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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: color 0.3s ease, background-color 0.3s ease;
}

/* ===== CSS Variables ===== */
:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f4;
    --text-primary: #1d1d1f;
    --text-secondary: #515154;
    --text-tertiary: #86868b;
    --accent-primary: #007aff;
    --accent-secondary: #5856d6;
    --border-light: #d2d2d7;
    --border-medium: #a1a1a6;
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-heavy: rgba(0, 0, 0, 0.2);
    
    /* Spacing */
    --section-padding: 120px 0;
    --container-padding: 0 24px;
    --container-max-width: 1200px;
    
    /* Typography */
    --font-size-xl: 3.5rem;
    --font-size-lg: 2.25rem;
    --font-size-md: 1.5rem;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-xs: 0.75rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme Colors */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #1c1c1e;
        --bg-tertiary: #2c2c2e;
        --text-primary: #f2f2f7;
        --text-secondary: #ebebf5;
        --text-tertiary: #8e8e93;
        --accent-primary: #0a84ff;
        --accent-secondary: #5e5ce6;
        --border-light: #38383a;
        --border-medium: #48484a;
        --shadow-light: rgba(255, 255, 255, 0.05);
        --shadow-medium: rgba(255, 255, 255, 0.1);
        --shadow-heavy: rgba(255, 255, 255, 0.2);
    }
}

/* Force dark theme class */
.dark-theme {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --text-primary: #f2f2f7;
    --text-secondary: #ebebf5;
    --text-tertiary: #8e8e93;
    --accent-primary: #0a84ff;
    --accent-secondary: #5e5ce6;
    --border-light: #38383a;
    --border-medium: #48484a;
    --shadow-light: rgba(255, 255, 255, 0.05);
    --shadow-medium: rgba(255, 255, 255, 0.1);
    --shadow-heavy: rgba(255, 255, 255, 0.2);
}

/* ===== Utility Classes ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--container-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: rgba(248, 249, 250, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 9999;
    transition: all var(--transition-medium);
}

.dark-theme .nav {
    background: rgba(28, 28, 30, 0.9);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
    border-radius: 1px;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
}

/* 风格切换按钮 */
.style-toggle {
    background: none;
    border: 1px solid var(--border-light);
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    padding: 8px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    position: relative;
    background: var(--bg-secondary);
}

.style-toggle:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-light);
}

.style-toggle:active {
    transform: translateY(0);
    box-shadow: none;
}

.style-toggle.active {
    background: linear-gradient(135deg, #007aff 0%, #5856d6 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.style-toggle.active:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    overflow: hidden;
}

/* Hero Background Videos */
.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    pointer-events: none;
    transition: opacity 1s ease-in-out;
}

/* Video Overlay */
.hero-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.1) 50%,
        rgba(0, 0, 0, 0.2) 100%
    );
    z-index: 3;
    pointer-events: none;
}

/* Dark theme video overlay adjustment */
.dark-theme .hero-video-overlay {
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.5) 0%,
        rgba(0, 0, 0, 0.2) 50%,
        rgba(0, 0, 0, 0.4) 100%
    );
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* Enhanced text readability over video */
.hero-title .hero-name,
.hero-title .hero-name-en {
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    text-shadow: 0 2px 15px rgba(0, 0, 0, 0.4);
}

.hero-description {
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: var(--radius-md);
    margin-bottom: 48px;
}

/* Dark theme text adjustments */
.dark-theme .hero-description {
    background: rgba(0, 0, 0, 0.2);
}

.hero-title {
    margin-bottom: 24px;
}

.hero-name {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.hero-name-en {
    display: block;
    font-size: var(--font-size-md);
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.hero-subtitle {
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: 32px;
}

.hero-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
    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);
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 2px solid transparent;
    min-width: 140px;
}

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

.btn-primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(0, 122, 255, 0.3);
}

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

.btn-outline:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px var(--shadow-medium);
}

