/* ===========================
    頁首設計
    =========================== */
.site-header {
    background: linear-gradient(135deg, #AFB7CA 0%, #9FA9BF 100%);
    color: white;
    padding: 100px 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

    .site-header::before {
        content: '';
        position: absolute;
        top: -80%;
        right: -10%;
        width: 450px;
        height: 450px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
    }

    .site-header::after {
        content: '';
        position: absolute;
        bottom: -40%;
        left: -10%;
        width: 500px;
        height: 500px;
        background: rgba(255, 255, 255, 0.12);
        border-radius: 50%;
    }

.header-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.site-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.site-header .subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    font-weight: 300;
}