/* 全局重置与变量 */
*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#1a1a2e;--secondary:#16213e;--accent:#ffd700;--accent2:#e94560;--text:#333;--text-light:#666;--bg:#f8f9fa;--card-bg:#fff;--glass:rgba(255,255,255,0.15);--shadow:0 4px 20px rgba(0,0,0,0.08);--radius:16px;--transition:0.3s ease}
[data-theme=dark]{--primary:#0f0f1a;--secondary:#1a1a2e;--text:#e0e0e0;--text-light:#aaa;--bg:#0a0a14;--card-bg:#1a1a2e;--glass:rgba(255,255,255,0.05);--shadow:0 4px 20px rgba(0,0,0,0.3)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
a{color:var(--accent);text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 头部 */
header{background:var(--primary);color:#fff;padding:0;position:sticky;top:0;z-index:1000;backdrop-filter:blur(10px);background:rgba(26,26,46,0.95)}
nav{display:flex;justify-content:space-between;align-items:center;padding:15px 20px;max-width:1200px;margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:800;color:var(--accent)}
.logo svg{width:36px;height:36px}
.nav-links{display:flex;gap:25px;list-style:none}
.nav-links a{color:#fff;font-size:15px;font-weight:500;transition:color var(--transition);position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--accent)}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--accent);transition:width var(--transition)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.theme-toggle,.menu-toggle{background:none;border:none;color:#fff;font-size:20px;cursor:pointer;padding:8px;border-radius:8px;transition:background var(--transition)}
.theme-toggle:hover,.menu-toggle:hover{background:var(--glass)}
.menu-toggle{display:none}

/* 英雄区渐变Banner */
.hero{position:relative;background:linear-gradient(135deg,var(--primary),var(--secondary),#0f3460);color:#fff;padding:80px 20px 100px;text-align:center;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"%3E%3Cpath fill="%23ffd700" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,186.7C384,213,480,235,576,213.3C672,192,768,128,864,128C960,128,1056,192,1152,208C1248,224,1344,192,1392,176L1440,160L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"%3E%3C/path%3E%3C/svg%3E') no-repeat bottom;background-size:cover;animation:wave 10s ease-in-out infinite alternate}
@keyframes wave{0%{transform:translateY(0)}100%{transform:translateY(-20px)}}
.hero-content{position:relative;z-index:1;max-width:800px;margin:0 auto}
.hero h1{font-size:52px;font-weight:800;margin-bottom:20px;background:linear-gradient(135deg,var(--accent),#ff6b6b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:fadeInUp 1s ease}
.hero p{font-size:20px;margin-bottom:30px;opacity:0.9;animation:fadeInUp 1.2s ease}
.hero-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;animation:fadeInUp 1.4s ease}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:50px;font-size:16px;font-weight:600;border:none;cursor:pointer;transition:all var(--transition)}
.btn-primary{background:var(--accent);color:var(--primary)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,215,0,0.4)}
.btn-secondary{background:var(--glass);color:#fff;backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,0.2)}
.btn-secondary:hover{background:rgba(255,255,255,0.2);transform:translateY(-2px)}

/* 通用版块 */
.section{padding:80px 20px}
.section-title{text-align:center;font-size:36px;font-weight:800;margin-bottom:12px;color:var(--text)}
.section-subtitle{text-align:center;font-size:18px;color:var(--text-light);margin-bottom:50px;max-width:600px;margin-left:auto;margin-right:auto}

/* 网格与卡片（毛玻璃+圆角） */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.card{background:var(--card-bg);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);transition:all var(--transition);backdrop-filter:blur(10px);border:1px solid rgba(255,215,0,0.05)}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,0.12)}
.card-icon{font-size:40px;margin-bottom:16px;color:var(--accent)}
.card h3{font-size:20px;margin-bottom:10px;color:var(--text)}
.card p{color:var(--text-light);font-size:15px;line-height:1.7}

/* 关于我们 */
.about-content{max-width:800px;margin:0 auto;text-align:center}
.about-content p{font-size:17px;color:var(--text-light);line-height:1.8;margin-bottom:20px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-top:50px}
.stat-item{text-align:center;padding:20px}
.stat-number{font-size:48px;font-weight:800;color:var(--accent);display:block}
.stat-label{font-size:16px;color:var(--text-light);margin-top:8px}

/* 轮播 */
.swiper{position:relative;overflow:hidden;border-radius:var(--radius)}
.swiper-wrapper{display:flex;transition:transform 0.5s ease}
.swiper-slide{min-width:100%;padding:40px;background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow)}
.swiper-slide img{width:100%;height:300px;object-fit:cover;border-radius:12px;margin-bottom:16px}
.swiper-pagination{display:flex;justify-content:center;gap:10px;margin-top:20px}
.swiper-pagination span{width:12px;height:12px;border-radius:50%;background:var(--text-light);cursor:pointer;transition:background var(--transition)}
.swiper-pagination span.active{background:var(--accent)}

/* FAQ */
.faq-item{border-bottom:1px solid rgba(255,215,0,0.1);padding:16px 0}
.faq-question{display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-size:17px;font-weight:600;padding:8px 0;color:var(--text)}
.faq-question::after{content:'+';font-size:22px;color:var(--accent);transition:transform var(--transition)}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease;padding:0 16px;color:var(--text-light);line-height:1.7}
.faq-item.active .faq-answer{max-height:300px;padding:16px}

/* 联系 */
.contact-info{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.contact-info .card{text-align:center}
.contact-info .card p{font-size:15px}

/* 页脚 */
footer{background:var(--primary);color:#fff;padding:60px 20px 30px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;max-width:1200px;margin:0 auto}
.footer-col h4{font-size:18px;margin-bottom:20px;color:var(--accent)}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:rgba(255,255,255,0.7);font-size:14px;transition:color var(--transition)}
.footer-col ul li a:hover{color:var(--accent)}
.footer-bottom{text-align:center;padding-top:30px;margin-top:30px;border-top:1px solid rgba(255,255,255,0.1);font-size:14px;color:rgba(255,255,255,0.6)}

/* 返回顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;border-radius:50%;background:var(--accent);color:var(--primary);border:none;font-size:24px;cursor:pointer;box-shadow:0 4px 15px rgba(255,215,0,0.3);transition:all var(--transition);opacity:0;visibility:hidden;z-index:999}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-4px)}

/* 滚动动画（配合IntersectionObserver） */
.scroll-animate{opacity:0;transform:translateY(30px);transition:opacity 0.6s ease,transform 0.6s ease}
.scroll-animate.visible{opacity:1;transform:translateY(0)}

/* 响应式 */
@media(max-width:768px){
.hero h1{font-size:32px}
.hero p{font-size:16px}
.nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--primary);flex-direction:column;padding:20px;gap:15px}
.nav-links.open{display:flex}
.menu-toggle{display:block}
.section{padding:50px 20px}
.section-title{font-size:28px}
.grid{grid-template-columns:1fr}
.stats{grid-template-columns:1fr 1fr}
.stat-number{font-size:36px}
}
@media(max-width:480px){
.hero h1{font-size:26px}
.hero-buttons{flex-direction:column;align-items:center}
.btn{width:100%;justify-content:center}
}