*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
body { font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif; overflow-x:hidden; background:#0a0b0f; color:#e8e6e3; line-height:1.6; }

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:100px 0; position:relative; }
.section:nth-child(even) { background:#11141c; }

/* 导航 — 固定顶部 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(10,11,15,0.85); backdrop-filter:blur(16px) saturate(180%); border-bottom:1px solid rgba(255,255,255,0.06); }
.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:#e8e6e3; 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,#f7931a,#ffb347); color:#0a0b0f; 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:rgba(232,230,227,0.6); transition:0.3s ease; letter-spacing:0.3px; position:relative; }
.main-nav a:hover { color:#f7931a; }
.main-nav a::after { content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:#f7931a; transition:0.3s ease; }
.main-nav a:hover::after { width:100%; }
.nav-cta { padding:10px 24px; border-radius:100px; color:#0a0b0f!important; font-weight:700; background:linear-gradient(135deg,#f7931a,#ffb347); font-size:0.8rem!important; letter-spacing:0.5px; text-transform:uppercase; }
.nav-cta::after { display:none!important; }
.nav-cta:hover { transform:scale(1.04); box-shadow:0 8px 24px rgba(247,147,26,0.3); }
.menu-toggle { display:none; background:none; border:none; color:#e8e6e3; font-size:1.5rem; cursor:pointer; padding:8px; }

/* 首页Hero */
.hero { min-height:85vh; display:flex; align-items:center; position:relative; overflow:hidden; }
.hero::before { content:''; position:absolute; top:-40%; right:-20%; width:600px; height:600px; background:radial-gradient(circle,rgba(247,147,26,0.12) 0%,transparent 70%); pointer-events:none; }
.hero-content { max-width:720px; position:relative; }
.hero-eyebrow { display:inline-block; font-size:0.7rem; font-weight:700; letter-spacing:3px; padding:6px 18px; border-radius:100px; margin-bottom:20px; background:rgba(247,147,26,0.12); color:#f7931a; text-transform:uppercase; border:1px solid rgba(247,147,26,0.15); }
.hero h1 { font-size:3.6rem; line-height:1.08; margin-bottom:24px; font-weight:900; letter-spacing:-1.5px; background:linear-gradient(180deg,#fff 30%,#f7931a 100%); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.hero p { font-size:1.1rem; opacity:0.5; max-width:520px; margin-bottom:40px; font-weight:400; letter-spacing:0.2px; line-height:1.7; }
.hero-buttons { display:flex; gap:16px; }
.hero-image { border-radius:20px; overflow:hidden; position:relative; }
.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 cubic-bezier(0.25,0.46,0.45,0.94); font-size:0.85rem; letter-spacing:0.3px; }
.btn-primary { color:#0a0b0f; background:linear-gradient(135deg,#f7931a,#ffb347); box-shadow:0 4px 20px rgba(247,147,26,0.2); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 32px rgba(247,147,26,0.35); }
.btn-outline { background:transparent; border:1.5px solid rgba(232,230,227,0.15); color:#e8e6e3; }
.btn-outline:hover { border-color:#f7931a; color:#f7931a; transform:translateY(-2px); }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.65rem; font-weight:700; letter-spacing:4px; margin-bottom:16px; color:#f7931a; text-transform:uppercase; }
.section-title { font-size:2.4rem; margin-bottom:16px; font-weight:800; letter-spacing:-0.8px; line-height:1.15; }
.section-desc { max-width:560px; opacity:0.5; margin-bottom:48px; font-size:1rem; line-height:1.7; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:20px; }
.category-card { border-radius:16px; padding:32px; background:rgba(255,255,255,0.03); border:1px solid rgba(255,255,255,0.06); transition:0.4s cubic-bezier(0.25,0.46,0.45,0.94); }
.category-card:hover { transform:translateY(-6px); background:rgba(247,147,26,0.06); border-color:rgba(247,147,26,0.15); box-shadow:0 20px 48px rgba(0,0,0,0.3); }
.card-icon { width:52px; height:52px; border-radius:14px; display:flex; align-items:center; justify-content:center; margin-bottom:20px; font-size:1.4rem; background:rgba(247,147,26,0.1); color:#f7931a; }
.card-link { font-weight:600; font-size:0.8rem; text-decoration:none; color:#f7931a; display:inline-flex; align-items:center; gap:6px; margin-top:12px; }
.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:20px; overflow:hidden; position:relative; }
.feature-image::after { content:''; position:absolute; inset:0; border-radius:20px; border:1px solid rgba(255,255,255,0.04); }
.feature-image img { width:100%; height:auto; display:block; }
.feature-text { }
.feature-list { list-style:none; margin-top:8px; }
.feature-list li { padding:10px 0; display:flex; align-items:center; gap:12px; font-size:0.95rem; opacity:0.75; }
.feature-list li::before { content:'✦'; font-weight:700; color:#f7931a; font-size:0.7rem; }

