/* 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: #0a0b0e;
  color: #e8e9ed;
}

/* 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: #111318; }

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; 
  top:0; 
  left:0; 
  width:100%; 
  z-index:1000; 
  background: rgba(10,11,14,0.92); 
  backdrop-filter:blur(16px); 
  border-bottom:1px solid rgba(255,255,255,0.06); 
}
.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:800; 
  font-size:1.25rem; 
  text-decoration:none; 
  color: #f0b90b; 
  letter-spacing: -0.02em;
}
.logo-icon { 
  width:38px; 
  height:38px; 
  border-radius:10px; 
  display:flex; 
  align-items:center; 
  justify-content:center; 
  font-size:1.2rem; 
  background: linear-gradient(135deg, #f0b90b, #f5d93a);
  color: #0a0b0e;
  font-weight: 900;
}
.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:0.3s; 
  color: rgba(232,233,237,0.7);
  letter-spacing: 0.3px;
  position: relative;
  padding: 4px 0;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #f0b90b;
  transition: width 0.3s ease;
}
.main-nav a:hover { color: #f0b90b; }
.main-nav a:hover::after { width: 100%; }
.nav-cta { 
  padding:10px 24px; 
  border-radius:8px; 
  color:#0a0b0e!important; 
  font-weight:700; 
  background: linear-gradient(135deg, #f0b90b, #f5d93a);
  box-shadow: 0 4px 20px rgba(240,185,11,0.3);
  transition: all 0.3s ease;
}
.nav-cta:hover { 
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(240,185,11,0.45);
  color: #0a0b0e!important;
}
.nav-cta::after { display: none; }
.menu-toggle { display:none; color: #e8e9ed; font-size: 1.4rem; cursor: pointer; }

/* 首页Hero */
.hero { 
  min-height:80vh; 
  display:flex; 
  align-items:center; 
  position: relative;
  background: radial-gradient(ellipse at 20% 50%, rgba(240,185,11,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(240,185,11,0.05) 0%, transparent 50%);
}
.hero-content { max-width:720px; }
.hero-eyebrow { 
  display:inline-block; 
  font-size:0.8rem; 
  font-weight:700; 
  padding:6px 18px; 
  border-radius:20px; 
  margin-bottom:20px; 
  background: rgba(240,185,11,0.12);
  color: #f0b90b;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero h1 { 
  font-size:3.2rem; 
  line-height:1.1; 
  margin-bottom:20px; 
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #e8e9ed 0%, #f0b90b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p { 
  font-size:1.15rem; 
  opacity:0.6; 
  max-width:560px; 
  margin-bottom:36px; 
  line-height: 1.7;
  color: #9a9ca8;
}
.hero-buttons { display:flex; gap:14px; }
.hero-image { 
  border-radius:16px; 
  overflow:hidden; 
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.hero-image img { width:100%; height:auto; display: block; }

/* 按钮 */
.btn { 
  display:inline-flex; 
  align-items:center; 
  gap:10px; 
  padding:14px 32px; 
  border-radius:10px; 
  font-weight:700; 
  cursor:pointer; 
  border:none; 
  text-decoration:none; 
  transition:0.3s; 
  font-size: 0.95rem;
}
.btn-primary { 
  color:#0a0b0e; 
  background: linear-gradient(135deg, #f0b90b, #f5d93a);
  box-shadow: 0 4px 20px rgba(240,185,11,0.3);
}
.btn-primary:hover { 
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(240,185,11,0.4);
}
.btn-outline { 
  background:transparent; 
  border:1.5px solid rgba(240,185,11,0.4); 
  color: #f0b90b;
}
.btn-outline:hover { 
  border-color: #f0b90b;
  background: rgba(240,185,11,0.08);
  transform: translateY(-2px);
}

/* 标签/标题 */
.section-label { 
  display:inline-block; 
  font-size:0.75rem; 
  font-weight:700; 
  letter-spacing:3px; 
  margin-bottom:14px; 
  color: #f0b90b;
  text-transform: uppercase;
}
.section-title { 
  font-size:2.2rem; 
  margin-bottom:14px; 
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-desc { 
  max-width:600px; 
  opacity:0.6; 
  margin-bottom:44px; 
  color: #9a9ca8;
  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:14px; 
  padding:32px; 
  border:1px solid rgba(255,255,255,0.06); 
  transition:0.4s; 
  background: rgba(255,255,255,0.02);
}
.category-card:hover { 
  transform:translateY(-5px); 
  box-shadow:0 8px 30px rgba(0,0,0,0.4);
  border-color: rgba(240,185,11,0.2);
  background: rgba(240,185,11,0.04);
}
.card-icon { 
  width:52px; 
  height:52px; 
  border-radius:12px; 
  display:flex; 
  align-items:center; 
  justify-content:center; 
  margin-bottom:18px; 
  font-size:1.4rem; 
  background: rgba(240,185,11,0.1);
  color: #f0b90b;
}
.card-link { 
  font-weight:600; 
  font-size:0.85rem; 
  text-decoration:none; 
  color: #f0b90b;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: 0.3s;
}
.card-link:hover { gap: 12px; }

