/* 好道AI数字人 产品官网 全站样式 —— 深色科技风·橙色主调（对齐好道传媒矩阵），纯静态无框架，移动优先 */
:root {
  --brand: #f59e0b;
  --brand-2: #f97316;
  --brand-soft: rgba(245, 158, 11, .12);
  --ink: #f4f4f5;
  --ink-2: #a1a1aa;
  --ink-3: #71717a;
  --line: #26262b;
  --bg: #0b0b0d;
  --bg-soft: #101013;
  --card: #141417;
  --card-2: #17171b;
  --hg-green: #34d399;
  --ok: #34d399;
  --radius: 16px;
  --shadow: 0 14px 44px rgba(0, 0, 0, .45);
  --shadow-sm: 0 6px 20px rgba(0, 0, 0, .35);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink); background: var(--bg);
  font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
.container { width: min(1140px, calc(100% - 40px)); margin: 0 auto; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 11, 13, .86);
  backdrop-filter: saturate(1.2) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-bar { display: flex; align-items: center; gap: 24px; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; white-space: nowrap; letter-spacing: .3px; }
.brand-logo-img { height: 30px; width: auto; }
.logo-mark { width: 32px; height: 32px; border-radius: 9px; background: linear-gradient(135deg, var(--brand), var(--brand-2)); display: grid; place-items: center; color: #131313; flex: none; }
.nav-links { display: none; align-items: center; gap: 2px; margin-left: auto; }
.nav-links a { position: relative; padding: 9px 14px; border-radius: 8px; font-size: 15px; color: var(--ink-2); white-space: nowrap; transition: .15s; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--brand); font-weight: 600; }
.nav-links a.active::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px; border-radius: 2px; background: var(--brand); }
.nav-cta { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.menu-btn { margin-left: auto; width: 40px; height: 40px; border: 1px solid var(--line); background: var(--card); border-radius: 10px; display: grid; place-items: center; cursor: pointer; }
.mobile-nav { display: none; border-top: 1px solid var(--line); background: var(--bg); padding: 10px 0 16px; }
.mobile-nav.open { display: block; }
.mobile-nav a { display: block; padding: 12px 4px; font-size: 16px; color: var(--ink-2); border-bottom: 1px solid var(--bg-soft); }
.mobile-nav a.active { color: var(--brand); font-weight: 600; }
.mobile-nav .btn { width: 100%; margin-top: 12px; }

/* 集团背书细条 */
.endorse-bar { background: var(--bg-soft); border-bottom: 1px solid var(--line); font-size: 13px; color: var(--ink-2); }
.endorse-bar .container { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 8px 0; flex-wrap: wrap; text-align: center; }
.endorse-bar img { height: 22px; width: auto; background: #fff; border-radius: 5px; padding: 2px 6px; }
.endorse-bar b { color: var(--hg-green); font-weight: 600; }
.endorse-bar .dot { width: 3px; height: 3px; border-radius: 50%; background: #3f3f46; }
.endorse-bar a { color: var(--brand); }
.endorse-bar a:hover { text-decoration: underline; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: 999px; font-size: 16px; font-weight: 700;
  white-space: nowrap; transition: .18s; cursor: pointer; border: none;
}
.btn-primary { background: linear-gradient(120deg, var(--brand), var(--brand-2)); color: #131313; box-shadow: 0 8px 26px rgba(245, 158, 11, .28); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 32px rgba(249, 115, 22, .38); }
.btn-ghost { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 15px 36px; font-size: 17px; }

