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

:root {
    /* Colors */
    --primary-color: #c58000;
    --primary-dark: #7e5600;
    --secondary-color: #2196F3;
    --secondary-dark: #1976D2;
    --accent-color: #FFD700;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --error-color: #F44336;

    /* Background Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: rgba(0, 0, 0, 0.8);
    --bg-card: rgba(0, 0, 0, 0.3);
    --bg-overlay: rgba(0, 0, 0, 0.5);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.4);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(135deg, rgba(197, 128, 0, 0.1) 0%, rgba(0, 0, 0, 0.8) 100%),
        url('../image/dark-bg.jpg') center/cover no-repeat;
    opacity: 0.3;
    z-index: -1;
    pointer-events: none;
}

/* ===== ACCESSIBILITY ===== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ===== HEADER ===== */
.header {
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--primary-color);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
}

.logo img {
    height: 50px;
    width: auto;
    transition: transform var(--transition-normal);
}

.logo:hover img {
    transform: scale(1.05);
}

.main-nav .nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-btn.primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.nav-btn.secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition-normal);
}

/* PC端完全隐藏移动菜单关闭按钮 */
.mobile-menu-close {
    display: none !important;
}

/* ===== HERO SECTION ===== */
.hero-section {
    margin-bottom: var(--spacing-xl);
}

.banner-slider {
    position: relative;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.slider-container {
    position: relative;
    width: 100%;
}

.slides {
    position: relative;
    width: 100%;
    min-height: 300px;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.slide.active {
    position: relative;
    opacity: 1;
    visibility: visible;
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* 确保轮播图容器有最小高度 */
.slides {
    min-height: 200px;
}

@media (max-width: 768px) {
    .slides {
        min-height: 150px;
    }

    .slide img {
        border-radius: var(--radius-md);
    }
}

@media (max-width: 480px) {
    .slides {
        min-height: 120px;
    }

    .slide img {
        border-radius: var(--radius-sm);
    }
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.9));
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
}

.banner-slider:hover .slider-arrow {
    opacity: 1;
    visibility: visible;
}

.slider-arrow:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 25px rgba(197, 128, 0, 0.4);
}

.slider-arrow:active {
    transform: translateY(-50%) scale(0.95);
}

.slider-arrow.prev {
    left: var(--spacing-lg);
}

.slider-arrow.next {
    right: var(--spacing-lg);
}

.slider-arrow svg {
    width: 28px;
    height: 28px;
    transition: transform var(--transition-normal);
}

.slider-arrow:hover svg {
    transform: scale(1.1);
}

.slider-navigation {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
}

.slider-dots {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs);
    background: transparent;
    border-radius: var(--radius-xl);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    opacity: 0.6;
}

.dot:hover {
    background: rgba(255, 255, 255, 0.5);
    opacity: 0.8;
    transform: scale(1.2);
}

.dot.active,
.dot[aria-selected="true"] {
    background: rgba(255, 255, 255, 0.8);
    opacity: 1;
    transform: scale(1.3);
}

/* ===== ANNOUNCEMENT ===== */
.announcement-section {
    margin: var(--spacing-xl) auto;
    max-width: 1200px;
    padding: 0 var(--spacing-lg);
}

.announcement-container {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.announcement-icon {
    margin-right: var(--spacing-md);
    color: var(--accent-color);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 32px;
}

.announcement-content-wrapper {
    flex: 1;
    overflow: hidden;
    position: relative;
    height: 32px;
    display: flex;
    align-items: center;
}

.announcement-content {
    position: absolute;
    white-space: nowrap;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    line-height: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    animation: marquee 25s linear infinite;
    will-change: transform;
}

@keyframes marquee {
    0% {
        transform: translateX(100%);
    }

    100% {
        transform: translateX(-100%);
    }
}

.inline-register-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
    margin-left: var(--spacing-sm);
    transition: all var(--transition-normal);
    vertical-align: middle;
    display: inline-flex;
    align-items: center;
}

