/* ============================================
   普华德科技 — AP Brand Redesign V2.0
   基于名片视觉识别系统
   主色: Deep Blue #0047AB + 灰白辅助
   ============================================ */

:root {
  --brand: #0047AB;
  --brand-dark: #003380;
  --brand-light: #E8F0FE;
  --brand-glow: rgba(0, 71, 171, 0.1);

  --bg-dark: #0A1628;
  --bg-mid: #0F1F38;
  --bg-section: #F5F7FA;
  --bg-white: #FFFFFF;

  --accent: #FF6B35;
  --accent-dark: #E0552A;

  --text-primary: #1A1E2E;
  --text-secondary: #5A6377;
  --text-light: #8E95A8;
  --text-white: #FFFFFF;
  --text-white-dim: rgba(255,255,255,0.7);

  --border: #E5E7EC;
  --border-dark: rgba(255,255,255,0.08);
  --shadow-sm: 0 1px 3px rgba(10,22,40,0.06);
  --shadow-md: 0 4px 16px rgba(10,22,40,0.08);
  --shadow-lg: 0 12px 40px rgba(10,22,40,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== HEADER ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  height: 72px;
}
.header-inner {
  display: flex; align-items: center; height: 72px;
}

/* Logo - 仿名片AP组合标 */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
}
.logo-mark {
  width: 40px; height: 40px;
  flex-shrink: 0;
}
.logo-text-group {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-name-cn {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: 1px;
}
.logo-name-en {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.25s;
}
.nav-link:hover, .nav-link.active {
  color: var(--brand);
  background: var(--brand-light);
}

.nav-dropdown { position: relative; }
.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-white);
  min-width: 520px;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  z-index: 100;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.nav-dropdown:hover .dropdown-menu { display: grid; }
.dropdown-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--brand);
  margin-bottom: 8px;
}
.dropdown-menu a {
  display: block;
  padding: 5px 0;
  color: var(--text-secondary);
  font-size: 0.83rem;
  transition: color 0.2s;
}
.dropdown-menu a:hover { color: var(--brand); }

.menu-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  padding: 8px; flex-direction: column; gap: 5px;
}
.menu-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: all 0.3s;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-mid));
  overflow: hidden;
  padding-top: 72px;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-glow {
  position: absolute; top: 15%; right: -5%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,71,171,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative; z-index: 1;
  text-align: center; padding: 60px 0;
}
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0,71,171,0.12);
  border: 1px solid rgba(0,71,171,0.2);
  border-radius: 100px;
  font-size: 0.78rem; font-weight: 500;
  color: var(--brand-light);
  margin-bottom: 24px;
}
.hero-content h1 {
  font-size: 3.2rem; font-weight: 800;
  color: var(--text-white);
  line-height: 1.15;
  margin-bottom: 16px;
}
.hero-content .hero-sub {
  font-size: 1.1rem;
  color: var(--text-white-dim);
  max-width: 640px;
  margin: 0 auto 32px;
}
.hero-actions {
  display: flex; gap: 16px;
  justify-content: center; flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px;
  font-weight: 600; font-size: 0.95rem;
  transition: all 0.3s; cursor: pointer;
  border: none; font-family: var(--font-cn);
}
.btn-primary {
  background: var(--brand);
  color: var(--text-white);
}
.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,71,171,0.25);
}
.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 1.5px solid rgba(255,255,255,0.25);
}
.btn-outline:hover {
  border-color: var(--text-white);
  transform: translateY(-2px);
}

/* Stats */
.hero-stats {
  display: flex; justify-content: center;
  gap: 48px; flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 2.2rem; font-weight: 800;
  color: var(--text-white);
}
.hero-stat-suffix {
  font-size: 1.2rem; font-weight: 600;
  color: var(--brand-light); margin-left: 2px;
}
.hero-stat-label {
  display: block; font-size: 0.78rem;
  color: var(--text-white-dim); margin-top: 4px;
}

/* ===== TRUST BAR ===== */
.trust-bar {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}
.trust-bar-inner {
  display: flex; align-items: center; gap: 28px;
}
.trust-label {
  font-size: 0.72rem; font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 1px; white-space: nowrap;
}
.trust-logos {
  display: flex; gap: 24px;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.trust-logo {
  font-size: 0.85rem; font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap; opacity: 0.65;
  transition: opacity 0.3s;
}
.trust-logo:hover { opacity: 1; }

