/* 基础重置 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif; overflow-x: hidden; background: #FFF8F0; color: #3D2C1E; }

/* 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: #FFF3E8; }

/* 导航 — 固定顶部 */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(255,248,240,0.92); backdrop-filter: blur(12px); border-bottom: 2px solid #E8D5C0; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.3rem; text-decoration: none; color: #8B4513; letter-spacing: 2px; }
.logo-icon { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, #D4A574, #8B4513); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: #FFF; box-shadow: 0 4px 12px rgba(139,69,19,0.3); }
.main-nav { display: flex; align-items: center; gap: 28px; list-style: none; }
.main-nav a { text-decoration: none; font-size: 0.9rem; font-weight: 500; color: #5C4033; transition: 0.3s; padding: 4px 0; border-bottom: 2px solid transparent; letter-spacing: 1px; }
.main-nav a:hover { color: #8B4513; border-bottom-color: #D4A574; }
.nav-cta { padding: 10px 24px; border-radius: 50px; background: linear-gradient(135deg, #D4A574, #8B4513); color: #FFF !important; font-weight: 700; border: none; box-shadow: 0 4px 16px rgba(139,69,19,0.25); transition: 0.3s; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(139,69,19,0.35); }
.menu-toggle { display: none; background: none; border: 2px solid #8B4513; color: #8B4513; padding: 8px 12px; border-radius: 8px; cursor: pointer; font-size: 1.2rem; }

/* 首页Hero */
.hero { min-height: 80vh; display: flex; align-items: center; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -30%; right: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(212,165,116,0.15) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
.hero::after { content: '鼎'; position: absolute; bottom: 10%; left: 5%; font-size: 20rem; font-weight: 900; color: rgba(139,69,19,0.04); pointer-events: none; font-family: serif; }
.hero-content { max-width: 720px; position: relative; z-index: 1; }
.hero-eyebrow { display: inline-block; font-size: 0.8rem; font-weight: 700; padding: 6px 18px; border-radius: 50px; background: linear-gradient(135deg, #D4A574, #8B4513); color: #FFF; margin-bottom: 20px; letter-spacing: 3px; text-transform: uppercase; }
.hero h1 { font-size: 3.2rem; line-height: 1.15; margin-bottom: 20px; color: #3D2C1E; font-weight: 800; letter-spacing: -1px; }
.hero h1 span { color: #8B4513; }
.hero p { font-size: 1.15rem; opacity: 0.75; max-width: 560px; margin-bottom: 36px; color: #5C4033; line-height: 1.7; }
.hero-buttons { display: flex; gap: 16px; }
.hero-image { border-radius: 16px; overflow: hidden; box-shadow: 0 8px 48px rgba(139,69,19,0.12); border: 2px solid #E8D5C0; }
.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: 700; cursor: pointer; border: none; text-decoration: none; transition: 0.3s; font-size: 0.95rem; letter-spacing: 1px; }
.btn-primary { background: linear-gradient(135deg, #D4A574, #8B4513); color: #FFF; box-shadow: 0 4px 20px rgba(139,69,19,0.25); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(139,69,19,0.35); }
.btn-outline { background: transparent; border: 2px solid #8B4513; color: #8B4513; }
.btn-outline:hover { background: rgba(139,69,19,0.06); transform: translateY(-2px); }

/* 标签/标题 */
.section-label { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 4px; margin-bottom: 12px; color: #8B4513; text-transform: uppercase; padding: 4px 0; border-bottom: 2px solid #D4A574; }
.section-title { font-size: 2.4rem; margin-bottom: 16px; color: #3D2C1E; font-weight: 800; letter-spacing: -0.5px; }
.section-desc { max-width: 600px; opacity: 0.7; margin-bottom: 44px; color: #5C4033; 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: 16px; padding: 32px; background: #FFF; border: 2px solid #E8D5C0; transition: 0.3s; position: relative; overflow: hidden; }
.category-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, #D4A574, #8B4513); opacity: 0; transition: 0.3s; }
.category-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(139,69,19,0.1); border-color: #D4A574; }
.category-card:hover::before { opacity: 1; }
.card-icon { width: 52px; height: 52px; border-radius: 12px; background: linear-gradient(135deg, #FFF3E8, #E8D5C0); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; font-size: 1.4rem; color: #8B4513; }
.card-link { font-weight: 700; font-size: 0.85rem; text-decoration: none; color: #8B4513; display: inline-flex; align-items: center; gap: 6px; transition: 0.2s; }
.card-link:hover { gap: 10px; }

