blockquote{
  margin:1.6em 0;padding:16px 24px;background:var(--c-paper);
  border-left:3px solid var(--c-accent);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--c-ink);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:16px;margin:1.6em 0 .6em;width:100%;height:auto;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--c-muted);margin-top:8px;}
.article-body a{color:var(--c-ink);text-decoration:underline;text-decoration-color:var(--c-accent);text-decoration-thickness:2px;text-underline-offset:3px;}
.article-body a:hover{color:var(--c-ink-2);}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;margin:1.6em 0;font-size:14px;
  border:1px solid var(--c-line);border-radius:16px;overflow:hidden;background:var(--c-surface);
}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--c-line);text-align:left;}
.article-body th{background:var(--c-paper);font-weight:700;color:var(--c-ink);}
.article-body tr:last-child td{border-bottom:0;}
.article-body strong{color:var(--c-ink);font-weight:700;}
.article-body code{background:var(--c-tint);border-radius:6px;padding:2px 6px;font-family:var(--font-num);font-size:14px;}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0;}

/* ---------- 侧栏 ---------- */
.side-inner{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-1);
}
.side-h{font-size:13px;font-weight:700;color:var(--c-muted);letter-spacing:.06em;margin-bottom:14px;text-transform:uppercase;}
.toc-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px;max-height:320px;overflow:auto;}
.toc-list a{
  display:block;font-size:13px;line-height:1.6;color:var(--c-ink-2);padding:7px 10px;border-radius:10px;
  border-left:2px solid transparent;transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.toc-list a:hover{background:var(--c-paper);color:var(--c-ink);}
.toc-list a.lv3{padding-left:22px;color:var(--c-muted);font-size:12.5px;}
.toc-list a.on{background:var(--c-tint);border-left-color:var(--c-accent);color:var(--c-ink);font-weight:600;}
.side-cta{
  background:var(--c-ink);color:rgba(245,243,238,.78);border-radius:var(--r-card);padding:24px;
  border:1px solid var(--c-ink);box-shadow:var(--sh-1);
}
.side-cta h3{color:#fff;font-size:18px;line-height:1.4;margin-bottom:10px;}
.side-cta p{font-size:13px;line-height:1.75;margin-bottom:16px;color:rgba(245,243,238,.72);}
.side-cta .btn-main{width:100%;background:var(--c-accent);color:var(--c-accent-ink);height:44px;font-size:14px;}
.side-cta .btn-main:hover{background:#fff;color:var(--c-ink);}
.side-points{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.side-points li{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.7;color:var(--c-ink-2);}
.dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent);margin-top:8px;flex:none;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-section) 0 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;}
.sec-title{font-size:clamp(26px,2.6vw,34px);line-height:1.2;letter-spacing:-.02em;}
.sec-sub{font-size:14px;color:var(--c-muted);margin-top:8px;max-width:560px;}
.link-more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.link-more:hover{color:var(--c-ink-2);}
.link-more:hover .arw{transform:translateX(4px);}
.arw{transition:transform .22s var(--ease);}

/* ---------- 相关推荐 ---------- */
.rel-card{
  display:flex;gap:14px;align-items:center;height:100%;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:14px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(15,18,22,.22);}
.rel-thumb{width:96px;height:64px;border-radius:12px;overflow:hidden;flex:none;background:var(--c-tint);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;}
.rel-body{min-width:0;}
.rel-body h3{
  font-size:14px;line-height:1.5;font-weight:700;margin-bottom:6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card:hover .rel-body h3{text-decoration:underline;text-decoration-color:var(--c-accent);text-decoration-thickness:2px;text-underline-offset:3px;}
.rel-date{font-size:12px;color:var(--c-muted);font-family:var(--font-num);}

/* ---------- 上下篇 ---------- */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px;}
.pager-card{
  display:flex;flex-direction:column;gap:6px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.pager-card:hover{transform:translateY(-3px);border-color:rgba(15,18,22,.22);box-shadow:var(--sh-2);}
.pager-label{font-size:12px;color:var(--c-muted);font-weight:600;display:flex;align-items:center;gap:8px;}
.pager-title{font-size:15px;font-weight:700;color:var(--c-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.pager-card.next{text-align:right;}
.pager-card.next .pager-label{justify-content:flex-end;}
.back-wrap{margin-top:36px;}

/* ---------- 空态 ---------- */
.empty-state{
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-card);
  padding:64px 24px;text-align:center;box-shadow:var(--sh-1);
}
.empty-state svg{width:52px;height:52px;stroke:var(--c-muted);fill:none;stroke-width:1.5;margin:0 auto 18px;}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{font-size:14px;color:var(--c-muted);margin-bottom:22px;}

/* ---------- 固定转化条 ---------- */
.sticky-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;align-items:center;gap:12px;
  background:var(--c-ink);color:var(--c-paper);
  padding:10px 10px 10px 20px;border-radius:var(--r-pill);
  box-shadow:0 14px 34px -14px rgba(15,18,22,.55);
  max-width:360px;opacity:0;transform:translateY(8px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.sticky-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.sticky-cta-text{font-size:13px;font-weight:600;line-height:1.4;color:rgba(245,243,238,.92);}
.sticky-cta .btn-main{
  height:38px;padding:0 16px;font-size:13px;background:var(--c-accent);color:var(--c-accent-ink);flex:none;
}
.sticky-cta .btn-main:hover{background:#fff;color:var(--c-ink);}

/* ---------- 移动端返回 ---------- */
.back-float{
  display:none;position:fixed;left:16px;top:16px;z-index:1035;
  width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.94);
  border:1px solid var(--c-line);align-items:center;justify-content:center;box-shadow:var(--sh-1);
}
.back-float svg{width:16px;height:16px;stroke:var(--c-ink);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 页脚 ---------- */
.site-foot{margin-top:var(--sp-section);background:var(--c-ink);color:rgba(245,243,238,.72);border-radius:24px 24px 0 0;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 0;}
.site-foot .logo-text{color:#fff;}
.site-foot .logo-text span{color:rgba(245,243,238,.62);}
.site-foot .logo-mark{background:var(--c-accent);color:var(--c-ink);}
.foot-desc{font-size:13px;line-height:1.8;margin-top:16px;max-width:280px;color:rgba(245,243,238,.62);}
.foot-domain{
  display:inline-flex;margin-top:14px;font-family:var(--font-num);font-size:12px;letter-spacing:.04em;
  color:rgba(245,243,238,.5);border:1px solid rgba(245,243,238,.16);border-radius:var(--r-pill);padding:4px 12px;
}
.foot-h{font-size:13px;font-weight:700;color:#fff;letter-spacing:.04em;margin-bottom:16px;}
.foot-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.foot-list a{font-size:13.5px;color:rgba(245,243,238,.66);}
.foot-list a:hover{color:var(--c-accent);}
.foot-contact{font-size:13px;line-height:1.9;color:rgba(245,243,238,.62);}
.foot-contact b{color:#fff;font-weight:600;}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(245,243,238,.12);margin-top:48px;padding:20px 0 28px;font-size:12px;
  color:rgba(245,243,238,.45);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .nav-links{gap:2px;}
  .nav-link{padding:0 10px;font-size:12.5px;}
  :root{--sp-section:84px;}
}
@media (max-width:991.98px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  :root{--sp-section:72px;}
  .side-inner{position:static;margin-top:40px;}
  .hero-media{aspect-ratio:16/9;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding-top:52px;}
}
@media (max-width:767.98px){
  body{padding-bottom:76px;}
  .wrap{padding:0 18px;}
  :root{--sp-section:56px;}
  .article-title{font-size:26px;}
  .share-group{margin-left:0;}
  .crumb .current{max-width:62vw;}
  .pager{grid-template-columns:1fr;}
  .pager-card.next{text-align:left;}
  .pager-card.next .pager-label{justify-content:flex-start;}
  .back-float{display:inline-flex;}
  .site-head{top:8px;padding-top:8px;}
  .hero-media{aspect-ratio:4/3;}
}
@media (max-width:575.98px){
  body{font-size:15px;}
  .sec-title{font-size:24px;}
  .article-body{font-size:15.5px;}
  .side-card{padding:18px;}
  .side-cta{padding:20px;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .sticky-cta{
    left:0;right:0;bottom:0;max-width:none;border-radius:16px 16px 0 0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    justify-content:space-between;
  }
  .sticky-cta-text{font-size:12.5px;}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  .sticky-cta{transition:none;}
}

/* roulang page: category1 */
:root{
  --c-ink:#0F1216;
  --c-ink-2:#1B2027;
  --c-paper:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-line:#E2DED4;
  --c-muted:#6C7278;
  --c-accent:#C6F24E;
  --c-accent-ink:#0F1216;
  --c-tint:#EDEAE1;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
  --font-num:"DIN Alternate","Helvetica Neue",ui-monospace,monospace;
  --r-card:20px;
  --r-big:24px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,18,22,.04),0 14px 30px -20px rgba(15,18,22,.20);
  --sh-2:0 2px 4px rgba(15,18,22,.06),0 22px 44px -24px rgba(15,18,22,.26);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec:96px;
  --bs-primary:#0F1216;
  --bs-body-color:#0F1216;
  --bs-body-bg:#F5F3EE;
  --bs-border-radius:.75rem;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
  --bs-link-color:#0F1216;
  --bs-link-hover-color:#1B2027;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-paper);
  -webkit-font-smoothing:antialiased;
  padding-bottom:84px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:var(--sec) 0}
.section-tight{padding:calc(var(--sec) * .62) 0}

