/* 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:#f5f0eb; color:#2c3a4f; }

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background:linear-gradient(135deg, #e8e0d8 0%, #f5f0eb 50%, #e8e0d8 100%); }

/* 导航 — 固定顶部 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(245,240,235,0.92); backdrop-filter:blur(16px); border-bottom:2px solid #d4c5b8; }
.header-inner { display:flex; align-items:center; justify-content:space-between; height:72px; max-width:1200px; margin:0 auto; padding:0 32px; }
.logo { display:flex; align-items:center; gap:12px; font-weight:800; font-size:1.3rem; text-decoration:none; color:#2c3a4f; letter-spacing:-0.5px; }
.logo-icon { width:40px; height:40px; border-radius:50%; background:linear-gradient(135deg, #e67e22, #d35400); display:flex; align-items:center; justify-content:center; font-size:1.2rem; color:#fff; box-shadow:0 4px 12px rgba(230,126,34,0.3); }
.main-nav { display:flex; align-items:center; gap:32px; list-style:none; }
.main-nav a { text-decoration:none; font-size:0.9rem; font-weight:500; color:#5a4a3a; transition:0.3s; position:relative; letter-spacing:0.5px; }
.main-nav a::after { content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:#e67e22; transition:0.3s; }
.main-nav a:hover { color:#e67e22; }
.main-nav a:hover::after { width:100%; }
.nav-cta { padding:10px 24px; border-radius:50px; background:linear-gradient(135deg, #e67e22, #d35400); color:#fff!important; font-weight:700; box-shadow:0 4px 16px rgba(230,126,34,0.3); }
.nav-cta::after { display:none!important; }
.nav-cta:hover { transform:translateY(-2px); box-shadow:0 6px 20px rgba(230,126,34,0.4); }
.menu-toggle { display:none; background:none; border:none; font-size:1.5rem; color:#2c3a4f; cursor:pointer; padding:8px; }

/* 首页Hero */
.hero { min-height:75vh; display:flex; align-items:center; position:relative; overflow:hidden; background:linear-gradient(160deg, #f5f0eb 0%, #e8dcc8 40%, #f5f0eb 100%); }
.hero::before { content:''; position:absolute; top:-50%; left:-20%; width:70%; height:200%; background:radial-gradient(ellipse at center, rgba(230,126,34,0.08) 0%, transparent 70%); pointer-events:none; }
.hero-content { max-width:720px; position:relative; z-index:1; }
.hero-eyebrow { display:inline-block; font-size:0.8rem; font-weight:700; padding:6px 18px; border-radius:50px; background:rgba(230,126,34,0.12); color:#d35400; margin-bottom:20px; letter-spacing:1.5px; text-transform:uppercase; }
.hero h1 { font-size:3.2rem; line-height:1.15; margin-bottom:24px; font-weight:900; color:#1a2633; letter-spacing:-1px; }
.hero h1 span { background:linear-gradient(135deg, #e67e22, #d35400); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hero p { font-size:1.15rem; opacity:0.75; max-width:560px; margin-bottom:36px; line-height:1.6; color:#5a4a3a; }
.hero-buttons { display:flex; gap:16px; }
.hero-image { border-radius:20px; overflow:hidden; box-shadow:0 20px 60px 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:10px; padding:14px 32px; border-radius:50px; font-weight:700; cursor:pointer; border:none; text-decoration:none; transition:0.3s; font-size:0.95rem; letter-spacing:0.3px; }
.btn-primary { color:#fff; background:linear-gradient(135deg, #e67e22, #d35400); box-shadow:0 4px 16px rgba(230,126,34,0.25); }
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 8px 28px rgba(230,126,34,0.35); }
.btn-outline { background:transparent; border:2px solid #d4c5b8; color:#2c3a4f; }
.btn-outline:hover { border-color:#e67e22; color:#e67e22; transform:translateY(-2px); }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.75rem; font-weight:700; letter-spacing:3px; margin-bottom:14px; color:#d35400; text-transform:uppercase; }
.section-title { font-size:2.2rem; margin-bottom:16px; font-weight:800; color:#1a2633; letter-spacing:-0.5px; }
.section-desc { max-width:600px; opacity:0.7; margin-bottom:44px; line-height:1.7; color:#5a4a3a; }

/* 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; background:#fff; border:2px solid #e8dcc8; transition:0.4s; position:relative; overflow:hidden; }
.category-card::before { content:''; position:absolute; top:0; left:0; width:100%; height:4px; background:linear-gradient(90deg, #e67e22, #d35400); transform:scaleX(0); transform-origin:left; transition:0.4s; }
.category-card:hover { transform:translateY(-6px); box-shadow:0 12px 40px rgba(0,0,0,0.06); border-color:#d4c5b8; }
.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, #f5f0eb, #e8dcc8); color:#d35400; }
.category-card h3 { font-size:1.2rem; margin-bottom:10px; color:#1a2633; }
.category-card p { font-size:0.9rem; color:#5a4a3a; opacity:0.7; margin-bottom:16px; line-height:1.5; }
.card-link { font-weight:700; font-size:0.85rem; text-decoration:none; color:#e67e22; display:inline-flex; align-items:center; gap:6px; transition:0.3s; }
.card-link:hover { gap:12px; color:#d35400; }

