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

body {
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 999;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo:hover {
    color: #3498db;
}

.nav-logo {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: bold;
    color: #2c3e50;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
    padding: 0;
    background: transparent;
    border: none;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: #2c3e50;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu {
    display: none;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: #3498db;
}

.nav-links a:hover::after {
    width: 100%;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
}

.announcements-bar {
    background: linear-gradient(135deg, #ff6b6b 0%, #ffa500 100%);
    padding: 12px 0;
    overflow: hidden;
}

.announcements-bar .container {
    display: flex;
    align-items: center;
}

.announcement-icon {
    font-size: 1.3rem;
    margin-right: 15px;
    flex-shrink: 0;
}

.marquee-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.marquee-content {
    display: flex;
    animation: marquee-scroll 30s linear infinite;
    white-space: nowrap;
}

.marquee-content:hover {
    animation-play-state: paused;
}

.marquee-item {
    display: inline-flex;
    align-items: center;
    padding: 0 50px;
    color: white;
    font-size: 1rem;
}

.marquee-item strong {
    margin-right: 10px;
}

.marquee-separator {
    color: rgba(255, 255, 255, 0.6);
}

@keyframes marquee-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@media (max-width: 768px) {
    .announcements-bar {
        padding: 10px 0;
    }
    
    .announcement-icon {
        font-size: 1.1rem;
        margin-right: 10px;
    }
    
    .marquee-item {
        padding: 0 30px;
        font-size: 0.9rem;
    }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-logo {
    max-width: 800px;
    height: auto;
    margin-top: 0;
    margin-bottom: 10px;
    animation: fadeInUp 1s ease;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease 0.2s both;
}

.hero .subtitle {
    font-size: 1.5rem;
    margin-bottom: 15px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero .description {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease 0.4s both;
}

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

.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: white;
    color: #667eea;
    animation: fadeInUp 1s ease 0.6s both;
}

.author-section {
    margin-top: 60px;
    animation: fadeInUp 1s ease 0.8s both;
    text-align: center;
}

.author-section .author-title {
    color: white;
    font-size: 1.1rem;
    margin-bottom: 10px;
    opacity: 0.9;
}

.author-section .author-link {
    margin-top: 5px;
}

.author-section .author-link a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    opacity: 0.9;
    transition: all 0.3s ease;
    border-bottom: 1px dotted rgba(255, 255, 255, 0.7);
    padding-bottom: 2px;
}

.author-section .author-link a:hover {
    opacity: 1;
    border-bottom-style: solid;
}

.video-intro {
    margin-top: 60px;
    text-align: center;
    animation: fadeInUp 1s ease 1s both;
}

.video-intro .video-title {
    color: white;
    font-size: 1.1rem;
    margin-bottom: 8px;
    opacity: 0.9;
}

.video-intro .video-desc {
    color: white;
    font-size: 0.95rem;
    opacity: 0.7;
    font-style: italic;
    margin-bottom: 15px;
}

.video-intro .author-link {
    margin-top: 10px;
}

.video-intro .author-link a {
    color: #fb7299;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 20px;
    border-radius: 20px;
    transition: all 0.3s ease;
    display: inline-block;
}

.video-intro .author-link a:hover {
    background: rgba(251, 114, 153, 0.2);
    transform: scale(1.05);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-download {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 50px;
    font-size: 1.2rem;
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.features {
    padding: 100px 20px;
    background: white;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #2c3e50;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #f8f9fa;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.feature-card p {
    color: #666;
    line-height: 1.8;
}

.download-section {
    padding: 100px 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.download-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #2c3e50;
}

.download-card {
    background: white;
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.download-info {
    flex: 1;
    min-width: 300px;
}

.download-info h3 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 15px;
}

.download-description {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.download-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    color: #888;
    font-size: 0.95rem;
}

.download-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.download-icon {
    margin-right: 10px;
}

.download-note {
    color: #888;
    font-size: 0.9rem;
}

.installation {
    padding: 100px 20px;
    background: white;
}

.installation h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #2c3e50;
}

.install-steps {
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.step:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    border-radius: 50%;
    margin-right: 20px;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.2rem;
    color: #2c3e50;
    margin-bottom: 8px;
}

.step-content p {
    color: #666;
    line-height: 1.6;
}

.gallery {
    padding: 100px 20px;
    background: white;
}

.gallery h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #2c3e50;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    aspect-ratio: 16 / 9;
    background: #f0f0f0;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.contact {
    padding: 100px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.contact > .container > p {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

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

.footer {
    background: #2c3e50;
    color: white;
    padding: 30px 20px;
    text-align: center;
}

.footer p {
    opacity: 0.8;
}

.sponsor-section {
    min-height: 100vh;
    padding: 120px 20px 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.sponsor-section h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.sponsor-intro {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 50px;
    opacity: 0.9;
    line-height: 1.8;
}

.sponsor-grid {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.sponsor-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    width: 300px;
    transition: transform 0.3s ease;
}

.sponsor-card:hover {
    transform: translateY(-10px);
}

.sponsor-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.sponsor-card h2 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 25px;
}

.qrcode-container {
    background: #f5f5f5;
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 15px;
}

.qrcode {
    width: 280px;
    height: 280px;
    object-fit: contain;
    border-radius: 10px;
}

.sponsor-tip {
    color: #888;
    font-size: 0.95rem;
}

.sponsor-thanks {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 15px;
    display: inline-block;
    margin-bottom: 40px;
}

.sponsor-thanks h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.sponsor-thanks p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.thanks-section {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px 20px;
    border-radius: 15px;
    max-width: 600px;
    margin: 0 auto;
}

