/* ============================================================
   Font Faces - 本地字体（无需 Google Fonts CDN）
   ============================================================ */
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400; font-display: swap; src: url(fonts/Inter-400.ttf) format('truetype'); }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 500; font-display: swap; src: url(fonts/Inter-500.ttf) format('truetype'); }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 600; font-display: swap; src: url(fonts/Inter-600.ttf) format('truetype'); }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 700; font-display: swap; src: url(fonts/Inter-700.ttf) format('truetype'); }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 800; font-display: swap; src: url(fonts/Inter-800.ttf) format('truetype'); }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 500; font-display: swap; src: url(fonts/JetBrainsMono-500.ttf) format('truetype'); }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 700; font-display: swap; src: url(fonts/JetBrainsMono-700.ttf) format('truetype'); }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 800; font-display: swap; src: url(fonts/JetBrainsMono-800.ttf) format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 600; font-display: swap; src: url(fonts/PlusJakartaSans-600.ttf) format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 700; font-display: swap; src: url(fonts/PlusJakartaSans-700.ttf) format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 800; font-display: swap; src: url(fonts/PlusJakartaSans-800.ttf) format('truetype'); }

/* ============================================================
/* ============================================================
   Design System: Stripe 定制版 · 杭州真房东宽带
   ============================================================ */

/* ----- 色彩令牌 · 2026 Digital Indigo ----- */
:root {
  --color-primary: #4F46E5;
  --color-primary-dark: #3730A3;
  --color-primary-light: #EEF2FF;
  --color-accent: #6366F1;
  --color-accent-dark: #4338CA;
  --color-accent-light: #E0E7FF;
  --color-error: #EF4444;
  --color-success: #0EA5E9;
  --color-bg: #F8FAFC;
  --color-card: #FFFFFF;
  --color-text: #0F172A;
  --color-text-secondary: #64748B;
  --color-border: #E2E8F0;
  --color-price: #4F46E5;
  --color-price-recommend: #6366F1;
  --color-table-header: #EEF2FF;
  --color-table-recommend: #E0E7FF;

  /* ----- 排版令牌 ----- */
  --font-heading: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, 'PingFang SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* ----- 间距令牌 (4px 网格) ----- */
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* ----- 圆角令牌 ----- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ----- 阴影令牌 ----- */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08);
  --shadow-warm: 0 4px 14px rgba(99,102,241,0.15);
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  font-size: 16px;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  margin-bottom: var(--space-3);
}
.section-title-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}
.section-title-row .section-title {
  margin-bottom: 0;
}
/* Plan Navigator - 3 buttons */
.plan-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}
.plan-nav-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--color-card);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
}
.plan-nav-item .plan-nav-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.plan-nav-item .plan-nav-icon svg {
  width: 18px;
  height: 18px;
}
.plan-nav-item--bb .plan-nav-icon {
  background: linear-gradient(135deg, #EEF2FF, #E0E7FF);
}
.plan-nav-item--bb .plan-nav-icon svg { color: var(--color-primary); }
.plan-nav-item--sim .plan-nav-icon {
  background: linear-gradient(135deg, #ECFDF5, #D1FAE5);
}
.plan-nav-item--sim .plan-nav-icon svg { color: #059669; }
.plan-nav-item--vip .plan-nav-icon {
  background: linear-gradient(135deg, #FFF7ED, #FED7AA);
}
.plan-nav-item--vip .plan-nav-icon svg { color: #C2410C; }
.plan-nav-item--portin .plan-nav-icon {
  background: linear-gradient(135deg, #FDF2F8, #FBCFE8);
}
.plan-nav-item--portin .plan-nav-icon svg { color: #BE185D; }
.plan-nav-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.plan-nav-item--bb:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: linear-gradient(135deg, #EEF2FF, #F5F3FF);
}
.plan-nav-item--sim:hover {
  border-color: #059669;
  color: #047857;
  background: linear-gradient(135deg, #ECFDF5, #D1FAE5);
}
.plan-nav-item--vip:hover {
  border-color: #EA580C;
  color: #C2410C;
  background: linear-gradient(135deg, #FFF7ED, #FFEDD5);
}
.plan-nav-item--portin:hover {
  border-color: #DB2777;
  color: #BE185D;
  background: linear-gradient(135deg, #FDF2F8, #FCE7F3);
}
.plan-nav-item .plan-nav-arrow {
  opacity: 0;
  transform: translateX(-4px);
  transition: all 0.25s ease;
  color: inherit;
}
.plan-nav-item:hover .plan-nav-arrow {
  opacity: 1;
  transform: translateX(0);
}
.plan-nav-item .plan-nav-sub {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-secondary);
  display: block;
  margin-top: 1px;
}
.plan-nav-item:hover .plan-nav-sub {
  color: inherit;
  opacity: 0.7;
}
.section-subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 560px;
  margin: 0 auto var(--space-10);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 12px 24px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
}
.btn-accent {
  background: var(--color-accent);
  color: var(--color-text);
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary-light);
}
.btn-lg {
  padding: 16px 32px;
  font-size: 17px;
  border-radius: 12px;
}

