/* ============ 数字工坊 · 共享样式 ============ */
:root {
  --bg: #0B0E17;
  --surface: #111827;
  --card: #1A2235;
  --border: #2D3652;
  --accent: #F59E0B;
  --accent-glow: #FBBF24;
  --accent-dim: #D97706;
  --text: #F9FAFB;
  --text-2: #9CA3AF;
  --text-3: #6B7280;
  --grid: rgba(245, 158, 11, 0.04);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans SC', system-ui, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: var(--bg); }

/* layout */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 60px 0; position: relative; }
.grid-bg {
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* typography */
.grad-text {
  background: linear-gradient(135deg, #F59E0B, #FBBF24, #D97706);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.serif { font-family: 'Noto Serif SC', Georgia, serif; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 500; margin-bottom: 24px;
}
.eyebrow.blue { border: 1px solid rgba(59,130,246,.3); background: rgba(59,130,246,.1); color: #60A5FA; }
.eyebrow.amber { border: 1px solid rgba(245,158,11,.3); background: rgba(245,158,11,.1); color: var(--accent); }
.eyebrow.green { border: 1px solid rgba(16,185,129,.3); background: rgba(16,185,129,.1); color: #34D399; }
.eyebrow.purple { border: 1px solid rgba(168,85,247,.3); background: rgba(168,85,247,.1); color: #C084FC; }
.eyebrow.red { border: 1px solid rgba(239,68,68,.3); background: rgba(239,68,68,.1); color: #F87171; }

h1, h2, h3 { font-weight: 700; line-height: 1.15; }
.section-title { font-size: clamp(28px, 4vw, 40px); margin-bottom: 16px; }
.section-sub { font-size: 18px; color: var(--text-2); max-width: 700px; margin: 0 auto; }
.text-center { text-align: center; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 12px; font-weight: 600;
  font-size: 15px; cursor: pointer; border: none; text-decoration: none;
  transition: all .25s ease;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-glow); box-shadow: 0 0 30px rgba(245,158,11,.4); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--card); }

/* NAVBAR */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(11,14,23,.9); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(45,54,82,.5);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); }
.logo-mark { width: 36px; height: 36px; border-radius: 8px; background: var(--accent); display: flex; align-items: center; justify-content: center; color: var(--bg); }
.logo-img { max-height: 40px; width: auto; }
.logo-text { font-family: 'Noto Serif SC', serif; font-weight: 700; font-size: 18px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: 4px; padding: 8px 12px;
  font-size: 14px; font-weight: 500; border-radius: 8px; cursor: pointer;
  text-decoration: none; color: var(--text-2); transition: color .2s;
}
.nav-link:hover, .nav-link.active { color: var(--accent); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-cta a.txt { font-size: 14px; color: var(--text-2); text-decoration: none; }
.nav-cta a.txt:hover { color: var(--text); }
.nav-cta a.btn { padding: 8px 20px; font-size: 14px; }
.hamburger { display: none; background: none; border: none; color: var(--text-2); cursor: pointer; padding: 8px; }

.mobile-menu {
  display: none; background: var(--surface); border-top: 1px solid var(--border);
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
}
.mobile-menu.open { max-height: 600px; }
.mobile-menu a { display: block; padding: 14px 24px; font-size: 15px; color: var(--text-2); text-decoration: none; border-bottom: 1px solid rgba(45,54,82,.4); }
.mobile-menu a:hover { color: var(--text); }

/* HERO (home) */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: 64px; overflow: hidden; }
.hero-glow { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(245,158,11,.15), transparent); }
.hero-blob { position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 800px; height: 400px; pointer-events: none; background: rgba(245,158,11,.1); filter: blur(120px); border-radius: 50%; }
.hero-grid { position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 40px 40px; }
.hero-inner { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; width: 100%; }
.badge-pulse { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 999px; border: 1px solid rgba(245,158,11,.3); background: rgba(245,158,11,.1); margin-bottom: 32px; }
.badge-pulse .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .3; } }
.hero h1 { font-size: clamp(36px, 5.5vw, 60px); line-height: 1.1; margin-bottom: 24px; }
.hero p.lead { font-size: 18px; color: var(--text-2); max-width: 520px; margin-bottom: 40px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 48px; }
.stats-row { display: flex; gap: 40px; }
.stat-val { font-size: 26px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--text-3); margin-top: 4px; }

