:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2035;
  --bg-nav: rgba(10, 14, 26, 0.96);
  --text-primary: #f0f2f5;
  --text-secondary: #8b95a5;
  --text-muted: #5a6577;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.4);
  --gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
  --border: #1e293b;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }

img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== HEADER & NAV ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header.scrolled { box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5); }

.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.logo { display: flex; align-items: center; gap: 10px; font-size: 1.4rem; font-weight: 700; color: var(--text-primary); }
.logo-icon { width: 38px; height: 38px; background: var(--gradient); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; color: #fff; box-shadow: 0 4px 15px var(--accent-glow); }

.nav-menu { display: flex; list-style: none; gap: 6px; }
.nav-menu a { display: block; padding: 8px 18px; color: var(--text-secondary); font-size: 0.95rem; font-weight: 500; border-radius: var(--radius-sm); transition: var(--transition); }
.nav-menu a:hover, .nav-menu a.active { color: var(--text-primary); background: rgba(99, 102, 241, 0.1); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; border: none; background: none; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* ===== HERO ===== */
.hero { padding: 140px 0 80px; background: linear-gradient(180deg, rgba(99, 102, 241, 0.08) 0%, var(--bg-primary) 100%); position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle at 30% 40%, rgba(99, 102, 241, 0.06) 0%, transparent 50%), radial-gradient(circle at 70% 60%, rgba(139, 92, 246, 0.04) 0%, transparent 50%); animation: heroGlow 15s ease-in-out infinite alternate; }
@keyframes heroGlow { 0% { transform: translate(0, 0); } 100% { transform: translate(-5%, -3%); } }

.hero-content { position: relative; z-index: 1; text-align: center; max-width: 800px; margin: 0 auto; }
.hero h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.3; margin-bottom: 20px; background: linear-gradient(135deg, #f0f2f5, #818cf8); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 36px; line-height: 1.8; }

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius); font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: var(--transition); border: none; text-decoration: none; }
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 4px 20px var(--accent-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); color: #fff; }
.btn-outline { background: transparent; color: var(--accent-light); border: 1px solid var(--accent); }
.btn-outline:hover { background: rgba(99, 102, 241, 0.1); color: var(--accent-light); }

/* ===== THREE COLUMN HERO LAYOUT ===== */
.hero-grid { display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 24px; margin-top: 50px; position: relative; z-index: 1; }
.hero-sidebar { background: var(--bg-card); border-radius: var(--radius); padding: 24px; border: 1px solid var(--border); }
.hero-sidebar h3 { font-size: 1rem; margin-bottom: 16px; color: var(--accent-light); }
.hero-sidebar ul { list-style: none; }
.hero-sidebar li { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 0.88rem; color: var(--text-secondary); }
.hero-sidebar li:last-child { border-bottom: none; }
.hero-sidebar li a { color: var(--text-secondary); }
.hero-sidebar li a:hover { color: var(--accent-light); }
.hero-center { text-align: center; }

/* ===== SECTIONS ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.section-header p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.section-divider { width: 50px; height: 3px; background: var(--gradient); border-radius: 3px; margin: 16px auto 0; }

/* ===== CARDS ===== */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(99, 102, 241, 0.3); }

.card-image { width: 100%; height: 200px; background: var(--gradient); position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.card-image-placeholder { font-size: 3rem; opacity: 0.6; }

.card-body { padding: 24px; }
.card-tag { display: inline-block; padding: 4px 12px; background: rgba(99, 102, 241, 0.15); color: var(--accent-light); border-radius: 20px; font-size: 0.78rem; font-weight: 500; margin-bottom: 12px; }
.card-title { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.card-title a { color: var(--text-primary); }
.card-title a:hover { color: var(--accent-light); }
.card-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; color: var(--text-muted); }
.card-meta a { color: var(--accent-light); font-weight: 500; }

/* ===== FEATURE BOXES ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-box { background: var(--bg-card); border-radius: var(--radius); padding: 32px; border: 1px solid var(--border); text-align: center; transition: var(--transition); }
.feature-box:hover { border-color: rgba(99, 102, 241, 0.3); transform: translateY(-4px); }
.feature-icon { width: 60px; height: 60px; margin: 0 auto 20px; background: rgba(99, 102, 241, 0.1); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; }
.feature-box h3 { font-size: 1.1rem; margin-bottom: 10px; }
.feature-box p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* ===== BREADCRUMB ===== */
.breadcrumb { padding: 90px 0 20px; font-size: 0.88rem; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.breadcrumb li { display: flex; align-items: center; gap: 8px; color: var(--text-muted); }
.breadcrumb li + li::before { content: "/"; color: var(--text-muted); }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb .current { color: var(--text-primary); }

/* ===== PAGE HEADER ===== */
.page-header { padding: 20px 0 50px; text-align: center; }
.page-header h1 { font-size: 2.2rem; font-weight: 700; margin-bottom: 12px; }
.page-header p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }

