/* ========================================
   璇玑智链 · 高级视觉系统
   ======================================== */

:root {
  /* 主色系 - 浅色科技蓝 */
  --primary-900: #e8f4fc;
  --primary-800: #d0e8f8;
  --primary-700: #b8dcf4;
  --primary-600: #2563eb;
  --primary-500: #3b82f6;
  --primary-400: #60a5fa;
  --primary-300: #93c5fd;
  
  /* 强调色 - 科技青 */
  --accent-500: #06b6d4;
  --accent-400: #22d3ee;
  --accent-300: #67e8f9;
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #06b6d4 50%, #8b5cf6 100%);
  --gradient-dark: linear-gradient(180deg, #e8f4fc 0%, #d0e8f8 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.4) 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(59,130,246,0.1) 0%, transparent 70%);
  
  /* 文字 - 浅色主题 */
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-dark: #0f172a;
  
  /* 表面 - 浅色主题 */
  --surface-dark: rgba(255, 255, 255, 0.9);
  --surface-glass: rgba(255, 255, 255, 0.6);
  --surface-glass-strong: rgba(255, 255, 255, 0.8);
  --surface-card: rgba(255, 255, 255, 0.7);
  
  /* 边框 */
  --border-glass: rgba(59, 130, 246, 0.2);
  --border-glow: rgba(59, 130, 246, 0.3);
  
  /* 阴影 - 浅色主题 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.2);
  --shadow-glow-accent: 0 0 40px rgba(6, 182, 212, 0.15);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  /* 动画 */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 0.2s;
  --duration-normal: 0.4s;
  --duration-slow: 0.8s;
}

/* ========================================
   基础重置与全局样式
   ======================================== */
   
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--primary-900);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 全局背景装饰 - 柔和渐变 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 25%, #f0fdfa 50%, #ecfeff 75%, #f8fafc 100%);
  pointer-events: none;
  z-index: -1;
}

/* 微妙的光斑装饰 */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle 600px at 10% 20%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
    radial-gradient(circle 400px at 90% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

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

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

/* ========================================
   容器与布局
   ======================================== */
   
.container {
  width: min(1200px, 100% - 3rem);
  margin-inline: auto;
}

/* ========================================
   头部导航 - 玻璃拟态
   ======================================== */
   
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.8) 100%);
  backdrop-filter: blur(12px);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 68px;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.logo:hover .logo-img {
  transform: scale(1.05);
}

/* 导航 */
.nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav a {
  position: relative;
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) ease;
}

.nav a::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: var(--gradient-glass);
  opacity: 0;
  transition: opacity var(--duration-fast) ease;
}

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

.nav a:hover::before {
  opacity: 1;
}

.nav a.active {
  color: var(--text-primary);
  background: var(--surface-glass-strong);
}

.nav-cta {
  position: relative;
  padding: 0.6rem 1.4rem !important;
  background: var(--gradient-primary) !important;
  color: #fff !important;
  font-weight: 600 !important;
  box-shadow: var(--shadow-glow), var(--shadow-sm);
  overflow: hidden;
}

.nav-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
  opacity: 0 !important;
  transition: opacity var(--duration-fast) ease;
}

.nav-cta:hover::before {
  opacity: 1 !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow), var(--shadow-md);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.menu-toggle:hover {
  background: var(--surface-glass-strong);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) ease;
}

/* ========================================
   主内容区域
   ======================================== */
   
main {
  padding-top: 80px;
}

/* ========================================
   Hero 区域 - 高级版
   ======================================== */
   
.hero {
  position: relative;
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  padding: 4rem 0;
  overflow: hidden;
}

/* Hero 背景光效 */
.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 60%);
  animation: float 20s ease-in-out infinite;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
  animation: float 25s ease-in-out infinite reverse;
  pointer-events: none;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

/* Hero 左侧内容 */
.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-500);
}

.hero-eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-content h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  line-height: 1.7;
}

/* Hero 按钮组 */
.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.btn.primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-glow), var(--shadow-sm);
}

.btn.primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--duration-fast) ease;
}

.btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow), var(--shadow-md);
}

.btn.primary:hover::before {
  opacity: 1;
}

.btn.ghost {
  background: var(--surface-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
}

.btn.ghost:hover {
  background: var(--surface-glass-strong);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.btn.full-width {
  width: 100%;
}

/* Hero 标签 */
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.hero-tags span {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
  transition: all var(--duration-fast) ease;
}

.hero-tags span:hover {
  background: var(--surface-glass-strong);
  border-color: var(--border-glow);
  color: var(--text-primary);
}