.hero-visual { position: relative; display: none; }
@media (min-width: 1024px) { .hero-visual { display: block; } }
.card-code { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; box-shadow: 0 24px 60px rgba(0,0,0,.5); }
.card-code .dots { display: flex; gap: 6px; margin-bottom: 12px; }
.card-code .dots span { width: 12px; height: 12px; border-radius: 50%; }
.card-code pre { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--text-2); line-height: 1.7; }
.card-code .tk { color: var(--accent); }
.card-metric { position: absolute; bottom: -24px; left: -24px; background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 20px; box-shadow: 0 20px 40px rgba(0,0,0,.4); width: 208px; }
.card-badge { position: absolute; top: 32px; right: -16px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px; box-shadow: 0 16px 32px rgba(0,0,0,.4); }
.spin-slow { position: absolute; border: 1px solid rgba(245,158,11,.2); border-radius: 50%; animation: spin 12s linear infinite; }
.spin-rev { position: absolute; border: 1px solid rgba(245,158,11,.1); border-radius: 50%; animation: spin 8s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.scroll-hint { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 4px; }
.scroll-hint span { font-size: 12px; color: var(--text-3); }

/* cards grid */
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 64px; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cards-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 1024px) { .cards-4 { grid-template-columns: repeat(2, 1fr); } .cards-3, .cards-2 { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .cards-4 { grid-template-columns: 1fr; } }

.mp-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 20px; transition: all .25s; cursor: pointer; }
.mp-card:hover { border-color: rgba(245,158,11,.4); box-shadow: 0 0 30px rgba(245,158,11,.08); transform: translateY(-2px); }
.mp-icon { font-size: 28px; margin-bottom: 12px; }
.mp-card h3 { font-size: 15px; color: var(--text); margin-bottom: 4px; transition: color .2s; }
.mp-card:hover h3 { color: var(--accent); }
.mp-card p { font-size: 12px; color: var(--text-3); }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 48px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.panel-head h3 { font-size: 22px; }

.case-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; transition: all .25s; }
.case-card:hover { border-color: rgba(245,158,11,.3); transform: translateY(-2px); }
.tag-inline { display: inline-flex; padding: 4px 10px; border-radius: 999px; background: rgba(245,158,11,.1); color: var(--accent); font-size: 12px; font-weight: 500; margin-bottom: 12px; }
.case-card .hl { font-size: 20px; font-weight: 700; margin: 4px 0 12px; }
.case-card p { font-size: 14px; color: var(--text-2); margin-bottom: 16px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.tag-list span { padding: 4px 8px; border-radius: 6px; background: rgba(45,54,82,.5); font-size: 12px; color: var(--text-3); }
.link-more { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; color: var(--accent); text-decoration: none; }

/* features */
.feature-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; transition: all .25s; }
.feature-ic { width: 44px; height: 44px; border-radius: 12px; background: rgba(245,158,11,.1); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; color: var(--accent); }
.feature-card h3 { font-size: 16px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-2); }

.process-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; height: 100%; position: relative; }
.process-num { font-size: 32px; font-weight: 700; color: rgba(245,158,11,.2); margin-bottom: 12px; font-family: 'Noto Serif SC', serif; }
.process-card h4 { font-size: 15px; margin-bottom: 8px; }
.process-card p { font-size: 12px; color: var(--text-2); }
.process-arrow { display: none; }
@media (min-width: 1024px) { .process-arrow { display: block; position: absolute; top: 50%; right: -16px; transform: translateY(-50%); color: var(--text-3); z-index: 2; } }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
@media (max-width: 1024px) { .two-col { grid-template-columns: 1fr; gap: 48px; } }
.check-list { display: flex; flex-direction: column; gap: 16px; margin: 32px 0; }
.check-item { display: flex; align-items: flex-start; gap: 12px; }
.check-item svg { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.check-item span { font-size: 14px; color: var(--text-2); }

.browser-mock { background: var(--card); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
.browser-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.browser-bar .dots { display: flex; gap: 6px; }
.browser-bar .dots span { width: 12px; height: 12px; border-radius: 50%; }
.browser-body { padding: 24px; }
.skel { border-radius: 8px; background: rgba(45,54,82,.5); }
.seo-badge { position: absolute; bottom: -16px; right: -16px; background: var(--accent); color: var(--bg); font-size: 12px; font-weight: 700; padding: 8px 16px; border-radius: 12px; box-shadow: 0 12px 24px rgba(0,0,0,.3); }

.doc-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; transition: all .25s; cursor: pointer; }
.doc-card:hover { border-color: rgba(245,158,11,.4); transform: translateY(-2px); }
.doc-card .doc-ic { font-size: 28px; margin-bottom: 16px; }
.doc-card h3 { font-size: 16px; margin-bottom: 8px; transition: color .2s; }
.doc-card:hover h3 { color: var(--accent); }
.doc-card p { font-size: 14px; color: var(--text-2); }

