#main_bg {
    background-image: url(../assets/images/background/index_bg.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    position: fixed;
    min-height: 100vh;
    width: 100%;
    background-attachment: fixed;
    z-index: -1;
}

/* ...existing code... */
#welcome_title{
    position: fixed;
    left: 220px;
    top: 0;
    width: calc(100% - 220px);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 24px;
    box-sizing: border-box;
    z-index: 50;

    /* glassy gradient text */
    color: transparent;
    background: rgba(255,255,255,0.8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;

    font-size: 64px;
    font-weight: 800;
    letter-spacing: 0.02em;

    -webkit-text-stroke: 0.6px rgba(255,255,255,0.22);

    filter: drop-shadow(0 10px 30px rgba(0,0,0,0.25));
}

/* subtle glossy highlight over the text area */
#welcome_title::after{
    content: "";
    position: absolute;
    left: 50%;
    top: 48%;
    transform: translate(-50%,-50%) skewY(-6deg);
    width: min(72%, 920px);
    height: 46%;
    background: linear-gradient(180deg, rgba(177, 201, 255, 0.28), rgba(255, 155, 155, 0.23));
    mix-blend-mode: overlay;
    pointer-events: none;
    z-index: 49;
}
/* ...existing code... */