/* ========================================
   冰雪圣巴企业官网 - 高端大气UI样式
   立体感 · 层次感 · 动画感
   ======================================== */

/* CSS Variables */
:root {
  --accent: #1a5fb4;
  --accent2: #3584e4;
  --accent-light: #e8f0fe;
  --accent-glow: rgba(26, 95, 180, 0.3);
  --bg: #ffffff;
  --bg2: #f6f8fa;
  --bg3: #edf2f7;
  --ink: #1c1c1c;
  --ink-light: #2d3748;
  --muted: #6b7280;
  --muted-light: #9ca3af;
  --rule: #e5e7eb;
  --rule-dark: #d1d5db;
  --success: #10b981;
  --warning: #f59e0b;
  --gold: #d4a853;
  --gold-light: #f5e6c8;
  /* 3D阴影系统 */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.1), 0 4px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-xl: 0 20px 48px rgba(0,0,0,0.14), 0 8px 20px rgba(0,0,0,0.08);
  --shadow-2xl: 0 28px 64px rgba(0,0,0,0.16), 0 12px 28px rgba(0,0,0,0.1);
  --shadow-accent: 0 8px 32px rgba(26, 95, 180, 0.25);
  --shadow-glass: 0 8px 32px rgba(0,0,0,0.12);
  /* 玻璃拟态 */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-blur: blur(20px);
  /* 圆角 */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  /* 过渡 */
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --max-width: 1280px;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

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

/* 手机端紧凑适配 */
@media (max-width: 767px) {
  :root {
    --header-height: 64px;
  }
  .logo img {
    height: 48px;
  }
  .footer-brand .logo img {
    height: 48px;
  }
}

@media (min-width: 768px) {
  .container {
    padding: 0 32px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 48px;
  }
}

/* ========================================
   Header & Navigation - 玻璃拟态导航
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255,255,255,0.88);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  height: 56px;
  width: auto;
  display: block;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.1));
  transition: var(--transition);
}

.logo img:hover {
  filter: drop-shadow(0 6px 20px rgba(0,0,0,0.18));
  transform: scale(1.05) translateY(-2px);
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(26, 95, 180, 0.3);
}

.nav {
  display: none;
}

.nav-list {
  display: flex;
  gap: 4px;
  background: rgba(0,0,0,0.03);
  padding: 4px;
  border-radius: var(--radius);
}

.nav-link {
  display: block;
  padding: 8px 20px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-light);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--accent);
  background: rgba(26, 95, 180, 0.06);
}

.nav-link.active {
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 4px 12px rgba(26, 95, 180, 0.35);
}

.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: var(--transition);
  border-radius: 2px;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(24px);
  z-index: 999;
  padding: 24px;
}

.mobile-nav.active {
  display: block;
  animation: fadeSlideDown 0.3s ease;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-nav-link {
  display: block;
  padding: 16px 20px;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink-light);
  border-radius: var(--radius);
  transition: var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--accent);
  background: var(--accent-light);
}

@media (min-width: 768px) {
  .logo img {
    height: 56px;
  }
  .nav {
    display: block;
  }
  .mobile-menu-btn {
    display: none;
  }
  .mobile-nav {
    display: none !important;
  }
}

@media (min-width: 1024px) {
  .logo img {
    height: 64px;
  }
}

/* ========================================
   Hero Section - 沉浸式轮播
   ======================================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  max-height: 900px;
  overflow: hidden;
  margin-top: var(--header-height);
}

.hero-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1), visibility 1.2s;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
}

.hero-slide-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  transition: transform 8s ease-out;
}

.hero-slide.active .hero-slide-bg {
  transform: scale(1);
}

.hero-slide-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.1) 100%);
}

/* 英雄区装饰粒子 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(26, 95, 180, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(53, 132, 228, 0.1) 0%, transparent 50%);
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  align-items: center;
}

.hero-text {
  max-width: 640px;
  color: white;
  padding: 0 24px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 30px;
  margin-bottom: 24px;
  letter-spacing: 0.08em;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
  letter-spacing: -0.01em;
}

.hero-desc {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 36px;
  opacity: 0.88;
  max-width: 520px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::after {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  box-shadow: 0 6px 20px rgba(26, 95, 180, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(26, 95, 180, 0.5);
}

.btn-outline {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  color: white;
  border: 2px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.7);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.hero-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid rgba(255,255,255,0.3);
}

