/* ============================================
   有信生物 - 企业官网样式
   风格：科技感 / 实验室风格 / 蓝绿主色调
   ============================================ */

:root {
  /* 品牌色 - 有信生物标准色（蓝绿渐变） */
  --primary: #1290B3;
  --primary-dark: #0E7A99;
  --primary-light: #2EA585;
  --primary-soft: #E8F4F8;
  --primary-gradient: linear-gradient(135deg, #1290B3 0%, #2EA585 100%);
  --primary-gradient-vertical: linear-gradient(180deg, #1290B3 0%, #2EA585 100%);
  --primary-glow: rgba(18, 144, 179, 0.3);

  /* 辅助色 - 科技感荧光色 */
  --cyan: #06B6D4;
  --teal: #14B8A6;
  --emerald: #10B981;
  --neon-cyan: #22D3EE;

  /* 深色背景色 */
  --dark-bg: #0F172A;
  --dark-surface: #1E293B;
  --dark-surface-2: #334155;
  --dark-border: #475569;

  /* 中性色 */
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --gray-950: #020617;

  /* 语义化变量 */
  --bg: #FFFFFF;
  --bg-alt: #F8FAFC;
  --text: #1E293B;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --border-light: #F1F5F9;

  /* 阴影 */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -1px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -2px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 30px rgba(18, 144, 179, 0.15);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* 容器宽度 */
  --container-max: 1200px;

  /* 过渡 */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.3;
}

/* ============================================
   实验室/科技感装饰元素
   ============================================ */

/* 网格背景 */
.grid-bg {
  background-image:
    linear-gradient(rgba(18, 144, 179, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 144, 179, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.grid-bg-dark {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* 点阵背景 */
.dot-bg {
  background-image: radial-gradient(rgba(18, 144, 179, 0.1) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 发光效果 */
.glow-effect {
  position: relative;
}

.glow-effect::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 60%);
  opacity: 0.5;
  pointer-events: none;
}

/* DNA/分子装饰线 */
.dna-decoration {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.06;
}

.dna-decoration::before,
.dna-decoration::after {
  content: '';
  position: absolute;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent 0%, var(--primary) 50%, transparent 100%);
}

.dna-decoration::before {
  left: 10%;
  animation: dnaFloat 8s ease-in-out infinite;
}

.dna-decoration::after {
  right: 10%;
  animation: dnaFloat 8s ease-in-out infinite reverse;
}

@keyframes dnaFloat {
  0%, 100% { transform: translateY(0); opacity: 0.3; }
  50% { transform: translateY(20px); opacity: 0.6; }
}

/* ============================================
   容器
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(18, 144, 179, 0.4);
}

.btn-primary:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(18, 144, 179, 0.5);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::after {
  left: 100%;
}

.btn-secondary {
  background: white;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary-soft);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-outline-white {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.8);
}

.btn-outline-white:hover {
  background: white;
  color: var(--primary-dark);
}

.btn-dark {
  background: var(--gray-800);
  color: white;
}

.btn-dark:hover {
  background: var(--gray-700);
  color: white;
}

.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
}

/* ============================================
   顶部导航
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.95);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
}

.logo img {
  height: 36px;
  transition: var(--transition);
}

.logo:hover img {
  filter: drop-shadow(0 2px 8px var(--primary-glow));
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  color: var(--gray-600);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: var(--space-2) 0;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

.nav-cta {
  margin-left: var(--space-4);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--gray-700);
}

/* ============================================
   Hero 区域 - 科技感设计
   ============================================ */
.hero {
  position: relative;
  padding: 160px 0 120px;
  background: var(--gray-900);
  overflow: hidden;
  color: white;
}

.hero .grid-bg-dark {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(18, 144, 179, 0.3) 0%, transparent 60%);
  border-radius: 50%;
  z-index: 0;
  filter: blur(40px);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.25) 0%, transparent 60%);
  border-radius: 50%;
  z-index: 0;
  filter: blur(40px);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--neon-cyan);
  font-weight: 500;
  margin-bottom: var(--space-6);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--emerald);
  border-radius: 50%;
  animation: pulse 2s infinite;
  box-shadow: 0 0 10px var(--emerald);
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 10px var(--emerald); }
  50% { opacity: 0.6; box-shadow: 0 0 20px var(--emerald); }
}