/* ============================================================
   Tags & Badges
   ============================================================ */
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}
.tag-hot { background: var(--color-error); color: #fff; }
.tag-recommend { background: var(--color-success); color: #fff; }
.tag-accent { background: var(--color-accent); color: #fff; }

/* ============================================================
   1. Navigation
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}
.navbar-brand svg {
  flex-shrink: 0;
}
.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.navbar-actions .btn {
  padding: 8px 20px;
  font-size: 14px;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.2s ease;
}

/* ============================================================
   2. Hero
   ============================================================ */
.hero {
  padding: var(--space-20) 0 var(--space-16);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(79,70,229,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.hero-brand {
  font-family: var(--font-heading);
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.hero-slogan {
  font-size: 20px;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.5;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}
.hero-tag-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
.hero-tag-item .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.hero-tag-item .dot.dot-primary { background: var(--color-primary); }
.hero-tag-item .dot.dot-accent { background: var(--color-accent); }
.hero-tag-item .dot.dot-success { background: var(--color-success); }

/* ============================================================
   3. Plan Navigator（独立区域）
   ============================================================ */
.section-plans {
  padding: var(--space-16) 0 var(--space-8);
  scroll-margin-top: 80px;
}
.section-broadband {
  padding: var(--space-8) 0 var(--space-16);
  scroll-margin-top: 80px;
}
.broadband-table-wrap {
  max-width: 560px;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.broadband-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 15px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.broadband-table td {
  padding: 14px 16px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  vertical-align: middle;
}
.broadband-table th {
  background: var(--color-table-header);
  color: var(--color-text);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.03em;
  padding: 14px 16px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
}
.broadband-table th:first-child {
  border-right: none;
  border-left: 1px solid var(--color-border);
}
.broadband-table th:first-child,
.broadband-table td:first-child {
  border-right: none;
  border-left: 1px solid var(--color-border);
}
.broadband-table tr:last-child td {
  border-bottom: none;
}
.broadband-table tr:last-child td:first-child {
  border-bottom: none;
  border-left: 1px solid var(--color-border);
}
.broadband-table tr:last-child td:last-child {
  border-bottom: none;
}
.broadband-table .bb-label {
  color: var(--color-text-secondary);
  font-weight: 500;
  text-align: left;
  padding-left: 20px;
  width: 30%;
}
.broadband-table .bb-col {
  color: var(--color-primary);
  font-weight: 800;
  font-family: var(--font-mono);
  font-size: 24px;
}
.broadband-table .bb-col-recommend {
  color: var(--color-accent);
  font-weight: 800;
  font-family: var(--font-mono);
  font-size: 24px;
}
.broadband-table .bb-rec-header {
  position: relative;
}
.broadband-table .bb-rec-header::after {
  content: '更划算';
  position: absolute;
  top: 2px;
  right: 8px;
  background: var(--color-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
  z-index: 10;
}
.broadband-table .bb-save-row td {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-weight: 600;
  font-size: 13px;
}
.broadband-table .bb-per-year td {
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
}
.broadband-table .bb-per-year .bb-col,
.broadband-table .bb-per-year .bb-col-recommend {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}
.broadband-table .bb-highlight-row td {
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  padding: 12px 16px;
}
.broadband-table .bb-savings-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}
.broadband-table .bb-service-row td {
  color: var(--color-text-secondary);
  font-size: 13px;
  background: #F8FAFC;
}
.broadband-badge {
  display: flex;
  width: fit-content;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-heading);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99, 102, 241, 0.2);
  margin: 0 auto var(--space-6);
}
.broadband-note {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  background: #fff;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  line-height: 1.6;
}
.broadband-note svg {
  flex-shrink: 0;
  margin-top: 2px;
}

