:root {
    --bg: #f6f1e8;
    --paper: #fffaf3;
    --ink: #1c1915;
    --muted: #5c564c;
    --line: #ddd4c4;
    --accent: #b42318;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--bg);
    font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
}

a {
    color: inherit;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.92em;
    background: #efe7d8;
    padding: 0.1em 0.35em;
    border-radius: 4px;
}

.inner,
.hero,
.block {
    width: min(720px, calc(100% - 40px));
    margin-left: auto;
    margin-right: auto;
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: var(--paper);
}

.site-header .inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.12em;
}

nav {
    display: flex;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: var(--muted);
    font-size: 14px;
}

nav a:hover {
    color: var(--ink);
}

.hero {
    padding: 72px 0 24px;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--accent);
    font-size: 13px;
    letter-spacing: 0.08em;
}

h1 {
    margin: 0 0 20px;
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.25;
    font-weight: 650;
}

.nowrap {
    white-space: nowrap;
}

.lede {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
}

.block {
    padding: 36px 0;
}

.block h2 {
    margin: 0 0 16px;
    font-size: 20px;
}

.block p {
    margin: 0 0 16px;
    color: var(--muted);
}

.stack {
    list-style: none;
    margin: 0;
    padding: 0;
    border: 1px solid var(--line);
    background: var(--paper);
}

.stack li {
    display: flex;
    gap: 16px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--line);
}

.stack li:last-child {
    border-bottom: 0;
}

.stack span {
    width: 64px;
    color: var(--muted);
    flex-shrink: 0;
}

.note {
    padding: 20px 0;
    border-top: 1px solid var(--line);
}

.note h3 {
    margin: 0 0 8px;
    font-size: 16px;
}

.note p {
    margin: 0;
}

.site-footer {
    margin-top: 48px;
    border-top: 1px solid var(--line);
    background: var(--paper);
}

.site-footer .inner {
    padding: 28px 0 36px;
    text-align: center;
}

.site-footer p {
    margin: 0 0 8px;
    color: var(--muted);
    font-size: 13px;
}

.site-footer a {
    color: var(--muted);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.site-footer a:hover {
    color: var(--ink);
}

@media (max-width: 640px) {
    .hero {
        padding-top: 48px;
    }

    .stack li {
        flex-direction: column;
        gap: 4px;
    }
}