:root {
    --bg-primary: #0a1929;
    --bg-secondary: #132f4c;
    --bg-card: rgba(19, 47, 76, 0.85);
    --text-primary: #e6f1ff;
    --text-secondary: #8892b0;
    --accent: #64ffda;
    --accent-hover: #4ecdc4;
    --border-color: rgba(100, 255, 218, 0.2);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --blur: 12px;
    --transition: all 0.3s ease;
}

[data-theme="light"] {
    --bg-primary: #e8f4f8;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --text-primary: #1a365d;
    --text-secondary: #4a5568;
    --accent: #0077b6;
    --accent-hover: #00b4d8;
    --border-color: rgba(0, 119, 182, 0.2);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

img[src$=".svg"]:not(.download-btn .btn-icon img):not(.taptap-logo):not(.btn-icon) {
    filter: brightness(0) saturate(100%) invert(58%) sepia(96%) saturate(427%) hue-rotate(130deg) brightness(94%) contrast(101%);
}

[data-theme="light"] img[src$=".svg"]:not(.download-btn .btn-icon img):not(.taptap-logo):not(.btn-icon) {
    filter: brightness(0) saturate(100%) invert(28%) sepia(98%) saturate(1416%) hue-rotate(184deg) brightness(94%) contrast(101%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle button {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-primary);
}

.theme-toggle button:hover {
    transform: scale(1.1);
    background: var(--accent);
    color: var(--bg-primary);
}

.theme-toggle button svg {
    width: 24px;
    height: 24px;
}

.icon-sun, .icon-moon {
    width: 24px;
    height: 24px;
    transition: opacity 0.3s ease;
}

[data-theme="light"] .icon-moon {
    display: none;
}

[data-theme="light"] .icon-sun {
    display: block;
    opacity: 1;
}

[data-theme="dark"] .icon-moon {
    display: block;
}

[data-theme="dark"] .icon-sun {
    display: none;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(135deg, rgba(10, 25, 41, 0.9) 0%, rgba(19, 47, 76, 0.85) 50%, rgba(10, 25, 41, 0.9) 100%),
        url('image/游戏库背景壁纸.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(100, 255, 218, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(100, 255, 218, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 119, 182, 0.1) 0%, transparent 30%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-20px, -20px); }
}

[data-theme="light"] .hero-bg {
    background: 
        linear-gradient(135deg, rgba(232, 244, 248, 0.7) 0%, rgba(255, 255, 255, 0.6) 50%, rgba(232, 244, 248, 0.7) 100%),
        url('image/游戏库背景壁纸.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

[data-theme="light"] .hero-bg::before {
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 119, 182, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 119, 182, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 180, 216, 0.1) 0%, transparent 30%);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 2rem;
}

.game-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent), #00b4d8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
    from { filter: drop-shadow(0 0 10px rgba(100, 255, 218, 0.3)); }
    to { filter: drop-shadow(0 0 20px rgba(100, 255, 218, 0.6)); }
}

.game-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.download-podium {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.podium-row {
    display: flex;
    gap: 3rem;
    justify-content: center;
}

.podium-top {
    order: -1;
}

.podium-top .download-btn {
    transform: scale(1.25);
}

.podium-top .btn-icon {
    width: 72px;
    height: 72px;
}

.podium-bottom {
    margin-top: 1rem;
}

.podium-bottom .btn-icon {
    width: 56px;
    height: 56px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    text-decoration: none;
    transition: border-color 0.2s ease;
    min-width: 180px;
    border-radius: 8px;
    border: 1px solid transparent;
}

.download-btn:hover {
    border-color: rgba(128, 128, 128, 0.3);
}

.download-btn .btn-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.download-btn .btn-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.download-btn .btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.download-btn .btn-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #ffffff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .download-btn .btn-title {
    color: #ffffff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.taptap-btn .btn-icon {
}

.qq-btn .btn-icon {
}

.baidu-btn .btn-icon {
}

.taptap-logo {
    height: 60px;
    width: auto;
}

.nav-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.nav-menu {
    display: flex;
    justify-content: center;
    gap: 1rem;
    list-style: none;
    flex-wrap: wrap;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    background: rgba(100, 255, 218, 0.05);
    border: 1px solid transparent;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--accent);
    background: rgba(100, 255, 218, 0.1);
    border-color: var(--border-color);
}

.nav-link svg,
.nav-link .nav-icon {
    width: 20px;
    height: 20px;
    color: var(--accent);
}

.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 1rem;
}

.section {
    margin-bottom: 4rem;
}

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

.section-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.section-title svg,
.section-title .section-icon {
    width: 32px;
    height: 32px;
    color: var(--accent);
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.card h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.warning-box {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    border-radius: 8px;
    padding: 1rem;
    color: #ffc107;
}

.warning-box svg,
.warning-box .warning-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--accent);
}

.info-box {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background: rgba(100, 255, 218, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    color: var(--accent);
}

.info-box svg,
.info-box .info-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--accent);
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.feature-list svg,
.feature-list .feature-icon {
    width: 20px;
    height: 20px;
    color: var(--accent);
}

kbd {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-family: monospace;
    color: var(--accent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: rgba(100, 255, 218, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg,
.feature-icon img {
    width: 30px;
    height: 30px;
    color: var(--accent);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 0;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    transform: translateX(-5px);
}

.timeline-content {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateX(5px);
    border-color: var(--accent);
}

.timeline-date {
    display: inline-block;
    background: rgba(100, 255, 218, 0.1);
    color: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.requirements-card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
}

.requirements-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.requirements-card h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
    text-align: center;
}

.requirements-list {
    list-style: none;
}

.requirements-list li {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.requirements-list li:last-child {
    border-bottom: none;
}

.req-label {
    color: var(--text-secondary);
}

.req-value {
    color: var(--text-primary);
    font-weight: 500;
}

.footer {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border-top: 1px solid var(--border-color);
    padding: 3rem 1rem 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-info {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
}

.footer-brand h3 {
    color: var(--accent);
    margin-bottom: 0.25rem;
    font-size: 1.5rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin: 0;
}

.footer-details {
    display: grid;
    grid-template-columns: repeat(2, auto);
    gap: 0.5rem 2rem;
}

.footer-details p {
    margin: 0;
    display: flex;
    gap: 0.5rem;
}

.footer-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.footer-value {
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    align-items: center;
}

.footer-links .taptap-logo {
    height: 50px;
    width: auto;
    transition: var(--transition);
}

.footer-links .taptap-logo:hover {
    transform: scale(1.05);
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-link {
        width: 100%;
        justify-content: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero {
        min-height: 70vh;
    }
    
    .hero-bg {
        background-size: contain;
        background-position: center center;
    }
}

@media (max-width: 480px) {
    .features-grid,
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .download-podium {
        width: 100%;
    }
    
    .podium-row {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }
    
    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .podium-top .download-btn {
        transform: scale(1);
    }
    
    .podium-top .btn-icon,
    .podium-bottom .btn-icon {
        width: 40px;
        height: 40px;
    }
    
    .hero-bg {
        background-size: contain;
    }
}