/* about timeline */
.timeline-item { display: flex; gap: 16px; }
.tl-year { flex-shrink: 0; width: 56px; text-align: right; font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 14px; color: var(--accent); }
.tl-body { position: relative; padding-left: 24px; border-left: 1px solid var(--border); padding-bottom: 16px; }
.tl-body::before { content: ''; position: absolute; left: 0; top: 6px; transform: translateX(-50%); width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.tl-body p { font-size: 14px; color: var(--text-2); }

.mini-stat { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.mini-stat .ms-label { font-size: 12px; color: var(--text-3); margin-bottom: 4px; }
.mini-stat .ms-val { font-size: 18px; font-weight: 700; }

/* contact */
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-row { display: flex; align-items: center; gap: 16px; }
.contact-ic { width: 40px; height: 40px; border-radius: 12px; background: rgba(245,158,11,.1); display: flex; align-items: center; justify-content: center; color: var(--accent); flex-shrink: 0; }
.contact-row .ci-label { font-size: 12px; color: var(--text-3); margin-bottom: 2px; }
.contact-row .ci-val { font-size: 14px; color: var(--text); font-weight: 500; }

.form { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 32px; display: flex; flex-direction: column; gap: 20px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.field label { display: block; font-size: 12px; color: var(--text-3); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 16px; font-size: 14px; color: var(--text);
  font-family: inherit; transition: border-color .2s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-3); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: rgba(245,158,11,.6); }
.field select option { background: var(--surface); }
.submit-btn { width: 100%; padding: 14px; border-radius: 12px; font-weight: 600; font-size: 14px; border: none; cursor: pointer; background: var(--accent); color: var(--bg); transition: all .25s; font-family: inherit; }
.submit-btn:hover { background: var(--accent-glow); }
.submit-btn.sent { background: #22C55E; color: #fff; }
.form-note { font-size: 12px; color: var(--text-3); text-align: center; }

/* footer */
.footer { background: var(--surface); border-top: 1px solid var(--border); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer h4 { font-size: 14px; color: var(--text); margin-bottom: 16px; }
.footer ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer ul a { font-size: 14px; color: var(--text-2); text-decoration: none; transition: color .2s; }
.footer ul a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 32px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-bottom p { font-size: 12px; color: var(--text-3); }
.social-row { display: flex; gap: 12px; margin-top: 16px; }
.social-row a { width: 32px; height: 32px; border-radius: 8px; background: var(--card); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 10px; color: var(--text-3); text-decoration: none; transition: border-color .2s; }
.social-row a:hover { border-color: rgba(245,158,11,.4); }

/* ============ 内页样式 ============ */
/* page hero */
.page-hero { position: relative; padding: 140px 0 72px; overflow: hidden; background: var(--bg); }
.page-hero .hero-grid { position: absolute; inset: 0; }
.page-hero .hero-glow { position: absolute; inset: 0; background: radial-gradient(ellipse 70% 60% at 50% -30%, rgba(245,158,11,.12), transparent); }
.page-hero .container { position: relative; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-3); margin-bottom: 20px; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-2); text-decoration: none; transition: color .2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .cur { color: var(--text-3); }
.page-title { font-size: clamp(30px, 4.5vw, 46px); margin-bottom: 16px; }
.page-desc { font-size: 17px; color: var(--text-2); max-width: 720px; line-height: 1.7; }

/* category filter (list pages) */
.cat-bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 40px 0 32px; }
.filter-btn { padding: 7px 18px; border-radius: 999px; font-size: 14px; border: 1px solid var(--border); background: var(--card); color: var(--text-2); cursor: pointer; transition: all .2s; font-family: inherit; }
.filter-btn:hover { color: var(--text); border-color: rgba(245,158,11,.4); }
.filter-btn.active { background: var(--accent); color: var(--bg); font-weight: 600; border-color: var(--accent); }

/* list cards */
.list-card { display: flex; gap: 24px; background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; transition: all .25s; cursor: pointer; text-decoration: none; color: inherit; }
.list-card:hover { border-color: rgba(245,158,11,.4); transform: translateY(-2px); box-shadow: 0 0 30px rgba(245,158,11,.06); }
.list-cover { width: 88px; height: 88px; border-radius: 14px; background: rgba(245,158,11,.08); display: flex; align-items: center; justify-content: center; font-size: 36px; flex-shrink: 0; }
.list-body { flex: 1; min-width: 0; }
.list-body h3 { font-size: 17px; color: var(--text); margin-bottom: 6px; transition: color .2s; }
.list-card:hover .list-body h3 { color: var(--accent); }
.list-body p { font-size: 14px; color: var(--text-2); line-height: 1.6; }
.list-meta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 10px; font-size: 12px; color: var(--text-3); }
.list-meta .sep { color: var(--border); }
.list-meta .hl-text { color: var(--accent); font-weight: 600; }
.list-stack { display: flex; flex-direction: column; gap: 16px; }
.hide { display: none !important; }

