/* ============================================
   武汉知夏智慧智能科技 - 全局样式
   Modern Premium Design System
   ============================================ */

/* CSS 变量 - 设计令牌 */
:root {
  /* 主色 - 深邃青蓝 */
  --color-primary: #0e7490;
  --color-primary-600: #0891b2;
  --color-primary-500: #06b6d4;
  --color-primary-400: #22d3ee;
  --color-primary-300: #67e8f9;
  --color-primary-100: #cffafe;
  --color-primary-50: #ecfeff;
  --color-ink: #0c1f33;
  --color-ink-soft: #1e293b;

  /* 强调色 - 温暖琥珀 */
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;
  --color-accent-light: #fbbf24;

  /* 微信绿 */
  --color-wechat: #07c160;
  --color-wechat-dark: #06ad56;

  /* 中性色 */
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-soft: #f0fdfa;
  --color-bg-dark: #0c1f33;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06), 0 2px 6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.08), 0 8px 16px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 32px 64px rgba(15, 23, 42, 0.12), 0 12px 24px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 0 40px rgba(6, 182, 212, 0.18);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --transition: 0.35s cubic-bezier(.4, 0, .2, 1);
  --transition-fast: 0.2s ease;

  --max-width: 1280px;
  --header-height: 76px;
}

/* 重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }
*::selection { background: var(--color-primary-100); color: var(--color-primary); }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 20px); }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* 通用容器 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   顶部导航栏 - 玻璃拟态
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  z-index: 1000;
  transition: all var(--transition);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 30px rgba(15, 23, 42, 0.06);
}
.nav-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink);
}
.brand-logo {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 50%, var(--color-primary-400) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(14, 116, 144, 0.25);
  position: relative;
  overflow: hidden;
}
.brand-logo::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.2) 50%, transparent 100%);
  animation: brandShine 3s ease-in-out infinite;
}
@keyframes brandShine {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}
.brand-text { line-height: 1.2; }
.brand-text strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.2px;
}
.brand-text small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 1.5px;
  margin-top: 2px;
}

.nav-menu { display: flex; gap: 4px; align-items: center; }
.nav-menu a {
  padding: 9px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 10px;
  transition: all var(--transition-fast);
  position: relative;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
  background: var(--color-primary-50);
}
.nav-cta {
  background: rgba(6, 182, 212, 0.12);
  color: var(--color-primary-600) !important;
  border: 1px solid rgba(6, 182, 212, 0.35);
  padding: 10px 20px !important;
  border-radius: 10px !important;
  font-weight: 600;
  margin-left: 8px;
}
.nav-cta:hover {
  background: rgba(6, 182, 212, 0.20);
  border-color: rgba(6, 182, 212, 0.5);
  transform: translateY(-1px);
  color: var(--color-primary-600) !important;
  box-shadow: 0 3px 10px rgba(14, 116, 144, 0.12);
}
.nav-admin {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--color-ink) !important;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.7);
  padding: 10px 16px !important;
  border-radius: 10px !important;
  font-weight: 600;
  font-size: 14px;
  margin-left: 8px;
}
.nav-admin::before {
  content: "🔐";
  font-size: 13px;
}
.nav-admin:hover {
  background: rgba(6, 182, 212, 0.10);
  border-color: rgba(6, 182, 212, 0.45);
  color: var(--color-primary-600) !important;
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--color-bg-alt);
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================
   主内容区
   ============================================ */
main { padding-top: var(--header-height); }

/* ============================================
   通用 Section
   ============================================ */
section { padding: 100px 0; position: relative; }
.section-alt { background: var(--color-bg-alt); position: relative; }
.section-dark { background: var(--color-bg-dark); color: #fff; position: relative; overflow: hidden; }
.section-gradient {
  background: linear-gradient(135deg, #f0fdfa 0%, #ecfeff 50%, #f0f9ff 100%);
}

.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  background: var(--color-primary-50);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  border-radius: 100px;
  margin-bottom: 20px;
  border: 1px solid rgba(6, 182, 212, 0.15);
}
.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-primary-500);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}
.section-dark .section-tag {
  background: rgba(6, 182, 212, 0.15);
  color: var(--color-primary-300);
  border-color: rgba(6, 182, 212, 0.2);
}
.section-title {
  font-size: 42px;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 16px;
  letter-spacing: -1px;
  line-height: 1.2;
}
.section-dark .section-title { color: #fff; }
.section-subtitle {
  font-size: 17px;
  color: var(--color-text-muted);
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.7;
}
.section-dark .section-subtitle { color: rgba(255, 255, 255, 0.7); }

