/* ================================================
   国文汇通 · 科技文化融合设计系统 v1.0
   核心理念：科技为骨，文化为魂
   设计原则：现代极简 + 东方美学 + 动态交互
   ================================================ */

/* 导入字体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700;900&family=Noto+Sans+SC:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

/* ==================== CSS变量系统 ==================== */
:root {
  /* ===== 官方色彩体系 (文化底蕴) ===== */
  --cinnabar: #B22222;        /* 朱砂红 - 权威、印章 */
  --cinnabar-light: #D93D3D;
  --cinnabar-dark: #8B1A1A;
  
  --deep-ink: #121A24;        /* 深青黑 - 典籍、墨色 */
  --ink: #1A1F24;
  --ink-light: #2C333A;
  
  --gold: #D4AF37;            /* 鎏金色 - 宫廷、贵重 */
  --gold-light: #E6C766;
  --gold-dark: #B8941F;
  
  --celadon: #2A5C54;         /* 青釉绿 - 青铜、古器 */
  --celadon-light: #3A7060;
  --celadon-dark: #1F453F;
  
  --paper: #F5F1E8;           /* 宣纸米 - 背景、留白 */
  --paper-warm: #FAF7F2;
  --paper-dark: #EBE6DE;
  
  --bronze: #1A2026;          /* 青铜肌理 - 金属质感 */
  
  /* ===== 科技色彩体系 (现代感) ===== */
  --tech-blue: #0EA5E9;       /* 科技蓝 - 区块链、数据流 */
  --tech-blue-light: #38BDF8;
  --tech-blue-dark: #0284C7;
  
  --tech-purple: #8B5CF6;     /* 科技紫 - 数字、虚拟 */
  --tech-purple-light: #A78BFA;
  --tech-purple-dark: #7C3AED;
  
  --tech-cyan: #06B6D4;       /* 科技青 - 信息、连接 */
  --tech-cyan-light: #22D3EE;
  --tech-cyan-dark: #0891B2;
  
  --neon-glow: #00FF9D;       /* 霓虹绿 - 动态、活跃 */
  
  /* ===== 功能色彩 ===== */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;
  
  /* ===== 字体系统 ===== */
  --font-serif: 'Noto Serif SC', serif;      /* 衬线 - 标题、文化内容 */
  --font-sans: 'Noto Sans SC', sans-serif;   /* 无衬线 - 正文、UI */
  --font-mono: 'JetBrains Mono', monospace;  /* 等宽 - 代码、数据 */
  
  /* ===== 间距系统 ===== */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* ===== 圆角系统 ===== */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* ===== 阴影系统 ===== */
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.25);
  
  /* ===== 玻璃态效果 ===== */
  --glass-bg: rgba(245, 241, 232, 0.85);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.1);
  --glass-blur: blur(20px);
  
  /* ===== 渐变系统 ===== */
  --gradient-gold: linear-gradient(135deg, var(--gold), var(--gold-light));
  --gradient-cinnabar: linear-gradient(135deg, var(--cinnabar), var(--cinnabar-light));
  --gradient-tech: linear-gradient(135deg, var(--tech-blue), var(--tech-purple));
  --gradient-paper: linear-gradient(135deg, var(--paper), var(--paper-warm));
  
  /* ===== 动画时长 ===== */
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-very-slow: 1000ms;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(210, 34, 34, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(42, 92, 84, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ==================== 排版系统 ==================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
  color: var(--deep-ink);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.5rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
}

p {
  margin-bottom: var(--space-4);
  color: var(--ink-light);
}

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

a:hover {
  color: var(--cinnabar-light);
}

/* ==================== 实用类 ==================== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.section {
  padding: var(--space-24) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cinnabar);
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  background: rgba(178, 34, 34, 0.1);
  border-radius: var(--radius-full);
}

.section-title {
  font-size: 3rem;
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--deep-ink) 0%, var(--cinnabar) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto;
  color: var(--ink-light);
}

/* ==================== 导航栏 ==================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: all var(--duration-normal) ease;
}

.nav.scrolled {
  box-shadow: var(--glass-shadow);
  background: rgba(245, 241, 232, 0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--space-8);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.logo-mark {
  width: 48px;
  height: 48px;
  background: var(--gradient-cinnabar);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.logo-mark::before {
  content: '';
  position: absolute;
  inset: 1px;
  background: var(--paper);
  border-radius: calc(var(--radius-md) - 1px);
}