.thanks-section h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.thanks-scroller {
    height: 150px;
    overflow: hidden;
    position: relative;
}

.thanks-list {
    position: absolute;
    width: 100%;
    animation: scrollUp 20s linear infinite;
}

.thanks-item {
    padding: 8px 0;
    font-size: 1.1rem;
    color: white;
    text-align: center;
}

@keyframes scrollUp {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-50%);
    }
}

.changelog-section {
    min-height: 100vh;
    padding: 120px 20px 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.changelog-section h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.changelog-intro {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 50px;
    opacity: 0.9;
}

.changelog-timeline {
    max-width: 700px;
    margin: 0 auto;
    text-align: left;
}

.changelog-item {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    color: #333;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.changelog-version {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.changelog-date {
    color: #888;
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.changelog-content h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 15px;
}

.changelog-content ul {
    list-style: none;
    padding: 0;
}

.changelog-content li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: #555;
}

.changelog-content li::before {
    content: '•';
    color: #667eea;
    font-weight: bold;
    position: absolute;
    left: 5px;
}

.image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.image-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
}

.image-modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}

.image-modal-img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 10px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.image-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.image-modal-close:hover {
    transform: scale(1.2);
}

@media (pointer: coarse), (max-width: 768px), (max-height: 500px) {
    .navbar {
        z-index: 999;
    }
    
    .navbar .container {
        padding: 10px 15px;
    }
    
    .nav-logo {
        height: 25px;
    }
    
    .logo-text {
        font-size: 1rem;
    }
    
    .nav-links {
        display: none !important;
    }
    
    .mobile-menu-btn {
        display: flex !important;
        flex-shrink: 0;
    }
    
    .mobile-menu-btn span {
        background: #2c3e50;
    }
    
    .mobile-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.95);
        z-index: 1000;
        padding: 70px 20px;
    }
    
    .mobile-menu.active {
        display: flex;
        flex-direction: column;
    }
    
    .mobile-menu-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0 0 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        margin-bottom: 20px;
    }
    
    .mobile-menu-header span {
        color: white;
        font-size: 1.2rem;
        font-weight: bold;
    }
    
    .mobile-close-btn {
        color: white;
        font-size: 1.5rem;
        cursor: pointer;
        padding: 5px 10px;
    }
    
    .mobile-nav-links {
        list-style: none;
        text-align: center;
    }
    
    .mobile-nav-links li {
        margin-bottom: 20px;
    }
    
    .mobile-nav-links a {
        color: white;
        font-size: 1.3rem;
        text-decoration: none;
        display: block;
        padding: 10px 0;
    }
    
    .hero {
        padding: 80px 15px;
    }
    
    .hero-logo {
        max-width: 100%;
        height: auto;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero .subtitle {
        font-size: 1.1rem;
    }
    
    .hero .description {
        font-size: 1rem;
        padding: 0 10px;
    }
    
    .btn {
        padding: 12px 30px;
        font-size: 1rem;
    }
    
    .features {
        padding: 60px 15px;
    }
    
    .features h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .feature-grid {
        gap: 20px;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .download-section {
        padding: 60px 15px;
    }
    
    .download-section h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .download-card {
        flex-direction: column;
        text-align: center;
        padding: 30px 20px;
    }
    
    .download-info h3 {
        font-size: 1.5rem;
    }
    
    .download-meta {
        justify-content: center;
        flex-direction: column;
        gap: 10px;
    }
    
    .gallery {
        padding: 60px 15px;
    }
    
    .gallery h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .gallery-item {
        aspect-ratio: 16 / 10;
    }
    
    .installation {
        padding: 60px 15px;
    }
    
    .installation h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .install-steps {
        padding: 0 10px;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
        padding: 20px 15px;
    }
    
    .step-number {
        margin: 0 auto 15px;
    }
    
    .contact {
        padding: 60px 15px;
    }
    
    .contact h2 {
        font-size: 2rem;
    }
    
    .contact > .container > p {
        font-size: 1rem;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer {
        padding: 20px 15px;
    }
    
    .footer p {
        font-size: 0.9rem;
    }
    
    .sponsor-section {
        padding: 100px 15px 40px;
    }
    
    .sponsor-section h1 {
        font-size: 2.5rem;
    }
    
    .sponsor-intro {
        font-size: 1rem;
        padding: 0 10px;
    }
    
    .sponsor-grid {
        gap: 30px;
    }
    
    .sponsor-card {
        width: 100%;
        max-width: 320px;
        padding: 30px 20px;
    }
    
    .sponsor-icon {
        font-size: 2.5rem;
    }
    
    .sponsor-card h2 {
        font-size: 1.3rem;
    }
    
    .qrcode {
        width: 240px;
        height: 240px;
    }
    
    .sponsor-thanks {
        padding: 20px;
    }
    
    .sponsor-thanks h3 {
        font-size: 1.5rem;
    }
    
    .sponsor-thanks p {
        font-size: 1rem;
    }
    
    .thanks-section {
        padding: 20px 15px;
    }
    
    .thanks-section h3 {
        font-size: 1.3rem;
    }
    
    .thanks-scroller {
        height: 120px;
    }
    
    .thanks-item {
        font-size: 1rem;
    }
    
    .video-intro {
        margin-top: 40px;
    }
    
    .video-intro .video-title {
        font-size: 1rem;
    }
    
    .video-intro .video-desc {
        font-size: 0.9rem;
        padding: 0 20px;
    }
    
    .video-intro .author-link a {
        font-size: 0.9rem;
        padding: 6px 15px;
    }
    
    .image-modal-close {
        top: -35px;
        font-size: 2rem;
    }
}