/* ============================================
   比道 Bidoc — 共享样式层 (Design Contract 实现)
   tech-dark / industrial-precision · 品牌蓝 #00A0E9
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============ Design Tokens ============ */
:root {
  /* Colors — 品牌蓝主色 #0097D7 + 翠绿辅助色 */
  --c-primary: #0097D7;
  --c-primary-hover: #2AB0EA;
  --c-accent: #00D9A3;
  --c-accent-hover: #00F5B8;
  --c-bg: #0A0E14;
  --c-surface: #111821;
  --c-surface-2: #1A2332;
  --c-surface-3: #232E42;
  --c-border: #1E2A3A;
  --c-border-light: #2A3A52;
  --c-text: #E2E8F0;
  --c-text-sub: #94A3B8;
  --c-text-muted: #64748B;
  --c-success: #00D9A3;
  --c-warning: #FBBF24;
  --c-danger: #EF4444;
  --c-danger-light: #F87171;
  --c-brand: #0097D7;

  /* Gradients */
  --g-hero: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,151,215,.08), transparent 70%);
  --g-glow: radial-gradient(circle 400px at 50% 50%, rgba(0,151,215,.12), transparent 70%);
  --g-glow-green: radial-gradient(circle 400px at 50% 50%, rgba(0,217,163,.08), transparent 70%);
  --g-card: linear-gradient(135deg, rgba(26,35,50,.6), rgba(17,24,33,.8));

  /* Fonts */
  --font-display: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', monospace;

  /* Radius */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;

  /* Shadows */
  --sh-sm: 0 2px 8px rgba(0,0,0,.3);
  --sh-md: 0 4px 24px rgba(0,0,0,.4);
  --sh-lg: 0 8px 40px rgba(0,0,0,.5);
  --sh-glow: 0 0 24px rgba(0,151,215,.18);
  --sh-glow-blue: 0 0 24px rgba(0,151,215,.25);

  /* Layout */
  --max-w: 1200px;
  --header-h: 64px;

  /* Motion */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --ease-out: cubic-bezier(0, 0, .2, 1);
}

/* ============ Reset & Base ============ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

/* 网格背景纹理 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 42, 58, .25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 58, .25) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

/* 顶部光晕 */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 600px;
  background: var(--g-hero);
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

::selection {
  background: rgba(0, 217, 163, .25);
  color: var(--c-text);
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: var(--c-border-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-text-muted); }

/* ============ Typography ============ */
.display { font-family: var(--font-display); font-weight: 700; letter-spacing: -.02em; }
.mono { font-family: var(--font-mono); }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -.01em; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

.text-sub { color: var(--c-text-sub); }
.text-muted { color: var(--c-text-muted); }
.text-primary { color: var(--c-primary); }
.text-accent { color: var(--c-accent); }
.text-center { text-align: center; }

/* ============ Layout ============ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 96px 0;
  position: relative;
  z-index: 1;
}

.section-sm { padding: 64px 0; }

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-primary);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 16px;
  padding: 6px 16px;
  background: rgba(0, 217, 163, .08);
  border: 1px solid rgba(0, 217, 163, .2);
  border-radius: 100px;
}

.section-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  box-shadow: 0 0 8px var(--c-primary);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--c-text-sub);
  max-width: 640px;
  margin: 0 auto;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  border: none;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: all .3s var(--ease);
  white-space: nowrap;
  text-decoration: none;
}

.btn svg { width: 18px; height: 18px; stroke-width: 2; }

.btn-sm { height: 36px; padding: 0 16px; font-size: 13px; }
.btn-md { height: 44px; padding: 0 24px; font-size: 15px; }
.btn-lg { height: 52px; padding: 0 32px; font-size: 16px; }

.btn-primary {
  background: var(--c-primary);
  color: #0A0E14;
  font-weight: 600;
}
.btn-primary:hover {
  background: var(--c-primary-hover);
  box-shadow: var(--sh-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border-light);
}
.btn-secondary:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: rgba(0, 217, 163, .05);
}

.btn-ghost {
  background: transparent;
  color: var(--c-text-sub);
}
.btn-ghost:hover { color: var(--c-primary); }

.btn-group { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============ Cards ============ */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: all .3s var(--ease);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border-light), transparent);
}

.card:hover {
  border-color: var(--c-border-light);
  box-shadow: var(--sh-md);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: rgba(0, 217, 163, .1);
  color: var(--c-primary);
}
.card-icon svg { width: 24px; height: 24px; stroke-width: 1.5; }

.card-icon.accent {
  background: rgba(59, 130, 246, .1);
  color: var(--c-accent);
}
.card-icon.warning {
  background: rgba(251, 191, 36, .1);
  color: var(--c-warning);
}
.card-icon.danger {
  background: rgba(239, 68, 68, .1);
  color: var(--c-danger);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-desc {
  color: var(--c-text-sub);
  font-size: 14px;
  line-height: 1.65;
}

/* ============ Tags / Pills ============ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-mono);
}
.tag-primary { background: rgba(0,217,163,.12); color: var(--c-primary); border: 1px solid rgba(0,217,163,.25); }
.tag-accent { background: rgba(59,130,246,.12); color: var(--c-accent); border: 1px solid rgba(59,130,246,.25); }
.tag-warning { background: rgba(251,191,36,.12); color: var(--c-warning); border: 1px solid rgba(251,191,36,.25); }
.tag-danger { background: rgba(239,68,68,.12); color: var(--c-danger-light); border: 1px solid rgba(239,68,68,.25); }

/* ============ Grid ============ */
.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ============ App Shell — Header ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(10, 14, 20, .85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  z-index: 100;
  transition: all .3s var(--ease);
}

.site-header.scrolled {
  background: rgba(10, 14, 20, .95);
  box-shadow: 0 1px 0 var(--c-border);
}

.header-inner {
  max-width: var(--max-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--c-text);
  flex-shrink: 0;
}

.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--c-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.main-nav a {
  position: relative;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--c-text-sub);
  border-radius: var(--r-sm);
  transition: color .3s var(--ease);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: width .3s var(--ease);
}

.main-nav a:hover { color: var(--c-text); }
.main-nav a:hover::after { width: 20px; }

.main-nav a.active {
  color: var(--c-primary);
}
.main-nav a.active::after { width: 20px; }

.nav-cta { margin-left: 16px; }

.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  background: var(--c-surface);
  color: var(--c-text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.mobile-toggle svg { width: 20px; height: 20px; }

@media (max-width: 768px) {
  .main-nav, .nav-cta { display: none; }
  .mobile-toggle { display: flex; }
  
  .main-nav.open {
    display: flex;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    background: rgba(10, 14, 20, .98);
    border-bottom: 1px solid var(--c-border);
  }
  .main-nav.open a { padding: 12px 16px; }
  .main-nav.open a::after { display: none; }
}

