/* 愚越时代 - 新版样式 */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Microsoft YaHei, sans-serif; color: #333; line-height: 1.6; background: #f5f7fa; }
a { text-decoration: none; color: inherit; }
.container { width: 1200px; margin: 0 auto; }
#wrapper { background: #fff; }

/* top nav */
.top-bar { background: #1a1a2e; color: #fff; padding: 8px 0; position: sticky; top: 0; z-index: 1000; width: 100%; }
.top-bar .container { display: flex; justify-content: space-between; align-items: center; }
.top-nav a { color: #ccc; font-size: 13px; margin-right: 25px; transition: color 0.3s; }
.top-nav a:hover { color: #fff; }
.ai-btn { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); padding: 6px 16px; border-radius: 20px; color: #fff; font-size: 13px; display: flex; align-items: center; gap: 8px; }
.ai-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(102,126,234,0.4); }
.ai-icon { background: #fff; color: #667eea; width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 10px; }

/* main nav */
.main-nav { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.08); padding: 15px 0; position: sticky; top: 0; z-index: 100; }
.main-nav .container { display: flex; align-items: center; justify-content: space-between; }
.logo h1 { font-size: 28px; color: #1a1a2e; font-weight: bold; }
.logo p { font-size: 12px; color: #999; }
.nav-links a { color: #333; font-size: 15px; padding: 8px 20px; margin-left: 10px; border-radius: 4px; transition: all 0.3s; }
.nav-links a:hover, .nav-links a.active { background: #667eea; color: #fff; }

/* banner */
.banner-section { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); color: #fff; padding: 80px 0; text-align: center; }
.banner-content h2 { font-size: 42px; margin-bottom: 15px; }
.banner-content p { font-size: 18px; color: #ccc; margin-bottom: 25px; }
.banner-tags span { background: rgba(255,255,255,0.1); padding: 8px 20px; border-radius: 20px; margin: 0 8px; font-size: 14px; }

/* ai banner */
.ai-banner { background: linear-gradient(90deg, #667eea 0%, #764ba2 100%); padding: 30px 0; }
.ai-content { display: flex; align-items: center; justify-content: space-between; color: #fff; }
.ai-text h3 { font-size: 24px; margin-bottom: 5px; }
.ai-text p { font-size: 14px; opacity: 0.9; }
.ai-enter-btn { background: #fff; color: #667eea; padding: 12px 30px; border-radius: 30px; font-weight: bold; display: flex; align-items: center; gap: 8px; transition: all 0.3s; }
.ai-enter-btn:hover { transform: translateX(5px); box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
.ai-enter-btn svg { fill: #667eea; }

/* sections */
.section { padding: 60px 0; }
.section-header { text-align: center; margin-bottom: 40px; }
.section-header h2 { font-size: 32px; color: #1a1a2e; margin-bottom: 10px; }
.section-header p { font-size: 16px; color: #666; }
.section-more { text-align: center; margin-top: 30px; }
.more-btn { display: inline-block; padding: 12px 40px; border: 2px solid #667eea; color: #667eea; border-radius: 30px; font-size: 14px; transition: all 0.3s; }
.more-btn:hover { background: #667eea; color: #fff; }

/* brand logo wall */
.brand-section { background: #fff; }
.brand-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.brand-item { background: #f8f9fa; border-radius: 8px; padding: 20px; text-align: center; transition: all 0.3s; cursor: pointer; }
.brand-item:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.brand-logo { height: 80px; display: flex; align-items: center; justify-content: center; margin-bottom: 10px; }
.brand-logo img { max-width: 100%; max-height: 60px; object-fit: contain; }
.brand-name { font-size: 13px; color: #333; font-weight: 500; }

/* industry nav */
.nav-section { background: #f5f7fa; }
.nav-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.nav-card { background: #fff; border-radius: 12px; padding: 30px; text-align: center; transition: all 0.3s; }
.nav-card:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.nav-icon { font-size: 48px; margin-bottom: 15px; }
.nav-card h3 { font-size: 18px; color: #1a1a2e; margin-bottom: 8px; }
.nav-card p { font-size: 13px; color: #666; }

/* footer */
.footer { background: #1a1a2e; color: #fff; padding: 50px 0 20px; }
.footer-content { display: flex; justify-content: space-between; margin-bottom: 40px; }
.footer-brand h3 { font-size: 24px; margin-bottom: 8px; }
.footer-brand p { font-size: 13px; color: #999; }
.footer-links a { display: block; color: #ccc; font-size: 14px; margin-bottom: 10px; }
.footer-links a:hover { color: #fff; }
.footer-ai p { font-size: 13px; color: #999; margin-bottom: 8px; }
.footer-ai a { color: #667eea; font-size: 14px; }
.footer-bottom { border-top: 1px solid #333; padding-top: 20px; text-align: center; font-size: 13px; color: #666; }

/* responsive - tablet <= 1024px */
@media screen and (max-width: 1024px) {
  .container { width: 100% !important; padding: 0 20px; }
  .brand-grid { grid-template-columns: repeat(3, 1fr) !important; }
  .nav-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .banner-content h2 { font-size: 32px; }
  .banner-section { padding: 60px 0; }
}

/* responsive - mobile <= 768px */
@media screen and (max-width: 768px) {
  body { min-width: 0 !important; width: 100% !important; overflow-x: hidden !important; }
  .container { width: 100% !important; padding: 0 15px; }
  .top-bar { padding: 6px 0; }
  .top-nav { display: none !important; }
  .ai-btn { padding: 5px 12px; font-size: 12px; }
  .main-nav { padding: 10px 0; }
  .main-nav .container { flex-wrap: wrap; }
  .logo h1 { font-size: 20px; }
  .nav-links { display: none !important; }
  .banner-section { padding: 40px 0; }
  .banner-content h2 { font-size: 24px !important; }
  .banner-content p { font-size: 14px !important; }
  .banner-tags span { display: block; margin: 5px auto; padding: 5px 15px; font-size: 12px; }
  .ai-banner { padding: 20px 0; }
  .ai-content { flex-direction: column; text-align: center; gap: 15px; }
  .ai-text h3 { font-size: 18px; }
  .ai-enter-btn { padding: 10px 24px; font-size: 14px; }
  .section { padding: 40px 0; }
  .section-header h2 { font-size: 24px !important; }
  .section-header p { font-size: 14px !important; }
  .brand-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px; }
  .brand-item { padding: 15px 10px; }
  .brand-logo { height: 50px; }
  .brand-logo img { max-height: 40px; }
  .brand-name { font-size: 12px; }
  .nav-grid { grid-template-columns: 1fr !important; gap: 12px; }
  .nav-card { padding: 20px; }
  .nav-icon { font-size: 36px; }
  .footer { padding: 30px 0 15px; }
  .footer-content { flex-direction: column; gap: 20px; text-align: center; }
  .footer-brand h3 { font-size: 18px; }
  .footer-bottom { font-size: 12px; }
}

/* responsive - small mobile <= 375px */
@media screen and (max-width: 375px) {
  .container { padding: 0 12px; }
  .logo h1 { font-size: 18px; }
  .banner-content h2 { font-size: 20px !important; }
  .brand-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 8px; }
  .section-header h2 { font-size: 20px !important; }
}