body {
    background-color: rgb(246, 251, 251);
}

.hero-banner {
    position: relative;
    width: 100%;
    aspect-ratio: 9/2;
    max-height: 350px;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('你的图片路径');
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.hero-content {
    text-align: center;
    color: white;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    letter-spacing: 3px;
    opacity: 0.9;
    text-transform: uppercase;
}
.main-container {
    padding: 20px 8%;
}
.files-item:nth-child(odd) { 
    background-color: white;
}
.files-item:nth-child(even) { 
    background-color: #ddd;
}
.files-item,
.files-top {
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 8px 0;
}
.files-top {
    background-color: #36f;
    color: white;
}

.files-item *,
.files-top * {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-align: center;
    font-size: 25px;
    margin: 0;
}

.files-download img {
    height: 25px;
    width: auto;
}

@media (max-width: 768px) {
    .main-container {
        padding: 16px 5%;
    }

    .files-item,
    .files-top {
        gap: 20;
    }

    .files-item *,
    .files-top * {
        font-size: 20px;
    }

    .files-download img {
        height: 20px;
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: 10px 2%;
    }
    .files-item,
    .files-top {
        gap: 0;
    }

    .files-item *,
    .files-top * {
        font-size: 16px;
    }

    .files-download img {
        height: 16px;
    }
}

@media (max-width: 300px) {
    .main-container {
        padding:0;
    }
    .files-item,
    .files-top {
        gap: 0;
    }

    .files-item *,
    .files-top * {
        font-size: 13px;
    }

    .files-download img {
        height: 13px;
    }
}