/* ===== SECTIONS ===== */
.section { padding: 80px 0; }
.section-dark { background: var(--bg-dark); }
.section-header {
  text-align: center; margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--brand-light);
  border-radius: 100px;
  font-size: 0.72rem; font-weight: 600;
  color: var(--brand);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-tag-light { background: rgba(0,71,171,0.15); color: var(--brand-light); }
.section-title {
  font-size: 2rem; font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.section-title-light { color: var(--text-white); }
.section-desc {
  font-size: 0.95rem; color: var(--text-secondary);
  max-width: 600px; margin: 0 auto;
}
.section-desc-light { color: var(--text-white-dim); }

/* ===== BIZ CARDS ===== */
.biz-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.biz-card {
  position: relative;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.4s;
  overflow: hidden;
}
.biz-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: var(--brand);
}
.biz-card-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center;
  margin-bottom: 16px;
  color: var(--brand);
}
.biz-card-title {
  font-size: 1.25rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 12px;
}
.biz-card-desc {
  font-size: 0.88rem; color: var(--text-secondary);
  line-height: 1.7; margin-bottom: 16px;
}
.biz-card-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-bottom: 16px;
}
.biz-card-tags span {
  padding: 3px 10px;
  background: var(--brand-light);
  border-radius: 100px;
  font-size: 0.75rem; font-weight: 500;
  color: var(--brand);
}
.biz-card-link {
  font-size: 0.88rem; font-weight: 600;
  color: var(--brand);
  display: inline-flex; align-items: center; gap: 4px;
  transition: gap 0.3s;
}
.biz-card-link:hover { gap: 8px; }

/* ===== CHIP PRODUCT GRID (for subpages) ===== */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.prod-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: all 0.3s;
}
.prod-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-sm);
}
.prod-card h4 {
  font-size: 0.95rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 4px;
}
.prod-card .prod-brand {
  font-size: 0.72rem; font-weight: 500;
  color: var(--brand); margin-bottom: 4px;
}
.prod-card .prod-model {
  font-size: 0.8rem; font-family: var(--font-sans);
  color: var(--text-light); margin-bottom: 6px;
}
.prod-card p {
  font-size: 0.8rem; color: var(--text-secondary);
}

/* ===== PRODUCT TABLE ===== */
.content-table {
  width: 100%; border-collapse: collapse;
  margin: 24px 0; font-size: 0.83rem;
}
.content-table th {
  background: var(--brand);
  color: var(--text-white);
  padding: 10px 14px; text-align: left;
  font-weight: 600;
}
.content-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
}
.content-table tr:hover td { background: #f8f9fc; }

/* ===== CHIP GRID (dark bg) ===== */
.chip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.chip-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all 0.3s;
}
.chip-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-3px);
}
.chip-card h4 {
  font-size: 1rem; font-weight: 600;
  color: var(--text-white); margin-bottom: 6px;
}
.chip-card p {
  font-size: 0.8rem; color: var(--text-white-dim);
}

/* ===== EQUIP GRID ===== */
.equip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.equip-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all 0.3s;
  position: relative;
}
.equip-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--brand);
}
.equip-num {
  font-size: 2.6rem; font-weight: 800;
  color: rgba(0,71,171,0.05);
  position: absolute; top: 12px; right: 20px;
}
.equip-card h4 {
  font-size: 1rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 6px;
}
.equip-card p {
  font-size: 0.8rem; color: var(--text-secondary);
}

/* ===== INDUSTRY GRID ===== */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.industry-item {
  display: flex; align-items: center; gap: 10px;
  padding: 18px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  color: var(--text-white);
  font-weight: 500; font-size: 0.88rem;
  transition: all 0.3s;
}
.industry-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(0,71,171,0.3);
}
.industry-item svg { flex-shrink: 0; }

/* ===== BRANDS GRID ===== */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.brand-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
}
.brand-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--brand);
}
.brand-card h4 {
  font-size: 1.05rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 4px;
}
.brand-en {
  font-size: 0.75rem; color: var(--text-light);
  margin-bottom: 10px;
}
.brand-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--brand-light);
  border-radius: 100px;
  font-size: 0.7rem; font-weight: 500;
  color: var(--brand);
}

