/* ===== 移动设备 (默认样式, <768px) ===== */

main {
    padding: 40px 20px;
}
main .container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

h2 {
    font-size: 22px;
    color: var(--title-text-color);
    margin-bottom: 20px;
    font-weight: bold;
}
h5 {
    font-weight: normal;
    color: var(--desc-text-color);
    margin-bottom: 30px;
}
p {
    font-size: 16px;
    line-height: 32px;
    color: var(--content-text-color);
    margin-bottom: 20px;
}
p:last-child {
    margin-bottom: 0;
}

/* ===== 平板设备 (≥768px) ===== */
@media (min-width: 768px) {
    main {
        padding: 70px 40px 40px 40px;
    }

    h2 {
        font-size: 32px;
        margin-bottom: 24px;
    }
    h5 {
        margin-bottom: 50px;
    }
    p {
        font-size: 24px;
        line-height: 42px;
        margin-bottom: 24px;
    }
}

/* ===== 电脑设备 (1280px) ===== */
@media (min-width: 1280px) {
    h2 {
        font-size: 40px;
        margin-bottom: 32px;
    }
    p {
        font-size: 28px;
        line-height: 50px;
        margin-bottom: 32px;
    }
}