.logo-mark span {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--cinnabar);
  position: relative;
  z-index: 1;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--deep-ink);
}

.nav-tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  background: rgba(42, 92, 84, 0.1);
  color: var(--celadon);
  border-radius: var(--radius-full);
  border: 1px solid rgba(42, 92, 84, 0.2);
}

.nav-links {
  display: flex;
  gap: var(--space-8);
}

.nav-link {
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding: var(--space-2) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-cinnabar);
  transition: width var(--duration-normal) ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-ctas {
  display: flex;
  gap: var(--space-4);
}

/* ==================== 按钮系统 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) ease;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: inherit;
  filter: brightness(1.2);
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

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

.btn-primary {
  background: var(--gradient-cinnabar);
  color: white;
  box-shadow: 0 4px 12px rgba(178, 34, 34, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(178, 34, 34, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--cinnabar);
  border: 2px solid var(--cinnabar);
}

.btn-outline:hover {
  background: rgba(178, 34, 34, 0.1);
  transform: translateY(-2px);
}

.btn-tech {
  background: var(--gradient-tech);
  color: white;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.btn-tech:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.4);
}

.btn-gold {
  background: var(--gradient-gold);
  color: var(--deep-ink);
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(212, 175, 55, 0.4);
}

/* ==================== 卡片系统 ==================== */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  transition: all var(--duration-normal) ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-glow {
  position: relative;
}

.card-glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: var(--gradient-tech);
  border-radius: calc(var(--radius-xl) + 1px);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

.card-glow:hover::before {
  opacity: 0.5;
}

/* ==================== 印章元素 ==================== */
.seal {
  width: 64px;
  height: 64px;
  background: var(--gradient-cinnabar);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.75rem;
  color: white;
}

.seal::before {
  content: '';
  position: absolute;
  inset: 2px;
  border: 2px solid white;
  border-radius: calc(var(--radius-md) - 1px);
  opacity: 0.3;
}

/* ==================== 数据可视化元素 ==================== */
.data-pulse {
  position: relative;
}

.data-pulse::after {
  content: '';
  position: absolute;
  inset: -4px;
  border: 2px solid var(--tech-cyan);
  border-radius: var(--radius-lg);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.1);
  }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .nav-links {
    display: none;
  }
  
  .section {
    padding: var(--space-16) 0;
  }
}

/* ==================== 工具类 ==================== */
.text-gradient {
  background: var(--gradient-cinnabar);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-tech {
  background: var(--gradient-tech);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* ==================== 初始部分结束 ==================== */
/* ==================== 新版Hero区样式 ==================== */
.hero {
  padding: var(--space-32) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(178, 34, 34, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(14, 165, 233, 0.08) 0%, transparent 50%);
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-24);
  }
}

.hero-content {
  padding-right: var(--space-12);
}

.hero-title {
  font-size: 4rem;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.hero-title span {
  display: block;
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--ink-light);
  margin-bottom: var(--space-8);
  max-width: 90%;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.feature-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  backdrop-filter: var(--glass-blur);
}

.feature-chip-icon {
  font-size: 1rem;
}

.hero-ctas {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.btn-arrow, .btn-icon {
  margin-left: var(--space-2);
  transition: transform var(--duration-fast) ease;
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

.btn:hover .btn-icon {
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--glass-border);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--cinnabar);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-gray);
}

/* 右侧可视化区域 */
.hero-visual {
  position: relative;
}

.visual-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
  gap: var(--space-6);
  position: relative;
}

.seal-large {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  width: 120px;
  height: 120px;
  background: var(--gradient-cinnabar);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin: 0 auto;
}

.seal-large::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: calc(var(--radius-xl) - 4px);
}

.seal-inner {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 900;
  color: white;
  position: relative;
  z-index: 1;
}

.seal-glow {
  position: absolute;
  inset: -10px;
  background: var(--gradient-cinnabar);
  border-radius: var(--radius-xl);
  filter: blur(20px);
  opacity: 0.5;
  z-index: -1;
  animation: pulse-glow 2s infinite alternate;
}

@keyframes pulse-glow {
  0% { opacity: 0.3; }
  100% { opacity: 0.7; }
}

.data-card {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
}

.data-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.data-card-icon {
  font-size: 1.5rem;
}

.data-card-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.data-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--glass-border);
}