/* ---------- 导航 ---------- */
.site-head{
  position:sticky;
  top:12px;
  z-index:900;
  padding:0 24px;
  margin-bottom:16px;
}
.nav-panel{
  max-width:1240px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:16px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--c-line);
  border-radius:22px;
  padding:10px 14px;
  box-shadow:var(--sh-1);
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:28px;height:28px;
  display:grid;place-items:center;
  background:var(--c-ink);
  color:var(--c-accent);
  border-radius:9px;
  font-size:15px;font-weight:800;
  line-height:1;
}
.logo-text{display:flex;align-items:baseline;gap:2px;font-size:15px;line-height:1.2;white-space:nowrap}
.logo-text b{font-weight:800;letter-spacing:-.02em}
.logo-text span{font-weight:500;color:var(--c-muted);font-size:14px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;
  border-radius:12px;
  font-size:14px;
  font-weight:500;
  color:var(--c-ink-2);
  white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{background:var(--c-paper);color:var(--c-ink)}
.nav-link:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}
.nav-link.active{background:var(--c-tint);color:var(--c-ink);font-weight:700}
.nav-link.active::after{
  content:"";position:absolute;
  left:14px;right:14px;bottom:5px;height:2px;
  background:var(--c-accent);border-radius:2px;
}
.nav-cta{flex:0 0 auto}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1.5px solid var(--c-ink);
  border-radius:12px;
  background:transparent;
  margin-left:auto;
  padding:0;
  align-items:center;justify-content:center;
  flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px}
.nav-toggle:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}

/* 抽屉 */
.offcanvas.drawer{
  background:var(--c-surface);
  border-radius:22px 0 0 22px;
  width:min(320px,86vw);
  padding:22px;
}
.drawer .logo{margin-bottom:18px}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-nav .nav-link{height:44px;padding:0 16px;font-size:15px;justify-content:flex-start;border-radius:14px;background:var(--c-paper)}
.drawer-nav .nav-link.active{background:var(--c-tint)}
.drawer-nav .nav-link.active::after{left:16px;right:auto;width:22px;bottom:8px}
.drawer-cta{margin-top:22px;display:block}
.drawer-cta .btn{width:100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .18s var(--ease);
}
.btn:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}
.btn-ink{background:var(--c-ink);color:var(--c-paper)}
.btn-ink:hover{background:var(--c-accent);color:var(--c-accent-ink)}
.btn-ink .arw{transition:transform .22s var(--ease)}
.btn-ink:hover .arw{transform:translateX(4px)}
.btn-ink:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--c-ink);color:var(--c-ink)}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-block{width:100%}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--c-tint);
  color:var(--c-ink);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.tag-accent{background:var(--c-accent);color:var(--c-accent-ink)}
.tag-dark{background:rgba(255,255,255,.10);color:var(--c-paper)}

/* ---------- 页头 ---------- */
.page-head{padding:24px 0 0}
.crumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--c-muted);
  margin-bottom:26px;
}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-ink)}
.crumb .sep{opacity:.6}
.crumb-cur{color:var(--c-ink);font-weight:600}
.head-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
  padding-bottom:calc(var(--sec) * .58);
}
.eyebrow{margin-bottom:16px}
.page-head h1{
  font-size:clamp(32px,4.2vw,54px);
  line-height:1.06;
  letter-spacing:-.03em;
  font-weight:800;
  margin-bottom:18px;
}
.lede{
  font-size:17px;
  color:var(--c-ink-2);
  max-width:34em;
  margin-bottom:26px;
}
.head-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}
.head-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--c-muted);
}
.head-meta li{display:inline-flex;align-items:center;gap:10px}
.head-meta li + li::before{content:"·";color:var(--c-line);font-weight:700}
.head-media{position:relative}
.head-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-big);
  border:1px solid var(--c-line);
  box-shadow:var(--sh-1);
  background:var(--c-tint);
}
.media-badge{
  position:absolute;
  left:-14px;bottom:-14px;
  background:var(--c-ink);
  color:var(--c-paper);
  border-radius:18px;
  padding:14px 18px;
  display:flex;gap:22px;
  box-shadow:var(--sh-2);
}
.media-badge .mb-item b{
  display:block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:22px;line-height:1.1;
  color:var(--c-accent);
}
.media-badge .mb-item span{font-size:11px;color:rgba(245,243,238,.66);letter-spacing:.04em}

/* ---------- 准备提示三卡 ---------- */
.prep-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.prep-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:26px 24px;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.prep-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(15,18,22,.22)}
.prep-ico{
  width:40px;height:40px;border-radius:12px;
  background:var(--c-tint);
  display:grid;place-items:center;
  margin-bottom:16px;
}
.prep-ico svg{width:22px;height:22px;stroke:var(--c-ink);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.prep-card h3{font-size:18px;font-weight:700;margin-bottom:8px;letter-spacing:0}
.prep-card p{font-size:14px;color:var(--c-muted);line-height:1.75}

/* ---------- 主栅格 8/4 ---------- */
.main-grid{
  display:grid;
  grid-template-columns:minmax(0,2fr) minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.block-head{margin-bottom:34px}
.block-head h2{
  font-size:clamp(26px,2.6vw,34px);
  line-height:1.2;
  margin-bottom:12px;
}
.block-head p{color:var(--c-muted);font-size:15px;max-width:40em}
.sec-kicker{
  font-family:var(--font-num);
  font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-muted);
  margin-bottom:10px;
  display:block;
}

/* 步骤流 */
.steps{position:relative}
.step{
  display:grid;
  grid-template-columns:88px minmax(0,1fr);
  gap:26px;
  padding:30px 0;
  border-bottom:1px solid var(--c-line);
}
.step:first-child{padding-top:4px}
.step:last-child{border-bottom:0;padding-bottom:0}
.step-num{
  position:relative;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:40px;
  line-height:1;
  font-weight:700;
  color:var(--c-ink);
  letter-spacing:-.02em;
  padding-top:4px;
}
.step-num::after{
  content:"";position:absolute;left:2px;bottom:-12px;
  width:26px;height:3px;border-radius:2px;background:var(--c-accent);
}
.step-body h3{font-size:19px;font-weight:700;margin-bottom:8px;letter-spacing:0;line-height:1.4}
.step-body p{color:var(--c-ink-2);font-size:15px;line-height:1.8}
.step-note{
  display:inline-flex;align-items:flex-start;gap:8px;
  margin-top:12px;
  background:var(--c-tint);
  border-radius:12px;
  padding:10px 14px;
  font-size:13px;
  color:var(--c-ink-2);
  line-height:1.7;
}
.step-note b{font-weight:700;color:var(--c-ink);flex:0 0 auto}
.step-list{margin-top:12px;display:grid;gap:6px}
.step-list li{
  position:relative;
  padding-left:18px;
  font-size:14px;color:var(--c-muted);line-height:1.7;
}
.step-list li::before{
  content:"";position:absolute;left:2px;top:10px;
  width:6px;height:6px;border-radius:50%;
  background:var(--c-accent);
}

/* 侧栏 */
.side-col{display:flex;flex-direction:column;gap:24px;position:sticky;top:96px}
.side-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
}
.side-card h3{
  font-size:14px;font-weight:700;letter-spacing:.04em;
  color:var(--c-muted);
  text-transform:uppercase;
  margin-bottom:14px;
  font-family:var(--font-num);
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;
  border-radius:10px;
  font-size:14px;
  color:var(--c-ink-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.toc-list a span{
  font-family:var(--font-num);
  font-size:12px;color:var(--c-muted);
  flex:0 0 20px;
}
.toc-list a:hover{background:var(--c-paper);color:var(--c-ink)}
.toc-list a:hover span{color:var(--c-ink)}
.toc-list a:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.side-dark{
  background:var(--c-ink);
  color:var(--c-paper);
  border:0;
  border-radius:var(--r-card);
  padding:26px 24px;
  box-shadow:var(--sh-2);
}
.side-dark h3{color:rgba(245,243,238,.6);font-family:var(--font-num)}
.side-dark p{font-size:15px;line-height:1.75;color:#EDEAE1;margin-bottom:18px}
.side-dark .btn{
  background:var(--c-accent);
  color:var(--c-accent-ink);
  width:100%;
}
.side-dark .btn:hover{background:var(--c-paper);color:var(--c-ink)}
.side-facts{display:grid;gap:12px;margin-bottom:20px}
.side-facts div{display:flex;align-items:baseline;justify-content:space-between;gap:10px;border-bottom:1px dashed rgba(245,243,238,.18);padding-bottom:10px}
.side-facts b{font-family:var(--font-num);font-size:20px;color:var(--c-accent);font-variant-numeric:tabular-nums}
.side-facts span{font-size:12px;color:rgba(245,243,238,.66)}

