/* ============================================
   Online Casino Website - Main Stylesheet
   Mobile-First Responsive Design
   ============================================ */

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

:root {
    /* Color Scheme - Dark Theme with Gold Accents */
    --bg-primary: #0a0e1a;
    --bg-secondary: #141b2d;
    --bg-tertiary: #1a2332;
    --accent-gold: #ffd700;
    --accent-gold-dark: #ffb700;
    --accent-neon: #00ff88;
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #9ca8b8;
    --border-color: #2a3441;
    --success: #00ff88;
    --warning: #ffaa00;
    --error: #ff4444;
    
    /* Typography */
    --font-primary: 'Inter', 'Segoe UI', -apple-system, sans-serif;
    --font-heading: 'Poppins', 'Arial', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

a {
    color: var(--accent-gold);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-gold-dark);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-wide {
    max-width: 1400px;
}

/* Header - 以 casino 为准，全站导航统一使用固定像素字号 */
.header {
    background: linear-gradient(180deg, rgba(10, 14, 26, 0.95) 0%, rgba(20, 27, 45, 0.95) 100%);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

/* 导航菜单与按钮统一使用固定 px，不依赖根字号 */
.header .nav-link {
    font-size: 16px;
}

.header .header-actions .btn {
    font-size: 14px;
}

.header .dropdown-menu .nav-link {
    font-size: 14px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    line-height: 0;
    margin-right: var(--spacing-md);
    z-index: 2;
}

.logo img {
    display: block;
    height: 44px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
    object-position: left center;
}

/* Navigation */
.nav {
    display: none;
}

.nav.active {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin-top: var(--spacing-md);
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
    border-radius: 4px;
}

.nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--accent-gold);
}

/* 导航菜单选中/当前页效果 */
.nav-link.active {
    color: var(--accent-gold);
    background: rgba(255, 215, 0, 0.12);
    font-weight: 600;
}

.nav-item.has-dropdown.active > .nav-link.dropdown-toggle {
    color: var(--accent-gold);
    background: rgba(255, 215, 0, 0.12);
    font-weight: 600;
}

.dropdown-menu .nav-link.active {
    color: var(--accent-gold);
    background: rgba(255, 215, 0, 0.15);
    font-weight: 600;
}

/* 点击瞬间反馈 */
.nav-link:active {
    background: var(--bg-tertiary);
    opacity: 0.9;
}

/* Dropdown Menu */
.nav-item.has-dropdown {
    position: relative;
}

.dropdown-toggle::after {
    content: ' ▼';
    font-size: 0.7em;
    margin-left: 0.25rem;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-width: 200px;
    padding: var(--spacing-xs) 0;
    padding-top: calc(var(--spacing-xs) + 4px);
    margin-top: -4px;
    margin-left: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    list-style: none;
    padding-left: 0;
}

.dropdown-menu li {
    list-style: none;
}

/* 创建一个透明的桥接区域，使鼠标可以顺利移动到下拉菜单 */
.nav-item.has-dropdown::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 4px;
    background: transparent;
    z-index: 1001;
}

.nav-item:hover .dropdown-menu,
.nav-item.active .dropdown-menu {
    display: block;
}

/* 点击二级菜单后立即收回，避免挡住下方内容 */
.nav-item.has-dropdown.dropdown-just-closed .dropdown-menu {
    display: none !important;
}

.dropdown-menu .nav-link {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 0;
}

.dropdown-menu .nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--accent-gold);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
}

/* Header Actions */
.header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-shrink: 0;
    margin-left: var(--spacing-sm);
    z-index: 2;
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 6px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dark) 100%);
    color: var(--bg-primary);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

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

.btn-secondary:hover {
    background: var(--accent-gold);
    color: var(--bg-primary);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

/* Hero Section - 板块间距收紧 */
.hero {
    position: relative;
    padding: var(--spacing-lg) 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 215, 0, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-neon) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

/* Section - 板块间距收紧 */
.section {
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
}

.section:last-child {
    margin-bottom: 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-title h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.card {
    background: var(--bg-tertiary) !important;
    border-radius: 12px;
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-gold);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.2);
}

.card-image {
    width: 100%;
    height: 200px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card-text {
    color: #e0e8f2;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