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 12px;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
  line-height: 1.2;
}
.btn-primary {
  background: rgba(6, 182, 212, 0.10);
  color: var(--color-primary-600);
  border: 1px solid rgba(6, 182, 212, 0.35);
  box-shadow: 0 1px 3px rgba(14, 116, 144, 0.04);
}
.btn-primary:hover {
  background: rgba(6, 182, 212, 0.18);
  border-color: rgba(6, 182, 212, 0.55);
  color: #155e75;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(14, 116, 144, 0.12);
}
.btn-accent {
  background: rgba(245, 158, 11, 0.10);
  color: #b45309;
  border: 1px solid rgba(245, 158, 11, 0.35);
  box-shadow: 0 1px 3px rgba(245, 158, 11, 0.04);
}
.btn-accent:hover {
  background: rgba(245, 158, 11, 0.20);
  border-color: rgba(245, 158, 11, 0.55);
  color: #92400e;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.12);
}
.btn-wechat {
  background: rgba(7, 193, 96, 0.10);
  color: #047857;
  border: 1px solid rgba(7, 193, 96, 0.32);
  box-shadow: 0 1px 3px rgba(7, 193, 96, 0.04);
}
.btn-wechat:hover {
  background: rgba(7, 193, 96, 0.20);
  border-color: rgba(7, 193, 96, 0.55);
  color: #065f46;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(7, 193, 96, 0.12);
}
.btn-outline {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  color: var(--color-ink);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  background: var(--color-ink);
  color: #fff;
  border-color: var(--color-ink);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
}
.btn-ghost:hover {
  background: var(--color-primary-50);
}
.btn-large { padding: 17px 36px; font-size: 16px; }
.btn-block { width: 100%; }

/* 深色 CTA 面板内的按钮：白色半透明玻璃样式 */
.cta-panel .btn {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}
.cta-panel .btn:hover {
  background: rgba(255, 255, 255, 0.24);
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
  transform: translateY(-1px);
}
.cta-panel .btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}
.cta-panel .btn-outline:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

/* ============================================
   Hero 区 - 网格渐变背景
   ============================================ */
.hero {
  position: relative;
  padding: 90px 0 110px;
  overflow: hidden;
  background:
    radial-gradient(at 20% 25%, rgba(6, 182, 212, 0.12) 0%, transparent 50%),
    radial-gradient(at 80% 10%, rgba(14, 116, 144, 0.10) 0%, transparent 50%),
    radial-gradient(at 60% 80%, rgba(245, 158, 11, 0.06) 0%, transparent 50%),
    linear-gradient(180deg, #f0fdfa 0%, #ffffff 60%, #ffffff 100%);
}
.hero::before {
  content: "";
  position: absolute;
  top: 10%;
  right: 5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
  animation: heroFloat 12s ease-in-out infinite;
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: 10%;
  left: 5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
  animation: heroFloat 14s ease-in-out infinite 4s;
  pointer-events: none;
}
@keyframes heroFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -20px) scale(1.1); }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-content { position: relative; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 24px;
  border: 1px solid rgba(6, 182, 212, 0.2);
}
.hero-eyebrow .dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary-500);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
.hero-content h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 24px;
  color: var(--color-ink);
}
.hero-content h1 .highlight {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 60%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.hero-content h1 .highlight::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 8px;
  background: linear-gradient(90deg, var(--color-primary-100), transparent);
  border-radius: 4px;
  z-index: -1;
}
.hero-content p.lead {
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: 36px;
  max-width: 560px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  max-width: 560px;
}
.hero-stat .num {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -1px;
}
.hero-stat .label {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
}

