:root {
    --primary-color: #1a73e8;
    --primary-color-rgb: 26, 115, 232;
    --secondary-color: #202124;
    --text-color: #333;
    --background-color: #fff;
    --border-radius: 8px;
    --transition-duration: 0.3s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    background: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: rgba(var(--primary-color-rgb), 0.8);
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

@media only screen and (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
}

header {
    position: relative;
    background: linear-gradient(135deg, var(--secondary-color), #444);
    color: white;
    padding: 60px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    z-index: 10;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.05), transparent);
    pointer-events: none;
}

.header-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.header-left {
    text-align: center;
}

.header-right {
    text-align: left;
}

.header-title {
    font-size: 2.4rem;
    margin-bottom: 24px;
    color: white;
    line-height: 1.2;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.header-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.header-highlight {
    position: relative;
    background: rgba(255, 255, 255, 0.12);
    padding: 28px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(6px);
    line-height: 1.8;
    font-size: 1.1rem;
}

.header-highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    box-shadow: 0 0 8px rgba(var(--primary-color-rgb), 0.3);
}

.header-highlight p {
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

@media only screen and (max-width: 768px) {
    .header-highlight {
        padding: 20px;
        font-size: 1rem;
    }
}

@media only screen and (max-width: 768px) {
    header {
        padding: 40px 0;
    }
    
    .header-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .header-title {
        font-size: 2rem;
        margin-bottom: 16px;
    }
    
    .header-buttons {
        justify-content: center;
    }
    
    .header-highlight {
        padding: 16px;
    }
}

footer {
    position: relative;
    background: var(--secondary-color);
    color: white;
    text-align: center;
    padding: 40px 0;
    margin-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), rgba(var(--primary-color-rgb), 0.5));
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

footer a {
    position: relative;
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-duration) ease;
    padding: 4px 0;
}

footer a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background: var(--primary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-duration) ease;
}

footer a:hover {
    color: rgba(var(--primary-color-rgb), 0.9);
}

footer a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.footer-social {
    margin-top: 20px;
}

.footer-social a {
    display: inline-block;
    margin: 0 8px;
    font-size: 1.2rem;
}

@media only screen and (max-width: 768px) {
    footer {
        padding: 32px 0;
        margin-top: 60px;
    }
    
    .footer-content {
        padding: 0 16px;
    }
    
    .footer-social a {
        margin: 0 6px;
        font-size: 1.1rem;
    }
}

@media only screen and (max-width: 768px) {
    .header-grid {
        grid-template-columns: 1fr;
        gap: 24px;
        text-align: center;
    }
    
    .header-buttons {
        justify-content: center;
    }
    
    .header-highlight {
        padding: 16px;
    }
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
    overflow: hidden; /* Clear float */
}

#contact-info {
    position: relative;
    margin-bottom: 48px;
    background: rgba(var(--primary-color-rgb), 0.05);
    padding: 40px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-duration) ease;
    overflow: hidden;
}

#contact-info::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform var(--transition-duration) ease;
}

#contact-info:hover {
    background: rgba(var(--primary-color-rgb), 0.08);
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

#contact-info:hover::before {
    transform: scaleY(1);
    transform-origin: top;
}

#contact-info p {
    margin: 12px 0;
    color: var(--text-color);
    line-height: 1.8;
    position: relative;
    padding-left: 24px;
}

#contact-info p::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.6;
    transition: opacity var(--transition-duration) ease;
}

#contact-info:hover p::before {
    opacity: 1;
}

#contact-info a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-duration) ease;
}

#contact-info a:hover {
    color: rgba(var(--primary-color-rgb), 0.8);
    text-decoration: underline;
}

@media only screen and (max-width: 768px) {
    #contact-info {
        padding: 32px;
    }
    
    #contact-info p {
        padding-left: 20px;
    }
}

@media only screen and (max-width: 480px) {
    #contact-info {
        padding: 24px;
    }
    
    #contact-info p {
        padding-left: 16px;
    }
}

.section h2 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
}

.section h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: width var(--transition-duration) ease;
}

.section:hover h2::after {
    width: 120px;
}

.section p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1.6rem;
}

.section ul {
    padding-left: 2rem;
    margin-bottom: 1.6rem;
}

.section li {
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.6;
    position: relative;
}

.section li::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
}

.section li::marker {
    color: var(--primary-color);
}

@media only screen and (max-width: 768px) {
    .section {
        padding: 32px;
        margin-bottom: 40px;
    }
    