.data-row:last-child {
  border-bottom: none;
}

.data-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--tech-blue);
}

.asset-card {
  grid-column: span 1;
  grid-row: 2 / 3;
}

.asset-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.asset-info h4 {
  margin-bottom: var(--space-1);
}

.asset-info p {
  font-size: 0.875rem;
  color: var(--text-gray);
  margin: 0;
}

.asset-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.asset-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-gray);
}

.stat-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--cinnabar);
}

/* 响应式调整 */
@media (max-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.125rem;
  }
  
  .visual-container {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  
  .seal-large {
    width: 100px;
    height: 100px;
    margin-bottom: var(--space-8);
  }
  
  .seal-inner {
    font-size: 2.5rem;
  }
}

/* ==================== 信任背书区样式 ==================== */
.trust-section {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-warm) 100%);
  position: relative;
  overflow: hidden;
}

.trust-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(42, 92, 84, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(212, 175, 55, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.trust-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--duration-normal) ease;
  position: relative;
  overflow: hidden;
}

.trust-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    rgba(178, 34, 34, 0.05) 0%, 
    rgba(14, 165, 233, 0.05) 100%);
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

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

.trust-card:hover {
  transform: translateY(-8px);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.1),
    0 0 0 1px rgba(178, 34, 34, 0.1);
}

.trust-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.trust-icon {
  position: relative;
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

.icon-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-cinnabar);
  border-radius: var(--radius-lg);
  opacity: 0.1;
}

.icon-symbol {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  z-index: 1;
}

.trust-card-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--deep-ink);
  margin: 0;
}

.trust-card-body {
  margin-bottom: var(--space-6);
}

.trust-card-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-light);
  margin: 0;
}

.trust-card-footer {
  border-top: 1px solid var(--glass-border);
  padding-top: var(--space-4);
}

.trust-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: rgba(42, 92, 84, 0.1);
  border: 1px solid rgba(42, 92, 84, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--celadon);
}

.badge-text {
  letter-spacing: 0.05em;
}

/* 区块链可视化 */
.trust-visual {
  margin-top: var(--space-16);
  text-align: center;
}

.chain-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.chain-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  min-width: 100px;
  transition: all var(--duration-normal) ease;
}

.chain-node:hover {
  transform: translateY(-4px);
  background: rgba(14, 165, 233, 0.1);
  border-color: var(--tech-blue);
}

.node-icon {
  font-size: 2rem;
}

.node-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink);
}

.chain-line {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--cinnabar), var(--tech-blue));
  position: relative;
}

.chain-line::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 0;
  width: 8px;
  height: 8px;
  background: var(--tech-blue);
  border-radius: 50%;
  animation: slide 2s infinite linear;
}

@keyframes slide {
  0% { left: 0; }
  100% { left: 32px; }
}

.visual-label {
  font-size: 0.875rem;
  color: var(--text-gray);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .trust-grid {
    grid-template-columns: 1fr;
  }
  
  .chain-visual {
    flex-wrap: wrap;
    gap: var(--space-4);
  }
  
  .chain-line {
    width: 2px;
    height: 20px;
  }
  
  .chain-line::before {
    top: 0;
    left: -3px;
    animation: slide-vertical 2s infinite linear;
  }
}

@keyframes slide-vertical {
  0% { top: 0; }
  100% { top: 12px; }
}

/* ==================== 产品体系区样式 ==================== */
.products-section {
  background: var(--paper-warm);
  position: relative;
  overflow: hidden;
}

.products-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 50% 30%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(14, 165, 233, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.products-visual {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: center;
  margin-bottom: var(--space-16);
  position: relative;
}

@media (max-width: 1024px) {
  .products-visual {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr 1fr;
    gap: var(--space-12);
  }
}

/* 区块链核心 */
.blockchain-core {
  grid-column: 2;
  position: relative;
  z-index: 2;
}

@media (max-width: 1024px) {
  .blockchain-core {
    grid-column: 1;
    grid-row: 1;
  }
}

.core-circle {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto;
}

.core-inner {
  position: absolute;
  inset: 20px;
  background: var(--gradient-tech);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 2;
}

.core-text {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  line-height: 1.3;
}

.core-ring {
  position: absolute;
  inset: 0;
  border: 3px solid rgba(14, 165, 233, 0.3);
  border-radius: 50%;
  animation: rotate 20s linear infinite;
}