/* detail layout */
.detail-wrap { display: grid; grid-template-columns: 250px 1fr; gap: 48px; align-items: start; }
@media (max-width: 1024px) { .detail-wrap { grid-template-columns: 1fr; } }
.toc { position: sticky; top: 88px; background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 20px; }
.toc h4 { font-size: 12px; letter-spacing: 1px; color: var(--text-3); margin-bottom: 12px; text-transform: uppercase; }
.toc a { display: block; padding: 7px 10px; font-size: 13px; color: var(--text-2); text-decoration: none; border-left: 2px solid transparent; transition: all .2s; }
.toc a:hover, .toc a.active { color: var(--accent); border-left-color: var(--accent); }
.article { min-width: 0; }
.article h2 { font-size: 24px; margin: 44px 0 16px; padding-top: 8px; scroll-margin-top: 90px; }
.article h3 { font-size: 18px; margin: 28px 0 12px; scroll-margin-top: 90px; }
.article p { color: var(--text-2); line-height: 1.9; margin-bottom: 16px; font-size: 15px; }
.article ul, .article ol { color: var(--text-2); margin: 0 0 16px 22px; line-height: 1.9; font-size: 15px; }
.article li { margin-bottom: 8px; }
.article strong { color: var(--text); }
.article a { color: var(--accent); }
.hl-box { background: rgba(245,158,11,.06); border: 1px solid rgba(245,158,11,.2); border-left: 3px solid var(--accent); border-radius: 8px; padding: 16px 20px; margin: 24px 0; font-size: 14px; color: var(--text-2); line-height: 1.8; }
.code-block { background: #0d1117; border: 1px solid var(--border); border-radius: 12px; margin: 20px 0; overflow: hidden; }
.code-block .cb-head { display: flex; justify-content: space-between; padding: 10px 16px; border-bottom: 1px solid var(--border); font-size: 12px; color: var(--text-3); }
.code-block pre { padding: 16px; overflow-x: auto; font-size: 13px; line-height: 1.7; color: #c9d1d9; font-family: 'JetBrains Mono', Consolas, monospace; }
.data-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.data-table th, .data-table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; color: var(--text-2); }
.data-table th { background: var(--card); color: var(--text); font-weight: 600; }
.kv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 32px; }
.kv-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 32px; }
@media (max-width: 640px) { .kv-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .kv-grid-4 { grid-template-columns: 1fr 1fr; } }
.kv { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.kv .k { font-size: 12px; color: var(--text-3); margin-bottom: 4px; }
.kv .v { font-size: 16px; font-weight: 600; color: var(--accent); }
.quote-box { border-left: 3px solid var(--accent); background: var(--card); border-radius: 0 12px 12px 0; padding: 16px 20px; margin: 24px 0; color: var(--text-2); font-size: 14px; line-height: 1.8; }
.quote-box .who { display: block; margin-top: 8px; font-size: 12px; color: var(--text-3); }

.related { margin-top: 48px; border-top: 1px solid var(--border); padding-top: 28px; }
.section-label { font-size: 12px; letter-spacing: 1px; color: var(--text-3); text-transform: uppercase; margin-bottom: 16px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 1024px) { .related-grid { grid-template-columns: 1fr; } }
.related-card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-decoration: none; transition: all .25s; }
.related-card:hover { border-color: rgba(245,158,11,.4); }
.related-card h4 { font-size: 14px; color: var(--text); margin-bottom: 6px; transition: color .2s; }
.related-card:hover h4 { color: var(--accent); }
.related-card p { font-size: 12px; color: var(--text-3); }
.pager { display: flex; justify-content: space-between; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); }
.pager a { font-size: 14px; color: var(--accent); text-decoration: none; }
.pager a:hover { color: var(--accent-glow); }

/* empty state */
.empty { text-align: center; padding: 80px 0; color: var(--text-3); }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

@media (max-width: 1024px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: block; }
  .mobile-menu { display: block; }
  .hero-inner { grid-template-columns: 1fr; }
  .stats-row { flex-wrap: wrap; gap: 24px; }
}