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; text-align:center; }
.stat-item { padding:32px 20px; border-radius:16px; background:rgba(255,255,255,0.02); border:1px solid rgba(255,255,255,0.06); }
.stat-number { font-size:2.8rem; font-weight:900; letter-spacing:-1px; background:linear-gradient(135deg,#fff,#f7931a); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.stat-label { font-size:0.85rem; opacity:0.4; margin-top:8px; letter-spacing:0.5px; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:20px; }
.content-wall-item { border-radius:16px; overflow:hidden; background:rgba(255,255,255,0.02); border:1px solid rgba(255,255,255,0.06); transition:0.4s cubic-bezier(0.25,0.46,0.45,0.94); }
.content-wall-item:hover { transform:translateY(-6px); background:rgba(247,147,26,0.04); border-color:rgba(247,147,26,0.1); box-shadow:0 20px 48px rgba(0,0,0,0.3); }
.content-wall-item img { width:100%; height:220px; object-fit:cover; display:block; }
.content-wall-body { padding:24px; }
.content-wall-body h3 { font-size:1.1rem; margin-bottom:8px; font-weight:700; }
.content-wall-body p { opacity:0.5; font-size:0.85rem; 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:12px; margin-bottom:8px; overflow:hidden; cursor:pointer; background:rgba(255,255,255,0.02); transition:0.3s ease; }
.faq-item:hover { border-color:rgba(247,147,26,0.15); }
.faq-item .faq-question { padding:18px 24px; font-weight:600; display:flex; justify-content:space-between; align-items:center; font-size:0.95rem; }
.faq-item .faq-question::after { content:'+'; font-size:1.2rem; color:#f7931a; transition:0.3s ease; }
.faq-item.open .faq-question::after { content:'−'; }
.faq-item .faq-answer { padding:0 24px 20px; display:none; opacity:0.6; font-size:0.9rem; line-height:1.7; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { padding:72px 24px; text-align:center; border-radius:20px; background:linear-gradient(135deg,#f7931a 0%,#ff8c00 50%,#ffb347 100%); position:relative; overflow:hidden; }
.cta-banner::before { content:''; position:absolute; top:-50%; left:-50%; width:200%; height:200%; background:radial-gradient(circle,rgba(255,255,255,0.1) 0%,transparent 60%); pointer-events:none; }
.cta-banner h2 { color:#0a0b0f; font-size:2.2rem; font-weight:900; letter-spacing:-0.8px; }
.cta-banner p { color:rgba(10,11,15,0.6); max-width:480px; margin:12px auto 32px; }
.cta-banner .btn-primary { background:#0a0b0f; color:#fff; box-shadow:0 8px 24px rgba(0,0,0,0.2); }
.cta-banner .btn-primary:hover { transform:translateY(-2px); box-shadow:0 12px 32px rgba(0,0,0,0.3); }

/* 页脚 */
.site-footer { padding:72px 0 32px; background:#0d0f15; border-top:1px solid rgba(255,255,255,0.04); }
.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:1.7; max-width:280px; }
.footer-col { }
.footer-col h4 { font-size:0.75rem; font-weight:700; text-transform:uppercase; letter-spacing:2px; margin-bottom:20px; color:rgba(232,230,227,0.3); }
.footer-col a { display:block; padding:6px 0; text-decoration:none; color:rgba(232,230,227,0.5); font-size:0.85rem; transition:0.2s ease; }
.footer-col a:hover { color:#f7931a; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.04); 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:#f7931a; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.5; font-size:0.95rem; 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:#0d0f15; padding:24px; gap:16px; border-bottom:1px solid rgba(255,255,255,0.06); }
  .main-nav.open a { padding:8px 0; }
  .hero h1 { font-size:2.4rem; }
  .section-title { font-size:1.8rem; }
  .hero { min-height:70vh; }
  .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:2rem; }
  .section-title { font-size:1.5rem; }
  .stat-number { font-size:2rem; }
  .hero { min-height:60vh; }
  .section { padding:60px 0; }
}