/* 卡点卡 */
.issue-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.issue-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-left:3px solid var(--c-accent);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.issue-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.issue-card h3{font-size:17px;font-weight:700;margin-bottom:10px;letter-spacing:0;line-height:1.45}
.issue-card p{font-size:14px;color:var(--c-muted);line-height:1.75}
.issue-card .tag{margin-bottom:14px}

/* 快速答疑 */
.qa-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.qa-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
}
.qa-item h3{
  font-size:16px;font-weight:700;letter-spacing:0;
  margin-bottom:10px;
  display:flex;gap:10px;align-items:flex-start;line-height:1.5;
}
.qa-item h3::before{
  content:"Q";font-family:var(--font-num);
  color:var(--c-ink);background:var(--c-accent);
  width:22px;height:22px;border-radius:7px;
  display:grid;place-items:center;
  font-size:12px;font-weight:700;flex:0 0 auto;margin-top:2px;
}
.qa-item p{font-size:14px;color:var(--c-muted);line-height:1.8}

/* 相关分类 */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  display:block;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(15,18,22,.22)}
.rel-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--c-tint);
}
.rel-body{padding:20px 22px 22px}
.rel-body h3{font-size:17px;font-weight:700;margin-bottom:6px;letter-spacing:0;line-height:1.45}
.rel-body p{font-size:13px;color:var(--c-muted);line-height:1.7}
.rel-card:hover h3{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}

/* CTA 大卡 */
.cta-band{
  background:var(--c-ink);
  color:var(--c-paper);
  border-radius:var(--r-big);
  padding:44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-band h2{
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.25;
  margin-bottom:10px;
  letter-spacing:-.02em;
}
.cta-band p{color:rgba(245,243,238,.72);font-size:15px;max-width:36em}
.cta-band .btn{
  background:var(--c-accent);
  color:var(--c-accent-ink);
  flex:0 0 auto;
}
.cta-band .btn:hover{background:var(--c-paper);color:var(--c-ink)}

/* ---------- 页脚 ---------- */
.site-foot{
  background:var(--c-ink);
  color:var(--c-paper);
  border-radius:24px 24px 0 0;
  margin-top:calc(var(--sec) * .8);
  padding:64px 0 28px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .8fr 1fr;
  gap:40px;
  padding-bottom:40px;
}
.foot-brand .logo{margin-bottom:16px}
.foot-brand .logo-mark{background:var(--c-accent);color:var(--c-ink)}
.foot-brand .logo-text{color:var(--c-paper)}
.foot-brand .logo-text span{color:rgba(245,243,238,.6)}
.foot-desc{font-size:14px;color:rgba(245,243,238,.66);line-height:1.75;max-width:22em;margin-bottom:14px}
.foot-domain{
  font-family:var(--font-num);
  font-size:13px;letter-spacing:.06em;
  color:rgba(245,243,238,.5);
}
.foot-h{font-size:14px;font-weight:700;margin-bottom:14px;color:var(--c-paper)}
.foot-list{display:grid;gap:10px}
.foot-list a{font-size:14px;color:rgba(245,243,238,.68)}
.foot-list a:hover{color:var(--c-accent)}
.foot-contact{font-size:14px;color:rgba(245,243,238,.68);line-height:1.9}
.foot-contact b{color:var(--c-paper);font-weight:600}
.foot-bottom{
  border-top:1px solid rgba(245,243,238,.14);
  padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(245,243,238,.5);
}

/* ---------- 固定转化条 ---------- */
.dock{
  position:fixed;
  right:24px;bottom:24px;
  z-index:950;
  display:flex;align-items:center;gap:14px;
  max-width:360px;
  background:var(--c-ink);
  color:var(--c-paper);
  border-radius:var(--r-pill);
  padding:10px 10px 10px 22px;
  box-shadow:var(--sh-2);
  opacity:0;
  transform:translateY(8px);
  pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.dock.show{opacity:1;transform:translateY(0);pointer-events:auto}
.dock span{font-size:13px;line-height:1.5;color:rgba(245,243,238,.86)}
.dock .btn{
  background:var(--c-accent);color:var(--c-accent-ink);
  height:38px;padding:0 18px;font-size:13px;flex:0 0 auto;
}
.dock .btn:hover{background:var(--c-paper);color:var(--c-ink)}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (max-width:1399.98px){
  .wrap{padding:0 24px}
}
@media (max-width:1199.98px){
  .head-grid{gap:36px}
  .main-grid{gap:36px}
  .prep-grid,.issue-grid,.rel-grid{gap:20px}
  .cta-band{padding:36px}
}
@media (max-width:991.98px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .head-grid{grid-template-columns:1fr;gap:32px;padding-bottom:calc(var(--sec) * .5)}
  .head-media{order:2}
  .media-badge{left:12px;bottom:-14px}
  .main-grid{grid-template-columns:1fr;gap:36px}
  .side-col{position:static;top:auto;flex-direction:row;flex-wrap:wrap}
  .side-card,.side-dark{flex:1 1 280px}
  .prep-grid,.issue-grid,.rel-grid{grid-template-columns:1fr 1fr}
  .qa-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  :root{--sec:72px}
}
@media (max-width:767.98px){
  .prep-grid,.issue-grid,.rel-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px}
  .cta-band .btn{width:100%}
  .head-actions{width:100%}
  .head-actions .btn{width:100%}
  .step{grid-template-columns:60px minmax(0,1fr);gap:16px;padding:24px 0}
  .step-num{font-size:32px}
  .step-num::after{bottom:-8px;width:20px}
  .dock{
    right:0;left:0;bottom:0;
    max-width:none;
    border-radius:0;
    padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  }
  .dock span{font-size:12px;flex:1 1 auto}
  body{padding-bottom:76px}
}
@media (max-width:575.98px){
  .wrap{padding:0 18px}
  .site-head{padding:0 12px}
  .nav-panel{border-radius:18px;padding:8px 10px}
  .logo-text{font-size:14px}
  .logo-text span{font-size:13px}
  .page-head h1{font-size:32px}
  .lede{font-size:15px}
  .prep-card,.side-card,.side-dark,.issue-card,.qa-item{padding:20px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-bottom{flex-direction:column;gap:8px}
  .media-badge{padding:12px 14px;gap:16px}
  .media-badge .mb-item b{font-size:18px}
  .dock{gap:10px;padding-left:16px}
  .dock .btn{height:36px;padding:0 14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --c-ink:#0F1216;
  --c-ink-2:#1B2027;
  --c-paper:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-line:#E2DED4;
  --c-muted:#6C7278;
  --c-accent:#C6F24E;
  --c-accent-ink:#0F1216;
  --c-tint:#EDEAE1;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"DIN Alternate","Helvetica Neue",ui-monospace,monospace;
  --r-card:20px;
  --r-big:24px;
  --r-pill:999px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(15,18,22,.04),0 14px 30px -20px rgba(15,18,22,.20);
  --sh-2:0 2px 4px rgba(15,18,22,.06),0 24px 44px -24px rgba(15,18,22,.28);
  --sp-sec:96px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-primary:#C6F24E;
  --bs-body-color:#0F1216;
  --bs-body-bg:#F5F3EE;
  --bs-border-radius:20px;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  color:var(--c-ink);
  background:var(--c-paper);
  padding-bottom:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease)}
a:hover{color:var(--c-ink-2)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:6px}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px;width:100%}
.sec{padding:var(--sp-sec) 0}
.sec-tight{padding:64px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c-muted);margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-ink);display:block}
.badge-tag{
  display:inline-block;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--c-tint);color:var(--c-ink);
  font-size:12px;font-weight:600;line-height:1.5;
}
.badge-tag.accent{background:var(--c-accent);color:var(--c-accent-ink)}

/* ---------- buttons ---------- */
.btn-ink,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1.5px solid transparent;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .12s var(--ease),box-shadow .22s var(--ease);
}
.btn-ink{background:var(--c-ink);color:var(--c-paper)}
.btn-ink .arw{transition:transform .22s var(--ease)}
.btn-ink:hover{background:var(--c-accent);color:var(--c-accent-ink)}
.btn-ink:hover .arw{transform:translateX(4px)}
.btn-ink:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:var(--c-ink)}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 20px;font-size:13.5px}
.btn-block{width:100%}