.core-glow {
  position: absolute;
  inset: -20px;
  background: var(--gradient-tech);
  border-radius: 50%;
  filter: blur(30px);
  opacity: 0.3;
  z-index: 1;
}

@keyframes rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 连接线 */
.connection {
  position: absolute;
  top: 50%;
  width: 100px;
}

.connection-left {
  right: 100%;
}

.connection-right {
  left: 100%;
}

@media (max-width: 1024px) {
  .connection {
    display: none;
  }
}

.connection-line {
  position: absolute;
  top: 50%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--tech-blue));
}

.connection-left .connection-line {
  background: linear-gradient(90deg, var(--tech-blue), transparent);
  right: 0;
}

.connection-dot {
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  background: var(--tech-blue);
  border-radius: 50%;
  transform: translateY(-50%);
  animation: pulse 2s infinite;
}

.connection-left .connection-dot {
  right: 0;
}

.connection-right .connection-dot {
  left: 0;
}

/* 产品卡片 */
.product-card {
  height: 100%;
}

.product-card-left {
  grid-column: 1;
}

.product-card-right {
  grid-column: 3;
}

@media (max-width: 1024px) {
  .product-card-left {
    grid-column: 1;
    grid-row: 2;
  }
  
  .product-card-right {
    grid-column: 1;
    grid-row: 3;
  }
}

.product-card-inner {
  height: 100%;
  padding: var(--space-8);
  transition: all var(--duration-normal) ease;
}

.product-card-inner:hover {
  transform: translateY(-8px);
  box-shadow: 
    0 25px 50px rgba(0, 0, 0, 0.15),
    0 0 0 1px rgba(178, 34, 34, 0.1);
}

.product-header {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.product-seal {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
}

.product-title-wrap {
  flex: 1;
}

.product-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--deep-ink);
  margin: 0 0 var(--space-1) 0;
}

.product-subtitle {
  font-size: 1rem;
  color: var(--text-gray);
  margin: 0;
}

.product-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.product-stat {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
}

.stat-icon {
  font-size: 1.25rem;
}

.stat-info {
  flex: 1;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cinnabar);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-gray);
}

.product-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

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

.feature-dot {
  width: 6px;
  height: 6px;
  background: var(--cinnabar);
  border-radius: 50%;
  margin-top: 0.5em;
  flex-shrink: 0;
}

.product-data {
  margin-top: var(--space-6);
}

.data-label {
  font-size: 0.875rem;
  color: var(--text-gray);
  margin-bottom: var(--space-2);
}

.data-bar {
  position: relative;
  height: 8px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.data-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--gradient-cinnabar);
  border-radius: var(--radius-full);
  transition: width 1s ease;
}

.data-text {
  position: absolute;
  top: 50%;
  right: var(--space-2);
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* 生态闭环流程 */
.ecosystem-flow {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  margin-top: var(--space-16);
  padding: var(--space-8);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
}

@media (max-width: 768px) {
  .ecosystem-flow {
    flex-wrap: wrap;
    gap: var(--space-4);
  }
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  min-width: 100px;
}

.step-icon {
  font-size: 2rem;
  margin-bottom: var(--space-2);
}

.step-title {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--deep-ink);
}

.step-desc {
  font-size: 0.875rem;
  color: var(--text-gray);
  text-align: center;
}

.flow-arrow {
  font-size: 1.5rem;
  color: var(--tech-blue);
  opacity: 0.7;
}

@media (max-width: 768px) {
  .flow-arrow {
    transform: rotate(90deg);
  }
}

/* ==================== 案例展示区样式 ==================== */
.cases-section {
  background: var(--paper);
  position: relative;
}

.cases-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(178, 34, 34, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212, 175, 55, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

/* 时间轴容器 */
.timeline-container {
  position: relative;
  margin: var(--space-16) 0;
  padding-left: 80px;
}

@media (max-width: 768px) {
  .timeline-container {
    padding-left: 40px;
  }
}

.timeline-line {
  position: absolute;
  left: 40px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, 
    var(--cinnabar) 0%, 
    var(--tech-blue) 50%, 
    var(--gold) 100%);
}

@media (max-width: 768px) {
  .timeline-line {
    left: 20px;
  }
}

.timeline-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 30%;
  background: linear-gradient(to bottom, 
    rgba(255, 255, 255, 0.8) 0%, 
    transparent 100%);
  animation: progress 3s ease-in-out infinite alternate;
}