/* ============================================================
   纯宽带专区标题
   ============================================================ */
.bb-section-title {
  font-family: var(--font-heading);
  font-size: 44px;
  font-weight: 800;
  color: var(--color-primary);
  text-align: center;
  line-height: 1.15;
  margin-bottom: var(--space-4);
}
.bb-section-title .bb-title-accent {
  display: block;
  font-size: 52px;
  background: linear-gradient(135deg, #4F46E5, #6366F1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   3b. 移动老用户专属福利
   ============================================================ */
.section-vip {
  padding: var(--space-16) 0;
  background: linear-gradient(180deg, #EEF2FF 0%, var(--color-bg) 100%);
  scroll-margin-top: 80px;
}
.vip-header {
  text-align: center;
  margin-bottom: var(--space-10);
}
.vip-badge-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}
.vip-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #4F46E5, #6366F1);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  box-shadow: 0 2px 12px rgba(79,70,229,0.3);
}
.vip-badge svg {
  width: 14px;
  height: 14px;
}
.vip-base {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1.5px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: var(--radius-full);
}
.vip-base strong {
  color: var(--color-primary);
  font-weight: 700;
  font-family: var(--font-mono);
}
.vip-title {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-3);
}
.vip-subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto;
}
.vip-table-wrap {
  max-width: 560px;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.vip-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 15px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.vip-table th {
  background: var(--color-table-header);
  color: var(--color-text);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.03em;
  padding: 14px 16px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
}
.vip-table th:first-child {
  border-right: none;
  border-left: 1px solid var(--color-border);
}
.vip-table td {
  padding: 14px 16px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  vertical-align: middle;
}
.vip-table td:first-child {
  border-right: none;
  border-left: 1px solid var(--color-border);
}
.vip-table tr:last-child td {
  border-bottom: none;
}
.vip-table tr:last-child td:first-child {
  border-bottom: none;
  border-left: 1px solid var(--color-border);
}
.vip-table tr:last-child td:last-child {
  border-bottom: none;
}
.vip-table .vip-label {
  color: var(--color-text-secondary);
  font-weight: 500;
  text-align: left;
  padding-left: 20px;
  width: 30%;
}
.vip-table .vip-col {
  color: var(--color-primary);
  font-weight: 800;
  font-family: var(--font-mono);
  font-size: 22px;
}
.vip-table .vip-col-recommend {
  color: var(--color-accent);
  font-weight: 800;
  font-family: var(--font-mono);
  font-size: 22px;
}
.vip-table .vip-rec-header {
  position: relative;
}
.vip-table .vip-rec-header::after {
  content: '推荐';
  position: absolute;
  top: 2px;
  right: 8px;
  background: var(--color-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
  z-index: 10;
}
.vip-table .vip-install-row td {
  color: var(--color-text-secondary);
  font-size: 13px;
  background: #F8FAFC;
}
.vip-note {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-5);
  background: linear-gradient(135deg, #EEF2FF 0%, #F5F3FF 100%);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--radius-lg);
  font-size: 13px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.6;
}
.vip-note .vip-note-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.vip-note .vip-note-icon svg {
  stroke: #fff;
}
.vip-note strong {
  color: var(--color-primary);
  font-weight: 700;
}
.vip-note .vip-note-highlight {
  display: inline-flex;
  align-items: baseline;
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  font-weight: 700;
  padding: 0 6px;
  border-radius: 4px;
  font-size: 14px;
}