/* ============ App Shell — Footer ============ */
.site-footer {
  border-top: 1px solid var(--c-border);
  background: var(--c-surface);
  padding: 64px 0 32px;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 48px;
  margin-bottom: 48px;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { color: var(--c-text-sub); font-size: 14px; max-width: 320px; }

.footer-col h4 {
  font-size: 14px;
  color: var(--c-text);
  margin-bottom: 16px;
  font-family: var(--font-body);
  font-weight: 600;
}

.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: var(--c-text-sub);
  transition: color .3s var(--ease);
}
.footer-col ul li a:hover { color: var(--c-primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--c-border);
  font-size: 13px;
  color: var(--c-text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom a { color: var(--c-text-muted); transition: color .3s; }
.footer-bottom a:hover { color: var(--c-primary); }

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

@media (max-width: 768px) {
  .footer-links { grid-template-columns: 1fr 1fr; }
}

.footer-beian-sep { margin: 0 8px; opacity: .5; }

.footer-cs-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 20px;
}

.footer-cs-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  background: var(--c-surface-2);
  min-width: 0;
}

.footer-cs-qr { position: relative; cursor: default; }

.footer-cs-qr-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
  flex-shrink: 0;
}

.footer-cs-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.footer-cs-text strong {
  font-size: 13px;
  color: var(--c-text);
  font-weight: 600;
}

.footer-cs-text strong a {
  color: inherit;
  text-decoration: none;
}

.footer-cs-text span {
  font-size: 11px;
  color: var(--c-text-muted);
}

.footer-cs-qr-popup {
  display: none;
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  z-index: 20;
  padding: 12px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg, 0 12px 40px rgba(0,0,0,.35));
  text-align: center;
  width: 168px;
}

.footer-cs-qr:hover .footer-cs-qr-popup { display: block; }

.footer-cs-qr-popup-frame {
  width: 140px;
  height: 140px;
  margin: 0 auto 8px;
  padding: 8px;
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-cs-qr-popup-frame img,
.footer-cs-qr-popup img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.footer-cs-qr-popup p {
  font-size: 12px;
  color: var(--c-text-sub);
  margin: 0;
}

.cs-float {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
}

.cs-float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 151, 215, .35);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .2s var(--ease);
}

.cs-float-btn:hover { transform: scale(1.05); }

.cs-float-panel {
  display: none;
  position: absolute;
  right: 0;
  bottom: calc(100% + 12px);
  width: 260px;
  padding: 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg, 0 12px 40px rgba(0,0,0,.35));
}

.cs-float:hover .cs-float-panel,
.cs-float:focus-within .cs-float-panel { display: block; }

.cs-float-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--c-text);
}

.cs-float-qr {
  text-align: center;
  margin-bottom: 12px;
}

.cs-float-qr-frame {
  width: 120px;
  height: 120px;
  margin: 0 auto 6px;
  padding: 8px;
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cs-float-qr-frame img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.cs-float-qr p {
  font-size: 12px;
  color: var(--c-text-muted);
  margin: 0;
}

.cs-float-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-radius: var(--r-sm);
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--c-border);
  margin-top: 8px;
}

.cs-float-item:hover { border-color: var(--c-primary); }

.cs-float-item-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cs-float-item-text strong { font-size: 13px; }
.cs-float-item-text span { font-size: 12px; color: var(--c-text-sub); }

.dl-pack-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.dl-pack-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-text-muted);
  text-align: center;
}

/* ============ Hero ============ */
.hero {
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 217, 163, .08);
  border: 1px solid rgba(0, 217, 163, .2);
  border-radius: 100px;
  font-size: 13px;
  color: var(--c-primary);
  font-family: var(--font-mono);
  margin-bottom: 24px;
  animation: fadeUp .6s var(--ease) both;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  box-shadow: 0 0 8px var(--c-primary);
  animation: pulse 2s ease infinite;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.15;
  margin-bottom: 24px;
  animation: fadeUp .6s var(--ease) .1s both;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--c-text-sub);
  max-width: 640px;
  margin: 0 auto 40px;
  animation: fadeUp .6s var(--ease) .2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp .6s var(--ease) .3s both;
}

/* ============ Stats ============ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}
@media (max-width: 768px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }

.stat-item { text-align: center; }
.stat-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-value .suffix { font-size: .5em; color: var(--c-text-sub); }
.stat-label { font-size: 14px; color: var(--c-text-sub); }

/* ============ Feature Grid ============ */
.feature-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: all .3s var(--ease);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
  transition: left .6s var(--ease);
}

.feature-card:hover {
  border-color: var(--c-border-light);
  background: var(--c-surface-2);
  transform: translateY(-3px);
  box-shadow: var(--sh-md);
}
.feature-card:hover::after { left: 100%; }

/* ============ Dimension Showcase ============ */
.dimension-card {
  background: var(--g-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 40px;
  position: relative;
  overflow: hidden;
  transition: all .3s var(--ease);
}

.dimension-card:hover {
  border-color: var(--c-border-light);
  box-shadow: var(--sh-md);
}

.dimension-card .dim-glow {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: var(--g-glow);
  pointer-events: none;
}

.dimension-number {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--c-text-muted);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}

/* ============ Step / Timeline ============ */
.step-card {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  transition: all .3s var(--ease);
}

.step-card:hover {
  border-color: var(--c-border-light);
  background: var(--c-surface-2);
}

.step-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, rgba(0,217,163,.15), rgba(59,130,246,.15));
  border: 1px solid rgba(0,217,163,.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-primary);
}

/* ============ Code Block ============ */
.code-block {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: 20px 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  position: relative;
}

.code-block::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-primary);
  border-radius: var(--r-md) 0 0 var(--r-md);
}

.code-comment { color: var(--c-text-muted); }
.code-key { color: var(--c-accent); }
.code-string { color: var(--c-primary); }
.code-number { color: var(--c-warning); }

/* ============ Comparison Table ============ */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
}

.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--c-border);
  font-size: 14px;
}

.compare-table th {
  background: var(--c-surface-2);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--c-text-sub);
}

.compare-table tr:last-child td { border-bottom: none; }

.compare-table .col-highlight {
  background: rgba(0, 217, 163, .03);
}

.check-icon { color: var(--c-primary); }
.x-icon { color: var(--c-text-muted); }

/* ============ Download Card ============ */
.download-card {
  background: var(--g-card);
  border: 1px solid var(--c-border-light);
  border-radius: var(--r-xl);
  padding: 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.download-card::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 400px;
  background: var(--g-glow-green);
  pointer-events: none;
}

/* ============ FAQ ============ */
.faq-item {
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .3s;
}