    .section h2 {
        font-size: 1.6rem;
        margin-bottom: 1.6rem;
    }
    
    .section p {
        font-size: 0.95rem;
    }
    
    .section ul {
        padding-left: 1.5rem;
    }
}

@media only screen and (max-width: 480px) {
    .section {
        padding: 24px;
    }
    
    .section h2 {
        font-size: 1.4rem;
        margin-bottom: 1.2rem;
    }
    
    .section p {
        font-size: 0.9rem;
    }
    
    .section ul {
        padding-left: 1.2rem;
    }
}

h1, h2 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #333;
}

p {
    font-size: 16px;
    margin-bottom: 10px;
    color: #555;
}

.photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 24px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    object-fit: cover;
    background: #fff;
    padding: 4px;
}

.photo:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

@media only screen and (max-width: 768px) {
    .photo {
        width: 120px;
        height: 120px;
        margin-bottom: 16px;
    }
}

.left {
    margin-bottom: 24px;
    text-align: center;
}

.time {
    position: fixed;
    bottom: 24px;
    right: 24px;
    font-size: 1rem;
    font-weight: 500;
    padding: 14px 24px;
    background: rgba(var(--primary-color-rgb), 0.1);
    border-radius: var(--border-radius);
    color: var(--text-color);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    z-index: 100;
    transition: all var(--transition-duration) ease;
    transform-style: preserve-3d;
}

.time:hover {
    background: rgba(var(--primary-color-rgb), 0.15);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.time span {
    font-weight: 600;
    color: var(--primary-color);
    margin-left: 4px;
    position: relative;
}

.time span::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-duration) ease;
}

.time:hover span::after {
    transform: scaleX(1);
    transform-origin: left;
}

@media only screen and (max-width: 768px) {
    .time {
        bottom: 16px;
        right: 16px;
        font-size: 0.9rem;
        padding: 12px 20px;
    }
}

@media only screen and (max-width: 480px) {
    .time {
        bottom: 12px;
        right: 12px;
        font-size: 0.85rem;
        padding: 10px 16px;
    }
}

.code-block {
    position: relative;
    margin: 24px 0;
    background: rgba(var(--primary-color-rgb), 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

pre {
    margin: 0;
    padding: 24px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-color);
    tab-size: 4;
    overflow-x: auto;
    background: transparent;
}

pre code {
    display: block;
    white-space: pre;
    overflow-x: auto;
}

.code-block-header {
    padding: 8px 16px;
    background: rgba(var(--primary-color-rgb), 0.08);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-size: 0.8rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.code-block-header::before {
    content: '';
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ff5f56;
    box-shadow: 20px 0 #ffbd2e, 40px 0 #27c93f;
}

@media only screen and (max-width: 768px) {
    .code-block {
        margin: 16px 0;
    }
    
    pre {
        padding: 16px;
        font-size: 0.8rem;
    }
    
    .code-block-header {
        padding: 6px 12px;
        font-size: 0.75rem;
    }
}

.highlight {
    position: relative;
    background: rgba(var(--primary-color-rgb), 0.05);
    padding: 24px;
    margin: 32px 0;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-duration) ease;
    overflow: hidden;
}

.highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
}

.highlight:hover {
    background: rgba(var(--primary-color-rgb), 0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.highlight p {
    margin: 0 0 12px 0;
    color: var(--text-color);
    line-height: 1.8;
}

.highlight p:last-child {
    margin-bottom: 0;
}

.highlight a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-duration) ease;
}

.highlight a:hover {
    color: rgba(var(--primary-color-rgb), 0.8);
    text-decoration: underline;
}

@media only screen and (max-width: 768px) {
    .highlight {
        padding: 16px;
        margin: 24px 0;
    }
    
    .highlight::before {
        width: 3px;
    }
}

.media-grid {
    position: relative;
    display: grid;
    gap: 32px;
    padding: 32px;
    background: rgba(var(--primary-color-rgb), 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.05);
    margin: 48px 0;
    overflow: hidden;
}

.media-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform var(--transition-duration) ease;
}

.media-grid:hover::before {
    transform: scaleY(1);
    transform-origin: top;
}

.gallery-container {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.video-container {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.media-item {
    position: relative;
    background: var(--background-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-duration) ease;
    transform-style: preserve-3d;
}

.media-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0);
    transition: background var(--transition-duration) ease;
    z-index: 1;
}

.media-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.media-item:hover::before {
    background: rgba(0, 0, 0, 0.05);
}

.media-container {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    perspective: 1000px;
}

.media-container img,
.media-container video {
    width: 100%;
    height: 240px;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-duration) ease;
    transform-origin: center center;
}

.media-container:hover img,
.media-container:hover video {
    transform: scale(1.08);
}

