/* 让容器看起来像漂浮的碎冰 */
.main-wrapper {
    max-width: 900px;
    margin: 80px auto;
    padding: 20px;
}

.header-banner {
    text-align: center;
    padding: 60px 0;
    position: relative;
}

.header-banner h1 {
    font-size: 3rem;
    letter-spacing: 4px;
    background: linear-gradient(120deg, var(--ice-crystal), var(--ice-deep));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(2px 2px 4px var(--shadow));
}