/* ===== Works Section ===== */
.works {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 32px;
}

/* 隐藏的作品项目 - 平滑过渡 */
.work-item.hidden {
    display: none;
}

/* 作品项目淡入动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 准备播放动画的项目 - 初始隐藏状态 */
.work-item.fade-in-ready {
    opacity: 0;
    transform: translateY(30px);
}

.work-item.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

.work-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 20px var(--shadow-light);
    transition: all var(--transition-medium);
    opacity: 1;
    transform: translateY(0);
}

.work-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 40px var(--shadow-medium);
}

.work-item.hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

.work-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.work-image {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.work-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.work-item:hover .work-image img {
    transform: scale(1.05);
}

.work-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.work-item:hover .work-overlay {
    opacity: 1;
}

.work-view {
    color: white;
    font-weight: 500;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.work-content {
    padding: 24px;
}

.work-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.work-description {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

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

.tag {
    font-size: var(--font-size-xs);
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    padding: 4px 12px;
    border-radius: var(--radius-xl);
    font-weight: 500;
}

/* ===== About Section ===== */
.about {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-intro {
    text-align: center;
    margin-bottom: 80px;
}

.about-intro h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.about-intro p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
}

.skill-category h4 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    position: relative;
    padding-left: 20px;
}

.skill-category li::before {
    content: '•';
    color: var(--accent-primary);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.work-philosophy h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.philosophy-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-medium);
}

.philosophy-item:hover {
    transform: translateY(-4px);
}

.philosophy-item h4 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--accent-primary);
}

.philosophy-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Blog Section ===== */
.blog {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.blog-item {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 20px var(--shadow-light);
    transition: all var(--transition-medium);
}

.blog-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 40px var(--shadow-medium);
}

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

.blog-meta time {
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
}

.blog-category {
    background: var(--accent-primary);
    color: white;
    padding: 4px 12px;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.blog-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.blog-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.blog-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.blog-link:hover {
    color: var(--accent-secondary);
}

/* ===== Contact Section ===== */
.contact {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 60px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.contact-icon {
    font-size: 2rem;
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

.contact-details a:hover {
    color: var(--accent-secondary);
}

.contact-details p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.qr-code {
    width: 120px;
    height: 120px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.qr-code img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.social-links h4 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    transition: all var(--transition-medium);
}

.social-link:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    color: var(--accent-primary);
}

.social-icon {
    font-size: 1.5rem;
}

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

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    padding: 40px 0;
    border-top: 1px solid var(--border-light);
}

.footer-content {
    text-align: center;
    color: var(--text-tertiary);
}

.footer-content p {
    margin-bottom: 8px;
}

/* ===== Lightbox ===== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 40px;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.lightbox-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    z-index: 2001;
    transition: background var(--transition-fast);
}

.lightbox-close:hover {
    background: rgba(0, 0, 0, 0.7);
}

.lightbox-media img,
.lightbox-media video {
    max-width: 100%;
    max-height: 80vh;
    display: block;
}

.lightbox-caption {
    padding: 20px;
    color: var(--text-secondary);
    text-align: center;
}

/* ===== Responsive Design ===== */

/* 平板端优化 */
@media (max-width: 1024px) {
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .philosophy-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 平板端也使用移动端菜单 */
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(248, 249, 250, 0.98);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        flex-direction: column;
        padding: 20px 24px;
        transform: translateY(-100%);
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        z-index: 9998;
        gap: 0;
        max-height: calc(100vh - 72px);
        overflow: hidden;
        visibility: hidden;
        opacity: 0;
        transition: transform var(--transition-medium), opacity var(--transition-medium), visibility 0s var(--transition-medium);
    }
    
    .dark-theme .nav-menu {
        background: rgba(28, 28, 30, 0.95);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        visibility: visible;
        opacity: 1;
        overflow-y: auto;
        transition: transform var(--transition-medium), opacity var(--transition-medium), visibility 0s 0s;
    }
    
