```css
/* =============================================
   51吃瓜爆料 — "Juicy Editorial" Design System
   Awwwards-caliber · Watermelon-inspired
   ============================================= */

:root {
  --primary: #1a8a4a;
  --primary-dark: #0e6b35;
  --accent: #ff4d6d;
  --accent-dark: #e63e5c;
  --accent-light: #ffe0e8;
  --bg: #fffbf3;
  --bg-alt: #f3faf3;
  --bg-cream: #fef6e8;
  --text: #1a2e1e;
  --text-muted: #5c7a6a;
  --green-tint: rgba(26, 138, 74, 0.08);
  --yellow: #ffd54a;
  --border: rgba(26, 138, 74, 0.12);
  --shadow: 0 8px 32px rgba(26, 138, 74, 0.10);
  --shadow-lg: 0 16px 48px rgba(255, 77, 109, 0.12);
  --radius: 20px;
  --radius-sm: 12px;
}

*, *::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: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ==================== 核心布局 ==================== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 90px 0; position: relative; }
.section:nth-child(even) { background: var(--bg-alt); }

/* ==================== 导航 ==================== */
.site-header {
  position: fixed;
  top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(255, 251, 243, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}
.site-header:hover { box-shadow: 0 4px 24px rgba(26, 138, 74, 0.06); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; max-width: 1200px; margin: 0 auto; padding: 0 24px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.25rem; text-decoration: none;
  color: var(--text); letter-spacing: -0.5px;
}
.logo-icon {
  width: 38px; height: 38px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--primary), #2eb663);
  color: #fff;
  box-shadow: 0 4px 12px rgba(26, 138, 74, 0.25);
  position: relative;
}
.logo-icon::after {
  content: '';
  position: absolute;
  width: 6px; height: 6px;
  background: var(--yellow);
  border-radius: 50%;
  top: 7px; right: 7px;
}
.logo span em {
  font-style: normal;
  color: var(--accent);
}
.main-nav { display: flex; align-items: center; gap: 28px; list-style: none; }
.main-nav a {
  text-decoration: none; font-size: 0.92rem; font-weight: 500;
  color: var(--text); position: relative;
  padding: 4px 0;
  transition: color 0.25s;
}
.main-nav a::after {
  content: '';
  position: absolute; left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transition: width 0.3s ease;
}
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { width: 100%; }
.nav-cta {
  padding: 10px 24px;
  border-radius: 50px;
  color: #fff !important;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  box-shadow: 0 4px 16px rgba(255, 77, 109, 0.3);
  transition: transform 0.25s, box-shadow 0.25s !important;
}
.nav-cta::after { display: none; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(255, 77, 109, 0.4); }
.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  align-items: center; justify-content: center;
  cursor: pointer; font-size: 1.2rem;
}

/* ==================== Hero ==================== */
.hero {
  min-height: 85vh;
  display: flex; align-items: center;
  background:
    radial-gradient(ellipse at 85% 30%, rgba(255, 213, 74, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 10% 80%, rgba(26, 138, 74, 0.06) 0%, transparent 50%),
    linear-gradient(180deg, rgba(255, 251, 243, 0.8) 0%, var(--bg) 100%);
  position: relative;
  padding: 120px 0 80px;
}
.hero::before {
  content: '';
  position: absolute;
  top: 20%; right: 8%;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 77, 109, 0.15), transparent 60%),
              radial-gradient(circle, rgba(26, 138, 74, 0.08), transparent 70%);
  filter: blur(40px);
  z-index: 0;
}
.hero-content { max-width: 680px; position: relative; z-index: 1; }
.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem; font-weight: 800;
  letter-spacing: 3px;
  padding: 6px 20px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: var(--accent-light);
  color: var(--accent);
  text-transform: uppercase;
  position: relative;
}
.hero-eyebrow::before {
  content: '🍉';
  margin-right: 8px;
  font-size: 0.9rem;
}
.hero h1 {
  font-size: 3.6rem; line-height: 1.08; margin-bottom: 20px;
  font-weight: 800; letter-spacing: -2px;
  color: var(--text);
}
.hero h1 .highlight {
  background: linear-gradient(120deg, var(--primary) 0%, var(--primary) 40%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}
.hero h1 .melon-dot {
  display: inline-block;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  margin: 0 4px;
  box-shadow: 0 0 0 4px rgba(255, 77, 109, 0.15);
}
.hero p {
  font-size: 1.15rem; opacity: 0.65;
  max-width: 520px; margin-bottom: 36px;
  line-height: 1.7;
}
