/* style.css - bsports必一运动 官方网站 */
:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #e94560;
  --accent2: #f5a623;
  --text: #eaeaea;
  --text-dark: #1a1a2e;
  --bg: #0f0f23;
  --card-bg: rgba(255,255,255,0.06);
  --glass: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.12);
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
  --radius: 20px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}
[data-theme="dark"] {
  --primary: #eaeaea;
  --secondary: #c0c0c0;
  --accent: #ff6b81;
  --accent2: #ffb347;
  --text: #1a1a2e;
  --text-dark: #eaeaea;
  --bg: #f5f5fa;
  --card-bg: rgba(0,0,0,0.04);
  --glass: rgba(0,0,0,0.05);
  --glass-border: rgba(0,0,0,0.1);
  --shadow: 0 8px 32px rgba(0,0,0,0.1);
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--accent); text-decoration:none; transition: color 0.3s; }
a:hover { color: var(--accent2); }
img, svg { max-width:100%; display:block; }
ul { list-style:none; }
.container { max-width:1200px; margin:0 auto; padding:0 20px; }
.section { padding:80px 0; }
.glass {
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.gradient-bg {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, #0f3460 100%);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--accent), #ff6b81);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 6px 20px rgba(233,69,96,0.3);
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(233,69,96,0.4); color:#fff; }
.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  box-shadow: none;
}
.btn-outline:hover { background: var(--accent); color:#fff; }
h1, h2, h3, h4 { line-height:1.3; font-weight:700; }
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom:20px; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
.text-center { text-align:center; }
.text-accent { color: var(--accent); }
.mt-20 { margin-top:20px; }
.mb-20 { margin-bottom:20px; }
.mb-40 { margin-bottom:40px; }
.grid-2 { display:grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap:30px; }
.grid-3 { display:grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap:25px; }
.grid-4 { display:grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap:20px; }
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 30px;
  border: 1px solid var(--glass-border);
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: var(--accent); }
.icon-svg { width:48px; height:48px; margin-bottom:15px; }
.fade-in { opacity:0; transform: translateY(30px); transition: all 0.7s ease; }
.fade-in.visible { opacity:1; transform: translateY(0); }
header {
  position: fixed;
  top:0; left:0; right:0;
  z-index: 1000;
  padding: 15px 0;
  background: rgba(15,15,35,0.85);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--glass-border);
  transition: all 0.3s;
}
[data-theme="dark"] header { background: rgba(245,245,250,0.85); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
}
.logo svg { width:40px; height:40px; }
.nav { display:flex; gap:25px; align-items:center; }
.nav a {
  color: var(--text);
  font-size:15px;
  font-weight:500;
  position:relative;
  padding:5px 0;
}
.nav a::after {
  content:'';
  position:absolute;
  bottom:0; left:0;
  width:0; height:2px;
  background: var(--accent);
  transition: width 0.3s;
}
.nav a:hover::after, .nav a.active::after { width:100%; }
.nav a.active { color: var(--accent); }
.menu-toggle { display:none; flex-direction:column; gap:5px; cursor:pointer; background:none; border:none; padding:5px; }
.menu-toggle span { width:28px; height:3px; background: var(--text); border-radius:3px; transition:all 0.3s; }
.theme-toggle {
  background: none;
  border: 2px solid var(--glass-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  font-size: 18px;
  transition: all 0.3s;
}
.theme-toggle:hover { border-color: var(--accent); }
.banner {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 20px 60px;
  position: relative;
  overflow: hidden;
}
.banner-bg {
  position: absolute;
  inset:0;
  z-index:0;
  background: radial-gradient(ellipse at 30% 50%, rgba(233,69,96,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(245,166,35,0.1) 0%, transparent 60%);
}
.banner-content { position:relative; z-index:1; max-width:800px; }
.banner h1 { margin-bottom:20px; }
.banner p { font-size:18px; margin-bottom:30px; opacity:0.9; max-width:600px; margin-left:auto; margin-right:auto; }
.banner-buttons { display:flex; gap:15px; justify-content:center; flex-wrap:wrap; }
.banner-carousel {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
}
.carousel-slide {
  position: absolute;
  inset:0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity:0;
  transition: opacity 1s ease;
  pointer-events:none;
}
.carousel-slide.active { opacity:1; pointer-events:auto; position:relative; }
.carousel-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}
.carousel-indicators button {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s;
}
.carousel-indicators button.active { background: var(--accent); transform: scale(1.2); }
.about-grid { display:grid; grid-template-columns: 1fr 1fr; gap:50px; align-items:center; }
.about-text p { margin-bottom:15px; }
.stats-grid { display:grid; grid-template-columns: repeat(4,1fr); gap:20px; margin-top:40px; }