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.feature-image { border-radius:20px; overflow:hidden; box-shadow:0 20px 60px rgba(0,0,0,0.06); }
.feature-image img { width:100%; height:auto; display:block; }
.feature-text { }
.feature-text .section-title { margin-bottom:20px; }
.feature-list { list-style:none; margin-top:24px; }
.feature-list li { padding:10px 0; display:flex; align-items:center; gap:12px; font-size:1rem; color:#2c3a4f; border-bottom:1px solid #e8dcc8; }
.feature-list li:last-child { border-bottom:none; }
.feature-list li::before { content:'✦'; font-weight:700; color:#e67e22; font-size:1.1rem; }

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:28px; text-align:center; }
.stat-item { padding:32px 24px; border-radius:16px; background:#fff; border:2px solid #e8dcc8; transition:0.3s; }
.stat-item:hover { border-color:#d4c5b8; transform:translateY(-3px); }
.stat-number { font-size:2.5rem; font-weight:900; background:linear-gradient(135deg, #e67e22, #d35400); -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:#5a4a3a; }

/* 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; background:#fff; border:2px solid #e8dcc8; transition:0.4s; }
.content-wall-item:hover { transform:translateY(-6px); box-shadow:0 12px 40px rgba(0,0,0,0.06); border-color:#d4c5b8; }
.content-wall-item img { width:100%; height:220px; object-fit:cover; display:block; }
.content-wall-body { padding:24px; }
.content-wall-body h3 { font-size:1.15rem; margin-bottom:8px; color:#1a2633; }
.content-wall-body p { font-size:0.9rem; color:#5a4a3a; opacity:0.7; line-height:1.5; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:2px solid #e8dcc8; border-radius:14px; margin-bottom:10px; overflow:hidden; cursor:pointer; background:#fff; transition:0.3s; }
.faq-item:hover { border-color:#d4c5b8; }
.faq-item .faq-question { padding:20px 24px; font-weight:700; display:flex; justify-content:space-between; align-items:center; color:#1a2633; font-size:1.05rem; }
.faq-item .faq-question::after { content:'↓'; font-size:1.2rem; color:#e67e22; transition:0.3s; }
.faq-item.open .faq-question::after { transform:rotate(180deg); }
.faq-item .faq-answer { padding:0 24px 20px; display:none; opacity:0.75; line-height:1.7; color:#5a4a3a; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { padding:64px 32px; text-align:center; border-radius:20px; background:linear-gradient(135deg, #2c3a4f, #1a2633); color:#fff; position:relative; overflow:hidden; }
.cta-banner::before { content:''; position:absolute; top:-50%; left:-20%; width:70%; height:200%; background:radial-gradient(ellipse at center, rgba(230,126,34,0.15) 0%, transparent 70%); pointer-events:none; }
.cta-banner h2 { color:#fff; font-size:2rem; font-weight:800; margin-bottom:16px; }
.cta-banner p { color:rgba(255,255,255,0.7); margin-bottom:28px; max-width:500px; margin-left:auto; margin-right:auto; }
.cta-banner .btn-primary { background:#fff; color:#2c3a4f; box-shadow:0 4px 16px rgba(255,255,255,0.2); }
.cta-banner .btn-primary:hover { background:#f5f0eb; transform:translateY(-3px); }

/* 页脚 */
.site-footer { padding:64px 0 32px; background:#2c3a4f; color:rgba(255,255,255,0.8); }
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; }
.footer-brand { }
.footer-brand .logo { color:#fff; margin-bottom:16px; }
.footer-brand p { font-size:0.9rem; opacity:0.6; line-height:1.6; max-width:300px; }
.footer-col { }
.footer-col h4 { color:#fff; font-size:1rem; font-weight:700; margin-bottom:16px; }
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:8px; }
.footer-col ul li a { color:rgba(255,255,255,0.6); text-decoration:none; font-size:0.9rem; transition:0.3s; }
.footer-col ul li a:hover { color:#e67e22; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.1); margin-top:48px; padding-top:24px; text-align:center; font-size:0.85rem; opacity:0.5; }

/* 工具类 */
.text-accent { color:#e67e22; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; line-height:1.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .hero h1 { font-size:2.2rem; }
  .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; align-items:center; justify-content:center; }
  .main-nav.open { display:flex; flex-direction:column; position:absolute; top:72px; left:0; width:100%; background:rgba(245,240,235,0.98); padding:24px 32px; border-bottom:2px solid #d4c5b8; gap:16px; }
  .main-nav.open a { padding:8px 0; }
  .section-title { font-size:1.8rem; }
  .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; }
  .hero h1 { font-size:1.8rem; }
  .container { padding:0 16px; }
  .section { padding:60px 0; }
}