.hero-buttons { display: flex; gap: 14px; }
.hero-image {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-lg);
  transform: rotate(2deg);
}
.hero-image img { width: 100%; height: auto; display: block; }

/* ==================== 按钮 ==================== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700; font-size: 0.95rem;
  cursor: pointer; border: none; text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: 0.2px;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #2eb663);
  box-shadow: 0 6px 20px rgba(26, 138, 74, 0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(26, 138, 74, 0.4);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--green-tint);
  transform: translateY(-3px);
}

/* ==================== 标签/标题 ==================== */
.section-label {
  display: inline-block;
  font-size: 0.78rem; font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--accent);
  background: var(--accent-light);
  padding: 5px 18px;
  border-radius: 50px;
  position: relative;
}
.section-label::before {
  content: '◆';
  font-size: 0.6rem;
  margin-right: 8px;
  color: var(--accent);
}
.section-title {
  font-size: 2.4rem; margin-bottom: 14px;
  font-weight: 800; letter-spacing: -1px;
  line-height: 1.15;
  color: var(--text);
}
.section-desc {
  max-width: 600px; opacity: 0.6;
  margin-bottom: 48px; font-size: 1.05rem;
  line-height: 1.7;
}

/* ==================== 卡片网格 ==================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.category-card {
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border);
  background: #fff;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 100px; height: 100px;
  border-radius: 50%;
  background: var(--green-tint);
  transition: transform 0.4s ease;
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.category-card:hover::before { transform: scale(2); }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; font-size: 1.4rem;
  background: linear-gradient(135deg, var(--green-tint), rgba(255, 77, 109, 0.06));
  transition: transform 0.3s;
}
.category-card:hover .card-icon { transform: scale(1.1) rotate(-5deg); }
.category-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.category-card p { font-size: 0.85rem; opacity: 0.55; margin-bottom: 16px; line-height: 1.5; }
.card-link {
  font-weight: 700; font-size: 0.82rem; text-decoration: none;
  color: var(--primary);
  display: inline-flex; align-items: center; gap: 4px;
  transition: gap 0.2s;
}
.card-link:hover { gap: 8px; }

/* ==================== 特性块 ==================== */
.feature-block {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center;
}
.feature-image {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow);
}
.feature-image::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 40%;
  background: linear-gradient(transparent, rgba(26, 138, 74, 0.05));
}
.feature-image img { width: 100%; height: auto; display: block; }
.feature-text h3 { font-size: 1.8rem; font-weight: 800; margin-bottom: 8px; letter-spacing: -0.5px; }
.feature-text p { opacity: 0.6; margin-bottom: 24px; line-height: 1.7; }
.feature-list { list-style: none; }
.feature-list li {
  padding: 8px 0; display: flex; align-items: center; gap: 10px;
  font-weight: 500; font-size: 0.95rem;
  border-bottom: 1px dashed var(--border);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list li::before {
  content: '';
  width: 22px; height: 22px;
  border-radius: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%231a8a4a'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z'/%3E%3C/svg%3E") no-repeat center/contain;
  flex-shrink: 0;
}

/* ==================== 数据条 ==================== */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center;
}
.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}
.stat-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-item::before {
  content: '●';
  position: absolute;
  top: 12px; left: 16px;
  font-size: 0.6rem;
  color: var(--accent);
  opacity: 0.5;
}
.stat-number {
  font-size: 2.4rem; font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -1px;
}
.stat-number::after {
  content: '+';
  color: var(--accent);
  font-size: 1.6rem;
  margin-left: 2px;
}
.stat-label {
  font-size: 0.9rem; opacity: 0.55;
  margin-top: 6px; font-weight: 500;
}

/* ==================== 内容墙 ==================== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.content-wall-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
.content-wall-item:hover { transform: translateY(-6px) rotate(0.5deg); box-shadow: var(--shadow); }
.content-wall-item img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.4s; }
