/* ============================================
   小游戏在线玩 - 新复古游戏波普风格
   独特配色：奶油白 + 珊瑚粉 + 薄荷绿 + 薰衣草紫
   设计语言：柔和几何 + 趣味波普 + 现代极简
   ============================================ */

/* --- CSS自定义属性 --- */
:root {
  --bg-primary: #fefaf6;
  --bg-secondary: #f5faf7;
  --bg-warm: #fdf6f0;
  --surface: #ffffff;
  --border-light: #ede4db;
  --border-soft: #e8e0d6;
  --text-primary: #3d3228;
  --text-secondary: #6b5e52;
  --text-muted: #9b8e80;
  --coral: #ff6b6b;
  --coral-hover: #ff5252;
  --coral-light: #fff0ee;
  --mint: #4ecdc4;
  --mint-hover: #3dbdb5;
  --mint-light: #edfaf8;
  --lavender: #a78bfa;
  --lavender-light: #f5f0ff;
  --peach: #ffa07a;
  --peach-light: #fff5f0;
  --sunset-gradient: linear-gradient(135deg, #ff6b6b 0%, #ffa07a 50%, #ff8e7a 100%);
  --mint-gradient: linear-gradient(135deg, #4ecdc4 0%, #6edcd6 50%, #8eece6 100%);
  --lavender-gradient: linear-gradient(135deg, #a78bfa 0%, #c4b5fd 50%, #ddd6fe 100%);
  --card-shadow: 0 2px 16px rgba(180, 160, 140, 0.1);
  --card-shadow-hover: 0 8px 30px rgba(180, 160, 140, 0.18);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- 滚动条美化 --- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-soft);
  border-radius: 20px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- 核心布局 --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-secondary);
  position: relative;
}

.section:nth-child(even)::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 30% 70%, rgba(78, 205, 196, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 75% 20%, rgba(255, 107, 107, 0.03) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.section:nth-child(even) .container {
  position: relative;
  z-index: 1;
}

/* --- 导航 --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(254, 250, 246, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(180, 160, 140, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  transition: var(--transition);
}

.logo:hover {
  color: var(--coral);
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--sunset-gradient);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 3px 12px rgba(255, 107, 107, 0.25);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  top: 8px;
  right: 7px;
}

.logo:hover .logo-icon {
  transform: scale(1.05) rotate(-5deg);
  box-shadow: 0 5px 18px rgba(255, 107, 107, 0.35);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.main-nav li {
  position: relative;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: 20px;
  transition: var(--transition);
  position: relative;
  letter-spacing: 0.1px;
}

.main-nav a:hover {
  color: var(--coral);
  background: var(--coral-light);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2.5px;
  background: var(--coral);
  border-radius: 4px;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-cta {
  padding: 9px 22px !important;
  border-radius: 22px !important;
  color: #fff !important;
  font-weight: 700 !important;
  background: var(--sunset-gradient);
  box-shadow: 0 3px 14px rgba(255, 107, 107, 0.28);
  letter-spacing: 0.3px !important;
  transition: var(--transition) !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
  background: linear-gradient(135deg, #ff7b7b 0%, #ffb090 50%, #ff9e8a 100%) !important;
}

.nav-cta::after {
  display: none !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
  transition: var(--transition);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: var(--transition);
}

.menu-toggle:hover {
  background: var(--coral-light);
}

/* --- Hero --- */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 40px;
}

.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  top: -120px;
  right: -100px;
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(78, 205, 196, 0.07) 0%, transparent 70%);
  border-radius: 50%;
  bottom: -80px;
  left: -60px;
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 20px;
  margin-bottom: 18px;
  background: var(--mint-light);
  color: #2fa89f;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 2.8rem;
  line-height: 1.15;
  margin-bottom: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #ff6b6b 0%, #ffa07a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 32px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: 0 20px 60px rgba(180, 160, 140, 0.18);
  transform: rotate(1deg);
  transition: var(--transition);
  border: 3px solid #fff;
}

.hero-image:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 24px 70px rgba(180, 160, 140, 0.24);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(254, 250, 246, 0.3) 100%);
  pointer-events: none;
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 25px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
  letter-spacing: 0.2px;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  color: #fff;
  background: var(--sunset-gradient);
  box-shadow: 0 4px 18px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(255, 107, 107, 0.42);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  border-color: var(--coral);
  color: var(--coral);
  background: var(--coral-light);
  transform: translateY(-2px);
}

/* --- 标签/标题 --- */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  margin-bottom: 12px;
  text-transform: uppercase;
  color: var(--mint);
  position: relative;
  padding-left: 16px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 14px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--text-primary);
  line-height: 1.25;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 40px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* --- 卡片网格 --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  border: 1.5px solid var(--border-light);
  transition: var(--transition);
  background: var(--surface);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--sunset-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 0 0 4px 4px;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: transparent;
}

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

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  transition: var(--transition);
}

.category-card:nth-child(4n + 1) .card-icon {
  background: var(--coral-light);
  color: var(--coral);
}
.category-card:nth-child(4n + 2) .card-icon {
  background: var(--mint-light);
  color: var(--mint);
}
.category-card:nth-child(4n + 3) .card-icon {
  background: var(--lavender-light);
  color: var(--lavender);
}
.category-card:nth-child(4n + 4) .card-icon {
  background: var(--peach-light);
  color: var(--peach);
}

