/* 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: #F5F8FC; 
  color: #2D3A4A; 
  line-height: 1.6;
}

/* 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: #EBF0F7; }

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; 
  top:0; 
  left:0; 
  width:100%; 
  z-index:1000; 
  background: rgba(255,255,255,0.85); 
  backdrop-filter:blur(12px); 
  border-bottom: 1px solid rgba(46, 180, 182, 0.15);
}
.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:800; 
  font-size:1.25rem; 
  text-decoration:none; 
  color: #2D3A4A;
  letter-spacing: -0.5px;
}
.logo-icon { 
  width:36px; 
  height:36px; 
  border-radius:10px; 
  display:flex; 
  align-items:center; 
  justify-content:center; 
  font-size:1rem;
  background: linear-gradient(135deg, #2EC4B6, #FF6F61);
  color: #fff;
}
.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; 
  transition:0.2s;
  color: #4A5B6E;
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: #2EC4B6;
  transition: width 0.3s;
}
.main-nav a:hover::after { width: 100%; }
.nav-cta { 
  padding:8px 24px; 
  border-radius:50px; 
  color:#fff!important; 
  font-weight:600;
  background: linear-gradient(135deg, #FF6F61, #2EC4B6);
  box-shadow: 0 4px 15px rgba(46, 196, 182, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(46, 196, 182, 0.4); }
.nav-cta::after { display: none; }
.menu-toggle { display:none; }

/* 首页Hero */
.hero { 
  min-height: 75vh; 
  display:flex; 
  align-items:center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(46, 196, 182, 0.12), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-content { max-width:720px; position: relative; z-index: 1; }
.hero-eyebrow { 
  display:inline-block; 
  font-size:0.8rem; 
  font-weight:700; 
  padding:4px 16px; 
  border-radius:50px; 
  margin-bottom:16px;
  background: rgba(255, 111, 97, 0.15);
  color: #FF6F61;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.hero h1 { 
  font-size:3.2rem; 
  line-height:1.15; 
  margin-bottom:20px;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #2D3A4A 40%, #2EC4B6 60%, #FF6F61);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p { 
  font-size:1.1rem; 
  opacity:0.6; 
  max-width:560px; 
  margin-bottom:32px;
  color: #5A6B7E;
  font-weight: 400;
}
.hero-buttons { display:flex; gap:14px; }
.hero-image { 
  border-radius:20px; 
  overflow:hidden;
  position: relative;
}
.hero-image::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  border: 2px solid rgba(46, 196, 182, 0.2);
  pointer-events: none;
}
.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:600; 
  cursor:pointer; 
  border:none; 
  text-decoration:none; 
  transition:0.3s;
  font-size: 0.95rem;
}
.btn-primary { 
  color:#fff;
  background: linear-gradient(135deg, #FF6F61, #2EC4B6);
  box-shadow: 0 4px 20px rgba(46, 196, 182, 0.3);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(46, 196, 182, 0.4); }
.btn-outline { 
  background:transparent; 
  border:2px solid #2EC4B6;
  color: #2EC4B6;
}
.btn-outline:hover { 
  background: rgba(46, 196, 182, 0.08);
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label { 
  display:inline-block; 
  font-size:0.75rem; 
  font-weight:700; 
  letter-spacing:2px; 
  margin-bottom:12px;
  text-transform: uppercase;
  color: #2EC4B6;
}
.section-title { 
  font-size:2.4rem; 
  margin-bottom:14px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #2D3A4A;
}
.section-desc { 
  max-width:600px; 
  opacity:0.6; 
  margin-bottom:40px;
  color: #5A6B7E;
}

/* 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; 
  border:1px solid #E0E6ED;
  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, #2EC4B6, #FF6F61);
  opacity: 0;
  transition: opacity 0.3s;
}
.category-card:hover { 
  transform:translateY(-5px); 
  box-shadow:0 8px 25px rgba(46, 196, 182, 0.12);
  border-color: #2EC4B6;
}
.category-card:hover::before { opacity: 1; }
.card-icon { 
  width:52px; 
  height:52px; 
  border-radius:14px; 
  display:flex; 
  align-items:center; 
  justify-content:center; 
  margin-bottom:16px; 
  font-size:1.5rem;
  background: linear-gradient(135deg, rgba(46,196,182,0.12), rgba(255,111,97,0.1));
  color: #2EC4B6;
}
.card-link { 
  font-weight:600; 
  font-size:0.85rem; 
  text-decoration:none; 
  color: #2EC4B6;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.card-link:hover { gap: 8px; }