    .nav-toggle {
        display: flex;
    }
}

/* 手机端优化 */
@media (max-width: 768px) {
    :root {
        --font-size-xl: 2.5rem;
        --font-size-lg: 1.75rem;
        --font-size-md: 1.25rem;
        --section-padding: 60px 0;
        --container-padding: 0 16px;
    }
    
    /* 容器优化 */
    .container {
        max-width: 100%;
        padding: 0 16px;
    }
    
    /* Mobile video background adjustments */
    .hero-video {
        object-position: center center;
        min-width: 100%;
        min-height: 100%;
    }
    
    /* Enhanced overlay for mobile readability */
    .hero-video-overlay {
        background: linear-gradient(
            135deg,
            rgba(0, 0, 0, 0.4) 0%,
            rgba(0, 0, 0, 0.2) 50%,
            rgba(0, 0, 0, 0.35) 100%
        );
    }
    
    .dark-theme .hero-video-overlay {
        background: linear-gradient(
            135deg,
            rgba(0, 0, 0, 0.6) 0%,
            rgba(0, 0, 0, 0.3) 50%,
            rgba(0, 0, 0, 0.5) 100%
        );
    }
    
    .hero-description {
        background: rgba(255, 255, 255, 0.15);
        backdrop-filter: blur(15px);
        padding: 16px;
    }
    
    .dark-theme .hero-description {
        background: rgba(0, 0, 0, 0.25);
    }
    
    /* 移动端导航优化 */
    .nav {
        padding: 0;
        height: 64px;
    }
    
    .nav-container {
        padding: 0 16px;
        height: 64px;
    }
    
    .nav-logo {
        font-size: 1.125rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: calc(100vw - 120px);
    }
    
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(248, 249, 250, 0.98);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        flex-direction: column;
        padding: 20px 24px;
        transform: translateY(-100%);
        transition: transform var(--transition-medium);
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        z-index: 9998;
        gap: 0;
        max-height: calc(100vh - 64px);
        max-height: calc(100dvh - 64px);
        overflow: hidden;
        -webkit-overflow-scrolling: touch;
        visibility: hidden;
        opacity: 0;
        transition: transform var(--transition-medium), opacity var(--transition-medium), visibility 0s var(--transition-medium);
    }
    
    .nav-menu li {
        margin: 8px 0;
    }
    
    .nav-link {
        padding: 12px 16px;
        border-radius: 8px;
        transition: all var(--transition-fast);
        display: block;
        text-align: center;
    }
    
    .nav-link:hover {
        background: var(--bg-tertiary);
    }
    
    .dark-theme .nav-menu {
        background: rgba(28, 28, 30, 0.95);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        visibility: visible;
        opacity: 1;
        overflow-y: auto;
        transition: transform var(--transition-medium), opacity var(--transition-medium), visibility 0s 0s;
    }
    
    .nav-toggle {
        display: flex;
        padding: 12px;
        margin: -12px -12px -12px 0;
        z-index: 10000;
        position: relative;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* 防止菜单打开时背景滚动 */
    body.menu-open {
        overflow: hidden;
        position: fixed;
        width: 100%;
        top: 0;
        left: 0;
        right: 0;
    }
    
    /* 移动端英雄区域优化 */
    .hero {
        min-height: 100vh;
        padding: 64px 0 40px;
    }
    
    .hero-content {
        text-align: center;
        padding: 40px 20px;
        margin-top: 0;
    }
    
    .hero-name {
        font-size: 2.8rem;
        margin-bottom: 8px;
        line-height: 1.1;
    }
    
    .hero-name-en {
        font-size: 1rem;
        opacity: 0.8;
        margin-bottom: 16px;
    }
    