.faq-item:hover { border-color: var(--c-border-light); }

.faq-item summary {
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 20px;
  color: var(--c-primary);
  transition: transform .3s;
  flex-shrink: 0;
}

.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item .faq-answer {
  padding: 0 24px 20px;
  color: var(--c-text-sub);
  font-size: 14px;
  line-height: 1.7;
}

/* ============ Version Badge ============ */
.version-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--c-border);
}

.version-item:last-child { border-bottom: none; }

.version-tag {
  flex-shrink: 0;
  width: 80px;
}

/* ============ Animations ============ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ Utilities ============ */
.mt-0 { margin-top: 0; } .mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; } .mt-48 { margin-top: 48px; }
.mb-0 { margin-bottom: 0; } .mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; } .mb-32 { margin-bottom: 32px; } .mb-48 { margin-bottom: 48px; }
.flex { display: flex; } .items-center { align-items: center; }
.gap-8 { gap: 8px; } .gap-16 { gap: 16px; } .gap-24 { gap: 24px; }
.flex-wrap { flex-wrap: wrap; }
.text-center { text-align: center; }
.relative { position: relative; }
.hidden { display: none; }

/* ============ Responsive ============ */
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
  .hero { padding: 96px 0 64px; }
  .download-card { padding: 32px 24px; }
  .dimension-card { padding: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ============================================
   品牌更新：BidChecker → 比道 Bidoc
   品牌主色 #00A0E9（科技蓝，与LOGO一致）
   ============================================ */

/* LOGO 图片支持 */
.logo-icon {
  width: 32px !important;
  height: 32px !important;
  object-fit: contain;
  flex-shrink: 0;
}

.logo-text-en {
  font-size: 14px;
  color: var(--c-text-sub);
  font-weight: 500;
  margin-left: 2px;
}

/* 颜色覆盖：旧翠绿→品牌蓝 */
.hero-badge {
  background: rgba(0, 160, 233, .08);
  border-color: rgba(0, 160, 233, .2);
}

.step-num {
  background: linear-gradient(135deg, rgba(0,160,233,.15), rgba(0,217,163,.10));
  border-color: rgba(0,160,233,.2);
  color: var(--c-primary);
}

.compare-table .col-highlight {
  background: rgba(0, 160, 233, .04);
}

/* ============ 用户评价卡片 ============ */
.testimonial-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: all .3s var(--ease);
  position: relative;
  overflow: hidden;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: -10px;
  right: 20px;
  font-size: 72px;
  font-family: var(--font-display);
  color: var(--c-border-light);
  line-height: 1;
}

.testimonial-card:hover {
  border-color: var(--c-border-light);
  background: var(--c-surface-2);
  transform: translateY(-2px);
  box-shadow: var(--sh-md);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: #0A0E14;
  flex-shrink: 0;
}

.testimonial-info h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
}

.testimonial-info p {
  font-size: 13px;
  color: var(--c-text-sub);
}

.testimonial-rating {
  display: flex;
  gap: 2px;
  margin-bottom: 12px;
}

.testimonial-rating .star {
  width: 16px;
  height: 16px;
  color: var(--c-warning);
}

.testimonial-content {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-text-sub);
  position: relative;
  z-index: 1;
}

.testimonial-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}

.testimonial-date {
  font-size: 12px;
  color: var(--c-text-muted);
  font-family: var(--font-mono);
}

/* ============ 软文/案例卡片 ============ */
.article-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 0;
  transition: all .3s var(--ease);
  overflow: hidden;
  cursor: pointer;
}

.article-card:hover {
  border-color: var(--c-border-light);
  box-shadow: var(--sh-md);
  transform: translateY(-3px);
}

.article-cover {
  height: 180px;
  background: var(--g-card);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--c-border);
}

.article-cover::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--g-glow);
  opacity: .5;
}

.article-cover .article-cover-icon {
  width: 48px;
  height: 48px;
  color: var(--c-primary);
  position: relative;
  z-index: 1;
}

.article-body {
  padding: 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--c-text-muted);
  font-family: var(--font-mono);
}

.article-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  color: var(--c-text);
  transition: color .3s;
}

.article-card:hover .article-title {
  color: var(--c-primary);
}

.article-excerpt {
  font-size: 13px;
  color: var(--c-text-sub);
  line-height: 1.65;
  margin-bottom: 16px;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--c-text-muted);
}

/* ============ 评价统计条 ============ */
.rating-bar {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 32px 40px;
  background: var(--g-card);
  border: 1px solid var(--c-border-light);
  border-radius: var(--r-xl);
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.rating-big {
  text-align: center;
  flex-shrink: 0;
}

.rating-big .rating-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--c-warning);
  line-height: 1;
}

.rating-big .rating-stars {
  display: flex;
  gap: 2px;
  justify-content: center;
  margin: 8px 0;
}

.rating-big .rating-stars .star {
  width: 20px;
  height: 20px;
  color: var(--c-warning);
}

.rating-big .rating-label {
  font-size: 13px;
  color: var(--c-text-sub);
}

.rating-divider {
  width: 1px;
  height: 60px;
  background: var(--c-border);
}

.rating-distribution {
  flex: 1;
  min-width: 240px;
}

.rating-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.rating-row .rating-label {
  font-size: 13px;
  color: var(--c-text-sub);
  width: 40px;
}

.rating-row .rating-bar-bg {
  flex: 1;
  height: 8px;
  background: var(--c-bg);
  border-radius: 4px;
  overflow: hidden;
}

.rating-row .rating-bar-fill {
  height: 100%;
  background: var(--c-warning);
  border-radius: 4px;
}

.rating-row .rating-count {
  font-size: 13px;
  color: var(--c-text-muted);
  font-family: var(--font-mono);
  width: 32px;
  text-align: right;
}

/* ============ 口号展示 ============ */
.slogan-section {
  text-align: center;
  padding: 80px 0;
  position: relative;
}

.slogan-main {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
  letter-spacing: .05em;
}

.slogan-sub {
  font-size: 1rem;
  color: var(--c-text-sub);
  font-family: var(--font-mono);
  letter-spacing: .1em;
}

/* ============ 风格变体 ============ */

/* Light 风格变体 */
body.theme-light {
  --c-bg: #F8FAFC;
  --c-surface: #FFFFFF;
  --c-surface-2: #F1F5F9;
  --c-surface-3: #E2E8F0;
  --c-border: #E2E8F0;
  --c-border-light: #CBD5E1;
  --c-text: #0F172A;
  --c-text-sub: #475569;
  --c-text-muted: #94A3B8;
  background-color: var(--c-bg);
  color: var(--c-text);
}

body.theme-light::before {
  background-image:
    linear-gradient(rgba(203, 213, 225, .4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(203, 213, 225, .4) 1px, transparent 1px);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
}

body.theme-light::after {
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,160,233,.08), transparent 70%);
}

body.theme-light .site-header {
  background: rgba(248, 250, 252, .85);
  border-bottom-color: var(--c-border);
}

body.theme-light .testimonial-card,
body.theme-light .feature-card,
body.theme-light .step-card,
body.theme-light .article-card {
  background: var(--c-surface);
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}

body.theme-light .code-block {
  background: #F1F5F9;
}

body.theme-light .site-footer {
  background: var(--c-surface);
}

body.theme-light .hero-badge {
  background: rgba(0, 160, 233, .06);
}

body.theme-light .rating-bar {
  background: var(--c-surface);
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}

