/* CSS重置与基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 深色主题变量 */
    --color-bg: #0a0a0f;
    --color-surface: #12121a;
    --color-surface-light: #1a1a24;
    --color-text: #e0e0e8;
    --color-text-secondary: #a0a0b0;
    --color-primary: #00d9ff;
    --color-primary-dark: #00a8cc;
    --color-secondary: #ff0080;
    --color-accent: #00ffaa;
    --color-border: #2a2a3a;
    --color-success: #00ff88;
    --color-warning: #ffcc00;
    --color-danger: #ff3366;
    
    /* 字体 */
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 32px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.3);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

.light-theme {
    /* 浅色主题变量 */
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-surface-light: #f0f2f5;
    --color-text: #1a1a2e;
    --color-text-secondary: #4a4a6a;
    --color-primary: #0066ff;
    --color-primary-dark: #0052cc;
    --color-secondary: #ff3366;
    --color-accent: #00cc88;
    --color-border: #d0d5dd;
    --color-success: #00aa66;
    --color-warning: #ff9900;
    --color-danger: #ff3333;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
    --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.2);
}

.light-theme .navbar {
    background-color: rgba(255, 255, 255, 0.9);
    border-bottom-color: var(--color-border);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

section {
    padding: var(--spacing-xl) 0;
}

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

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

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    gap: 0.5rem;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

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

.highlight {
    color: var(--color-primary);
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--color-secondary);
    opacity: 0.5;
    z-index: -1;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-normal);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-text);
}

.logo-image {
    width: 48px;
    height: 48px;
    object-fit: contain;
    image-rendering: pixelated;
    filter: drop-shadow(0 0 10px rgba(0, 217, 255, 0.35));
    flex-shrink: 0;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-text);
    line-height: 1;
}

.logo-icon {
    color: var(--color-primary);
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--color-text);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
}

.nav-links a:hover {
    color: var(--color-primary);
    background-color: rgba(0, 217, 255, 0.1);
}

.theme-toggle, .menu-toggle {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover, .menu-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-primary);
}

.menu-toggle {
    display: none;
}

/* 英雄区域样式 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1) 0%, rgba(255, 0, 128, 0.05) 100%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-primary);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 1rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-secondary);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* 视频区域样式 */
.videos-section {
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    margin: var(--spacing-xl) auto;
    position: relative;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.video-card {
    background-color: var(--color-surface-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    background: #0b1020;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.7);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.video-card:hover .play-icon {
    opacity: 1;
}

.video-info {
    padding: var(--spacing-md);
}

.video-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.video-description {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
}

.section-footer {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* 关于区域样式 */
.about-section {
    background-color: var(--color-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.tag {
    background-color: var(--color-surface-light);
    color: var(--color-text);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-frame {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: 8px;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--color-text-secondary);
    gap: 1rem;
}

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

.image-placeholder span {
    margin-top: var(--spacing-sm);
    font-size: 1rem;
}

/* 联系区域样式 */
.contact-section {
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background-color: var(--color-surface-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-details h3 {
    margin-bottom: 0.5rem;
}

.qr-placeholder {
    margin-top: 0.5rem;
}

.qr-code {
    width: 120px;
    height: 120px;
    background-color: var(--color-surface-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-text-secondary);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-surface-light);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.2);
}

/* 页脚样式 */
.footer {
    background-color: var(--color-surface-light);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

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

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

.footer-links h3,
.footer-social h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

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

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

.footer-links a {
    color: var(--color-text-secondary);
}

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

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.social-icon:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-4px);
}

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

.footer-bottom .fa-heart {
    color: var(--color-danger);
}

/* 视频标签样式 */
.video-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-top: var(--spacing-xs);
}

.video-tag {
    background-color: rgba(0, 217, 255, 0.1);
    color: var(--color-primary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.light-theme .video-tag {
    background-color: rgba(0, 102, 255, 0.1);
    color: var(--color-primary);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-surface);
        flex-direction: column;
        padding: var(--spacing-md);
        border-top: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .section-footer {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}