/* ===== 欧亿体育官网 — 完整样式表 ===== */
/* 全局重置与品牌变量 — 深色/亮色主题 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand-primary:#0b1a2e;
  --brand-secondary:#f0b429;
  --brand-accent:#d48c1a;
  --glass-bg:rgba(255,255,255,0.08);
  --glass-border:rgba(255,255,255,0.15);
  --card-bg:#ffffff;
  --text-primary:#1a1f2b;
  --text-secondary:#3d4452;
  --bg-body:#f4f7fc;
  --bg-section:#ffffff;
  --shadow-sm:0 8px 20px rgba(0,0,0,0.04);
  --shadow-md:0 16px 40px rgba(0,0,0,0.06);
  --radius-md:20px;
  --radius-lg:32px;
  --transition:0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  --nav-height:72px;
}
[data-theme="dark"]{
  --brand-primary:#0f1f33;
  --brand-secondary:#f0b429;
  --brand-accent:#d48c1a;
  --glass-bg:rgba(20,30,50,0.6);
  --glass-border:rgba(255,255,255,0.1);
  --card-bg:#1b2538;
  --text-primary:#edf2f7;
  --text-secondary:#b0c4de;
  --bg-body:#0a111f;
  --bg-section:#111b2b;
  --shadow-sm:0 8px 20px rgba(0,0,0,0.5);
  --shadow-md:0 16px 40px rgba(0,0,0,0.6);
}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg-body);color:var(--text-primary);line-height:1.6;
  transition:background 0.4s,color 0.4s;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%;height:auto}
.container{max-width:1280px;margin:0 auto;padding:0 24px}
/* 玻璃效果组件 */
.glass-card{
  background:var(--glass-bg);backdrop-filter:blur(12px);
  border:1px solid var(--glass-border);border-radius:var(--radius-md);
  box-shadow:var(--shadow-sm);transition:transform 0.3s,box-shadow 0.4s;
}
.glass-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
/* 圆角卡片 */
.card{
  background:var(--card-bg);border-radius:var(--radius-md);
  box-shadow:var(--shadow-sm);padding:24px;transition:0.3s;
}
.card:hover{box-shadow:var(--shadow-md)}
/* 渐变banner */
.gradient-banner{
  background:linear-gradient(135deg, #0b1a2e 0%, #1a2f4a 60%, #2c405a 100%);
  color:#fff;border-radius:0 0 var(--radius-lg) var(--radius-lg);
}
/* 暗黑模式切换按钮 */
.dark-toggle{
  background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:40px;width:44px;height:44px;display:flex;
  align-items:center;justify-content:center;cursor:pointer;
  backdrop-filter:blur(8px);transition:0.3s;
}
.dark-toggle:hover{background:var(--brand-secondary);color:#0b1a2e}
/* 导航吸顶 + 高亮 */
.global-header{
  position:sticky;top:0;z-index:1000;height:var(--nav-height);
  background:rgba(11,26,46,0.85);backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,0.08);
  transition:background 0.3s;
}
.nav-menu{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.nav-link{
  padding:8px 14px;border-radius:40px;font-weight:500;font-size:0.95rem;
  transition:0.25s;color:rgba(255,255,255,0.8);
}
.nav-link.active,.nav-link:hover{background:var(--brand-secondary);color:#0b1a2e}
/* 移动菜单 */
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mobile-menu-btn span{width:28px;height:2.5px;background:#fff;border-radius:4px;transition:0.3s}
@media (max-width:768px){
  .nav-menu{display:none;flex-direction:column;background:var(--brand-primary);position:absolute;top:var(--nav-height);left:0;right:0;padding:20px;gap:12px;border-radius:0 0 var(--radius-md) var(--radius-md)}
  .nav-menu.open{display:flex}
  .mobile-menu-btn{display:flex}
  .global-header .container{display:flex;align-items:center;justify-content:space-between}
}
/* 轮播 */
.carousel{position:relative;overflow:hidden;border-radius:var(--radius-lg)}
.carousel-track{display:flex;transition:transform 0.6s ease}
.carousel-slide{min-width:100%;padding:60px 40px}
.carousel-nav{display:flex;justify-content:center;gap:12px;margin-top:24px}
.carousel-dot{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,0.3);cursor:pointer;transition:0.3s}
.carousel-dot.active{background:var(--brand-secondary);transform:scale(1.2)}
/* 数字动画 */
.countup{font-size:2.6rem;font-weight:700;color:var(--brand-secondary);line-height:1.2}
/* 滚动动画 */
.reveal{opacity:0;transform:translateY(28px);transition:0.7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
/* FAQ折叠 */
.faq-item summary{cursor:pointer;font-weight:600;padding:16px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(0,0,0,0.06)}
.faq-item[open] summary{border-bottom-color:var(--brand-secondary)}
.faq-item p{padding:12px 0 16px;color:var(--text-secondary)}
/* 返回顶部 */
.back-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;border-radius:50%;background:var(--brand-secondary);color:#0b1a2e;display:flex;align-items:center;justify-content:center;font-size:24px;box-shadow:0 8px 20px rgba(0,0,0,0.2);cursor:pointer;z-index:999;opacity:0;transform:translateY(20px);transition:0.3s;border:none}
.back-top.show{opacity:1;transform:translateY(0)}
/* 页脚 */
.footer{background:var(--brand-primary);color:rgba(255,255,255,0.8);padding:40px 0 20px;border-radius:var(--radius-lg) var(--radius-lg) 0 0;margin-top:60px}
.footer a:hover{color:var(--brand-secondary)}
/* 布局 */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
@media (max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.text-center{text-align:center}
.mt-20{margin-top:20px}
.mb-20{margin-bottom:20px}
.section{padding:60px 0}
.badge{display:inline-block;background:var(--brand-secondary);color:#0b1a2e;padding:4px 16px;border-radius:40px;font-weight:600;font-size:0.85rem}
h1{font-size:3rem;font-weight:700;line-height:1.2;margin-bottom:16px}
h2{font-size:2.2rem;font-weight:600;margin-bottom:24px;position:relative}
h2:after{content:'';display:block;width:60px;height:4px;background:var(--brand-secondary);margin-top:8px;border-radius:4px}
.text-secondary{color:var(--text-secondary)}
.btn-primary{background:var(--brand-secondary);color:#0b1a2e;padding:12px 32px;border-radius:40px;font-weight:600;border:none;cursor:pointer;transition:0.3s;display:inline-block}
.btn-primary:hover{background:#e5a620;transform:scale(1.02);box-shadow:0 8px 20px rgba(240,180,41,0.3)}
.flex-center{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.gap-16{gap:16px}
/* 图片占位SVG自适应 */
.svg-icon{width:48px;height:48px;fill:var(--brand-secondary);flex-shrink:0}
.logo-svg{height:40px;width:auto}