:root {
    --brand: #007db8;
    --brand-dark: #005b87;
    --ink: #0f172a;
    --muted: #475569;
    --bg: #f8fafc;
    --card: #ffffff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0
}

body {
    font-family: Segoe UI,Roboto,Helvetica,Arial,sans-serif;
    background: var(--bg);
    color: var(--ink)
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px
}

.header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 0
}

    .header img {
        height: 44px
    }

.tag {
    background: var(--brand);
    color: #fff;
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 12px
}

.hero {
    background: linear-gradient(180deg,#e6f4fb,#fff 70%);
    padding: 32px 24px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    margin-bottom: 24px
}

    .hero h1 {
        font-size: 30px;
        margin-bottom: 8px
    }

    .hero p {
        color: var(--muted)
    }

.link-btn {
    display: inline-block;
    background: var(--brand);
    color: #fff;
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 8px;
    margin-right: 10px
}

    .link-btn:hover {
        background: var(--brand-dark)
    }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
    gap: 16px;
    margin-top: 22px
}

.card {
    background: var(--card);
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between
}

    .card h3 {
        margin-bottom: 10px
    }

.list {
    padding-left: 18px;
    margin-top: 8px
}

.code {
    background: #0b1020;
    color: #e5e7eb;
    border-radius: 8px;
    padding: 14px;
    font-family: monospace;
    font-size: 13px;
    white-space: pre;
    overflow: auto;
    margin-top: 8px
}

.note {
    font-size: 13px;
    color: var(--muted);
    margin-top: 8px
}

.footer {
    margin: 28px 0 12px;
    color: var(--muted);
    font-size: 12px
}

.arch {
    display: block;
    width: 100%;
    max-width: 980px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #fff;
    margin-top: 16px
}

hr {
    border: none;
    border-top: 1px solid #e2e8f0;
    margin: 24px 0
}

.small {
    font-size: 12px;
    margin-top: 8px
}

.small a {
    color: inherit;
    text-decoration: underline;
}

section h2 {
    margin-bottom: 12px
}