    .hero-title {
        font-size: 1.4rem;
        margin-bottom: 12px;
    }
    
    .hero-description {
        font-size: 0.95rem;
        line-height: 1.6;
        margin-bottom: 32px;
        padding: 20px;
        border-radius: 12px;
        max-width: 90%;
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    
    .btn {
        width: 240px;
        padding: 14px 24px;
        font-size: 1rem;
    }
    
    /* 移动端作品区域优化 */
    .works {
        padding: 60px 0;
    }
    
    .filter-tabs {
        gap: 8px;
        margin-bottom: 40px;
        justify-content: center;
        flex-wrap: wrap;
        padding: 0 16px;
    }
    
    .filter-tab {
        padding: 10px 18px;
        font-size: 0.9rem;
        border-radius: 20px;
        white-space: nowrap;
    }
    
    .works-grid {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 0 16px;
    }
    
    .work-item {
        border-radius: 16px;
        overflow: hidden;
    }
    
    .work-content {
        padding: 20px;
    }
    
    .work-title {
        font-size: 1.25rem;
        margin-bottom: 8px;
    }
    
    .work-description {
        font-size: 0.9rem;
        line-height: 1.5;
        margin-bottom: 16px;
    }
    
    /* 移动端技能区域优化 */
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .skill-item {
        padding: 24px 20px;
        text-align: center;
    }
    
    /* 移动端理念区域优化 */
    .philosophy-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    /* 移动端博客区域优化 */
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    /* 移动端联系区域优化 */
    .contact-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .contact-info h3 {
        font-size: 1.4rem;
        margin-bottom: 16px;
    }
    
    .social-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .social-item {
        padding: 16px;
        font-size: 0.9rem;
    }
    
    /* 移动端灯箱优化 */
    .lightbox {
        padding: 16px;
    }
    
    .lightbox-content {
        max-width: 95%;
        max-height: 85%;
        border-radius: 12px;
    }
    
    .lightbox-image,
    .lightbox-video {
        border-radius: 12px;
    }
    
    .lightbox-close {
        top: 16px;
        right: 16px;
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
    
    /* 移动端通用间距优化 */
    section {
        padding: var(--section-padding);
    }
    
    .section-title {
        font-size: 2rem;
        margin-bottom: 16px;
    }
    
    .section-subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
        line-height: 1.6;
    }
}

/* 移动端触摸优化 */
@media (hover: none) and (pointer: coarse) {
    /* 触摸设备优化 */
    .btn,
    .filter-tab,
    .nav-link,
    .work-item,
    .social-item {
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    .btn {
        min-height: 44px; /* iOS推荐的最小触摸目标 */
    }
    
    .filter-tab {
        min-height: 40px;
    }
    
    .nav-link {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* 小屏手机优化 */
@media (max-width: 480px) {
    :root {
        --font-size-xl: 2rem;
        --font-size-lg: 1.5rem;
        --container-padding: 0 12px;
        --section-padding: 50px 0;
    }
    
    /* 容器进一步优化 */
    .container {
        padding: 0 12px;
    }
    
    /* 更小屏幕的字体和间距调整 */
    .hero {
        padding: 60px 0 40px;
    }
    
    .hero-name {
        font-size: 2rem;
    }
    
    .hero-name-en {
        font-size: 1.125rem;
    }
    
    .nav-container {
        padding: 0 16px;
    }
    
    .work-content {
        padding: 20px;
    }
    
    .philosophy-item {
        padding: 24px 20px;
    }
    
    .blog-item {
        padding: 24px;
    }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== Print Styles ===== */
/* ===== 懒加载图片样式 ===== */
img[loading="lazy"] {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* 当JavaScript设置为隐藏状态时，保持过渡效果 */
img[loading="lazy"][style*="opacity: 0"] {
    opacity: 0 !important;
}

@media print {
    .nav,
    .hero-scroll,
    .lightbox {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .hero {
        min-height: auto;
        padding: 40px 0;
    }
    
    section {
        page-break-inside: avoid;
    }
}