/* Glow 风格变体 */
body.theme-glow {
  --c-bg: #060912;
  --c-surface: #0D1117;
  --c-surface-2: #161B2E;
  --c-surface-3: #1E2540;
  --c-border: #1A2138;
  --c-border-light: #2A3458;
}

body.theme-glow::before {
  background-image:
    linear-gradient(rgba(0, 160, 233, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 160, 233, .08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 30%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 30%, black 20%, transparent 80%);
}

body.theme-glow::after {
  background: 
    radial-gradient(ellipse 60% 50% at 30% 0%, rgba(0,160,233,.12), transparent 60%),
    radial-gradient(ellipse 60% 50% at 70% 0%, rgba(99,102,241,.08), transparent 60%);
  height: 800px;
}

body.theme-glow .hero h1 .gradient-text {
  background: linear-gradient(135deg, #00A0E9, #6366F1, #00D9A3);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
  to { background-position: 200% center; }
}

body.theme-glow .card,
body.theme-glow .feature-card,
body.theme-glow .testimonial-card {
  background: linear-gradient(135deg, rgba(22,27,46,.8), rgba(13,17,23,.9));
  border-color: var(--c-border);
}

body.theme-glow .btn-primary {
  box-shadow: 0 0 20px rgba(0,160,233,.3);
}

body.theme-glow .dimension-card .dim-glow {
  background: radial-gradient(circle 400px at 50% 50%, rgba(0,160,233,.12), transparent 70%);
}

/* Brand 深色品牌增强版 — 以LOGO主色 #0097D7 为视觉核心 */
body.theme-brand {
  --c-bg: #050B14;
  --c-surface: #0D1623;
  --c-surface-2: #132035;
  --c-surface-3: #1A2C48;
  --c-border: #1E3554;
  --c-border-light: #2A4A72;
  --c-text: #E8F2FC;
  --c-text-sub: #8AB4D9;
  --c-text-muted: #5A8AB8;
  --c-primary: #0097D7;
  --c-primary-hover: #18B0F0;
  --c-accent: #00D9A3;
  background: 
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(0,151,215,.15), transparent 60%),
    linear-gradient(180deg, #050B14 0%, #071020 50%, #050B14 100%);
  color: var(--c-text);
  min-height: 100vh;
}

body.theme-brand::before {
  background-image:
    linear-gradient(rgba(0, 151, 215, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 151, 215, .06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 100% 70% at 50% 30%, black 15%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 100% 70% at 50% 30%, black 15%, transparent 75%);
  opacity: .8;
}

body.theme-brand::after {
  background: 
    radial-gradient(ellipse 40% 35% at 15% 15%, rgba(0,151,215,.25), transparent 60%),
    radial-gradient(ellipse 35% 30% at 85% 20%, rgba(0,217,163,.12), transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(0,151,215,.1), transparent 60%);
  height: 100vh;
}

/* Header */
body.theme-brand .site-header {
  background: rgba(5, 11, 20, .8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 151, 215, .2);
}

body.theme-brand .site-header.scrolled {
  background: rgba(5, 11, 20, .92);
  border-bottom-color: rgba(0, 151, 215, .3);
  box-shadow: 0 4px 30px rgba(0, 151, 215, .1);
}

/* Hero */
body.theme-brand .hero h1 {
  color: var(--c-text);
}

body.theme-brand .hero h1 .gradient-text {
  background: linear-gradient(135deg, #0097D7 0%, #00B8E6 40%, #00D9A3 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3.5s linear infinite;
  filter: drop-shadow(0 0 30px rgba(0,151,215,.4));
}

body.theme-brand .hero p {
  color: var(--c-text-sub);
}

/* Section eyebrow */
body.theme-brand .section-eyebrow {
  color: var(--c-primary);
  background: rgba(0, 151, 215, .1);
  border: 1px solid rgba(0, 151, 215, .25);
  letter-spacing: .15em;
}

body.theme-brand .section-title {
  color: var(--c-text);
}

body.theme-brand .section-desc {
  color: var(--c-text-sub);
}

/* Cards — 品牌色边框+光晕 */
body.theme-brand .card,
body.theme-brand .feature-card,
body.theme-brand .testimonial-card,
body.theme-brand .step-card,
body.theme-brand .value-card,
body.theme-brand .scenario-card,
body.theme-brand .article-card {
  background: linear-gradient(145deg, rgba(13,22,35,.9), rgba(10,17,28,.95));
  border: 1px solid rgba(0, 151, 215, .2);
  transition: all .35s var(--ease);
  position: relative;
  overflow: hidden;
}

body.theme-brand .card::before,
body.theme-brand .feature-card::before,
body.theme-brand .testimonial-card::before,
body.theme-brand .step-card::before,
body.theme-brand .value-card::before,
body.theme-brand .scenario-card::before,
body.theme-brand .article-card::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
  opacity: 0;
  transition: all .6s var(--ease);
}

body.theme-brand .card:hover::before,
body.theme-brand .feature-card:hover::before,
body.theme-brand .testimonial-card:hover::before,
body.theme-brand .step-card:hover::before,
body.theme-brand .value-card:hover::before,
body.theme-brand .scenario-card:hover::before,
body.theme-brand .article-card:hover::before {
  left: 100%;
  opacity: 1;
}

body.theme-brand .card:hover,
body.theme-brand .feature-card:hover,
body.theme-brand .testimonial-card:hover,
body.theme-brand .step-card:hover,
body.theme-brand .value-card:hover,
body.theme-brand .scenario-card:hover,
body.theme-brand .article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 151, 215, .45);
  box-shadow: 
    0 12px 40px rgba(0, 151, 215, .15),
    0 0 0 1px rgba(0, 151, 215, .1),
    inset 0 1px 0 rgba(0, 151, 215, .1);
}

body.theme-brand .card-title {
  color: var(--c-text);
}

body.theme-brand .card-desc {
  color: var(--c-text-sub);
}

/* Value cards */
body.theme-brand .value-icon {
  background: linear-gradient(135deg, rgba(0,151,215,.2), rgba(0,217,163,.1));
  color: var(--c-primary);
  box-shadow: 0 0 20px rgba(0, 151, 215, .2);
}

