/* ---------- 设计变量 ---------- */
:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-2: #fafbfc;
  --text: #1f2328;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --accent-text: #ffffff;
  --code-bg: #f6f8fa;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
  --radius: 14px;
}

[data-theme="dark"] {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1c2029;
  --text: #e6e8eb;
  --muted: #98a2b3;
  --border: #272c38;
  --accent: #8b8cf7;
  --accent-soft: #232a44;
  --accent-text: #10121a;
  --code-bg: #12151b;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: min(1280px, 100% - 48px); margin: 0 auto; }
main.container { flex: 1 0 auto; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 18px; height: 62px; }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px; color: var(--text); letter-spacing: .2px;
}
.brand:hover { text-decoration: none; }
.brand .dot {
  width: 26px; height: 26px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, var(--accent), #22d3ee);
  display: grid; place-items: center; color: #fff; font-size: 13px; font-weight: 800;
}
.nav-links { display: flex; gap: 4px; margin-left: 8px; }
.nav-links a {
  padding: 6px 12px; border-radius: 8px; color: var(--muted); font-size: 15.5px;
}
.nav-links a:hover { color: var(--text); background: var(--panel-2); text-decoration: none; }
.nav-links a.active { color: var(--accent); background: var(--accent-soft); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.search-form { display: flex; }
.search-form input {
  width: 190px; padding: 7px 12px; font-size: 15px;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--panel-2); color: var(--text); outline: none;
}
.search-form input:focus { border-color: var(--accent); background: var(--panel); }

.icon-btn {
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  width: 34px; height: 34px; border-radius: 10px; cursor: pointer; font-size: 15px;
  display: grid; place-items: center;
}
.icon-btn:hover { border-color: var(--accent); }

.btn {
  display: inline-block; padding: 8px 16px; border-radius: 10px;
  background: var(--accent); color: var(--accent-text); font-size: 14px;
  border: 1px solid transparent; cursor: pointer; font-weight: 500;
}
.btn:hover { opacity: .9; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.danger { background: #dc2626; color: #fff; }
.btn.small { padding: 5px 11px; font-size: 13px; }

/* ---------- Hero ---------- */
.hero {
  margin: 28px 0 22px; padding: 34px 32px; border-radius: 18px;
  background: linear-gradient(135deg, var(--accent-soft), var(--panel));
  border: 1px solid var(--border);
}
.hero h1 { margin: 0 0 8px; font-size: 30px; letter-spacing: .3px; }
.hero p { margin: 0; color: var(--muted); font-size: 16px; }

/* ---------- 布局 ---------- */
.layout { display: grid; grid-template-columns: 1fr 320px; gap: 28px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.panel + .panel { margin-top: 20px; }
.panel h3 { margin: 0 0 14px; font-size: 15.5px; letter-spacing: .5px; }
.panel h3 .en { color: var(--muted); font-weight: 400; font-size: 12px; margin-left: 6px; }

/* ---------- 文章卡片 ---------- */
.post-list { display: flex; flex-direction: column; gap: 16px; }
.post-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px; transition: transform .16s ease, box-shadow .16s ease, border-color .16s;
}
.post-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); text-decoration: none; }
.post-card .cover {
  width: 100%; max-height: 220px; object-fit: cover; border-radius: 10px; margin-bottom: 14px;
}
.post-card h2 { margin: 0 0 8px; font-size: 20px; line-height: 1.45; color: var(--text); }
.post-card .summary { margin: 0 0 12px; color: var(--muted); font-size: 16px; }
.meta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; color: var(--muted); font-size: 14.5px; }
.meta .pin { color: var(--accent); font-weight: 600; }

.tag-chip {
  display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12.5px;
  background: var(--accent-soft); color: var(--accent); border: 1px solid transparent;
}
.tag-chip:hover { text-decoration: none; border-color: var(--accent); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a { font-size: 13px; }
.tag-cloud a .n { color: var(--muted); font-size: 11.5px; margin-left: 3px; }

/* ---------- 分页 ---------- */
.pager { display: flex; justify-content: center; align-items: center; gap: 12px; margin: 30px 0 10px; }
.pager .info { color: var(--muted); font-size: 14px; }

/* ---------- 文章详情 ---------- */
.article { max-width: 920px; margin: 0 auto; }
.article-head { padding: 34px 0 18px; border-bottom: 1px solid var(--border); margin-bottom: 26px; }
.article-head h1 { margin: 0 0 12px; font-size: 32px; line-height: 1.35; }
.article-cover { width: 100%; border-radius: 12px; margin-bottom: 22px; }
.article-body { font-size: 18px; }
.article-body img { max-width: 100%; border-radius: 10px; }
.article-foot { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--border); }
.neighbour { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 14px; }

