:root {
    color-scheme: light dark;
    --background: #f4f7fb;
    --surface: #ffffff;
    --text: #172033;
    --secondary-text: #566176;
    --accent: #1769aa;
    --border: #dfe5ee;
    --notice-background: #eef6ff;
    --notice-border: #7db5e8;
    --shadow: 0 16px 42px rgba(30, 56, 88, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC",
        "PingFang TC", "Microsoft JhengHei", sans-serif;
    font-size: 17px;
    line-height: 1.75;
}

a {
    color: var(--accent);
    overflow-wrap: anywhere;
}

a:hover {
    text-decoration-thickness: 2px;
}

.site-header {
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.94);
}

.header-content,
.page-content,
.site-footer {
    width: min(100% - 32px, 880px);
    margin-inline: auto;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    gap: 24px;
}

.brand {
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 700;
    text-decoration: none;
}

.page-switcher {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 18px;
    font-size: 0.92rem;
}

.page-switcher a[aria-current="page"] {
    color: var(--text);
    font-weight: 650;
    text-decoration: none;
}

.page-content {
    margin-block: 40px;
    padding: clamp(28px, 6vw, 64px);
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    line-height: 1.35;
}

h1 {
    margin: 0;
    font-size: clamp(2rem, 7vw, 3.2rem);
    letter-spacing: -0.03em;
}

h2 {
    margin: 2.4em 0 0.65em;
    padding-top: 0.25em;
    font-size: 1.35rem;
}

h3 {
    margin: 1.6em 0 0.4em;
    font-size: 1.05rem;
}

p,
ul {
    margin-block: 0.7em;
}

ul {
    padding-left: 1.4em;
}

li + li {
    margin-top: 0.45em;
}

.effective-date {
    margin: 10px 0 30px;
    color: var(--secondary-text);
}

.notice {
    margin: 26px 0;
    padding: 18px 20px;
    border-left: 4px solid var(--notice-border);
    border-radius: 8px;
    background: var(--notice-background);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-block: 1.5em;
}

.feature-card {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--background);
}

.feature-card h2 {
    margin: 0 0 0.45em;
    padding: 0;
    font-size: 1.12rem;
}

.feature-card p {
    margin: 0;
    color: var(--secondary-text);
}

.legal-table {
    width: 100%;
    margin-block: 1.2em;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.legal-table th,
.legal-table td {
    padding: 12px;
    border: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.legal-table th {
    background: var(--background);
    font-weight: 650;
}

.site-footer {
    padding: 0 0 40px;
    color: var(--secondary-text);
    font-size: 0.88rem;
    text-align: center;
}

@media (max-width: 600px) {
    body {
        font-size: 16px;
    }

    .header-content {
        align-items: flex-start;
        flex-direction: column;
        padding-block: 14px;
        gap: 6px;
    }

    .page-switcher {
        width: 100%;
        justify-content: flex-start;
        gap: 10px 18px;
    }

    .page-content {
        width: 100%;
        margin-block: 0;
        border-width: 0 0 1px;
        border-radius: 0;
        box-shadow: none;
    }

    .legal-table,
    .legal-table tbody,
    .legal-table tr,
    .legal-table th,
    .legal-table td {
        display: block;
        width: 100%;
    }

    .legal-table tr + tr {
        margin-top: 14px;
    }

    .legal-table th {
        border-bottom: 0;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: #0f1420;
        --surface: #171e2d;
        --text: #edf2fa;
        --secondary-text: #aeb8ca;
        --accent: #72b7f0;
        --border: #30394b;
        --notice-background: #172b40;
        --notice-border: #559bd4;
        --shadow: none;
    }

    .site-header {
        background: rgba(23, 30, 45, 0.95);
    }
}