.hero-dot.active {
  background: white;
  transform: scale(1.2);
  border-color: white;
  box-shadow: 0 0 12px rgba(255,255,255,0.5);
}

.hero-dot:hover {
  background: rgba(255,255,255,0.6);
}

.hero-arrows {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 10;
  pointer-events: none;
}

.hero-arrow {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  pointer-events: auto;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.15);
}

.hero-arrow:hover {
  background: rgba(255,255,255,0.25);
  transform: scale(1.1);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.5rem;
  }
  .hero-desc {
    font-size: 1.15rem;
  }
  .hero-arrow {
    width: 56px;
    height: 56px;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 4rem;
  }
}

/* ========================================
   Section Styles - 分区装饰
   ======================================== */
.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background: var(--bg2);
}

/* 分区背景装饰 - 流动渐变球 */
.section-decor {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.06;
  pointer-events: none;
  z-index: 0;
}

.section-decor-1 {
  width: 400px;
  height: 400px;
  background: var(--accent);
  top: -100px;
  right: -100px;
}

.section-decor-2 {
  width: 300px;
  height: 300px;
  background: var(--accent2);
  bottom: -80px;
  left: -80px;
}

.section > .container {
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 72px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  background: linear-gradient(135deg, var(--accent-light), rgba(53, 132, 228, 0.08));
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 30px;
  margin-bottom: 16px;
  letter-spacing: 0.06em;
  border: 1px solid rgba(26, 95, 180, 0.1);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 20px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1.15rem;
  color: var(--muted);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .section {
    padding: 120px 0;
  }
  .section-title {
    font-size: 3rem;
  }
}

/* ========================================
   Cards - 玻璃拟态卡片
   ======================================== */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--glass-border);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(26, 95, 180, 0.15);
}

.card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.card-body {
  padding: 24px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ink);
}

.card-text {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ========================================
   Feature/Service Items - 3D悬浮卡片
   ======================================== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.feature-item {
  padding: 40px 32px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

/* 卡片顶部装饰线 */
.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  opacity: 0;
  transition: var(--transition);
}

.feature-item::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(26, 95, 180, 0.06), transparent 70%);
  border-radius: 50%;
  transform: translate(30%, -30%);
  transition: var(--transition);
}

.feature-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(26, 95, 180, 0.12);
}

.feature-item:hover::before {
  opacity: 1;
}

.feature-item:hover::after {
  transform: translate(20%, -20%) scale(1.5);
  opacity: 1;
}

.feature-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
  margin-bottom: 20px;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover .feature-img {
  transform: scale(1.04);
}

.feature-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--accent-light), rgba(53, 132, 228, 0.08));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent);
  font-size: 2rem;
  box-shadow: 0 4px 16px rgba(26, 95, 180, 0.12);
  transition: var(--transition-bounce);
  position: relative;
  z-index: 1;
}

.feature-item:hover .feature-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 8px 24px rgba(26, 95, 180, 0.2);
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ========================================
   Stats - 数据展示卡片
   ======================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.stat-item {
  text-align: center;
  padding: 36px 24px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 500;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .stat-number {
    font-size: 3.2rem;
  }
}

/* ========================================
   Page Banner - 沉浸式页头
   ======================================== */
.page-banner {
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-top: var(--header-height);
  overflow: hidden;
}

.page-banner-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transform: scale(1.08);
  transition: transform 6s ease-out;
}

.page-banner-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0,0,0,0.7) 0%, rgba(26, 95, 180, 0.4) 100%);
}

.page-banner-content {
  position: relative;
  z-index: 2;
  color: white;
  padding: 0 24px;
}

.page-banner-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 12px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
  letter-spacing: -0.01em;
}

.page-banner-desc {
  font-size: 1.05rem;
  opacity: 0.85;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

/* 页头装饰线 */
.page-banner-content::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, white, rgba(255,255,255,0.3));
  margin: 20px auto 0;
  border-radius: 3px;
}

@media (min-width: 768px) {
  .page-banner {
    height: 440px;
  }
  .page-banner-title {
    font-size: 3rem;
  }
}

/* ========================================
   Image Gallery / Upload
   ======================================== */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.gallery-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
}

.gallery-item img,
.gallery-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item:hover img,
.gallery-item:hover video {
  transform: scale(1.08);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px 20px 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.2) 60%, transparent 100%);
  color: white;
  transform: translateY(100%);
  transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

@media (min-width: 640px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--rule-dark);
  border-radius: var(--radius-xl);
  padding: 48px 24px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.upload-area:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: var(--shadow-accent);
  transform: translateY(-2px);
}

