/* 九游官网 - 完整样式表 */
*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif}
:root{--bg:#f8f9fa;--text:#1a1a2e;--primary:#6c63ff;--secondary:#ff6584;--accent:#43e97b;--glass:rgba(255,255,255,0.7);--shadow:0 8px 32px rgba(0,0,0,0.08);--radius:20px;--card-bg:#ffffff;--nav-bg:rgba(255,255,255,0.85);--footer-bg:#1a1a2e;--footer-text:#ccc;--section-alt:#f0f0f5}
[data-theme="dark"]{--bg:#0f0f1a;--text:#e0e0e0;--primary:#7c73ff;--secondary:#ff7a9a;--glass:rgba(30,30,50,0.8);--shadow:0 8px 32px rgba(0,0,0,0.4);--card-bg:#1a1a2e;--nav-bg:rgba(20,20,40,0.9);--footer-bg:#0a0a15;--section-alt:#151525}
body{background:var(--bg);color:var(--text);line-height:1.7;transition:background 0.3s,color 0.3s;scroll-behavior:smooth}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* 导航 */
nav{background:var(--nav-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);position:fixed;top:0;width:100%;z-index:1000;border-bottom:1px solid rgba(108,99,255,0.15);transition:background 0.3s}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px;padding:0 24px;max-width:1200px;margin:0 auto}
.logo{display:flex;align-items:center;gap:12px;font-size:1.5rem;font-weight:700;color:var(--primary);text-decoration:none}
.logo svg{width:40px;height:40px}
.nav-links{display:flex;gap:28px;list-style:none;align-items:center}
.nav-links a{text-decoration:none;color:var(--text);font-weight:500;font-size:0.95rem;transition:color 0.2s;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--primary);transition:width 0.3s}
.nav-links a:hover::after{width:100%}
.nav-links a:hover{color:var(--primary)}
.theme-toggle{background:var(--glass);border:none;border-radius:50px;padding:8px 16px;cursor:pointer;font-size:0.9rem;color:var(--text);backdrop-filter:blur(4px);border:1px solid rgba(108,99,255,0.2);transition:all 0.3s}
.theme-toggle:hover{background:var(--primary);color:#fff}
.mobile-menu-btn{display:none;background:none;border:none;font-size:1.8rem;color:var(--text);cursor:pointer}
/* Hero */
.hero{position:relative;min-height:85vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:120px 20px 80px;background:linear-gradient(135deg,var(--primary) 0%,#3f3d9e 50%,var(--secondary) 100%);overflow:hidden}
.hero::before{content:'';position:absolute;top:-30%;left:-20%;width:70%;height:80%;background:radial-gradient(circle,rgba(255,255,255,0.1) 0%,transparent 70%);pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:800px}
.hero h1{font-size:clamp(2.2rem,6vw,4rem);color:#fff;margin-bottom:20px;text-shadow:0 4px 20px rgba(0,0,0,0.2);font-weight:800;letter-spacing:-0.02em}
.hero p{font-size:clamp(1rem,2.5vw,1.3rem);color:rgba(255,255,255,0.9);margin-bottom:36px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary,.btn-secondary{padding:14px 36px;border-radius:50px;font-weight:600;font-size:1rem;text-decoration:none;transition:all 0.3s;display:inline-flex;align-items:center;gap:8px}
.btn-primary{background:#fff;color:var(--primary);box-shadow:0 8px 30px rgba(0,0,0,0.15)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 40px rgba(0,0,0,0.25)}
.btn-secondary{background:rgba(255,255,255,0.15);color:#fff;backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,0.3)}
.btn-secondary:hover{background:rgba(255,255,255,0.25);transform:translateY(-3px)}
.hero-carousel-indicators{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);display:flex;gap:12px;z-index:5}
.hero-carousel-indicators span{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,0.4);cursor:pointer;transition:all 0.3s}
.hero-carousel-indicators span.active{background:#fff;transform:scale(1.3)}
/* 通用section */
section{padding:80px 0}
.section-title{text-align:center;margin-bottom:60px}
.section-title h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:700;color:var(--text);margin-bottom:12px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:4px;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:4px;margin:12px auto 0}
.section-title p{color:var(--text);opacity:0.7;max-width:600px;margin:0 auto;font-size:1.05rem}
/* 卡片网格 */
.grid-2,.grid-3,.grid-4{display:grid;gap:30px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.card{background:var(--card-bg);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);transition:all 0.4s;border:1px solid rgba(108,99,255,0.06);backdrop-filter:blur(8px);opacity:0;transform:translateY(30px)}
.card.visible{opacity:1;transform:translateY(0)}
.card:hover{transform:translateY(-8px);box-shadow:0 16px 48px rgba(0,0,0,0.12);border-color:var(--primary)}
.card-icon{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-size:1.8rem}
.card h3{font-size:1.3rem;margin-bottom:10px;color:var(--text)}
.card p{color:var(--text);opacity:0.75;font-size:0.95rem}
/* 数字统计 */
