/* 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: #0d0b1a;
  color: #e8e4f0;
}

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; position: relative; }
.section:nth-child(even) { 
  background: linear-gradient(135deg, #141126 0%, #1a1538 100%);
}

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; 
  top:0; 
  left:0; 
  width:100%; 
  z-index:1000; 
  background: rgba(13, 11, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 215, 0, 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:700; 
  font-size:1.2rem; 
  text-decoration:none; 
  color: #ffd700;
}
.logo-icon { 
  width:36px; 
  height:36px; 
  border-radius:50%; 
  display:flex; 
  align-items:center; 
  justify-content:center; 
  font-size:1rem;
  background: linear-gradient(135deg, #ffd700, #ff6b35);
  color: #0d0b1a;
  font-weight: 900;
}
.main-nav { 
  display:flex; 
  align-items:center; 
  gap:24px; 
  list-style:none; 
}
.main-nav a { 
  text-decoration:none; 
  font-size:0.9rem; 
  font-weight:500; 
  transition:0.3s;
  color: #b8b0d0;
  letter-spacing: 0.5px;
}
.main-nav a:hover {
  color: #ffd700;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}
.nav-cta { 
  padding:8px 20px; 
  border-radius:25px; 
  color:#0d0b1a!important; 
  font-weight:700; 
  background: linear-gradient(135deg, #ffd700, #ff6b35);
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
  transition: all 0.3s;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(255, 215, 0, 0.5);
  color: #0d0b1a!important;
}
.menu-toggle { 
  display:none; 
  background: none;
  border: none;
  color: #ffd700;
  font-size: 1.5rem;
  cursor: pointer;
}

/* 首页Hero */
.hero { 
  min-height:80vh; 
  display:flex; 
  align-items:center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.08), 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:0.75rem; 
  font-weight:700; 
  padding:6px 18px; 
  border-radius:30px; 
  margin-bottom:20px;
  background: rgba(255, 215, 0, 0.12);
  color: #ffd700;
  letter-spacing: 2px;
  text-transform: uppercase;
  border: 1px solid rgba(255, 215, 0, 0.2);
}
.hero h1 { 
  font-size:3.2rem; 
  line-height:1.15; 
  margin-bottom:20px;
  background: linear-gradient(135deg, #ffffff 0%, #ffd700 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  letter-spacing: -1px;
}
.hero p { 
  font-size:1.1rem; 
  opacity:0.7; 
  max-width:560px; 
  margin-bottom:36px;
  color: #c8c0d8;
  line-height: 1.6;
}
.hero-buttons { 
  display:flex; 
  gap:14px; 
}
.hero-image { 
  border-radius:16px; 
  overflow:hidden;
  box-shadow: 0 20px 60px rgba(255, 215, 0, 0.1);
}
.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:30px; 
  font-weight:700; 
  cursor:pointer; 
  border:none; 
  text-decoration:none; 
  transition:0.3s;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}
.btn-primary { 
  color:#0d0b1a; 
  background: linear-gradient(135deg, #ffd700, #ff6b35);
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
}
.btn-outline { 
  background:transparent; 
  border:1.5px solid rgba(255, 215, 0, 0.4);
  color: #ffd700;
}
.btn-outline:hover {
  border-color: #ffd700;
  background: rgba(255, 215, 0, 0.08);
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label { 
  display:inline-block; 
  font-size:0.7rem; 
  font-weight:700; 
  letter-spacing:3px; 
  margin-bottom:12px;
  color: #ffd700;
  text-transform: uppercase;
}
.section-title { 
  font-size:2.2rem; 
  margin-bottom:14px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.5px;
}
.section-desc { 
  max-width:600px; 
  opacity:0.7; 
  margin-bottom:40px;
  color: #b8b0d0;
  line-height: 1.7;
}

/* 卡片网格 */
.cards-grid { 
  display:grid; 
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); 
  gap:24px; 
}
.category-card { 
  border-radius:16px; 
  padding:32px; 
  border:1px solid rgba(255, 215, 0, 0.1);
  background: rgba(255, 255, 255, 0.03);
  transition:0.4s;
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.05), transparent);
  opacity: 0;
  transition: 0.4s;
}
.category-card:hover {
  transform:translateY(-6px);
  box-shadow:0 12px 40px rgba(255, 215, 0, 0.15);
  border-color: rgba(255, 215, 0, 0.3);
}
.category-card:hover::before {
  opacity: 1;
}
.card-icon { 
  width:50px; 
  height:50px; 
  border-radius:14px; 
  display:flex; 
  align-items:center; 
  justify-content:center; 
  margin-bottom:18px; 
  font-size:1.4rem;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 107, 53, 0.15));
  color: #ffd700;
  position: relative;
  z-index: 1;
}
.card-link { 
  font-weight:600; 
  font-size:0.85rem; 
  text-decoration:none;
  color: #ffd700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  transition: 0.3s;
}
.card-link:hover {
  gap: 12px;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

