:root {
    color-scheme: light;
    --bg: #f6f4ef;
    --paper: #ffffff;
    --ink: #1f2328;
    --muted: #687076;
    --line: #ded8ce;
    --accent: #b4232a;
    --accent-dark: #841b20;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background: var(--bg);
}

.guide-shell {
    width: min(920px, calc(100% - 32px));
    margin: 0 auto;
    padding: 48px 0 64px;
}

.guide-hero {
    padding: 36px 0 28px;
    border-bottom: 1px solid var(--line);
}

.brand-row {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent-dark);
    font-size: 15px;
    font-weight: 700;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
}

h1 {
    margin: 24px 0 12px;
    font-size: clamp(34px, 6vw, 56px);
    line-height: 1.05;
    letter-spacing: 0;
}

.guide-hero p {
    max-width: 760px;
    margin: 0;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.hero-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 16px;
    border-radius: 6px;
    border: 1px solid var(--line);
    color: var(--ink);
    background: var(--paper);
    text-decoration: none;
    font-weight: 650;
}

.hero-actions a:first-child {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.hero-actions a.buy-link {
    border-color: #d6b46a;
    background: #fff7db;
    color: #5f4510;
}

.guide-card {
    margin-top: 18px;
    padding: 24px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.guide-card h2 {
    margin: 0 0 12px;
    font-size: 20px;
    letter-spacing: 0;
}

.guide-card p,
.guide-card li {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
}

.guide-card p {
    margin: 0 0 10px;
}

.guide-card p:last-child {
    margin-bottom: 0;
}

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

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 14px 0;
}

.pricing-grid div {
    padding: 14px;
    border: 1px solid #eadfcf;
    border-radius: 8px;
    background: #fbfaf7;
}

.pricing-grid strong,
.pricing-grid span {
    display: block;
}

.pricing-grid strong {
    color: var(--ink);
    font-size: 18px;
    margin-bottom: 4px;
}

.pricing-grid span {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.5;
}

.purchase-card {
    display: block;
    margin: 14px 0;
    padding: 14px 16px;
    border: 1px solid #e3c27c;
    border-radius: 8px;
    background: #fff8df;
    color: #573f0c;
    text-decoration: none;
}

.purchase-card span,
.purchase-card strong {
    display: block;
}

.purchase-card span {
    font-size: 13px;
    margin-bottom: 4px;
}

.purchase-card strong {
    color: #2f250f;
    font-size: 16px;
}

.purchase-note {
    margin-top: -6px;
    color: #8a7b62;
    font-size: 11px;
    line-height: 1.45;
}

.example-list {
    display: grid;
    gap: 8px;
    margin-top: 14px;
}

.example-list div {
    padding: 10px 12px;
    border-radius: 6px;
    background: #f7f6f3;
    border: 1px solid #ebe5dc;
    color: #33383d;
    font-size: 14px;
}

.warning {
    border-color: #e8c5b8;
    background: #fff8f4;
}

@media (max-width: 640px) {
    .guide-shell {
        width: min(100% - 24px, 920px);
        padding-top: 28px;
    }

    .guide-card {
        padding: 18px;
    }

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