.hero-image { position: relative; }
.hero-image .img-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  aspect-ratio: 4/3;
  background: var(--color-bg-alt);
}
.hero-image .img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(14, 116, 144, 0.1) 0%, transparent 50%);
  z-index: 1;
  pointer-events: none;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-badge {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(255, 255, 255, 0.8);
}
.hero-badge .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  flex-shrink: 0;
}
.hero-badge .icon.icon-amber {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
}
.hero-badge .text strong { display: block; font-size: 14px; font-weight: 700; color: var(--color-ink); }
.hero-badge .text span { font-size: 12px; color: var(--color-text-muted); }
.hero-badge-1 {
  top: 30px;
  left: -30px;
  animation: float 6s ease-in-out infinite;
}
.hero-badge-2 {
  bottom: 50px;
  right: -20px;
  animation: float 6s ease-in-out infinite 3s;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ============================================
   数据展示
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: #fff;
  padding: 36px 28px;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.stat-card:hover::before { transform: scaleX(1); }
.stat-card .icon-box {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 26px;
}
.stat-card .num {
  font-size: 44px;
  font-weight: 800;
  color: var(--color-ink);
  line-height: 1;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.stat-card .num small {
  font-size: 20px;
  font-weight: 700;
}
.stat-card .label {
  margin-top: 10px;
  font-size: 15px;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ============================================
   产品卡片网格 - 玻璃拟态
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}
.product-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, transparent 0%, var(--color-primary-500) 50%, transparent 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}
.product-card:hover::before { opacity: 1; }
.product-card .thumb {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.product-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s ease;
}
.product-card:hover .thumb img { transform: scale(1.08); }
.product-card .badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  color: #fff;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 100px;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
  z-index: 2;
}
.product-card .badge.green {
  background: linear-gradient(135deg, var(--color-success) 0%, #34d399 100%);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}
.product-card .badge.purple {
  background: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}
.product-card .body {
  padding: 28px 26px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-ink);
  line-height: 1.4;
}
.product-card .desc {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  flex: 1;
  line-height: 1.7;
}
.product-card .features {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}
.product-card .features span {
  padding: 4px 10px;
  background: var(--color-primary-50);
  color: var(--color-primary);
  font-size: 12px;
  border-radius: 6px;
  font-weight: 500;
}
.product-card .link {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
}
.product-card .link::after {
  content: "→";
  transition: transform var(--transition);
}
.product-card:hover .link::after { transform: translateX(6px); }

/* ============================================
   特性卡片
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  padding: 36px 30px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card .icon-box {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 26px;
  margin-bottom: 20px;
  transition: all var(--transition);
}
.feature-card:hover .icon-box {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  color: #fff;
  transform: scale(1.05) rotate(-3deg);
}
.feature-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-ink);
}
.feature-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================
   场景卡片
   ============================================ */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.scenario-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
  transition: transform var(--transition);
  box-shadow: var(--shadow-md);
}
.scenario-card:hover { transform: translateY(-6px); }
.scenario-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s ease;
}
.scenario-card:hover img { transform: scale(1.1); }
.scenario-card .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(12, 31, 51, 0.95) 0%, rgba(12, 31, 51, 0.3) 60%, rgba(12, 31, 51, 0) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 26px;
  color: #fff;
}
.scenario-card .scene-icon {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.scenario-card h3 {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 6px;
}
.scenario-card p {
  font-size: 13px;
  opacity: .9;
  line-height: 1.5;
}

/* ============================================
   流程时间线
   ============================================ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  margin-top: 30px;
  position: relative;
}
.process-step {
  text-align: center;
  position: relative;
}
.process-step::after {
  content: "";
  position: absolute;
  top: 30px;
  right: -10px;
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-500), transparent);
}
.process-step:last-child::after { display: none; }
.process-step .num {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(14, 116, 144, 0.3);
  position: relative;
  z-index: 1;
}
.process-step h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #fff;
}
.process-step p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}

/* ============================================
   选型对比表
   ============================================ */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
}
.comparison-table th,
.comparison-table td {
  padding: 16px 14px;
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 14px;
}
.comparison-table th {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
}
.comparison-table th:first-child,
.comparison-table td:first-child {
  text-align: left;
  font-weight: 600;
  background: var(--color-bg-alt);
  color: var(--color-ink);
}
.comparison-table tbody tr {
  transition: background var(--transition-fast);
}
.comparison-table tbody tr:hover { background: var(--color-primary-50); }
.comparison-table tbody tr:last-child td { border-bottom: 0; }
.comparison-table .level-1 { background: rgba(239, 68, 68, 0.08); color: #dc2626; font-weight: 600; }
.comparison-table .level-2 { background: rgba(245, 158, 11, 0.10); color: var(--color-accent-dark); font-weight: 600; }
.comparison-table .level-3 { background: rgba(6, 182, 212, 0.08); color: var(--color-primary); font-weight: 600; }
.comparison-table .level-4 { background: rgba(16, 185, 129, 0.10); color: var(--color-success); font-weight: 700; }
.comparison-table .icon-ok { color: var(--color-success); font-weight: 700; }
.comparison-table .icon-no { color: #dc2626; }