/* ===================== 价格卡片 ===================== */
.pricing-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
@media(max-width:1024px){.pricing-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:640px){.pricing-grid{grid-template-columns:1fr;}}
.price-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:32px;position:relative;display:flex;flex-direction:column;min-height:380px;}
.price-card.featured{border-color:var(--accent);background:rgba(245,158,11,0.05);}
.price-badge{position:absolute;top:-12px;left:24px;background:var(--accent);color:#000;font-size:12px;font-weight:600;padding:4px 12px;border-radius:999px;}
.price-header{margin-bottom:24px;}
.price-header h3{font-size:18px;font-weight:600;color:var(--text);margin-bottom:8px;}
.price-tag{font-size:28px;font-weight:700;color:var(--accent);}
.price-list{list-style:none;padding:0;margin:0;}
.price-list li{padding:8px 0;color:var(--text-2);font-size:14px;border-bottom:1px solid var(--border);}
.price-list li:last-child{border-bottom:none;}

/* ===================== 对比框 ===================== */
.compare-box{background:var(--card);border:1px solid var(--border);border-radius:16px;overflow:hidden;}
.compare-header{padding:16px 24px;border-bottom:1px solid var(--border);}
.compare-header h3{font-size:16px;font-weight:600;margin:0;}
.compare-body{padding:24px;}
.compare-item{margin-bottom:20px;}
.compare-item:last-child{margin-bottom:0;}
.compare-item strong{display:block;color:var(--text);font-size:15px;margin-bottom:8px;}
.compare-item p{color:var(--text-2);font-size:14px;line-height:1.6;margin:0;}

/* ===================== 致信区块 ===================== */
.letter-section .eyebrow{margin-bottom:24px;}

/* ===================== FAQ 卡片 ===================== */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
@media(max-width:768px){.faq-grid{grid-template-columns:1fr;}}
.faq-card{display:flex;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:24px;transition:all 0.2s;}
.faq-card:hover{border-color:var(--accent);transform:translateY(-2px);}
.faq-icon{font-size:32px;line-height:1;flex-shrink:0;}
.faq-content{flex:1;}
.faq-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;}
.faq-tags span{font-size:12px;color:var(--text-3);background:var(--surface);padding:4px 8px;border-radius:4px;}

/* ===================== AI 问答模拟 ===================== */
.ai-chat-demo{background:var(--card);border:1px solid var(--border);border-radius:16px;overflow:hidden;height:320px;display:flex;flex-direction:column;}
.ai-chat-header{background:rgba(245,158,11,.1);padding:12px 16px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--border);}
.ai-logo{width:32px;height:32px;background:var(--accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;}
.ai-chat-header span{font-size:14px;font-weight:500;color:var(--text);}
.ai-status{margin-left:auto;font-size:12px;color:#34D399;background:rgba(34,197,94,.1);padding:4px 8px;border-radius:999px;}
.ai-chat-body{flex:1;padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:12px;}
.ai-msg{display:flex;gap:8px;}
.ai-msg.user{justify-content:flex-end;}
.ai-msg.bot{justify-content:flex-start;}
.ai-bubble{max-width:80%;padding:10px 14px;border-radius:12px;font-size:14px;line-height:1.6;color:var(--text);}
.ai-msg.user .ai-bubble{background:var(--accent);color:#000;}
.ai-msg.bot .ai-bubble{background:var(--surface);border:1px solid var(--border);}
.ai-typing{display:flex;gap:4px;align-items:center;height:20px;}
.ai-typing span{width:6px;height:6px;background:var(--accent);border-radius:50%;animation:typing 1.4s infinite ease-in-out both;}
.ai-typing span:nth-child(1){animation-delay:-0.32s;}
.ai-typing span:nth-child(2){animation-delay:-0.16s;}
@keyframes typing{0%,80%,100%{transform:scale(0);opacity:.5;}40%{transform:scale(1);opacity:1;}}

/* ===================== 详情页样式优化 ===================== */
.page-hero{padding:120px 0 60px;background:linear-gradient(180deg,rgba(245,158,11,.05) 0%,transparent 100%);}
.page-hero h1{font-size:42px;margin-bottom:12px;}
.page-hero .sub{color:var(--text-2);font-size:16px;}
.breadcrumb{font-size:14px;color:var(--text-3);}
.breadcrumb a{color:var(--text-2);text-decoration:none;}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span{margin:0 8px;}