/* 特性块 */
.feature-block { 
  display:grid; 
  grid-template-columns:1fr 1fr; 
  gap:60px; 
  align-items:center;
}
.feature-image { 
  border-radius:20px; 
  overflow:hidden;
  position: relative;
}
.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  border: 2px solid rgba(255, 111, 97, 0.15);
  pointer-events: none;
}
.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;
  font-weight: 500;
}
.feature-list li::before { 
  content:'✓'; 
  font-weight:700; 
  color: #2EC4B6;
  background: rgba(46, 196, 182, 0.1);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* 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 #E0E6ED;
  background: #fff;
  transition: 0.3s;
}
.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(46, 196, 182, 0.1);
}
.stat-number { 
  font-size:2.5rem; 
  font-weight:800;
  color: #2EC4B6;
  line-height: 1.1;
}
.stat-label { 
  font-size:0.9rem; 
  opacity:0.5; 
  margin-top:6px;
  color: #5A6B7E;
}

/* 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 #E0E6ED;
  background: #fff;
  transition:0.3s;
}
.content-wall-item:hover { 
  transform:translateY(-5px); 
  box-shadow:0 8px 25px rgba(46, 196, 182, 0.12);
  border-color: #2EC4B6;
}
.content-wall-item img { 
  width:100%; 
  height:220px; 
  object-fit:cover;
  transition: transform 0.4s;
}
.content-wall-item:hover img { transform: scale(1.03); }
.content-wall-body { padding:24px; }
.content-wall-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; color: #2D3A4A; }
.content-wall-body p { font-size: 0.9rem; color: #6A7B8E; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border:1px solid #E0E6ED; 
  border-radius:12px; 
  margin-bottom:10px; 
  overflow:hidden; 
  cursor:pointer;
  background: #fff;
  transition: 0.2s;
}
.faq-item:hover { border-color: #2EC4B6; }
.faq-item .faq-question { 
  padding:18px 24px; 
  font-weight:600; 
  display:flex; 
  justify-content:space-between;
  color: #2D3A4A;
  font-size: 1rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: #2EC4B6;
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-item .faq-answer { 
  padding:0 24px 18px; 
  display:none; 
  opacity:0.7;
  color: #5A6B7E;
  line-height: 1.7;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:64px 24px; 
  text-align:center; 
  border-radius:20px; 
  color:#fff;
  background: linear-gradient(135deg, #2EC4B6, #FF6F61);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.1), transparent 60%);
  pointer-events: none;
}
.cta-banner h2 { 
  color:#fff; 
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.cta-banner p { 
  color: rgba(255,255,255,0.85);
  max-width: 600px;
  margin: 0 auto 28px;
  font-size: 1rem;
}
.cta-banner .btn-primary { 
  background:#fff;
  color: #2D3A4A;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,0.15); }

/* 页脚 */
.site-footer { 
  padding:60px 0 28px; 
  background: #2D3A4A;
  color: rgba(255,255,255,0.7);
}
.site-footer .container { }
.footer-grid { 
  display:grid; 
  grid-template-columns:2.5fr 1fr 1fr 1fr; 
  gap:48px;
}
.footer-brand { }
.footer-brand .logo { color: #fff; }
.footer-brand .logo-icon { background: linear-gradient(135deg, #2EC4B6, #FF6F61); }
.footer-brand p { margin-top: 16px; color: rgba(255,255,255,0.5); font-size: 0.9rem; max-width: 280px; }
.footer-col h4 { 
  color: #fff; 
  font-size: 1rem; 
  font-weight: 700; 
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { 
  color: rgba(255,255,255,0.6); 
  text-decoration: none; 
  font-size: 0.9rem;
  transition: color 0.2s;
}
.footer-col a:hover { color: #2EC4B6; }
.footer-bottom { 
  border-top:1px solid rgba(255,255,255,0.08); 
  margin-top:48px; 
  padding-top:24px; 
  text-align:center; 
  font-size:0.85rem;
  color: rgba(255,255,255,0.4);
}

/* 工具类 */
.text-accent { color: #FF6F61; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.6; color: #5A6B7E; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 响应式 */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .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; 
    background: none; 
    border: none; 
    font-size: 1.5rem; 
    cursor: pointer;
    color: #2D3A4A;
  }
  .main-nav.open { 
    display:flex; 
    flex-direction:column; 
    position:absolute; 
    top:68px; 
    left:0; 
    width:100%; 
    background:#fff; 
    padding:24px; 
    gap:16px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    border-bottom: 1px solid #E0E6ED;
  }
  .main-nav.open a::after { display: none; }
  .nav-cta { align-self: flex-start; }
}
@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; }
  .section-title { font-size: 1.5rem; }
  .cta-banner h2 { font-size: 1.6rem; }
}