/* 特性块 */
.feature-block { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.feature-image { border-radius: 16px; overflow: hidden; box-shadow: 0 8px 40px rgba(139,69,19,0.1); border: 2px solid #E8D5C0; }
.feature-image img { width: 100%; height: auto; display: block; }
.feature-text { }
.feature-list { list-style: none; }
.feature-list li { padding: 8px 0; display: flex; align-items: center; gap: 10px; color: #5C4033; }
.feature-list li::before { content: '✦'; font-weight: 700; color: #D4A574; font-size: 1.1rem; }

/* 数据条 */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item { padding: 32px 24px; border-radius: 16px; background: #FFF; border: 2px solid #E8D5C0; transition: 0.3s; }
.stat-item:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(139,69,19,0.08); }
.stat-number { font-size: 2.6rem; font-weight: 900; color: #8B4513; line-height: 1; }
.stat-label { font-size: 0.9rem; opacity: 0.6; margin-top: 8px; color: #5C4033; 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: 16px; overflow: hidden; background: #FFF; border: 2px solid #E8D5C0; transition: 0.3s; }
.content-wall-item:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(139,69,19,0.1); border-color: #D4A574; }
.content-wall-item img { width: 100%; height: 220px; object-fit: cover; display: block; }
.content-wall-body { padding: 24px; }
.content-wall-body h3 { font-size: 1.15rem; margin-bottom: 8px; color: #3D2C1E; }
.content-wall-body p { color: #5C4033; opacity: 0.7; font-size: 0.9rem; line-height: 1.6; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 2px solid #E8D5C0; border-radius: 12px; margin-bottom: 12px; overflow: hidden; cursor: pointer; background: #FFF; transition: 0.3s; }
.faq-item:hover { border-color: #D4A574; }
.faq-item .faq-question { padding: 18px 24px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; color: #3D2C1E; font-size: 1.05rem; }
.faq-item .faq-question::after { content: '+'; font-size: 1.4rem; color: #8B4513; transition: 0.3s; }
.faq-item.open .faq-question::after { content: '−'; }
.faq-item .faq-answer { padding: 0 24px 18px; display: none; opacity: 0.75; color: #5C4033; line-height: 1.7; }
.faq-item.open .faq-answer { display: block; }

/* CTA横幅 */
.cta-banner { padding: 64px 32px; text-align: center; border-radius: 20px; background: linear-gradient(135deg, #D4A574, #8B4513); color: #FFF; position: relative; overflow: hidden; }
.cta-banner::before { content: '鼎'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); font-size: 18rem; font-weight: 900; color: rgba(255,255,255,0.06); pointer-events: none; }
.cta-banner h2 { color: #FFF; font-size: 2.2rem; margin-bottom: 12px; position: relative; z-index: 1; }
.cta-banner p { color: rgba(255,255,255,0.8); margin-bottom: 28px; position: relative; z-index: 1; }
.cta-banner .btn-primary { background: #FFF; color: #8B4513; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.cta-banner .btn-primary:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.15); }

/* 页脚 */
.site-footer { padding: 64px 0 32px; background: #3D2C1E; color: #E8D5C0; }
.site-footer .container { }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; }
.footer-brand { }
.footer-brand .logo { color: #D4A574; }
.footer-col { }
.footer-col h4 { color: #FFF; font-size: 1rem; margin-bottom: 16px; font-weight: 700; letter-spacing: 1px; }
.footer-col a { display: block; color: #C4A882; text-decoration: none; padding: 4px 0; font-size: 0.9rem; transition: 0.2s; }
.footer-col a:hover { color: #D4A574; padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); margin-top: 48px; padding-top: 24px; text-align: center; font-size: 0.85rem; color: #A08060; }

/* 工具类 */
.text-accent { color: #8B4513; }
.text-center { text-align: center; }
.seo-description { max-width: 600px; margin: 0 auto 48px; opacity: 0.7; color: #5C4033; line-height: 1.7; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* 响应式 */
@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: 72px; left: 0; width: 100%; background: rgba(255,248,240,0.98); padding: 24px; gap: 16px; border-bottom: 2px solid #E8D5C0; }
  .hero h1 { font-size: 2.2rem; }
  .hero::after { font-size: 12rem; }
  .section-title { font-size: 1.8rem; }
  .cta-banner h2 { font-size: 1.6rem; }
}
@media (max-width: 480px) {
  .cards-grid, .content-wall, .stats-bar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; }
  .hero h1 { font-size: 1.8rem; }
  .hero::after { display: none; }
  .stat-number { font-size: 2rem; }
}