/* Markdown 排版 */
.markdown h1, .markdown h2, .markdown h3, .markdown h4 { line-height: 1.4; margin-top: 1.8em; }
.markdown h2 { font-size: 24px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.markdown h3 { font-size: 19px; }
.markdown p { margin: 1em 0; }
.markdown ul, .markdown ol { padding-left: 1.4em; }
.markdown blockquote {
  margin: 1.2em 0; padding: 10px 16px; border-left: 3px solid var(--accent);
  background: var(--panel-2); color: var(--muted); border-radius: 0 8px 8px 0;
}
.markdown blockquote p { margin: .4em 0; }
.markdown hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }
.markdown table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 15.5px; }
.markdown th, .markdown td { border: 1px solid var(--border); padding: 8px 12px; }
.markdown th { background: var(--panel-2); }
.markdown code {
  background: var(--code-bg); padding: 2px 6px; border-radius: 6px;
  font-size: 14px; font-family: "JetBrains Mono", "SFMono-Regular", Consolas, Menlo, monospace;
}
.markdown .code-block {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; overflow-x: auto; margin: 1.3em 0; line-height: 1.6;
}
.markdown .code-block code { background: none; padding: 0; font-size: 14px; }
.h-anchor { color: var(--muted); margin-right: 8px; opacity: 0; font-weight: 400; }
.markdown h1:hover .h-anchor, .markdown h2:hover .h-anchor,
.markdown h3:hover .h-anchor, .markdown h4:hover .h-anchor { opacity: 1; text-decoration: none; }

/* 代码高亮配色（浅色/深色） */
.hljs-comment, .hljs-quote { color: #8b949e; font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-literal { color: #d73a49; }
.hljs-string, .hljs-meta-string, .hljs-regexp { color: #0a7d33; }
.hljs-number, .hljs-variable, .hljs-template-variable { color: #b4520a; }
.hljs-title, .hljs-title.function_, .hljs-section { color: #6f42c1; font-weight: 600; }
.hljs-type, .hljs-built_in, .hljs-class .hljs-title { color: #005cc5; }
.hljs-attr, .hljs-attribute, .hljs-property { color: #0550ae; }
.hljs-symbol, .hljs-bullet, .hljs-link { color: #032f62; }
.hljs-deletion { color: #b31d28; }
.hljs-addition { color: #22863a; }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: 700; }
[data-theme="dark"] .hljs-keyword, [data-theme="dark"] .hljs-selector-tag,
[data-theme="dark"] .hljs-literal { color: #ff7b72; }
[data-theme="dark"] .hljs-string, [data-theme="dark"] .hljs-regexp { color: #a5d6ff; }
[data-theme="dark"] .hljs-number, [data-theme="dark"] .hljs-variable { color: #ffa657; }
[data-theme="dark"] .hljs-title, [data-theme="dark"] .hljs-section { color: #d2a8ff; }
[data-theme="dark"] .hljs-type, [data-theme="dark"] .hljs-built_in { color: #79c0ff; }
[data-theme="dark"] .hljs-attr, [data-theme="dark"] .hljs-attribute { color: #7ee787; }
[data-theme="dark"] .hljs-comment, [data-theme="dark"] .hljs-quote { color: #7d8590; }

/* ---------- 侧栏 ---------- */
.mini-list { list-style: none; padding: 0; margin: 0; }
.mini-list li { padding: 9px 0; border-bottom: 1px dashed var(--border); font-size: 15px; }
.mini-list li:last-child { border-bottom: none; }
.mini-list a { color: var(--text); }
.mini-list a:hover { color: var(--accent); }
.mini-list .date { color: var(--muted); font-size: 13.5px; display: block; }

/* ---------- 表单 ---------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--muted); }
input[type=text], input[type=password], input[type=number], textarea, select {
  width: 100%; padding: 10px 12px; font-size: 15px; font-family: inherit;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel-2); color: var(--text); outline: none;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); background: var(--panel); }
textarea { resize: vertical; min-height: 120px; }
textarea.md-editor { min-height: 460px; font-family: "JetBrains Mono", "SFMono-Regular", Consolas, Menlo, monospace; font-size: 14px; line-height: 1.7; }
.hint { color: var(--muted); font-size: 13px; margin-top: 6px; }
.error-box {
  background: #fee2e2; color: #991b1b; border: 1px solid #fecaca;
  padding: 10px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 16px;
}
.ok-box { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; padding: 10px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 16px; }

/* ---------- 登录 ---------- */
.login-wrap { max-width: 380px; margin: 70px auto; }