.hero h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-5);
  letter-spacing: -1px;
  color: white;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #22D3EE 0%, #34D399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: var(--space-8);
  max-width: 540px;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-features {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero-feature-icon {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.hero-feature-text {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.4;
}

.hero-feature-text strong {
  display: block;
  font-size: 15px;
  color: white;
  margin-bottom: 2px;
  font-weight: 600;
}

/* Hero 产品卡片 - 玻璃拟态 */
.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-product-card {
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  max-width: 380px;
  width: 100%;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.hero-product-card::before {
  content: '热销产品';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 20px;
  background: var(--primary-gradient);
  color: white;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(18, 144, 179, 0.4);
  white-space: nowrap;
}

.product-tube-visual {
  width: 160px;
  margin: var(--space-6) auto;
}

.product-tube-visual img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.hero-product-title {
  font-size: 20px;
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-2);
}

.hero-product-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: var(--space-5);
}

.hero-product-stats {
  display: flex;
  justify-content: space-around;
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-product-stat {
  text-align: center;
}

.hero-product-stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--neon-cyan);
  text-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
}

.hero-product-stat-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 2px;
}

/* ============================================
   通用区块
   ============================================ */
.section {
  padding: var(--space-20) 0;
  position: relative;
}

.section-alt {
  background: var(--gray-50);
}

.section-dark {
  background: var(--gray-900);
  color: white;
}

.section-dark .section-title {
  color: white;
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
  position: relative;
}

.section-badge {
  display: inline-block;
  padding: 6px 18px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  position: relative;
}

.section-dark .section-badge {
  background: rgba(34, 211, 238, 0.15);
  color: var(--neon-cyan);
  border: 1px solid rgba(34, 211, 238, 0.2);
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ============================================
   产品卡片网格
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.product-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
  border-color: var(--primary);
}

.product-card.featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.product-card-badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 2;
  padding: 4px 14px;
  background: var(--primary-gradient);
  color: white;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(18, 144, 179, 0.3);
}

.product-card-image {
  position: relative;
  height: 220px;
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card.featured .product-card-image {
  height: 100%;
}

.product-card-image img {
  transition: var(--transition);
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-body {
  padding: var(--space-6);
}

.product-card-category {
  font-size: 12px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.product-card-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.product-card-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.product-card-feature {
  font-size: 12px;
  padding: 4px 10px;
  background: var(--gray-100);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-light);
}

.product-card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.product-card-link:hover {
  gap: var(--space-3);
}

/* ============================================
   优势特性卡片
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: white;
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: var(--transition);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  background: var(--primary-soft);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--primary-gradient);
  transform: scale(1.1);
  color: white;
  box-shadow: 0 8px 20px var(--primary-glow);
}

.feature-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================
   数据统计 - 深色科技感
   ============================================ */
.stats-section {
  background: var(--gray-900);
  color: white;
  padding: var(--space-16) 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}

.stats-section::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(18, 144, 179, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.stats-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.stat-item {
  padding: var(--space-6);
  position: relative;
}

.stat-item::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 60px;
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.stat-item:last-child::after {
  display: none;
}

.stat-number {
  font-size: 48px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: var(--space-3);
  background: linear-gradient(135deg, #22D3EE 0%, #34D399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(34, 211, 238, 0.3);
}

.stat-number sup {
  font-size: 24px;
  font-weight: 600;
}

.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   应用领域卡片
   ============================================ */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.application-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.application-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: var(--primary-soft);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: var(--transition);
}

.application-card:hover .application-icon {
  background: var(--primary-gradient);
  color: white;
}

.application-content h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.application-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================
   CTA 区块
   ============================================ */
.cta-section {
  padding: var(--space-20) 0;
  background: var(--gray-50);
}

.cta-box {
  background: var(--gray-900);
  border-radius: var(--radius-2xl);
  padding: var(--space-16) var(--space-12);
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.cta-box::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(18, 144, 179, 0.3) 0%, transparent 60%);
  border-radius: 50%;
  filter: blur(40px);
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-box h2 {
  font-size: 32px;
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
}

