body.prep-page {
    --prep-hero-start: #2b5876;
    --prep-hero-end: #4e4376;
    --prep-highlight-bg: #eef4ff;
    --prep-hero-after-shadow: 0 20px 40px rgb(45 42 38 / 12%);

    max-width: 100%;
    padding: 0;
    margin: 0;
    background: var(--bg-color);
    color: var(--text-main);
    font-family: 'Noto Sans TC', var(--font-main);
    line-height: 1.7;
}

.prep-hero {
    background: linear-gradient(120deg, var(--prep-hero-start), var(--prep-hero-end));
    color: #fff;
    padding: 64px 24px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.prep-hero::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -28px;
    width: 64px;
    height: 64px;
    background: var(--bg-color);
    border-radius: 16px;
    transform: translateX(-50%) rotate(45deg);
    box-shadow: var(--prep-hero-after-shadow);
    z-index: 1;
}

.prep-hero h1 {
    margin: 0;
    font-size: clamp(2rem, 3vw + 1rem, 2.6rem);
    letter-spacing: 0.5px;
}

.tagline {
    margin-top: 12px;
    font-size: 1.1rem;
    color: #fff;
}

.prep-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 80px 24px 96px;
    position: relative;
    z-index: 2;
}

.card {
    background: var(--bg-card);
    border-radius: 18px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-lg);
}

.card h2 {
    color: var(--prep-hero-start);
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 1.4rem;
}

.card h3 {
    margin-top: 28px;
    margin-bottom: 12px;
    font-size: 1.15rem;
    color: var(--text-heading);
}

.card p {
    margin: 0 0 16px;
    color: var(--text-main);
}

.card ul {
    padding-left: 22px;
    margin: 0 0 20px;
}

.card li {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.highlight {
    background: var(--prep-highlight-bg);
    border-left: 4px solid var(--prep-hero-end);
    padding: 14px 16px;
    border-radius: 10px;
    margin: 20px 0;
}

.plan-list {
    margin: 0 0 20px;
}

.plan-item {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 8px 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-secondary);
}

.plan-item:last-of-type {
    border-bottom: none;
}

.plan-item dt {
    font-weight: 700;
    color: var(--text-heading);
}

.plan-item dd {
    margin: 0;
    color: var(--text-secondary);
}

.footnote {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

@media (width <= 640px) {
    .prep-hero {
        padding: 48px 18px 32px;
    }

    .prep-hero h1 {
        font-size: 2rem;
    }

    .prep-container {
        padding: 70px 18px 80px;
    }

    .plan-item {
        grid-template-columns: 1fr;
    }
}