*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
  --fruit-red: #FF5E5E;
  --fruit-orange: #FF9A56;
  --fruit-green: #2EC4B6;
  --fruit-cream: #FFF8F0;
  --fruit-deep: #F5E6D8;
  --text-dark: #2D3436;
  --text-mid: #5A5A5A;
}

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  overflow-x: hidden;
  background: var(--fruit-cream);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

.section { padding:80px 0; }
.section:nth-child(even) { background:#F0FAF8; }

/* 导航 — 固定顶部 */
.site-header {
  position:fixed;
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  background:rgba(255,248,240,0.92);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(46,196,182,0.25);
}

.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:1.2rem;
  text-decoration:none;
  color:var(--text-dark);
  letter-spacing:-0.4px;
  white-space:nowrap;
}

.logo-icon {
  width:40px;
  height:40px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.2rem;
  background:linear-gradient(135deg, var(--fruit-red), var(--fruit-orange));
  color:#fff;
  box-shadow:0 4px 14px rgba(255,94,94,0.3);
}

.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:#4A4A4A;
  transition:color 0.2s;
  position:relative;
}

.main-nav a:not(.nav-cta)::after {
  content:'';
  position:absolute;
  bottom:-4px;
  left:0;
  width:0;
  height:2px;
  background:linear-gradient(90deg, var(--fruit-red), var(--fruit-orange));
  border-radius:2px;
  transition:width 0.3s ease;
}

.main-nav a:not(.nav-cta):hover { color:var(--fruit-red); }
.main-nav a:not(.nav-cta):hover::after { width:100%; }

.nav-cta {
  padding:9px 22px;
  border-radius:24px;
  color:#fff !important;
  font-weight:600;
  background:linear-gradient(135deg, var(--fruit-red), var(--fruit-orange));
  box-shadow:0 4px 14px rgba(255,94,94,0.25);
}

.nav-cta::after { display:none; }

.menu-toggle {
  display:none;
  width:42px;
  height:42px;
  border:none;
  border-radius:12px;
  background:linear-gradient(135deg, var(--fruit-red), var(--fruit-orange));
  cursor:pointer;
  align-items:center;
  justify-content:center;
  position:relative;
}

.menu-toggle::before {
  content:'';
  display:block;
  width:16px;
  height:2px;
  background:#fff;
  border-radius:4px;
  box-shadow:0 6px 0 #fff, 0 -6px 0 #fff;
}

/* 首页Hero */
.hero {
  min-height:80vh;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:60px;
  position:relative;
  overflow:hidden;
  padding:100px 0 60px;
  background:
    radial-gradient(circle at 88% 20%, rgba(255,94,94,0.10) 0%, rgba(255,255,255,0) 220px),
    radial-gradient(circle at 65% 85%, rgba(46,196,182,0.12) 0%, rgba(255,255,255,0) 280px),
    radial-gradient(circle at 15% 85%, rgba(255,154,86,0.08) 0%, rgba(255,255,255,0) 180px),
    var(--fruit-cream);
}

.hero::after {
  content:'瓜';
  position:absolute;
  font-size:320px;
  font-weight:900;
  line-height:1;
  color:rgba(255,154,86,0.05);
  right:8%;
  bottom:-40px;
  z-index:0;
  pointer-events:none;
  user-select:none;
}

.hero-content {
  max-width:720px;
  flex:1;
  position:relative;
  z-index:1;
}

.hero-eyebrow {
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:0.85rem;
  font-weight:700;
  padding:5px 16px;
  border-radius:20px;
  margin-bottom:20px;
  background:rgba(46,196,182,0.14);
  color:#1BA99B;
}

.hero-eyebrow::before {
  content:'';
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--fruit-red);
}

.hero h1 {
  font-size:3.2rem;
  line-height:1.15;
  margin-bottom:22px;
  font-weight:900;
  letter-spacing:-1.5px;
  color:var(--text-dark);
  position:relative;
}

.hero h1::after {
  content:'';
  display:block;
  width:80px;
  height:8px;
  margin-top:18px;
  border-radius:12px;
  background:linear-gradient(90deg, var(--fruit-red), var(--fruit-orange));
}

.hero p {
  font-size:1.1rem;
  opacity:0.75;
  max-width:560px;
  margin-bottom:32px;
  color:var(--text-mid);
}

.hero-buttons {
  display:flex;
  gap:14px;
}

.hero-image {
  flex:1;
  max-width:480px;
  border-radius:24px;
  overflow:hidden;
  box-shadow:0 8px 30px rgba(255,94,94,0.12);
  position:relative;
  z-index:1;
}