.cta-box p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-8);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.cta-buttons .btn:first-child {
  background: white;
  color: var(--primary-dark);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.cta-buttons .btn:first-child:hover {
  background: var(--gray-100);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

/* ============================================
   页脚 - 深色
   ============================================ */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: var(--space-16) 0 var(--space-6);
  position: relative;
  overflow: hidden;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 20px;
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
}

.footer-logo img {
  height: 32px;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: var(--space-5);
  color: var(--gray-400);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: var(--gray-800);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 16px;
  transition: var(--transition);
  border: 1px solid var(--gray-700);
}

.footer-social a:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 4px 12px var(--primary-glow);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-5);
  position: relative;
  padding-bottom: var(--space-3);
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: 14px;
  color: var(--gray-400);
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--neon-cyan);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: 14px;
  line-height: 1.6;
}

.footer-contact-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--gray-800);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  border: 1px solid var(--gray-700);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer-bottom-links a {
  color: var(--gray-400);
  transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
  color: var(--neon-cyan);
  text-decoration: underline;
}

/* ============================================
   面包屑
   ============================================ */
.breadcrumb-bar {
  margin-top: 72px;
  padding: var(--space-4) 0;
  background: var(--gray-50);
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb-sep {
  color: var(--gray-300);
}

.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
}

/* ============================================
   页面标题区 - 深色
   ============================================ */
.page-header {
  margin-top: 72px;
  padding: var(--space-20) 0;
  background: var(--gray-900);
  position: relative;
  overflow: hidden;
  color: white;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-header::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(18, 144, 179, 0.2) 0%, transparent 60%);
  border-radius: 50%;
  filter: blur(40px);
}

.page-header-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.page-header h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: white;
}

.page-header p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   产品详情页
   ============================================ */
.product-detail {
  padding: var(--space-16) 0;
}

.product-detail-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  margin-bottom: var(--space-16);
}

.product-gallery {
  position: sticky;
  top: 100px;
}

.product-main-image {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  border: 1px solid var(--border);
  min-height: 450px;
}

.product-main-image img {
  max-height: 400px;
  max-width: 100%;
  width: auto;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.product-thumbnails {
  display: flex;
  gap: var(--space-3);
}

.product-thumb {
  width: 80px;
  height: 80px;
  background: var(--gray-50);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 28px;
  overflow: hidden;
}

.product-thumb:hover,
.product-thumb.active {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.product-info-category {
  display: inline-block;
  padding: 4px 14px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.product-info h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.product-info-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.8;
}

.product-info-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-8);
  border: 1px solid var(--border);
}

.product-info-stat {
  text-align: center;
}

.product-info-stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.product-info-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.product-info-section {
  margin-bottom: var(--space-8);
}

.product-info-section h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.product-info-section h3::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

.product-features-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.product-feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--gray-50);
  border-radius: var(--radius-md);
}

.product-feature-item-icon {
  flex-shrink: 0;
  color: var(--primary);
  font-size: 16px;
  margin-top: 2px;
}

.product-feature-item-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.product-info-actions {
  display: flex;
  gap: var(--space-4);
}

/* 产品详情标签页 */
.product-tabs {
  border-top: 1px solid var(--border);
  padding-top: var(--space-12);
}

.tab-nav {
  display: flex;
  gap: var(--space-8);
  border-bottom: 2px solid var(--border);
  margin-bottom: var(--space-8);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-3) 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.tab-btn:hover {
  color: var(--primary);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.tab-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--space-5);
}

.tab-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.tab-content p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
  line-height: 1.8;
}

.tab-content ul {
  margin-left: var(--space-5);
  margin-bottom: var(--space-4);
}

.tab-content ul li {
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  position: relative;
  padding-left: var(--space-4);
}

.tab-content ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 600;
}

/* 规格表 */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-6);
}

.spec-table th,
.spec-table td {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

.spec-table thead th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-900);
  border-bottom: 2px solid var(--border);
}

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

.spec-table th[scope="row"] {
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--gray-50);
  width: 30%;
}

