/* 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: #faf9f6;
  color: #2c2c2c;
  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: linear-gradient(135deg, #f5f3ff 0%, #f0faf9 100%);
}

/* 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(20px);
  border-bottom: 1px solid rgba(255,107,107,0.15);
  box-shadow: 0 2px 30px rgba(255,107,107,0.06);
}
.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: #2c2c2c;
  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, #ff6b6b, #ffa07a);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255,107,107,0.3);
}
.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }
.main-nav a { 
  text-decoration:none; font-size:0.9rem; font-weight:500; 
  color: #5a5a5a;
  transition: 0.2s;
  position: relative;
  padding-bottom: 4px;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #ff6b6b, #2ec4b6);
  transition: width 0.3s;
}
.main-nav a:hover::after { width: 100%; }
.main-nav a:hover { color: #ff6b6b; }
.nav-cta { 
  padding:10px 24px; border-radius:30px; 
  color:#fff!important; font-weight:600; 
  background: linear-gradient(135deg, #ff6b6b, #ffa07a);
  box-shadow: 0 4px 14px rgba(255,107,107,0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255,107,107,0.4); }
.nav-cta::after { display: none; }
.menu-toggle { display:none; }

/* 首页Hero */
.hero { 
  min-height:70vh; display:flex; align-items:center; 
  background: linear-gradient(160deg, #ffffff 0%, #fdf4ed 100%);
  padding-top: 68px;
}
.hero-content { max-width:720px; }
.hero-eyebrow { 
  display:inline-block; font-size:0.8rem; font-weight:600; 
  padding:6px 18px; border-radius:30px; margin-bottom:18px; 
  background: linear-gradient(135deg, #2ec4b6, #3dd8c0);
  color: #fff;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.hero h1 { 
  font-size:3.2rem; line-height:1.15; margin-bottom:20px; 
  font-weight: 800;
  background: linear-gradient(135deg, #ff6b6b, #ff9a56);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p { 
  font-size:1.15rem; opacity:0.8; max-width:560px; margin-bottom:36px; 
  color: #4a4a4a;
  line-height: 1.7;
}
.hero-buttons { display:flex; gap:16px; }
.hero-image { border-radius:20px; overflow:hidden; }
.hero-image img { width:100%; height:auto; }

/* 按钮 */
.btn { 
  display:inline-flex; align-items:center; gap:8px; 
  padding:14px 32px; border-radius:40px; 
  font-weight:600; cursor:pointer; border:none; text-decoration:none; 
  transition: 0.25s ease; 
  letter-spacing: 0.5px;
}
.btn-primary { color:#fff; background: linear-gradient(135deg, #ff6b6b, #ffa07a); box-shadow: 0 4px 14px rgba(255,107,107,0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255,107,107,0.4); }
.btn-outline { 
  background:transparent; border:2px solid #ff6b6b; color: #ff6b6b;
}
.btn-outline:hover { background: rgba(255,107,107,0.08); }

/* 标签/标题 */
.section-label { 
  display:inline-block; font-size:0.75rem; font-weight:600; 
  letter-spacing:3px; margin-bottom:12px; 
  color: #2ec4b6;
  text-transform: uppercase;
}
.section-title { 
  font-size:2.2rem; margin-bottom:14px; 
  font-weight: 800;
  color: #2c2c2c;
  line-height: 1.2;
}
.section-desc { max-width:600px; opacity:0.7; margin-bottom:40px; color: #5a5a5a; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:28px; }
.category-card { 
  border-radius:20px; padding:32px; 
  background: #ffffff;
  border: 1px solid rgba(255,107,107,0.08);
  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, #ff6b6b, #2ec4b6);
  opacity: 0;
  transition: opacity 0.3s;
}
.category-card:hover::before { opacity: 1; }
.category-card:hover { 
  transform:translateY(-6px); 
  box-shadow:0 12px 30px rgba(255,107,107,0.12);
  border-color: transparent;
}
.card-icon { 
  width:52px; height:52px; border-radius:16px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:16px; font-size:1.4rem;
  background: linear-gradient(135deg, #f5f3ff, #e0f7f5);
}
.card-link { 
  font-weight:600; font-size:0.9rem; text-decoration:none; 
  color: #ff6b6b;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.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:64px; align-items:center; }
.feature-image { 
  border-radius:24px; overflow:hidden; 
  box-shadow: 0 20px 40px rgba(46,196,182,0.1);
}
.feature-image img { width:100%; height:auto; }
.feature-text { }
.feature-list { list-style:none; }
.feature-list li { 
  padding:8px 0; display:flex; align-items:center; gap:12px; 
  font-size: 1.05rem;
}
.feature-list li::before { 
  content:'✓'; font-weight:700; 
  width: 22px; height: 22px;
  background: linear-gradient(135deg, #2ec4b6, #3dd8c0);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
}

