/* reset & 深色魅蓝基调 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: radial-gradient(circle at 10% 20%, #0a1928, #051a2c);
    font-family: 'Segoe UI', 'Roboto', 'Poppins', system-ui, sans-serif;
    color: #eef4ff;
    line-height: 1.5;
    padding: 20px;
    min-height: 100vh;
}

/* 极光顶部按钮 */
.aurora-banner {
    text-align: center;
    margin-bottom: 45px;
}
.meizu-btn {
    display: inline-block;
    background: linear-gradient(95deg, #1f6392, #0d3b5a);
    border: 1px solid #3bc0fc;
    border-radius: 48px;
    padding: 14px 40px;
    font-size: 1.2rem;
    font-weight: bold;
    color: #ffffff;
    text-decoration: none;
    letter-spacing: 2px;
    box-shadow: 0 0 12px rgba(59,192,252,0.4);
    transition: 0.2s;
    backdrop-filter: blur(4px);
}
.meizu-btn:hover {
    background: linear-gradient(95deg, #2b7ab0, #145a82);
    box-shadow: 0 0 20px #3bc0fc;
    transform: scale(1.02);
    color: #fbffb9;
}

/* 主容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 每组样式 */
.video-group {
    margin-bottom: 60px;
}
.group-title {
    font-size: 1.6rem;
    font-weight: 600;
    background: rgba(10, 35, 55, 0.75);
    backdrop-filter: blur(8px);
    display: inline-block;
    padding: 6px 28px;
    border-radius: 40px;
    margin-bottom: 28px;
    letter-spacing: 1px;
    color: #b9e6ff;
    border-left: 6px solid #3bc0fc;
    font-family: monospace;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* 网格 PC一排5 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

/* 卡片硬朗科技风 */
.video-card {
    background: rgba(8, 28, 45, 0.7);
    backdrop-filter: blur(6px);
    border-radius: 18px;
    overflow: hidden;
    transition: all 0.25s ease;
    border: 1px solid #2c7da0;
    box-shadow: 0 8px 18px rgba(0,0,0,0.4);
}
.video-card:hover {
    transform: translateY(-6px);
    border-color: #61dafb;
    box-shadow: 0 16px 28px rgba(0,180,255,0.2);
    background: rgba(18, 48, 70, 0.85);
}

/* 9:16 图片 */
.image-link {
    display: block;
    text-decoration: none;
}
.img-wrapper {
    position: relative;
    aspect-ratio: 9 / 16;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: transform 0.2s;
}
.video-card:hover .img-wrapper {
    transform: scale(1.01);
}

/* 霓虹播放图标 */
.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 54px;
    height: 54px;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    border-radius: 50%;
    transition: all 0.2s;
    cursor: pointer;
    border: 1.5px solid #3bc0fc;
}
.play-icon::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 56%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 11px 0 11px 20px;
    border-color: transparent transparent transparent #fff;
}
.image-link:hover .play-icon {
    background: #ff8c42;
    transform: translate(-50%, -50%) scale(1.15);
    border-color: #fffac2;
}
.image-link:hover .play-icon::after {
    border-left-color: #000;
}

/* 卡片信息区：关键词链接 + 描述 */
.card-info {
    padding: 14px 12px 16px;
    text-align: center;
}
.keyword-link {
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    color: #f0fcb6;
    background: #0c2e44;
    padding: 5px 14px;
    border-radius: 32px;
    display: inline-block;
    transition: 0.2s;
    border: 0.5px solid #3bb3e0;
}
.keyword-link:hover {
    background: #f0a500;
    color: #031e2c;
    border-color: white;
}
.keyword-desc {
    font-size: 0.7rem;
    color: #b8e2ff;
    margin-top: 10px;
    line-height: 1.3;
    letter-spacing: 0.3px;
    background: rgba(0,0,0,0.35);
    border-radius: 20px;
    padding: 6px 6px;
    word-break: break-all;
}

/* 高密度关键词区 霓虹灯带 */
.keyword-neon {
    background: rgba(2, 25, 40, 0.8);
    backdrop-filter: blur(16px);
    border-radius: 60px;
    padding: 20px 28px;
    margin: 50px 0 30px;
    text-align: center;
    font-size: 0.85rem;
    border: 1px solid #2b9bcb;
    box-shadow: 0 0 12px rgba(59,192,252,0.3);
}
.keyword-neon span {
    font-size: 1rem;
    font-weight: bold;
    background: #0f4468;
    padding: 5px 14px;
    border-radius: 40px;
    margin-right: 12px;
    color: #fee3a0;
}
.keyword-neon a {
    text-decoration: none;
    color: #c2edff;
    margin: 0 5px;
    line-height: 2;
    display: inline-block;
    transition: 0.1s;
}
.keyword-neon a:hover {
    color: #ffb347;
    text-shadow: 0 0 4px #ffb347;
}

/* 页脚 */
.footer-meizu {
    text-align: center;
    margin-top: 60px;
    padding: 22px;
    font-size: 0.8rem;
    background: rgba(1, 20, 32, 0.7);
    backdrop-filter: blur(5px);
    border-radius: 32px;
    color: #9dcfec;
}
.footer-meizu a {
    color: #f9b84a;
    text-decoration: none;
}

/* 手机端 一排2个 */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }
    .group-title {
        font-size: 1.2rem;
        padding: 4px 16px;
    }
    .keyword-link {
        font-size: 0.8rem;
        padding: 3px 10px;
    }
    .keyword-desc {
        font-size: 0.6rem;
        margin-top: 6px;
    }
    .play-icon {
        width: 42px;
        height: 42px;
    }
    .play-icon::after {
        border-width: 8px 0 8px 15px;
    }
    .keyword-neon {
        font-size: 0.7rem;
        padding: 12px;
    }
    .meizu-btn {
        font-size: 1rem;
        padding: 10px 20px;
    }
}