/* ---------- Hero（深黑网格+左对齐+三角装饰） ---------- */
.hero { position: relative; overflow: hidden; background: var(--bg); color: var(--ink); }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(80% 90% at 60% 30%, #000 30%, transparent 100%);
  mask-image: radial-gradient(80% 90% at 60% 30%, #000 30%, transparent 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(52% 60% at 78% 24%, rgba(249, 115, 22, .14), transparent 70%),
              radial-gradient(40% 50% at 12% 88%, rgba(245, 158, 11, .07), transparent 70%);
}
.hero-tris { position: absolute; right: -60px; top: 60px; width: 560px; max-width: 60vw; opacity: .95; pointer-events: none; }
.hero > .container { position: relative; z-index: 1; padding: 96px 0 72px; text-align: left; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px; padding: 8px 18px; border-radius: 999px;
  background: var(--brand-soft); border: 1px solid rgba(245, 158, 11, .3); color: var(--brand); font-size: 14px; font-weight: 600; margin-bottom: 26px;
}
.hero-badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 10px var(--brand); }
.hero h1 { font-size: clamp(34px, 6.4vw, 62px); line-height: 1.18; letter-spacing: -.5px; font-weight: 800; max-width: 720px; }
.hero h1 .grad { background: linear-gradient(100deg, var(--brand) 10%, var(--brand-2) 90%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .sub { max-width: 640px; margin: 24px 0 0; font-size: clamp(15px, 2.2vw, 17.5px); color: var(--ink-2); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 30px; font-size: 13.5px; color: var(--ink-3); }
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }

/* Hero 内数据带 */
.hero-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 46px; max-width: 860px; }
.hero-stats > div { background: rgba(255,255,255,.028); border: 1px solid var(--line); border-radius: 14px; padding: 18px 16px; }
.hero-stats b { display: block; font-size: clamp(24px, 3vw, 32px); color: var(--brand); letter-spacing: -.5px; line-height: 1.25; }
.hero-stats span { font-size: 12.5px; color: var(--ink-3); }

/* ---------- 通用区块 ---------- */
.section { padding: 78px 0; }
.section.alt { background: var(--bg-soft); }
.sec-head { max-width: 760px; margin: 0 auto 46px; text-align: center; }
.eyebrow { display: block; font-size: 13px; font-weight: 800; color: var(--brand); letter-spacing: 4px; margin-bottom: 12px; text-transform: uppercase; }
.sec-head h2 { font-size: clamp(25px, 4vw, 36px); letter-spacing: -.3px; font-weight: 800; }
.sec-head p { margin-top: 14px; color: var(--ink-2); font-size: 16.5px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; transition: .2s; }
.card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: rgba(245, 158, 11, .4); }
.card .icon-tile { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px; background: var(--brand-soft); color: var(--brand); border: 1px solid rgba(245, 158, 11, .22); }
.card.v .icon-tile { background: rgba(245, 158, 11, .1); }
.card.g .icon-tile { background: rgba(52, 211, 153, .1); color: var(--ok); border-color: rgba(52, 211, 153, .22); }
.card h3 { font-size: 18.5px; margin-bottom: 9px; font-weight: 700; }
.card p { font-size: 14.8px; color: var(--ink-2); }
.card .more { display: inline-flex; align-items: center; gap: 5px; margin-top: 15px; font-size: 14.5px; font-weight: 700; color: var(--brand); }
.card .more:hover { text-decoration: underline; }

/* ---------- 真实成片展示 ---------- */
.showcase { display: grid; gap: 20px; grid-template-columns: 1fr; align-items: stretch; }
.shot-card { position: relative; border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); background: var(--card); border: 1px solid var(--line); }
.shot-card > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.shot-card:hover > img { transform: scale(1.03); }
.shot-fig { margin: 0; display: flex; flex-direction: column; gap: 0; min-width: 0; }
.shot-fig .shot-card { flex: 1; }
.shot-cap { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 12px 4px 0; }
.shot-cap b { font-size: 14.5px; }
.shot-cap span { color: var(--ink-3); font-size: 12.5px; white-space: nowrap; }
.shot-hero { aspect-ratio: 16/9.4; }
.shot-tall { aspect-ratio: 9/16; }
.shot-fill { aspect-ratio: 9/16; }
@media (min-width: 640px) {
  .showcase { grid-template-columns: 1.6fr 1fr; }
  .showcase .shot-fill { aspect-ratio: auto; height: auto; }
  .showcase .shot-fig { height: 100%; }
}
.demo-note { text-align: center; margin-top: 20px; font-size: 13px; color: var(--ink-3); }