/* ---------- header / nav ---------- */
.site-head{
  position:sticky;top:12px;z-index:1030;
  padding:12px 0 0;
}
.nav-card{
  display:flex;align-items:center;gap:18px;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--c-line);
  border-radius:22px;
  box-shadow:var(--sh-1);
  padding:10px 12px 10px 16px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:28px;height:28px;border-radius:8px;background:var(--c-ink);color:var(--c-accent);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;line-height:1;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-size:15px;font-weight:800;letter-spacing:-.01em}
.logo-text span{font-size:11.5px;font-weight:500;color:var(--c-muted);letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;border-radius:12px;
  font-size:13.5px;font-weight:500;color:var(--c-ink-2);
  position:relative;white-space:nowrap;
}
.nav-link:hover{background:var(--c-paper);color:var(--c-ink)}
.nav-link.active{background:var(--c-tint);font-weight:700;color:var(--c-ink)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;
  background:var(--c-accent);border-radius:2px;
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 20px;border-radius:var(--r-pill);
  background:var(--c-ink);color:var(--c-paper);
  font-size:13.5px;font-weight:600;flex:0 0 auto;
  transition:background-color .22s var(--ease),color .22s var(--ease);
}
.nav-cta:hover{background:var(--c-accent);color:var(--c-accent-ink)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);
  align-items:center;justify-content:center;margin-left:auto;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--c-ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--c-ink);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.offcanvas.drawer{background:var(--c-paper);border-left:1px solid var(--c-line);border-radius:22px 0 0 22px;max-width:86vw}
.drawer .offcanvas-header{border-bottom:1px solid var(--c-line);padding:18px 20px}
.drawer .offcanvas-body{padding:16px 12px 22px;display:flex;flex-direction:column;height:100%}
.drawer .nav-link{height:46px;padding:0 16px;border-radius:14px;font-size:15px;width:100%}
.drawer .nav-link.active::after{left:16px;right:16px;bottom:6px}
.drawer-foot{margin-top:auto;padding:16px 8px 0}
.drawer-foot .btn-ink{width:100%}

/* ---------- page hero ---------- */
.page-hero{padding:44px 0 0}
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--c-muted);margin-bottom:26px;
}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-ink)}
.crumb .sep{opacity:.5}
.crumb .now{color:var(--c-ink);font-weight:600}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.page-hero h1{
  font-size:clamp(32px,3.6vw,50px);
  line-height:1.08;letter-spacing:-.03em;font-weight:800;
  margin:14px 0 18px;
}
.page-hero h1 em{font-style:normal;position:relative;white-space:nowrap}
.page-hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:10px;
  background:var(--c-accent);z-index:-1;border-radius:3px;
}
.hero-sub{font-size:17px;color:var(--c-ink-2);max-width:520px;line-height:1.8}
.hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.hero-trust{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:26px;font-size:13px;color:var(--c-muted)}
.hero-trust i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:inline-block;font-style:normal}
.hero-media{position:relative}
.hero-media .shot{
  border-radius:var(--r-big);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-2);aspect-ratio:4/3;background:var(--c-tint);
}
.hero-media .shot img{width:100%;height:100%;object-fit:cover}
.hero-media .stat-float{
  position:absolute;left:-22px;bottom:24px;
  background:var(--c-ink);color:var(--c-paper);
  border-radius:18px;padding:16px 20px;display:flex;gap:24px;
  box-shadow:var(--sh-2);
}
.hero-media .stat-float .n{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:24px;font-weight:700;line-height:1.1;color:var(--c-accent)}
.hero-media .stat-float .t{font-size:11.5px;color:rgba(245,243,238,.72);margin-top:2px}

/* ---------- status strip ---------- */
.status-strip{
  margin-top:44px;
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;
}
.status-strip .cell{padding:22px 24px;border-right:1px solid var(--c-line)}
.status-strip .cell:last-child{border-right:0}
.status-strip .n{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;line-height:1.1;letter-spacing:-.02em}
.status-strip .n small{font-size:14px;font-weight:600;margin-left:2px;color:var(--c-muted)}
.status-strip .t{font-size:12.5px;color:var(--c-muted);margin-top:4px}

/* ---------- section head ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(26px,2.6vw,34px);line-height:1.2;letter-spacing:-.02em}
.sec-head p{color:var(--c-muted);font-size:14.5px;max-width:520px;margin-top:10px}
.sec-head .link-more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.sec-head .link-more:hover{color:var(--c-ink-2)}
.sec-head .link-more .arw{transition:transform .22s var(--ease)}
.sec-head .link-more:hover .arw{transform:translateX(4px)}

/* ---------- alternating rows ---------- */
.alt-row{
  display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;
  padding:44px 0;
}
.alt-row + .alt-row{border-top:1px solid var(--c-line)}
.alt-row.flip{grid-template-columns:7fr 5fr}
.alt-row.flip .alt-media{order:2}
.alt-row.flip .alt-body{order:1}
.alt-media .frame{
  border-radius:20px;overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-1);aspect-ratio:16/11;background:var(--c-tint);
}
.alt-media .frame img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.alt-media .frame:hover img{transform:scale(1.03)}
.alt-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--c-muted);
  display:flex;align-items:center;gap:10px;margin-bottom:14px;
}
.alt-num::after{content:"";flex:1;height:1px;background:var(--c-line);max-width:120px}
.alt-body h3{font-size:clamp(22px,2.1vw,27px);line-height:1.28;margin-bottom:14px;letter-spacing:-.02em}
.alt-body p{
  color:var(--c-ink-2);font-size:15.5px;line-height:1.9;
  padding-left:16px;border-left:2px solid var(--c-accent);
}
.alt-body p + p{margin-top:14px}
.alt-list{margin-top:20px;display:grid;gap:10px}
.alt-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14.5px;color:var(--c-ink-2);line-height:1.7;
}
.alt-list li svg{flex:0 0 18px;margin-top:4px;color:var(--c-ink)}

/* ---------- dark panel ---------- */
.dark-panel{
  background:var(--c-ink);color:var(--c-paper);
  border-radius:var(--r-big);padding:40px;position:relative;overflow:hidden;
}
.dark-panel::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border-radius:50%;background:rgba(198,242,78,.10);
}
.dark-panel .dp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;position:relative}
.dark-panel h3{font-size:18px;margin:12px 0 8px;color:var(--c-paper)}
.dark-panel p{font-size:14px;color:rgba(245,243,238,.72);line-height:1.8}
.dark-panel .dp-ico{
  width:38px;height:38px;border-radius:12px;background:rgba(245,243,238,.08);
  display:inline-flex;align-items:center;justify-content:center;color:var(--c-accent);
}
.dark-panel .dp-flag{
  display:inline-block;font-family:var(--font-num);font-size:12px;font-weight:700;
  letter-spacing:.16em;color:var(--c-accent);margin-bottom:8px;
}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-aside h2{font-size:clamp(26px,2.6vw,34px);line-height:1.2;margin-bottom:14px}
.faq-aside p{color:var(--c-muted);font-size:14.5px}
.faq-aside .btn-ghost{margin-top:22px}
.accordion.faq-custom .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--c-line);border-radius:0;
}
.accordion.faq-custom .accordion-button{
  background:transparent;box-shadow:none;border:0;border-radius:0;
  padding:20px 40px 20px 0;font-size:16px;font-weight:600;color:var(--c-ink);
  line-height:1.6;position:relative;
}
.accordion.faq-custom .accordion-button:not(.collapsed){color:var(--c-ink);background:transparent;box-shadow:none}
.accordion.faq-custom .accordion-button:hover{color:var(--c-ink-2)}
.accordion.faq-custom .accordion-button::after{
  content:"";position:absolute;right:8px;top:50%;
  width:12px;height:12px;margin:0;transform:translateY(-50%);
  background:none;border-right:2px solid var(--c-ink);border-bottom:2px solid var(--c-ink);
  border-radius:0;transform:translateY(-70%) rotate(45deg);
  transition:transform .2s var(--ease);
  background-image:none;
}
.accordion.faq-custom .accordion-button:not(.collapsed)::after{
  transform:translateY(-30%) rotate(-135deg);
}
.accordion.faq-custom .accordion-body{
  padding:0 40px 22px 0;font-size:14.5px;line-height:1.9;color:var(--c-ink-2);
}

/* ---------- related categories ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  display:flex;flex-direction:column;gap:8px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
  position:relative;overflow:hidden;
}
.rel-card::before{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;background:var(--c-accent);
  opacity:0;transition:opacity .22s var(--ease);
}
.rel-card:hover{transform:translateY(-3px);border-color:rgba(15,18,22,.22);box-shadow:var(--sh-2)}
.rel-card:hover::before{opacity:1}
.rel-card .idx{font-family:var(--font-num);font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--c-muted)}
.rel-card h3{font-size:18px;font-weight:700;letter-spacing:-.01em}
.rel-card p{font-size:13.5px;color:var(--c-muted);line-height:1.75}
.rel-card .go{font-size:13px;font-weight:600;display:inline-flex;align-items:center;gap:6px;margin-top:6px}
.rel-card:hover .go{color:var(--c-ink)}
.rel-card .go .arw{transition:transform .22s var(--ease)}
.rel-card:hover .go .arw{transform:translateX(4px)}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--c-ink);color:var(--c-paper);
  border-radius:var(--r-big);padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-40px;bottom:-70px;width:240px;height:240px;
  border-radius:50%;background:rgba(198,242,78,.08);
}
.cta-band h2{font-size:clamp(24px,2.4vw,32px);line-height:1.25;max-width:560px;position:relative}
.cta-band p{font-size:14.5px;color:rgba(245,243,238,.72);margin-top:10px;position:relative}
.cta-band .btn-light-pill{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:52px;padding:0 30px;border-radius:var(--r-pill);
  background:var(--c-paper);color:var(--c-ink);font-weight:600;font-size:15px;
  flex:0 0 auto;position:relative;
  transition:background-color .22s var(--ease),color .22s var(--ease);
}
.cta-band .btn-light-pill:hover{background:var(--c-accent);color:var(--c-accent-ink)}