body.theme-brand .value-title {
  color: var(--c-text);
}

body.theme-brand .value-desc {
  color: var(--c-text-sub);
}

/* Dimension cards */
body.theme-brand .dimension-card {
  background: linear-gradient(160deg, rgba(13,22,35,.95), rgba(8,15,26,.98));
  border: 1px solid rgba(0, 151, 215, .22);
  position: relative;
  overflow: hidden;
}

body.theme-brand .dimension-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-primary), var(--c-accent), transparent);
  opacity: 0;
  transition: opacity .35s var(--ease);
}

body.theme-brand .dimension-card:hover::before {
  opacity: 1;
}

body.theme-brand .dimension-card:hover {
  border-color: rgba(0, 151, 215, .5);
  box-shadow: 
    0 16px 50px rgba(0, 151, 215, .18),
    0 0 30px rgba(0, 151, 215, .08);
  transform: translateY(-4px);
}

body.theme-brand .dimension-card .dimension-number {
  -webkit-text-stroke: 1.5px var(--c-primary);
  opacity: .12;
  font-size: 42px;
  top: 12px;
  right: 16px;
}

body.theme-brand .dimension-card .dim-glow {
  background: radial-gradient(circle 300px at 30% 30%, rgba(0,151,215,.15), transparent 65%);
  opacity: .6;
}

body.theme-brand .dimension-metrics {
  border-top: 1px solid rgba(0, 151, 215, .15);
}

body.theme-brand .dim-metric-value {
  color: var(--c-primary);
  text-shadow: 0 0 20px rgba(0, 151, 215, .3);
}

body.theme-brand .dim-metric-label {
  color: var(--c-text-muted);
}

body.theme-brand .dim-progress {
  background: rgba(0, 151, 215, .1);
  height: 5px;
  border-radius: 3px;
}

body.theme-brand .dim-progress-fill {
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  box-shadow: 0 0 10px rgba(0, 151, 215, .5);
  border-radius: 3px;
}

/* Product mockup */
body.theme-brand .product-mockup {
  background: linear-gradient(145deg, #0D1623, #08101D);
  border: 1px solid rgba(0, 151, 215, .25);
  box-shadow: 
    0 30px 80px rgba(0, 151, 215, .2),
    0 10px 30px rgba(0, 0, 0, .4),
    inset 0 1px 0 rgba(0, 151, 215, .1);
}

body.theme-brand .product-mockup-caption {
  background: linear-gradient(180deg, transparent, rgba(0, 151, 215, .12));
  border-top: 1px solid rgba(0, 151, 215, .2);
}

/* Screen selector */
body.theme-brand .screen-dot {
  background: rgba(0, 151, 215, .08);
  color: var(--c-text-sub);
  border: 1px solid rgba(0, 151, 215, .2);
  transition: all .3s var(--ease);
}

body.theme-brand .screen-dot:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: rgba(0, 151, 215, .12);
}

body.theme-brand .screen-dot.active {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(0, 151, 215, .4);
}

/* Buttons */
body.theme-brand .btn-primary {
  background: linear-gradient(135deg, #0097D7, #00B8E6);
  box-shadow: 0 4px 20px rgba(0, 151, 215, .4);
  border: none;
  position: relative;
  overflow: hidden;
}

body.theme-brand .btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  transition: left .5s var(--ease);
}

body.theme-brand .btn-primary:hover::before {
  left: 100%;
}

body.theme-brand .btn-primary:hover {
  box-shadow: 0 6px 30px rgba(0, 151, 215, .55);
  transform: translateY(-2px);
}

body.theme-brand .btn-secondary {
  background: rgba(0, 151, 215, .08);
  border: 1px solid rgba(0, 151, 215, .35);
  color: var(--c-primary);
}

body.theme-brand .btn-secondary:hover {
  background: rgba(0, 151, 215, .15);
  border-color: var(--c-primary);
  box-shadow: 0 0 20px rgba(0, 151, 215, .2);
}

body.theme-brand .btn-ghost {
  color: var(--c-primary);
  border-color: rgba(0, 151, 215, .3);
}

body.theme-brand .btn-ghost:hover {
  background: rgba(0, 151, 215, .08);
  border-color: var(--c-primary);
}

/* Download card */
body.theme-brand .download-card {
  background: 
    radial-gradient(ellipse 60% 80% at 50% 100%, rgba(0,217,163,.15), transparent 60%),
    linear-gradient(135deg, #0066A0, #0097D7, #00B8E6);
  border: 1px solid rgba(0, 151, 215, .4);
  box-shadow: 
    0 20px 60px rgba(0, 151, 215, .3),
    inset 0 1px 0 rgba(255,255,255,.1);
  color: #fff;
}

body.theme-brand .download-card .section-title,
body.theme-brand .download-card .section-desc,
body.theme-brand .download-card .section-eyebrow {
  color: #fff;
}

body.theme-brand .download-card .section-eyebrow {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.2);
}

body.theme-brand .download-card .btn-primary {
  background: #fff;
  color: var(--c-primary);
  box-shadow: 0 4px 20px rgba(0,0,0,.2);
}

body.theme-brand .download-card .btn-primary:hover {
  box-shadow: 0 6px 30px rgba(0,0,0,.3);
}

body.theme-brand .download-card .btn-ghost {
  color: #fff;
  border-color: rgba(255,255,255,.4);
}

body.theme-brand .download-card .btn-ghost:hover {
  background: rgba(255,255,255,.1);
}

/* Compare table */
body.theme-brand .compare-table {
  background: rgba(13, 22, 35, .8);
  border: 1px solid rgba(0, 151, 215, .2);
  box-shadow: 0 8px 30px rgba(0, 151, 215, .1);
}

body.theme-brand .compare-table th {
  background: linear-gradient(180deg, rgba(0,151,215,.12), rgba(0,151,215,.04));
  color: var(--c-text);
  border-bottom: 2px solid rgba(0, 151, 215, .3);
}

body.theme-brand .compare-table td {
  border-bottom: 1px solid rgba(0, 151, 215, .1);
  color: var(--c-text-sub);
}

body.theme-brand .compare-table .col-highlight {
  background: rgba(0, 151, 215, .06);
}

/* Footer */
body.theme-brand .site-footer {
  background: linear-gradient(180deg, transparent, rgba(0, 151, 215, .05));
  border-top: 1px solid rgba(0, 151, 215, .18);
  color: var(--c-text-sub);
}

body.theme-brand .footer-bottom {
  border-top-color: rgba(0, 151, 215, .15);
}

/* Step cards */
body.theme-brand .step-num {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 151, 215, .35);
}