.category-card:hover .card-icon {
  transform: scale(1.1) rotate(-5deg);
}

.category-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.category-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--coral);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
  transition: var(--transition);
}

.card-link:hover {
  gap: 8px;
  color: var(--coral-hover);
}

/* --- 特性块 --- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  border: 2px solid var(--border-light);
  transition: var(--transition);
}

.feature-image:hover {
  box-shadow: var(--card-shadow-hover);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.feature-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: var(--text-primary);
  transition: var(--transition);
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: #fff;
  background: var(--mint);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}

/* --- 数据条 --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 28px 20px;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border-light);
  background: var(--surface);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  border-radius: 3px;
  transition: var(--transition);
}

.stat-item:nth-child(1)::after {
  background: var(--coral);
}
.stat-item:nth-child(2)::after {
  background: var(--mint);
}
.stat-item:nth-child(3)::after {
  background: var(--lavender);
}
.stat-item:nth-child(4)::after {
  background: var(--peach);
}

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

.stat-item:hover::after {
  width: 60px;
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #ff6b6b 0%, #ffa07a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-item:nth-child(2) .stat-number {
  background: linear-gradient(135deg, #4ecdc4 0%, #6edcd6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item:nth-child(3) .stat-number {
  background: linear-gradient(135deg, #a78bfa 0%, #c4b5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item:nth-child(4) .stat-number {
  background: linear-gradient(135deg, #ffa07a 0%, #ffc4a0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-top: 8px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* --- 内容墙 --- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.content-wall-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1.5px solid var(--border-light);
  transition: var(--transition);
  background: var(--surface);
  cursor: pointer;
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
  border-color: transparent;
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: var(--transition);
}

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

.content-wall-body {
  padding: 20px 22px;
}

.content-wall-body h4 {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.content-wall-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.content-wall-body .meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* --- FAQ --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--surface);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--mint);
}

.faq-item.open {
  border-color: var(--mint);
  box-shadow: 0 4px 20px rgba(78, 205, 196, 0.12);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  transition: var(--transition);
  user-select: none;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--mint);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.open .faq-question {
  color: var(--mint);
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0.7;
  color: var(--text-secondary);
  line-height: 1.7;
  animation: fadeSlideIn 0.3s ease;
}

.faq-item.open .faq-answer {
  display: block;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 0.7;
    transform: translateY(0);
  }
}

/* --- CTA横幅 --- */
.cta-banner {
  padding: 60px 24px;
  text-align: center;
  border-radius: var(--radius-xl);
  color: #fff;
  background: linear-gradient(135deg, #ff6b6b 0%, #ff8e7a 30%, #ffa07a 60%, #ffb899 100%);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  top: -60px;
  right: -40px;
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  bottom: -30px;
  left: -30px;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
  font-size: 1.05rem;
}

.cta-banner .btn-primary {
  background: #fff;
  color: #ff6b6b;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 1;
  font-weight: 700;
}

.cta-banner .btn-primary:hover {
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.16);
  transform: translateY(-2px);
  color: #ff5252;
}

/* --- 页脚 --- */
.site-footer {
  padding: 56px 0 28px;
  background: #faf5ef;
  border-top: 1px solid var(--border-light);
  position: relative;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand h3 {
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

.footer-col h4 {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 14px;
  color: var(--text-primary);
  letter-spacing: 0.3px;
}

.footer-col a {
  display: block;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--coral);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- 工具类 --- */
.text-accent {
  color: var(--coral);
  font-weight: 700;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--text-secondary);
  line-height: 1.7;
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 36px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    max-width: 480px;
    margin: 0 auto;
  }

  .feature-block {
    gap: 36px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .hero {
    min-height: 55vh;
    padding-top: 80px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .feature-text h3 {
    font-size: 1.3rem;
  }

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

  .stat-number {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  /* 移动端导航 */
  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(254, 250, 246, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 20px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 8px 30px rgba(180, 160, 140, 0.1);
    z-index: 999;
  }

  .main-nav.open a {
    display: block;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

  .main-nav.open .nav-cta {
    text-align: center;
    margin-top: 8px;
  }

  .cards-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .content-wall {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .cta-banner {
    padding: 44px 20px;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 44px 0;
  }

  .section-title {
    font-size: 1.35rem;
  }

  .hero {
    min-height: 50vh;
    padding-top: 80px;
  }

  .hero h1 {
    font-size: 1.65rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-block {
    gap: 20px;
  }

  .category-card {
    padding: 22px 20px;
  }

  .stat-item {
    padding: 22px 16px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .cta-banner {
    padding: 36px 16px;
    border-radius: var(--radius-lg);
  }

  .cta-banner h2 {
    font-size: 1.3rem;
  }

  .content-wall-item img {
    height: 160px;
  }

  .faq-item .faq-question {
    padding: 14px 16px;
    font-size: 0.95rem;
  }

  .faq-item .faq-answer {
    padding: 0 16px 14px;
  }
}

/* --- 额外细节：选中文本颜色 --- */
::selection {
  background: var(--coral-light);
  color: var(--coral);
}

/* --- 图片懒加载占位 --- */
img {
  background: var(--bg-secondary);
}

/* --- 焦点可见样式 --- */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
  border-radius: 4px;
}

/* --- 打印样式 --- */
@media print {
  .site-header,
  .menu-toggle,
  .cta-banner,
  .site-footer {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  .section {
    padding: 20px 0;
  }
}