.inline-register-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* ===== GAME CATEGORIES ===== */
.game-categories {
    margin: var(--spacing-xl) 0 var(--spacing-lg) 0;
}

.categories-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.category-item {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    display: block;
}

.category-content {
    display: contents;
}

.category-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.category-icon {
    margin-bottom: var(--spacing-md);
}

.category-icon img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    transition: transform var(--transition-normal);
}

.category-item:hover .category-icon img {
    transform: scale(1.1);
}

.category-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.category-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ===== MAIN CONTENT ===== */
.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container {
    width: 100%;
}

.section-title {
    text-align: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    border-radius: var(--radius-sm);
}

.title-icon {
    margin-right: var(--spacing-sm);
    font-size: 1em;
}

/* ===== MODULES ===== */
.registration-section {
    margin-bottom: var(--spacing-xl);
}

.module {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xxl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

.module-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: var(--spacing-md);
}

/* ===== REGISTRATION CARDS ===== */
.registration-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.registration-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.registration-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.registration-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
}

.member-card::before {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.agent-card::before {
    background: linear-gradient(90deg, #9c27b0, #e91e63);
}

.card-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.card-benefits {
    margin: var(--spacing-lg) 0;
}

.card-benefits .benefit-item {
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.card-benefits .benefit-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.1);
}

.card-benefits .benefit-icon {
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.card-benefits .benefit-text {
    flex: 1;
}

.card-benefits .benefit-text strong {
    display: inline;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-right: var(--spacing-xs);
}

.card-benefits .benefit-text small {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    display: inline;
}



.telegram-btn {
    background: #0088cc;
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-left: var(--spacing-xs);
}

.telegram-btn:hover {
    background: #006699;
    transform: scale(1.05);
}

.card-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.card-actions .btn {
    flex: 1;
    min-width: auto;
    padding: var(--spacing-md) var(--spacing-lg);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

/* ===== BENEFITS ===== */
.benefits-section {
    margin: var(--spacing-xl) 0;
}

.benefits-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    text-align: center;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.benefit-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.benefit-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.benefit-icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.benefit-content {
    flex: 1;
}

.benefit-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.benefit-detail {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

/* ===== BUTTONS ===== */
.action-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-width: 140px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-test {
    background: var(--success-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    min-width: 70px;
}

.btn-access {
    background: var(--secondary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    min-width: 70px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ===== SPEED TEST ===== */
.speed-test-section {
    margin-bottom: var(--spacing-xxl);
}

.speed-test-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.speed-test-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.speed-test-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
}

.domain-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    flex: 1;
}

.domain-name {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.speed-result {
    font-size: var(--font-size-xs);
    color: var(--success-color);
    font-weight: 600;
    transition: color var(--transition-normal);
}

.speed-result.testing {
    color: var(--warning-color);
}

.speed-result.excellent {
    color: var(--success-color);
}

.speed-result.good {
    color: #8BC34A;
}

.speed-result.fair {
    color: var(--warning-color);
}

.speed-result.poor,
.speed-result.timeout {
    color: var(--error-color);
}

.speed-test-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.speed-test-note {
    margin-top: var(--spacing-lg);
    text-align: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ===== FEATURES ===== */
.features-section {
    margin-bottom: var(--spacing-xxl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-item {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: block;
}

.feature-content {
    display: contents;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* ===== FOOTER ===== */
.footer {
    background: linear-gradient(to bottom, var(--bg-secondary), rgba(0, 0, 0, 0.95));
    margin-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
}

/* Footer content section removed as requested */

.footer-certifications {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cert-item img {
    height: 40px;
    width: auto;
    opacity: 0.7;
    transition: opacity var(--transition-normal);
}

.cert-item:hover img {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
}

.footer-copyright {
    text-align: center;
    padding: var(--spacing-md) var(--spacing-lg);
}

.footer-copyright p {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
    font-weight: normal;
}

.age-warning {
    color: var(--warning-color) !important;
    font-weight: normal;
}