/* Scenario cards */
body.theme-brand .scenario-icon {
  background: linear-gradient(135deg, rgba(0,151,215,.2), rgba(0,217,163,.1));
  color: var(--c-primary);
  box-shadow: 0 0 20px rgba(0, 151, 215, .15);
}

/* Tags */
body.theme-brand .tag {
  background: rgba(0, 151, 215, .1);
  color: var(--c-primary);
  border: 1px solid rgba(0, 151, 215, .25);
}

body.theme-brand .tag-accent {
  background: rgba(0, 217, 163, .1);
  color: var(--c-accent);
  border-color: rgba(0, 217, 163, .25);
}

body.theme-brand .tag-warning {
  background: rgba(251, 191, 36, .1);
  color: #FBBF24;
  border-color: rgba(251, 191, 36, .25);
}

body.theme-brand .tag-danger {
  background: rgba(239, 68, 68, .1);
  color: #EF4444;
  border-color: rgba(239, 68, 68, .25);
}

/* Card icons */
body.theme-brand .card-icon {
  background: linear-gradient(135deg, rgba(0,151,215,.2), rgba(0,217,163,.08));
  color: var(--c-primary);
  box-shadow: 0 0 20px rgba(0, 151, 215, .15);
}

body.theme-brand .card-icon.accent {
  background: linear-gradient(135deg, rgba(0,217,163,.18), rgba(0,151,215,.08));
  color: var(--c-accent);
  box-shadow: 0 0 20px rgba(0, 217, 163, .15);
}

body.theme-brand .card-icon.warning {
  background: linear-gradient(135deg, rgba(251,191,36,.18), rgba(255,107,53,.08));
  color: #FBBF24;
  box-shadow: 0 0 20px rgba(251, 191, 36, .15);
}

body.theme-brand .card-icon.danger {
  background: linear-gradient(135deg, rgba(239,68,68,.18), rgba(255,107,53,.08));
  color: #EF4444;
  box-shadow: 0 0 20px rgba(239, 68, 68, .15);
}

/* Code block */
body.theme-brand .code-block {
  background: rgba(0, 151, 215, .06);
  border: 1px solid rgba(0, 151, 215, .15);
}

/* FAQ */
body.theme-brand .faq-item {
  background: rgba(13, 22, 35, .7);
  border: 1px solid rgba(0, 151, 215, .18);
}

body.theme-brand .faq-item[open] {
  border-color: rgba(0, 151, 215, .35);
  box-shadow: 0 4px 20px rgba(0, 151, 215, .1);
}

/* Rating bar */
body.theme-brand .rating-bar {
  background: linear-gradient(145deg, rgba(13,22,35,.9), rgba(10,17,28,.95));
  border: 1px solid rgba(0, 151, 215, .2);
  box-shadow: 0 8px 30px rgba(0, 151, 215, .1);
}

/* Article cards */
body.theme-brand .article-card .article-meta {
  color: var(--c-text-muted);
}

/* 品牌版LOGO — 使用蓝色原色LOGO */
body.theme-brand .logo .logo-icon {
  content: url('../assets/logo-color-128.png');
}

body.theme-brand .footer-brand .logo .logo-icon {
  content: url('../assets/logo-color-128.png');
}

/* Tech 亮色科技风格变体 — 以LOGO主色为核心 */
body.theme-tech {
  --c-bg: #F0F7FF;
  --c-surface: #FFFFFF;
  --c-surface-2: #E8F4FE;
  --c-surface-3: #D6EBFD;
  --c-border: #C2E0FA;
  --c-border-light: #A8D4F7;
  --c-text: #0A2540;
  --c-text-sub: #2D5B8A;
  --c-text-muted: #6B9DC7;
  --c-primary: #0097D7;
  --c-primary-hover: #00A8EE;
  --c-accent: #00D9A3;
  background: linear-gradient(180deg, #F0F7FF 0%, #E6F2FF 50%, #F5FAFF 100%);
  color: var(--c-text);
  min-height: 100vh;
}

body.theme-tech::before {
  background-image:
    linear-gradient(rgba(0, 151, 215, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 151, 215, .08) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 25%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 25%, black 20%, transparent 75%);
}

body.theme-tech::after {
  background: 
    radial-gradient(ellipse 50% 45% at 20% 0%, rgba(0,151,215,.18), transparent 60%),
    radial-gradient(ellipse 50% 45% at 80% 0%, rgba(0,217,163,.10), transparent 60%),
    radial-gradient(ellipse 60% 30% at 50% 100%, rgba(0,151,215,.08), transparent 60%);
  height: 100vh;
}

body.theme-tech .site-header {
  background: rgba(240, 247, 255, .85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 151, 215, .15);
}

body.theme-tech .logo-text {
  color: var(--c-text);
}

body.theme-tech .main-nav a {
  color: var(--c-text-sub);
}

body.theme-tech .main-nav a:hover {
  color: var(--c-primary);
}

body.theme-tech .main-nav a.active {
  color: var(--c-primary);
}

body.theme-tech .hero h1 {
  color: var(--c-text);
}

body.theme-tech .hero h1 .gradient-text {
  background: linear-gradient(135deg, #0097D7, #00B8E6, #00D9A3);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 4s linear infinite;
}

body.theme-tech .hero p {
  color: var(--c-text-sub);
}

body.theme-tech .section-eyebrow {
  color: var(--c-primary);
  background: rgba(0, 151, 215, .08);
}

body.theme-tech .section-title {
  color: var(--c-text);
}

body.theme-tech .section-desc {
  color: var(--c-text-sub);
}

body.theme-tech .card,
body.theme-tech .feature-card,
body.theme-tech .testimonial-card,
body.theme-tech .step-card,
body.theme-tech .value-card,
body.theme-tech .scenario-card,
body.theme-tech .article-card,
body.theme-tech .dimension-card {
  background: linear-gradient(145deg, #FFFFFF, #F5FAFF);
  border: 1px solid rgba(0, 151, 215, .12);
  box-shadow: 
    0 4px 20px rgba(0, 151, 215, .06),
    0 1px 3px rgba(0, 151, 215, .04);
  transition: all .35s var(--ease);
}

body.theme-tech .card:hover,
body.theme-tech .feature-card:hover,
body.theme-tech .testimonial-card:hover,
body.theme-tech .step-card:hover,
body.theme-tech .value-card:hover,
body.theme-tech .scenario-card:hover,
body.theme-tech .article-card:hover,
body.theme-tech .dimension-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 151, 215, .3);
  box-shadow: 
    0 12px 40px rgba(0, 151, 215, .12),
    0 4px 12px rgba(0, 151, 215, .08);
}

body.theme-tech .card-title {
  color: var(--c-text);
}

body.theme-tech .card-desc {
  color: var(--c-text-sub);
}

body.theme-tech .value-icon {
  background: linear-gradient(135deg, rgba(0,151,215,.12), rgba(0,217,163,.08));
  color: var(--c-primary);
}

