/* 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:#0a0a0a; color:#e0e0e0; }

/* 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:#111; }

/* 导航 — 固定顶部 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(10,10,10,0.92); backdrop-filter:blur(16px); border-bottom:1px solid rgba(255,215,0,0.15); }
.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:8px; font-weight:800; font-size:1.4rem; text-decoration:none; color:#ffd700; letter-spacing:-0.5px; }
.logo-icon { width:40px; height:40px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:1.2rem; background:linear-gradient(135deg,#ffd700,#ff8c00); color:#0a0a0a; font-weight:900; }
.main-nav { display:flex; align-items:center; gap:32px; list-style:none; }
.main-nav a { text-decoration:none; font-size:0.85rem; font-weight:500; color:#aaa; transition:0.3s; letter-spacing:0.5px; position:relative; }
.main-nav a:hover { color:#ffd700; }
.main-nav a::after { content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:#ffd700; transition:0.3s; }
.main-nav a:hover::after { width:100%; }
.nav-cta { padding:10px 24px; border-radius:50px; color:#0a0a0a!important; font-weight:700; background:linear-gradient(135deg,#ffd700,#ff8c00); }
.nav-cta:hover { transform:scale(1.05); box-shadow:0 0 30px rgba(255,215,0,0.3); }
.menu-toggle { display:none; background:none; border:none; color:#ffd700; font-size:1.5rem; cursor:pointer; }

/* 首页Hero */
.hero { min-height:80vh; display:flex; align-items:center; position:relative; overflow:hidden; }
.hero::before { content:''; position:absolute; top:-50%; left:-50%; width:200%; height:200%; background:radial-gradient(circle at 30% 50%, rgba(255,215,0,0.08) 0%, transparent 50%); animation:heroGlow 8s ease-in-out infinite; }
@keyframes heroGlow { 0%,100% { transform:translate(0,0); } 50% { transform:translate(10%,10%); } }
.hero-content { max-width:720px; position:relative; z-index:1; }
.hero-eyebrow { display:inline-block; font-size:0.75rem; font-weight:700; padding:6px 18px; border-radius:50px; margin-bottom:20px; background:rgba(255,215,0,0.12); color:#ffd700; letter-spacing:2px; text-transform:uppercase; border:1px solid rgba(255,215,0,0.2); }
.hero h1 { font-size:3.2rem; line-height:1.1; margin-bottom:20px; color:#fff; font-weight:800; letter-spacing:-1px; text-shadow:0 4px 40px rgba(255,215,0,0.1); }
.hero p { font-size:1.1rem; opacity:0.6; max-width:560px; margin-bottom:36px; line-height:1.7; color:#bbb; }
.hero-buttons { display:flex; gap:16px; }
.hero-image { border-radius:16px; overflow:hidden; box-shadow:0 20px 60px rgba(255,215,0,0.08); border:1px solid rgba(255,215,0,0.1); }

/* 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:0.9rem; letter-spacing:0.3px; }
.btn-primary { color:#0a0a0a; background:linear-gradient(135deg,#ffd700,#ff8c00); box-shadow:0 4px 20px rgba(255,215,0,0.2); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 40px rgba(255,215,0,0.3); }
.btn-outline { background:transparent; border:1.5px solid rgba(255,215,0,0.3); color:#ffd700; }
.btn-outline:hover { background:rgba(255,215,0,0.08); border-color:#ffd700; }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.7rem; font-weight:700; letter-spacing:3px; margin-bottom:16px; color:#ffd700; text-transform:uppercase; }
.section-title { font-size:2.4rem; margin-bottom:16px; color:#fff; font-weight:800; letter-spacing:-0.5px; }
.section-desc { max-width:600px; opacity:0.5; margin-bottom:48px; font-size:1.05rem; line-height:1.6; }

/* 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(255,215,0,0.08); 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,#ff8c00); transform:scaleX(0); transform-origin:left; transition:0.4s; }
.category-card:hover { transform:translateY(-6px); border-color:rgba(255,215,0,0.2); box-shadow:0 12px 40px rgba(0,0,0,0.3); background:rgba(255,215,0,0.03); }
.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: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; transition:0.3s; }
.card-link:hover { gap:12px; }