.detail-layout{display:grid;grid-template-columns:240px 1fr;gap:48px;align-items:start;}
@media(max-width:1024px){.detail-layout{grid-template-columns:1fr;}}
.toc{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:24px;position:sticky;top:24px;}
.toc ul{list-style:none;padding:0;margin:0;}
.toc li{margin-bottom:8px;}
.toc a{color:var(--text-2);text-decoration:none;font-size:14px;transition:color .2s;}
.toc a:hover{color:var(--accent);}

.article{max-width:720px;}
.article h2{font-size:24px;margin:40px 0 16px;color:var(--text);font-weight:600;}
.article p{color:var(--text-2);line-height:1.8;margin-bottom:16px;}
.article ul{margin:16px 0;padding-left:24px;}
.article li{color:var(--text-2);line-height:1.8;margin-bottom:8px;}
.article strong{color:var(--text);}

.related-grid{background:var(--surface);border-radius:16px;padding:40px;}
.related-grid h3{font-size:20px;margin-bottom:24px;}

/* ===================== 数据表格 ===================== */
.data-table{overflow-x:auto;margin:16px 0;}
.data-table table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:8px;overflow:hidden;}
.data-table th,.data-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border);}
.data-table th{background:rgba(245,158,11,.1);color:var(--text);font-weight:600;font-size:14px;}
.data-table td{color:var(--text-2);font-size:14px;}
.data-table tr:last-child td{border-bottom:none;}
.data-table tr:hover td{background:rgba(245,158,11,.05);}

/* ===================== 文章 Q&A 问答卡片 ===================== */
.article-qa{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 24px;margin:20px 0;}
.article-qa .qa-q{display:flex;align-items:flex-start;gap:10px;font-size:15px;font-weight:600;color:var(--text);line-height:1.7;margin-bottom:12px;}
.article-qa .qa-q::before{content:'Q';flex-shrink:0;width:26px;height:26px;background:var(--accent);color:#000;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;}
.article-qa .qa-a{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-2);line-height:1.8;}
.article-qa .qa-a::before{content:'A';flex-shrink:0;width:26px;height:26px;background:rgba(245,158,11,.15);color:var(--accent);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;}
.article h4{font-size:18px;margin:32px 0 12px;color:var(--text);font-weight:600;scroll-margin-top:90px;}

/* ===================== 相关区块样式 ===================== */
.related-section{margin-top:80px;padding:40px;background:var(--surface);border-radius:16px;}
.related-section h3{color:var(--text);margin-bottom:24px;}
.related-section .cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.related-section .case-card,.related-section .faq-card{text-decoration:none;}
.related-section .case-card:hover,.related-section .faq-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.3);}
@media(max-width:768px){.related-section .cards-3{grid-template-columns:1fr;}}

/* 价格卡片按钮固定底部 */
.price-card .price-list{flex:1;}
.price-card .btn{margin-top:auto;}

/* ===================== 右侧固定工具栏 ===================== */
.float-toolbar{position:fixed;right:24px;bottom:120px;z-index:1000;display:flex;flex-direction:column;gap:12px;}
.float-btn{width:48px;height:48px;border-radius:50%;background:var(--card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s;box-shadow:0 4px 12px rgba(0,0,0,.3);text-decoration:none;}
.float-btn:hover{background:var(--accent);border-color:var(--accent);transform:scale(1.1);box-shadow:0 8px 24px rgba(245,158,11,.3);}
.float-btn svg{width:20px;height:20px;color:var(--text);}
.float-btn:hover svg{color:#000;}
.float-btn.wechat{position:relative;}
.float-btn .wechat-qrcode{position:absolute;right:60px;top:50%;transform:translateY(-50%);background:#fff;padding:12px;border-radius:8px;box-shadow:0 4px 16px rgba(0,0,0,.3);display:none;}
.float-btn.wechat:hover .wechat-qrcode{display:block;}
.float-btn.hidden{opacity:0;pointer-events:none;}
@media(max-width:768px){.float-toolbar{right:16px;bottom:80px;}.float-btn{width:40px;height:40px;}}