/* ---------- sticky conversion bar ---------- */
.sticky-bar{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;align-items:center;gap:14px;
  background:var(--c-ink);color:var(--c-paper);
  border-radius:var(--r-pill);padding:10px 10px 10px 20px;
  box-shadow:0 18px 40px -18px rgba(15,18,22,.55);
  max-width:360px;
  opacity:0;transform:translateY(8px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.sticky-bar.show{opacity:1;transform:translateY(0);pointer-events:auto}
.sticky-bar .txt{font-size:13px;font-weight:500;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sticky-bar .go{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-pill);
  background:var(--c-accent);color:var(--c-accent-ink);font-size:13px;font-weight:700;flex:0 0 auto;
}
.sticky-bar .go:hover{background:var(--c-paper)}

/* ---------- footer ---------- */
.site-foot{
  background:var(--c-ink);color:var(--c-paper);
  border-radius:var(--r-big) var(--r-big) 0 0;
  padding:64px 0 26px;margin-top:var(--sp-sec);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand .logo{margin-bottom:16px}
.foot-brand .logo-mark{background:var(--c-accent);color:var(--c-ink)}
.foot-brand .logo-text b{color:var(--c-paper)}
.foot-brand .logo-text span{color:rgba(245,243,238,.6)}
.foot-desc{font-size:14px;color:rgba(245,243,238,.72);line-height:1.8;max-width:280px}
.foot-domain{
  margin-top:14px;font-family:var(--font-num);font-size:12.5px;letter-spacing:.06em;
  color:rgba(245,243,238,.5);
}
.foot-h{font-size:13px;font-weight:700;letter-spacing:.08em;margin-bottom:16px;color:var(--c-accent)}
.foot-list{display:grid;gap:10px}
.foot-list a{font-size:14px;color:rgba(245,243,238,.78)}
.foot-list a:hover{color:var(--c-accent)}
.foot-contact{font-size:14px;color:rgba(245,243,238,.78);line-height:1.9}
.foot-contact b{color:var(--c-paper);font-weight:600}
.foot-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(245,243,238,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(245,243,238,.52);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- breakpoints ---------- */
@media (max-width:1199px){
  :root{--sp-sec:80px}
  .hero-grid{gap:36px}
  .alt-row{gap:40px}
  .status-strip .cell{padding:20px}
}
@media (max-width:991px){
  :root{--sp-sec:72px}
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media .stat-float{left:16px;bottom:16px;padding:12px 16px;gap:18px}
  .status-strip{grid-template-columns:repeat(2,1fr)}
  .status-strip .cell:nth-child(2){border-right:0}
  .status-strip .cell:nth-child(1),.status-strip .cell:nth-child(2){border-bottom:1px solid var(--c-line)}
  .alt-row,.alt-row.flip{grid-template-columns:1fr;gap:26px;padding:34px 0}
  .alt-row.flip .alt-media{order:0}
  .alt-row.flip .alt-body{order:1}
  .dark-panel .dp-grid{grid-template-columns:1fr;gap:24px}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .rel-grid{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px}
  .cta-band .btn-light-pill{width:100%}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-foot{border-radius:20px 20px 0 0;padding-top:52px}
}
@media (max-width:767px){
  :root{--sp-sec:60px}
  .wrap{padding:0 18px}
  .sec-tight{padding:44px 0}
  .page-hero{padding-top:26px}
  .crumb{font-size:12.5px;margin-bottom:18px}
  .page-hero h1{font-size:clamp(28px,7.4vw,36px)}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn-ink,.hero-actions .btn-ghost{width:100%}
  .rel-grid{grid-template-columns:1fr}
  .dark-panel{padding:28px 22px}
  .accordion.faq-custom .accordion-button{font-size:15px;padding-right:34px}
  .accordion.faq-custom .accordion-body{padding-right:0}
  .sticky-bar{
    left:0;right:0;bottom:0;max-width:none;border-radius:22px 22px 0 0;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom,0px)) 18px;
    justify-content:space-between;
  }
  .sticky-bar .txt{font-size:12.5px}
  body{padding-bottom:84px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;gap:6px;font-size:12px}
}
@media (max-width:519px){
  .page-hero h1{font-size:30px}
  .status-strip{grid-template-columns:1fr}
  .status-strip .cell{border-right:0;border-bottom:1px solid var(--c-line)}
  .status-strip .cell:last-child{border-bottom:0}
  .sec-head{margin-bottom:30px}
  .ca-band h2,.cta-band h2{font-size:22px}
  .rel-card{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --c-ink:#0F1216;
  --c-ink-2:#1B2027;
  --c-paper:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-line:#E2DED4;
  --c-muted:#6C7278;
  --c-accent:#C6F24E;
  --c-accent-ink:#0F1216;
  --c-tint:#EDEAE1;
  --r-sm:12px;
  --r-card:20px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,18,22,.04), 0 14px 30px -20px rgba(15,18,22,.20);
  --sh-2:0 1px 2px rgba(15,18,22,.06), 0 24px 48px -24px rgba(15,18,22,.30);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
  --font-num:"DIN Alternate","Helvetica Neue",ui-monospace,monospace;
  --bs-primary:#0F1216;
  --bs-body-color:#1B2027;
  --bs-body-bg:#F5F3EE;
  --bs-border-radius:16px;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
  --bs-link-color:#0F1216;
  --bs-link-hover-color:#0F1216;
  --bs-body-font-size:16px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink-2);
  background:var(--c-paper);
  padding-bottom:84px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink);line-height:1.2;}
h1{font-size:clamp(32px,4vw,54px);font-weight:800;letter-spacing:-.03em;line-height:1.12;}
h2{font-size:clamp(26px,2.6vw,34px);font-weight:800;letter-spacing:-.02em;line-height:1.2;}
h3{font-size:20px;font-weight:700;}
p{margin:0;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
img{display:block;max-width:100%;}
ul,ol{list-style:none;margin:0;padding:0;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:8px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- header / nav ---------- */
.site-head{position:sticky;top:12px;z-index:1030;padding:12px 16px 0;}
.nav-card{
  max-width:1240px;margin:0 auto;
  display:flex;align-items:center;gap:16px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--c-line);
  border-radius:22px;
  box-shadow:var(--sh-1);
  padding:10px 14px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:28px;height:28px;border-radius:8px;background:var(--c-ink);color:var(--c-accent);
  display:grid;place-items:center;font-size:15px;font-weight:800;line-height:1;
}
.logo-text{display:inline-flex;align-items:baseline;gap:5px;font-size:15px;color:var(--c-ink);white-space:nowrap;}
.logo-text b{font-weight:800;letter-spacing:-.01em;}
.logo-text span{font-weight:500;color:var(--c-muted);font-size:13.5px;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  height:38px;display:inline-flex;align-items:center;padding:0 14px;border-radius:12px;
  font-size:13.5px;font-weight:600;color:var(--c-ink-2);white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-link:hover{background:var(--c-paper);color:var(--c-ink);}
.nav-link.active{background:var(--c-tint);color:var(--c-ink);box-shadow:inset 0 -2px 0 var(--c-accent);}
.nav-cta{
  height:40px;padding:0 20px;border-radius:var(--r-pill);background:var(--c-ink);color:var(--c-paper);
  font-size:13.5px;font-weight:600;display:inline-flex;align-items:center;gap:8px;border:0;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.nav-cta svg{transition:transform .22s var(--ease);}
.nav-cta:hover{background:var(--c-accent);color:var(--c-accent-ink);}
.nav-cta:hover svg{transform:translateX(3px);}
.nav-cta:active{transform:translateY(1px);}
.nav-toggle{
  display:none;margin-left:auto;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-ink);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--c-paper);}

/* ---------- offcanvas ---------- */
.offcanvas{background:var(--c-paper);border-left:1px solid var(--c-line);}
.offcanvas.offcanvas-end{border-radius:24px 0 0 24px;}
.offcanvas-header{padding:20px 22px;border-bottom:1px solid var(--c-line);}
.offcanvas-title{font-size:15px;font-weight:800;color:var(--c-ink);letter-spacing:.02em;}
.offcanvas-body{padding:20px 22px;display:flex;flex-direction:column;gap:20px;}
.oc-links{display:flex;flex-direction:column;gap:8px;}
.oc-links a{
  padding:14px 16px;border-radius:14px;font-size:14.5px;font-weight:600;color:var(--c-ink);
  background:var(--c-surface);border:1px solid var(--c-line);
}
.oc-links a:hover{background:var(--c-paper);}
.oc-links a.active{background:var(--c-tint);box-shadow:inset 0 -2px 0 var(--c-accent);}
.oc-cta{margin-top:auto;width:100%;}

