```css
/* ====== 青苹果乐园影院 专属样式 ====== */
/* 风格：现代影视 + 青苹果清新 + 轻拟物渐变 */
/* 支持暗色模式、响应式、动画 */

/* ====== 设计变量 & 主题 ====== */
:root {
  /* 主色系 - 青苹果绿 + 海洋蓝 */
  --brand-primary: #2E8B57;
  --brand-primary-dark: #1E6B3E;
  --brand-accent: #3CB371;
  --brand-accent-light: #66CDAA;
  --brand-secondary: #1F4E79;
  --brand-secondary-light: #2D6A9F;
  --brand-gradient: linear-gradient(135deg, #2E8B57, #1F4E79);
  --brand-gradient-light: linear-gradient(135deg, #3CB371, #2D6A9F);
  
  /* 背景 & 卡片 */
  --bg-light: #F0F7F4;
  --bg-card: #FFFFFF;
  --bg-deep: #0F2A1E;
  --bg-footer: #0A1F16;
  --bg-glass: rgba(255, 255, 255, 0.65);
  --bg-glass-dark: rgba(15, 42, 30, 0.65);
  
  /* 文本 */
  --text-primary: #1F2A24;
  --text-secondary: #3A4A42;
  --text-heading: #0F2419;
  --text-link: #1E6B3E;
  --text-footer: #B0C4B8;
  --text-on-brand: #FFFFFF;
  
  /* 边框 & 阴影 */
  --border-light: #D1E4D8;
  --border-medium: #A8C8B2;
  --shadow-sm: 0 4px 15px rgba(46, 139, 87, 0.08);
  --shadow-hover: 0 12px 28px rgba(46, 139, 87, 0.18);
  --shadow-glass: 0 8px 32px rgba(31, 78, 57, 0.12);
  
  /* 圆角 & 尺寸 */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --max-width: 1280px;
  --nav-height: 72px;
  
  /* 动效 */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 暗色模式变量 */
[data-theme="dark"] {
  --bg-light: #0D1B14;
  --bg-card: #16281F;
  --bg-deep: #060F0A;
  --bg-footer: #050C08;
  --bg-glass: rgba(22, 40, 31, 0.7);
  --bg-glass-dark: rgba(6, 15, 10, 0.75);
  
  --text-primary: #E2F0E8;
  --text-secondary: #A8C8B4;
  --text-heading: #F0FAF4;
  --text-link: #66CDAA;
  --text-footer: #8FA89A;
  --text-on-brand: #FFFFFF;
  
  --border-light: #2A4A38;
  --border-medium: #3A5A48;
  --shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 12px 30px rgba(0, 0, 0, 0.6);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.5);
  
  --brand-primary: #3CB371;
  --brand-primary-dark: #2E8B57;
  --brand-accent: #66CDAA;
  --brand-accent-light: #8FDCB8;
  --brand-secondary: #4A90B8;
  --brand-secondary-light: #6AA8CC;
  --brand-gradient: linear-gradient(135deg, #2E8B57, #1F4E79);
  --brand-gradient-light: linear-gradient(135deg, #3CB371, #2D6A9F);
}

/* ====== 基础样式重置 ====== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-light);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand-accent), var(--brand-secondary));
  border-radius: 10px;
  border: 2px solid var(--bg-light);
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary-light));
}

::selection {
  background: var(--brand-primary);
  color: #fff;
}

/* ====== 通用容器 ====== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* 标题层级 */
h1, h2, h3, h4, h5 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin-bottom: 0.5em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.3em;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  position: relative;
  padding-bottom: 0.4em;
  margin-bottom: 1.2em;
  display: flex;
  align-items: center;
  gap: 12px;
}
h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--brand-gradient);
  border-radius: 4px;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 600;
}

h4 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6em;
}

p {
  margin-bottom: 1em;
  color: var(--text-primary);
  line-height: 1.8;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
  position: relative;
}

a:hover {
  color: var(--brand-accent);
  text-decoration: none;
}

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

ul, ol {
  list-style-position: inside;
  margin-bottom: 1em;
}

/* ====== 按钮 ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--brand-gradient);
  color: var(--text-on-brand) !important;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1.5;
  transition: all var(--transition-base);
  box-shadow: 0 4px 12px rgba(46, 139, 87, 0.3);
  text-decoration: none !important;
  letter-spacing: 0.3px;
  position: relative;
  overflow: hidden;
}

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

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(46, 139, 87, 0.4);
  color: var(--text-on-brand) !important;
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--brand-primary);
  color: var(--brand-primary) !important;
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--brand-gradient);
  color: #fff !important;
  border-color: transparent;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.9rem;
}

/* ====== 导航栏 ====== */
.navbar {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-base);
  min-height: var(--nav-height);
}

[data-theme="dark"] .navbar {
  background: var(--bg-glass-dark);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--border-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  min-height: var(--nav-height);
  gap: 15px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none !important;
  flex-shrink: 0;
}

.logo svg {
  width: 36px;
  height: 36px;
  color: var(--brand-primary);
  transition: transform 0.5s ease;
}

.logo:hover svg {
  transform: rotate(180deg) scale(1.1);
}

.logo span {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.4rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.nav-links li {
  margin: 0;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 1.05rem;
  padding: 8px 4px;
  position: relative;
  text-decoration: none;
  transition: color var(--transition-base);
  letter-spacing: 0.3px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: 2px;
  transition: width var(--transition-base);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

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

/* 导航栏右侧工具区 */
.nav-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border-radius: 50px;
  padding: 4px 6px 4px 16px;
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  max-width: 220px;
}

.search-box:focus-within {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(46, 139, 87, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  width: 100%;
