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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 背景视频 */
.background-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -9999;
    overflow: hidden;
}

.background-video video {
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

/* 背景图片 */
.background-image {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -9999;
    background-size: cover !important;
    background-position: center !important;
    background-repeat: no-repeat !important;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* 顶部导航 */
.header-nav {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: 
        0 4px 30px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.submit-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 
        0 8px 25px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.submit-btn:active {
    transform: translateY(0);
    box-shadow: 
        0 4px 15px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* 主推链接区 */
.hero-section {
    text-align: center;
    margin: 100px 0 80px;
    color: #fff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

/* 分类链接区 */
.links-section {
    margin-bottom: 80px;
    position: relative;
    z-index: 2;
}

.category {
    margin-bottom: 40px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.category:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.category-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #fff;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
}

.category-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
    margin-right: 10px;
}

/* 分类滚动容器 */
.category-scroll-container {
    position: relative;
    display: flex;
    align-items: center;
    padding: 0 50px;
}

/* 滚动按钮 */
.scroll-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.scroll-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.scroll-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: translateY(-50%);
}

.scroll-left {
    left: 0;
}

.scroll-right {
    right: 0;
}

/* 链接滚动区 - 完全隐藏滚动条 */
.link-scroll {
    flex: 1;
    overflow-x: hidden;
    padding: 10px 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.link-scroll::-webkit-scrollbar {
    display: none;
}

.link-list {
    display: flex;
    gap: 15px;
    min-width: max-content;
}

.link-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    border-radius: 15px;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    text-align: center;
    padding: 10px;
}

.link-item:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.link-item i {
    font-size: 2rem;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.link-item:hover i {
    transform: scale(1.2);
}

.link-item span {
    font-size: 0.9rem;
    font-weight: 500;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    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 (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .hero-section {
        margin: 60px 0 60px;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .hero-section p {
        font-size: 1rem;
    }

    .category {
        padding: 20px;
    }

    .category-title {
        font-size: 1.2rem;
    }

    .category-scroll-container {
        padding: 0 40px;
    }

    .scroll-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .scroll-left {
        left: 0;
    }

    .scroll-right {
        right: 0;
    }

    .link-item {
        width: 80px;
        height: 80px;
    }

    .link-item i {
        font-size: 1.5rem;
    }

    .link-item span {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .hero-section h1 {
        font-size: 1.8rem;
    }

    .hero-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .category {
        padding: 15px;
    }

    .category-scroll-container {
        padding: 0 35px;
    }

    .scroll-btn {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }

    .link-item {
        width: 70px;
        height: 70px;
    }

    .link-item i {
        font-size: 1.2rem;
    }

    .link-item span {
        font-size: 0.7rem;
    }
}