.upload-icon {
  font-size: 2.5rem;
  color: var(--muted);
  margin-bottom: 16px;
}

.upload-text {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.upload-hint {
  font-size: 0.8rem;
  color: var(--muted-light);
}

/* ========================================
   Timeline - 高端时间轴
   ======================================== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2), var(--accent));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  padding-bottom: 40px;
}

.timeline-dot {
  position: absolute;
  left: 11px;
  top: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: 4px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent), 0 4px 12px rgba(26, 95, 180, 0.25);
  transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.2);
  box-shadow: 0 0 0 3px var(--accent), 0 4px 20px rgba(26, 95, 180, 0.4);
}

.timeline-year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .timeline-item {
    padding-left: 0;
    width: 50%;
  }
  .timeline-item:nth-child(odd) {
    padding-right: 60px;
    text-align: right;
  }
  .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 60px;
  }
  .timeline-dot {
    left: auto;
  }
  .timeline-item:nth-child(odd) .timeline-dot {
    right: -10px;
  }
  .timeline-item:nth-child(even) .timeline-dot {
    left: -10px;
  }
}

/* ========================================
   Contact Form - 高端表单
   ======================================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--ink-light);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  font-size: 0.95rem;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--ink);
  transition: var(--transition);
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(26, 95, 180, 0.1), var(--shadow-sm);
  background: white;
}

.form-input:hover,
.form-textarea:hover {
  border-color: var(--rule-dark);
}

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

/* ========================================
   Footer - 高端页脚
   ======================================== */
.footer {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: rgba(255,255,255,0.7);
  padding: 72px 0 24px;
  position: relative;
  overflow: hidden;
}

/* 页脚装饰 */
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand .logo img {
  height: 56px;
  width: auto;
  background: white;
  padding: 6px 14px;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  transition: var(--transition);
}

.footer-brand .logo img:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.3);
  transform: translateY(-2px);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  color: white;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent2), transparent);
  border-radius: 2px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.9rem;
  transition: var(--transition);
  position: relative;
  padding-left: 0;
}

.footer-links a:hover {
  color: white;
  padding-left: 8px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.footer-contact .icon {
  color: var(--accent2);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }
}

/* ========================================
   Lightbox - 沉浸式灯箱
   ======================================== */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(8px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.3s ease;
}

.lightbox.active {
  display: flex;
}

.lightbox img,
.lightbox video {
  max-width: 90%;
  max-height: 90%;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.15);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
  transform: rotate(90deg);
}

/* ========================================
   Scroll to top - 高端回到顶部
   ======================================== */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-accent);
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 12px 36px rgba(26, 95, 180, 0.45);
}

/* ========================================
   Animations - 高端动画系统
   ======================================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(26, 95, 180, 0.15); }
  50% { box-shadow: 0 0 40px rgba(26, 95, 180, 0.3); }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.animate-in {
  animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Scroll reveal - 高级滚动揭示 */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 交错动画延迟 */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* 从左/右滑入 */
.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* 缩放揭示 */
.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ========================================
   Product Card - 高端产品卡片
   ======================================== */
.product-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--glass-border);
  position: relative;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  opacity: 0;
  transition: var(--transition);
  z-index: 2;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: rgba(26, 95, 180, 0.15);
}

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

.product-card-img {
  position: relative;
  height: 260px;
  overflow: hidden;
}

.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-card-img img {
  transform: scale(1.08);
}

/* 产品图片光泽效果 */
.product-card-img::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.6s ease;
  pointer-events: none;
}

.product-card:hover .product-card-img::after {
  left: 120%;
}

.product-card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 5px 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(26, 95, 180, 0.35);
  z-index: 1;
  letter-spacing: 0.05em;
}

.product-card-body {
  padding: 24px;
}

.product-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-card-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.product-card-link:hover {
  gap: 12px;
  color: var(--accent2);
}

/* ========================================
   Two Column Layout - 双栏布局
   ======================================== */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.two-col-img {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  position: relative;
  transition: var(--transition);
}

.two-col-img::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.1);
  pointer-events: none;
}

.two-col-img:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-2xl);
}

.two-col-img img {
  width: 100%;
  height: auto;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.two-col-img:hover img {
  transform: scale(1.04);
}

.two-col-content h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.two-col-content p {
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

@media (min-width: 768px) {
  .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========================================
   Video Section
   ======================================== */
.video-wrapper {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.video-wrapper video {
  width: 100%;
  display: block;
}

