:root {
  --bg: #ffffff;
  --surface: #f6f8fa;
  --border: #d8dee4;
  --text: #1f2328;
  --muted: #59636e;
  --accent: #0969da;
  --accent-dim: #0550ae;
  --tag-bg: #eaeef2;
  --danger: #cf222e;
  --ok: #1a7f37;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "SF Pro Text", system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

header.site {
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
}

header.site h1 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
  font-weight: 600;
}

header.site p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.lang-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  margin-bottom: 0.75rem;
}

.lang-toolbar .home-link {
  font-size: 0.88rem;
  color: var(--muted);
}

.lang-toolbar .lang-select {
  font: inherit;
  font-size: 0.88rem;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.55rem;
  background: var(--bg);
  min-width: 11rem;
  cursor: pointer;
}

.lang-toolbar .lang-select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.lang-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}

.lang-card {
  display: block;
  padding: 1.25rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-align: center;
  transition: border-color 0.15s, transform 0.12s;
}

.lang-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  text-decoration: none;
}

.lang-card .native {
  font-size: 1.15rem;
  font-weight: 600;
}

.lang-card .en {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.meta {
  font-size: 0.88rem;
  color: var(--muted);
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1rem;
}

.article-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.article-card .excerpt {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0 0 0.75rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  background: var(--tag-bg);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--muted);
}

.tag a {
  color: inherit;
}

.tag a:hover {
  color: var(--accent);
}

.pagination {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
}

.pagination .current {
  background: var(--surface);
  border-color: var(--accent);
  color: var(--accent);
}

.prose {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.4rem;
}

.prose h1,
.prose h2,
.prose h3 {
  margin-top: 1.25em;
  margin-bottom: 0.5em;
}

.prose pre {
  background: #f0f2f5;
  color: var(--text);
  padding: 0.85rem 1rem;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border);
}

.prose code {
  font-size: 0.9em;
}

.prose pre code {
  background: none;
  padding: 0;
}

.prose blockquote {
  margin: 1em 0;
  padding-left: 1rem;
  border-left: 3px solid var(--accent-dim);
  color: var(--muted);
}

/* 正文内图片：不超出容器，高度按比例缩放 */
.prose img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
  border-radius: 8px;
  margin: 0.75rem 0;
}

.prose figure {
  margin: 1em 0;
  max-width: 100%;
}

.prose figure img {
  margin: 0;
}

.comments {
  margin-top: 2rem;
}

.comments h2 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
}

.comment {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.65rem;
  background: var(--surface);
}

.comment .who {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

form.stacked label {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

form.stacked input[type="text"],
form.stacked input[type="password"],
form.stacked textarea,
form.stacked select {
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  font: inherit;
}

form.stacked textarea {
  min-height: 140px;
  resize: vertical;
}

form.stacked button,
.btn {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}

.btn.secondary {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn.danger {
  background: var(--danger);
}

.btn.small {
  margin-top: 0;
  padding: 0.25rem 0.55rem;
  font-size: 0.85rem;
}

.alert {
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.92rem;
}

.alert.ok {
  background: #dff6e8;
  border: 1px solid var(--ok);
  color: #0d3d1f;
}

.alert.err {
  background: #ffebe9;
  border: 1px solid var(--danger);
  color: #82071e;
}

.admin-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

table.admin {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

table.admin th,
table.admin td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

table.admin th {
  background: var(--surface);
  color: var(--muted);
  font-weight: 500;
}

.tag-checks label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-right: 0.75rem;
  margin-top: 0.35rem;
  color: var(--text);
}

.tag-checks .tag-group {
  margin-top: 0.25rem;
}

.inline-form {
  display: inline;
}