/* ---------- buttons ---------- */
.btn-ink{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  background:var(--c-ink);color:var(--c-paper);font-size:15px;font-weight:600;border:0;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-ink svg{transition:transform .22s var(--ease);flex:0 0 auto;}
.btn-ink:hover{background:var(--c-accent);color:var(--c-accent-ink);box-shadow:0 14px 28px -18px rgba(15,18,22,.5);}
.btn-ink:hover svg{transform:translateX(4px);}
.btn-ink:active{transform:translateY(1px);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  border:1.5px solid var(--c-ink);background:transparent;color:var(--c-ink);
  font-size:15px;font-weight:600;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper);}
.btn-ghost:active{transform:translateY(1px);}
.btn-light{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  background:var(--c-paper);color:var(--c-ink);font-size:15px;font-weight:600;border:0;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.btn-light:hover{background:var(--c-accent);color:var(--c-accent-ink);}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--c-tint);color:var(--c-ink);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.tag.on-dark{background:var(--c-accent);color:var(--c-accent-ink);}

/* ---------- page head ---------- */
.page-head{padding:48px 0 0;}
.ph-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px;flex-wrap:wrap;}
.crumb a:hover{color:var(--c-ink);}
.crumb .sep{opacity:.55;}
.crumb .cur{color:var(--c-ink-2);font-weight:600;}
.ph-grid h1{margin-top:16px;}
.ph-sub{margin-top:16px;font-size:16.5px;color:var(--c-muted);max-width:520px;}
.ph-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap;}
.ph-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);background:var(--c-tint);}
.ph-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.ph-float{
  position:absolute;left:16px;bottom:16px;display:flex;gap:18px;
  background:rgba(15,18,22,.92);color:#fff;border-radius:16px;padding:14px 18px;
}
.ph-float b{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;display:block;line-height:1.1;}
.ph-float span{font-size:11.5px;color:rgba(255,255,255,.62);}

/* ---------- stats ---------- */
.stat-bar{
  margin-top:56px;display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
}
.stat{padding:24px 24px 22px;border-right:1px solid var(--c-line);}
.stat:last-child{border-right:0;}
.stat b{
  display:block;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:34px;font-weight:700;color:var(--c-ink);line-height:1.05;
}
.stat b em{font-family:var(--font-sans);font-style:normal;font-size:14px;font-weight:600;color:var(--c-muted);margin-left:4px;}
.stat span{display:block;margin-top:6px;font-size:12.5px;color:var(--c-muted);}

/* ---------- section ---------- */
.section{padding:96px 0 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.sec-head p{color:var(--c-muted);font-size:15px;margin-top:12px;max-width:660px;}
.sec-link{font-size:14px;font-weight:600;color:var(--c-ink);display:inline-flex;align-items:center;gap:6px;border-bottom:2px solid transparent;padding-bottom:2px;}
.sec-link:hover{border-bottom-color:var(--c-ink);}

/* ---------- pair compare ---------- */
.pair-legend{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:14px;}
.pair-legend span{display:flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;color:var(--c-muted);letter-spacing:.04em;}
.pair-legend span::before{content:"";width:8px;height:8px;border-radius:3px;background:var(--c-ink);}
.pair-legend span.is-b::before{background:var(--c-accent);}
.pair-list{display:flex;flex-direction:column;gap:16px;}
.pair-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch;}
.pair-card{
  display:flex;gap:16px;padding:24px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.pair-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(15,18,22,.22);}
.pair-no{
  flex:0 0 auto;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:22px;font-weight:700;color:var(--c-ink);line-height:1;padding-top:2px;
}
.pair-card h3{font-size:17px;margin-bottom:8px;}
.pair-card p{font-size:14.5px;color:var(--c-muted);line-height:1.75;}
.pair-card.is-b{
  background:var(--c-tint);border-color:transparent;box-shadow:inset 3px 0 0 var(--c-accent);
}
.pair-card.is-b:hover{box-shadow:inset 3px 0 0 var(--c-accent),var(--sh-2);border-color:transparent;}

/* ---------- dark prep ---------- */
.prep{
  margin-top:96px;background:var(--c-ink);border-radius:var(--r-lg);
  padding:48px;display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;
}
.prep h2{color:#fff;}
.prep .lead{color:rgba(255,255,255,.62);font-size:15px;margin-top:16px;max-width:340px;}
.prep-list{display:flex;flex-direction:column;}
.prep-item{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid rgba(255,255,255,.12);}
.prep-item:first-child{padding-top:0;}
.prep-item:last-child{border-bottom:0;padding-bottom:0;}
.prep-item .num{
  flex:0 0 auto;width:38px;height:38px;border-radius:12px;background:rgba(255,255,255,.08);
  display:grid;place-items:center;font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--c-accent);
}
.prep-item b{display:block;color:#fff;font-size:15.5px;font-weight:700;margin-bottom:4px;}
.prep-item p{color:rgba(255,255,255,.6);font-size:14px;line-height:1.7;}

/* ---------- split / account type ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2);background:var(--c-tint);}
.type-list{display:flex;flex-direction:column;gap:16px;margin-top:28px;}
.type-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.type-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(15,18,22,.22);}
.type-card .head{display:flex;align-items:center;gap:12px;margin-bottom:10px;flex-wrap:wrap;}
.type-card h3{font-size:17px;}
.type-card p{font-size:14.5px;color:var(--c-muted);}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-side p{color:var(--c-muted);font-size:15px;margin-top:14px;max-width:320px;}
.faq-side .btn-ghost{margin-top:24px;}
.acc{
  --bs-accordion-border-color:transparent;
  --bs-accordion-bg:transparent;
  --bs-accordion-btn-bg:transparent;
  --bs-accordion-active-bg:transparent;
  --bs-accordion-active-color:#0F1216;
  --bs-accordion-btn-color:#0F1216;
  --bs-accordion-btn-focus-box-shadow:none;
  --bs-accordion-border-radius:0;
  --bs-accordion-inner-border-radius:0;
}
.acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--c-line);border-radius:0;}
.acc .accordion-item:first-of-type{border-top:1px solid var(--c-line);}
.acc .accordion-button{
  padding:20px 0;background:transparent;box-shadow:none;border-radius:0;
  font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.5;
  transition:color .2s var(--ease);
}
.acc .accordion-button:hover{color:var(--c-ink-2);}
.acc .accordion-button:not(.collapsed){color:var(--c-ink);background:transparent;}
.acc .accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;
  font-size:22px;font-weight:400;line-height:1;color:var(--c-ink);
  display:flex;align-items:center;justify-content:center;
  transform:none;transition:transform .2s var(--ease),color .2s var(--ease);
}
.acc .accordion-button:not(.collapsed)::after{content:"−";transform:rotate(180deg);color:var(--c-ink);}
.acc .accordion-body{padding:0 0 22px;font-size:14.5px;color:var(--c-muted);line-height:1.8;max-width:720px;}

/* ---------- related categories ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(15,18,22,.22);}
.rel-block{
  height:84px;display:grid;place-items:center;
  font-size:17px;font-weight:800;color:var(--c-ink);background:var(--c-tint);letter-spacing:-.01em;
}
.rel-card.is-dark .rel-block{background:var(--c-ink);color:var(--c-accent);}
.rel-body{padding:18px 20px 20px;}
.rel-body p{font-size:13.5px;color:var(--c-muted);}
.rel-body .go{margin-top:12px;display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--c-ink);}
.rel-card:hover .go{color:var(--c-ink-2);}

/* ---------- cta ---------- */
.cta-box{
  margin-top:96px;background:var(--c-ink);border-radius:var(--r-lg);
  padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-box h2{color:#fff;font-size:clamp(24px,2.6vw,32px);max-width:620px;}
.cta-box p{color:rgba(255,255,255,.62);font-size:15px;margin-top:12px;max-width:560px;}

/* ---------- sticky cta ---------- */
.sticky-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;align-items:center;gap:16px;max-width:360px;
  background:var(--c-ink);color:#fff;border-radius:var(--r-pill);
  padding:10px 10px 10px 22px;
  box-shadow:0 18px 40px -18px rgba(15,18,22,.55);
  opacity:0;transform:translateY(8px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.sticky-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.sticky-cta p{font-size:13px;color:rgba(255,255,255,.78);line-height:1.35;}
.sticky-cta a{
  flex:0 0 auto;height:38px;padding:0 18px;border-radius:var(--r-pill);
  background:var(--c-accent);color:var(--c-accent-ink);
  font-size:13px;font-weight:700;display:inline-flex;align-items:center;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.sticky-cta a:hover{background:var(--c-paper);color:var(--c-ink);}