.copyright {
    font-weight: normal;
    color: var(--text-secondary) !important;
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: calc(var(--spacing-xl) + 120px);
    /* 向上移动两个按钮直径的距离 */
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ===== RESPONSIVE DESIGN ===== */

/* 平板端样式 */
@media (max-width: 1024px) and (min-width: 769px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Footer content removed */

    .back-to-top {
        bottom: calc(var(--spacing-xl) + 100px);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-xxl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-4xl: 2rem;
    }

    .header-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .main-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg-secondary);
        backdrop-filter: blur(20px);
        z-index: var(--z-modal);
        transition: left var(--transition-normal);
        padding-top: 80px;
    }

    .main-nav.mobile-open {
        left: 0;
    }

    .mobile-menu-close {
        display: none !important;
        position: absolute;
        top: var(--spacing-lg);
        right: var(--spacing-lg);
        width: 40px;
        height: 40px;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: var(--radius-full);
        color: white;
        cursor: pointer;
        align-items: center;
        justify-content: center;
        transition: all var(--transition-normal);
        z-index: var(--z-tooltip);
    }

    .main-nav.mobile-open .mobile-menu-close {
        display: flex !important;
    }

    .mobile-menu-close:hover {
        background: rgba(255, 255, 255, 0.2);
        border-color: rgba(255, 255, 255, 0.4);
        transform: scale(1.1);
    }

    .main-nav .nav-list {
        flex-direction: column;
        gap: var(--spacing-xl);
        padding: var(--spacing-xl);
        height: 100%;
        justify-content: center;
        margin-top: 60px;
    }

    .nav-btn {
        width: 100%;
        padding: var(--spacing-lg);
        font-size: var(--font-size-lg);
        justify-content: center;
    }

    .mobile-menu-toggle {
        display: flex;
        z-index: var(--z-modal-backdrop);
    }

    .mobile-menu-toggle.active .hamburger:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

    .mobile-menu-toggle.active .hamburger:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active .hamburger:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    .slider-arrow {
        display: none !important;
    }

    .slider-dots {
        padding: var(--spacing-xs);
        gap: var(--spacing-xs);
    }

    .dot {
        width: 6px;
        height: 6px;
    }

    .categories-container {
        padding: 0 var(--spacing-lg);
    }

    .categories-grid {
        grid-template-columns: 1fr !important;
        gap: var(--spacing-sm);
    }

    .category-item {
        padding: var(--spacing-md);
        display: flex;
        align-items: center;
        text-align: left;
        gap: var(--spacing-md);
    }

    .category-icon {
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .category-icon img {
        width: 50px;
        height: 50px;
    }

    .category-content {
        flex: 1;
    }

    .category-title {
        margin-bottom: var(--spacing-xs);
        font-size: var(--font-size-base);
    }

    .category-desc {
        font-size: var(--font-size-xs);
    }

    .module {
        padding: var(--spacing-xl);
    }

    .benefits-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .registration-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .registration-card {
        padding: var(--spacing-lg);
    }
    
    .card-icon {
        display: none;
    }

    .card-benefits {
        margin: var(--spacing-md) 0;
    }

    .card-benefits .benefit-item {
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-xs);
        gap: var(--spacing-sm);
        display: flex;
        align-items: center;
        text-align: left;
    }

    .card-benefits .benefit-icon {
        font-size: var(--font-size-2xl);
        flex-shrink: 0;
    }

    .card-benefits .benefit-text {
        flex: 1;
    }

    .card-benefits .benefit-text strong {
        font-size: var(--font-size-sm);
        margin-right: var(--spacing-xs);
        display: inline;
        color: var(--text-primary);
        font-weight: 600;
    }

    .card-benefits .benefit-text small {
        font-size: var(--font-size-xs);
        line-height: 1.3;
        color: var(--text-secondary);
        display: inline;
    }

    .card-actions {
        flex-direction: row;
        gap: var(--spacing-sm);
    }

