/* =============================================
   南宫体育h5 · 独家视觉系统 - 轻氧流体
   风格关键词：轻薄杂志感 · 渐变撞色 · 几何装饰
   主色：珊瑚橙 (#FF6B6B) · 灰蓝 (#4A7B9D) · 淡香槟 (#F7D794)
   背景：暖白基底 (#FDF8F2)
   ============================================= */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  overflow-x: hidden;
  background-color: #FDF8F2;
  color: #2D3E50;
  line-height: 1.6;
}

/* 定义设计令牌 */
:root {
  --coral: #FF6B6B;
  --coral-light: #FF8F8F;
  --slate: #4A7B9D;
  --slate-light: #7BA7C4;
  --champagne: #F7D794;
  --champagne-light: #FDE3A0;
  --bg-warm: #FDF8F2;
  --bg-cool: #F0F4F7;
  --text-primary: #2D3E50;
  --text-secondary: #5A6E7A;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(74, 123, 157, 0.12);
  --shadow-soft: 0 8px 24px rgba(74, 123, 157, 0.08), 0 2px 6px rgba(0,0,0,0.02);
  --shadow-hover: 0 12px 32px rgba(74, 123, 157, 0.14), 0 4px 12px rgba(0,0,0,0.04);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

.section:nth-child(even) {
  background: var(--bg-cool);
}

/* 导航 — 固定顶部 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 248, 242, 0.92);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid rgba(255, 107, 107, 0.15);
}

.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: 1.25rem;
  text-decoration: none;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  transition: var(--transition);
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: linear-gradient(135deg, var(--coral), var(--champagne));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 2px 8px rgba(255, 107, 107, 0.25);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--coral);
  transition: var(--transition);
  border-radius: 2px;
}

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

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

.nav-cta {
  padding: 8px 24px !important;
  border-radius: 50px !important;
  background: linear-gradient(135deg, var(--coral), var(--champagne)) !important;
  color: #fff !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 12px rgba(255, 107, 107, 0.25);
  transition: var(--transition) !important;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.35) !important;
}

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

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.2rem;
  transition: var(--transition);
}

.menu-toggle:hover {
  background: var(--coral);
  color: #fff;
  border-color: var(--coral);
}

/* 首页Hero */
.hero {
  min-height: 75vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 68px;
  background: linear-gradient(180deg, rgba(255, 107, 107, 0.04) 0%, rgba(247, 215, 148, 0.06) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 107, 107, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--coral-light), var(--champagne-light));
  color: #fff;
  box-shadow: 0 2px 8px rgba(255, 107, 107, 0.2);
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  font-weight: 800;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--coral), var(--slate));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--coral), var(--slate));
  box-shadow: 0 4px 14px rgba(74, 123, 157, 0.25);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(74, 123, 157, 0.35);
}

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

.btn-outline:hover {
  background: var(--slate);
  color: #fff;
  border-color: var(--slate);
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 14px;
  color: var(--coral);
  text-transform: uppercase;
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.08), rgba(247, 215, 148, 0.08));
  padding: 4px 12px;
  border-radius: 50px;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 14px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.section-desc {
  max-width: 600px;
  color: var(--text-secondary);
  margin-bottom: 44px;
  font-size: 1rem;
  line-height: 1.7;
}

/* 卡片网格 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: var(--radius-md);
  padding: 32px 28px;
  background: var(--card-bg);
  backdrop-filter: blur(6px);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--coral), var(--champagne), var(--slate));
  opacity: 0;
  transition: var(--transition);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 107, 107, 0.2);
}

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

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.6rem;
  background: linear-gradient(135deg, var(--champagne-light), rgba(74, 123, 157, 0.1));
  color: var(--slate);
}

.card-link {
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--coral);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-link:hover {
  gap: 12px;
  color: var(--slate);
}

/* 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: var(--shadow-soft);
  border: 1px solid var(--card-border);
}

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

.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

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

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: var(--text-primary);
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: var(--coral);
  font-size: 1.1rem;
}

/* 数据条 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-md);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  position: relative;
}

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

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--coral), var(--slate));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

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

/* 内容墙 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  transition: var(--transition);
}

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

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

.content-wall-item:hover img {
  transform: scale(1.03);
}

.content-wall-body {
  padding: 24px 20px;
}

.content-wall-body h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.content-wall-body p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

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

.faq-item:hover {
  border-color: rgba(255, 107, 107, 0.2);
  box-shadow: 0 2px 8px rgba(74, 123, 157, 0.06);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  font-size: 1rem;
}

.faq-item .faq-question::after {
  content: '▾';
  font-size: 0.8rem;
  color: var(--coral);
  transition: var(--transition);
}

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

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

/* CTA横幅 */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--coral), var(--slate), var(--champagne));
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(255,255,255,0.03) 20px,
    rgba(255,255,255,0.03) 40px
  );
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 1.8rem;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--coral);
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: var(--champagne-light);
  color: var(--text-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* 页脚 */
.site-footer {
  padding: 60px 0 32px;
  background: var(--text-primary);
  color: rgba(255,255,255,0.8);
}

.site-footer .container {
  max-width: 1200px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  max-width: 300px;
}

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

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  opacity: 0.7;
}

.footer-col h5 {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
  opacity: 0.9;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 48px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

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

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

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

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

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

/* 可选：呼应运动的斜线装饰 */
.section.decorated::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 6px,
    rgba(255, 107, 107, 0.04) 6px,
    rgba(255, 107, 107, 0.04) 12px
  );
  pointer-events: none;
  z-index: 1;
}

/* ⚠️ 响应式 */
@media (max-width: 1024px) {
  .section-title {
    font-size: 1.8rem;
  }
  .hero h1 {
    font-size: 2.4rem;
  }
}

@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .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: var(--bg-warm);
    backdrop-filter: blur(16px);
    padding: 24px 32px;
    border-bottom: 1px solid var(--card-border);
    gap: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  }
  .main-nav.open a {
    font-size: 1rem;
  }
  .hero {
    min-height: 60vh;
    padding-top: 100px;
  }
  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  .cards-grid,
  .content-wall {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

@media (max-width: 480px) {
  .section {
    padding: 56px 0;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.5rem;
  }
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .stat-item {
    padding: 24px 16px;
  }
  .stat-number {
    font-size: 2rem;
  }
  .cta-banner {
    padding: 48px 20px;
  }
  .cta-banner h2 {
    font-size: 1.4rem;
  }
  .footer-brand {
    max-width: 100%;
  }
}

/* 微调高亮和选中文本 */
::selection {
  background: var(--coral);
  color: #fff;
}

/* 滚动条美化（可选） */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-cool);
}
::-webkit-scrollbar-thumb {
  background: var(--slate-light);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--slate);
}