/* 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: #0a0a0f; color: #e8e6e3; }

/* 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: #12121a; }

/* 导航 — 固定顶部 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(10,10,15,0.92); backdrop-filter:blur(16px) saturate(1.4); border-bottom:1px solid rgba(255,215,0,0.15); }
.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:12px; font-weight:800; font-size:1.4rem; text-decoration:none; color:#ffd700; letter-spacing:-0.5px; }
.logo-icon { width:40px; height:40px; border-radius:12px; display:flex; align-items:center; justify-content:center; font-size:1.2rem; background: linear-gradient(135deg, #ffd700, #ff8c00); color:#0a0a0f; font-weight:900; }
.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; transition:0.3s; color: rgba(232,230,227,0.7); letter-spacing:0.3px; position: relative; }
.main-nav a::after { content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:#ffd700; transition:0.3s; }
.main-nav a:hover { color:#ffd700; }
.main-nav a:hover::after { width:100%; }
.nav-cta { padding:10px 24px; border-radius:100px; color:#0a0a0f!important; font-weight:700; background: linear-gradient(135deg, #ffd700, #ff8c00); box-shadow:0 4px 20px rgba(255,215,0,0.3); }
.nav-cta::after { display:none!important; }
.menu-toggle { display:none; background:none; border:none; color:#ffd700; font-size:1.5rem; cursor:pointer; padding:8px; }

/* 首页Hero */
.hero { min-height:80vh; display:flex; align-items:center; position: relative; overflow: hidden; }
.hero::before { content:''; position:absolute; top:-30%; right:-20%; width:600px; height:600px; background: radial-gradient(circle, rgba(255,215,0,0.08), transparent 70%); pointer-events:none; }
.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:100px; margin-bottom:20px; background: rgba(255,215,0,0.12); color:#ffd700; letter-spacing:1.5px; text-transform:uppercase; border:1px solid rgba(255,215,0,0.2); }
.hero h1 { font-size:3.6rem; line-height:1.1; margin-bottom:24px; font-weight:800; letter-spacing:-1.5px; background: linear-gradient(135deg, #ffd700 30%, #ff8c00 70%, #ffd700); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.hero p { font-size:1.15rem; opacity:0.6; max-width:560px; margin-bottom:36px; line-height:1.7; color: #a8a6a3; }
.hero-buttons { display:flex; gap:14px; }
.hero-image { border-radius:16px; overflow:hidden; box-shadow:0 20px 60px rgba(255,215,0,0.08); }
.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:100px; font-weight:700; cursor:pointer; border:none; text-decoration:none; transition:0.3s; font-size:0.95rem; letter-spacing:0.3px; }
.btn-primary { color:#0a0a0f; background: linear-gradient(135deg, #ffd700, #ff8c00); box-shadow:0 4px 20px rgba(255,215,0,0.3); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(255,215,0,0.4); }
.btn-outline { background:transparent; border:1.5px solid rgba(255,215,0,0.4); color:#ffd700; }
.btn-outline:hover { border-color:#ffd700; background: rgba(255,215,0,0.06); }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.75rem; font-weight:700; letter-spacing:3px; margin-bottom:16px; color:#ffd700; text-transform:uppercase; }
.section-title { font-size:2.4rem; margin-bottom:16px; font-weight:800; letter-spacing:-1px; line-height:1.2; }
.section-desc { max-width:600px; opacity:0.5; margin-bottom:48px; line-height:1.7; color: #a8a6a3; }

/* 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; border:1px solid rgba(255,255,255,0.06); background: rgba(255,255,255,0.02); transition:0.4s; position: relative; overflow: hidden; }
.category-card::before { content:''; position:absolute; top:0; left:0; width:100%; height:3px; background: linear-gradient(90deg, #ffd700, transparent); opacity:0; transition:0.4s; }
.category-card:hover { transform:translateY(-6px); border-color: rgba(255,215,0,0.2); background: rgba(255,215,0,0.03); }
.category-card:hover::before { opacity:1; }
.card-icon { width:56px; height:56px; border-radius:14px; display:flex; align-items:center; justify-content:center; margin-bottom:20px; font-size:1.5rem; background: linear-gradient(135deg, rgba(255,215,0,0.12), rgba(255,140,0,0.08)); color:#ffd700; }
.card-link { font-weight:600; font-size:0.85rem; text-decoration:none; color:#ffd700; display:inline-flex; align-items:center; gap:6px; }
.card-link::after { content:'→'; transition:0.3s; }
.card-link:hover::after { transform:translateX(4px); }

