/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #f4a261;
    --accent-gold: #ffd700;
    --accent-green: #2ecc71;
    --text-light: #ffffff;
    --text-gray: #b8b8b8;
    --border-color: #333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 2rem;
    color: var(--accent-gold);
    font-weight: bold;
    margin-bottom: 0.2rem;
}

.tagline {
    font-size: 0.9rem;
    color: var(--text-gray);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-list a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--accent-gold);
}

.nav-list a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gold);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 50%, #16213e 100%);
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent-gold);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(244, 162, 97, 0.2);
    border-color: var(--accent-color);
}

.feature-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.feature-item h3 {
    color: var(--accent-gold);
    margin-bottom: 0.5rem;
}

.hero-image {
    margin-top: 2rem;
}

.hero-image img {
    width: 100%;
    max-width: 800px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

/* Sections */
section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--accent-gold);
}

.section-description {
    text-align: center;
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Sports Betting */
.sports-betting {
    background: rgba(22, 33, 62, 0.3);
}

.sports-grid,
.casino-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.sport-card,
.casino-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.sport-card:hover,
.casino-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(244, 162, 97, 0.3);
    border-color: var(--accent-color);
}

.sport-card img,
.casino-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.sport-card h3,
.casino-card h3 {
    padding: 1rem;
    color: var(--accent-gold);
    font-size: 1.3rem;
}

.sport-card p,
.casino-card p {
    padding: 0 1rem 1.5rem;
    color: var(--text-gray);
}

/* Casino Section */
.casino-section {
    background: rgba(15, 15, 30, 0.5);
}

/* Bonus Section */
.bonus-section {
    background: rgba(22, 33, 62, 0.3);
}

.bonus-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.bonus-item {
    background: linear-gradient(135deg, rgba(244, 162, 97, 0.1) 0%, rgba(255, 215, 0, 0.1) 100%);
    padding: 2rem;
    border-radius: 10px;
    border: 2px solid var(--accent-gold);
    text-align: center;
}

.bonus-item h3 {
    color: var(--accent-gold);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.bonus-item p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Why Choose */
.why-choose {
    background: rgba(15, 15, 30, 0.5);
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.reason-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.3s;
}

.reason-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-green);
}

.reason-item h3 {
    color: var(--accent-green);
    margin-bottom: 1rem;
}

.reason-item p {
    color: var(--text-gray);
}

/* Footer */
.footer {
    background: #0a0a15;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-gray);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: var(--accent-gold);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: rgba(26, 26, 46, 0.98);
        width: 100%;
        padding: 2rem;
        transition: left 0.3s;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
    }

    .nav-list.active {
        left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-features {
        grid-template-columns: 1fr;
    }

    .sports-grid,
    .casino-grid,
    .bonus-list,
    .reasons-grid {
        grid-template-columns: 1fr;
    }

    .logo h1 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    section {
        padding: 2rem 0;
    }
}

/* SEO优化 - 图片懒加载样式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 可访问性 */
a:focus,
button:focus {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}