:root {
	--fg: #1f2328;
	--muted: #6b7178;
	--accent: #17806f;
	--accent-2: #7357c2;
	--bg: #f7f7f3;
	--surface: #ffffff;
	--line: #e4e4dd;
	--code-bg: #f1f1ec;
	--glow-1: rgba(52, 211, 153, .20);
	--glow-2: rgba(139, 92, 246, .14);
	--glow-3: rgba(34, 211, 238, .12);
	--shadow: 0 1px 2px rgba(31, 35, 40, .04), 0 6px 20px rgba(31, 35, 40, .05);
	--aurora: linear-gradient(135deg, #34d399, #22d3ee 50%, #a78bfa);
	color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
	:root {
		--fg: #e4e5e2;
		--muted: #969ca3;
		--accent: #5ccfb7;
		--accent-2: #b39cf6;
		--bg: #111316;
		--surface: #181b1f;
		--line: #2a2e34;
		--code-bg: #1e2227;
		--glow-1: rgba(52, 211, 153, .13);
		--glow-2: rgba(139, 92, 246, .14);
		--glow-3: rgba(34, 211, 238, .08);
		--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
	}
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
	position: relative;
	margin: 0;
	min-height: 100vh;
	display: flex;
	flex-direction: column;
	background: var(--bg);
	color: var(--fg);
	font: 17px/1.8 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
	-webkit-font-smoothing: antialiased;
}
/* 顶部极光光晕 */
body::before {
	content: "";
	position: absolute;
	inset: 0 0 auto;
	height: 460px;
	z-index: -1;
	pointer-events: none;
	background:
		radial-gradient(45% 70% at 12% 0%, var(--glow-1), transparent 70%),
		radial-gradient(40% 60% at 55% 0%, var(--glow-3), transparent 70%),
		radial-gradient(45% 70% at 92% 0%, var(--glow-2), transparent 70%);
}
::selection { background: rgba(52, 211, 153, .3); }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-2); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: 760px; margin: 0 auto; padding: 0 22px; }

/* 页头 */
header { padding: 40px 0 8px; }
header .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--fg); text-decoration: none; }
.brand::before {
	content: "";
	width: 34px;
	height: 34px;
	flex: none;
	border-radius: 11px;
	background: var(--aurora);
	box-shadow: 0 4px 14px rgba(52, 211, 153, .35);
}
.brand:hover { color: var(--fg); }
.brand-name { display: block; font-size: 1.3em; font-weight: 700; line-height: 1.2; letter-spacing: .02em; }
.brand-tag { display: block; color: var(--muted); font-size: .78em; line-height: 1.4; }
nav { display: flex; gap: 4px; }
nav a {
	padding: 5px 14px;
	border-radius: 999px;
	color: var(--muted);
	font-size: .95em;
	text-decoration: none;
	transition: color .2s, background .2s;
}
nav a:hover { color: var(--fg); background: var(--code-bg); }
nav a[aria-current="page"] { color: var(--fg); background: var(--surface); box-shadow: var(--shadow); }

main.wrap { flex: 1; padding-top: 44px; padding-bottom: 64px; }

/* 首页简介 */
.intro { margin: 8px 0 36px; }
.intro h1 { margin: 0 0 8px; font-size: 1.9em; line-height: 1.35; letter-spacing: .01em; }
.intro h1 span {
	background: var(--aurora);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}
.intro p { margin: 0; color: var(--muted); }
.section-title { margin: 0 0 14px; color: var(--muted); font-size: .85em; font-weight: 600; letter-spacing: .12em; }

/* 文章列表 */
.post-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.post-list li {
	position: relative;
	padding: 22px 24px;
	background: var(--surface);
	border: 1px solid var(--line);
	border-radius: 16px;
	box-shadow: var(--shadow);
	transition: transform .2s, border-color .2s;
}
.post-list li:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.post-list h2 { margin: 6px 0 6px; font-size: 1.22em; line-height: 1.45; }
.post-list h2 a { color: var(--fg); text-decoration: none; }
/* 整张卡片可点击 */
.post-list h2 a::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.post-list li:hover h2 a { color: var(--accent); }
.post-list p { margin: 0; color: var(--muted); font-size: .95em; line-height: 1.75; }

.meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: .86em; }
.tag {
	padding: 1px 10px;
	border-radius: 999px;
	color: var(--accent);
	background: color-mix(in srgb, var(--accent) 12%, transparent);
	font-size: .92em;
	font-weight: 500;
}

/* 正文 */
article { overflow-wrap: break-word; }
article h1 { margin: 0 0 12px; font-size: 2em; line-height: 1.35; letter-spacing: .01em; }
article > .meta { padding-bottom: 22px; margin-bottom: 28px; border-bottom: 1px solid var(--line); }
article h2 { position: relative; margin: 2em 0 .6em; padding-left: 14px; font-size: 1.32em; line-height: 1.45; }
article h2::before {
	content: "";
	position: absolute;
	left: 0;
	top: .28em;
	bottom: .28em;
	width: 4px;
	border-radius: 4px;
	background: var(--aurora);
}
article p { margin: 0 0 1.15em; }
article ul, article ol { padding-left: 1.4em; }
article li { margin: .5em 0; }
article li::marker { color: var(--accent); }
article strong { color: var(--fg); }
article code {
	padding: .12em .4em;
	border-radius: 5px;
	background: var(--code-bg);
	font: .88em/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
article pre {
	margin: 0 0 1.3em;
	padding: 16px 18px;
	background: var(--code-bg);
	border: 1px solid var(--line);
	border-radius: 12px;
	overflow-x: auto;
	font-size: .88em;
	line-height: 1.65;
	tab-size: 4;
}
article pre code { padding: 0; background: none; font-size: 1em; }
blockquote {
	margin: 0 0 1.2em;
	padding: 10px 16px;
	border-left: 3px solid var(--accent);
	border-radius: 0 10px 10px 0;
	background: var(--code-bg);
	color: var(--muted);
}
.back {
	display: inline-flex;
	margin-top: 28px;
	padding: 6px 16px;
	border: 1px solid var(--line);
	border-radius: 999px;
	color: var(--muted);
	font-size: .9em;
	text-decoration: none;
	transition: color .2s, border-color .2s;
}
.back:hover { color: var(--accent); border-color: var(--accent); }

/* 页脚 */
footer { padding: 24px 0 44px; color: var(--muted); font-size: .85em; }
footer .wrap { padding-top: 22px; background: linear-gradient(var(--line), var(--line)) 22px 0 / calc(100% - 44px) 1px no-repeat; }

@media (max-width: 560px) {
	body { font-size: 16px; }
	header { padding-top: 28px; }
	.intro h1, article h1 { font-size: 1.6em; }
	.post-list li { padding: 18px; }
}
@media (prefers-reduced-motion: reduce) {
	* { transition: none !important; }
}