/* 
  球速体育 - 官方样式表 
  风格：高端黑金 (Light Black Gold)
*/

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Oswald:wght@400;600&display=swap');

:root {
  --bg-dark: #0a0a0a;
  --bg-card: #141414;
  --gold-primary: #d4af37;
  --gold-light: #f1d592;
  --gold-dark: #aa8a2e;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --accent-gold: rgba(212, 175, 55, 0.2);
  --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: 'Noto Sans SC', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, .brand-font {
  font-family: 'Oswald', sans-serif;
  text-transform: uppercase;
  letter-spacing: 2px;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.5rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--accent-gold);
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gold-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 1rem;
  font-weight: 500;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold-primary);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--gold-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.btn-cta {
  background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
  color: black;
  padding: 0.6rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(212, 175, 55, 0.4);
}

/* Hero Section */
.hero {
  height: 100vh;
  background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://tse-mm.bing.com/th?q=体育馆') center/cover;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 10%;
}

.hero h1 {
  font-size: 4.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(to right, var(--gold-light), var(--gold-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2rem;
}

/* Sections */
section {
  padding: 6rem 10%;
}

.section-title {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title h2 {
  font-size: 2.5rem;
  position: relative;
  display: inline-block;
  padding-bottom: 10px;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--gold-primary);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 2rem;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--gold-primary);
  transform: translateY(-10px);
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  cursor: pointer;
}

/* Stats */
.stats-container {
  display: flex;
  justify-content: space-around;
  background: var(--bg-card);
  padding: 3rem;
  border-radius: 12px;
  border: 1px solid var(--accent-gold);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--gold-primary);
  display: block;
}

.stat-label {
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.9rem;
}

/* News List */
.news-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid rgba(212, 175, 55, 0.1);
}

.news-item img {
  width: 120px;
  height: 80px;
  object-fit: cover;
}

.news-content h4 {
  color: var(--gold-primary);
  margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 3rem; }
  .nav-links { display: none; }
  header { padding: 1rem 5%; }
  section { padding: 4rem 5%; }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--gold-dark);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gold-primary);
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
footer {
  background: #050505;
  padding: 4rem 10% 2rem;
  border-top: 1px solid var(--accent-gold);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  color: var(--gold-primary);
  margin-bottom: 1.5rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  font-size: 0.8rem;
  color: var(--text-secondary);
}