/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 赌场奢华配色 */
    --primary-gold: #FFD700;
    --deep-gold: #B8860B;
    --luxury-black: #000000;
    --rich-red: #8B0000;
    --champagne: #F7E7CE;
    --diamond-white: #FFFFFF;
    --royal-purple: #4B0082;
    --emerald-green: #50C878;
    --casino-green: #0F5132;
    
    /* 渐变色 */
    --gold-gradient: linear-gradient(135deg, #FFD700 0%, #B8860B 100%);
    --black-gold-gradient: linear-gradient(135deg, #000000 0%, #333333 50%, #FFD700 100%);
    --red-gradient: linear-gradient(135deg, #8B0000 0%, #DC143C 100%);
    --green-gradient: linear-gradient(135deg, #0F5132 0%, #50C878 100%);
    
    /* 字体 */
    --font-primary: 'Arial', 'Microsoft YaHei', sans-serif;
    --font-secondary: 'Georgia', serif;
    
    /* 尺寸 */
    --container-max-width: 1200px;
    --border-radius: 8px;
    --border-radius-large: 16px;
    
    /* 阴影效果 */
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
    --shadow-red: 0 4px 20px rgba(139, 0, 0, 0.3);
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--diamond-white);
    background: var(--luxury-black);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.8) 100%);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 2px solid var(--primary-gold);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-logo h1 {
    font-size: 2.5rem;
    font-weight: bold;
    text-shadow: 0 0 20px var(--primary-gold);
}

.logo-789 {
    color: var(--primary-gold);
    text-shadow: 0 0 10px var(--primary-gold);
}

.logo-bet {
    color: var(--diamond-white);
    text-shadow: 0 0 10px var(--diamond-white);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: var(--diamond-white);
    text-decoration: none;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-link:hover {
    color: var(--primary-gold);
    background: rgba(255, 215, 0, 0.1);
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gold-gradient);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

.nav-actions {
    display: flex;
    gap: 15px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-gold);
    transition: all 0.3s ease;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gold-gradient);
    color: var(--luxury-black);
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.4);
}

.btn-secondary {
    background: var(--red-gradient);
    color: var(--diamond-white);
    box-shadow: var(--shadow-red);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 0, 0, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary-gold);
    border: 2px solid var(--primary-gold);
}

.btn-outline:hover {
    background: var(--primary-gold);
    color: var(--luxury-black);
    transform: translateY(-2px);
}

.btn-register {
    background: var(--green-gradient);
    color: var(--diamond-white);
}

.btn-login {
    background: transparent;
    color: var(--primary-gold);
    border: 2px solid var(--primary-gold);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.btn-small {
    padding: 8px 20px;
    font-size: 0.9rem;
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(45deg, #000000 0%, #1a1a1a 50%, #000000 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../assets/imgs/casino_bg.png') center/cover no-repeat;
    opacity: 0.3;
    z-index: -2;
}

.hero-background {
    position: relative;
    width: 100%;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(255, 215, 0, 0.1) 0%, rgba(0, 0, 0, 0.8) 70%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    padding: 100px 20px 50px;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    animation: slideInDown 1s ease-out;
}

.hero-title .highlight {
    color: var(--primary-gold);
    text-shadow: 0 0 30px var(--primary-gold);
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--champagne);
    font-weight: 300;
    animation: slideInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    animation: fadeIn 1s ease-out 0.4s both;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 50px;
    animation: slideInUp 1s ease-out 0.6s both;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeIn 1s ease-out 0.8s both;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px;
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: var(--border-radius-large);
    backdrop-filter: blur(10px);
}

.feature-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 10px var(--primary-gold));
}

/* ===== SECTIONS ===== */
section {
    padding: 80px 0;
    position: relative;
}

section:nth-child(even) {
    background: linear-gradient(135deg, rgba(139, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.8) 100%);
}

section:nth-child(odd) {
    background: linear-gradient(135deg, rgba(75, 0, 130, 0.1) 0%, rgba(0, 0, 0, 0.8) 100%);
}

.section-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 60px;
    color: var(--diamond-white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gold-gradient);
    border-radius: 2px;
}

.section-title .highlight {
    color: var(--primary-gold);
    text-shadow: 0 0 20px var(--primary-gold);
}

/* ===== WHY CHOOSE SECTION ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.advantage-card {
    background: linear-gradient(145deg, rgba(255, 215, 0, 0.1) 0%, rgba(0, 0, 0, 0.8) 100%);
    border: 2px solid rgba(255, 215, 0, 0.3);
    border-radius: var(--border-radius-large);
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.advantage-card:hover::before {
    opacity: 1;
}

.advantage-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-gold);
    box-shadow: 0 20px 40px rgba(255, 215, 0, 0.2);
}

.advantage-icon {
    margin-bottom: 25px;
}

.advantage-icon img {
    width: 80px;
    height: 80px;
    filter: drop-shadow(0 0 15px var(--primary-gold));
}

.advantage-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-gold);
    text-shadow: 0 0 10px var(--primary-gold);
}