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: rgba(26, 95, 180, 0.9);
  backdrop-filter: blur(8px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.6rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 8px 32px rgba(26, 95, 180, 0.4);
  border: 2px solid rgba(255,255,255,0.2);
}

.video-play-btn:hover {
  background: var(--accent);
  transform: translate(-50%, -50%) scale(1.15);
  box-shadow: 0 12px 40px rgba(26, 95, 180, 0.5);
}

/* ========================================
   Certificate / Honor - 荣誉卡片
   ======================================== */
.cert-item {
  text-align: center;
  padding: 32px 24px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.cert-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--gold), var(--accent2));
  transition: width 0.4s ease;
}

.cert-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(26, 95, 180, 0.12);
}

.cert-item:hover::before {
  width: 100%;
}

.cert-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--accent-light), rgba(53, 132, 228, 0.08));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.5rem;
  box-shadow: 0 4px 16px rgba(26, 95, 180, 0.1);
  transition: var(--transition-bounce);
}

.cert-item:hover .cert-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 8px 24px rgba(26, 95, 180, 0.2);
}

.cert-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.cert-desc {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ========================================
   CTA Section - 行动召唤区
   ======================================== */
.cta-section {
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.1), transparent 70%);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.08), transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite reverse;
}

/* ========================================
   Particle Background - 装饰粒子
   ======================================== */
.particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255,255,255,0.3);
  border-radius: 50%;
  animation: float 4s ease-in-out infinite;
}

/* ========================================
   Gradient Text - 渐变文字
   ======================================== */
.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
}

/* ========================================
   Hover Lift Effect - 悬浮提升效果
   ======================================== */
.hover-lift {
  transition: var(--transition);
}

.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

/* ========================================
   Responsive Helpers
   ======================================== */
@media (max-width: 767px) {
  .hide-mobile {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .hide-desktop {
    display: none !important;
  }
}

/* ========================================
   Selection & Scrollbar - 自定义选中与滚动条
   ======================================== */
::selection {
  background: rgba(26, 95, 180, 0.2);
  color: var(--accent);
}

/* 自定义滚动条（Webkit） */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg2);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--accent), var(--accent2));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ========================================
   Table Scroll Hint
   ======================================== */
.table-scroll-hint {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  position: relative;
}

/* ========================================
   Mobile Optimizations - 全面移动端适配
   ======================================== */
@media (max-width: 767px) {
  /* 全局 */
  .container {
    padding: 0 16px;
  }

  /* Hero */
  .hero {
    min-height: 480px;
    max-height: 640px;
  }
  .hero-tag {
    font-size: 0.7rem;
    padding: 6px 14px;
    margin-bottom: 16px;
  }
  .hero-title {
    font-size: 1.7rem;
    margin-bottom: 12px;
  }
  .hero-desc {
    font-size: 0.88rem;
    line-height: 1.7;
    margin-bottom: 24px;
  }
  .hero-btns {
    flex-direction: column;
    gap: 10px;
  }
  .hero-btns .btn {
    width: 100%;
    padding: 13px 24px;
    font-size: 0.9rem;
  }
  .hero-dots {
    bottom: 20px;
    gap: 8px;
  }
  .hero-dot {
    width: 10px;
    height: 10px;
  }
  .hero-arrows {
    display: none;
  }

  /* Section */
  .section {
    padding: 48px 0;
  }
  .section-header {
    margin-bottom: 40px;
  }
  .section-tag {
    font-size: 0.7rem;
    padding: 5px 14px;
    margin-bottom: 12px;
  }
  .section-title {
    font-size: 1.5rem;
    margin-bottom: 12px;
  }
  .section-desc {
    font-size: 0.9rem;
    line-height: 1.65;
  }

  /* Feature items */
  .feature-item {
    padding: 28px 20px;
  }
  .feature-img {
    height: 140px;
    margin-bottom: 14px;
  }
  .feature-icon {
    width: 56px;
    height: 56px;
    font-size: 1.6rem;
    margin-bottom: 16px;
  }
  .feature-title {
    font-size: 1.1rem;
    margin-bottom: 8px;
  }
  .feature-desc {
    font-size: 0.85rem;
  }

  /* Stats */
  .stats-grid {
    gap: 12px;
  }
  .stat-item {
    padding: 24px 12px;
  }
  .stat-number {
    font-size: 2rem;
  }
  .stat-label {
    font-size: 0.78rem;
  }