/* ---------- 流程步骤 ---------- */
.steps { counter-reset: step; display: grid; gap: 16px; grid-template-columns: 1fr; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; position: relative; transition: .2s; }
.step:hover { border-color: rgba(245, 158, 11, .4); }
.step::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #131313; font-weight: 800; font-size: 16px; margin-bottom: 16px;
}
.step h3 { font-size: 17px; margin-bottom: 6px; }
.step p { font-size: 14.5px; color: var(--ink-2); }

/* ---------- 场景条 ---------- */
.scene { display: grid; gap: 22px; align-items: center; padding: 28px 0; border-bottom: 1px solid var(--line); grid-template-columns: 1fr; }
.scene:last-child { border-bottom: none; }
.scene h3 { font-size: 19px; margin-bottom: 8px; }
.scene p { color: var(--ink-2); font-size: 15px; }
.scene .tags { margin-top: 13px; display: flex; flex-wrap: wrap; gap: 8px; }
.scene-ico { width: 56px; height: 56px; border-radius: 14px; background: var(--brand-soft); color: var(--brand); border: 1px solid rgba(245, 158, 11, .22); display: grid; place-items: center; }
.chip { padding: 7px 15px; border-radius: 999px; border: 1px solid var(--line); font-size: 13px; color: var(--ink-2); background: var(--card); }
.chip.on { background: var(--brand-soft); border-color: rgba(245, 158, 11, .35); color: var(--brand); font-weight: 600; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 840px; margin: 0 auto; display: grid; gap: 12px; }
details.faq { background: var(--card); border: 1px solid var(--line); border-radius: 13px; padding: 0 22px; }
details.faq[open] { border-color: rgba(245, 158, 11, .45); box-shadow: var(--shadow-sm); }
details.faq summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 18px 0; font-weight: 600; font-size: 15.8px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; font-size: 23px; color: var(--brand); flex: none; line-height: 1; transition: .2s; }
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq .ans { padding: 0 0 19px; color: var(--ink-2); font-size: 15px; }

/* ---------- CTA 条 ---------- */
.cta-band { position: relative; overflow: hidden; background: linear-gradient(120deg, var(--brand), var(--brand-2)); border-radius: 22px; color: #131313; text-align: center; padding: 54px 26px; }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(rgba(0,0,0,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.055) 1px, transparent 1px);
  background-size: 38px 38px;
  -webkit-mask-image: radial-gradient(95% 130% at 50% 0%, #000 30%, transparent 95%);
  mask-image: radial-gradient(95% 130% at 50% 0%, #000 30%, transparent 95%);
}
.cta-band::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(3px 3px at 12% 32%, rgba(255,255,255,.7), transparent 60%),
    radial-gradient(2px 2px at 26% 72%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(2.5px 2.5px at 42% 20%, rgba(19,19,19,.32), transparent 60%),
    radial-gradient(2px 2px at 57% 80%, rgba(255,255,255,.6), transparent 60%),
    radial-gradient(3px 3px at 74% 24%, rgba(19,19,19,.28), transparent 60%),
    radial-gradient(2px 2px at 86% 64%, rgba(255,255,255,.65), transparent 60%),
    radial-gradient(1.6px 1.6px at 66% 12%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(2px 2px at 6% 76%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(1.6px 1.6px at 92% 38%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(2.2px 2.2px at 36% 88%, rgba(255,255,255,.4), transparent 60%),
    radial-gradient(46% 95% at 84% 8%, rgba(255,255,255,.15), transparent 70%),
    radial-gradient(42% 85% at 8% 96%, rgba(19,19,19,.12), transparent 70%);
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { font-size: clamp(23px, 4vw, 32px); font-weight: 800; }
.cta-band p { margin: 10px auto 26px; opacity: .82; max-width: 560px; font-weight: 500; }
.cta-band .btn { background: #131313; color: #fff; }
.cta-band .btn:hover { transform: translateY(-2px); }