/* ---------- 后台 ---------- */
.admin-wrap { display: grid; grid-template-columns: 200px 1fr; gap: 24px; margin: 26px auto; align-items: start; }
@media (max-width: 860px) { .admin-wrap { grid-template-columns: 1fr; } }
.admin-nav { position: sticky; top: 80px; }
.admin-nav a {
  display: block; padding: 9px 14px; border-radius: 10px; color: var(--muted); font-size: 14.5px; margin-bottom: 4px;
}
.admin-nav a:hover { background: var(--panel-2); color: var(--text); text-decoration: none; }
.admin-nav a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

table.data { width: 100%; border-collapse: collapse; font-size: 14.5px; }
table.data th, table.data td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; }
table.data th { color: var(--muted); font-weight: 500; font-size: 13px; }
table.data tr:hover td { background: var(--panel-2); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 6px; font-size: 12px; background: var(--accent-soft); color: var(--accent); }
.badge.gray { background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); }

.asset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.asset-card { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--panel-2); }
.asset-card img { width: 100%; height: 110px; object-fit: cover; display: block; background: #eee; }
.asset-card .body { padding: 10px; font-size: 12.5px; }
.asset-card .name { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.asset-card .ops { display: flex; gap: 6px; margin-top: 8px; align-items: center; }

.editor-grid { display: grid; grid-template-columns: 1fr 340px; gap: 18px; align-items: start; }
@media (max-width: 1000px) { .editor-grid { grid-template-columns: 1fr; } }
.editor-tabs { display: flex; gap: 8px; margin-bottom: 10px; }
.editor-tabs button { font-size: 13px; }
.preview-box { min-height: 460px; overflow: auto; border: 1px solid var(--border); border-radius: 10px; padding: 16px; background: var(--panel-2); }
.drop-hint { border: 2px dashed var(--border); border-radius: 12px; padding: 18px; text-align: center; color: var(--muted); font-size: 14px; }
.drop-hint.over { border-color: var(--accent); background: var(--accent-soft); }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 60px; padding: 30px 0;   border-top: 1px solid var(--border);
  color: var(--muted); font-size: 15px;
}
.site-footer .inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.empty { text-align: center; padding: 60px 20px; color: var(--muted); }

/* ---------- 首页 hero 加强 ---------- */
.home-hero { text-align: center; }
.home-hero .hero-eyebrow {
  margin: 0 0 10px; color: var(--accent); font-size: 14px; letter-spacing: 2px; font-weight: 600;
}
.home-hero h1 { font-size: 30px; }
.home-hero .hero-sub { margin-top: 10px; font-size: 15px; letter-spacing: 1px; }

/* 欢迎语 */
.welcome p { margin: 0 0 14px; }
.welcome p:last-child { margin-bottom: 0; }
.welcome-quote {
  margin-top: 18px !important; padding: 14px 18px; border-left: 3px solid var(--accent);
  background: var(--panel-2); border-radius: 0 10px 10px 0; color: var(--text); line-height: 1.9;
}

/* 栏目导览 */
.section-title { font-size: 20px; margin: 34px 0 16px; letter-spacing: .5px; }
.columns { margin-top: 30px; }
.column-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 760px) { .column-grid { grid-template-columns: 1fr; } }
.column-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 22px 18px; transition: transform .16s ease, box-shadow .16s ease, border-color .16s;
}
.column-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.column-card h3 { margin: 0 0 10px; font-size: 19px; color: var(--accent); }
.column-intro { margin: 0 0 14px; color: var(--muted); font-size: 15.5px; }
.column-examples { margin: 0 0 14px; padding-left: 1.2em; }
.column-examples li { margin: 6px 0; font-size: 15.5px; }
.column-more { font-size: 14px; font-weight: 500; }

/* 侧栏栏目导航 */
.section-nav { list-style: none; padding: 0; margin: 0; }
.section-nav li { margin: 0; }
.section-nav li.sep { height: 1px; background: var(--border); margin: 8px 0; }
.section-nav a {
  display: block; padding: 8px 10px; border-radius: 8px; color: var(--text); font-size: 15.5px;
}
.section-nav a:hover { background: var(--panel-2); color: var(--accent); text-decoration: none; }

/* 页脚说明 */
.foot-left { display: flex; flex-direction: column; gap: 4px; }
.foot-copy { font-weight: 500; color: var(--text); }
.foot-note { font-size: 14px; }
.foot-police a {
  display: inline-flex; align-items: center; gap: 5px;
  color: inherit; text-decoration: none;
}
.foot-police a:hover { color: var(--text); }
.foot-police img { display: block; }
.foot-right { text-align: right; }
@media (max-width: 600px) { .site-footer .inner { flex-direction: column; } .foot-right { text-align: left; } }