/* ============================================
   Design System: "Melon Pulse" 
   Style: Magazine Grid + Pastel Citrus + Card Stacking
   Awwwards Inspired: Layered transparency, bold typography, soft shadows
   ============================================ */

/* 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: #fdfcf8; }

/* 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: #f5f0eb; }

/* 导航 — 固定顶部 */
.site-header { position:fixed; top:0; left:0; width:100%; z-index:1000; background:rgba(253,252,248,0.92); backdrop-filter:blur(12px); border-bottom:1px solid rgba(255, 183, 77, 0.2); }
.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:1.3rem; text-decoration:none; color: #2c3e50; letter-spacing: -0.5px; }
.logo-icon { width:36px; height:36px; border-radius:50%; background: linear-gradient(135deg, #ffb74d, #ff8a65); display:flex; align-items:center; justify-content:center; font-size:1.2rem; color: #fff; box-shadow: 0 2px 8px rgba(255, 138, 101, 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: #4a4a4a; transition:0.2s; letter-spacing: 0.5px; position: relative; }
.main-nav a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: #ffb74d; transition: width 0.3s; }
.main-nav a:hover::after { width: 100%; }
.nav-cta { padding:8px 22px; border-radius:30px; background: linear-gradient(135deg, #ffb74d, #ff8a65); color:#fff!important; font-weight:600; box-shadow: 0 4px 12px rgba(255, 138, 101, 0.25); }
.nav-cta::after { display: none !important; }
.menu-toggle { display:none; background: none; border: none; font-size: 1.4rem; color: #2c3e50; cursor: pointer; }

/* 首页Hero */
.hero { min-height:70vh; display:flex; align-items:center; background: linear-gradient(135deg, #fdfcf8 0%, #f5e6d3 100%); position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -20%; right: -10%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(255, 183, 77, 0.15) 0%, transparent 70%); border-radius: 50%; }
.hero-content { max-width:720px; position: relative; z-index: 1; }
.hero-eyebrow { display:inline-block; font-size:0.8rem; font-weight:600; padding:6px 18px; border-radius:30px; background: rgba(255, 183, 77, 0.2); color: #e65100; margin-bottom:16px; letter-spacing: 1px; text-transform: uppercase; }
.hero h1 { font-size:3.2rem; line-height:1.15; margin-bottom:20px; color: #2c3e50; font-weight: 800; letter-spacing: -1px; }
.hero p { font-size:1.1rem; opacity:0.7; max-width:560px; margin-bottom:32px; color: #4a4a4a; line-height: 1.7; }
.hero-buttons { display:flex; gap:14px; }
.hero-image { border-radius:12px; 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:14px 30px; border-radius:30px; 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, #ffb74d, #ff8a65); box-shadow: 0 4px 16px rgba(255, 138, 101, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255, 138, 101, 0.4); }
.btn-outline { background:transparent; border:1.5px solid #ffb74d; color: #e65100; }
.btn-outline:hover { background: rgba(255, 183, 77, 0.1); }

/* 标签/标题 */
.section-label { display:inline-block; font-size:0.75rem; font-weight:600; letter-spacing:3px; margin-bottom:12px; color: #ff8a65; text-transform: uppercase; }
.section-title { font-size:2.4rem; margin-bottom:14px; color: #2c3e50; font-weight: 800; letter-spacing: -0.5px; }
.section-desc { max-width:600px; opacity:0.7; margin-bottom:40px; color: #4a4a4a; line-height: 1.7; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:24px; }
.category-card { border-radius:16px; padding:32px; border:1px solid rgba(255, 183, 77, 0.2); background: #fff; transition:0.3s; position: relative; overflow: hidden; }
.category-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, #ffb74d, #ff8a65); }
.category-card:hover { transform:translateY(-5px); box-shadow:0 12px 28px rgba(255, 138, 101, 0.15); }
.card-icon { width:52px; height:52px; border-radius:14px; display:flex; align-items:center; justify-content:center; margin-bottom:18px; font-size:1.5rem; background: rgba(255, 183, 77, 0.15); color: #e65100; }
.card-link { font-weight:600; font-size:0.85rem; text-decoration:none; color: #ff8a65; display: inline-flex; align-items: center; gap: 4px; }
.card-link::after { content: '→'; transition: transform 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:16px; overflow:hidden; box-shadow: 0 12px 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:8px 0; display:flex; align-items:center; gap:10px; color: #4a4a4a; }
.feature-list li::before { content:'🍉'; font-weight:700; font-size: 1.1rem; }