.content-wall-item:hover img { transform: scale(1.05); }
.content-wall-body { padding: 24px; }
.content-wall-body h4 { font-weight: 700; font-size: 1rem; margin-bottom: 6px; line-height: 1.4; }
.content-wall-body p { font-size: 0.82rem; opacity: 0.5; line-height: 1.5; }
.content-wall-item .tag {
  display: inline-block;
  font-size: 0.7rem; font-weight: 700;
  padding: 3px 12px;
  border-radius: 50px;
  background: var(--green-tint);
  color: var(--primary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ==================== FAQ ==================== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  transition: all 0.3s;
}
.faq-item:hover { border-color: rgba(26, 138, 74, 0.3); }
.faq-item.open { border-color: rgba(26, 138, 74, 0.4); box-shadow: var(--shadow); }
.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 700;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.95rem;
  color: var(--text);
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--accent);
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  opacity: 0.6;
  font-size: 0.9rem;
  line-height: 1.7;
}
.faq-item.open .faq-answer { display: block; }

/* ==================== CTA横幅 ==================== */
.cta-banner {
  padding: 56px 24px;
  text-align: center;
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, #2eb663 50%, var(--accent) 120%);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -60px; left: -40px;
  width: 150px; height: 150px;
  border-radius: 50%;
  background: rgba(255, 213, 74, 0.15);
}
.cta-banner h2 { color: #fff; font-size: 1.8rem; font-weight: 800; margin-bottom: 14px; position: relative; z-index: 1; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; position: relative; z-index: 1; }
.cta-banner .btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 24px rgba(0,0,0,0.15); position: relative; z-index: 1; }
.cta-banner .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(0,0,0,0.2); }

/* ==================== 页脚 ==================== */
.site-footer {
  padding: 64px 0 28px;
  background: var(--bg-cream);
  border-top: 1px solid var(--border);
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 40px; height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 12px; color: var(--text); }
.footer-brand p { font-size: 0.85rem; opacity: 0.55; line-height: 1.6; max-width: 260px; }
.footer-col h4 {
  font-size: 0.78rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: 2px;
  margin-bottom: 16px; color: var(--primary);
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a {
  text-decoration: none; font-size: 0.85rem;
  color: var(--text); opacity: 0.6;
  transition: opacity 0.2s, padding-left 0.2s;
}
.footer-col ul a:hover { opacity: 1; padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 40px; padding-top: 20px;
  text-align: center; font-size: 0.8rem;
  color: var(--text); opacity: 0.4;
  letter-spacing: 0.3px;
}

/* ==================== 工具类 ==================== */
.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.seo-description {
  max-width: 600px; margin: 0 auto 48px;
  opacity: 0.6; font-size: 1.05rem; line-height: 1.7;
}
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ==================== 装饰元素 ==================== */
.section::after {
  content: '';
  position: absolute;
  bottom: 20px; right: 30px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 60% 40%, rgba(255, 77, 109, 0.3), transparent 60%);
  opacity: 0.3;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .feature-block { grid-template-columns: 1fr; gap: 36px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .main-nav {
    display: none;
    position: absolute;
    top: 72px; left: 0; width: 100%;
    background: var(--bg);
    padding: 24px;
    flex-direction: column;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    border-radius: 0 0 var(--radius) var(--radius);
  }
  .main-nav.open { display: flex; animation: fadeInDown 0.3s ease; }
  .menu-toggle {
    display: flex;
    border: 1px solid var(--border);
    background: #fff;
  }
  .hero { min-height: auto; padding: 110px 0 60px; }
  .hero h1 { font-size: 2.2rem; letter-spacing: -1px; }
  .hero-buttons { flex-wrap: wrap; }
  .section-title { font-size: 1.7rem; }
}

@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-buttons .btn { width: 100%; justify-content: center; }
  .hero h1 { font-size: 1.9rem; }
  .section { padding: 60px 0; }
  .cta-banner { padding: 40px 20px; }
  .cta-banner h2 { font-size: 1.4rem; }
  .stat-number { font-size: 1.8rem; }
  .feature-text h3 { font-size: 1.4rem; }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}