/* Hero 右侧视觉 */
.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* 3D 卡片容器 */
.hero-panel {
  position: relative;
  padding: 2rem;
  background: var(--surface-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.hero-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.3), transparent);
}

.hero-panel::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-panel:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--border-glow);
}

.hero-panel-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.hero-panel-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--accent-500);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-full);
}

.hero-panel-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent-400);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-panel-body {
  position: relative;
  z-index: 1;
}

.hero-panel-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.hero-panel-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.hero-panel-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.hero-panel-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background: var(--gradient-primary);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.5);
}

/* 统计卡片 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.stat-card {
  position: relative;
  padding: 1.25rem;
  background: var(--surface-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
}

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

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ========================================
   通用 Section 样式
   ======================================== */
   
.section {
  position: relative;
  padding: 5rem 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.5);
}

.section-alt::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.15), transparent);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary-600);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 子页面 Hero */
.subpage-hero {
  padding: 6rem 0 3rem;
  text-align: center;
}

.subpage-hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.subpage-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.subpage-hero .hero-subtitle {
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   网格系统
   ======================================== */
   
.grid {
  display: grid;
  gap: 1.5rem;
}

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

.advantages-grid {
  grid-template-columns: repeat(4, 1fr);
}

/* ========================================
   卡片组件 - 玻璃拟态
   ======================================== */
   
.card {
  position: relative;
  padding: 1.75rem;
  background: var(--surface-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.2), transparent);
}

.card::after {
  content: "";
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 40%);
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md), 0 0 40px rgba(59, 130, 246, 0.1);
}

.card:hover::after {
  opacity: 1;
}

.card h3 {
  position: relative;
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.card p {
  position: relative;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.card ul {
  position: relative;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card ul li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--accent-400);
  border-radius: 50%;
}

/* 可点击卡片 */
.card[data-popup] {
  cursor: pointer;
}

.card[data-popup]::after {
  content: "点击查看详情";
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  font-size: 0.75rem;
  color: var(--accent-400);
  opacity: 0;
  transform: translateY(4px);
  transition: all var(--duration-fast) ease;
}

.card[data-popup]:hover::after {
  opacity: 1;
  transform: translateY(0);
}

/* Solution Card */
.solution-card .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.solution-card .chips span {
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) ease;
}

.solution-card:hover .chips span {
  border-color: var(--border-glow);
}

/* Small Card */
.small-card {
  padding: 1.5rem;
}

.small-card h3 {
  font-size: 1rem;
}

.small-card p {
  font-size: 0.88rem;
  margin-bottom: 0;
}

/* ========================================
   联系页面
   ======================================== */
   
.contact-section {
  padding-bottom: 5rem;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contact-content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact-content > p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-info {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-info li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact-info li span {
  color: var(--text-primary);
  font-weight: 500;
}

.contact-info a {
  color: var(--accent-400);
  font-weight: 600;
  transition: color var(--duration-fast) ease;
}

.contact-info a:hover {
  color: var(--accent-300);
  text-decoration: underline;
}

/* 表单 */
.contact-form {
  padding: 2rem;
  background: var(--surface-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-field input,
.form-field textarea {
  padding: 0.75rem 1rem;
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--duration-fast) ease;
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--text-muted);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
  background: var(--surface-glass-strong);
}

.form-tip {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========================================
   弹窗组件
   ======================================== */
   
.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.popup-overlay.active {
  opacity: 1;
  visibility: visible;
}

.popup-content {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: min(600px, 90%);
  max-height: 80vh;
  padding: 2.5rem;
  background: var(--surface-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(30px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  overflow-y: auto;
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.popup-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.popup-overlay.active + .popup-content,
.popup-content.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.popup-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-muted);
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.popup-close:hover {
  color: var(--text-primary);
  background: var(--surface-glass-strong);
  border-color: var(--border-glow);
}

.popup-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-right: 3rem;
}

.popup-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.popup-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.popup-content ul li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.popup-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background: var(--gradient-primary);
  border-radius: 50%;
}

/* ========================================
   页脚
   ======================================== */
   
.site-footer {
  position: relative;
  padding: 3rem 0;
  background: linear-gradient(180deg, transparent 0%, rgba(59, 130, 246, 0.05) 100%);
  border-top: 1px solid var(--border-glass);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-logo .logo-img {
  height: 56px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-right {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========================================
   页面加载入场动画
   ======================================== */

/* 初始状态 - 页面加载前元素不可见 */
/* 使用 animation 确保即使 JS 失败也能显示 */
.page-enter,
.page-enter-left,
.page-enter-right,
.page-enter-scale,
.page-enter-blur,
.page-enter-down {
  animation: autoReveal 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
  animation-delay: var(--stagger-delay, 0s);
  will-change: transform, opacity;
}