/* ============================================
   资质/证书
   ============================================ */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cert-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
}
.cert-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.cert-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}
.cert-card .label {
  padding: 14px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg-alt);
}

/* ============================================
   表单
   ============================================ */
.contact-form {
  background: #fff;
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 15px;
  background: var(--color-bg-alt);
  transition: all var(--transition-fast);
  color: var(--color-text);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.12);
}
.form-group textarea { resize: vertical; min-height: 110px; }

/* ============================================
   页脚
   ============================================ */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 70px 0 28px;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
  position: relative;
  z-index: 2;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-500), transparent);
  border-radius: 2px;
}
.footer-col ul li { margin-bottom: 10px; font-size: 14px; }
.footer-col a { color: rgba(255, 255, 255, 0.65); transition: color var(--transition-fast); }
.footer-col a:hover { color: var(--color-primary-300); }
.footer-brand p { font-size: 14px; line-height: 1.7; margin-top: 16px; opacity: .8; }
.footer-contact .item { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start; }
.footer-contact .item-icon {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 8px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--color-primary-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}
.footer-contact .item strong { color: #fff; font-weight: 600; display: block; margin-bottom: 4px; font-size: 13px; }
.footer-contact .item span, .footer-contact .item a { font-size: 13px; color: rgba(255, 255, 255, 0.65); line-height: 1.5; }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  position: relative;
  z-index: 2;
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: var(--color-primary-300); }

/* ============================================
   二级页面 Banner
   ============================================ */
.page-banner {
  position: relative;
  background:
    linear-gradient(135deg, rgba(12, 31, 51, 0.92) 0%, rgba(14, 116, 144, 0.78) 100%),
    url("../images/campus-wechat-day.jpg") center/cover;
  color: #fff;
  padding: 100px 0 90px;
  text-align: center;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(6, 182, 212, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
  pointer-events: none;
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -1px;
  line-height: 1.2;
}
.page-banner .crumb {
  font-size: 14px;
  opacity: .85;
  margin-bottom: 8px;
}
.page-banner .crumb a:hover { color: #fff; opacity: 1; }

/* ============================================
   微信浮动按钮 (FAB)
   ============================================ */
.wechat-fab {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
}
.wechat-fab .fab-main {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-wechat) 0%, var(--color-wechat-dark) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 12px 32px rgba(7, 193, 96, 0.4);
  transition: all var(--transition);
  position: relative;
  border: none;
  outline: none;
}
.wechat-fab .fab-main::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-wechat), var(--color-wechat-dark));
  opacity: 0.4;
  animation: fabPulse 2s ease-in-out infinite;
  z-index: -1;
}
@keyframes fabPulse {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50% { transform: scale(1.3); opacity: 0; }
}
.wechat-fab .fab-main:hover {
  transform: scale(1.05);
  box-shadow: 0 16px 40px rgba(7, 193, 96, 0.5);
}
.wechat-fab .fab-main svg {
  width: 32px;
  height: 32px;
  fill: #fff;
}
.wechat-fab .fab-tooltip {
  position: absolute;
  right: calc(100% + 14px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-ink);
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}
.wechat-fab .fab-tooltip::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--color-ink);
}
.wechat-fab .fab-main:hover .fab-tooltip {
  opacity: 1;
}