.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:26px;
  font-weight:700;
  cursor:pointer;
  border:none;
  text-decoration:none;
  transition:all 0.3s ease;
  font-size:0.95rem;
}

.btn-primary {
  color:#fff;
  background:linear-gradient(135deg, var(--fruit-red), var(--fruit-orange));
  box-shadow:0 6px 18px rgba(255,94,94,0.25);
}

.btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 12px 26px rgba(255,94,94,0.35);
}

.btn-outline {
  background:transparent;
  border:2px solid var(--fruit-orange);
  color:var(--fruit-orange);
}

.btn-outline:hover {
  background:rgba(255,154,86,0.1);
  transform:translateY(-2px);
}

/* 标签/标题 */
.section-label {
  display:inline-flex;
  align-items:center;
  font-size:0.8rem;
  font-weight:700;
  letter-spacing:2px;
  margin-bottom:14px;
  color:var(--fruit-orange);
  text-transform:uppercase;
}

.section-label::before {
  content:'';
  display:inline-block;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--fruit-red);
  margin-right:8px;
}

.section-title {
  font-size:2.4rem;
  margin-bottom:16px;
  font-weight:900;
  letter-spacing:-0.8px;
  color:var(--text-dark);
}

.section-desc {
  max-width:600px;
  opacity:0.7;
  margin-bottom:40px;
  color:var(--text-mid);
}

/* 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;
  border:1px solid var(--fruit-deep);
  background:#FFFFFF;
  transition:all 0.3s ease;
  position:relative;
  overflow:hidden;
}

.category-card::before {
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg, var(--fruit-red), var(--fruit-orange), var(--fruit-green));
  opacity:0;
  transition:opacity 0.3s;
}

.category-card::after {
  content:'';
  position:absolute;
  top:14px;
  right:14px;
  width:6px;
  height:6px;
  border-radius:50%;
  background:rgba(255,94,94,0.15);
  transition:background 0.3s;
}

.category-card:hover { transform:translateY(-6px); border-color:rgba(46,196,182,0.3); box-shadow:0 14px 30px rgba(255,94,94,0.12); }
.category-card:hover::before { opacity:1; }
.category-card:hover::after { background:rgba(255,94,94,0.5); }

.card-icon {
  width:52px;
  height:52px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:16px;
  font-size:1.4rem;
  background:#FFF0EB;
  color:var(--fruit-red);
}

.category-card:nth-child(3n+2) .card-icon { background:#FFF4E8; color:var(--fruit-orange); }
.category-card:nth-child(3n+3) .card-icon { background:#E8F8F6; color:var(--fruit-green); }

.card-link {
  font-weight:700;
  font-size:0.9rem;
  text-decoration:none;
  color:var(--fruit-red);
  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:20px;
  overflow:hidden;
  box-shadow:0 8px 30px rgba(0,0,0,0.06);
}

.feature-image img { width:100%; height:auto; display:block; }

.feature-text {
  font-size:1.05rem;
  line-height:1.7;
  color:#4A4A4A;
}

.feature-list {
  list-style:none;
  margin-top:16px;
}

.feature-list li {
  padding:6px 0;
  display:flex;
  align-items:center;
  gap:10px;
}

.feature-list li::before {
  content:'✓';
  font-weight:700;
  color:var(--fruit-green);
  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 20px;
  border-radius:20px;
  border:1px solid var(--fruit-deep);
  background:#FFFFFF;
  position:relative;
}

.stat-item::after {
  content:'';
  position:absolute;
  bottom:0;
  left:50%;
  transform:translateX(-50%);
  width:30px;
  height:4px;
  border-radius:4px;
  background:linear-gradient(90deg, var(--fruit-red), var(--fruit-orange));
}

.stat-number {
  font-size:2.6rem;
  font-weight:900;
  color:var(--fruit-red);
  line-height:1.2;
}

.stat-label {
  font-size:0.9rem;
  opacity:0.6;
  margin-top:6px;
  color:var(--text-mid);
}

/* 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 var(--fruit-deep);
  background:#FFFFFF;
  transition:all 0.3s ease;
}

.content-wall-item:hover {
  transform:translateY(-6px);
  box-shadow:0 14px 30px rgba(255,94,94,0.12);
}

.content-wall-item img {
  width:100%;
  height:200px;
  object-fit:cover;
  transition:transform 0.4s ease;
}