/* 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 20px 60px rgba(0,0,0,0.4); }
.feature-image img { width:100%; height:auto; display:block; }
.feature-text { }
.feature-list { list-style:none; }
.feature-list li { padding:10px 0; display:flex; align-items:center; gap:12px; color: rgba(232,230,227,0.8); }
.feature-list li::before { content:'✦'; font-weight:700; color:#ffd700; 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 20px; border-radius:16px; border:1px solid rgba(255,255,255,0.06); background: rgba(255,255,255,0.02); }
.stat-number { font-size:2.6rem; font-weight:900; background: linear-gradient(135deg, #ffd700, #ff8c00); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.stat-label { font-size:0.9rem; opacity:0.5; margin-top:8px; color: #a8a6a3; }

/* 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; border:1px solid rgba(255,255,255,0.06); background: rgba(255,255,255,0.02); transition:0.4s; }
.content-wall-item:hover { transform:translateY(-6px); border-color: rgba(255,215,0,0.2); box-shadow:0 12px 40px rgba(255,215,0,0.06); }
.content-wall-item img { width:100%; height:220px; object-fit:cover; }
.content-wall-body { padding:24px; }
.content-wall-body h3 { font-size:1.15rem; margin-bottom:8px; }
.content-wall-body p { opacity:0.5; font-size:0.9rem; line-height:1.6; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid rgba(255,255,255,0.06); border-radius:14px; margin-bottom:10px; overflow:hidden; cursor:pointer; background: rgba(255,255,255,0.02); transition:0.3s; }
.faq-item:hover { border-color: rgba(255,215,0,0.15); }
.faq-item .faq-question { padding:20px 24px; font-weight:600; display:flex; justify-content:space-between; align-items:center; font-size:1rem; color: #e8e6e3; }
.faq-item .faq-question::after { content:'+'; font-size:1.3rem; color:#ffd700; transition:0.3s; }
.faq-item.open .faq-question::after { content:'−'; }
.faq-item .faq-answer { padding:0 24px 20px; display:none; opacity:0.6; line-height:1.7; color: #a8a6a3; }
.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, #1a1a2e 0%, #0a0a0f 100%); border:1px solid rgba(255,215,0,0.1); position: relative; overflow: hidden; }
.cta-banner::before { content:''; position:absolute; top:-50%; left:-20%; width:500px; height:500px; background: radial-gradient(circle, rgba(255,215,0,0.06), transparent 70%); pointer-events:none; }
.cta-banner h2 { color:#ffd700; font-size:2.2rem; margin-bottom:16px; }
.cta-banner p { color: rgba(232,230,227,0.6); margin-bottom:28px; }
.cta-banner .btn-primary { background:#ffd700; color:#0a0a0f; box-shadow:0 4px 20px rgba(255,215,0,0.3); }

/* 页脚 */
.site-footer { padding:64px 0 32px; border-top:1px solid rgba(255,255,255,0.04); }
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; }
.footer-brand { }
.footer-brand p { opacity:0.4; line-height:1.7; margin-top:16px; color: #a8a6a3; }
.footer-col h4 { color:#ffd700; font-size:0.9rem; margin-bottom:20px; font-weight:700; letter-spacing:1px; text-transform:uppercase; }
.footer-col a { display:block; color: rgba(232,230,227,0.5); text-decoration:none; padding:6px 0; font-size:0.9rem; transition:0.3s; }
.footer-col a:hover { color:#ffd700; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.04); margin-top:48px; padding-top:24px; text-align:center; font-size:0.85rem; color: rgba(232,230,227,0.3); }

/* 工具类 */
.text-accent { color:#ffd700; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.4; color: #a8a6a3; line-height:1.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .hero h1 { font-size:2.4rem; }
  .section-title { font-size:1.8rem; }
  .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:#0a0a0f; padding:24px; gap:16px; border-bottom:1px solid rgba(255,215,0,0.1); }
  .main-nav.open a { padding:8px 0; }
  .hero::before { width:300px; height:300px; }
}
@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:2rem; }
  .section-title { font-size:1.5rem; }
  .cta-banner { padding:40px 20px; }
}