:root {
	--bg: #f4f6f9;
	--card: #ffffff;
	--text: #1f2733;
	--muted: #5d6b7d;
	--line: #e2e7ee;
	--accent: #1f8fd6;
	--accent-2: #22c3a6;
	--tip-bg: #eaf7f3;
	--tip-line: #22c3a6;
	--code-bg: #eef1f5;
}
@media (prefers-color-scheme: dark) {
	:root {
		--bg: #15191f;
		--card: #1e242c;
		--text: #e3e8ef;
		--muted: #9aa7b8;
		--line: #2c343f;
		--accent: #5cb6f0;
		--tip-bg: #183029;
		--code-bg: #2a313b;
	}
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
	margin: 0;
	background: var(--bg);
	color: var(--text);
	font: 16px/1.75 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.inner { max-width: 880px; margin: 0 auto; padding: 0 16px; }

.top {
	background: linear-gradient(90deg, #1b9f8a, #2563eb);
	color: #fff;
}
.top .inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	height: 56px;
}
.top .brand {
	display: flex;
	align-items: center;
	gap: 8px;
	color: #fff;
	font-weight: 700;
	font-size: 18px;
}
.top .brand img { border-radius: 7px; background: #fff2; }
.top nav { display: flex; gap: 18px; }
.top nav a { color: #fff; opacity: .92; font-size: 15px; white-space: nowrap; }
.top nav a:hover { opacity: 1; }

main { padding-top: 18px; padding-bottom: 40px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.crumbs span { margin: 0 4px; }
h1 { font-size: 28px; line-height: 1.3; margin: 0 0 12px; }
h2 { font-size: 21px; margin: 32px 0 10px; }
h3 { font-size: 17px; margin: 24px 0 8px; }
.lead { color: var(--muted); margin-top: 0; }
.meta { color: var(--muted); font-size: 13px; margin-top: -4px; }

article {
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 12px;
	padding: 24px 28px 28px;
}
article li { margin: 4px 0; }
code {
	background: var(--code-bg);
	border-radius: 4px;
	padding: 1px 6px;
	font-size: .92em;
	font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.tip {
	background: var(--tip-bg);
	border-left: 4px solid var(--tip-line);
	border-radius: 6px;
	padding: 10px 14px;
	margin: 14px 0;
}
.cta { margin-top: 28px; }
.button {
	display: inline-block;
	background: linear-gradient(90deg, #1b9f8a, #2563eb);
	color: #fff;
	border-radius: 8px;
	padding: 9px 20px;
	font-weight: 600;
}
.button:hover { text-decoration: none; filter: brightness(1.08); }

.cards {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
	gap: 14px;
}
.card {
	display: block;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 12px;
	padding: 16px 18px;
	color: var(--text);
	transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.card h2 { font-size: 17px; margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

.pager {
	display: flex;
	justify-content: space-between;
	gap: 12px;
	margin-top: 16px;
	font-size: 14px;
}
.pager .next { margin-left: auto; text-align: right; }

.bottom {
	border-top: 1px solid var(--line);
	color: var(--muted);
	font-size: 13px;
	padding: 18px 0 28px;
	text-align: center;
}

@media (max-width: 600px) {
	.top nav { gap: 10px; }
	.top nav a { font-size: 13px; }
	.top .brand span { display: none; }
	h1 { font-size: 23px; }
	article { padding: 18px 16px 22px; border-radius: 10px; }
}

.top nav a.lang { border: 1px solid rgba(255,255,255,.6); border-radius: 999px; padding: 0 10px; }