/* ============================================
   微信二维码弹窗
   ============================================ */
.wechat-modal {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  padding: 24px;
}
.wechat-modal.active {
  opacity: 1;
  pointer-events: auto;
}
.wechat-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(12, 31, 51, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.wechat-modal-card {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  max-width: 380px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  text-align: center;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition);
}
.wechat-modal.active .wechat-modal-card {
  transform: scale(1) translateY(0);
}
.wechat-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 18px;
  border: none;
}
.wechat-modal-close:hover {
  background: var(--color-ink);
  color: #fff;
  transform: rotate(90deg);
}
.wechat-modal-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 20px;
}
.wechat-modal-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-wechat) 0%, var(--color-wechat-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  box-shadow: 0 8px 24px rgba(7, 193, 96, 0.3);
}
.wechat-modal-icon svg { width: 30px; height: 30px; fill: #fff; }
.wechat-modal-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-ink);
  margin-bottom: 6px;
}
.wechat-modal-subtitle {
  font-size: 13px;
  color: var(--color-text-muted);
}
.wechat-modal-img-wrap {
  background: linear-gradient(135deg, #f0fdfa 0%, #ecfeff 100%);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 18px;
  display: inline-block;
  border: 1px solid var(--color-border-light);
}
.wechat-modal-img-wrap img {
  width: 240px;
  height: 240px;
  display: block;
  border-radius: 8px;
}
.wechat-modal-tip {
  font-size: 14px;
  color: var(--color-ink);
  font-weight: 600;
  margin-bottom: 6px;
}
.wechat-modal-tip small {
  display: block;
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-top: 4px;
}

/* 微信图标触发器（用于内嵌页面的链接） */
.wechat-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: var(--color-wechat);
  font-weight: 600;
  transition: all var(--transition-fast);
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}
.wechat-trigger:hover { color: var(--color-wechat-dark); }
.wechat-trigger .wx-icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--color-wechat), var(--color-wechat-dark));
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.wechat-trigger .wx-icon svg { width: 14px; height: 14px; fill: #fff; }

/* ============================================
   通用工具类
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mb-32 { margin-bottom: 32px; }
.mt-32 { margin-top: 32px; }
.divider {
  height: 1px;
  background: var(--color-border);
  margin: 40px 0;
}

/* 滚动渐入动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.3s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.4s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.5s; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr; gap: 50px; }
  .hero-content h1 { font-size: 44px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .process-step:nth-child(3)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .section-title { font-size: 32px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .product-detail-grid,
  .scenario-row,
  .about-grid,
  .contact-grid { grid-template-columns: 1fr !important; }
  .contact-cards { grid-template-columns: repeat(2, 1fr) !important; }
  .page-banner h1 { font-size: 36px; }
  .blog-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(4, 1fr); }
  .case-highlight-grid { grid-template-columns: repeat(2, 1fr); }
  .article-hero h1 { font-size: 32px; }
}
@media (max-width: 768px) {
  :root { --header-height: 64px; }
  section { padding: 64px 0; }
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 0;
    box-shadow: var(--shadow-md);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-menu a { padding: 14px 24px; border-radius: 0; }
  .nav-menu a.active { background: var(--color-primary-50); }
  .nav-cta { margin: 8px 24px !important; padding: 12px 18px !important; text-align: center; }
  .menu-toggle { display: flex; }
  .menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
  .menu-toggle.open span:nth-child(2) { opacity: 0; }
  .menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

  .hero-content h1 { font-size: 34px; letter-spacing: -1px; }
  .hero-content p.lead { font-size: 16px; }
  .hero-stats { gap: 20px; }
  .hero-stat .num { font-size: 28px; }
  .hero-badge { display: none; }

  .products-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr 1fr; }
  .cert-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-step::after { display: none; }
  .contact-cards { grid-template-columns: 1fr 1fr !important; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { justify-content: center; text-align: center; }

  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 24px; }

  .page-banner h1 { font-size: 30px; }
  .page-banner { padding: 70px 0 60px; }
  .section-title { font-size: 26px; }
  .section-subtitle { font-size: 15px; }

  .comparison-table { font-size: 12px; }
  .comparison-table th, .comparison-table td { padding: 10px 6px; }

  .wechat-fab { right: 16px; bottom: 16px; }
  .wechat-fab .fab-main { width: 56px; height: 56px; }
  .wechat-fab .fab-main svg { width: 28px; height: 28px; }
  .wechat-modal-card { padding: 28px 24px; }
  .wechat-modal-img-wrap img { width: 200px; height: 200px; }
  .blog-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .case-highlight-grid { grid-template-columns: 1fr; }
  .article-hero h1 { font-size: 28px; }
  .article-nav { flex-direction: column; }
  .article-nav a { max-width: 100%; }
  .custom-grid { grid-template-columns: 1fr !important; }
}

