*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #e8a020;
  --primary-dark: #c4861a;
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --bg-card2: #1c2330;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --border: #30363d;
  --radius: 10px;
}
html { scroll-behavior: smooth; }
body { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; background: var(--bg-dark); color: var(--text); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
nav { position: sticky; top: 0; z-index: 100; background: rgba(13,17,23,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); padding: 0 5%; }
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 700; color: var(--primary); }
.nav-logo img { height: 40px; width: auto; border-radius: 6px; }
.nav-links { display: flex; gap: 28px; font-size: 0.95rem; }
.nav-links a:hover { color: var(--primary); }
.nav-cta { display: flex; gap: 10px; }
.btn { display: inline-block; padding: 9px 22px; border-radius: 6px; font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: .2s; }
.btn-outline { border: 1px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #000; }
.btn-primary { background: var(--primary); color: #000; }
.btn-primary:hover { background: var(--primary-dark); }
.hero { position: relative; overflow: hidden; background: linear-gradient(135deg, #0d1117 0%, #1a2340 50%, #0d1117 100%); padding: 80px 5% 60px; text-align: center; }
.hero::before { content: ""; position: absolute; inset: 0; background: url('/images/开云体育首页.jpg') center/cover no-repeat; opacity: 0.12; }
.hero-inner { position: relative; max-width: 860px; margin: 0 auto; }
.hero-badge { display: inline-block; background: var(--primary); color: #000; font-size: 0.78rem; font-weight: 700; padding: 4px 14px; border-radius: 20px; margin-bottom: 20px; letter-spacing: 1px; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 800; line-height: 1.3; margin-bottom: 20px; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: 1.05rem; color: var(--text-muted); max-width: 640px; margin: 0 auto 32px; }
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-btns .btn { padding: 13px 32px; font-size: 1rem; }
.hero-stats { display: flex; gap: 40px; justify-content: center; flex-wrap: wrap; margin-top: 48px; padding-top: 36px; border-top: 1px solid var(--border); }
.hero-stat-item { text-align: center; }
.hero-stat-item strong { display: block; font-size: 1.8rem; font-weight: 800; color: var(--primary); }
.hero-stat-item span { font-size: 0.85rem; color: var(--text-muted); }
section { padding: 64px 5%; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: clamp(1.4rem, 2.5vw, 2rem); font-weight: 800; margin-bottom: 12px; }
.section-title h2 span { color: var(--primary); }
.section-title p { color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.cats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 18px; }
.cat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform .2s, border-color .2s; text-align: center; }
.cat-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.cat-card img { width: 100%; height: 110px; object-fit: cover; }
.cat-card p { padding: 10px 8px; font-size: 0.9rem; font-weight: 600; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; }
.feature-icon { font-size: 2.2rem; margin-bottom: 14px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: var(--primary); }
.feature-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; }
.promo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.promo-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform .2s; }
.promo-card:hover { transform: translateY(-4px); }
.promo-card img { width: 100%; height: 180px; object-fit: cover; }
.promo-body { padding: 20px; }
.promo-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.promo-body p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 14px; }
.promo-tag { display: inline-block; background: rgba(232,160,32,0.15); color: var(--primary); font-size: 0.78rem; padding: 3px 10px; border-radius: 4px; font-weight: 600; }
.partners-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 16px; }
.partner-card { background: var(--bg-card2); border: 1px solid var(--border); border-radius: 8px; padding: 12px; display: flex; align-items: center; justify-content: center; min-height: 70px; transition: border-color .2s; }
.partner-card:hover { border-color: var(--primary); }
.partner-card img { max-height: 40px; object-fit: contain; filter: brightness(0.85) grayscale(0.3); transition: filter .2s; }
.partner-card:hover img { filter: brightness(1) grayscale(0); }
.clubs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.club-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; text-align: center; transition: transform .2s; }
.club-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.club-card img { width: 100%; height: 150px; object-fit: cover; }
.club-card p { padding: 12px 8px; font-size: 0.88rem; color: var(--text-muted); }
.seo-block { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 40px; }
.seo-block h2 { font-size: 1.5rem; font-weight: 800; margin-bottom: 16px; color: var(--primary); }
.seo-block h3 { font-size: 1.1rem; font-weight: 700; margin: 24px 0 10px; }
.seo-block p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 12px; }
.seo-block ul { padding-left: 20px; margin-bottom: 12px; }
.seo-block ul li { font-size: 0.95rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 6px; }
.faq-list { display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; }
.faq-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.faq-item p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; }
footer { background: #090d13; border-top: 1px solid var(--border); padding: 56px 5% 28px; }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-muted); margin-top: 14px; line-height: 1.7; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; color: var(--text); }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 0.88rem; color: var(--text-muted); transition: color .2s; }
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 0.82rem; color: var(--text-muted); }
.bg-alt { background: var(--bg-card2); }
@media (max-width: 768px) { .nav-links { display: none; } .footer-top { grid-template-columns: 1fr 1fr; } .hero-stats { gap: 24px; } }
@media (max-width: 480px) { .footer-top { grid-template-columns: 1fr; } }