.content-wall-item:hover img { transform:scale(1.05); }

.content-wall-body { padding:20px; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }

.faq-item {
  border:1px solid var(--fruit-deep);
  border-radius:16px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  background:#FFFFFF;
  transition:border-color 0.3s;
}

.faq-item:hover { border-color:rgba(255,94,94,0.3); }

.faq-item .faq-question {
  padding:18px 22px;
  font-weight:700;
  display:flex;
  justify-content:space-between;
  align-items:center;
  color:var(--text-dark);
  font-size:1rem;
}

.faq-item .faq-question::after {
  content:'+';
  font-size:1.4rem;
  font-weight:400;
  color:var(--fruit-orange);
  transition:transform 0.3s;
}

.faq-item.open .faq-question::after {
  transform:rotate(45deg);
  color:var(--fruit-red);
}

.faq-item .faq-answer {
  padding:0 22px 18px;
  display:none;
  opacity:0.7;
  color:var(--text-mid);
  font-size:0.95rem;
}

.faq-item.open { border-color:rgba(255,94,94,0.3); }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner {
  padding:60px 24px;
  text-align:center;
  border-radius:24px;
  color:#fff;
  background:linear-gradient(135deg, var(--fruit-red), var(--fruit-orange));
  position:relative;
  overflow:hidden;
}

.cta-banner::before {
  content:'';
  position:absolute;
  width:160px;
  height:160px;
  border-radius:50%;
  background:rgba(255,255,255,0.1);
  top:-60px;
  left:-50px;
}

.cta-banner::after {
  content:'';
  position:absolute;
  width:100px;
  height:100px;
  border-radius:50%;
  background:rgba(255,255,255,0.08);
  bottom:-30px;
  right:20px;
}

.cta-banner h2 {
  color:#fff;
  font-size:2rem;
  font-weight:900;
  position:relative;
  z-index:1;
}

.cta-banner .btn-primary {
  background:#fff;
  color:var(--fruit-red);
  box-shadow:0 6px 18px rgba(0,0,0,0.12);
  margin-top:20px;
  position:relative;
  z-index:1;
}

.cta-banner .btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(0,0,0,0.16);
}

/* 页脚 */
.site-footer {
  padding:56px 0 28px;
  background:var(--fruit-cream);
  border-top:1px solid var(--fruit-deep);
  position:relative;
}

.site-footer::before {
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:3px;
  background:linear-gradient(90deg, var(--fruit-red), var(--fruit-orange), var(--fruit-green));
}

.site-footer .container { }

.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
}

.footer-brand {
  color:#4A4A4A;
  font-size:0.95rem;
}

.footer-col a {
  display:block;
  color:var(--text-mid);
  text-decoration:none;
  font-size:0.9rem;
  padding:4px 0;
  transition:color 0.2s;
}

.footer-col a:hover { color:var(--fruit-red); }

.footer-bottom {
  border-top:1px solid var(--fruit-deep);
  margin-top:40px;
  padding-top:20px;
  text-align:center;
  font-size:0.85rem;
  color:#9A8F88;
}

/* 工具类 */
.text-accent { color:var(--fruit-red); font-weight:700; }

.text-center { text-align:center; }

.seo-description {
  max-width:600px;
  margin:0 auto 48px;
  opacity:0.7;
  color:var(--text-mid);
}

.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .hero {
    flex-direction:column;
    text-align:center;
    padding:110px 0 60px;
    gap:40px;
  }

  .hero-content {
    max-width:100%;
  }

  .hero p {
    margin-left:auto;
    margin-right:auto;
  }

  .hero-buttons {
    justify-content:center;
  }

  .hero h1 {
    font-size:2.2rem;
  }

  .hero h1::after {
    margin-left:auto;
    margin-right:auto;
  }

  .hero-image {
    max-width:100%;
  }

  .section-title {
    font-size:1.8rem;
  }

  .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:72px;
    left:0;
    width:100%;
    background:rgba(255,248,240,0.98);
    padding:24px;
    gap:18px;
    box-shadow:0 8px 24px rgba(0,0,0,0.06);
    border-bottom:1px solid var(--fruit-deep);
    animation:menuFade 0.3s ease;
  }

  @keyframes menuFade {
    from { opacity:0; transform:translateY(-10px); }
    to { opacity:1; transform:translateY(0); }
  }
}

@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-title { font-size:1.5rem; }
  .cta-banner h2 { font-size:1.5rem; }
}