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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #dd1323 0%, #f08890 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-img {
    height: 40px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    transition: all 0.3s ease;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #667eea;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Carousel Section */
.hero-carousel {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    background: 
        /* 轻微遮罩层，让背景更清晰 */
        linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(248, 249, 250, 0.4) 100%),
        /* 你的背景图片 */
        url('statics/bg.jpg');
    background-size: 100% 100%, cover;
    background-position: 0 0, center center;
    background-repeat: no-repeat;
}

.hero-carousel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* 可选的额外纹理层 */
    background: 
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><defs><filter id="noiseFilter"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" stitchTiles="stitch"/></filter></defs><rect width="100%" height="100%" filter="url(%23noiseFilter)" opacity="0.05"/></svg>');
    opacity: 0.3;
    z-index: 1;
}

.carousel-container {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 120px 20px 80px;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.8s ease;
    z-index: 2;
}

.carousel-slide.active {
    opacity: 1;
    transform: translateX(0);
}

.carousel-slide.prev {
    transform: translateX(-100%);
}

.slide-content {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
    padding: 0 40px;
}

/* 第一个幻灯片（媒体源）使用左右布局 */
.carousel-slide:nth-child(1) .slide-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.carousel-slide:nth-child(1) .slide-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.carousel-slide:nth-child(1) .slide-right {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

/* 第二个幻灯片（格式支持）使用左右布局 */
.carousel-slide:nth-child(2) .slide-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.carousel-slide:nth-child(2) .slide-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.carousel-slide:nth-child(2) .slide-right {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 30px;
}

/* 第三个幻灯片（播放器优势）使用左右布局 */
.carousel-slide:nth-child(3) .slide-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.carousel-slide:nth-child(3) .slide-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.carousel-slide:nth-child(3) .slide-right {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 30px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(50px);
    animation: slideUp 0.8s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
    background: linear-gradient(135deg, #dd1323 0%, #f08890 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #666;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease 0.4s forwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease 0.6s forwards;
}

.btn-primary, .btn-secondary {
    padding: 16px 32px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #dd1323 0%, #f08890 100%);
    color: white;
    box-shadow: 0 10px 30px rgba(221, 19, 35, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(221, 19, 35, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #333;
    border: 2px solid #333;
}

.btn-secondary:hover {
    background: #333;
    color: white;
    transform: translateY(-2px);
}

/* Slide Visuals */
.slide-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}


/* Format Showcase */
.format-showcase {
    width: 100%;
    max-width: 500px;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
}

.format-image {
    max-width: 100%;
    max-height: 250px;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: all 0.3s ease;
    background: transparent;
}

.format-image:hover {
    transform: scale(1.03);
}



/* Advantages Showcase */
.advantages-showcase {
    width: 100%;
    max-width: 500px;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.2);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    border-radius: 50%;
    background: linear-gradient(135deg, #dd1323 0%, #f08890 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.advantage-item:hover .advantage-icon {
    transform: scale(1.1);
}

.advantage-icon i {
    font-size: 1.5rem;
    color: white;
}

.advantage-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

.advantage-item p {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.4;
}

/* Carousel Controls */
.carousel-controls {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 60px;
    z-index: 10;
    pointer-events: none;
}

.carousel-btn {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #333;
    transition: all 0.3s ease;
    pointer-events: auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.carousel-btn:hover {
    background: white;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* Carousel Indicators */
.carousel-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: white;
    transform: scale(1.2);
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

/* Features Section */
.features {
    padding: 120px 0;
    background: #ffffff;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 80px;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 20px;
    background: #f8f9fa;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    background: #ffffff;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #dd1323 0%, #f08890 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Media Sources Section */
.media-sources {
    padding: 120px 0;
    background: #f8f9fa;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.sources-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 40px 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.source-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.source-item:hover {
    transform: translateY(-5px);
}

.source-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 12px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.source-item:hover .source-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.source-icon img {
    width: 100%;
    height: 100%;
    border-radius: 12px;
    object-fit: cover;
}

.source-name {
    font-size: 0.9rem;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.source-item:hover .source-name {
    color: #667eea;
}

/* Download Section */
.download {
    padding: 120px 0;
    background: #ffffff;
}

.download-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: #666;
    margin-bottom: 60px;
}

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

.download-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 20px;
    background: #f8f9fa;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
    cursor: pointer;
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    background: #ffffff;
}

.platform-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.platform-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.download-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

.download-card p {
    color: #666;
    margin-bottom: 24px;
}

.download-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(135deg, #dd1323 0%, #f08890 100%);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 auto;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(221, 19, 35, 0.3);
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 80px 0 40px;
}

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

.footer-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #dd1323 0%, #f08890 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-logo {
    margin-bottom: 16px;
}

.footer-logo-img {
    height: 30px;
    width: auto;
    max-width: 120px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    transition: all 0.3s ease;
}

.footer-logo-img:hover {
    transform: scale(1.05);
    filter: brightness(0) invert(1) drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 16px;
}

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

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #667eea;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #dd1323;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #ccc;
}

/* Animations */
@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .carousel-controls {
        padding: 0 50px;
    }
    
    .sources-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 30px 15px;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .slide-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
        padding: 0 20px;
        max-width: 90%;
    }
    
    /* 第一个幻灯片在移动端的布局 */
    .carousel-slide:nth-child(1) .slide-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .carousel-slide:nth-child(1) .slide-left {
        align-items: center;
        text-align: center;
    }
    
    .carousel-slide:nth-child(1) .slide-right {
        align-items: center;
        text-align: center;
    }
    
    /* 第二个幻灯片在移动端的布局 */
    .carousel-slide:nth-child(2) .slide-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .carousel-slide:nth-child(2) .slide-left {
        align-items: center;
        text-align: center;
    }
    
    .carousel-slide:nth-child(2) .slide-right {
        gap: 20px;
        align-items: center;
        text-align: center;
    }
    
    /* 第三个幻灯片在移动端的布局 */
    .carousel-slide:nth-child(3) .slide-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .carousel-slide:nth-child(3) .slide-left {
        align-items: center;
        text-align: center;
    }
    
    .carousel-slide:nth-child(3) .slide-right {
        gap: 20px;
        align-items: center;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    
    
    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .sources-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 25px 10px;
    }
    
    .carousel-controls {
        padding: 0 30px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .sources-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px 8px;
    }
    
    .btn-primary, .btn-secondary {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    
    
    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .carousel-controls {
        padding: 0 15px;
    }
    
    .carousel-btn {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
    
    .logo-img {
        height: 35px;
        max-width: 120px;
    }
    
    .footer-logo-img {
        height: 25px;
        max-width: 100px;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading states */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}