/* 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; 
  background: #ffffff;
  border: 1px solid rgba(46,196,182,0.1);
  transition: 0.3s;
}
.stat-item:hover { 
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(46,196,182,0.1);
}
.stat-number { 
  font-size:2.4rem; font-weight:800; 
  background: linear-gradient(135deg, #ff6b6b, #ff9a56);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:6px; color: #5a5a5a; }

/* 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; 
  background: #fff;
  border: 1px solid rgba(255,107,107,0.08);
  transition: 0.3s;
}
.content-wall-item:hover { 
  transform:translateY(-5px); 
  box-shadow:0 12px 30px rgba(255,107,107,0.12); 
}
.content-wall-item img { width:100%; height:200px; object-fit:cover; }
.content-wall-body { padding:24px; }
.content-wall-body h3 { font-size: 1.1rem; margin-bottom: 6px; }
.content-wall-body p { font-size: 0.9rem; opacity: 0.7; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border: 1px solid rgba(46,196,182,0.15);
  border-radius:16px; margin-bottom:12px; overflow:hidden; cursor:pointer; 
  background: #fff;
  transition: 0.2s;
}
.faq-item:hover { border-color: rgba(255,107,107,0.2); }
.faq-item .faq-question { 
  padding:18px 24px; font-weight:600; display:flex; justify-content:space-between; 
  align-items: center;
  color: #2c2c2c;
}
.faq-item .faq-question::after { 
  content: '+'; 
  font-size: 1.4rem;
  color: #ff6b6b;
  font-weight: 300;
  transition: transform 0.2s;
}
.faq-item.open .faq-question::after { content: '−'; transform: rotate(180deg); }
.faq-item .faq-answer { 
  padding:0 24px 18px; display:none; opacity:0.7; 
  color: #4a4a4a;
  line-height: 1.7;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:60px 32px; text-align:center; border-radius:24px; 
  background: linear-gradient(135deg, #ff6b6b, #ffa07a);
  color:#fff; 
  box-shadow: 0 20px 40px rgba(255,107,107,0.2);
}
.cta-banner h2 { color:#fff; font-size: 1.8rem; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; }
.cta-banner .btn-primary { 
  background:#fff; color:#ff6b6b; 
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}
.cta-banner .btn-primary:hover { background: #fef0e8; }

/* 页脚 */
.site-footer { 
  padding:60px 0 28px; 
  background: linear-gradient(160deg, #faf9f6, #f0faf9);
  border-top: 1px solid rgba(255,107,107,0.08);
}
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; }
.footer-brand { }
.footer-brand h3 { font-size: 1.2rem; margin-bottom: 12px; }
.footer-brand p { opacity: 0.7; font-size: 0.9rem; line-height: 1.6; }
.footer-col { }
.footer-col h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 16px; color: #2c2c2c; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { text-decoration: none; color: #5a5a5a; font-size: 0.9rem; opacity: 0.8; transition: 0.2s; }
.footer-col ul li a:hover { color: #ff6b6b; opacity: 1; }
.footer-bottom { 
  border-top:1px solid rgba(255,107,107,0.1); 
  margin-top:48px; padding-top:24px; text-align:center; 
  font-size:0.85rem; color: #5a5a5a;
}

/* 工具类 */
.text-accent { color: #ff6b6b; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; color: #5a5a5a; }
.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; }
  .main-nav { display:none; }
  .menu-toggle { 
    display:flex; 
    width: 40px; height: 40px; 
    background: none; border: none; 
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
  }
  .menu-toggle span {
    display: block;
    width: 24px; height: 2px;
    background: #2c2c2c;
    border-radius: 2px;
    transition: 0.3s;
  }
  .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 20px 40px rgba(0,0,0,0.08); }
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.6rem; }
}
@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; align-items: stretch; }
  .hero { min-height: 60vh; }
  .stat-number { font-size: 1.8rem; }
}