/* Semantic UI 风格（参考 oier.baoshuo.dev / OIerDb） */

:root {
  --text: rgba(0, 0, 0, 0.87);
  --muted: rgba(0, 0, 0, 0.6);
  --border: rgba(34, 36, 38, 0.15);
  --bg: #ffffff;
  --accent: #4183c4;
  --radius: 0.28571429rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-top: 50px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}

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

a:hover {
  text-decoration: underline;
}

/* ---------- menu ---------- */

.ui.borderless.top.fixed.menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 101;
  min-height: 2.85714286em;
  background: #fff;
  border: none;
  box-shadow: 0 2px 4px rgba(34, 36, 38, 0.08);
}

.ui.menu {
  display: flex;
  align-items: center;
}

.ui.menu .container {
  display: flex;
  align-items: center;
  width: 100%;
}

.ui.menu .item {
  display: inline-flex;
  align-items: center;
  padding: 0.92857143em 1.14285714em;
  color: rgba(0, 0, 0, 0.87);
  font-size: 14px;
  white-space: nowrap;
  cursor: pointer;
}

.ui.menu .item:hover {
  background: rgba(0, 0, 0, 0.05);
  text-decoration: none;
}

.ui.menu .item.active {
  background: rgba(0, 0, 0, 0.06);
  font-weight: 700;
  color: rgba(0, 0, 0, 0.95);
}

.ui.menu .logo img {
  width: 24px;
  height: 24px;
  margin-right: 0.75em;
}

.ui.menu .brand {
  font-size: 18px;
  font-weight: 700;
}

.ui.menu .right.menu {
  margin-left: auto;
  display: flex;
  align-items: center;
}

/* ---------- container / main ---------- */

.ui.container {
  max-width: 1127px;
  margin: 0 auto;
  width: auto;
}

.main {
  padding: 1.5rem 1.5rem 0.5rem;
}

section {
  scroll-margin-top: 76px;
}

/* ---------- header ---------- */

.ui.header {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.75em;
  line-height: 1.2;
}

.ui.header mark {
  background: rgba(65, 131, 196, 0.16);
  color: var(--accent);
  padding: 0 0.12em;
  border-radius: 2px;
}

.sub.header {
  font-size: 0.9375rem;
  color: var(--muted);
  font-weight: 400;
  margin: -0.25em 0 1em;
}

h2.ui.header {
  font-size: 1.71428571rem;
}

/* ---------- meta / actions ---------- */

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em 1.25em;
  margin: 0 0 1.25em;
  color: rgba(0, 0, 0, 0.6);
  font-size: 14px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}

.meta-item svg {
  color: rgba(0, 0, 0, 0.35);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6em;
}

/* ---------- buttons ---------- */

.ui.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1em;
  padding: 0.78571429em 1.5em;
  border: 1px solid rgba(34, 36, 38, 0.15);
  border-radius: var(--radius);
  color: rgba(0, 0, 0, 0.6);
  background: #e8e8e8;
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
}

.ui.button:hover {
  background: #e0e0e0;
  color: rgba(0, 0, 0, 0.8);
  text-decoration: none;
}

.ui.button.primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  font-weight: 400;
}

.ui.button.primary:hover {
  background: #3b77ad;
  color: #fff;
}

/* ---------- divider / segment / card / list ---------- */

.ui.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

.ui.segment {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px 0 rgba(34, 36, 38, 0.15);
  padding: 1em 1.25em;
}

.ui.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1em;
}

.ui.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px 0 #d4d4d5;
  overflow: hidden;
}

.ui.card:hover {
  box-shadow: 0 2px 8px 0 rgba(34, 36, 38, 0.2);
}

.ui.card .content {
  padding: 1em 1em;
}

.ui.card .header {
  font-size: 1.14285714rem;
  font-weight: 700;
  margin-bottom: 0.3em;
}

.ui.card .meta {
  color: rgba(0, 0, 0, 0.48);
  font-size: 13px;
  margin-bottom: 0.4em;
}

.ui.card .description {
  color: rgba(0, 0, 0, 0.68);
  font-size: 14px;
}

.ui.divided.list .item {
  padding: 0.75em 0;
}

.ui.divided.list .item + .item {
  border-top: 1px solid var(--border);
}

.ui.divided.list .header {
  font-weight: 700;
  color: rgba(0, 0, 0, 0.7);
  font-size: 13px;
}

.muted {
  color: var(--muted);
  margin: 0.4em 0 0;
  font-size: 14px;
}

p {
  margin: 0 0 0.75em;
}

/* ---------- footer ---------- */

.footer {
  margin-top: 2rem;
  padding: 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85em;
  color: #888;
}

.footer a {
  color: inherit;
}

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

.footer .made {
  margin: 0.75rem 0;
}

.footer .copyright,
.footer .beian {
  margin: 0.25rem 0;
}

/* ---------- responsive ---------- */

@media (max-width: 768px) {
  .ui.menu .item {
    padding: 0.78571429em 0.6em;
  }

  .main {
    padding: 1rem 1rem 0.25rem;
  }

  .ui.header {
    font-size: 1.6rem;
  }
}