body {
    background: #b2dfdf;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.music-player {
    background: rgba(25, 25, 35, 0.4);
    backdrop-filter: blur(8px);
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    padding: 28px 32px 28px 0;
    min-width: 400px;
    min-height: 150px;
    max-width: 440px;
}
.cover {
    width: 90px;
    height: 90px;
    background: rgba(25, 25, 35, 0.4);
    backdrop-filter: blur(8px);
    border-radius: 14px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.09);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 24px;
    position: relative;
    top: -18px;
    left: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.cover img {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    object-fit: cover;
}
.player-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.song-info {
    margin-bottom: 9px;
}
.song-title {
    font-weight: bold;
    color: rgba(0, 0, 0, 0.8);
    font-size: 1.13em;
}
.song-artist {
    color: #90a4ae;
    font-size: 0.95em;
}
.progress-container {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}
.progress-bar {
    flex: 1;
    height: 5px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 2.5px;
    margin: 0 8px;
    position: relative;
    overflow: hidden;
}
.progress {
    height: 100%;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(8px);
    border-radius: 2.5px;
    width: 0%;
    transition: width 0.2s;
}
.time {
    font-size: 0.85em;
    color: #90a4ae;
}
.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 22px;
}
.control-btn {
    background: none;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    outline: none;
    cursor: pointer;
    font-size: 1.5em;
    color: rgba(25, 25, 35, 0.8);
    transition: all 0.2s;
    border-radius: 9px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.control-btn:active, .control-btn.selected {
    background: rgba(25, 25, 35, 0.2);
}
.bg-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: -1;
    min-width: 100%;
    min-height: 100%;
    pointer-events: none;
}
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}
.nav-container {
    display: flex;
    gap: 20px;
}
.nav-row {
    display: flex;
    gap: 20px;
}
.nav-bar-full {
    box-sizing: border-box;
    width: 100%;
    text-align: center;
}
.nav-bar {
    background: rgba(25, 25, 35, 0.4);
    backdrop-filter: blur(8px);
    border-radius: 20px;
    padding: 15px 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.nav-bar:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}
.nav-item {
    color: rgba(0, 0, 0, 0.8);
    font-size: 1.1em;
    cursor: pointer;
    padding: 5px 15px;
    border-radius: 10px;
    transition: color 0.2s;
    text-decoration: none;
    display: inline-block;
}
.nav-item:hover {
    color: rgba(0, 0, 0, 1);
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .music-player {
        min-width: 320px;
        padding: 20px 24px 20px 0;
    }

    .cover {
        width: 80px;
        height: 80px;
        margin-right: 20px;
    }

    .cover img {
        width: 60px;
        height: 60px;
    }

    .song-title {
        font-size: 1em;
    }

    .song-artist {
        font-size: 0.9em;
    }

    .nav-container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-bar {
        padding: 12px 25px;
    }
}

@media screen and (max-width: 480px) {
    .music-player {
        min-width: 280px;
        padding: 15px 20px 15px 0;
    }

    .cover {
        width: 70px;
        height: 70px;
        margin-right: 15px;
        top: -12px;
        left: 8px;
    }

    .cover img {
        width: 50px;
        height: 50px;
    }

    .song-title {
        font-size: 0.9em;
    }

    .song-artist {
        font-size: 0.8em;
    }

    .control-btn {
        width: 35px;
        height: 35px;
        font-size: 1.3em;
    }

    .nav-bar {
        padding: 10px 20px;
    }

    .nav-item {
        font-size: 1em;
        padding: 4px 12px;
    }
}