:root {
  --color-primary: #2E8B57;
  --color-primary-light: #3CB371;
  --color-primary-dark: #1C6A3E;
  --color-accent: #FF6347;
  --color-accent-light: #FF7F50;
  --color-bg: #F5F0E8;
  --color-bg-alt: #EDE7D9;
  --color-text: #2C2C2C;
  --color-text-light: #5A5A5A;
  --color-border: #D4CFC0;
  --color-white: #FFFFFF;
  --font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --border-radius: 12px;
  --card-shadow: 0 2px 8px rgba(0,0,0,0.06);
  --transition: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* 基础重置 */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: var(--font-family);
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  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; }

/* 偶数列背景 */
.section:nth-child(even) { 
  background: var(--color-bg-alt); 
  position: relative;
}

/* 装饰性背景条纹（创意） */
.section:nth-child(even)::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 40px,
    rgba(46, 139, 87, 0.02) 40px,
    rgba(46, 139, 87, 0.02) 80px
  );
  pointer-events: none;
}

/* 导航 — 固定顶部 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(245, 240, 232, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.02);
}

.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: 800;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.5px;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  box-shadow: 0 2px 6px rgba(46, 139, 87, 0.2);
}
.logo::after {
  content: '';
  width: 2px;
  height: 22px;
  background: var(--color-primary);
  border-radius: 1px;
  margin-left: 4px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.main-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}
.main-nav a:hover {
  color: var(--color-primary);
}
.main-nav a:hover::after {
  width: 100%;
}
.nav-cta {
  padding: 8px 24px;
  border-radius: 30px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(46, 139, 87, 0.15);
  transition: box-shadow var(--transition), transform var(--transition);
}
.nav-cta:hover {
  box-shadow: 0 4px 14px rgba(46, 139, 87, 0.25);
  transform: translateY(-1px);
}
.nav-cta::after {
  display: none;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}
.menu-toggle:hover span {
  background: var(--color-primary);
}

/* 首页Hero */
.hero {
  min-height: 75vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--color-bg) 0%, #E8F0E5 70%, #D4E8D3 100%);
}
.hero::before {
  content: '';
  position: absolute;
  right: -10%;
  top: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 139, 87, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  left: -5%;
  bottom: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 99, 71, 0.06) 0%, transparent 60%);
  pointer-events: none;
}
.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
  background: var(--color-primary);
  color: #fff;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: 3.2rem;
  line-height: 1.15;
  margin-bottom: 20px;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.hero h1::after {
  content: ' 🦅';
  font-size: 0.7em;
  opacity: 0.3;
  margin-left: 6px;
}
.hero p {
  font-size: 1.15rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.7;
}
.hero-buttons {
  display: flex;
  gap: 14px;
}
.hero-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0,0,0,0.04);
}
.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 32px;
  border-radius: 30px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition);
  font-size: 0.95rem;
  letter-spacing: 0.3px;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  box-shadow: 0 4px 12px rgba(46, 139, 87, 0.2);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(46, 139, 87, 0.3);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover {
  background: rgba(46, 139, 87, 0.04);
  border-color: var(--color-primary-dark);
  color: var(--color-primary-dark);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 12px;
  text-transform: uppercase;
  color: var(--color-primary);
}
.section-title {
  font-size: 2.4rem;
  margin-bottom: 14px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 40px;
  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: 28px;
}
.category-card {
  border-radius: 16px;
  padding: 32px 28px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  transition: all var(--transition);
  box-shadow: var(--card-shadow);
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.08);
  border-color: var(--color-primary-light);
}
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.4rem;
  background: rgba(46, 139, 87, 0.08);
  color: var(--color-primary);
}
.category-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.category-card p {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-bottom: 16px;
  line-height: 1.6;
}
.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}
.card-link:hover {
  gap: 8px;
}

/* 特性块 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.feature-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.04);
  position: relative;
}
.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(46, 139, 87, 0.06);
  border-radius: inherit;
}
.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}
.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.feature-text p {
  opacity: 0.7;
  margin-bottom: 20px;
  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;
}
.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--color-primary);
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(46, 139, 87, 0.06);
  border-radius: 50%;
  font-size: 0.75rem;
}

/* 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: 16px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  box-shadow: var(--card-shadow);
  transition: transform var(--transition);
}
.stat-item:hover {
  transform: translateY(-3px);
}
.stat-number {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  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: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  transition: all var(--transition);
  box-shadow: var(--card-shadow);
}
.content-wall-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.08);
}
.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.content-wall-body {
  padding: 22px;
}
.content-wall-body h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.content-wall-body p {
  font-size: 0.85rem;
  opacity: 0.65;
  line-height: 1.6;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 8px;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-white);
  transition: border-color var(--transition);
}
.faq-item:hover {
  border-color: var(--color-primary-light);
}
.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  transition: color var(--transition);
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-primary);
  transition: transform var(--transition);
}
.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}
.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0.7;
  line-height: 1.7;
  font-size: 0.9rem;
}
.faq-item.open .faq-answer {
  display: block;
}

/* CTA横幅 */
.cta-banner {
  padding: 60px 24px;
  text-align: center;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 12px 40px rgba(46, 139, 87, 0.15);
}
.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-banner p {
  opacity: 0.85;
  max-width: 500px;
  margin: 0 auto 24px;
  font-size: 1.05rem;
}
.cta-banner .btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.cta-banner .btn-primary:hover {
  background: #f0f0f0;
}

/* 页脚 */
.site-footer {
  padding: 56px 0 28px;
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
}
.site-footer .container {
  position: relative;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer-brand h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}
.footer-brand p {
  opacity: 0.7;
  line-height: 1.7;
  font-size: 0.9rem;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #fff;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul li a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer-col ul li a:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 48px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* 工具类 */
.text-accent {
  color: var(--color-accent);
}
.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: 1024px) {
  .hero h1 {
    font-size: 2.6rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .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;
  }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: var(--color-white);
    padding: 24px;
    gap: 16px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.04);
    border-bottom: 1px solid var(--color-border);
  }
  .main-nav.open a {
    font-size: 1rem;
    padding: 6px 0;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero {
    min-height: 60vh;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .cta-banner h2 {
    font-size: 1.5rem;
  }
}
@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;
    gap: 12px;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .stat-number {
    font-size: 1.8rem;
  }
  .section-title {
    font-size: 1.4rem;
  }
}