.stats{background:linear-gradient(135deg,var(--primary),#3f3d9e);color:#fff;padding:60px 0}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:40px;text-align:center}
.stat-item .number{font-size:2.8rem;font-weight:800;display:block;line-height:1.2}
.stat-item .label{font-size:1rem;opacity:0.85;margin-top:8px}
/* 团队 */
.team-card{text-align:center;padding:30px 20px}
.team-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:2.5rem;color:#fff;font-weight:700}
.team-card h4{font-size:1.2rem;margin-bottom:4px}
.team-card .role{color:var(--primary);font-weight:600;font-size:0.9rem;margin-bottom:8px}
/* FAQ */
.faq-item{border-bottom:1px solid rgba(108,99,255,0.12);padding:16px 0;cursor:pointer}
.faq-question{display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1.05rem;color:var(--text);padding:8px 0}
.faq-question span{transition:transform 0.3s}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease;color:var(--text);opacity:0.75;padding-right:40px}
.faq-item.open .faq-answer{max-height:300px;padding-bottom:12px}
.faq-item.open .faq-question span{transform:rotate(180deg)}
/* footer */
footer{background:var(--footer-bg);color:var(--footer-text);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;margin-bottom:40px}
footer h4{color:#fff;margin-bottom:18px;font-size:1.1rem}
footer a{color:var(--footer-text);text-decoration:none;display:block;margin-bottom:8px;font-size:0.9rem;transition:color 0.2s}
footer a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;text-align:center;font-size:0.85rem;opacity:0.7}
/* 面包屑 */
.breadcrumb{background:var(--glass);backdrop-filter:blur(8px);padding:10px 24px;border-radius:12px;margin-bottom:30px;display:inline-flex;flex-wrap:wrap;gap:6px;font-size:0.9rem}
.breadcrumb a{color:var(--primary);text-decoration:none}
.breadcrumb span{color:var(--text);opacity:0.6}
/* 搜索 */
.search-box{display:flex;gap:8px;max-width:500px;margin:0 auto 40px}
.search-box input{flex:1;padding:12px 20px;border-radius:50px;border:1px solid rgba(108,99,255,0.2);background:var(--card-bg);color:var(--text);outline:none;font-size:1rem}
.search-box button{padding:12px 28px;border-radius:50px;border:none;background:var(--primary);color:#fff;cursor:pointer;font-weight:600;transition:background 0.3s}
.search-box button:hover{background:#5a52e0}
/* 返回顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.5rem;cursor:pointer;box-shadow:0 8px 30px rgba(108,99,255,0.4);transition:all 0.3s;opacity:0;transform:translateY(20px);pointer-events:none;z-index:999}
.back-to-top.show{opacity:1;transform:translateY(0);pointer-events:auto}
.back-to-top:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(108,99,255,0.5)}
/* 响应式 */
@media(max-width:768px){
    .nav-links{display:none;position:absolute;top:70px;left:0;width:100%;background:var(--nav-bg);backdrop-filter:blur(16px);flex-direction:column;padding:20px;gap:16px;border-bottom:1px solid rgba(108,99,255,0.15)}
    .nav-links.open{display:flex}
    .mobile-menu-btn{display:block}
    section{padding:50px 0}
    .hero{min-height:70vh;padding:100px 20px 60px}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
    .footer-grid{grid-template-columns:1fr}
    .hero-buttons{flex-direction:column;align-items:center}
    .btn-primary,.btn-secondary{width:100%;justify-content:center}
}
/* 懒加载占位 */
.lazy-placeholder{background:linear-gradient(135deg,#e0e0e0 25%,#f0f0f0 50%,#e0e0e0 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:12px;min-height:200px}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}
/* 滚动动画辅助 */
.fade-up{opacity:0;transform:translateY(30px);transition:opacity 0.6s ease,transform 0.6s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}
/* 暗黑模式过渡 */
.theme-transition *{transition:background 0.3s,color 0.3s,border-color 0.3s,box-shadow 0.3s}
/* 合作伙伴logo占位 */
.partner-logo{height:60px;display:flex;align-items:center;justify-content:center;background:var(--card-bg);border-radius:12px;padding:12px;opacity:0.7;font-weight:600;color:var(--text);border:1px solid rgba(108,99,255,0.1)}
/* 新闻卡片 */
.news-meta{font-size:0.85rem;opacity:0.6;margin-bottom:8px;display:flex;gap:12px}
.news-tag{background:var(--primary);color:#fff;padding:2px 12px;border-radius:20px;font-size:0.75rem;display:inline-block}
/* 联系方式图标 */
.contact-item{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.contact-item svg{flex-shrink:0;width:20px;height:20px;fill:var(--primary)}
/* 隐私等底部链接 */
.legal-links{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.legal-links a{color:var(--footer-text);font-size:0.8rem}
/* howto */
.howto-step{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.howto-step .step-num{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.howto-step h4{margin-bottom:6px}