.media-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(var(--primary-color-rgb), 0);
    transition: background var(--transition-duration) ease;
}

.media-container:hover .media-overlay {
    background: rgba(var(--primary-color-rgb), 0.1);
}

.media-caption {
    position: relative;
    padding: 16px;
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-color);
    text-align: center;
    background: var(--background-color);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1;
}

.media-caption::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(var(--primary-color-rgb), 0.02);
    z-index: -1;
}

@media only screen and (max-width: 768px) {
    .media-grid {
        gap: 24px;
        padding: 24px;
        margin: 40px 0;
    }
    
    .gallery-container {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .video-container {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
    
    .media-container img,
    .media-container video {
        height: 200px;
    }
    
    .media-caption {
        font-size: 0.9rem;
        padding: 12px;
    }
}

@media only screen and (max-width: 480px) {
    .media-grid {
        gap: 16px;
        padding: 16px;
    }
    
    .gallery-container {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    
    .video-container {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
    
    .media-container img,
    .media-container video {
        height: 180px;
    }
    
    .media-caption {
        font-size: 0.85rem;
        padding: 8px;
    }
}

:root {
    --primary-color-rgb: 26, 115, 232;
}

.downloads {
    position: relative;
    padding: 40px;
    background: rgba(var(--primary-color-rgb), 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.05);
    margin: 48px 0;
    overflow: hidden;
}

.downloads::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform var(--transition-duration) ease;
}

.downloads:hover::before {
    transform: scaleY(1);
    transform-origin: top;
}

.downloads ul {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.downloads li {
    margin: 0;
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    transition: all var(--transition-duration) ease;
}

.downloads li:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(var(--primary-color-rgb), 0.1);
}

.downloads a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: rgba(var(--primary-color-rgb), 0.08);
    border-radius: var(--border-radius);
    color: var(--text-color);
    text-decoration: none;
    transition: all var(--transition-duration) ease;
}

.downloads a:hover {
    background: rgba(var(--primary-color-rgb), 0.12);
    color: var(--primary-color);
}

.downloads i {
    font-size: 1.2em;
    transition: transform var(--transition-duration) ease;
}

.downloads a:hover i {
    transform: translateX(4px);
}

@media only screen and (max-width: 768px) {
    .downloads {
        padding: 32px;
        margin: 40px 0;
    }
    
    .downloads ul {
        gap: 12px;
    }
    
    .downloads a {
        padding: 14px 20px;
    }
}

@media only screen and (max-width: 480px) {
    .downloads {
        padding: 24px;
    }
    
    .downloads ul {
        grid-template-columns: 1fr;
    }
    
    .downloads a {
        padding: 12px 16px;
    }
}

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-duration) ease;
    font-size: 0.95rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    user-select: none;
    overflow: hidden;
    transform-style: preserve-3d;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300%;
    height: 300%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2), transparent);
    transform: translate(-50%, -50%) scale(0);
    transition: transform var(--transition-duration) ease;
    z-index: -1;
}

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0);
    transition: background var(--transition-duration) ease;
}

.btn:hover {
    background: rgba(var(--primary-color-rgb), 0.9);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 6px 20px rgba(var(--primary-color-rgb), 0.2);
}

.btn:hover::before {
    transform: translate(-50%, -50%) scale(1);
}

.btn:hover::after {
    background: rgba(255, 255, 255, 0.05);
}

.btn:active {
    transform: translateY(0) scale(1);
    box-shadow: 0 2px 6px rgba(var(--primary-color-rgb), 0.2);
}

.btn i {
    font-size: 0.9em;
    transition: transform var(--transition-duration) ease;
}

.btn:hover i {
    transform: translateX(4px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: rgba(var(--primary-color-rgb), 0.1);
}

.btn-download {
    min-width: 240px;
    position: relative;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
}

.btn-download::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(255, 255, 255, 0.2);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-duration) ease;
}

.btn-download:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.btn-download i {
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

@media only screen and (max-width: 768px) {
    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .btn-download {
        min-width: 200px;
        padding: 14px 24px;
        font-size: 0.95rem;
    }
}

@media only screen and (max-width: 480px) {
    .btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }
    
    .btn-download {
        min-width: 100%;
        padding: 12px 20px;
        font-size: 0.9rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 响应式设计 */
@media only screen and (max-width: 768px) {
    .gallery-container, .video-container {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .downloads a, .btn-download {
        padding: 10px 16px;
        font-size: 0.8rem;
    }
}

@media only screen and (max-width: 480px) {
    .gallery-container, .video-container {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .downloads a, .btn-download {
        width: 100%;
        justify-content: center;
    }
}