/* ---------- 面包屑 ---------- */
.crumbs { padding: 18px 0 0; font-size: 13.5px; color: var(--ink-3); }
.crumbs a { color: var(--ink-3); }
.crumbs a:hover { color: var(--brand); }
.crumbs .sep { margin: 0 8px; }

/* ---------- 页面头部（子页） ---------- */
.page-hero { padding: 48px 0 50px; text-align: center; position: relative; overflow: hidden; }
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(70% 100% at 50% 0%, #000 20%, transparent 100%);
  mask-image: radial-gradient(70% 100% at 50% 0%, #000 20%, transparent 100%);
}
.page-hero > .container { position: relative; }
.page-hero h1 { font-size: clamp(27px, 5vw, 42px); letter-spacing: -.4px; font-weight: 800; }
.page-hero h1 .grad, .page-hero .grad { background: linear-gradient(100deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-hero .sub { max-width: 720px; margin: 18px auto 0; color: var(--ink-2); font-size: 16.5px; }

/* ---------- 功能页成片展示 ---------- */
.shot-duo { display: grid; gap: 20px; grid-template-columns: 1fr; align-items: stretch; margin: 34px auto 0; max-width: 880px; }
.shot-duo .tall-wrap { display: flex; justify-content: center; width: 280px; }
.shot-duo .shot-card.tall { width: 280px; aspect-ratio: 9/16; }

/* ---------- 集团背书 ---------- */
.group-band { background: var(--card); border: 1px solid var(--line); color: var(--ink-2); border-radius: 20px; padding: 44px 32px; display: grid; gap: 30px; align-items: center; }
.group-band img.grp-logo { height: 32px; width: auto; background: #fff; border-radius: 7px; padding: 4px 8px; margin-bottom: 16px; }
.group-band h3 { color: var(--ink); font-size: 22px; margin-bottom: 10px; font-weight: 800; }
.group-band p { font-size: 14.8px; color: var(--ink-2); line-height: 1.95; }
.group-band .grp-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; }
.group-band .grp-stats div { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 16px 10px; text-align: center; }
.group-band .grp-stats b { display: block; color: var(--brand); font-size: 20px; font-weight: 800; }
.group-band .grp-stats span { font-size: 12px; color: var(--ink-3); }
.group-band .grp-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; color: var(--brand); font-weight: 700; font-size: 14.5px; }
.group-band .grp-link:hover { text-decoration: underline; }

/* 联系卡（关于页） */
.contact-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.contact-card h3 { font-size: 17px; margin-bottom: 14px; }
.contact-card .row { display: flex; gap: 14px; padding: 10px 0; font-size: 14.8px; color: var(--ink-2); align-items: flex-start; border-bottom: 1px dashed var(--line); }
.contact-card .row:last-child { border-bottom: none; }
.contact-card .row b { color: var(--ink); font-weight: 600; flex: none; }
.contact-card .row .link, .link { color: var(--brand); }
.qr-card { text-align: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 20px; }
.qr-card img { width: 150px; height: 150px; margin: 0 auto 14px; border-radius: 10px; background: #fff; padding: 6px; }
.qr-card b { display: block; font-size: 15.5px; }
.qr-card span { font-size: 13px; color: var(--ink-3); }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 18px; bottom: 22px; z-index: 60; width: 44px; height: 44px; border-radius: 12px;
  background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow-sm); color: var(--ink-2);
  display: grid; place-items: center; cursor: pointer; opacity: 0; pointer-events: none; transition: .25s;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { color: var(--brand); border-color: var(--brand); }