/* ============================================================
   4. Data SIM Comparison - 桌面端表格 / 移动端卡片
   ============================================================ */
.section-sim {
  padding: var(--space-16) 0;
  scroll-margin-top: 80px;
}
.sim-grid {
  display: flex;
  gap: var(--space-6);
  align-items: stretch;
}
.sim-card {
  flex: 1;
  min-width: 0;
  background: var(--color-card);
  border-radius: var(--radius-xl);
  border: 2px solid var(--color-border);
  overflow: hidden;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}
.sim-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
/* 套餐色系区分 */
.sim-card--a { border-color: #CBD5E1; }
.sim-card--a .sim-card-header { background: linear-gradient(180deg, #F1F5F9 0%, #FFFFFF 100%); }
.sim-card--a .sim-card-price { color: #475569; }

.sim-card--rec { border-color: var(--color-accent); box-shadow: var(--shadow-warm); }
.sim-card--rec:hover { box-shadow: 0 8px 30px rgba(99,102,241,0.2); }
.sim-card--rec .sim-card-header { background: linear-gradient(180deg, var(--color-table-recommend) 0%, var(--color-card) 100%); }
.sim-card--rec .sim-card-price { color: var(--color-price-recommend); }

.sim-card--c { border-color: #A7F3D0; }
.sim-card--c .sim-card-header { background: linear-gradient(180deg, #ECFDF5 0%, #FFFFFF 100%); }
.sim-card--c .sim-card-price { color: #059669; }

.sim-card-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 14px 5px 16px;
  border-radius: 0 0 0 var(--radius-lg);
  letter-spacing: 0.02em;
}
.sim-card-header {
  padding: var(--space-8) var(--space-8) var(--space-6);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
.sim-card-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.sim-card-price {
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
}
.sim-card-price .unit {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-secondary);
}
.sim-card-features {
  padding: var(--space-8);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.sim-card-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
}
.sim-card-row-label {
  font-size: 15px;
  color: var(--color-text-secondary);
  font-weight: 500;
  flex-shrink: 0;
}
.sim-card-row-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  text-align: right;
}
.sim-card-row-detail {
  font-size: 12px;
  color: var(--color-text-secondary);
  font-weight: 400;
  display: block;
  margin-top: 2px;
}
/* B套餐推荐条 */
.sim-card--rec .sim-card-features {
  background: linear-gradient(180deg, rgba(99,102,241,0.03) 0%, transparent 100%);
}

