/* ============================================
   bti体育网站app — 暖阳珊瑚设计系统
   独特配色：奶油白 + 暖珊瑚 + 鼠尾草绿
   ============================================ */

:root {
  --color-bg: #fefaf3;
  --color-bg-alt: #faf5eb;
  --color-bg-warm: #f7f0e4;
  --color-text: #3d2c2a;
  --color-text-muted: #6b5d58;
  --color-text-light: #8c7b75;
  --color-primary: #d4726a;
  --color-primary-hover: #c26058;
  --color-primary-light: #fce8e4;
  --color-secondary: #6b8f71;
  --color-secondary-hover: #5a7d60;
  --color-secondary-light: #e8f2e9;
  --color-border: #e8ddd0;
  --color-border-light: #f0e8db;
  --color-card-bg: #ffffff;
  --color-card-bg-alt: #fffdf9;
  --color-shadow: rgba(180, 150, 130, 0.12);
  --color-shadow-hover: rgba(180, 150, 130, 0.22);
  --color-footer-bg: #f5ede0;
  --color-accent-gold: #e8c170;
  --color-accent-rose: #e8b4ad;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s 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(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 选中文字样式 */
::selection {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-light);
}

/* 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(--color-bg-alt);
}

/* 偶数section微妙的顶部纹理 */
.section:nth-child(even)::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* 导航 — 固定顶部 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(254, 250, 243, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition-smooth);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px var(--color-shadow);
}

.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: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.3px;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.8;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--color-primary), #e8897f);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 3px 10px rgba(212, 114, 106, 0.3);
}

.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(--color-text);
  padding: 8px 14px;
  border-radius: 6px;
  transition: all var(--transition-fast);
  letter-spacing: 0.2px;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

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

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

.nav-cta {
  padding: 9px 22px !important;
  border-radius: 25px !important;
  color: #fff !important;
  font-weight: 600 !important;
  background: linear-gradient(135deg, var(--color-primary), #e8897f);
  box-shadow: 0 3px 12px rgba(212, 114, 106, 0.3);
  letter-spacing: 0.3px !important;
  transition: all var(--transition-smooth) !important;
}

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

.nav-cta:hover {
  background: linear-gradient(135deg, var(--color-primary-hover), #d47068);
  box-shadow: 0 5px 18px rgba(212, 114, 106, 0.4);
  transform: translateY(-2px);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--color-text);
  font-size: 1.4rem;
  transition: background var(--transition-fast);
}

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

/* 首页Hero */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  padding-bottom: 60px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 30% 50%, rgba(232, 193, 112, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 65% 20%, rgba(212, 114, 106, 0.06) 0%, transparent 55%),
    var(--color-bg);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -120px;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 180, 173, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 25px;
  margin-bottom: 18px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  letter-spacing: 0.5px;
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.15;
  margin-bottom: 20px;
  font-weight: 800;
  letter-spacing: -0.6px;
  color: var(--color-text);
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero h1 .highlight {
  color: var(--color-primary);
  position: relative;
  display: inline-block;
}

.hero h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 10px;
  background: var(--color-primary-light);
  border-radius: 3px;
  z-index: -1;
  opacity: 0.7;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 32px;
  color: var(--color-text-muted);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex-shrink: 0;
  width: 420px;
  box-shadow: 0 20px 50px var(--color-shadow);
  position: relative;
  z-index: 2;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  background: var(--color-bg-alt);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition-smooth);
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 25px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #e07b6e);
  color: #fff;
  box-shadow: 0 4px 16px rgba(212, 114, 106, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 22px rgba(212, 114, 106, 0.45);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-hover);
  color: var(--color-primary-hover);
  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;
  color: var(--color-secondary);
  text-transform: uppercase;
  position: relative;
  padding-left: 28px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 1px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 14px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--color-text);
  line-height: 1.2;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 40px;
  color: var(--color-text-muted);
  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 28px;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-smooth);
  background: var(--color-card-bg);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-rose));
  border-radius: 0 0 3px 3px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-smooth);
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px var(--color-shadow-hover);
  border-color: transparent;
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: var(--color-primary-light);
  color: var(--color-primary);
  transition: all var(--transition-smooth);
}

.category-card:hover .card-icon {
  background: var(--color-primary);
  color: #fff;
  transform: scale(1.05);
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--color-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  margin-top: 6px;
}

.card-link::after {
  content: '→';
  transition: transform var(--transition-fast);
  font-size: 0.9rem;
}

.card-link:hover {
  color: var(--color-secondary-hover);
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* 特性块 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 40px var(--color-shadow);
  position: relative;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
}

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

.feature-text h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

.feature-text p {
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}

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

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text);
  transition: transform var(--transition-fast);
}

.feature-list li:hover {
  transform: translateX(4px);
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  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: 1px solid var(--color-border-light);
  background: var(--color-card-bg);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 20%;
  right: 20%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  border-radius: 3px;
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px var(--color-shadow-hover);
}