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.feature-image { border-radius:16px; overflow:hidden; border:1px solid rgba(255,215,0,0.08); box-shadow:0 20px 60px rgba(0,0,0,0.2); }
.feature-image img { width:100%; height:auto; transition:0.6s; filter:grayscale(0.2); }
.feature-image:hover img { transform:scale(1.02); filter:grayscale(0); }
.feature-text { }
.feature-list { list-style:none; }
.feature-list li { padding:10px 0; display:flex; align-items:center; gap:12px; font-size:0.95rem; color:#ccc; border-bottom:1px solid rgba(255,255,255,0.04); }
.feature-list li:last-child { border-bottom:none; }
.feature-list li::before { content:'✦'; font-weight:700; color:#ffd700; 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:32px 20px; border-radius:16px; border:1px solid rgba(255,215,0,0.08); background:rgba(255,255,255,0.02); transition:0.3s; }
.stat-item:hover { border-color:rgba(255,215,0,0.2); transform:translateY(-4px); }
.stat-number { font-size:2.6rem; font-weight:800; color:#ffd700; letter-spacing:-1px; }
.stat-label { font-size:0.85rem; opacity:0.5; margin-top:8px; letter-spacing:0.5px; }

/* 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(255,215,0,0.08); 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(0,0,0,0.3); }
.content-wall-item img { width:100%; height:200px; object-fit:cover; filter:grayscale(0.3); transition:0.4s; }
.content-wall-item:hover img { filter:grayscale(0); transform:scale(1.03); }
.content-wall-body { padding:24px; }
.content-wall-body h3 { color:#fff; font-size:1.1rem; margin-bottom:8px; }
.content-wall-body p { opacity:0.5; font-size:0.85rem; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid rgba(255,215,0,0.08); border-radius:12px; 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:18px 24px; font-weight:600; display:flex; justify-content:space-between; color:#fff; font-size:1rem; }
.faq-item .faq-question::after { content:'+'; font-size:1.2rem; color:#ffd700; transition:0.3s; }
.faq-item.open .faq-question::after { transform:rotate(45deg); }
.faq-item .faq-answer { padding:0 24px 18px; display:none; opacity:0.6; line-height:1.7; font-size:0.9rem; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { padding:64px 24px; text-align:center; border-radius:16px; color:#0a0a0a; background:linear-gradient(135deg,#ffd700,#ff8c00); position:relative; overflow:hidden; }
.cta-banner::before { content:''; position:absolute; top:-50%; left:-50%; width:200%; height:200%; background:radial-gradient(circle at 50% 50%, rgba(255,255,255,0.2) 0%, transparent 50%); animation:ctaPulse 6s ease-in-out infinite; }
@keyframes ctaPulse { 0%,100% { transform:scale(1); } 50% { transform:scale(1.1); } }
.cta-banner h2 { color:#0a0a0a; font-size:2.2rem; position:relative; z-index:1; }
.cta-banner p { color:rgba(0,0,0,0.6); position:relative; z-index:1; }
.cta-banner .btn-primary { background:#0a0a0a; color:#ffd700; box-shadow:0 4px 20px rgba(0,0,0,0.2); }

/* 页脚 */
.site-footer { padding:64px 0 32px; background:#080808; border-top:1px solid rgba(255,215,0,0.05); }
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; }
.footer-brand { }
.footer-brand .logo { margin-bottom:16px; }
.footer-brand p { opacity:0.4; font-size:0.85rem; line-height:1.6; }
.footer-col { }
.footer-col h4 { color:#fff; font-size:0.9rem; margin-bottom:16px; font-weight:700; letter-spacing:0.5px; }
.footer-col a { display:block; color:#888; text-decoration:none; padding:6px 0; font-size:0.85rem; transition:0.3s; }
.footer-col a:hover { color:#ffd700; padding-left:4px; }
.footer-bottom { border-top:1px solid rgba(255,215,0,0.06); margin-top:48px; padding-top:24px; text-align:center; font-size:0.8rem; opacity:0.3; letter-spacing:0.5px; }

/* 工具类 */
.text-accent { color:#ffd700; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.4; font-size:0.95rem; line-height:1.6; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 滚动条美化 */
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:#0a0a0a; }
::-webkit-scrollbar-thumb { background:#ffd700; border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:#ff8c00; }

/* 选中文本 */
::selection { background:rgba(255,215,0,0.3); color:#fff; }

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .hero h1 { font-size:2.2rem; }
  .hero { min-height:60vh; }
  .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:68px; left:0; width:100%; background:#0a0a0a; padding:24px; border-bottom:1px solid rgba(255,215,0,0.1); }
  .main-nav.open a { padding:12px 0; }
  .hero-buttons { flex-direction:column; }
  .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 h1 { font-size:1.8rem; }
  .section-title { font-size:1.5rem; }
  .stat-number { font-size:2rem; }
  .container { padding:0 16px; }
}