/* ---------- footer ---------- */
.site-foot{background:var(--c-ink);color:rgba(255,255,255,.72);margin-top:96px;border-radius:24px 24px 0 0;}
.site-foot .wrap{padding-top:64px;padding-bottom:24px;}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:40px;}
.site-foot .logo-mark{background:var(--c-accent);color:var(--c-ink);}
.site-foot .logo-text{color:#fff;}
.site-foot .logo-text span{color:rgba(255,255,255,.55);}
.foot-desc{margin-top:16px;font-size:13.5px;color:rgba(255,255,255,.6);max-width:280px;line-height:1.8;}
.foot-domain{margin-top:12px;font-family:var(--font-num);font-size:12.5px;color:rgba(255,255,255,.38);letter-spacing:.05em;}
.foot-h{font-size:13px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.03em;}
.foot-list li{margin-bottom:10px;}
.foot-list a{font-size:13.5px;color:rgba(255,255,255,.64);}
.foot-list a:hover{color:var(--c-accent);}
.foot-contact{font-size:13.5px;line-height:2;color:rgba(255,255,255,.6);}
.foot-contact b{color:#fff;font-weight:600;}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.42);
}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.in{opacity:1;transform:translateY(0);}

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

/* ---------- responsive ---------- */
@media (max-width:1399px){
  .prep{padding:44px;}
}
@media (max-width:1199px){
  .ph-grid{gap:36px;}
  .pair-row{gap:20px;}
  .prep{grid-template-columns:1fr;gap:32px;}
  .prep .lead{max-width:none;}
  .stat b{font-size:30px;}
  .foot-grid{grid-template-columns:1.6fr 1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .ph-grid{grid-template-columns:1fr;gap:32px;}
  .ph-sub{max-width:none;}
  .stat-bar{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--c-line);}
  .section{padding:72px 0 0;}
  .split{grid-template-columns:1fr;gap:32px;}
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
  .rel-grid{grid-template-columns:repeat(2,1fr);}
  .cta-box{flex-direction:column;align-items:flex-start;padding:36px;}
  .prep{padding:36px;}
  .site-foot{margin-top:72px;}
  .cta-box{margin-top:72px;}
  .prep{margin-top:72px;}
}
@media (max-width:767px){
  .wrap{padding:0 20px;}
  .site-head{padding:10px 12px 0;}
  .nav-card{border-radius:18px;padding:8px 12px;}
  .pair-legend{grid-template-columns:1fr;gap:8px;}
  .pair-row{grid-template-columns:1fr;gap:14px;}
  .rel-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;}
  .foot-bottom{flex-direction:column;gap:8px;}
  .section{padding:52px 0 0;}
  .prep,.cta-box{margin-top:52px;}
  .site-foot{margin-top:52px;}
  .stat{padding:20px 18px;}
}
@media (max-width:575px){
  h1{font-size:32px;}
  .ph-actions{flex-direction:column;align-items:stretch;}
  .ph-actions .btn-ink,.ph-actions .btn-ghost{width:100%;}
  .btn-light{width:100%;}
  .pair-card{padding:20px;gap:12px;}
  .type-card{padding:20px;}
  .prep,.cta-box{padding:26px 20px;}
  .foot-grid{grid-template-columns:1fr;}
  .sticky-cta{
    left:0;right:0;bottom:0;max-width:none;border-radius:0;
    padding:10px 16px;justify-content:space-between;
    box-shadow:0 -10px 30px -18px rgba(15,18,22,.5);
  }
  .sticky-cta p{font-size:12.5px;}
}

/* roulang page: category4 */
:root{
  --c-ink:#0F1216;
  --c-ink-2:#1B2027;
  --c-paper:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-line:#E2DED4;
  --c-muted:#6C7278;
  --c-accent:#C6F24E;
  --c-accent-ink:#0F1216;
  --c-tint:#EDEAE1;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
  --font-num:"DIN Alternate","Helvetica Neue",ui-monospace,monospace;
  --r-card:20px;
  --r-block:24px;
  --r-pill:999px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(15,18,22,.04),0 14px 30px -20px rgba(15,18,22,.20);
  --sh-2:0 2px 6px rgba(15,18,22,.06),0 22px 44px -24px rgba(15,18,22,.28);
  --t-fast:180ms cubic-bezier(.2,.7,.3,1);
  --t-mid:220ms cubic-bezier(.2,.7,.3,1);
  --sec:96px;
  --bs-primary:#0F1216;
  --bs-body-color:#0F1216;
  --bs-body-bg:#F5F3EE;
  --bs-border-radius:14px;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-paper);
  padding-bottom:84px;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-ink);text-decoration:none;transition:color var(--t-fast);}
a:hover{color:var(--c-ink-2);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:6px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  border:1.5px solid transparent;cursor:pointer;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast),box-shadow var(--t-fast);
  white-space:nowrap;
}
.btn-x .ar{transition:transform var(--t-fast);display:inline-block;}
.btn-x:hover .ar{transform:translateX(4px);}
.btn-ink{background:var(--c-ink);color:var(--c-paper);}
.btn-ink:hover{background:var(--c-accent);color:var(--c-accent-ink);}
.btn-ink:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--c-ink);color:var(--c-ink);}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-paper);}
.btn-ghost:active{transform:translateY(1px);}
.btn-paper{background:var(--c-paper);color:var(--c-ink);}
.btn-paper:hover{background:var(--c-accent);color:var(--c-accent-ink);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}

/* ---------- 导航 ---------- */
.site-head{position:sticky;top:12px;z-index:1030;padding:0 16px;}
.nav-card{
  max-width:1240px;margin:0 auto;
  display:flex;align-items:center;gap:18px;
  padding:10px 14px 10px 18px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--c-line);
  border-radius:22px;
  box-shadow:var(--sh-1);
}
.logo{display:inline-flex;align-items:center;gap:12px;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:grid;place-items:center;
  background:var(--c-ink);color:var(--c-accent);
  border-radius:11px;font-weight:800;font-size:19px;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:16px;font-weight:800;letter-spacing:-.01em;}
.logo-text span{font-size:12px;font-weight:500;color:var(--c-muted);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;border-radius:12px;
  font-size:14px;font-weight:600;color:var(--c-ink-2);
  position:relative;transition:background var(--t-fast),color var(--t-fast);
}
.nav-link:hover{background:var(--c-paper);color:var(--c-ink);}
.nav-link.active{background:var(--c-tint);color:var(--c-ink);}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--c-accent);border-radius:2px;
}
.nav-cta{margin-left:6px;flex-shrink:0;}
.nav-burger{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);
  align-items:center;justify-content:center;cursor:pointer;margin-left:auto;
}
.nav-burger span{display:block;width:18px;height:2px;background:var(--c-ink);position:relative;}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);}
.nav-burger span::before{top:-6px;}
.nav-burger span::after{top:6px;}
.offcanvas{background:var(--c-surface);}
.offcanvas.offcanvas-end{border-radius:22px 0 0 22px;border-left:1px solid var(--c-line);}
.oc-head{display:flex;align-items:center;justify-content:space-between;padding:20px 20px 12px;}
.oc-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--c-muted);text-transform:uppercase;}
.oc-body{padding:6px 16px 20px;display:flex;flex-direction:column;gap:6px;}
.oc-link{
  display:block;padding:13px 16px;border-radius:14px;font-size:15px;font-weight:600;
  background:var(--c-paper);border:1px solid transparent;
}
.oc-link.active{background:var(--c-tint);border-color:var(--c-line);box-shadow:inset 3px 0 0 var(--c-accent);}
.oc-link:hover{background:var(--c-tint);}
.oc-foot{margin-top:auto;padding:16px;border-top:1px solid var(--c-line);}
.oc-foot .btn-x{width:100%;}

/* ---------- 通用板块 ---------- */
.sec{padding:var(--sec) 0;}
.sec-tight{padding:72px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;
  color:var(--c-muted);text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-accent);border-radius:2px;}
.h2{font-size:clamp(26px,2.6vw,34px);line-height:1.2;letter-spacing:-.02em;font-weight:800;}
.lead-sm{font-size:15px;color:var(--c-muted);max-width:620px;}
.badge-x{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:var(--c-tint);color:var(--c-ink);
  font-size:12px;font-weight:600;line-height:1.5;
}
.badge-dark{background:var(--c-accent);color:var(--c-accent-ink);}

/* ---------- 面包屑 ---------- */
.crumb{padding:26px 0 0;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-ink);}
.crumb .sep{color:var(--c-line);}
.crumb .now{color:var(--c-ink);font-weight:600;max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 页头 ---------- */
.page-hero{padding:28px 0 8px;}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;}
.hero-h1{
  font-size:clamp(30px,3.6vw,48px);line-height:1.12;letter-spacing:-.03em;font-weight:800;
}
.hero-h1 em{font-style:normal;position:relative;white-space:nowrap;}
.hero-h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:8px;
  background:var(--c-accent);border-radius:4px;z-index:-1;
}
.hero-sub{margin-top:18px;font-size:16px;color:var(--c-muted);max-width:560px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;}
.hero-figure{
  position:relative;border-radius:var(--r-block);overflow:hidden;
  border:1px solid var(--c-line);box-shadow:var(--sh-1);
  aspect-ratio:4/3;background:var(--c-tint);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure figcaption{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(15,18,22,.86);color:var(--c-paper);
  border-radius:14px;padding:12px 16px;font-size:13px;line-height:1.6;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.hero-figure figcaption b{color:var(--c-accent);font-weight:700;}