.stat-item:hover::after {
  opacity: 1;
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
  line-height: 1;
}

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

/* 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: 1px solid var(--color-border-light);
  transition: all var(--transition-smooth);
  background: var(--color-card-bg);
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 34px var(--color-shadow-hover);
  border-color: transparent;
}

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

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

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

.content-wall-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
  letter-spacing: -0.2px;
}

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

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

.faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-card-bg);
  transition: all var(--transition-smooth);
}

.faq-item:hover {
  border-color: var(--color-border);
  box-shadow: 0 3px 12px var(--color-shadow);
}

.faq-item.open {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(212, 114, 106, 0.12);
  background: var(--color-card-bg-alt);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
  font-size: 0.98rem;
  transition: color var(--transition-fast);
  gap: 12px;
}

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

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-text-light);
  transition: all var(--transition-smooth);
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-bg-alt);
}

.faq-item.open .faq-question::after {
  content: '−';
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0.75;
  color: var(--color-text-muted);
  line-height: 1.7;
  font-size: 0.93rem;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeInUp 0.4s ease-out;
}

/* CTA横幅 */
.cta-banner {
  padding: 60px 24px;
  text-align: center;
  border-radius: var(--radius-xl);
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), #db7a6b, #c96a5e);
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(212, 114, 106, 0.3);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.4px;
  position: relative;
  z-index: 2;
  margin-bottom: 10px;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  z-index: 2;
  margin-bottom: 24px;
  font-size: 1.05rem;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 2;
  font-weight: 700;
}

.cta-banner .btn-primary:hover {
  background: #fffefc;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.16);
  transform: translateY(-2px);
}

/* 页脚 */
.site-footer {
  padding: 60px 0 28px;
  background: var(--color-footer-bg);
  color: var(--color-text);
  border-top: 1px solid var(--color-border-light);
}

.site-footer .container {
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand .logo {
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 8px;
}

.footer-col h4 {
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--color-text);
}

.footer-col a {
  display: block;
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 5px 0;
  transition: all var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  margin-top: 44px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* 工具类 */
.text-accent {
  color: var(--color-primary);
  font-weight: 600;
}

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

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

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

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

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 1024px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 90px;
    min-height: auto;
  }

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

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

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

  .hero-image {
    width: 100%;
    max-width: 480px;
    margin-top: 32px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .feature-block {
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

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

  .section-title {
    font-size: 1.7rem;
  }

  .hero {
    padding-top: 80px;
  }

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

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

  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-image {
    order: -1;
  }

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

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

  .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, 243, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 20px;
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: 0 10px 30px var(--color-shadow);
    gap: 4px;
    align-items: stretch;
  }

  .main-nav.open a {
    padding: 12px 16px;
    border-radius: 8px;
    width: 100%;
  }

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

  .cta-banner {
    padding: 44px 20px;
    border-radius: var(--radius-lg);
  }

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

  .category-card {
    padding: 24px 20px;
  }

  .card-icon {
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
    border-radius: 12px;
  }
}

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

  .header-inner {
    padding: 0 16px;
  }

  .hero {
    padding-top: 72px;
    padding-bottom: 40px;
  }

  .hero h1 {
    font-size: 1.7rem;
    letter-spacing: -0.3px;
  }

  .hero p {
    font-size: 0.93rem;
  }

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

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

  .hero-image {
    max-width: 100%;
    border-radius: var(--radius-md);
  }

  .section-title {
    font-size: 1.4rem;
  }

  .section-desc {
    font-size: 0.9rem;
  }

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

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

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

  .footer-brand .logo {
    justify-content: center;
  }

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

  .footer-col a:hover {
    padding-left: 0;
  }

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

  .cta-banner {
    padding: 36px 16px;
  }

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

  .faq-item .faq-question {
    font-size: 0.9rem;
    padding: 14px 16px;
  }

  .faq-item .faq-answer {
    padding: 0 16px 14px;
    font-size: 0.85rem;
  }

  .category-card {
    padding: 20px 16px;
  }

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

  .content-wall-body {
    padding: 16px 14px;
  }

  .btn {
    padding: 10px 22px;
    font-size: 0.9rem;
  }

  .section-label {
    font-size: 0.72rem;
    letter-spacing: 2px;
  }
}

/* 大屏幕优化 */
@media (min-width: 1400px) {
  .hero h1 {
    font-size: 3.4rem;
  }

  .hero-content {
    max-width: 780px;
  }

  .section-title {
    font-size: 2.5rem;
  }

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

/* 打印样式 */
@media print {
  .site-header {
    position: static;
  }

  .hero {
    min-height: auto;
    padding-top: 20px;
  }

  .btn,
  .nav-cta {
    border: 1px solid #000;
  }
}