/* ============================================================
   携号转网专区
   ============================================================ */
.section-portin {
  padding: var(--space-16) 0;
  scroll-margin-top: 80px;
}
.portin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}
.portin-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}
.portin-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.portin-badge-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6) 0;
}
.portin-badge {
  background: var(--color-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
}
.portin-badge-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
}
.portin-body {
  padding: var(--space-4) var(--space-6);
  flex: 1;
}
.portin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.portin-table thead th {
  font-size: 12px;
  font-weight: 600;
  padding: 8px 12px;
  text-align: center;
  letter-spacing: 0.03em;
  border-bottom: 2px solid var(--color-border);
}
.portin-th-item {
  text-align: left !important;
  color: var(--color-text-secondary);
}
.portin-th-before {
  color: #94A3B8;
  background: #F1F5F9;
}
.portin-th-after {
  color: var(--color-primary);
  background: var(--color-accent-light);
}
.portin-table tbody td {
  padding: 10px 12px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.portin-table tbody tr:last-child td {
  border-bottom: none;
}
.portin-td-label {
  text-align: left !important;
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: 13px;
  white-space: nowrap;
}
.portin-td-before {
  color: #94A3B8;
  background: #F1F5F9;
}
.portin-td-after {
  color: var(--color-primary);
  background: var(--color-accent-light);
  font-weight: 600;
}
.portin-td-after strong {
  color: var(--color-primary);
}
.portin-save {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
  margin-top: auto;
}
.portin-save-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-success);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}
.portin-save-tag svg {
  width: 14px;
  height: 14px;
}
.portin-cta {
  padding: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.portin-cta-glass {
  position: relative;
  padding: var(--space-8) var(--space-10);
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 40%, #C7D2FE 100%);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.portin-cta-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(50px);
  opacity: 0.35;
  animation: portin-float 6s ease-in-out infinite;
  pointer-events: none;
}
.portin-cta-blob-1 {
  width: 200px;
  height: 200px;
  background: #6366F1;
  top: -50px;
  left: -40px;
  animation-delay: 0s;
}
.portin-cta-blob-2 {
  width: 180px;
  height: 180px;
  background: #A5B4FC;
  bottom: -50px;
  right: -30px;
  animation-delay: -3s;
}
@keyframes portin-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -15px) scale(1.05); }
  66% { transform: translate(-15px, 10px) scale(0.95); }
}
.portin-cta-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}
.portin-cta-left {
  flex: 1;
  min-width: 0;
}
.portin-cta-title {
  font-size: 22px;
  font-weight: 800;
  color: #312E81;
  margin-bottom: var(--space-4);
  line-height: 1.3;
}
.portin-cta-perks {
  position: relative;
  height: 36px;
  overflow: hidden;
}
.portin-cta-perk {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: #312E81;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  width: fit-content;
  position: absolute;
  left: 0;
  top: 0;
  animation: perkFade 5s ease-in-out infinite;
}
.portin-cta-perk:nth-child(2) {
  animation-delay: 2.5s;
}
@keyframes perkFade {
  0%, 40% { opacity: 1; transform: translateY(0); }
  50%, 90% { opacity: 0; transform: translateY(-6px); }
  100% { opacity: 1; transform: translateY(0); }
}
.portin-cta-right {
  flex-shrink: 0;
}
.portin-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #4338CA;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  padding: 16px 32px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(67, 56, 202, 0.3);
  transition: all 0.25s ease;
  white-space: nowrap;
}
.portin-cta-btn:hover {
  background: #3730A3;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(67, 56, 202, 0.4);
}
.portin-cta-btn:active {
  transform: translateY(0);
}

@media (max-width: 767px) {
  .section-portin {
    padding: var(--space-8) 0;
  }
  .portin-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
  }
  .portin-badge-row {
    padding: var(--space-3) var(--space-4) 0;
    flex-wrap: wrap;
  }
  .portin-badge-desc {
    font-size: 12px;
    width: 100%;
    margin-top: 2px;
  }
  .portin-body {
    padding: var(--space-3) 0;
  }
  .portin-table {
    font-size: 12px;
  }
  .portin-table thead th {
    padding: 6px 8px;
    font-size: 11px;
  }
  .portin-table tbody td {
    padding: 8px;
  }
  .portin-td-label {
    font-size: 12px;
  }
  .portin-save {
    padding: var(--space-3) var(--space-4);
    justify-content: center;
    gap: 6px;
  }
  .portin-save-tag {
    font-size: 12px;
    padding: 3px 10px;
  }
  .portin-cta-glass {
    padding: var(--space-6) var(--space-4);
  }
  .portin-cta-content {
    flex-direction: column;
    gap: var(--space-8);
    text-align: center;
  }
  .portin-cta-left {
    width: 100%;
  }
  .portin-cta-title {
    font-size: 18px;
    text-align: center;
    margin-bottom: var(--space-3);
  }
  .portin-cta-perks {
    align-items: center;
    justify-content: center;
  }
  .portin-cta-perk {
    font-size: 13px;
    padding: 8px 18px;
  }
  .portin-cta-right {
    width: 100%;
  }
  .portin-cta-btn {
    width: 100%;
    justify-content: center;
    font-size: 15px;
    padding: 13px 24px;
  }
  .portin-cta-blob {
    width: 150px;
    height: 150px;
  }
  .portin-cta-blob-1 {
    top: -20px;
    left: -20px;
  }
  .portin-cta-blob-2 {
    bottom: -20px;
    right: -20px;
  }
}