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.feature-image { 
  border-radius:16px; 
  overflow:hidden; 
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}
.feature-image img { width:100%; height:auto; display: block; }
.feature-text { }
.feature-list { list-style:none; }
.feature-list li { 
  padding:10px 0; 
  display:flex; 
  align-items:center; 
  gap:10px; 
  color: #c0c2cc;
}
.feature-list li::before { 
  content:'✓'; 
  font-weight:700; 
  color: #f0b90b;
  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:14px; 
  border:1px solid rgba(255,255,255,0.06); 
  background: rgba(255,255,255,0.02);
  transition: 0.3s;
}
.stat-item:hover {
  border-color: rgba(240,185,11,0.2);
  transform: translateY(-3px);
}
.stat-number { 
  font-size:2.5rem; 
  font-weight:900; 
  background: linear-gradient(135deg, #f0b90b, #f5d93a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.stat-label { 
  font-size:0.9rem; 
  opacity:0.5; 
  margin-top:8px; 
  color: #9a9ca8;
}

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:24px; }
.content-wall-item { 
  border-radius:14px; 
  overflow:hidden; 
  border:1px solid rgba(255,255,255,0.06); 
  transition:0.4s; 
  background: rgba(255,255,255,0.02);
}
.content-wall-item:hover { 
  transform:translateY(-5px); 
  box-shadow:0 8px 30px rgba(0,0,0,0.4);
  border-color: rgba(240,185,11,0.2);
}
.content-wall-item img { 
  width:100%; 
  height:220px; 
  object-fit:cover; 
  transition: 0.4s;
}
.content-wall-item:hover img { transform: scale(1.05); }
.content-wall-body { padding:24px; }
.content-wall-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.content-wall-body p { opacity: 0.6; font-size: 0.9rem; line-height: 1.6; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border:1px solid rgba(255,255,255,0.06); 
  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(240,185,11,0.15); }
.faq-item .faq-question { 
  padding:18px 24px; 
  font-weight:600; 
  display:flex; 
  justify-content:space-between; 
  align-items: center;
  font-size: 1rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  transition: 0.3s;
  color: #f0b90b;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-item .faq-answer { 
  padding:0 24px 20px; 
  display:none; 
  opacity:0.7; 
  line-height: 1.7;
  color: #9a9ca8;
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:64px 24px; 
  text-align:center; 
  border-radius:16px; 
  color:#0a0b0e; 
  background: linear-gradient(135deg, #f0b90b 0%, #f5d93a 50%, #f0b90b 100%);
  box-shadow: 0 20px 60px rgba(240,185,11,0.3);
  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) 0%, transparent 60%);
  animation: ctaGlow 8s ease-in-out infinite;
}
@keyframes ctaGlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(10%, 10%); }
}
.cta-banner h2 { 
  color:#0a0b0e; 
  font-size: 2.2rem;
  font-weight: 800;
  position: relative;
  z-index: 1;
}
.cta-banner p { 
  color: rgba(10,11,14,0.7); 
  max-width: 500px; 
  margin: 16px auto 28px;
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary { 
  background:#0a0b0e; 
  color: #f0b90b;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary:hover { 
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

/* 页脚 */
.site-footer { 
  padding:64px 0 28px; 
  background: #08090c;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; }
.footer-brand { }
.footer-brand .logo { color: #f0b90b; margin-bottom: 16px; }
.footer-brand p { opacity: 0.5; font-size: 0.9rem; line-height: 1.7; max-width: 300px; }
.footer-col { }
.footer-col h4 { font-size: 0.85rem; font-weight: 700; margin-bottom: 16px; letter-spacing: 1px; color: #f0b90b; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { 
  text-decoration: none; 
  opacity: 0.5; 
  font-size: 0.9rem; 
  transition: 0.3s; 
  color: #c0c2cc;
}
.footer-col a:hover { opacity: 1; color: #f0b90b; }
.footer-bottom { 
  border-top:1px solid rgba(255,255,255,0.04); 
  margin-top:48px; 
  padding-top:24px; 
  text-align:center; 
  font-size:0.85rem; 
  opacity: 0.4;
}

/* 工具类 */
.text-accent { color: #f0b90b; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.6; color: #9a9ca8; line-height: 1.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 响应式 */
@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; gap: 32px; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; align-items: center; justify-content: center; width: 40px; height: 40px; }
  .main-nav.open { 
    display:flex; 
    flex-direction:column; 
    position:absolute; 
    top:68px; 
    left:0; 
    width:100%; 
    background: rgba(10,11,14,0.98); 
    padding:24px; 
    gap: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.8rem; }
  .stat-number { font-size: 2rem; }
}
@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; }
  .hero { min-height: 60vh; }
}