/* 特性块 */
.feature-block { 
  display:grid; 
  grid-template-columns:1fr 1fr; 
  gap:56px; 
  align-items:center; 
}
.feature-image { 
  border-radius:16px; 
  overflow:hidden;
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}
.feature-image img { 
  width:100%; 
  height:auto;
  display: block;
}
.feature-text { }
.feature-list { 
  list-style:none;
  margin-top: 20px;
}
.feature-list li { 
  padding:10px 0; 
  display:flex; 
  align-items:center; 
  gap:10px;
  color: #c8c0d8;
  border-bottom: 1px solid rgba(255, 215, 0, 0.06);
}
.feature-list li::before { 
  content:'✦'; 
  font-weight:700;
  color: #ffd700;
  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; 
  border-radius:16px; 
  border:1px solid rgba(255, 215, 0, 0.1);
  background: rgba(255, 255, 255, 0.02);
  transition: 0.3s;
}
.stat-item:hover {
  border-color: rgba(255, 215, 0, 0.3);
  box-shadow: 0 8px 30px rgba(255, 215, 0, 0.08);
}
.stat-number { 
  font-size:2.5rem; 
  font-weight:800;
  background: linear-gradient(135deg, #ffd700, #ff6b35);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { 
  font-size:0.9rem; 
  opacity:0.6; 
  margin-top:8px;
  color: #b8b0d0;
}

/* 内容墙 */
.content-wall { 
  display:grid; 
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); 
  gap:24px; 
}
.content-wall-item { 
  border-radius:16px; 
  overflow:hidden; 
  border:1px solid rgba(255, 215, 0, 0.1);
  background: rgba(255, 255, 255, 0.02);
  transition:0.4s;
}
.content-wall-item:hover {
  transform:translateY(-6px);
  box-shadow:0 12px 40px rgba(255, 215, 0, 0.12);
  border-color: rgba(255, 215, 0, 0.3);
}
.content-wall-item img { 
  width:100%; 
  height:200px; 
  object-fit:cover;
  transition: 0.5s;
}
.content-wall-item:hover img {
  transform: scale(1.05);
}
.content-wall-body { 
  padding:22px; 
}

/* FAQ */
.faq-list { 
  max-width:800px; 
  margin:0 auto; 
}
.faq-item { 
  border:1px solid rgba(255, 215, 0, 0.1);
  border-radius:12px; 
  margin-bottom:10px; 
  overflow:hidden; 
  cursor:pointer;
  background: rgba(255, 255, 255, 0.02);
  transition: 0.3s;
}
.faq-item:hover {
  border-color: rgba(255, 215, 0, 0.3);
}
.faq-item .faq-question { 
  padding:18px 22px; 
  font-weight:600; 
  display:flex; 
  justify-content:space-between;
  color: #e8e4f0;
  font-size: 1rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: #ffd700;
  transition: 0.3s;
}
.faq-item.open .faq-question::after {
  content: '−';
}
.faq-item .faq-answer { 
  padding:0 22px 18px; 
  display:none; 
  opacity:0.8;
  color: #b8b0d0;
  line-height: 1.7;
}
.faq-item.open .faq-answer { 
  display:block; 
}

/* CTA横幅 */
.cta-banner { 
  padding:64px 32px; 
  text-align:center; 
  border-radius:20px; 
  background: linear-gradient(135deg, #ffd700 0%, #ff6b35 100%);
  color:#0d0b1a;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1), transparent 60%);
  pointer-events: none;
}
.cta-banner h2 { 
  color:#0d0b1a;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-banner .btn-primary { 
  background:#0d0b1a;
  color: #ffd700;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

/* 页脚 */
.site-footer { 
  padding:64px 0 28px; 
  border-top: 1px solid rgba(255, 215, 0, 0.08);
}
.site-footer .container { }
.footer-grid { 
  display:grid; 
  grid-template-columns:2fr 1fr 1fr 1fr; 
  gap:40px; 
}
.footer-brand { }
.footer-col { }
.footer-col h4 {
  color: #ffd700;
  margin-bottom: 16px;
  font-size: 0.95rem;
  letter-spacing: 1px;
}
.footer-col a {
  display: block;
  color: #b8b0d0;
  text-decoration: none;
  padding: 4px 0;
  transition: 0.3s;
  font-size: 0.9rem;
}
.footer-col a:hover {
  color: #ffd700;
  padding-left: 4px;
}
.footer-bottom { 
  border-top:1px solid rgba(255, 215, 0, 0.08); 
  margin-top:40px; 
  padding-top:24px; 
  text-align:center; 
  font-size:0.85rem;
  color: #7a7290;
}

/* 工具类 */
.text-accent { color: #ffd700; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; color: #b8b0d0; }
.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); gap: 16px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap: 32px; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; align-items: center; gap: 8px; }
  .main-nav.open { 
    display:flex; 
    flex-direction:column; 
    position:absolute; 
    top:68px; 
    left:0; 
    width:100%; 
    background: rgba(13, 11, 26, 0.98);
    backdrop-filter: blur(20px);
    padding:24px;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 215, 0, 0.15);
  }
  .hero h1 { font-size: 2.2rem; }
  .hero { min-height: 60vh; }
  .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; gap: 24px; }
  .hero-buttons { flex-direction:column; }
  .hero h1 { font-size: 1.8rem; }
  .stat-number { font-size: 2rem; }
  .cta-banner { padding: 40px 20px; }
  .cta-banner h2 { font-size: 1.4rem; }
}