*, *::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:#0b0d1a; color:#e8e9f3; }

/* 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:#11142b; }

/* 导航 — 固定顶部 野兽派金属质感 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(11,13,26,0.92); backdrop-filter:blur(12px); border-bottom:2px solid #ff3a2f; }
.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:900; font-size:1.4rem; text-decoration:none; color:#ff3a2f; letter-spacing:-0.5px; }
.logo-icon { width:40px; height:40px; border-radius:4px; background:#ff3a2f; color:#0b0d1a; display:flex; align-items:center; justify-content:center; font-size:1.2rem; font-weight:800; }
.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }
.main-nav a { text-decoration:none; font-size:0.85rem; font-weight:600; color:#e8e9f3; text-transform:uppercase; letter-spacing:1.5px; transition:0.2s; border-bottom:2px solid transparent; padding-bottom:4px; }
.main-nav a:hover { color:#ff3a2f; border-bottom-color:#ff3a2f; }
.nav-cta { padding:10px 24px; border-radius:2px; color:#0b0d1a!important; font-weight:700; background:#ff3a2f; border:none!important; text-transform:uppercase; letter-spacing:1px; }
.nav-cta:hover { background:#ff6055!important; color:#0b0d1a!important; border-bottom:none!important; }
.menu-toggle { display:none; background:none; border:2px solid #ff3a2f; color:#ff3a2f; padding:8px 14px; font-size:1.2rem; cursor:pointer; }

/* 首页Hero — 杂志风解构排版 */
.hero { min-height:80vh; display:flex; align-items:center; position:relative; overflow:hidden; }
.hero::before { content:''; position:absolute; top:-20%; right:-10%; width:500px; height:500px; background:radial-gradient(circle, rgba(255,58,47,0.15) 0%, transparent 70%); z-index:0; }
.hero-content { max-width:800px; position:relative; z-index:1; }
.hero-eyebrow { display:inline-block; font-size:0.7rem; font-weight:700; padding:6px 16px; border-radius:0; background:#ff3a2f; color:#0b0d1a; margin-bottom:20px; text-transform:uppercase; letter-spacing:3px; }
.hero h1 { font-size:3.8rem; line-height:1.05; margin-bottom:24px; font-weight:900; letter-spacing:-2px; text-transform:uppercase; }
.hero h1 span { color:#ff3a2f; }
.hero p { font-size:1.1rem; opacity:0.6; max-width:600px; margin-bottom:36px; font-weight:400; letter-spacing:0.3px; }
.hero-buttons { display:flex; gap:16px; }
.hero-image { border-radius:4px; overflow:hidden; border:2px solid #ff3a2f; }
.hero-image img { width:100%; height:auto; display:block; filter:grayscale(0.3); }

/* 按钮 — 粗野主义直角 */
.btn { display:inline-flex; align-items:center; gap:10px; padding:14px 32px; border-radius:2px; font-weight:700; cursor:pointer; border:none; text-decoration:none; transition:0.15s; text-transform:uppercase; letter-spacing:1.5px; font-size:0.8rem; }
.btn-primary { color:#0b0d1a; background:#ff3a2f; }
.btn-primary:hover { background:#ff6055; transform:scale(1.02); }
.btn-outline { background:transparent; border:2px solid #ff3a2f; color:#ff3a2f; }
.btn-outline:hover { background:#ff3a2f; color:#0b0d1a; }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.7rem; font-weight:700; letter-spacing:3px; margin-bottom:14px; color:#ff3a2f; text-transform:uppercase; }
.section-title { font-size:2.6rem; margin-bottom:16px; font-weight:900; letter-spacing:-1px; text-transform:uppercase; }
.section-desc { max-width:600px; opacity:0.55; margin-bottom:44px; font-size:1.05rem; }