/* ---------- 勾选清单 ---------- */
.check-panel{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-block);box-shadow:var(--sh-1);
  padding:36px;
}
.check-list{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;}
.check-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:18px 0;border-bottom:1px solid var(--c-line);
  transition:background var(--t-fast);
}
.check-list .check-item:nth-last-child(-n+2){border-bottom:0;}
.check-mark{
  flex:0 0 24px;width:24px;height:24px;border-radius:8px;
  background:var(--c-accent);color:var(--c-accent-ink);
  display:grid;place-items:center;margin-top:2px;
}
.check-mark svg{width:14px;height:14px;}
.check-text{font-size:15.5px;font-weight:500;line-height:1.65;}
.check-text small{display:block;font-size:13px;color:var(--c-muted);font-weight:400;margin-top:4px;}

/* ---------- 数据条 ---------- */
.stat-bar{
  background:var(--c-ink);color:var(--c-paper);
  border-radius:var(--r-block);padding:34px 36px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.stat-item{border-left:1px solid rgba(245,243,238,.16);padding-left:22px;}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:clamp(28px,3vw,38px);font-weight:700;line-height:1;color:var(--c-accent);
  letter-spacing:-.02em;
}
.stat-num span{font-size:15px;color:var(--c-paper);margin-left:6px;font-weight:500;letter-spacing:0;}
.stat-label{font-size:12.5px;color:rgba(245,243,238,.66);margin-top:10px;line-height:1.5;}

/* ---------- FAQ ---------- */
.faq-panel{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-block);box-shadow:var(--sh-1);padding:8px 32px;}
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-width:0;--bs-accordion-border-radius:0;--bs-accordion-inner-border-radius:0;}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--c-line);}
.accordion-item:last-child{border-bottom:0;}
.accordion-button{
  background:transparent;color:var(--c-ink);
  font-size:16px;font-weight:600;line-height:1.6;
  padding:20px 44px 20px 0;border-radius:0;box-shadow:none;
  transition:color var(--t-fast);
}
.accordion-button:hover{color:var(--c-ink-2);}
.accordion-button:not(.collapsed){background:transparent;color:var(--c-ink);box-shadow:none;}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;
  font-size:22px;font-weight:400;line-height:1;color:var(--c-ink);
  transform:none;transition:transform var(--t-mid);margin-left:auto;position:absolute;right:2px;
}
.accordion-button:not(.collapsed)::after{content:"+";transform:rotate(45deg);color:var(--c-ink);}
.accordion-body{padding:0 44px 22px 0;font-size:15px;line-height:1.85;color:var(--c-muted);}
.accordion-body b{color:var(--c-ink);font-weight:600;}

/* ---------- 相关分类 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t-mid),box-shadow var(--t-mid),border-color var(--t-mid);
  height:100%;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(15,18,22,.22);}
.rel-thumb{aspect-ratio:16/10;background:var(--c-tint);overflow:hidden;}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms cubic-bezier(.2,.7,.3,1);}
.rel-card:hover .rel-thumb img{transform:scale(1.04);}
.rel-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-body h3{font-size:18px;font-weight:700;letter-spacing:-.01em;}
.rel-body p{font-size:14px;color:var(--c-muted);line-height:1.7;}
.rel-more{margin-top:auto;font-size:13px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.rel-card:hover .rel-more{color:var(--c-ink);}

/* ---------- CTA ---------- */
.cta-block{
  background:var(--c-ink);color:var(--c-paper);
  border-radius:var(--r-block);padding:48px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-block h2{font-size:clamp(24px,2.4vw,32px);line-height:1.25;color:var(--c-paper);}
.cta-block p{margin-top:12px;font-size:15px;color:rgba(245,243,238,.68);max-width:520px;}
.cta-block .btn-x{flex-shrink:0;}

/* ---------- 固定转化条 ---------- */
.to-fixed{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  width:360px;max-width:calc(100vw - 32px);
  background:rgba(15,18,22,.96);color:var(--c-paper);
  border-radius:var(--r-pill);padding:10px 10px 10px 22px;
  display:flex;align-items:center;gap:14px;
  box-shadow:0 18px 40px -18px rgba(15,18,22,.5);
  opacity:0;transform:translateY(8px);pointer-events:none;
  transition:opacity 300ms ease,transform 300ms ease;
}
.to-fixed.is-on{opacity:1;transform:translateY(0);pointer-events:auto;}
.to-fixed .tf-text{font-size:13.5px;line-height:1.4;font-weight:500;}
.to-fixed .btn-x{margin-left:auto;height:40px;padding:0 18px;font-size:13.5px;}

/* ---------- 页脚 ---------- */
.site-foot{
  margin-top:var(--sec);
  background:var(--c-ink);color:var(--c-paper);
  border-radius:24px 24px 0 0;padding:64px 0 28px;
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.foot-brand .logo{margin-bottom:16px;}
.foot-brand .logo-mark{background:var(--c-accent);color:var(--c-accent-ink);}
.foot-brand .logo-text b{color:var(--c-paper);}
.foot-brand .logo-text span{color:rgba(245,243,238,.6);}
.foot-desc{font-size:14px;line-height:1.7;color:rgba(245,243,238,.66);max-width:280px;}
.foot-domain{
  margin-top:16px;display:inline-block;
  font-family:var(--font-num);font-size:13px;letter-spacing:.04em;
  color:rgba(245,243,238,.5);border:1px solid rgba(245,243,238,.18);
  border-radius:var(--r-pill);padding:4px 12px;
}
.foot-h{font-size:13px;font-weight:700;letter-spacing:.1em;color:rgba(245,243,238,.5);margin-bottom:16px;}
.foot-list li{margin-bottom:10px;}
.foot-list a{font-size:14px;color:rgba(245,243,238,.82);}
.foot-list a:hover{color:var(--c-accent);}
.foot-contact{font-size:14px;line-height:1.9;color:rgba(245,243,238,.72);}
.foot-contact b{color:var(--c-paper);font-weight:600;}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(245,243,238,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(245,243,238,.5);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 400ms ease,transform 400ms ease;}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
  *{animation:none!important;transition:none!important;}
}

/* ---------- 断点 ---------- */
@media (max-width:1199px){
  :root{--sec:80px;}
  .hero-grid{gap:36px;}
  .check-panel{padding:30px;}
  .check-list{gap:0 28px;}
}
@media (max-width:991px){
  :root{--sec:72px;}
  .nav-links,.nav-cta{display:none;}
  .nav-burger{display:inline-flex;}
  .hero-grid{grid-template-columns:1fr;gap:28px;}
  .hero-figure{aspect-ratio:16/10;}
  .check-list{grid-template-columns:1fr;}
  .check-list .check-item:nth-last-child(-n+2){border-bottom:1px solid var(--c-line);}
  .check-list .check-item:last-child{border-bottom:0;}
  .stat-bar{grid-template-columns:1fr 1fr;gap:26px 20px;padding:28px 26px;}
  .stat-item:nth-child(3){border-left:0;padding-left:0;}
  .rel-grid{grid-template-columns:1fr 1fr;}
  .cta-block{flex-direction:column;align-items:flex-start;padding:36px 30px;}
  .cta-block .btn-x{width:100%;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .faq-panel{padding:4px 22px;}
}
@media (max-width:767px){
  :root{--sec:56px;}
  body{font-size:15.5px;}
  .wrap{padding:0 18px;}
  .site-head{padding:0 12px;top:8px;}
  .nav-card{border-radius:18px;padding:8px 10px 8px 14px;gap:10px;}
  .logo-mark{width:34px;height:34px;flex-basis:34px;font-size:17px;border-radius:10px;}
  .logo-text b{font-size:15px;}
  .logo-text span{font-size:11px;}
  .check-panel{padding:22px;}
  .check-item{padding:15px 0;}
  .rel-grid{grid-template-columns:1fr;}
  .stat-bar{grid-template-columns:1fr 1fr;padding:24px 20px;}
  .stat-item{padding-left:16px;}
  .stat-label{font-size:12px;}
  .to-fixed{
    right:0;left:0;bottom:0;width:100%;max-width:none;border-radius:0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    height:auto;min-height:64px;
  }
  .to-fixed .tf-text{font-size:13px;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .foot-bottom{flex-direction:column;gap:8px;}
  .crumb .now{max-width:46vw;}
}
@media (max-width:575px){
  h1.hero-h1{font-size:clamp(28px,7.4vw,34px);}
  .hero-sub{font-size:15px;}
  .btn-x{width:100%;}
  .hero-tags .badge-x{font-size:11.5px;}
  .check-panel{padding:18px;border-radius:var(--r-card);}
  .stat-bar{grid-template-columns:1fr 1fr;gap:20px 14px;}
  .stat-num{font-size:26px;}
  .faq-panel{padding:2px 16px;}
  .accordion-button{font-size:15px;padding:16px 38px 16px 0;}
  .accordion-body{padding:0 30px 18px 0;font-size:14.5px;}
  .cta-block{padding:28px 22px;border-radius:var(--r-card);}
  .rel-body{padding:18px 18px 20px;}
}