/* ============================================
   技术分享 - 文章卡片
   ============================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.blog-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.blog-card-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 52px;
  position: relative;
  overflow: hidden;
}
.blog-card-thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,.15) 0%, transparent 60%);
}
.blog-card-thumb.amber {
  background: linear-gradient(135deg, var(--color-accent-dark) 0%, var(--color-accent) 100%);
}
.blog-card-thumb.teal {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
}
.blog-card-thumb .thumb-icon {
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,.2));
}
.blog-card-body {
  padding: 28px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.blog-card .tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: var(--color-primary-50);
  color: var(--color-primary);
  margin-bottom: 14px;
}
.blog-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 10px;
  line-height: 1.4;
}
.blog-card .excerpt {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}
.blog-card .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--color-text-light);
  padding-top: 14px;
  border-top: 1px solid var(--color-border-light);
}
.blog-card .meta .read-more {
  color: var(--color-primary);
  font-weight: 600;
}

/* ============================================
   文章详情页
   ============================================ */
.article-hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-primary) 60%, var(--color-primary-500) 100%);
  color: #fff;
  padding: 90px 0 70px;
  overflow: hidden;
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 25%, rgba(6,182,212,.25) 0%, transparent 50%),
    radial-gradient(circle at 85% 75%, rgba(245,158,11,.12) 0%, transparent 50%);
}
.article-hero .container { position: relative; z-index: 2; }
.article-hero .article-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(255,255,255,.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.25);
  margin-bottom: 20px;
}
.article-hero h1 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.3;
}
.article-hero .article-meta {
  display: flex;
  gap: 24px;
  font-size: 14px;
  opacity: .85;
  flex-wrap: wrap;
}
.article-body {
  max-width: 820px;
  margin: 0 auto;
  padding: 50px 0;
}
.article-body .article-intro {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text);
  padding: 24px 28px;
  border-left: 4px solid var(--color-primary-500);
  background: linear-gradient(135deg, var(--color-primary-50) 0%, transparent 100%);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 40px;
  font-weight: 500;
}
.article-body h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--color-ink);
  margin: 44px 0 18px;
  padding-left: 16px;
  border-left: 4px solid var(--color-primary);
  line-height: 1.4;
}
.article-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 32px 0 12px;
}
.article-body p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 16px;
}
.article-body ul, .article-body ol {
  margin: 16px 0 24px;
  padding-left: 24px;
}
.article-body li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 8px;
}
.article-body blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--color-accent);
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
}
.article-body .info-box {
  margin: 28px 0;
  padding: 20px 24px;
  background: linear-gradient(135deg, #fff7ed 0%, #fffbeb 100%);
  border: 1px solid rgba(245,158,11,.2);
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink);
}
.article-body .info-box strong { color: var(--color-accent-dark); }
.article-body .nav-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 20px;
  transition: gap var(--transition-fast);
}
.article-body .nav-back:hover { gap: 12px; }
.article-footer-cta {
  margin-top: 50px;
  padding: 36px;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, #ecfeff 100%);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  text-align: center;
}
.article-footer-cta h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
}
.article-footer-cta p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--color-border-light);
  flex-wrap: wrap;
}
.article-nav a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  max-width: 48%;
}
.article-nav a:hover {
  background: var(--color-primary-50);
  transform: translateX(4px);
}
.article-nav a .nav-label { font-size: 12px; color: var(--color-text-light); }
.article-nav a .nav-title { font-size: 14px; font-weight: 600; color: var(--color-ink); }

/* ============================================
   成功案例
   ============================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  text-align: center;
  padding: 36px 20px;
  position: relative;
  overflow: hidden;
}
.case-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.case-card:hover::before { transform: scaleX(1); }
.case-card .case-logo {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  transition: all var(--transition);
}
.case-card:hover .case-logo {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-500) 100%);
  color: #fff;
}
.case-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
  line-height: 1.4;
}
.case-card .case-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  background: var(--color-primary-50);
  color: var(--color-primary);
  margin-top: 4px;
}
.case-card p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-top: 10px;
}

/* 案例亮点 */
.case-highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-highlight {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px 26px;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.case-highlight::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.case-highlight:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.case-highlight:hover::before { transform: scaleX(1); }
.case-highlight .icon-box {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, #fff7ed 0%, #fef3c7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 18px;
}
.case-highlight h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 10px;
}
.case-highlight p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}