/* ===== ARTICLE ===== */
.article { max-width: 800px; margin: 0 auto; padding: 40px 0; }
.article-meta { display: flex; gap: 20px; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 20px; }
.article-body { line-height: 2; }
.article-body p { margin-bottom: 20px; color: var(--text-secondary); font-size: 1rem; }
.article-body h3 { font-size: 1.3rem; margin: 36px 0 16px; color: var(--text-primary); }
.article-body ul, .article-body ol { margin: 16px 0 20px 24px; color: var(--text-secondary); }
.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--text-primary); }

.article-list { display: flex; flex-direction: column; gap: 24px; }
.article-item { background: var(--bg-card); border-radius: var(--radius); padding: 28px; border: 1px solid var(--border); transition: var(--transition); }
.article-item:hover { border-color: rgba(99, 102, 241, 0.3); }
.article-item h3 { font-size: 1.2rem; margin-bottom: 10px; }
.article-item h3 a { color: var(--text-primary); }
.article-item h3 a:hover { color: var(--accent-light); }
.article-item p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.8; margin-bottom: 12px; }
.article-item .card-meta { margin-top: 8px; }

/* ===== TEAM CARD ===== */
.team-card { background: var(--bg-card); border-radius: var(--radius); padding: 28px; text-align: center; border: 1px solid var(--border); transition: var(--transition); }
.team-card:hover { border-color: rgba(99, 102, 241, 0.3); transform: translateY(-4px); }
.team-avatar { width: 80px; height: 80px; border-radius: 50%; background: var(--gradient); margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; }
.team-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
.team-card .team-game { color: var(--accent-light); font-size: 0.85rem; margin-bottom: 12px; }
.team-card p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.6; }

/* ===== STATS ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-box { text-align: center; padding: 32px 20px; background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); }
.stat-number { font-size: 2.4rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 8px; }
.stat-label { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item::before { content: ''; position: absolute; left: -34px; top: 6px; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent-glow); }
.timeline-item h3 { font-size: 1.1rem; margin-bottom: 6px; }
.timeline-item .timeline-date { color: var(--accent-light); font-size: 0.85rem; margin-bottom: 8px; }
.timeline-item p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }

/* ===== CONTACT / FORM ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon { width: 44px; height: 44px; background: rgba(99, 102, 241, 0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; }
.contact-item h4 { font-size: 0.95rem; margin-bottom: 4px; }
.contact-item p { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== FOOTER ===== */
.footer { background: var(--bg-secondary); border-top: 1px solid var(--border); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 12px; line-height: 1.7; }
.footer h4 { font-size: 0.95rem; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-secondary); font-size: 0.88rem; }
.footer-links a:hover { color: var(--accent-light); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; text-align: center; color: var(--text-muted); font-size: 0.82rem; }
.footer-bottom p { margin-bottom: 6px; }

/* ===== BACK TO TOP ===== */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px; background: var(--gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.2rem; cursor: pointer; opacity: 0; visibility: hidden; transition: var(--transition); box-shadow: 0 4px 15px var(--accent-glow); z-index: 999; border: none; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); }

/* ===== FLOATING BUTTONS ===== */
.float-btns { position: fixed; top: 80px; right: 20px; z-index: 998; display: flex; flex-direction: column; gap: 10px; }
.float-btn { display: flex; align-items: center; justify-content: center; padding: 12px 22px; border-radius: 50px; font-size: 0.88rem; font-weight: 600; color: #fff; text-decoration: none; white-space: nowrap; transition: var(--transition); letter-spacing: 0.5px; }
.float-btn-primary { background: linear-gradient(135deg, #6366f1, #8b5cf6); box-shadow: 0 4px 20px rgba(99, 102, 241, 0.45); }
.float-btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(99, 102, 241, 0.65); color: #fff; }
.float-btn-secondary { background: linear-gradient(135deg, #f59e0b, #ef4444); box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4); }
.float-btn-secondary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(245, 158, 11, 0.6); color: #fff; }
@media (max-width: 768px) {
  .float-btns { top: 76px; right: 10px; gap: 8px; }
  .float-btn { padding: 10px 16px; font-size: 0.8rem; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-sidebar { display: none; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  html { font-size: 15px; }
  .nav-menu { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--bg-nav); flex-direction: column; padding: 20px; border-bottom: 1px solid var(--border); backdrop-filter: blur(20px); }
  .nav-menu.active { display: flex; }
  .nav-toggle { display: flex; }
  .hero { padding: 110px 0 50px; }
  .hero h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  .section { padding: 50px 0; }
  .section-header h2 { font-size: 1.6rem; }
  .page-header h1 { font-size: 1.8rem; }
  .card-grid { grid-template-columns: 1fr; }
  .card-grid-4 { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .breadcrumb { padding: 80px 0 15px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.7rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-number { font-size: 2rem; }
}