.stat-item { text-align:center; padding:20px; }
.stat-number { font-size:2.8rem; font-weight:800; color: var(--accent); }
.stat-label { font-size:14px; opacity:0.8; margin-top:5px; }
.timeline { position:relative; padding-left:30px; }
.timeline::before {
  content:'';
  position:absolute;
  left:8px; top:0; bottom:0;
  width:3px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2));
}
.timeline-item { position:relative; margin-bottom:30px; padding-left:20px; }
.timeline-item::before {
  content:'';
  position:absolute;
  left:-26px; top:6px;
  width:16px; height:16px;
  border-radius:50%;
  background: var(--accent);
  border:3px solid var(--bg);
}
.timeline-year { font-weight:700; color: var(--accent2); font-size:18px; }
.team-grid .card { text-align:center; }
.team-avatar { width:80px; height:80px; border-radius:50%; margin:0 auto 15px; background: var(--accent); display:flex; align-items:center; justify-content:center; font-size:32px; font-weight:700; color:#fff; }
.product-card { text-align:center; }
.product-icon { width:64px; height:64px; margin:0 auto 15px; }
.service-list { display:grid; grid-template-columns: repeat(auto-fit, minmax(250px,1fr)); gap:20px; }
.faq-item { border-bottom:1px solid var(--glass-border); padding:18px 0; cursor:pointer; }
.faq-question { display:flex; justify-content:space-between; align-items:center; font-weight:600; font-size:17px; }
.faq-question svg { transition: transform 0.3s; flex-shrink:0; }
.faq-item.open .faq-question svg { transform: rotate(180deg); }
.faq-answer { max-height:0; overflow:hidden; transition: max-height 0.5s ease, padding 0.3s; padding-top:0; }
.faq-item.open .faq-answer { max-height:500px; padding-top:15px; }
.howto-steps { counter-reset: step; }
.howto-step { display:flex; gap:20px; margin-bottom:30px; align-items:flex-start; }
.howto-step-num { counter-increment: step; width:40px; height:40px; border-radius:50%; background: var(--accent); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; flex-shrink:0; }
.news-card img, .news-card svg { width:100%; height:200px; object-fit:cover; border-radius:12px; margin-bottom:15px; }
.news-date { font-size:13px; opacity:0.6; }
.news-card h3 { margin:10px 0; }
.news-card p { font-size:14px; opacity:0.85; }
.testimonial-card { text-align:center; }
.testimonial-stars { color: var(--accent2); font-size:20px; margin-bottom:10px; }
.contact-grid { display:grid; grid-template-columns: 1fr 1fr; gap:40px; }
.contact-info p { margin-bottom:10px; display:flex; align-items:center; gap:10px; }
.contact-info svg { width:20px; height:20px; flex-shrink:0; }
.qr-grid { display:flex; gap:30px; justify-content:center; flex-wrap:wrap; }
.qr-item { text-align:center; }
.qr-item svg { width:120px; height:120px; border-radius:12px; background:#fff; padding:8px; margin-bottom:10px; }
footer {
  background: var(--primary);
  padding: 60px 0 30px;
  border-top: 1px solid var(--glass-border);
}
.footer-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap:30px; margin-bottom:40px; }
.footer-grid h4 { margin-bottom:15px; font-size:16px; }
.footer-grid a, .footer-grid p { font-size:14px; opacity:0.8; display:block; margin-bottom:8px; }
.footer-bottom { border-top:1px solid var(--glass-border); padding-top:20px; text-align:center; font-size:13px; opacity:0.7; }
.footer-links { display:flex; flex-wrap:wrap; gap:15px; justify-content:center; margin-bottom:15px; }
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s;
  box-shadow: 0 4px 20px rgba(233,69,96,0.4);
}
.back-to-top.show { opacity:1; transform: translateY(0); }
.search-modal {
  position: fixed;
  inset:0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity:0;
  pointer-events:none;
  transition: opacity 0.4s;
}
.search-modal.open { opacity:1; pointer-events:auto; }
.search-modal-content { background: var(--bg); padding:40px; border-radius: var(--radius); width:90%; max-width:500px; }
.search-modal input { width:100%; padding:15px 20px; border:2px solid var(--glass-border); border-radius:50px; background:transparent; color:var(--text); font-size:16px; outline:none; }
.search-modal input:focus { border-color: var(--accent); }
.search-results { margin-top:20px; max-height:300px; overflow-y:auto; }
.search-results div { padding:10px 0; border-bottom:1px solid var(--glass-border); cursor:pointer; }
.search-results div:hover { color: var(--accent); }
@media (max-width: 768px) {
  .nav { display:none; position:absolute; top:70px; left:0; right:0; background:var(--bg); flex-direction:column; padding:20px; gap:15px; border-bottom:1px solid var(--glass-border); }
  .nav.open { display:flex; }
  .menu-toggle { display:flex; }
  .about-grid { grid-template-columns:1fr; }
  .stats-grid { grid-template-columns:repeat(2,1fr); }
  .contact-grid { grid-template-columns:1fr; }
  .banner h1 { font-size:2rem; }
  .section { padding:50px 0; }
  .footer-grid { grid-template-columns:repeat(2,1fr); }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns:1fr 1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .banner-buttons { flex-direction:column; align-items:center; }
}