  min-width: 120px;
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.search-box button {
  background: var(--brand-gradient);
  border: none;
  color: white;
  padding: 8px 18px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.search-box button:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(46, 139, 87, 0.3);
}

/* 主题切换按钮 */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.theme-toggle:hover {
  transform: rotate(30deg) scale(1.1);
  box-shadow: 0 4px 16px rgba(46, 139, 87, 0.2);
  border-color: var(--brand-accent);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--text-primary);
  padding: 8px;
  transition: all var(--transition-fast);
}

.menu-toggle:hover {
  color: var(--brand-primary);
  transform: scale(1.1);
}

/* ====== 移动端导航响应式 ====== */
@media (max-width: 1024px) {
  .nav-tools {
    gap: 8px;
  }
  .search-box {
    max-width: 160px;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0;
    gap: 0.5rem;
    background: var(--bg-card);
    border-radius: 16px;
    margin-top: 10px;
    box-shadow: var(--shadow-hover);
    border: 1px solid var(--border-light);
  }
  
  .nav-links.active {
    display: flex;
    animation: slideDown 0.3s ease;
  }
  
  .nav-links li {
    width: 100%;
  }
  
  .nav-links a {
    display: block;
    padding: 12px 20px;
    border-radius: 8px;
  }
  
  .nav-links a::after {
    display: none;
  }
  
  .nav-links a:hover {
    background: var(--bg-light);
  }
  
  .menu-toggle {
    display: block;
  }
  
  .navbar .container {
    gap: 8px;
  }
  
  .search-box {
    max-width: 100%;
    flex: 1;
  }
  
  .search-box input {
    min-width: 80px;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ====== Banner 区域 ====== */
.hero-banner {
  background: linear-gradient(135deg, #1E6B3E 0%, #2E8B57 30%, #1F4E79 70%, #2D6A9F 100%);
  border-radius: var(--radius-lg);
  padding: 3.5rem 3rem;
  color: white;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(31, 78, 57, 0.2);
  margin: 2rem 0;
  min-height: 280px;
  display: flex;
  align-items: center;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.hero-banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(60, 179, 113, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite reverse;
}

.hero-banner .hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-banner h1 {
  color: #fff;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: 0.3em;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  background: none;
  -webkit-text-fill-color: #fff;
  background-clip: unset;
}

.hero-banner p {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.5em;
  text-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

.hero-banner .btn {
  background: #fff;
  color: #1E6B3E !important;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.hero-banner .btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(10px);
  padding: 5px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: #fff;
  letter-spacing: 1px;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.05); }
}

/* ====== 卡片栅格 ====== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 2rem 0;
}

/* ====== 卡片样式 ====== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  height: 100%;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--brand-accent);
}

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

.card h3 {
  margin-top: 0;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card h3 .icon {
  font-size: 1.6rem;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.card .card-link {
  display: inline-block;
  margin-top: 0.8rem;
  font-weight: 600;
  color: var(--brand-primary);
  transition: all var(--transition-fast);
}

.card .card-link:hover {
  color: var(--brand-accent);
  transform: translateX(5px);
}

/* 卡片变体 - 带图标 */
.icon-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
}

.icon-card .icon-circle {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.2rem;
  background: var(--brand-gradient-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: 0 8px 20px rgba(46, 139, 87, 0.25);
  transition: all var(--transition-base);
}

.icon-card:hover .icon-circle {
  transform: scale(1.1) rotate(10deg);
}

/* ====== 文章列表 ====== */
.article-list {
  display: grid;
  gap: 1.8rem;
}

.article-item {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.article-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--brand-gradient);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s ease;
}

.article-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--brand-accent);
}

.article-item:hover::before {
  transform: scaleY(1);
}

.article-item h3 {
  margin-bottom: 0.4rem;
  font-size: 1.25rem;
  transition: color var(--transition-fast);
}

.article-item h3:hover {
  color: var(--brand-primary);
}

.article-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.article-meta .tag {
  background: var(--brand-gradient-light);
  color: #fff;
  padding: 2px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 500;
}

.article-item p {
  margin-bottom: 1rem;
}

.article-item .btn {
  margin-top: 0.5rem;
}

/* ====== FAQ 样式 ====== */
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}

.faq-item:hover {
  border-color: var(--brand-accent);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: var(--brand-primary);
  box-shadow: 0 4px 16px rgba(46, 139, 87, 0.1);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-heading);
  font-size: 1.05rem;
  transition: all var(--transition-fast);
  user-select: none;
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  background: var(--brand-gradient-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  background: var(--brand-gradient);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem;
  color: var(--text-primary);
  border-top: 1px dashed var(--border-light);