body.theme-tech .dimension-card .dimension-number {
  -webkit-text-stroke: 1.5px var(--c-primary);
  opacity: .1;
}

body.theme-tech .dimension-card .dim-glow {
  background: radial-gradient(circle 300px at 50% 50%, rgba(0,151,215,.08), transparent 70%);
}

body.theme-tech .dimension-metrics {
  border-top-color: rgba(0, 151, 215, .1);
}

body.theme-tech .dim-metric-value {
  color: var(--c-primary);
}

body.theme-tech .dim-progress {
  background: rgba(0, 151, 215, .1);
}

body.theme-tech .product-mockup {
  background: linear-gradient(145deg, #FFFFFF, #E8F4FE);
  border: 1px solid rgba(0, 151, 215, .15);
  box-shadow: 
    0 20px 60px rgba(0, 151, 215, .15),
    0 8px 24px rgba(0, 151, 215, .1);
}

body.theme-tech .product-mockup-caption {
  background: linear-gradient(180deg, transparent, rgba(0, 151, 215, .08));
  border-top: 1px solid rgba(0, 151, 215, .1);
}

body.theme-tech .screen-dot {
  background: rgba(0, 151, 215, .08);
  color: var(--c-text-sub);
  border: 1px solid rgba(0, 151, 215, .15);
}

body.theme-tech .screen-dot:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

body.theme-tech .screen-dot.active {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
  box-shadow: 0 4px 12px rgba(0, 151, 215, .3);
}

body.theme-tech .btn-primary {
  background: linear-gradient(135deg, #0097D7, #00B8E6);
  box-shadow: 0 4px 16px rgba(0, 151, 215, .35);
}

body.theme-tech .btn-primary:hover {
  box-shadow: 0 6px 24px rgba(0, 151, 215, .45);
}

body.theme-tech .btn-secondary {
  background: #fff;
  border: 1px solid rgba(0, 151, 215, .3);
  color: var(--c-primary);
}

body.theme-tech .btn-secondary:hover {
  background: rgba(0, 151, 215, .05);
  border-color: var(--c-primary);
}

body.theme-tech .btn-ghost {
  color: var(--c-primary);
  border-color: rgba(0, 151, 215, .3);
}

body.theme-tech .btn-ghost:hover {
  background: rgba(0, 151, 215, .06);
}

body.theme-tech .download-card {
  background: linear-gradient(135deg, #0097D7, #00B8E6);
  color: #fff;
}

body.theme-tech .download-card .section-title,
body.theme-tech .download-card .section-desc,
body.theme-tech .download-card .section-eyebrow {
  color: #fff;
}

body.theme-tech .download-card .section-eyebrow {
  background: rgba(255,255,255,.15);
}

body.theme-tech .compare-table {
  background: #fff;
  border: 1px solid rgba(0, 151, 215, .12);
  box-shadow: 0 4px 20px rgba(0, 151, 215, .06);
}

body.theme-tech .compare-table th {
  background: linear-gradient(180deg, rgba(0,151,215,.05), rgba(0,151,215,.02));
  color: var(--c-text);
  border-bottom: 2px solid rgba(0, 151, 215, .2);
}

body.theme-tech .compare-table td {
  border-bottom: 1px solid rgba(0, 151, 215, .08);
  color: var(--c-text-sub);
}

body.theme-tech .compare-table .col-highlight {
  background: rgba(0, 151, 215, .04);
}

body.theme-tech .site-footer {
  background: linear-gradient(180deg, transparent, rgba(0, 151, 215, .04));
  border-top: 1px solid rgba(0, 151, 215, .1);
  color: var(--c-text-sub);
}

body.theme-tech .footer-bottom {
  border-top-color: rgba(0, 151, 215, .1);
}

body.theme-tech .step-num {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 151, 215, .25);
}

body.theme-tech .scenario-icon {
  background: linear-gradient(135deg, rgba(0,151,215,.12), rgba(0,217,163,.08));
  color: var(--c-primary);
}

body.theme-tech .rating-bar {
  background: #fff;
  border: 1px solid rgba(0, 151, 215, .12);
  box-shadow: 0 4px 20px rgba(0, 151, 215, .06);
}

body.theme-tech .faq-item {
  background: #fff;
  border: 1px solid rgba(0, 151, 215, .12);
}

body.theme-tech .code-block {
  background: rgba(0, 151, 215, .04);
  border: 1px solid rgba(0, 151, 215, .1);
}

body.theme-tech .tag {
  background: rgba(0, 151, 215, .08);
  color: var(--c-primary);
  border: 1px solid rgba(0, 151, 215, .15);
}

body.theme-tech .tag-accent {
  background: rgba(0, 217, 163, .1);
  color: #00A882;
  border-color: rgba(0, 217, 163, .2);
}

body.theme-tech .tag-warning {
  background: rgba(255, 170, 0, .1);
  color: #C88600;
  border-color: rgba(255, 170, 0, .2);
}

body.theme-tech .tag-danger {
  background: rgba(255, 71, 87, .08);
  color: #E5383B;
  border-color: rgba(255, 71, 87, .15);
}

body.theme-tech .card-icon {
  background: linear-gradient(135deg, rgba(0,151,215,.12), rgba(0,217,163,.06));
  color: var(--c-primary);
}

body.theme-tech .card-icon.accent {
  background: linear-gradient(135deg, rgba(0,217,163,.12), rgba(0,151,215,.06));
  color: #00A882;
}

body.theme-tech .card-icon.warning {
  background: linear-gradient(135deg, rgba(255,170,0,.12), rgba(255,107,53,.06));
  color: #C88600;
}

body.theme-tech .card-icon.danger {
  background: linear-gradient(135deg, rgba(255,71,87,.12), rgba(255,107,53,.06));
  color: #E5383B;
}

@media (max-width: 768px) {
  .rating-bar { flex-direction: column; gap: 24px; }
  .rating-divider { display: none; }
  .slogan-section { padding: 48px 0; }
}

/* ============================================
   V2 新增组件 — 文档查重定位升级
   ============================================ */

/* ============ 价值主张卡片（四句口诀） ============ */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 32px 24px;
  text-align: center;
  transition: all .3s var(--ease);
  position: relative;
  overflow: hidden;
}

.value-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  opacity: 0;
  transition: opacity .3s;
}

.value-card:hover {
  border-color: var(--c-border-light);
  background: var(--c-surface-2);
  transform: translateY(-4px);
  box-shadow: var(--sh-lg);
}

.value-card:hover::before {
  opacity: 1;
}

.value-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(0,151,215,.15), rgba(0,217,163,.10));
  border: 1px solid rgba(0,151,215,.2);
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
}