  /* Page Banner */
  .page-banner {
    height: 260px;
    min-height: 260px;
  }
  .page-banner-title {
    font-size: 1.6rem;
  }
  .page-banner-desc {
    font-size: 0.85rem;
  }
  .page-banner-content::after {
    width: 40px;
    margin-top: 14px;
  }

  /* Two column */
  .two-col {
    gap: 28px;
  }
  .two-col-content h3 {
    font-size: 1.3rem;
  }
  .two-col-content p {
    font-size: 0.88rem;
  }
  .two-col-content ul {
    font-size: 0.85rem;
  }
  .two-col-content .btn {
    width: 100%;
    padding: 12px 24px;
  }

  /* Product cards */
  .product-card-img {
    height: 200px;
  }
  .product-card-body {
    padding: 18px;
  }
  .product-card-title {
    font-size: 1rem;
  }
  .product-card-desc {
    font-size: 0.82rem;
  }

  /* Gallery */
  .gallery-item {
    aspect-ratio: 16/10;
  }

  /* CTA */
  .cta-section h2 {
    font-size: 1.5rem !important;
  }
  .cta-section p {
    font-size: 0.9rem !important;
  }
  .cta-section .btn {
    width: 100%;
    padding: 13px 24px;
  }

  /* Timeline */
  .timeline-item {
    padding-left: 44px;
    padding-bottom: 28px;
  }
  .timeline::before {
    left: 14px;
  }
  .timeline-dot {
    left: 5px;
    width: 16px;
    height: 16px;
  }
  .timeline-year {
    font-size: 0.78rem;
  }
  .timeline-title {
    font-size: 1rem;
  }
  .timeline-desc {
    font-size: 0.82rem;
  }

  /* Cert items */
  .cert-item {
    padding: 24px 16px;
  }
  .cert-icon {
    width: 56px;
    height: 56px;
    font-size: 1.3rem;
  }

  /* Form */
  .form-input,
  .form-textarea {
    padding: 12px 14px;
    font-size: 16px; /* 防止iOS自动缩放 */
  }

  /* Footer */
  .footer {
    padding: 48px 0 20px;
  }
  .footer-grid {
    gap: 32px;
    margin-bottom: 32px;
  }
  .footer-brand .logo img {
    height: 48px;
  }
  .footer-title {
    margin-bottom: 14px;
    padding-bottom: 10px;
  }
  .footer-links li {
    margin-bottom: 8px;
  }

  /* Scroll top */
  .scroll-top {
    width: 40px;
    height: 40px;
    bottom: 16px;
    right: 16px;
    font-size: 1rem;
  }

  /* Table scroll hint */
  table {
    font-size: 0.82rem;
  }
  table th,
  table td {
    padding: 10px 12px !important;
  }

  /* Lightbox */
  .lightbox {
    padding: 12px;
  }
  .lightbox-close {
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
  }

  /* Cards general */
  .card {
    border-radius: var(--radius-lg);
  }

  /* Video wrapper */
  .video-play-btn {
    width: 56px;
    height: 56px;
    font-size: 1.2rem;
  }

  /* 减少动画强度以提升低端机性能 */
  .section-decor {
    display: none;
  }

  /* 表格横向滚动提示 */
  .table-scroll-hint::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 40px;
    background: linear-gradient(to right, transparent, rgba(0,0,0,0.06));
    pointer-events: none;
    opacity: 0.6;
  }
}

/* 小屏手机额外优化 (iPhone SE等) */
@media (max-width: 375px) {
  .hero-title {
    font-size: 1.5rem;
  }
  .section-title {
    font-size: 1.35rem;
  }
  .stat-number {
    font-size: 1.7rem;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .stat-item {
    padding: 18px 8px;
  }
  .feature-item {
    padding: 22px 14px;
  }
  .product-card-img {
    height: 180px;
  }
}

/* 平板端微调 */
@media (min-width: 768px) and (max-width: 1023px) {
  .section {
    padding: 80px 0;
  }
  .hero-title {
    font-size: 2.8rem;
  }
  .section-title {
    font-size: 2.2rem;
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 横屏手机优化 */
@media (max-width: 767px) and (orientation: landscape) {
  .hero {
    min-height: 360px;
    max-height: 420px;
  }
  .hero-title {
    font-size: 1.5rem;
  }
  .hero-desc {
    font-size: 0.85rem;
    margin-bottom: 16px;
  }
  .page-banner {
    height: 220px;
  }
}