@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

:root {
    --bg-dark: #0a0a0a;
    --bg-card: #151515;
    --gold-primary: #d4af37;
    --gold-secondary: #f4cf6d;
    --text-white: #f5f5f5;
    --text-gray: #a0a0a0;
    --border-color: #2a2a2a;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    font-family: 'Inter', "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
li { list-style: none; }

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)),
                url('https://tse-mm.bing.com/th?q=体育直播场馆') no-repeat center/cover;
    padding: 0 5%;
}

.hero h1 {
    font-size: 3.5rem;
    color: var(--gold-primary);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin-bottom: 2rem;
    color: var(--text-white);
}

.btn-primary {
    background: var(--gold-primary);
    color: var(--bg-dark);
    padding: 1rem 2.5rem;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--gold-secondary);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
}

/* Section Common Styles */
section { padding: 5rem 10%; }
h2.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--gold-primary);
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

h2.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--gold-primary);
}

/* Grid Layouts */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--gold-primary);
    transform: translateY(-5px);
}

/* Matches Page Specifics */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 3rem;
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    align-items: center;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

select, input {
    background: #202020;
    border: 1px solid var(--border-color);
    color: white;
    padding: 0.8rem;
    border-radius: 4px;
    outline: none;
}

select:focus, input:focus {
    border-color: var(--gold-primary);
}

/* Footer */
footer {
    background: #050505;
    border-top: 1px solid var(--border-color);
    padding: 4rem 10% 2rem;
    margin-top: 5rem;
}

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

.footer-section h4 {
    color: var(--gold-primary);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
    color: var(--text-gray);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    section { padding: 3rem 5%; }
    .hero h1 { font-size: 2.2rem; }
    .nav-links { display: none; } /* Simplified for demo */
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}