/* ============================================================
   5. Service Commitment — 网格卡片（素雅灰调）
   ============================================================ */
.section-service {
  padding: var(--space-16) 0;
  background: var(--color-bg);
}
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}
.service-slide-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
}
.service-slide-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.service-slide-icon {
  width: 36px;
  height: 36px;
  margin-bottom: var(--space-4);
  color: #94A3B8;
}
.service-slide-icon svg {
  width: 100%;
  height: 100%;
}
.service-slide-body {
  padding: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.service-slide-title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: #334155;
  margin-bottom: var(--space-2);
  line-height: 1.3;
}
.service-slide-desc {
  font-size: 13px;
  color: #94A3B8;
  line-height: 1.7;
  flex: 1;
}
.service-slide-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: var(--space-5);
  padding: 4px 0;
  border-radius: 0;
  font-size: 12px;
  font-weight: 500;
  width: fit-content;
  color: #64748B;
  border-bottom: 1px solid #E2E8F0;
}

/* ============================================================
   6. FAQ
   ============================================================ */
.section-faq {
  padding: var(--space-16) 0;
}
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 0;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  transition: color 0.2s ease;
}
.faq-question:hover {
  color: var(--color-primary);
}
.faq-question svg {
  flex-shrink: 0;
  transition: transform 0.25s ease;
  color: var(--color-text-secondary);
}
.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 0 20px;
}
.faq-answer p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   7. Bottom CTA + Footer
   ============================================================ */
.section-cta {
  padding: var(--space-16) 0;
  background: var(--color-primary);
  color: #fff;
  text-align: center;
}
.section-cta h2 {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.section-cta p {
  font-size: 16px;
  opacity: 0.85;
  margin-bottom: var(--space-8);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.section-cta .btn {
  background: #fff;
  color: var(--color-primary);
}
.section-cta .btn:hover {
  background: #EEF2FF;
  box-shadow: 0 0 0 3px rgba(255,255,255,0.2);
}

.footer {
  padding: var(--space-6) 0;
  background: var(--color-text);
  color: rgba(255,255,255,0.5);
  font-size: 13px;
  text-align: center;
}

/* ============================================================
   Mobile Responsive
   ============================================================ */
@media (max-width: 767px) {
  .container {
    padding: 0 var(--space-4);
  }

  .section-title {
    font-size: 28px;
  }
  .section-title-row {
    flex-direction: column;
    gap: var(--space-3);
  }
  .plan-nav {
    flex-direction: column;
    gap: var(--space-3);
    padding: 0 var(--space-2);
  }
  .plan-nav-item {
    padding: 14px 18px;
  }
  .section-subtitle {
    font-size: 15px;
    margin-bottom: var(--space-8);
  }

  /* Nav */
  .navbar-brand span {
    font-size: 17px;
  }
  .hamburger {
    display: flex;
  }
  .navbar-actions .btn-outline {
    display: none;
  }
  .navbar-actions.mobile-open {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-4);
    box-shadow: var(--shadow-md);
    z-index: 99;
  }
  .navbar-actions.mobile-open .btn {
    display: flex;
    width: 100%;
    justify-content: center;
  }
  .navbar-actions.mobile-open .btn-outline {
    display: flex;
  }

  /* Hero */
  .hero-brand {
    font-size: 36px;
  }
  .hero-slogan {
    font-size: 16px;
    margin-bottom: var(--space-6);
  }
  .hero-tags {
    gap: var(--space-2);
  }
  .hero-tag-item {
    font-size: 13px;
    padding: 4px 12px;
  }

  /* Broadband */
  .bb-section-title {
    font-size: 32px;
  }
  .bb-section-title .bb-title-accent {
    font-size: 38px;
  }
  .broadband-table-wrap {
    margin-left: var(--space-4);
    margin-right: var(--space-4);
  }
  .broadband-table th {
    font-size: 13px;
    padding: 10px 8px;
  }
  .broadband-table td {
    padding: 10px 8px;
    font-size: 13px;
  }
  .broadband-table .bb-label {
    padding-left: 10px;
    font-size: 12px;
  }
  .broadband-table .bb-col,
  .broadband-table .bb-col-recommend {
    font-size: 18px;
  }
  .broadband-table .bb-savings-tag {
    font-size: 10px;
    padding: 2px 6px;
  }
  .broadband-note {
    flex-direction: column;
    text-align: center;
    padding: var(--space-4);
    margin-left: var(--space-4);
    margin-right: var(--space-4);
  }