/* 使用步骤 */
.steps-list {
  counter-reset: step;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.step-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  position: relative;
}

.step-item::before {
  counter-increment: step;
  content: counter(step);
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--primary-gradient);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 15px;
}

.step-item-content h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: var(--space-2);
  margin-top: 0;
}

.step-item-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* 注意事项卡片 */
.notice-card {
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-6);
}

.notice-card-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 15px;
  font-weight: 600;
  color: #92400E;
  margin-bottom: var(--space-3);
}

.notice-card ul {
  margin-left: var(--space-5);
  margin-bottom: 0;
}

.notice-card ul li {
  color: #78350F;
  font-size: 14px;
  margin-bottom: var(--space-2);
  position: relative;
  padding-left: var(--space-4);
}

.notice-card ul li::before {
  content: '⚠';
  position: absolute;
  left: 0;
}

/* ============================================
   关于我们页面
   ============================================ */
.about-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  padding: var(--space-20) 0;
}

.about-content h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: var(--space-5);
}

.about-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: var(--space-5);
}

.about-visual {
  position: relative;
  height: 400px;
  background: var(--gray-900);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  overflow: hidden;
}

.about-visual::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 30px 30px;
}

.about-visual::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(18, 144, 179, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.value-card {
  padding: var(--space-6);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.value-card-icon {
  font-size: 32px;
  margin-bottom: var(--space-3);
}

.value-card h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.value-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 公司历程 */
.timeline {
  position: relative;
  padding-left: var(--space-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-10) + 4px);
  top: 4px;
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 0 0 2px var(--primary);
}

.timeline-year {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-2);
}

.timeline-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.timeline-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================
   联系我们页面
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-10);
  padding: var(--space-16) 0;
}

.contact-info-card {
  background: var(--gray-900);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  color: white;
  position: relative;
  overflow: hidden;
}

.contact-info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
}

.contact-info-card::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: -20%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(18, 144, 179, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
}

.contact-info-card h3 {
  font-size: 24px;
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-2);
  position: relative;
}

.contact-info-card > p {
  font-size: 14px;
  opacity: 0.7;
  margin-bottom: var(--space-8);
  position: relative;
}

.contact-info-list {
  position: relative;
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.contact-info-text h4 {
  font-size: 14px;
  font-weight: 600;
  color: white;
  margin-bottom: 4px;
}

.contact-info-text p {
  font-size: 14px;
  opacity: 0.75;
  margin: 0;
  line-height: 1.6;
}

/* 联系表单 */
.contact-form {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.contact-form-desc {
  color: var(--text-muted);
  margin-bottom: var(--space-6);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition);
  font-family: inherit;
  color: var(--text);
  background: white;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(18, 144, 179, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   产品筛选
   ============================================ */
.product-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-btn.active {
  background: var(--primary-gradient);
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 12px var(--primary-glow);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-image {
    order: -1;
  }

  .hero-product-card {
    max-width: 320px;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-card.featured {
    grid-column: span 2;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-item::after {
    display: none;
  }

  .applications-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .product-detail-main {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .product-gallery {
    position: static;
  }

  .about-hero {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero {
    padding: 120px 0 80px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .hero-features {
    flex-wrap: wrap;
    gap: var(--space-5);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .section-title {
    font-size: 24px;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .product-card.featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

  .product-card.featured .product-card-image {
    height: 220px;
  }

  .features-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .feature-card {
    padding: var(--space-6) var(--space-4);
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .stat-number {
    font-size: 36px;
  }

  .applications-grid {
    grid-template-columns: 1fr;
  }

  .cta-box {
    padding: var(--space-10) var(--space-6);
  }

  .cta-box h2 {
    font-size: 22px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .page-header {
    padding: var(--space-12) 0;
  }

  .page-header h1 {
    font-size: 26px;
  }

  .product-features-list {
    grid-template-columns: 1fr;
  }

  .product-info-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .steps-list {
    grid-template-columns: 1fr;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .product-info-actions {
    flex-direction: column;
  }

  .product-info-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .hero-product-stats {
    flex-wrap: wrap;
    gap: var(--space-3);
  }
}