/* 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: #F9F7FC; color: #1E1B4B; }

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; }
.section:nth-child(even) { background: linear-gradient(135deg, #FDF2F8 0%, #E9D5FF 100%); }

/* 导航 — 固定顶部 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background: rgba(255,255,255,0.7); backdrop-filter:blur(16px) saturate(180%); border-bottom: 1px solid rgba(139, 92, 246, 0.1); }
.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:8px; font-weight:800; font-size:1.3rem; text-decoration:none; color: #7C3AED; letter-spacing: -0.5px; }
.logo-icon { width:36px; height:36px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:1rem; background: linear-gradient(135deg, #8B5CF6, #EC4899); color: #fff; font-weight:700; }
.main-nav { display:flex; align-items:center; gap:24px; list-style:none; }
.main-nav a { text-decoration:none; font-size:0.9rem; font-weight:500; transition:0.2s; color: #4C1D95; padding: 6px 0; border-bottom: 2px solid transparent; }
.main-nav a:hover { color: #7C3AED; border-bottom-color: #8B5CF6; }
.nav-cta { padding:8px 24px; border-radius:50px; color:#fff!important; font-weight:600; background: linear-gradient(135deg, #8B5CF6, #EC4899); border: none !important; box-shadow: 0 4px 14px rgba(139, 92, 246, 0.3); }
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4); }
.menu-toggle { display:none; background: none; border: none; cursor:pointer; color: #7C3AED; font-size:1.5rem; padding: 8px; }

/* 首页Hero */
.hero { min-height:70vh; display:flex; align-items:center; background: linear-gradient(135deg, #F3E8FF 0%, #FBE9F0 100%); padding: 120px 0 80px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -30%; right: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(139,92,246,0.15) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
.hero::after { content: '1'; position: absolute; bottom: 10%; left: 5%; font-size: 30vw; font-weight: 900; color: rgba(139,92,246,0.04); line-height: 1; pointer-events: none; }
.hero-content { max-width:720px; position: relative; z-index: 1; }
.hero-eyebrow { display:inline-block; font-size:0.85rem; font-weight:700; padding:6px 16px; border-radius:50px; margin-bottom:16px; background: linear-gradient(135deg, #8B5CF6, #EC4899); color: #fff; letter-spacing: 1px; }
.hero h1 { font-size:3rem; line-height:1.15; margin-bottom:20px; font-weight: 900; background: linear-gradient(135deg, #4C1D95, #8B5CF6, #EC4899); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -1px; }
.hero p { font-size:1.1rem; opacity:0.8; max-width:560px; margin-bottom:32px; color: #4C1D95; font-weight: 400; }
.hero-buttons { display:flex; gap:14px; }
.hero-image { border-radius:16px; overflow:hidden; box-shadow: 0 20px 40px rgba(139,92,246,0.15); }
.hero-image img { width:100%; height:auto; display: block; }

/* 按钮 */
.btn { display:inline-flex; align-items:center; gap:8px; padding:14px 32px; border-radius:50px; font-weight:700; cursor:pointer; border:none; text-decoration:none; transition:0.25s; font-size:0.95rem; }
.btn-primary { color:#fff; background: linear-gradient(135deg, #8B5CF6, #EC4899); box-shadow: 0 4px 14px rgba(139,92,246,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(139,92,246,0.4); }
.btn-outline { background:transparent; border:2px solid #8B5CF6; color: #7C3AED; }
.btn-outline:hover { background: rgba(139,92,246,0.08); border-color: #7C3AED; }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.8rem; font-weight:700; letter-spacing:3px; margin-bottom:12px; text-transform: uppercase; color: #8B5CF6; }
.section-title { font-size:2.2rem; margin-bottom:14px; font-weight: 800; color: #1E1B4B; line-height: 1.2; }
.section-desc { max-width:600px; opacity:0.7; margin-bottom:40px; color: #4C1D95; font-size: 1.05rem; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:28px; }
.category-card { border-radius:16px; padding:32px 28px; border: 1px solid rgba(139,92,246,0.1); background: rgba(255,255,255,0.8); backdrop-filter: blur(8px); transition:0.3s; }
.category-card:hover { transform:translateY(-6px); box-shadow:0 12px 40px rgba(139,92,246,0.15); border-color: rgba(139,92,246,0.2); }
.card-icon { width:52px; height:52px; border-radius:12px; display:flex; align-items:center; justify-content:center; margin-bottom:18px; font-size:1.5rem; background: linear-gradient(135deg, #E9D5FF, #FCE7F3); color: #7C3AED; }
.card-link { font-weight:700; font-size:0.85rem; text-decoration:none; color: #8B5CF6; display: inline-flex; align-items: center; gap: 4px; }
.card-link::after { content: '→'; transition: transform 0.2s; }
.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:16px; overflow:hidden; box-shadow: 0 12px 28px rgba(139,92,246,0.12); }
.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; font-weight: 500; }
.feature-list li::before { content:'✓'; font-weight:700; color: #8B5CF6; background: #EDE9FE; display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; border-radius: 50%; font-size: 0.8rem; }