.advantage-card p {
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
}

/* ===== PRODUCTS SECTION ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.product-card {
    background: linear-gradient(145deg, rgba(139, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.9) 100%);
    border: 2px solid rgba(139, 0, 0, 0.3);
    border-radius: var(--border-radius-large);
    overflow: hidden;
    transition: all 0.4s ease;
    position: relative;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-15px) scale(1.02);
    border-color: var(--primary-gold);
    box-shadow: 0 25px 50px rgba(255, 215, 0, 0.3);
}

.product-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-content {
    padding: 30px;
}

.product-content h3 {
    font-size: 1.6rem;
    margin-bottom: 15px;
    color: var(--primary-gold);
    text-shadow: 0 0 10px var(--primary-gold);
}

.product-content p {
    line-height: 1.7;
    margin-bottom: 25px;
    color: rgba(255, 255, 255, 0.9);
}

/* ===== GUIDE SECTION ===== */
.guide-steps {
    display: grid;
    gap: 30px;
    margin: 50px 0;
}

.guide-step {
    display: flex;
    gap: 30px;
    align-items: flex-start;
    background: linear-gradient(135deg, rgba(80, 200, 120, 0.1) 0%, rgba(0, 0, 0, 0.8) 100%);
    border: 2px solid rgba(80, 200, 120, 0.3);
    border-radius: var(--border-radius-large);
    padding: 40px;
    transition: all 0.3s ease;
}

.guide-step:hover {
    transform: translateX(10px);
    border-color: var(--emerald-green);
    box-shadow: 0 10px 30px rgba(80, 200, 120, 0.2);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--green-gradient);
    color: var(--diamond-white);
    font-size: 2rem;
    font-weight: bold;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 20px rgba(80, 200, 120, 0.3);
}

.step-content h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--emerald-green);
    text-shadow: 0 0 10px var(--emerald-green);
}

.step-content p {
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
}

.guide-cta {
    text-align: center;
    margin-top: 50px;
}

/* ===== PROMOTIONS SECTION ===== */
.promotions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.promotion-card {
    background: linear-gradient(145deg, rgba(75, 0, 130, 0.2) 0%, rgba(0, 0, 0, 0.9) 100%);
    border: 2px solid rgba(75, 0, 130, 0.3);
    border-radius: var(--border-radius-large);
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.promotion-card:hover {
    transform: translateY(-10px);
    border-color: var(--royal-purple);
    box-shadow: 0 20px 40px rgba(75, 0, 130, 0.3);
}

.promotion-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px var(--primary-gold));
}

.promotion-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary-gold);
    text-shadow: 0 0 10px var(--primary-gold);
}

.promotion-card p {
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}

.promotions-cta {
    text-align: center;
    margin-top: 50px;
}

/* ===== APP DOWNLOAD SECTION ===== */
.app-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.app-text h2 {
    font-size: 2.5rem;
    margin-bottom: 25px;
    color: var(--primary-gold);
    text-shadow: 0 0 15px var(--primary-gold);
}

.app-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.9);
}

.app-features {
    margin-bottom: 40px;
}

.app-feature {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.feature-check {
    color: var(--emerald-green);
    font-weight: bold;
    font-size: 1.2rem;
}

.app-image img {
    width: 100%;
    max-width: 400px;
    filter: drop-shadow(0 0 30px rgba(255, 215, 0, 0.3));
}

/* ===== CONTACT SECTION ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.contact-card {
    background: linear-gradient(145deg, rgba(139, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.9) 100%);
    border: 2px solid rgba(139, 0, 0, 0.3);
    border-radius: var(--border-radius-large);
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-10px);
    border-color: var(--rich-red);
    box-shadow: 0 20px 40px rgba(139, 0, 0, 0.3);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 25px;
    filter: drop-shadow(0 0 15px var(--primary-gold));
}

.contact-card h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-gold);
    text-shadow: 0 0 10px var(--primary-gold);
}

.contact-card p {
    line-height: 1.8;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.9);
}

.contact-methods p {
    margin-bottom: 10px;
    font-weight: 500;
}

.contact-methods strong {
    color: var(--primary-gold);
}

/* ===== FOOTER ===== */
.footer {
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #000000 100%);
    border-top: 3px solid var(--primary-gold);
    padding: 60px 0 20px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gold-gradient);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    color: var(--primary-gold);
    text-shadow: 0 0 10px var(--primary-gold);
    margin-bottom: 20px;
}

.footer-section h4 {
    color: var(--primary-gold);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    color: var(--diamond-white);
    text-decoration: none;
    padding: 10px 15px;
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.social-link:hover {
    color: var(--primary-gold);
    border-color: var(--primary-gold);
    background: rgba(255, 215, 0, 0.1);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 215, 0, 0.3);
    padding-top: 30px;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ===== ANIMATIONS ===== */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translate3d(0, -100%, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 100%, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 20px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
    
    .app-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 0.95);
        flex-direction: column;
        padding: 20px;
        border-top: 2px solid var(--primary-gold);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-actions {
        gap: 10px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-step {
        flex-direction: column;
        text-align: center;
    }
    
    .promotions-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
    }
    
    .advantage-card,
    .product-card,
    .promotion-card,
    .contact-card {
        padding: 25px;
    }
    
    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
    
    .btn-large {
        padding: 15px 30px;
        font-size: 1rem;
    }
}