@keyframes progress {
  0% { height: 30%; }
  100% { height: 70%; }
}

/* 时间轴项目 */
.timeline-item {
  position: relative;
  margin-bottom: var(--space-16);
}

.timeline-marker {
  position: absolute;
  left: -80px;
  top: 0;
  width: 80px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-2);
}

@media (max-width: 768px) {
  .timeline-marker {
    left: -40px;
    width: 40px;
  }
}

.marker-dot {
  width: 16px;
  height: 16px;
  background: var(--gradient-cinnabar);
  border: 3px solid var(--paper);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(178, 34, 34, 0.2);
}

.marker-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-gray);
  white-space: nowrap;
}

/* 案例卡片 */
.case-card {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-8);
  padding: var(--space-6);
  transition: all var(--duration-normal) ease;
}

@media (max-width: 1024px) {
  .case-card {
    grid-template-columns: 1fr;
  }
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.15),
    0 0 0 1px rgba(178, 34, 34, 0.1);
}

.case-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) ease;
}

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

.case-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: var(--space-6);
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

.case-image:hover .case-image-overlay {
  opacity: 1;
}

.overlay-text {
  color: white;
  font-size: 0.875rem;
  font-weight: 500;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--celadon), var(--celadon-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: white;
}

/* 案例内容 */
.case-content {
  padding: var(--space-2);
}

.case-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.case-partner {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--cinnabar);
  font-size: 1.125rem;
}

.case-tag {
  font-size: 0.75rem;
  padding: var(--space-1) var(--space-3);
  background: rgba(42, 92, 84, 0.1);
  color: var(--celadon);
  border-radius: var(--radius-full);
  border: 1px solid rgba(42, 92, 84, 0.2);
}

.case-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--deep-ink);
  margin-bottom: var(--space-3);
}

.case-desc {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-light);
  margin-bottom: var(--space-6);
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.case-stat {
  text-align: center;
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-gray);
  margin-bottom: var(--space-1);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cinnabar);
}

/* 画廊导航 */
.gallery-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  margin: var(--space-12) 0;
}

.nav-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--ink);
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--duration-normal) ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-btn:hover {
  background: var(--cinnabar);
  color: white;
  transform: scale(1.1);
}

.nav-dots {
  display: flex;
  gap: var(--space-3);
}

.nav-dot {
  width: 10px;
  height: 10px;
  background: var(--glass-border);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--duration-normal) ease;
}

.nav-dot.active {
  background: var(--cinnabar);
  transform: scale(1.2);
}

.nav-dot:hover {
  background: var(--cinnabar-light);
}

/* 案例统计 */
.cases-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-16);
}

@media (max-width: 768px) {
  .cases-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-card {
  text-align: center;
  padding: var(--space-6);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  transition: all var(--duration-normal) ease;
}

.stat-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.9);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--cinnabar);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-gray);
}

/* ==================== 页脚信息区样式 ==================== */
.footer-section {
  background: var(--deep-ink);
  color: var(--text-white);
  position: relative;
  overflow: hidden;
}

/* 文化纹样边框 */
.footer-border-top,
.footer-border-bottom {
  position: relative;
  height: 20px;
  overflow: hidden;
}

.border-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(90deg, transparent 0%, transparent 50%, var(--gold) 50%, var(--gold) 100%),
    linear-gradient(90deg, var(--gold) 0%, var(--gold) 10%, transparent 10%, transparent 90%, var(--gold) 90%, var(--gold) 100%);
  background-size: 40px 20px, 100% 100%;
  background-repeat: repeat-x;
  opacity: 0.3;
}

.footer-border-bottom .border-pattern {
  transform: rotate(180deg);
}

.footer-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 30%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(178, 34, 34, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

/* 页脚内容 */
.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-16);
  padding: var(--space-16) 0;
}

@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
}

/* 品牌信息 */
.footer-brand {
  padding-right: var(--space-8);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.footer-logo .logo-mark {
  width: 56px;
  height: 56px;
  background: var(--gradient-cinnabar);
}

.footer-logo .logo-mark span {
  font-size: 1.5rem;
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.logo-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: white;
}

.logo-subtitle {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

.footer-description {
  font-size: 0.95rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-8);
}

.footer-cta .btn-gold {
  background: var(--gradient-gold);
  color: var(--deep-ink);
  font-weight: 600;
}

.footer-cta .btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(212, 175, 55, 0.4);
}

