/* 首页样式 - 极简沉浸式风格 */
.home-container {
    min-height: 100vh;
    background: #0a0a0a;
}

/* 顶部导航栏 */
.top-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 60px;
    background: linear-gradient(180deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0) 100%);
    backdrop-filter: blur(10px);
}

.top-navbar .navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.5px;
}

.top-navbar .navbar-menu {
    display: flex;
    gap: 45px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.top-navbar .navbar-menu a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 400;
    transition: color 0.3s ease;
    position: relative;
}

.top-navbar .navbar-menu a:hover {
    color: white;
}

.top-navbar .navbar-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: white;
    transition: width 0.3s ease;
}

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

.btn-nav {
    padding: 12px 32px;
    background: white;
    color: #0a0a0a;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.3);
}

/* 全屏英雄区 */
.hero-fullscreen {
    position: relative;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* 视频背景容器 */
.hero-video-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-video-background video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    filter: brightness(0.6);
    transition: opacity 0.5s ease;
}

/* 视频遮罩层 */
.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.5) 100%);
    z-index: 1;
    pointer-events: none;
}

.hero-content-main {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    animation: fadeInUp 1s ease;
}

.hero-title-large {
    font-size: 5rem;
    font-weight: 300;
    line-height: 1.4;
    margin-bottom: 40px;
    letter-spacing: 0.15em;
    text-transform: none;
}

.hero-title-large .italic {
    font-style: italic;
    font-weight: 300;
}

/* 隐藏左下描述文字 */
.hero-description {
    display: none;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 底部导航标签 */
.bottom-tabs {
    position: absolute;
    bottom: 60px;
    left: 60px;
    z-index: 3;
    display: flex;
    gap: 40px;
}

.tab-item {
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
    cursor: pointer;
    padding: 0 0 8px 0;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
    font-weight: 400;
}

.tab-item.active {
    color: white;
    border-bottom-color: white;
}

.tab-item:hover {
    color: white;
}

.tab-count {
    font-size: 0.9rem;
    margin-left: 5px;
}

/* 推荐卡片 - 简洁小巧设计 */
.featured-cards {
    position: absolute;
    bottom: 60px;
    right: 60px;
    z-index: 3;
    display: flex;
    gap: 20px;
}

.card-item {
    width: 160px;
    background: transparent;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.card-item:hover {
    transform: translateY(-8px);
}

.card-image {
    width: 100%;
    height: 120px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    position: relative;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.card-image::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    opacity: 0.6;
    z-index: 1;
}

.card-item:hover .card-image {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.2);
}

.card-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.card-item:hover img {
    transform: scale(1.08);
}

.card-label {
    margin-top: 12px;
    font-size: 0.95rem;
    color: white;
    font-weight: 400;
    text-align: left;
    padding-left: 4px;
}

.card-label .plus {
    font-weight: 300;
    margin-left: 2px;
}

/* 备案号 */
.beian-info {
    position: absolute;
    bottom: 30px;
    right: 60px;
    z-index: 10;
}

.beian-info a {
    color: white;
    font-size: 0.475rem;
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.3s ease;
    font-weight: 400;
}

.beian-info a:hover {
    opacity: 1;
}

/* 添加一些装饰性十字元素（参考设计图） */
.hero-fullscreen::before,
.hero-fullscreen::after {
    content: '+';
    position: absolute;
    color: rgba(255, 255, 255, 0.15);
    font-size: 2rem;
    font-weight: 300;
    z-index: 1;
}

.hero-fullscreen::before {
    top: 100px;
    left: 150px;
}

.hero-fullscreen::after {
    top: 100px;
    right: 150px;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .featured-cards {
        gap: 15px;
        right: 30px;
    }
    
    .card-item {
        width: 140px;
    }

    .card-image {
        height: 105px;
    }
    
    .beian-info {
        bottom: 25px;
        right: 30px;
    }
}

@media (max-width: 768px) {
    .top-navbar {
        padding: 20px 30px;
        flex-wrap: wrap;
    }

    .top-navbar .navbar-menu {
        display: none;
    }
    
    .hero-title-large {
        font-size: 2.5rem;
        padding: 0 20px;
        letter-spacing: 0.1em;
    }
    
    .bottom-tabs {
        left: 30px;
        bottom: 30px;
        gap: 20px;
    }

    .tab-item {
        font-size: 0.9rem;
    }
    
    .featured-cards {
        right: 20px;
        bottom: 30px;
        gap: 12px;
    }

    .card-item {
        width: 120px;
    }

    .card-image {
        height: 90px;
    }

    .card-label {
        font-size: 0.85rem;
        margin-top: 8px;
    }
    
    .beian-info {
        bottom: 20px;
        right: 20px;
    }
    
    .beian-info a {
        font-size: 0.425rem;
    }
}