/* ---------- 页脚 ---------- */
.site-footer { background: #08080a; color: #9b9ba4; margin-top: 40px; padding: 58px 0 30px; font-size: 14px; border-top: 1px solid var(--line); }
.foot-grid { display: grid; gap: 32px; grid-template-columns: 1fr; padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.foot-brand .logo { margin-bottom: 14px; }
.foot-brand .brand-logo-img { height: 26px; }
.foot-brand p { max-width: 340px; line-height: 1.8; }
.foot-group { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--line); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 13px; color: #8a8a94; }
.foot-group img { height: 26px; width: auto; background: #fff; border-radius: 6px; padding: 2px 6px; }
.foot-group a { color: var(--brand); }
.foot-group a:hover { text-decoration: underline; }
.foot-col h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.foot-col a { display: block; padding: 5px 0; color: #9b9ba4; }
.foot-col a:hover { color: var(--brand); }
.foot-base { display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; padding-top: 22px; font-size: 12.5px; color: #6c6c75; }
.foot-base a { color: #6c6c75; }
.foot-base a:hover { color: var(--brand); }

/* ---------- 文章型内容（功能页正文） ---------- */
.prose { max-width: 800px; margin: 0 auto; }
.prose h2 { font-size: 23px; margin: 42px 0 14px; letter-spacing: -.3px; font-weight: 800; }
.prose h3 { font-size: 18px; margin: 26px 0 10px; }
.prose p { color: var(--ink-2); margin-bottom: 14px; font-size: 15.8px; }
.prose ul { margin: 0 0 16px 20px; color: var(--ink-2); font-size: 15.5px; display: grid; gap: 6px; }
.prose .lead { font-size: 17.5px; color: var(--ink); }
.prose a, .link { color: var(--brand); }
.check-list { list-style: none; margin-left: 0 !important; }
.check-list li { padding-left: 28px; position: relative; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 20px; height: 20px; border-radius: 6px; background: rgba(52, 211, 153, .12); color: var(--ok); font-size: 13px; display: grid; place-items: center; font-weight: 700; }

/* ---------- 数据带（独立区块用法） ---------- */
.stats-band { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 26px; }
.stats-band > div { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px 12px; text-align: center; }
.stats-band b { display: block; font-size: clamp(22px, 3vw, 28px); color: var(--brand); letter-spacing: -.5px; line-height: 1.3; }
.stats-band span { font-size: 12.5px; color: var(--ink-3); }
@media (min-width: 900px) { .stats-band { grid-template-columns: repeat(4, 1fr); } }
.why-grid { margin-bottom: 6px; }

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .scene { grid-template-columns: 64px 1fr; }
  .group-band { grid-template-columns: 1.4fr 1fr; }
  .contact-cols { grid-template-columns: 1.5fr 1fr; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 900px) {
  .nav-links { display: flex; }
  .menu-btn { display: none; }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(5, 1fr); }
  .foot-grid { grid-template-columns: 1.7fr 1fr 1fr 1fr; }
  .shot-duo { grid-template-columns: 1fr 280px; }
}
@media (max-width: 639px) {
  .contact-cols { grid-template-columns: 1fr; }
  .hero-tris { opacity: .4; }
  .nav-bar { gap: 12px; }
  .logo { font-size: 17.5px; }
  .nav-cta .btn { padding: 8px 14px; font-size: 13.5px; }
  .menu-btn { width: 38px; height: 38px; flex: none; }
}

/* ===== 移动底部导航（官网快捷入口） ===== */
.mobile-bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0; width: 100%; max-width: none;
  z-index: 60; display: flex; justify-content: center;
  background: #0b0b0d; border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.mobile-bottom-nav .mbn-inner { display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; max-width: 480px; }
.mobile-bottom-nav a {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  padding: 9px 0 8px; font-size: 11px; color: #a1a1aa; line-height: 1.3;
}
.mobile-bottom-nav a svg { width: 20px; height: 20px; }
.mobile-bottom-nav a.active { color: var(--brand); }
body { padding-bottom: calc(52px + env(safe-area-inset-bottom, 0px)); }
@media (min-width: 768px) {
  .mobile-bottom-nav { display: none; }
  body { padding-bottom: 0; }
}