/* 卡片内小字信息行（有效期/代码等）统一提高对比度 */
.card .card-text-meta {
    color: #9ee6c0 !important;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

/* 各页顶部英雄卡在深色背景下统一使用浅色文字 */
.section-hero-card .card h2,
.section-hero-card .card p {
    color: var(--text-primary);
}
.section-hero-card .card .hero-card-meta {
    color: #e0e8f2;
    font-size: 1rem;
}

/* 优惠页 - 新玩家欢迎奖励卡片（深色主题下文字可读） */
.promo-welcome-card .promo-welcome-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 2rem;
}
.promo-welcome-card .promo-welcome-amount {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}
.promo-welcome-card .promo-welcome-desc {
    color: #e0e8f2;
    font-size: 1.05rem;
    line-height: 1.65;
    margin-bottom: var(--spacing-lg);
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
}
.promo-welcome-card .promo-welcome-btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.6);
}
.promo-welcome-card .promo-welcome-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent-gold);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive Gaming Notice */
.responsible-gaming {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
    text-align: center;
    border-left: 4px solid var(--warning);
}

.responsible-gaming p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-gold { color: var(--accent-gold); }
.text-neon { color: var(--accent-neon); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* Responsive Design - Tablet */
@media (min-width: 768px) {
    html { font-size: 17px; }
    
    .header .nav-link {
        font-size: 17px;
    }
    
    .header .header-actions .btn {
        font-size: 15px;
    }
    
    .header .dropdown-menu .nav-link {
        font-size: 15px;
    }
    
    h1 { font-size: 3rem; }
    h2 { font-size: 2.5rem; }
    
    .logo {
        margin-right: var(--spacing-lg);
    }
    
    .logo img {
        height: 52px;
        max-width: 200px;
    }
    
    .nav {
        display: flex;
        flex-direction: row;
        flex: 1;
        justify-content: center;
        align-items: center;
        margin-top: 0;
        min-width: 0;
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
        order: 1;
    }
    
    .nav-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-xs);
        align-items: center;
        justify-content: center;
        margin: 0;
        padding: 0;
    }
    
    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        white-space: nowrap;
    }
    
    .header-actions {
        margin-left: var(--spacing-md);
    }
    
    .menu-toggle {
        display: none;
    }
    
    .dropdown-menu {
        position: absolute;
    }
    
    /* 桌面端：当前页高亮(.active)不展开下拉，仅悬停时展开，跳转后为收起状态 */
    .nav-item.has-dropdown.active .dropdown-menu {
        display: none;
    }
    .nav-item.has-dropdown:hover .dropdown-menu {
        display: block;
    }
    
    .nav.active .nav-list {
        flex-direction: column;
    }
    
    .nav.active .dropdown-menu {
        position: static;
        display: block;
        margin-left: var(--spacing-md);
        box-shadow: none;
        border: none;
        background: var(--bg-tertiary);
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Responsive Design - Desktop */
@media (min-width: 1024px) {
    html { font-size: 18px; }
    
    .header .nav-link {
        font-size: 18px;
    }
    
    .header .header-actions .btn {
        font-size: 16px;
    }
    
    .header .dropdown-menu .nav-link {
        font-size: 16px;
    }
    
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .section {
        padding: var(--spacing-lg) 0;
        margin-bottom: var(--spacing-lg);
    }
    
    .section:last-child {
        margin-bottom: 0;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* FAQ Accordion Styles */
.faq-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all var(--transition-normal);
}
.faq-item.active {
    border-color: var(--accent-gold);
}
.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--text-primary);
}
.faq-question:hover {
    background: var(--bg-tertiary);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1.5rem;
}
.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
}
.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}
.faq-icon {
    transition: transform 0.3s ease;
}
.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

/* Game Filters */
.game-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
    justify-content: center;
}
.filter-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}
.filter-btn:hover, .filter-btn.active {
    background: var(--accent-gold);
    color: var(--bg-primary);
    border-color: var(--accent-gold);
}
.search-bar {
    max-width: 500px;
    margin: 0 auto 2rem;
}
.game-card {
    cursor: pointer;
    transition: transform 0.3s ease;
}
.game-card:hover {
    transform: scale(1.05);
}