/* ===================== 联系弹框 ===================== */
.contact-modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:9999;display:none;align-items:center;justify-content:center;backdrop-filter:blur(4px);}
.contact-modal-overlay.open{display:flex;}
.contact-modal{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:40px;max-width:420px;width:90%;text-align:center;position:relative;animation:modalIn .3s ease;}
@keyframes modalIn{from{opacity:0;transform:scale(.9);}to{opacity:1;transform:scale(1);}}
.contact-modal-close{position:absolute;top:16px;right:16px;width:32px;height:32px;border-radius:50%;background:rgba(255,255,255,.1);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text);font-size:20px;transition:background .2s;}
.contact-modal-close:hover{background:rgba(255,255,255,.2);}
.contact-modal h3{font-size:20px;margin-bottom:24px;color:var(--text);}
.contact-modal-section{margin-bottom:24px;}
.contact-modal-section:last-child{margin-bottom:0;}
.contact-modal-label{font-size:12px;color:var(--text-3);margin-bottom:12px;text-transform:uppercase;letter-spacing:1px;}
.contact-modal-phone{font-size:28px;font-weight:700;color:var(--accent);text-decoration:none;letter-spacing:2px;display:inline-block;margin-bottom:8px;}
.contact-modal-phone:hover{color:var(--accent-glow);}
.contact-modal-qr{width:140px;height:140px;border-radius:12px;border:1px solid var(--border);margin:0 auto;background:#fff;padding:8px;display:block;}
.contact-modal-qr img{width:100%;height:100%;object-fit:contain;display:block;}
.contact-modal-note{font-size:13px;color:var(--text-3);margin-top:8px;}

/* ===================== 底部社交按钮 ===================== */
.social-row{display:flex;gap:16px;margin-top:16px;}
.social-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:56px;height:56px;border-radius:12px;background:rgba(255,255,255,.06);border:1px solid var(--border);color:var(--text-2);font-size:11px;cursor:pointer;transition:all .3s;}
.social-btn svg{color:var(--text-2);}
.social-btn:hover{background:var(--accent);border-color:var(--accent);color:#000;}
.social-btn:hover svg{color:#000;}

/* ===================== 悬浮工具栏改为触发弹框 ===================== */
.float-toolbar{position:fixed;right:24px;bottom:80px;z-index:1000;display:flex;flex-direction:column;gap:12px;}
.float-btn{width:48px;height:48px;border-radius:50%;background:var(--card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s;box-shadow:0 4px 12px rgba(0,0,0,.3);text-decoration:none;}
.float-btn:hover{background:var(--accent);border-color:var(--accent);transform:scale(1.1);box-shadow:0 8px 24px rgba(245,158,11,.3);}
.float-btn svg{width:20px;height:20px;color:var(--text);}
.float-btn:hover svg{color:#000;}
.float-btn.hidden{opacity:0;pointer-events:none;}
@media(max-width:768px){.float-toolbar{right:16px;bottom:60px;}.float-btn{width:40px;height:40px;}.float-btn svg{width:16px;height:16px;}}

/* ===================== FAQ 列表样式 ===================== */
.faq-list{display:flex;flex-direction:column;gap:16px;}
.faq-list .faq-card{text-decoration:none;}


/* ===================================================================
   追加：详情页 FAQ 手风琴（<details>/<summary>）
=================================================================== */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 4px 0;
}
.faq-q {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  padding: 14px 28px 14px 0;
  position: relative;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  line-height: 1;
  color: var(--accent);
  transition: transform .2s ease;
}
.faq-item[open] > .faq-q::after { content: "–"; }
.faq-a {
  padding: 0 0 16px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.75;
}

/* ===================================================================
   追加：导航移动端（checkbox 视觉隐藏，纯 CSS 可切换）
=================================================================== */
.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
  border: 0;
  padding: 0;
  margin: -1px;
}
#navToggle:focus-visible ~ .container .hamburger {
  outline: 2px solid var(--accent, #f59e0b);
  outline-offset: 2px;
  border-radius: 6px;
}
#navToggle:checked ~ .mobile-menu { max-height: 600px; }

/* 无 JS 降级 */
.no-js .reveal,
.reveal.is-ready { opacity: 1; transform: none; transition: none; }

/* ===================================================================
   分页样式
=================================================================== */
.xrpagination {
  margin-top: 40px;
  display: flex;
  justify-content: center;
}
.xrpagination .pagination {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 14px;
  flex-wrap: wrap;
}
.xrpagination .pagination > li { display: inline-flex; }
.xrpagination .pagination > li > a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  color: #555;
  text-decoration: none;
  background: #fff;
  transition: all .2s ease;
  white-space: nowrap;
}
.xrpagination .pagination > li > a:hover {
  background: linear-gradient(135deg, #f59e0b, #e67e22);
  color: #fff;
  border-color: transparent;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(245,158,11,.3);
}
.xrpagination .pagination > li.active > a {
  background: linear-gradient(135deg, #f59e0b, #e67e22);
  color: #fff;
  border-color: transparent;
  cursor: default;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(245,158,11,.3);
}
/* 总条数样式 */
.xrpagination .pagination > li:first-child > a {
  font-size: 13px;
  color: #999;
  border-style: dashed;
  border-color: #ddd;
  cursor: default;
  min-width: auto;
  padding: 0 10px;
}
.xrpagination .pagination > li:first-child > a:hover {
  background: #f9f9f9;
  color: #999;
  transform: none;
  box-shadow: none;
}