/* 卡片网格 — 玻璃态 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:28px; }
.category-card { border-radius:4px; padding:32px; background:rgba(255,255,255,0.04); border:1px solid rgba(255,58,47,0.2); backdrop-filter:blur(8px); transition:0.25s; }
.category-card:hover { transform:translateY(-6px); background:rgba(255,58,47,0.08); border-color:#ff3a2f; box-shadow:0 8px 30px rgba(255,58,47,0.15); }
.card-icon { width:52px; height:52px; border-radius:4px; background:#ff3a2f; color:#0b0d1a; display:flex; align-items:center; justify-content:center; margin-bottom:20px; font-size:1.5rem; font-weight:800; }
.card-link { font-weight:700; font-size:0.75rem; text-decoration:none; color:#ff3a2f; text-transform:uppercase; letter-spacing:1px; }

/* 特性块 — 非对称网格 */
.feature-block { display:grid; grid-template-columns:1.2fr 0.8fr; gap:60px; align-items:center; }
.feature-image { border-radius:4px; overflow:hidden; border:2px solid rgba(255,58,47,0.3); }
.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:12px; font-weight:500; }
.feature-list li::before { content:'→'; font-weight:700; color:#ff3a2f; font-size:1.2rem; }

/* 数据条 — 大胆数字 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:28px; text-align:center; }
.stat-item { padding:28px 16px; border-radius:4px; background:rgba(255,58,47,0.06); border:1px solid rgba(255,58,47,0.15); }
.stat-number { font-size:3rem; font-weight:900; color:#ff3a2f; letter-spacing:-2px; }
.stat-label { font-size:0.85rem; opacity:0.5; margin-top:8px; text-transform:uppercase; letter-spacing:1px; }

/* 内容墙 — 杂志网格 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:28px; }
.content-wall-item { border-radius:4px; overflow:hidden; background:rgba(255,255,255,0.03); border:1px solid rgba(255,58,47,0.15); transition:0.25s; }
.content-wall-item:hover { transform:translateY(-5px); border-color:#ff3a2f; box-shadow:0 8px 24px rgba(255,58,47,0.12); }
.content-wall-item img { width:100%; height:220px; object-fit:cover; filter:grayscale(0.4); transition:0.3s; }
.content-wall-item:hover img { filter:grayscale(0); }
.content-wall-body { padding:24px; }

/* FAQ — 极简折叠 */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid rgba(255,58,47,0.2); border-radius:2px; margin-bottom:10px; overflow:hidden; cursor:pointer; background:rgba(255,255,255,0.02); }
.faq-item .faq-question { padding:18px 22px; font-weight:700; display:flex; justify-content:space-between; align-items:center; text-transform:uppercase; letter-spacing:0.5px; font-size:0.9rem; }
.faq-item .faq-question::after { content:'+'; font-size:1.4rem; color:#ff3a2f; transition:0.2s; }
.faq-item.open .faq-question::after { content:'−'; }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:0.6; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { padding:64px 24px; text-align:center; border-radius:4px; background:#ff3a2f; color:#0b0d1a; border:2px solid #ff3a2f; }
.cta-banner h2 { color:#0b0d1a; font-size:2.2rem; font-weight:900; text-transform:uppercase; }
.cta-banner .btn-primary { background:#0b0d1a; color:#ff3a2f; }
.cta-banner .btn-primary:hover { background:#1a1d33; }

/* 页脚 */
.site-footer { padding:64px 0 32px; border-top:2px solid #ff3a2f; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; }
.footer-brand { }
.footer-col { }
.footer-col h4 { font-size:0.8rem; font-weight:700; text-transform:uppercase; letter-spacing:2px; margin-bottom:16px; color:#ff3a2f; }
.footer-col a { display:block; color:#e8e9f3; text-decoration:none; font-size:0.9rem; opacity:0.5; padding:4px 0; transition:0.2s; }
.footer-col a:hover { opacity:1; color:#ff3a2f; }
.footer-bottom { border-top:1px solid rgba(255,58,47,0.15); margin-top:48px; padding-top:24px; text-align:center; font-size:0.8rem; opacity:0.4; text-transform:uppercase; letter-spacing:1px; }

/* 工具类 */
.text-accent { color:#ff3a2f; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.5; }
.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; }
  .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:#0b0d1a; padding:24px; border-bottom:2px solid #ff3a2f; gap:16px; }
  .hero h1 { font-size:2.5rem; }
  .section-title { font-size: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:2rem; }
  .stat-number { font-size:2.2rem; }
}