.value-icon svg { width: 28px; height: 28px; }

.value-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
  letter-spacing: .02em;
}

.value-desc {
  font-size: 13px;
  color: var(--c-text-sub);
  line-height: 1.65;
}

/* ============ 产品截图展示 ============ */
.product-showcase {
  position: relative;
  margin: 0 auto;
  max-width: 1100px;
}

.product-mockup {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--sh-lg), 0 0 0 1px rgba(0,151,215,.1);
  background: var(--c-surface-2);
}

.product-mockup img {
  width: 100%;
  height: auto;
  display: block;
}

.product-mockup-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 24px 32px;
  background: linear-gradient(transparent, rgba(10,14,20,.9));
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.product-mockup-caption h3 {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.product-mockup-caption p {
  font-size: 13px;
  color: rgba(255,255,255,.7);
}

.mockup-tag-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.mockup-tag-list .tag {
  font-size: 11px;
}

/* 截图选择器 */
.screen-selector {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.screen-dot {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-text-sub);
  font-size: 13px;
  cursor: pointer;
  transition: all .3s;
}

.screen-dot:hover {
  border-color: var(--c-border-light);
  color: var(--c-text);
}

.screen-dot.active {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}

/* ============ 双栏截图+文字 ============ */
.screen-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}

.screen-feature:last-child {
  margin-bottom: 0;
}

.screen-feature.reverse .screen-feature-img {
  order: 2;
}

.screen-feature-img {
  position: relative;
}

.screen-feature-img .product-mockup {
  box-shadow: var(--sh-lg);
}

.screen-feature-text .section-eyebrow {
  margin-bottom: 12px;
}

.screen-feature-text h3 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.screen-feature-text h3 .gradient-text {
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.screen-feature-text > p {
  font-size: 15px;
  color: var(--c-text-sub);
  line-height: 1.8;
  margin-bottom: 24px;
}

.screen-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.screen-feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--c-text);
}

.screen-feature-list li svg {
  width: 18px;
  height: 18px;
  color: var(--c-primary);
  flex-shrink: 0;
}

/* ============ 场景卡片 ============ */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.scenario-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 32px 24px;
  transition: all .3s var(--ease);
  position: relative;
}

.scenario-card:hover {
  border-color: var(--c-border-light);
  background: var(--c-surface-2);
  transform: translateY(-4px);
  box-shadow: var(--sh-md);
}

.scenario-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(0,151,215,.15), rgba(0,217,163,.10));
  border: 1px solid rgba(0,151,215,.2);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
}

.scenario-icon svg { width: 24px; height: 24px; }

.scenario-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--c-text);
}

.scenario-card > p {
  font-size: 13px;
  color: var(--c-text-sub);
  line-height: 1.65;
  margin-bottom: 16px;
}

.scenario-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.scenario-tags .tag {
  font-size: 11px;
  padding: 2px 8px;
}

/* ============ Hero 区大LOGO ============ */
.hero-brand-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-brand-logo {
  width: 56px;
  height: 56px;
  opacity: .9;
}

.hero-brand-text {
  text-align: left;
}

.hero-brand-text .brand-cn {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1;
}

.hero-brand-text .brand-en {
  font-size: 14px;
  color: var(--c-text-sub);
  font-family: var(--font-mono);
  letter-spacing: .1em;
  margin-top: 4px;
}

/* ============ 联系信息卡片 ============ */
.contact-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.contact-item {
  text-align: center;
}

.contact-item .contact-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(0,151,215,.15), rgba(0,217,163,.10));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-primary);
}

.contact-item h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--c-text);
}

.contact-item p {
  font-size: 13px;
  color: var(--c-text-sub);
  font-family: var(--font-mono);
  line-height: 1.55;
}

.contact-item p.contact-address {
  font-family: var(--font-body);
  max-width: 220px;
  margin: 0 auto;
}

.contact-item a {
  color: var(--c-text-sub);
  text-decoration: none;
}

.contact-item a:hover {
  color: var(--c-primary);
}

.contact-qr-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 280px));
  justify-content: center;
  gap: 24px;
  margin-top: 28px;
}

.contact-qr-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 28px 24px;
  text-align: center;
}

.contact-qr-img {
  width: 148px;
  height: 148px;
  object-fit: contain;
  background: #fff;
  border-radius: 12px;
  padding: 10px;
  margin: 0 auto 14px;
  display: block;
}

.contact-qr-card h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--c-text);
}

.contact-qr-card p {
  font-size: 13px;
  color: var(--c-text-muted);
  margin: 0;
}

@media (max-width: 640px) {
  .contact-qr-row {
    grid-template-columns: 1fr;
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ============ 维度 3+3 网格（六维） ============ */
.dimensions-grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.dimensions-grid-6 .dimension-card {
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.dimensions-grid-6 .dimension-number {
  font-size: 36px;
  -webkit-text-stroke: 1.5px var(--c-primary);
  position: absolute;
  top: 16px;
  right: 20px;
  opacity: .15;
  font-weight: 700;
  font-family: var(--font-display);
}

/* 维度卡片丰富视觉 */
.dimension-card {
  position: relative;
  overflow: hidden;
}

.dimension-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--card-glow, rgba(0,151,215,.08)) 0%, transparent 70%);
  pointer-events: none;
  transition: all .5s var(--ease);
}

.dimension-card:hover::after {
  transform: scale(1.5);
  opacity: .5;
}

.dimension-card .dim-glow {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  opacity: .4;
  pointer-events: none;
}

.dimension-card .card-icon {
  margin-bottom: 16px;
}

.dimension-card .card-title {
  font-size: 18px;
  margin-bottom: 4px;
}

.dimension-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}

.dim-metric {
  text-align: center;
}

.dim-metric-value {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1;
  margin-bottom: 4px;
}

.dim-metric-label {
  font-size: 11px;
  color: var(--c-text-muted);
}

.dim-progress {
  margin-top: 16px;
  height: 4px;
  background: var(--c-surface-3);
  border-radius: 2px;
  overflow: hidden;
}

.dim-progress-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transition: width .8s var(--ease);
}

.dimension-card .dim-badge-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

/* ============ 响应式补充 ============ */
@media (max-width: 1024px) {
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .dimensions-grid-6 { grid-template-columns: repeat(2, 1fr); }
  .screen-feature { grid-template-columns: 1fr; gap: 32px; }
  .screen-feature.reverse .screen-feature-img { order: 0; }
  .contact-card { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

@media (max-width: 640px) {
  .value-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .dimensions-grid-6 { grid-template-columns: 1fr; }
  .contact-card { grid-template-columns: 1fr; }
  .hero-brand-row { flex-direction: column; text-align: center; }
  .hero-brand-text { text-align: center; }
  .product-mockup-caption { flex-direction: column; align-items: flex-start; }
}