/* 链接列 */
.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.link-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-2);
  position: relative;
  padding-bottom: var(--space-2);
}

.link-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--gold);
}

.link-item {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all var(--duration-fast) ease;
  padding: var(--space-1) 0;
}

.link-item:hover {
  color: var(--gold);
  transform: translateX(4px);
}

/* 联系信息 */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

.contact-icon {
  font-size: 1rem;
  opacity: 0.8;
}

/* 备案信息 */
.footer-compliance {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-6) 0;
  margin: var(--space-8) 0;
}

.compliance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

@media (max-width: 1024px) {
  .compliance-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .compliance-grid {
    grid-template-columns: 1fr;
  }
}

.compliance-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: all var(--duration-fast) ease;
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
}

.compliance-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
}

.compliance-icon {
  font-size: 0.9rem;
  opacity: 0.7;
}

/* 版权信息 */
.footer-copyright {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 768px) {
  .footer-copyright {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

.copyright-text {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.copyright-divider {
  opacity: 0.3;
}

.copyright-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.copyright-links a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

.copyright-links a:hover {
  color: var(--gold);
}

.divider {
  opacity: 0.3;
}



/* 修复：disabled 链接样式 */
.nav-link.disabled,
.link-item.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
    text-decoration: none;
    color: #999 !important;
    background-color: rgba(136, 136, 136, 0.1);
    border-radius: 4px;
    padding: 2px 6px;
    font-style: italic;
    transition: all 0.2s ease;
}

.nav-link.disabled:hover,
.link-item.disabled:hover {
    background-color: rgba(136, 136, 136, 0.15);
    opacity: 0.7;
}

/* ==================== 移动端响应式增强修复（P2优化） ==================== */
/* 确保图片和嵌入内容不会溢出容器 */
@media (max-width: 768px) {
  img, video, iframe, embed, object {
    max-width: 100%;
    height: auto;
  }
  
  /* 表格水平滚动 */
  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  /* 长文本强制换行 */
  .text-long, p, li, td, th {
    word-wrap: break-word;
    overflow-wrap: break-word;
  }
  
  /* 触摸目标最小尺寸（WCAG 2.1 AA标准） */
  button, .btn, a[role="button"], input[type="submit"], input[type="button"] {
    min-height: 44px;
    min-width: 44px;
    padding: 12px 16px;
  }
  
  /* 修复导航栏在小屏幕上的显示 - 垂直堆叠布局 */
  .nav-inner {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
  }
  
  .nav-links {
    flex-direction: column;
    width: 100%;
    display: none;
    gap: var(--space-2);
    border-top: 1px solid rgba(255,255,255,0.1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding: var(--space-4) 0;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  
  .nav-expanded .nav-links {
    display: flex !important;
    opacity: 1;
    transform: translateY(0);
  }
  
  .nav-link {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.2s ease;
  }
  
  .nav-link:hover {
    background: rgba(255,255,255,0.05);
  }
  
  .nav-ctas {
    width: 100%;
    justify-content: center;
    margin-top: var(--space-2);
  }
  
  /* 汉堡菜单按钮（需要HTML中添加） */
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 1001;
  }
  
  .nav-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background: var(--text-primary);
    border-radius: 3px;
    transition: 0.3s;
  }
  
  /* 汉堡菜单展开状态 */
  .nav-expanded .nav-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  
  .nav-expanded .nav-toggle span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-expanded .nav-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }
  
  .nav-expanded .nav-toggle span {
    background: var(--cinnabar);
  }
  
  /* 移动端隐藏不必要的装饰元素 */
  .hero-ornament, .section-ornament, .flow-arrow {
    display: none;
  }
  
  /* 调整间距 */
  .section {
    padding: var(--space-8) 0;
  }
  
  /* 调整字体大小 */
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
  h3 { font-size: 1.5rem; }
  .hero-title { font-size: 2.5rem; }
}

/* 超小屏幕优化（≤375px） */
@media (max-width: 375px) {
  .container {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
  
  .btn {
    padding: 10px 14px;
    font-size: 0.9rem;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}

/* 返回链接样式 */
.back-link {
  margin-top: var(--space-4);
  margin-bottom: var(--space-6);
  padding: var(--space-3) var(--space-4);
  background: var(--gray-50);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--cinnabar);
}

.back-link a {
  color: var(--cinnabar);
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.back-link a:hover {
  text-decoration: underline;
}