/* ===== 九游体育APP - style.css ===== */
/* 全局重置 & 变量 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #e94560;
  --primary-dark: #c23152;
  --secondary: #0f3460;
  --accent: #16213e;
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-light: #555555;
  --border: #e0e0e0;
  --shadow: 0 8px 32px rgba(0,0,0,0.08);
  --radius: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(255,255,255,0.7);
  --glass-border: rgba(255,255,255,0.3);
  --max-width: 1200px;
  --header-height: 70px;
}
[data-theme="dark"] {
  --bg: #0d0d1a;
  --card-bg: #1a1a2e;
  --text: #f0f0f0;
  --text-light: #bbbbbb;
  --border: #2a2a4a;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --glass-bg: rgba(26,26,46,0.7);
  --glass-border: rgba(255,255,255,0.08);
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img, svg { max-width: 100%; display: block; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 50px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 30px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }
.btn {
  display: inline-block;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(233,69,96,0.3);
  text-align: center;
}
.btn:hover { transform: scale(1.05); box-shadow: 0 6px 30px rgba(233,69,96,0.4); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  box-shadow: none;
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.3rem;
  transition: background var(--transition), color var(--transition);
}
/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
}
.logo svg { width: 40px; height: 40px; }
nav { display: flex; align-items: center; gap: 30px; }
nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 5px 0;
}
nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}
nav a:hover::after, nav a.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 15px; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 5px; }
.hamburger span { display: block; width: 26px; height: 2.5px; background: var(--text); border-radius: 4px; transition: var(--transition); }
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card-bg);
  flex-direction: column;
  padding: 30px 20px;
  gap: 20px;
  z-index: 999;
  overflow-y: auto;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 1.2rem; padding: 10px 0; border-bottom: 1px solid var(--border); }
/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 20px 80px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--secondary) 50%, #0a0a23 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(233,69,96,0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(15,52,96,0.2) 0%, transparent 50%);
  animation: heroGlow 15s ease-in-out infinite alternate;
}
@keyframes heroGlow { 0% { transform: translate(0,0); } 100% { transform: translate(-5%, -5%); } }
.hero-content { position: relative; z-index: 2; max-width: 800px; }
.hero h1 {
  font-size: 3.2rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.2;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.hero p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.hero-buttons { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.hero .btn { font-size: 1.1rem; padding: 16px 44px; }
.hero .btn-outline { border-color: rgba(255,255,255,0.6); color: #fff; }
.hero .btn-outline:hover { background: rgba(255,255,255,0.15); }
/* Carousel */
.carousel { position: relative; overflow: hidden; border-radius: var(--radius); }
.carousel-inner { display: flex; transition: transform 0.6s ease; }
.carousel-item { min-width: 100%; }
.carousel-item img, .carousel-item svg { width: 100%; height: 400px; object-fit: cover; border-radius: var(--radius); }
.carousel-controls { position: absolute; top: 50%; width: 100%; display: flex; justify-content: space-between; transform: translateY(-50%); padding: 0 20px; pointer-events: none; }
.carousel-btn { pointer-events: auto; background: rgba(0,0,0,0.4); color: #fff; border: none; width: 48px; height: 48px; border-radius: 50%; cursor: pointer; font-size: 1.5rem; transition: background var(--transition); display: flex; align-items: center; justify-content: center; }
.carousel-btn:hover { background: rgba(0,0,0,0.7); }
.carousel-dots { display: flex; justify-content: center; gap: 10px; margin-top: 20px; }
.carousel-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--border); cursor: pointer; transition: background var(--transition), transform var(--transition); }
.carousel-dot.active { background: var(--primary); transform: scale(1.3); }
/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-card { text-align: center; padding: 30px 20px; }
.stat-number { font-size: 2.8rem; font-weight: 900; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.2; }
.stat-label { color: var(--text-light); margin-top: 8px; font-size: 1rem; }
/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); padding: 18px 0; cursor: pointer; }
.faq-question { display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 1.1rem; }
.faq-question span { transition: transform var(--transition); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; padding-top: 0; color: var(--text-light); }
.faq-item.open .faq-answer { max-height: 300px; padding-top: 15px; }
.faq-item.open .faq-question span { transform: rotate(45deg); }
/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
  box-shadow: 0 4px 20px rgba(233,69,96,0.3);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: transform var(--transition), opacity var(--transition);
}
.back-to-top.visible { display: flex; }
.back-to-top:hover { transform: scale(1.1); }
/* Footer */
footer {
  background: var(--accent);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 30px;
}
footer a { color: rgba(255,255,255,0.7); }
footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand p { margin-top: 15px; max-width: 300px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 40px; padding-top: 20px; text-align: center; font-size: 0.9rem; }
/* Breadcrumb */
.breadcrumb { display: flex; gap: 10px; padding: 15px 0; font-size: 0.9rem; color: var(--text-light); flex-wrap: wrap; }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text); }
/* Search */
.search-bar { display: flex; gap: 10px; max-width: 500px; margin: 30px auto; }
.search-bar input { flex: 1; padding: 14px 20px; border: 2px solid var(--border); border-radius: 50px; background: var(--card-bg); color: var(--text); font-size: 1rem; outline: none; transition: border var(--transition); }
.search-bar input:focus { border-color: var(--primary); }
.search-bar button { padding: 14px 28px; border-radius: 50px; }
/* Responsive */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  nav a { display: none; }
  .hamburger { display: flex; }
  .hero h1 { font-size: 2.2rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .section-title { font-size: 1.8rem; }
  .carousel-item img, .carousel-item svg { height: 250px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .stat-number { font-size: 2rem; }
  .btn { padding: 12px 28px; font-size: 0.9rem; }
}
/* Scroll animation */
.fade-in { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
/* Additional EEAT / content polish */
.text-center { text-align: center; }
h1, h2, h3, h4 { line-height: 1.3; }
ul { list-style: none; }
input, textarea { font-family: inherit; }
/* Gradient banner support for dark mode */
[data-theme="dark"] .section-title {
  background: linear-gradient(135deg, var(--primary), #4a8cff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
/* Ensure SVGs in cards have rounded corners */
.card svg { border-radius: 14px; }