.page-enter {
  opacity: 0;
  transform: translateY(24px);
}

.page-enter-left {
  opacity: 0;
  transform: translateX(-30px);
}

.page-enter-right {
  opacity: 0;
  transform: translateX(30px);
}

.page-enter-scale {
  opacity: 0;
  transform: scale(0.92);
}

.page-enter-blur {
  opacity: 0;
  transform: translateY(16px);
  filter: blur(4px);
}

.page-enter-down {
  opacity: 0;
  transform: translateY(-20px);
}

/* 流畅的显示动画 */
@keyframes autoReveal {
  to {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1);
    filter: blur(0);
  }
}

/* 动画激活状态 - 保留用于 JS 控制（可选） */
.page-enter.animate,
.page-enter-left.animate,
.page-enter-right.animate,
.page-enter-scale.animate,
.page-enter-blur.animate,
.page-enter-down.animate {
  animation: none;
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
  filter: blur(0);
}

/* 阶梯延迟 - 更紧凑的时序让动画更流畅 */
.stagger-1 { --stagger-delay: 0s; animation-delay: 0s; }
.stagger-2 { --stagger-delay: 0.03s; animation-delay: 0.03s; }
.stagger-3 { --stagger-delay: 0.06s; animation-delay: 0.06s; }
.stagger-4 { --stagger-delay: 0.09s; animation-delay: 0.09s; }
.stagger-5 { --stagger-delay: 0.12s; animation-delay: 0.12s; }
.stagger-6 { --stagger-delay: 0.15s; animation-delay: 0.15s; }
.stagger-7 { --stagger-delay: 0.18s; animation-delay: 0.18s; }
.stagger-8 { --stagger-delay: 0.21s; animation-delay: 0.21s; }
.stagger-9 { --stagger-delay: 0.24s; animation-delay: 0.24s; }
.stagger-10 { --stagger-delay: 0.27s; animation-delay: 0.27s; }
.stagger-11 { --stagger-delay: 0.3s; animation-delay: 0.3s; }
.stagger-12 { --stagger-delay: 0.33s; animation-delay: 0.33s; }
.stagger-13 { --stagger-delay: 0.36s; animation-delay: 0.36s; }
.stagger-14 { --stagger-delay: 0.39s; animation-delay: 0.39s; }
.stagger-15 { --stagger-delay: 0.42s; animation-delay: 0.42s; }
.stagger-16 { --stagger-delay: 0.45s; animation-delay: 0.45s; }
.stagger-17 { --stagger-delay: 0.48s; animation-delay: 0.48s; }
.stagger-18 { --stagger-delay: 0.51s; animation-delay: 0.51s; }
.stagger-19 { --stagger-delay: 0.54s; animation-delay: 0.54s; }
.stagger-20 { --stagger-delay: 0.57s; animation-delay: 0.57s; }

/* 导航栏滑入 - 保留兼容 */
.header-enter {
  opacity: 0;
  transform: translateY(-100%);
}

.header-enter.animate {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.6s var(--ease-out-expo);
}

/* ========================================
   滚动动画（保留）
   ======================================== */
   
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--duration-slow) var(--ease-out-expo);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: all var(--duration-slow) var(--ease-out-expo);
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: all var(--duration-slow) var(--ease-out-expo);
}

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

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: all var(--duration-slow) var(--ease-out-expo);
}

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

/* 延迟动画 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ========================================
   响应式设计
   ======================================== */
   
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .product-grid,
  .solutions-grid,
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    width: min(100% - 2rem, 100%);
  }
  
  .nav {
    position: fixed;
    top: 70px;
    left: 1rem;
    right: 1rem;
    flex-direction: column;
    padding: 1.5rem;
    background: var(--surface-dark);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--duration-normal) var(--ease-out-expo);
  }
  
  .nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav a {
    width: 100%;
    text-align: center;
    padding: 0.75rem;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero {
    min-height: auto;
    padding: 3rem 0;
  }
  
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
  }
  
  .product-grid,
  .solutions-grid,
  .advantages-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .section {
    padding: 3rem 0;
  }
  
  .subpage-hero {
    padding: 4rem 0 2rem;
  }
}

@media (max-width: 480px) {
  .hero-panel {
    padding: 1.5rem;
  }
  
  .card {
    padding: 1.25rem;
  }
  
  .contact-form {
    padding: 1.5rem;
  }
  
  .popup-content {
    padding: 1.5rem;
  }
}