  /* VIP */
  .vip-title {
    font-size: 28px;
  }
  .vip-table-wrap {
    margin-left: var(--space-4);
    margin-right: var(--space-4);
  }
  .vip-table th {
    font-size: 11px;
    padding: 10px 10px;
  }
  .vip-table td {
    padding: 10px 10px;
    font-size: 14px;
  }
  .vip-table .vip-col,
  .vip-table .vip-col-recommend {
    font-size: 15px;
  }
  .vip-table .vip-label {
    padding-left: 12px;
    font-size: 13px;
  }
  .vip-note {
    flex-direction: column;
    text-align: center;
    padding: var(--space-4);
    margin-left: var(--space-4);
    margin-right: var(--space-4);
  }
  .vip-note .vip-note-icon {
    width: 24px;
    height: 24px;
  }

  /* Service — 网格卡片 */
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
  .service-slide-card {
    padding: var(--space-4);
  }
  .service-slide-icon {
    width: 28px;
    height: 28px;
  }
  .service-slide-title {
    font-size: 15px;
  }
  .service-slide-desc {
    font-size: 12px;
  }

  /* CTA */
  .section-cta h2 {
    font-size: 28px;
  }
  .section-cta .btn-lg {
    width: 100%;
  }

  /* Section spacing */
  .section-plans,
  .section-broadband,
  .section-vip,
  .section-sim,
  .section-portin,
  .section-service,
  .section-faq,
  .section-cta {
    padding: var(--space-8) 0;
  }
  /* SIM — 并排卡片 */
  .sim-grid {
    flex-direction: column;
    gap: var(--space-4);
  }
  .sim-card {
    min-width: 0;
  }
  .sim-card-price {
    font-size: 36px;
  }
  .sim-card-name {
    font-size: 18px;
  }
  .sim-card-row-label {
    font-size: 14px;
  }
  .sim-card-row-value {
    font-size: 15px;
  }
  .hero {
    padding: var(--space-10) 0 var(--space-8);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
  .sim-card-name {
    font-size: 18px;
  }
  .sim-card-price {
    font-size: 38px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus visible */
.btn:focus-visible,
.faq-question:focus-visible,
.navbar a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Extra small screens */
@media (max-width: 420px) {
  .service-slide-card {
    padding: var(--space-3);
  }
  .service-slide-icon {
    width: 24px;
    height: 24px;
  }
  .service-slide-title {
    font-size: 14px;
  }
  .service-slide-desc {
    font-size: 11px;
  }
  .service-slide-tag {
    font-size: 11px;
  }

  .sim-card-price {
    font-size: 32px;
  }
  .sim-card-name {
    font-size: 17px;
  }
  .sim-card-row-label {
    font-size: 13px;
  }
  .sim-card-row-value {
    font-size: 14px;
  }
}

/* ============================================================
   Modal / 微信弹窗
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  backdrop-filter: blur(4px);
}
.modal-overlay.active {
  display: flex;
}
.modal-box {
  background: var(--color-card);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 360px;
  width: 100%;
  text-align: center;
  box-shadow: 0 25px 50px rgba(0,0,0,0.15);
  position: relative;
  animation: modalIn 0.25s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.92) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.2s ease;
  line-height: 1;
}
.modal-close:hover {
  color: var(--color-text);
}
.modal-box h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}
.modal-box .modal-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}
.modal-qr-area {
  width: 200px;
  height: 200px;
  margin: 0 auto var(--space-4);
  background: var(--color-card);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.modal-qr-area img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.modal-qr-placeholder {
  text-align: center;
  padding: var(--space-4);
}
.modal-qr-placeholder .qr-icon {
  font-size: 48px;
  margin-bottom: var(--space-2);
}
.modal-qr-placeholder .qr-label {
  font-size: 12px;
  color: var(--color-text-secondary);
}
.modal-hint {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}
.modal-wechat-id {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  margin-bottom: var(--space-4);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-text);
}
.modal-wechat-id .wx-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-secondary);
}
.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-copy:hover {
  background: var(--color-primary-dark);
}
.btn-copy.copied {
  background: var(--color-success);
}
.modal-box .btn-copy svg {
  width: 16px;
  height: 16px;
}