*, *::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: #fefcf3; color: #2d3a2d; }

/* 核心布局 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; position: relative; }
.section:nth-child(even) { background: #f6f9f0; }

/* 导航 — 柠檬清新风 */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(254, 252, 243, 0.92); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(214, 222, 180, 0.5); }
.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: 700; font-size: 1.3rem; text-decoration: none; color: #4a7c4f; letter-spacing: 1px; }
.logo-icon { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; background: linear-gradient(135deg, #f5e960, #b8d430); color: #2d3a2d; box-shadow: 0 4px 12px rgba(184, 212, 48, 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: #3d5a3d; transition: 0.2s; position: relative; }
.main-nav a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: linear-gradient(90deg, #f5e960, #b8d430); transition: 0.3s; }
.main-nav a:hover { color: #4a7c4f; }
.main-nav a:hover::after { width: 100%; }
.nav-cta { padding: 10px 24px; border-radius: 50px; color: #fff !important; font-weight: 600; background: linear-gradient(135deg, #f5e960, #b8d430); box-shadow: 0 4px 16px rgba(184, 212, 48, 0.35); transition: 0.3s; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(184, 212, 48, 0.45); }
.nav-cta::after { display: none !important; }
.menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: #4a7c4f; }

/* 首页Hero — 柠檬阳光 */
.hero { min-height: 70vh; display: flex; align-items: center; background: linear-gradient(135deg, #fefcf3 0%, #f0f5e1 100%); position: relative; overflow: hidden; }
.hero::before { content: '🍋'; position: absolute; right: -60px; top: -40px; font-size: 300px; opacity: 0.06; transform: rotate(-15deg); pointer-events: none; }
.hero-content { max-width: 680px; position: relative; z-index: 2; }
.hero-eyebrow { display: inline-block; font-size: 0.8rem; font-weight: 700; padding: 6px 18px; border-radius: 50px; margin-bottom: 20px; background: linear-gradient(135deg, #f5e960, #b8d430); color: #2d3a2d; letter-spacing: 2px; }
.hero h1 { font-size: 3rem; line-height: 1.15; margin-bottom: 20px; color: #2d3a2d; font-weight: 800; letter-spacing: -1px; }
.hero h1 span { background: linear-gradient(135deg, #f5e960, #b8d430); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.1rem; opacity: 0.7; max-width: 520px; margin-bottom: 36px; color: #4a5a4a; line-height: 1.7; }
.hero-buttons { display: flex; gap: 16px; }
.hero-image { border-radius: 20px; overflow: hidden; box-shadow: 0 20px 60px rgba(184, 212, 48, 0.15); border: 2px solid rgba(245, 233, 96, 0.2); }
.hero-image img { width: 100%; height: auto; display: block; }

/* 按钮 — 柠檬系 */
.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; }
.btn-primary { color: #2d3a2d; background: linear-gradient(135deg, #f5e960, #b8d430); box-shadow: 0 4px 16px rgba(184, 212, 48, 0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(184, 212, 48, 0.4); }
.btn-outline { background: transparent; border: 2px solid #b8d430; color: #4a7c4f; }
.btn-outline:hover { background: rgba(184, 212, 48, 0.1); border-color: #f5e960; }

/* 标签/标题 */
.section-label { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 3px; margin-bottom: 12px; color: #8aa86a; text-transform: uppercase; }
.section-title { font-size: 2.2rem; margin-bottom: 14px; color: #2d3a2d; font-weight: 800; letter-spacing: -0.5px; }
.section-desc { max-width: 600px; opacity: 0.7; margin-bottom: 40px; color: #4a5a4a; }

/* 卡片网格 — 柠檬切片 */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.category-card { border-radius: 20px; padding: 32px; border: 1px solid rgba(184, 212, 48, 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, #f5e960, #b8d430); opacity: 0; transition: 0.3s; }
.category-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(184, 212, 48, 0.15); border-color: #b8d430; }
.category-card:hover::before { opacity: 1; }
.card-icon { width: 52px; height: 52px; border-radius: 16px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; font-size: 1.5rem; background: linear-gradient(135deg, #f5e960, #b8d430); color: #2d3a2d; }
.card-link { font-weight: 600; font-size: 0.85rem; text-decoration: none; color: #4a7c4f; display: inline-flex; align-items: center; gap: 6px; }
.card-link:hover { color: #b8d430; }