  padding-top: 1rem;
  margin-top: 0;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ====== 表格样式 ====== */
.info-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.info-table th,
.info-table td {
  padding: 1rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.info-table th {
  background: var(--brand-gradient);
  color: white;
  font-weight: 600;
  letter-spacing: 0.5px;
}

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

.info-table tr:hover td {
  background: var(--bg-light);
}

/* ====== 代码块 / 标签 ====== */
.tag {
  background: var(--brand-gradient-light);
  color: white;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  display: inline-block;
  margin-right: 0.5rem;
  font-weight: 500;
  letter-spacing: 0.3px;
}

/* ====== 场景卡片 ====== */
.scene-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  height: 100%;
  position: relative;
  overflow: hidden;
}

.scene-card::after {
  content: '';
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 80px;
  height: 80px;
  background: var(--brand-gradient-light);
  opacity: 0.1;
  border-radius: 50%;
  transition: all 0.4s ease;
}

.scene-card:hover::after {
  transform: scale(1.5);
  opacity: 0.2;
}

.scene-card h4 {
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.scene-card h4 .icon {
  font-size: 1.6rem;
}

/* ====== HowTo 教程样式 ====== */
.howto-section {
  background: var(--bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.howto-section::before {
  content: '📺';
  position: absolute;
  top: -10px;
  right: 20px;
  font-size: 4rem;
  opacity: 0.06;
  transform: rotate(15deg);
}

.howto-steps {
  display: grid;
  gap: 1.2rem;
  margin: 1.5rem 0;
}

.howto-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 1rem;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.howto-step:hover {
  transform: translateX(5px);
  border-color: var(--brand-accent);
}

.howto-step .step-num {
  width: 36px;
  height: 36px;
  min-width: 36px;
  background: var(--brand-gradient);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(46, 139, 87, 0.3);
}

.howto-step .step-content {
  flex: 1;
}

.howto-step .step-content h5 {
  margin-bottom: 0.2rem;
  font-size: 1.05rem;
}

.howto-step .step-content p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ====== 联系信息卡片 ====== */
.contact-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: var(--brand-gradient-light);
  opacity: 0.05;
  border-radius: 0 0 0 100%;
  transition: all 0.4s ease;
}

.contact-card:hover::before {
  width: 150px;
  height: 150px;
}

.contact-card h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.contact-card p {
  font-size: 0.95rem;
  line-height: 2;
  margin-bottom: 0;
}

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

/* ====== Footer 样式 ====== */
.site-footer {
  background: var(--bg-footer);
  color: var(--text-footer);
  padding: 3rem 0 0;
  margin-top: 3rem;
  position: relative;
  border-top: 3px solid var(--brand-primary);
}

.site-footer h4 {
  color: #fff;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.site-footer a {
  color: var(--text-footer);
  transition: all var(--transition-fast);
}

.site-footer a:hover {
  color: var(--brand-accent-light);
  text-decoration: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-links a::before {
  content: '›';
  color: var(--brand-accent);
  font-weight: bold;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 1.5rem 0;
  font-size: 0.85rem;
  text-align: center;
  color: var(--text-footer);
}

.footer-bottom p {
  margin-bottom: 0.3rem;
  color: var(--text-footer);
}

/* ====== 返回顶部按钮 ====== */
.to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--brand-gradient);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(46, 139, 87, 0.3);
  border: none;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
}

.to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(46, 139, 87, 0.4);
}

/* ====== 滚动显示动画 ====== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.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; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ====== 毛玻璃效果工具类 ====== */
.glass-effect {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
}

[data-theme="dark"] .glass-effect {
  background: var(--bg-glass-dark);
  border-color: rgba(255, 255, 255, 0.08);
}

/* ====== 动画关键帧 ====== */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

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

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

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

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

/* ====== 响应式工具 ====== */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-banner {
    padding: 2.5rem 1.5rem;
    border-radius: 16px;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .article-item {
    padding: 1.5rem;
  }
  
  .howto-section {
    padding: 1.5rem;
  }
  
  .contact-card {
    padding: 1.5rem;
  }
  
  .btn {
    padding: 10px 22px;
  }
  
  .to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
  }
}

@media (max-width: 480px) {
  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .hero-banner h1 {
    font-size: 2rem;
  }
  
  .navbar .container {
    flex-direction: column;
    align-items: stretch;
  }
  
  .logo {
    justify-content: center;
  }
  
  .nav-tools {
    width: 100%;
    justify-content: center;
  }
  
  .search-box {
    flex: 1;
    max-width: 100%;
  }
}

/* 打印样式 */
@media print {
  .navbar,
  .site-footer,
  .to-top,
  .theme-toggle,
  .search-box,
  .menu-toggle {
    display: none !important;
  }
  
  body {
    background: #fff;
    color: #000;
  }
  
  .card,
  .article-item,
  .faq-item,
  .howto-section,
  .contact-card {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}

/* 无障碍：减少动效 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden {
  display: none !important;
}
```