/* ===================================================================
   城市落地页 city_show（新增样式，追加于此）
=================================================================== */
.city-main { padding: 0 60px 60px; }
@media (max-width: 1024px) { .city-main { padding: 0 24px 60px; } }

/* 痛点 / 引言（落地页左对齐布局：取消全局 700px 限宽与自动居中） */
.city-main .section-sub { max-width: none; margin-left: 0; margin-right: 0; }
.city-intro { margin-top: 48px; }
.city-intro .section-sub { margin: 16px 0 24px; }
.pain-list {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 24px;
  max-width: 900px; margin: 0 auto;
}
.pain-list li {
  position: relative; padding-left: 24px; color: var(--text-2); font-size: 15px; line-height: 1.6;
}
.pain-list li::before {
  content: "✕"; position: absolute; left: 0; top: 2px; color: #F87171; font-size: 13px;
}
@media (max-width: 640px) { .pain-list { grid-template-columns: 1fr; } }

/* 核心优势 */
.why-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 40px 0;
}
.why-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: all .25s;
  -webkit-border-radius: 16px;
  -moz-border-radius: 16px;
  -ms-border-radius: 16px;
  -o-border-radius: 16px;
}
.why-card:hover { border-color: rgba(245,158,11,.4); transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.3); }
.why-ic { font-size: 32px; margin-bottom: 12px; }
.why-card h3 { font-size: 16px; color: var(--text); margin-bottom: 8px; }
.why-card p { font-size: 14px; color: var(--text-2); line-height: 1.6; }
@media (max-width: 1024px) { .why-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .why-grid { grid-template-columns: 1fr; } }

/* 服务流程 */
.steps { margin: 48px 0; }
.steps-row {
  display: flex; align-items: stretch; justify-content: center; gap: 8px; flex-wrap: wrap;
}
.step-item {
  flex: 1; min-width: 150px; background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px; text-align: center; position: relative;
}
.step-num {
  font-family: 'Noto Serif SC', serif; font-size: 32px; font-weight: 700;
  color: var(--accent); line-height: 1; margin-bottom: 12px;
}
.step-item h4 { font-size: 15px; color: var(--text); margin-bottom: 8px; }
.step-item p { font-size: 13px; color: var(--text-2); line-height: 1.6; }
.step-arrow { display: flex; align-items: center; color: var(--accent); font-size: 22px; font-weight: 700; }
@media (max-width: 768px) { .step-arrow { display: none; } }

/* 落地页 FAQ（复用 .faq-item 基础样式，此处补充间距） */
.city-faq { margin: 48px 0; }
.city-faq .faq-list { max-width: 90%; margin: 0 auto; }

/* 服务地区区块微调 */
.coverage { transition: border-color .25s; }
.coverage:hover { border-color: rgba(245,158,11,.4); }

/* ===================================================================
   导航城市服务下拉（header 城市落地页入口）
=================================================================== */
.nav-dropdown { position: relative; }
.nav-drop {
  position: absolute; top: calc(100% + 12px); left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 240px; max-height: 380px; overflow-y: auto;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 8px; box-shadow: 0 16px 40px rgba(0,0,0,.4);
  opacity: 0; visibility: hidden; transition: all .2s ease; z-index: 100;
  display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
}
/* 悬停桥接：避免鼠标移向下拉面板时经过缝隙导致面板消失 */
.nav-dropdown::before { content: ""; position: absolute; top: 100%; left: 0; right: 0; height: 14px; }
.nav-dropdown:hover .nav-drop { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-drop a {
  display: block; padding: 8px 12px; font-size: 13px; color: var(--text-2);
  text-decoration: none; border-radius: 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  transition: all .15s;
}
.nav-drop a:hover { background: rgba(245,158,11,.12); color: var(--accent); }

/* 移动端城市服务块 */
.mobile-city { border-bottom: 1px solid rgba(45,54,82,.4); }
.mobile-city-label { padding: 14px 24px 6px; font-size: 12px; letter-spacing: 1px; color: var(--text-3); }
.mobile-city a { display: inline-block; padding: 6px 14px; margin: 0 0 10px 24px; font-size: 13px; color: var(--text-2); text-decoration: none; border: 1px solid var(--border); border-radius: 999px; }
.mobile-city a:hover { color: var(--accent); border-color: rgba(245,158,11,.4); }