/* 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 12px 40px rgba(184, 212, 48, 0.1); border: 2px solid rgba(245, 233, 96, 0.15); }
.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: #3d5a3d; }
.feature-list li::before { content: '🍋'; font-weight: 700; font-size: 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: 20px; border: 1px solid rgba(184, 212, 48, 0.2); background: #fff; transition: 0.3s; }
.stat-item:hover { transform: translateY(-4px); box-shadow: 0 8px 28px rgba(184, 212, 48, 0.12); }
.stat-number { font-size: 2.4rem; font-weight: 800; color: #4a7c4f; }
.stat-label { font-size: 0.9rem; opacity: 0.6; margin-top: 6px; color: #5a6a5a; }

/* 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; border: 1px solid rgba(184, 212, 48, 0.15); background: #fff; transition: 0.3s; }
.content-wall-item:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(184, 212, 48, 0.12); }
.content-wall-item img { width: 100%; height: 200px; object-fit: cover; border-bottom: 3px solid #f5e960; }
.content-wall-body { padding: 20px; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid rgba(184, 212, 48, 0.2); border-radius: 14px; margin-bottom: 10px; overflow: hidden; cursor: pointer; background: #fff; transition: 0.2s; }
.faq-item:hover { border-color: #b8d430; }
.faq-item .faq-question { padding: 18px 24px; font-weight: 700; display: flex; justify-content: space-between; color: #2d3a2d; }
.faq-item .faq-question::after { content: '🍋'; font-size: 1rem; transition: 0.3s; }
.faq-item.open .faq-question::after { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 0 24px 20px; display: none; opacity: 0.7; color: #4a5a4a; line-height: 1.6; }
.faq-item.open .faq-answer { display: block; }

/* CTA横幅 */
.cta-banner { padding: 64px 32px; text-align: center; border-radius: 24px; background: linear-gradient(135deg, #f5e960, #b8d430); color: #2d3a2d; position: relative; overflow: hidden; }
.cta-banner::before { content: '🍋🍋🍋'; position: absolute; right: -20px; bottom: -20px; font-size: 120px; opacity: 0.1; pointer-events: none; }
.cta-banner h2 { color: #2d3a2d; font-size: 2rem; margin-bottom: 12px; }
.cta-banner p { opacity: 0.8; margin-bottom: 24px; }
.cta-banner .btn-primary { background: #2d3a2d; color: #f5e960; box-shadow: 0 4px 16px rgba(45, 58, 45, 0.2); }
.cta-banner .btn-primary:hover { background: #3d5a3d; }

/* 页脚 */
.site-footer { padding: 60px 0 28px; background: #2d3a2d; color: #e8f0d8; }
.site-footer .container { }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; }
.footer-brand { }
.footer-brand .logo { color: #f5e960; }
.footer-col h4 { color: #f5e960; margin-bottom: 16px; font-weight: 700; }
.footer-col a { display: block; color: #c0d0a0; text-decoration: none; padding: 4px 0; font-size: 0.9rem; transition: 0.2s; }
.footer-col a:hover { color: #f5e960; }
.footer-bottom { border-top: 1px solid rgba(245, 233, 96, 0.15); margin-top: 40px; padding-top: 24px; text-align: center; font-size: 0.85rem; color: #8aa86a; }

/* 工具类 */
.text-accent { color: #4a7c4f; }
.text-center { text-align: center; }
.seo-description { max-width: 600px; margin: 0 auto 48px; opacity: 0.7; color: #4a5a4a; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns: 1fr; gap: 32px; }
  .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: 68px; left: 0; width: 100%; background: #fefcf3; padding: 24px; box-shadow: 0 8px 24px rgba(0,0,0,0.05); gap: 16px; }
  .hero h1 { font-size: 2.2rem; }
  .hero::before { font-size: 180px; right: -30px; top: -20px; }
  .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: 1.8rem; }
}