/* ===== CTA ===== */
.cta-section { padding: 64px 0; background: var(--bg-section); }
.cta-box {
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-mid));
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  position: relative; overflow: hidden;
}
.cta-box h2 {
  font-size: 1.8rem; font-weight: 700;
  color: var(--text-white);
  margin-bottom: 14px;
}
.cta-box p {
  font-size: 0.95rem; color: var(--text-white-dim);
  max-width: 520px; margin: 0 auto 32px;
}
.cta-buttons {
  display: flex; gap: 14px;
  justify-content: center; flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-dark);
  padding: 52px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 32px;
}
.footer-brand h4 {
  font-size: 1rem; font-weight: 700;
  color: var(--text-white); margin-bottom: 8px;
}
.footer-brand p {
  font-size: 0.82rem; color: var(--text-white-dim);
  line-height: 1.6;
}
.footer-links h5, .footer-contact h5 {
  font-size: 0.78rem; font-weight: 600;
  color: var(--text-white);
  margin-bottom: 14px;
  text-transform: uppercase; letter-spacing: 1px;
}
.footer-links a {
  display: block; font-size: 0.82rem;
  color: var(--text-white-dim);
  padding: 3px 0;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--brand-light); }
.footer-contact p {
  font-size: 0.82rem;
  color: var(--text-white-dim);
  padding: 3px 0;
}
.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom p { font-size: 0.78rem; color: var(--text-white-dim); }
.footer-bottom a { color: var(--text-white-dim); text-decoration: underline; text-underline-offset: 3px; }

/* ===== SUBPAGE STYLES ===== */
.page-hero {
  padding: 130px 0 48px;
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-mid));
  text-align: center;
}
.page-hero h1 {
  font-size: 2.2rem; font-weight: 700;
  color: var(--text-white); margin-bottom: 6px;
}
.page-hero p { color: var(--text-white-dim); max-width: 600px; margin: 0 auto; }
.page-content { padding: 48px 0; }
.page-content h2 {
  font-size: 1.4rem; font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 10px;
}
.page-content h3 {
  font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary);
  margin: 20px 0 6px;
}
.page-content p {
  font-size: 0.9rem; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 14px;
}
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.85rem; font-weight: 500;
  color: var(--text-white-dim);
  margin-bottom: 16px;
  transition: color 0.2s;
}
.back-link:hover { color: var(--text-white); }

/* ===== SCENARIO CARDS (white bg) ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.scenario-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: all 0.3s;
}
.scenario-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-sm);
}
.scenario-card h4 {
  font-size: 0.95rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 4px;
}
.scenario-card p {
  font-size: 0.82rem; color: var(--text-secondary);
  margin-bottom: 0;
}

.adv-list {
  color: var(--text-secondary);
  line-height: 2.2;
  margin-left: 20px;
  font-size: 0.88rem;
}

/* ===== RESPONSIVE - 移动端全面适配 ===== */

/* 平板及以下 1024px */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .chip-grid, .equip-grid { grid-template-columns: repeat(2, 1fr); }
  .brands-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid, .scenario-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-content h1 { font-size: 2.6rem; }
  .page-hero h1 { font-size: 1.8rem; }
  .page-content h2 { font-size: 1.25rem; }
}

/* 手机端 768px */
@media (max-width: 768px) {
  /* 容器 */
  .container { padding: 0 16px; }
  
  /* 导航栏 - 移动端全屏菜单 */
  .nav {
    display: none;
    position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 12px 16px; gap: 2px;
    overflow-y: auto;
    z-index: 999;
  }
  .nav.open { display: flex; }
  .nav-link { 
    width: 100%; padding: 12px 16px; 
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
  }
  .nav-dropdown .nav-link::after {
    content: "▾";
    margin-left: auto;
    font-size: 0.7rem;
    opacity: 0.5;
  }
  .dropdown-menu {
    position: static; min-width: auto; transform: none;
    background: var(--bg-section); padding: 10px 16px;
    border-radius: var(--radius-sm);
    grid-template-columns: 1fr; gap: 4px;
    margin-top: 2px;
    box-shadow: none;
  }
  .nav-dropdown:hover .dropdown-menu { display: none; }
  .nav-dropdown.active .dropdown-menu { display: grid; }
  .nav-dropdown.active .nav-link::after { content: "▴"; }
  .dropdown-label { font-size: 0.65rem; margin-top: 4px; }
  .dropdown-menu a { padding: 8px 0; font-size: 0.85rem; }
  .menu-toggle { display: flex; }

  /* Logo */
  .logo-mark { width: 32px; height: 32px; }
  .logo-name-cn { font-size: 0.9rem; }
  .logo-name-en { font-size: 0.55rem; }
  .logo { gap: 8px; }

