*, *::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:#f2f7fd; }

.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background: linear-gradient(135deg, #e8f0fe 0%, #f0f7ff 100%); }

/* 导航 — 水蓝磨砂 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(226, 240, 255, 0.92); backdrop-filter:blur(14px) saturate(1.2); border-bottom:1px solid rgba(58, 134, 255, 0.12); }
.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:10px; font-weight:800; font-size:1.3rem; text-decoration:none; color:#004e9e; letter-spacing:-0.3px; }
.logo-icon { width:38px; height:38px; border-radius:50%; background: linear-gradient(135deg, #3a86ff, #60a5fa); display:flex; align-items:center; justify-content:center; font-size:1.1rem; color:white; box-shadow:0 4px 12px rgba(58,134,255,0.3); }
.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }
.main-nav a { text-decoration:none; font-size:0.9rem; font-weight:500; color:#1a3a6b; transition:0.2s; position:relative; }
.main-nav a::after { content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:#3a86ff; transition:0.3s; border-radius:2px; }
.main-nav a:hover { color:#3a86ff; }
.main-nav a:hover::after { width:100%; }
.nav-cta { padding:8px 22px; border-radius:40px; color:#fff!important; font-weight:600; background: linear-gradient(135deg, #3a86ff, #1d4ed8); box-shadow:0 4px 14px rgba(58,134,255,0.35); transition:0.3s; }
.nav-cta:hover { transform:translateY(-2px); box-shadow:0 6px 20px rgba(58,134,255,0.45); }
.nav-cta::after { display:none!important; }
.menu-toggle { display:none; background:none; border:none; font-size:1.5rem; color:#004e9e; cursor:pointer; }

/* 首页Hero — 水彩晕染 */
.hero { min-height:75vh; display:flex; align-items:center; position:relative; background: linear-gradient(170deg, #d4e6ff 0%, #f2f7fd 50%, #e8f0fe 100%); overflow:hidden; }
.hero::before { content:''; position:absolute; top:-30%; right:-10%; width:500px; height:500px; background: radial-gradient(circle, rgba(58,134,255,0.08) 0%, transparent 70%); border-radius:50%; }
.hero::after { content:''; position:absolute; bottom:-20%; left:-5%; width:400px; height:400px; background: radial-gradient(circle, rgba(96,165,250,0.06) 0%, transparent 70%); border-radius:50%; }
.hero-content { max-width:720px; position:relative; z-index:2; }
.hero-eyebrow { display:inline-block; font-size:0.75rem; font-weight:700; padding:5px 16px; border-radius:40px; margin-bottom:18px; background: linear-gradient(135deg, #3a86ff22, #60a5fa22); color:#1d4ed8; border:1px solid rgba(58,134,255,0.2); letter-spacing:1px; text-transform:uppercase; }
.hero h1 { font-size:3rem; line-height:1.15; margin-bottom:18px; color:#003366; font-weight:800; letter-spacing:-0.5px; }
.hero h1 span { background: linear-gradient(135deg, #3a86ff, #1d4ed8); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hero p { font-size:1.1rem; opacity:0.65; max-width:560px; margin-bottom:34px; color:#1a3a6b; line-height:1.6; }
.hero-buttons { display:flex; gap:14px; }
.hero-image { border-radius:20px; overflow:hidden; box-shadow:0 20px 60px rgba(58,134,255,0.15); border:1px solid rgba(255,255,255,0.3); }
.hero-image img { width:100%; height:auto; display:block; }

/* 按钮 — 水蓝系 */
.btn { display:inline-flex; align-items:center; gap:8px; padding:12px 30px; border-radius:40px; font-weight:600; cursor:pointer; border:none; text-decoration:none; transition:0.3s; font-size:0.95rem; }
.btn-primary { color:#fff; background: linear-gradient(135deg, #3a86ff, #1d4ed8); box-shadow:0 4px 16px rgba(58,134,255,0.3); }
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 8px 28px rgba(58,134,255,0.4); }
.btn-outline { background:transparent; border:1.5px solid #3a86ff; color:#1d4ed8; }
.btn-outline:hover { background:rgba(58,134,255,0.08); transform:translateY(-2px); }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.7rem; font-weight:700; letter-spacing:3px; margin-bottom:12px; color:#3a86ff; text-transform:uppercase; }
.section-title { font-size:2.2rem; margin-bottom:14px; color:#003366; font-weight:700; letter-spacing:-0.3px; }
.section-desc { max-width:600px; opacity:0.65; margin-bottom:40px; color:#1a3a6b; line-height:1.6; }

/* 卡片网格 — 水波卡片 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:28px; }
.category-card { border-radius:16px; padding:30px; background:rgba(255,255,255,0.7); backdrop-filter:blur(8px); border:1px solid rgba(58,134,255,0.1); transition:0.35s; box-shadow:0 4px 20px rgba(58,134,255,0.05); }
.category-card:hover { transform:translateY(-6px); box-shadow:0 12px 40px rgba(58,134,255,0.12); border-color:rgba(58,134,255,0.2); }
.card-icon { width:50px; height:50px; border-radius:14px; background: linear-gradient(135deg, #d4e6ff, #e8f0fe); display:flex; align-items:center; justify-content:center; margin-bottom:18px; font-size:1.4rem; color:#1d4ed8; }
.category-card h3 { font-size:1.15rem; margin-bottom:8px; color:#003366; }
.category-card p { font-size:0.9rem; opacity:0.6; margin-bottom:16px; color:#1a3a6b; }
.card-link { font-weight:600; font-size:0.85rem; text-decoration:none; color:#3a86ff; display:inline-flex; align-items:center; gap:4px; transition:0.2s; }
.card-link:hover { gap:8px; color:#1d4ed8; }