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item { padding:28px 16px; border-radius:16px; border:1px solid rgba(139,92,246,0.12); background: rgba(255,255,255,0.6); backdrop-filter: blur(6px); }
.stat-number { font-size:2.6rem; font-weight:900; background: linear-gradient(135deg, #8B5CF6, #EC4899); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:6px; color: #4C1D95; font-weight: 500; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:28px; }
.content-wall-item { border-radius:16px; overflow:hidden; border:1px solid rgba(139,92,246,0.1); background: #fff; transition:0.3s; }
.content-wall-item:hover { transform:translateY(-6px); box-shadow:0 12px 32px rgba(139,92,246,0.12); }
.content-wall-item img { width:100%; height:200px; object-fit:cover; }
.content-wall-body { padding:24px; }
.content-wall-body h4 { font-weight: 700; margin-bottom: 8px; color: #1E1B4B; }
.content-wall-body p { color: #4C1D95; opacity: 0.7; font-size: 0.9rem; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid rgba(139,92,246,0.15); border-radius:12px; margin-bottom:10px; overflow:hidden; cursor:pointer; background: rgba(255,255,255,0.7); backdrop-filter: blur(4px); transition: 0.2s; }
.faq-item:hover { border-color: rgba(139,92,246,0.3); }
.faq-item .faq-question { padding:18px 22px; font-weight:700; display:flex; justify-content:space-between; color: #1E1B4B; }
.faq-item .faq-question::after { content: '+'; font-size: 1.2rem; transition: transform 0.2s; color: #8B5CF6; }
.faq-item.open .faq-question::after { content: '−'; }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:0.8; color: #4C1D95; line-height: 1.6; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { padding:64px 28px; text-align:center; border-radius:20px; background: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%); color:#fff; box-shadow: 0 16px 40px rgba(139,92,246,0.3); }
.cta-banner h2 { color:#fff; font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; font-size: 1.1rem; }
.cta-banner .btn-primary { background: #fff; color: #7C3AED; box-shadow: 0 4px 14px rgba(255,255,255,0.3); }
.cta-banner .btn-primary:hover { background: #F3E8FF; }

/* 页脚 */
.site-footer { padding:60px 0 28px; background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%); color: rgba(255,255,255,0.8); }
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand { }
.footer-brand .logo { color: #fff; }
.footer-col h5 { font-weight: 700; color: #fff; margin-bottom: 16px; font-size: 1rem; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); text-decoration: none; padding: 4px 0; font-size: 0.9rem; transition: 0.2s; }
.footer-col a:hover { color: #C4B5FD; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.1); margin-top:40px; padding-top:20px; text-align:center; font-size:0.85rem; color: rgba(255,255,255,0.4); }

/* 工具类 */
.text-accent { color: #8B5CF6; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; color: #4C1D95; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap: 32px; }
  .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; align-items: center; justify-content: center; }
  .main-nav.open { display:flex; flex-direction:column; position:absolute; top:68px; left:0; width:100%; background: rgba(255,255,255,0.95); backdrop-filter: blur(16px); padding:20px; gap:16px; border-bottom: 1px solid rgba(139,92,246,0.1); }
  .hero h1 { font-size: 2.2rem; }
}
@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; }
  .section-title { font-size: 1.6rem; }
}