  /* Hero */
  .hero { min-height: auto; padding: 100px 0 40px; }
  .hero-content { padding: 40px 0; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-content .hero-sub { font-size: 0.88rem; }
  .hero-badge { font-size: 0.68rem; padding: 4px 12px; }
  .hero-actions { gap: 10px; margin-bottom: 32px; }
  .hero-actions .btn { width: 100%; justify-content: center; padding: 12px 24px; font-size: 0.88rem; }
  .hero-stats { gap: 16px; }
  .hero-stat-num { font-size: 1.4rem; }
  .hero-stat-label { font-size: 0.68rem; }
  .hide-mobile { display: none; }

  /* 信任条 */
  .trust-bar { padding: 14px 0; }
  .trust-bar-inner { gap: 12px; flex-wrap: nowrap; }
  .trust-label { font-size: 0.62rem; flex-shrink: 0; }
  .trust-logos { gap: 14px; padding-bottom: 4px; }
  .trust-logo { font-size: 0.75rem; }

  /* Section */
  .section { padding: 36px 0; }
  .section-header { margin-bottom: 28px; }
  .section-title { font-size: 1.2rem; }
  .section-desc { font-size: 0.82rem; }

  /* 业务卡片 */
  .biz-grid { grid-template-columns: 1fr; gap: 16px; }
  .biz-card { padding: 28px 20px; }
  .biz-card-title { font-size: 1.1rem; }
  .biz-card-desc { font-size: 0.82rem; }
  .biz-card-tags span { font-size: 0.68rem; }

  /* 芯片/设备/行业网格 */
  .chip-grid, .equip-grid { grid-template-columns: 1fr; gap: 12px; }
  .chip-card { padding: 20px 18px; }
  .equip-card { padding: 20px 18px; }

  /* 品牌网格 */
  .brands-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .brand-card { padding: 18px 12px; }
  .brand-card h4 { font-size: 0.9rem; }
  .brand-en { font-size: 0.65rem; }

  /* 行业网格 */
  .industry-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .industry-item { padding: 12px; font-size: 0.78rem; }
  .industry-item svg { width: 16px; height: 16px; }

  /* CTA */
  .cta-section { padding: 36px 0; }
  .cta-box { padding: 28px 20px; border-radius: var(--radius-md); }
  .cta-box h2 { font-size: 1.15rem; }
  .cta-box p { font-size: 0.82rem; }
  .cta-buttons { flex-direction: column; gap: 10px; }
  .cta-buttons .btn { width: 100%; justify-content: center; padding: 12px 20px; }

  /* 页脚 */
  .footer { padding: 36px 0 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-brand h4 { font-size: 0.9rem; }
  .footer-links a, .footer-contact p { font-size: 0.78rem; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 6px; }

  /* 子页面 */
  .page-hero { padding: 100px 0 28px; }
  .page-hero h1 { font-size: 1.35rem; }
  .page-hero p { font-size: 0.82rem; }
  .page-content { padding: 28px 0; }
  .page-content h2 { font-size: 1.1rem; margin-top: 20px; }
  .page-content h3 { font-size: 0.95rem; }
  .page-content p { font-size: 0.82rem; }
  .back-link { font-size: 0.78rem; }

  /* 表格 - 手机端改为横向滚动 */
  .content-table { font-size: 0.72rem; display: block; overflow-x: auto; white-space: nowrap; }
  .content-table th, .content-table td { padding: 6px 8px; }

  /* 场景卡片 */
  .scenario-grid { grid-template-columns: 1fr; gap: 10px; }
  .scenario-card { padding: 14px; }
  .scenario-card h4 { font-size: 0.85rem; }
  .scenario-card p { font-size: 0.78rem; }

  /* 列表 */
  .adv-list { font-size: 0.82rem; }
  
  /* 按钮 */
  .btn { padding: 10px 20px; font-size: 0.85rem; }

  /* 隐藏桌面显示的元素 */
  .hide-mobile { display: none; }
}

/* 小屏手机 400px */
@media (max-width: 400px) {
  .container { padding: 0 12px; }
  .hero-content h1 { font-size: 1.35rem; }
  .section-title { font-size: 1.05rem; }
  .brands-grid { grid-template-columns: 1fr; gap: 10px; }
  .industry-grid { grid-template-columns: 1fr; gap: 8px; }
  .logo-name-en { display: none; }
  .page-hero h1 { font-size: 1.2rem; }
  .page-hero { padding: 90px 0 20px; }
}