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item { padding:28px 16px; border-radius:16px; border:1px solid rgba(255, 183, 77, 0.2); background: #fff; transition: 0.3s; }
.stat-item:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(255, 138, 101, 0.12); }
.stat-number { font-size:2.6rem; font-weight:800; background: linear-gradient(135deg, #ffb74d, #ff8a65); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:6px; color: #4a4a4a; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:24px; }
.content-wall-item { border-radius:16px; overflow:hidden; border:1px solid rgba(255, 183, 77, 0.15); transition:0.3s; background: #fff; }
.content-wall-item:hover { transform:translateY(-5px); box-shadow:0 12px 28px rgba(255, 138, 101, 0.12); }
.content-wall-item img { width:100%; height:220px; object-fit:cover; }
.content-wall-body { padding:22px; }
.content-wall-body h3 { font-size: 1.1rem; margin-bottom: 8px; color: #2c3e50; }
.content-wall-body p { font-size: 0.9rem; color: #666; line-height: 1.6; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { border:1px solid rgba(255, 183, 77, 0.2); border-radius:12px; margin-bottom:8px; overflow:hidden; cursor:pointer; background: #fff; transition: 0.2s; }
.faq-item:hover { border-color: #ffb74d; }
.faq-item .faq-question { padding:18px 22px; font-weight:600; display:flex; justify-content:space-between; color: #2c3e50; }
.faq-item .faq-question::after { content: '+'; font-size: 1.2rem; color: #ff8a65; transition: transform 0.3s; }
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:0.7; color: #4a4a4a; line-height: 1.7; }
.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, #ffb74d, #ff8a65); color:#fff; position: relative; overflow: hidden; }
.cta-banner::before { content: '🍉'; position: absolute; top: -20px; right: -20px; font-size: 8rem; opacity: 0.1; transform: rotate(15deg); }
.cta-banner h2 { color:#fff; font-size: 2rem; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; }
.cta-banner .btn-primary { background:#fff; color: #e65100; box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.cta-banner .btn-primary:hover { background: #f5f0eb; }

/* 页脚 */
.site-footer { padding:56px 0 28px; background: #2c3e50; color: rgba(255,255,255,0.8); }
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand h3 { color: #ffb74d; margin-bottom: 12px; font-size: 1.4rem; }
.footer-brand p { opacity: 0.7; line-height: 1.7; font-size: 0.9rem; }
.footer-col h4 { color: #ffb74d; margin-bottom: 16px; font-size: 1rem; }
.footer-col a { display: block; color: rgba(255,255,255,0.7); text-decoration: none; padding: 4px 0; font-size: 0.9rem; transition: 0.2s; }
.footer-col a:hover { color: #ffb74d; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.1); margin-top:40px; padding-top:20px; text-align:center; font-size:0.85rem; opacity: 0.6; }

/* 工具类 */
.text-accent { color: #ff8a65; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; color: #4a4a4a; 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; }
  .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; width: 40px; height: 40px; }
  .main-nav.open { display:flex; flex-direction:column; position:absolute; top:68px; left:0; width:100%; background:rgba(253,252,248,0.98); padding:24px; gap: 16px; border-bottom: 1px solid rgba(255, 183, 77, 0.2); }
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.8rem; }
}

@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; }
  .stat-number { font-size: 2rem; }
}