    .card-actions .btn {
        flex: 1;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
        min-height: 48px;
    }

    .action-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .speed-test-grid {
        display: block;
    }

    .speed-test-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-xs);
        border-radius: var(--radius-sm);
    }

    .domain-info {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-xs);
        flex: 1;
        margin-right: var(--spacing-sm);
    }

    .domain-name {
        font-size: var(--font-size-sm);
        font-weight: 500;
    }

    .speed-result {
        font-size: var(--font-size-xs);
        text-align: left;
    }

    .speed-test-buttons {
        display: flex;
        gap: var(--spacing-xs);
        flex-shrink: 0;
    }

    .btn-test,
    .btn-access {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
        min-width: 45px;
        border-radius: var(--radius-sm);
        white-space: nowrap;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .feature-item {
        padding: var(--spacing-md);
        display: flex;
        align-items: center;
        text-align: left;
        gap: var(--spacing-md);
    }

    .feature-icon {
        margin-bottom: 0;
        flex-shrink: 0;
        font-size: var(--font-size-2xl);
    }

    .feature-content {
        flex: 1;
    }

    .feature-title {
        margin-bottom: var(--spacing-xs);
        font-size: var(--font-size-base);
    }

    .feature-desc {
        font-size: var(--font-size-xs);
    }

    /* Footer content removed */

    .footer-certifications {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .back-to-top {
        bottom: calc(var(--spacing-lg) + 100px);
        right: var(--spacing-lg);
        width: 45px;
        height: 45px;
    }

    /* 手机端隐藏footer */
    .footer {
        display: none;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: var(--spacing-sm);
    }

    .logo img {
        height: 40px;
    }

    .announcement-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .module {
        padding: var(--spacing-lg);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .categories-grid {
        grid-template-columns: 1fr !important;
    }

    .category-item {
        padding: var(--spacing-md);
    }

    .benefit-item {
        padding: var(--spacing-md);
    }

    .registration-card {
        padding: var(--spacing-md);
    }

    .card-benefits .benefit-item {
        padding: var(--spacing-xs);
        gap: var(--spacing-xs);
    }

    .card-benefits .benefit-icon {
        font-size: var(--font-size-xl);
    }

    .card-benefits .benefit-text strong {
        font-size: var(--font-size-xs);
        margin-right: 4px;
    }

    .card-benefits .benefit-text small {
        font-size: 10px;
    }

    .card-actions {
        gap: var(--spacing-xs);
    }

    .card-actions .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
        min-height: 40px;
    }

    .card-icon {
        display: none;
    }

    .card-subtitle {
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }

    .feature-item {
        padding: var(--spacing-sm);
    }

    .feature-icon {
        font-size: var(--font-size-xl);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }

    /* 超小屏幕轮播图优化 */
    .slider-arrow {
        width: 45px;
        height: 45px;
    }

    .slider-arrow svg {
        width: 20px;
        height: 20px;
    }

    .slider-dots {
        padding: var(--spacing-xs);
        gap: var(--spacing-xs);
    }

    .dot {
        width: 5px;
        height: 5px;
    }

    /* 游戏分类在超小屏幕保持2列 */
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .category-icon img {
        width: 50px;
        height: 50px;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* Animation classes */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* ===== PRINT STYLES ===== */
@media print {

    .header,
    .announcement-section,
    .back-to-top,
    .slider-arrow,
    .slider-navigation {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    .module {
        background: white !important;
        border: 1px solid #ccc !important;
        box-shadow: none !important;
    }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    :root {
        --bg-card: rgba(0, 0, 0, 0.9);
        --text-secondary: rgba(255, 255, 255, 0.9);
        --text-muted: rgba(255, 255, 255, 0.8);
    }

    .btn {
        border: 2px solid currentColor;
    }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    /* 移动端公告样式调整 */
    .announcement-content-wrapper {
        height: 28px;
    }

    .announcement-content {
        font-size: var(--font-size-sm);
        animation: marquee 20s linear infinite;
    }
}