*, *::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: linear-gradient(135deg, #faf0f5, #eef3fa);
  color: #2d3436;
}

.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; }
.section:nth-child(even) { background: rgba(255,255,255,0.6); backdrop-filter: blur(4px); border-top: 1px solid rgba(255,255,255,0.8); border-bottom: 1px solid rgba(255,255,255,0.8); }

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background: rgba(255,255,255,0.7); 
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid rgba(255,255,255,0.3);
  box-shadow: 0 2px 20px rgba(255,107,107,0.08);
}
.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:700; font-size:1.2rem; text-decoration:none; color: #2d3436; }
.logo-icon { 
  width:36px; height:36px; border-radius:12px; display:flex; align-items:center; justify-content:center; font-size:1rem;
  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
  color: #fff;
  box-shadow: 0 2px 8px rgba(255,107,107,0.3);
}
.main-nav { display:flex; align-items:center; gap:24px; list-style:none; }
.main-nav a { text-decoration:none; font-size:0.9rem; font-weight:500; transition:0.2s; color: #555; }
.main-nav a:hover { color: #ff6b6b; }
.nav-cta { 
  padding:8px 20px; border-radius:50px; color:#fff!important; font-weight:600;
  background: linear-gradient(135deg, #4ecdc4, #44bd9e);
  box-shadow: 0 4px 12px rgba(78,205,196,0.3);
}
.menu-toggle { display:none; cursor: pointer; flex-direction: column; gap: 4px; background: none; border: none; padding: 8px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: #2d3436; border-radius: 2px; }

/* 首页Hero */
.hero { 
  min-height:70vh; display:flex; align-items:center; 
  background: radial-gradient(circle at 10% 30%, rgba(255,107,107,0.08) 0%, transparent 50%),
              radial-gradient(circle at 90% 70%, rgba(78,205,196,0.08) 0%, transparent 50%);
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50px; left: -50px; width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255,211,61,0.15) 0%, transparent 70%);
  z-index: 0;
  pointer-events: none;
}
.hero-content { max-width:720px; position: relative; z-index: 1; }
.hero-eyebrow { 
  display:inline-block; font-size:0.85rem; font-weight:600; padding:4px 14px; border-radius:20px; margin-bottom:16px;
  background: rgba(255,107,107,0.12);
  color: #ff6b6b;
  letter-spacing: 1px;
}
.hero h1 { 
  font-size:3.2rem; line-height:1.15; margin-bottom:20px; 
  font-weight: 800;
  background: linear-gradient(135deg, #2d3436, #4ecdc4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p { font-size:1.15rem; opacity:0.7; max-width:560px; margin-bottom:32px; color: #555; }
.hero-buttons { display:flex; gap:14px; }
.hero-image { border-radius:20px; overflow:hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.08); }
.hero-image img { width:100%; height:auto; display: block; }

/* 按钮 */
.btn { 
  display:inline-flex; align-items:center; gap:8px; padding:12px 28px; border-radius:50px; 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, #ff6b6b, #ee5a24); box-shadow: 0 4px 14px rgba(255,107,107,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255,107,107,0.4); }
.btn-outline { background:transparent; border:1.5px solid; color: #4ecdc4; border-color: #4ecdc4; }
.btn-outline:hover { background: rgba(78,205,196,0.08); }

/* 标签/标题 */
.section-label { 
  display:inline-block; font-size:0.75rem; font-weight:700; letter-spacing:3px; margin-bottom:12px; 
  color: #ff6b6b; text-transform: uppercase;
  border-left: 3px solid #ff6b6b; padding-left: 10px;
}
.section-title { font-size:2.2rem; margin-bottom:14px; font-weight: 800; line-height: 1.2; }
.section-desc { max-width:600px; opacity:0.7; margin-bottom:40px; color: #666; font-size: 1.05rem; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:24px; }
.category-card { 
  border-radius:20px; padding:28px; 
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.4);
  transition:0.3s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}
.category-card:hover { 
  transform:translateY(-6px); 
  box-shadow:0 12px 32px rgba(255,107,107,0.12), 0 4px 16px rgba(0,0,0,0.06);
  border-color: rgba(255,107,107,0.2);
}
.card-icon { 
  width:48px; height:48px; border-radius:16px; display:flex; align-items:center; justify-content:center; margin-bottom:16px; font-size:1.3rem;
  background: linear-gradient(135deg, rgba(78,205,196,0.15), rgba(255,211,61,0.15));
  color: #4ecdc4;
}
.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.card-desc { opacity: 0.6; font-size: 0.9rem; margin-bottom: 16px; }
.card-link { font-weight:600; font-size:0.85rem; text-decoration:none; color: #ff6b6b; display: inline-flex; align-items: center; gap: 4px; }
.card-link::after { content: '→'; transition: 0.2s; }
.card-link:hover::after { transform: translateX(4px); }