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.feature-image { border-radius:20px; overflow:hidden; box-shadow:0 16px 48px rgba(58,134,255,0.12); border:1px solid rgba(255,255,255,0.3); }
.feature-image img { width:100%; height:auto; display:block; }
.feature-text h2 { font-size:1.8rem; color:#003366; margin-bottom:16px; }
.feature-text p { opacity:0.65; line-height:1.7; margin-bottom:20px; }
.feature-list { list-style:none; }
.feature-list li { padding:8px 0; display:flex; align-items:center; gap:10px; color:#1a3a6b; font-weight:500; }
.feature-list li::before { content:'✓'; font-weight:700; color:#3a86ff; font-size:1.1rem; }

/* 数据条 — 水光统计 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:28px; text-align:center; }
.stat-item { padding:28px 20px; border-radius:16px; background:rgba(255,255,255,0.6); backdrop-filter:blur(6px); border:1px solid rgba(58,134,255,0.08); box-shadow:0 4px 16px rgba(58,134,255,0.04); }
.stat-number { font-size:2.4rem; font-weight:800; color:#003366; background: linear-gradient(135deg, #3a86ff, #1d4ed8); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:8px; color:#1a3a6b; }

/* 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; background:rgba(255,255,255,0.7); backdrop-filter:blur(6px); border:1px solid rgba(58,134,255,0.08); transition:0.35s; box-shadow:0 4px 16px rgba(58,134,255,0.04); }
.content-wall-item:hover { transform:translateY(-6px); box-shadow:0 12px 40px rgba(58,134,255,0.12); border-color:rgba(58,134,255,0.15); }
.content-wall-item img { width:100%; height:200px; object-fit:cover; }
.content-wall-body { padding:22px; }
.content-wall-body h4 { font-size:1.1rem; color:#003366; margin-bottom:6px; }
.content-wall-body p { font-size:0.9rem; opacity:0.6; color:#1a3a6b; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid rgba(58,134,255,0.1); border-radius:14px; margin-bottom:10px; overflow:hidden; cursor:pointer; background:rgba(255,255,255,0.5); backdrop-filter:blur(4px); transition:0.2s; }
.faq-item:hover { border-color:rgba(58,134,255,0.2); }
.faq-item .faq-question { padding:18px 22px; font-weight:600; display:flex; justify-content:space-between; color:#003366; font-size:1rem; }
.faq-item .faq-question::after { content:'+'; font-size:1.3rem; color:#3a86ff; transition:0.3s; }
.faq-item.open .faq-question::after { content:'−'; }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:0.65; color:#1a3a6b; line-height:1.6; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 — 水蓝渐变 */
.cta-banner { padding:60px 24px; text-align:center; border-radius:20px; background: linear-gradient(135deg, #3a86ff, #1d4ed8, #0f3b8e); color:#fff; box-shadow:0 20px 60px rgba(58,134,255,0.25); position:relative; overflow:hidden; }
.cta-banner::before { content:''; position:absolute; top:-50%; left:-20%; width:600px; height:600px; background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%); border-radius:50%; }
.cta-banner h2 { color:#fff; font-size:2rem; margin-bottom:14px; }
.cta-banner p { opacity:0.85; margin-bottom:28px; }
.cta-banner .btn-primary { background:#fff; color:#1d4ed8; box-shadow:0 4px 20px rgba(0,0,0,0.1); }
.cta-banner .btn-primary:hover { transform:translateY(-3px); box-shadow:0 8px 30px rgba(0,0,0,0.15); }

/* 页脚 */
.site-footer { padding:56px 0 28px; background: linear-gradient(180deg, #e8f0fe, #d4e6ff); border-top:1px solid rgba(58,134,255,0.08); }
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand h3 { color:#003366; font-size:1.3rem; margin-bottom:12px; }
.footer-brand p { opacity:0.6; font-size:0.9rem; color:#1a3a6b; }
.footer-col h4 { color:#003366; font-size:0.95rem; margin-bottom:16px; font-weight:600; }
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:8px; }
.footer-col ul li a { text-decoration:none; color:#1a3a6b; opacity:0.7; font-size:0.9rem; transition:0.2s; }
.footer-col ul li a:hover { opacity:1; color:#3a86ff; }
.footer-bottom { border-top:1px solid rgba(58,134,255,0.1); margin-top:40px; padding-top:20px; text-align:center; font-size:0.85rem; color:#1a3a6b; opacity:0.6; }

/* 工具类 */
.text-accent { color:#3a86ff; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.65; color:#1a3a6b; line-height:1.6; }
.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); gap:20px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap:30px; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; align-items:center; justify-content:center; width:40px; height:40px; }
  .main-nav.open { display:flex; flex-direction:column; position:absolute; top:68px; left:0; width:100%; background:rgba(226,240,255,0.98); backdrop-filter:blur(14px); padding:24px 28px; gap:20px; border-bottom:1px solid rgba(58,134,255,0.12); }
  .hero h1 { font-size:2.2rem; }
  .hero { min-height:60vh; }
}
@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; gap:12px; }
  .hero h1 { font-size:1.8rem; }
  .section-title { font-size:1.6rem; }
  .stat-number { font-size:1.8rem; }
}