:root {
    --color-primary: #4a90e2;
    --color-primary-dark: #357abd;
    --color-secondary: #7b68ee;
    --color-accent: #ff6b6b;
    
    --color-bg: #fafbfc;
    --color-bg-card: #ffffff;
    --color-bg-hover: #f5f7f9;
    
    --color-text: #2c3e50;
    --color-text-light: #5a6c7d;
    --color-text-lighter: #8795a1;
    
    --color-border: #e1e4e8;
    --color-border-light: #f0f2f5;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo a {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
    padding: 8px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-primary);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-normal);
}

.hero {
    padding: 80px 0 60px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-content {
    max-width: 720px;
}

.hero-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(18px, 3vw, 24px);
    color: var(--color-text-light);
    margin-bottom: 24px;
    font-weight: 500;
}

.hero-description {
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-lighter);
    font-weight: 500;
}

.works-section,
.blog-section,
.about-section {
    padding: 60px 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.view-all {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.view-all:hover {
    transform: translateX(4px);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.work-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid var(--color-border-light);
}

.work-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.work-card.coming-soon {
    opacity: 0.7;
    cursor: default;
}

.work-card.coming-soon:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
    border-color: var(--color-border-light);
}

.card-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.card-placeholder.game {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.card-placeholder.app {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.placeholder-icon {
    font-size: 64px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.card-content {
    padding: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

.card-description {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.card-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(74, 144, 226, 0.1);
    border-radius: 12px;
}

.blog-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.blog-card {
    background: var(--color-bg-card);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-normal);
}

.blog-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.blog-date {
    font-size: 13px;
    color: var(--color-text-lighter);
}

.blog-category {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-secondary);
    background: rgba(123, 104, 238, 0.1);
    padding: 4px 10px;
    border-radius: 10px;
}

.blog-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.blog-title a {
    color: var(--color-text);
}

.blog-title a:hover {
    color: var(--color-primary);
}

.blog-excerpt {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

.about-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.about-content {
    max-width: 720px;
}

.about-text {
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-links {
    display: flex;
    gap: 16px;
    margin-top: 32px;
}

.about-link {
    display: inline-flex;
    align-items: center;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    color: #fff;
    background: var(--color-text);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

.about-link:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

.footer {
    background: var(--color-text);
    color: #fff;
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: #fff;
}

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

.footer-info p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 8px;
}

.footer-info a {
    color: rgba(255, 255, 255, 0.6);
}

.footer-info a:hover {
    color: #fff;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border-light);
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 60px 0 40px;
    }
    
    .hero-stats {
        gap: 32px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .works-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

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

.hero-content,
.work-card,
.blog-card {
    animation: fadeIn 0.6s ease-out;
}

.work-card:nth-child(2) {
    animation-delay: 0.1s;
}

.work-card:nth-child(3) {
    animation-delay: 0.2s;
}

.blog-card:nth-child(2) {
    animation-delay: 0.1s;
}

.blog-card:nth-child(3) {
    animation-delay: 0.2s;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}