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; }
.feature-image { border-radius:20px; overflow:hidden; box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.feature-image img { width:100%; height:auto; display: block; }
.feature-text { }
.feature-list { list-style:none; }
.feature-list li { padding:6px 0; display:flex; align-items:center; gap:8px; font-size: 1rem; }
.feature-list li::before { content:'✓'; font-weight:700; color: #4ecdc4; }

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item { 
  padding:24px 16px; border-radius:20px; 
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.3);
  transition: 0.3s;
}
.stat-item:hover { background: rgba(255,255,255,0.8); }
.stat-number { font-size:2.4rem; font-weight:800; color: #ff6b6b; }
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:6px; color: #555; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:24px; }
.content-wall-item { 
  border-radius:20px; overflow:hidden; 
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.4);
  transition:0.3s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}
.content-wall-item:hover { transform:translateY(-4px); box-shadow:0 8px 24px rgba(78,205,196,0.12); }
.content-wall-item img { width:100%; height:200px; object-fit:cover; display: block; }
.content-wall-body { padding:20px; }
.content-wall-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; }
.content-wall-body p { opacity: 0.6; font-size: 0.9rem; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border: 1px solid rgba(255,255,255,0.3);
  border-radius:16px; margin-bottom:10px; overflow:hidden; cursor:pointer;
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(6px);
  transition: 0.3s;
}
.faq-item:hover { background: rgba(255,255,255,0.7); }
.faq-item .faq-question { padding:18px 22px; font-weight:600; display:flex; justify-content:space-between; color: #2d3436; }
.faq-item .faq-question::after { content: '+'; font-size: 1.2rem; color: #4ecdc4; transition: 0.3s; }
.faq-item.open .faq-question::after { content: '−'; }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:0.7; color: #555; line-height: 1.6; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:60px 24px; text-align:center; border-radius:24px; 
  background: linear-gradient(135deg, #ff6b6b, #ee5a24, #4ecdc4);
  color: #fff;
  box-shadow: 0 12px 40px rgba(255,107,107,0.2);
}
.cta-banner h2 { color:#fff; font-size: 2rem; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 28px; font-size: 1.05rem; }
.cta-banner .btn-primary { background:#fff; color: #ff6b6b; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }

/* 页脚 */
.site-footer { 
  padding:56px 0 28px; 
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255,255,255,0.3);
}
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand { }
.footer-brand h3 { font-size: 1.2rem; margin-bottom: 12px; }
.footer-brand p { opacity: 0.6; font-size: 0.9rem; max-width: 260px; }
.footer-col { }
.footer-col h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; color: #2d3436; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { text-decoration: none; color: #555; font-size: 0.9rem; transition: 0.2s; }
.footer-col ul li a:hover { color: #ff6b6b; }
.footer-bottom { border-top:1px solid rgba(0,0,0,0.06); margin-top:40px; padding-top:20px; text-align:center; font-size:0.85rem; color: #999; }

/* 工具类 */
.text-accent { color: #ff6b6b; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; color: #666; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; }
  .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:68px; left:0; width:100%; background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); padding:24px; gap: 16px; border-bottom: 1px solid rgba(0,0,0,0.05); }
  .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; text-align: center; }
  .hero-buttons { flex-direction:column; }
  .btn { width: 100%; justify-content: center; }
  .section-title { font-size: 1.8rem; }
}