:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-2: #f0f2f5;
  --text: #1f2329;
  --text-dim: #6b7280;
  --border: #e3e6eb;
  --primary: #3b6cf6;
  --primary-dim: #e5edff;
  --danger: #e5484d;
  --stable: #2fa25b;
  --beta: #d98b12;
  --canary: #8b5cf6;
  --breaking: #e5484d;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
[data-theme="dark"] {
  --bg: #14161a;
  --panel: #1c1f26;
  --panel-2: #252932;
  --text: #e6e8eb;
  --text-dim: #9aa4b2;
  --border: #2c313a;
  --primary: #5b82f8;
  --primary-dim: #263250;
  --danger: #f0616a;
  --stable: #40c073;
  --beta: #e6a028;
  --canary: #a684f8;
  --breaking: #f0616a;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  transition: background 0.2s, color 0.2s;
}
h1, h2, h3 { margin: 0; }
.hidden { display: none !important; }

/* 顶栏 */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px; background: var(--panel);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 26px; }
.brand h1 { font-size: 18px; }
.brand .sub { margin: 0; font-size: 12px; color: var(--text-dim); }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.user-badge {
  font-size: 13px; color: var(--text-dim);
  background: var(--panel-2); padding: 4px 10px; border-radius: 20px;
}

/* 布局 */
.layout { display: flex; height: calc(100vh - 61px); }
.sidebar {
  width: 280px; flex-shrink: 0; background: var(--panel);
  border-right: 1px solid var(--border); overflow-y: auto; padding: 16px;
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.sidebar-head h2 { font-size: 14px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; }
.sdk-list { display: flex; flex-direction: column; gap: 6px; }
.sdk-item {
  padding: 10px 12px; border-radius: 8px; cursor: pointer;
  border: 1px solid transparent; transition: background 0.15s;
}
.sdk-item:hover { background: var(--panel-2); }
.sdk-item.active { background: var(--primary-dim); border-color: var(--primary); }
.sdk-item .name { font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.sdk-item .meta { font-size: 12px; color: var(--text-dim); margin-top: 3px; }

.content { flex: 1; overflow-y: auto; padding: 24px 32px; }
.empty-state { display: flex; align-items: center; justify-content: center; height: 60vh; color: var(--text-dim); font-size: 16px; }

.panel-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.panel-head h2 { font-size: 22px; }
.sdk-meta { color: var(--text-dim); margin: 6px 0 0; font-size: 13px; }
.sdk-meta a { color: var(--primary); text-decoration: none; }
.panel-actions { display: flex; gap: 8px; flex-shrink: 0; }

.filters { display: flex; gap: 10px; margin-bottom: 20px; }
.filters input, .filters select {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel); color: var(--text); font-size: 13px;
}
.filters input { flex: 1; }

/* 时间线 */
.timeline { position: relative; padding-left: 24px; }
.timeline::before {
  content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px;
  width: 2px; background: var(--border);
}
.release-card {
  position: relative; background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 18px; margin-bottom: 16px; box-shadow: var(--shadow);
}
.release-card::before {
  content: ""; position: absolute; left: -22px; top: 20px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--primary); border: 2px solid var(--panel);
}
.release-card.latest::before { box-shadow: 0 0 0 4px var(--primary-dim); }
.rc-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.rc-version { font-size: 17px; font-weight: 700; }
.rc-date { color: var(--text-dim); font-size: 13px; margin-left: auto; }
.rc-sub { color: var(--text-dim); font-size: 13px; margin-top: 8px; }

/* 内联更新内容 + 折叠 */
.rc-changelog { margin-top: 12px; }
.rc-changelog.collapsed {
  max-height: 140px; overflow: hidden;
  -webkit-mask-image: linear-gradient(180deg, #000 70%, transparent);
  mask-image: linear-gradient(180deg, #000 70%, transparent);
}
.rc-toggle {
  margin-top: 8px; background: none; border: none; color: var(--primary);
  cursor: pointer; font-size: 13px; padding: 2px 0; font-weight: 500;
}
.rc-toggle:hover { text-decoration: underline; }
.rc-actions {
  display: flex; gap: 8px; margin-top: 14px; padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* 标签 */
.tag { font-size: 11px; padding: 2px 8px; border-radius: 20px; font-weight: 600; }
.tag.latest { background: var(--primary-dim); color: var(--primary); }
.tag.stable { background: color-mix(in srgb, var(--stable) 18%, transparent); color: var(--stable); }
.tag.beta { background: color-mix(in srgb, var(--beta) 18%, transparent); color: var(--beta); }
.tag.canary { background: color-mix(in srgb, var(--canary) 18%, transparent); color: var(--canary); }
.tag.breaking { background: color-mix(in srgb, var(--breaking) 18%, transparent); color: var(--breaking); }

/* 按钮 */
.btn {
  padding: 8px 16px; border: none; border-radius: 8px; cursor: pointer;
  background: var(--primary); color: #fff; font-size: 13px; font-weight: 500;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.88; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn.small { padding: 6px 12px; font-size: 12px; }
.btn.ghost { background: var(--panel-2); color: var(--text); }
.btn.danger { background: var(--danger); }
.icon-btn {
  width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel); color: var(--text); cursor: pointer; font-size: 16px;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--panel-2); }

/* 弹窗 */
.modal {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.45);
  display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.modal-box {
  background: var(--panel); border-radius: 12px; padding: 24px;
  width: 100%; max-width: 420px; box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  max-height: 90vh; overflow-y: auto;
}
.modal-box.wide { max-width: 620px; }
.modal-box h3 { margin-bottom: 18px; }
.modal-box form { display: flex; flex-direction: column; gap: 14px; }
.modal-box label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--text-dim); }
.check-label { flex-direction: row !important; align-items: center; gap: 8px; }
.modal-box input, .modal-box textarea, .modal-box select {
  padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); font-size: 14px; font-family: inherit;
}
.modal-box textarea { resize: vertical; }
.form-row { display: flex; gap: 12px; }
.form-row label { flex: 1; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 6px; }
.form-err { color: var(--danger); font-size: 12px; margin: 0; min-height: 14px; }
.upload-progress { display: flex; align-items: center; gap: 10px; }
.upload-bar { flex: 1; height: 8px; background: var(--panel-2); border-radius: 6px; overflow: hidden; }
.upload-bar-fill { height: 100%; width: 0; background: var(--primary); transition: width 0.15s; }
.upload-pct { font-size: 12px; color: var(--text-dim); min-width: 48px; text-align: right; }
.file-current { font-size: 12px; color: var(--text-dim); }
.file-current a { color: var(--primary); }

/* 下载区 */
.dl-row { display: flex; gap: 10px; flex-wrap: wrap; margin: 4px 0 12px; }
.dl-btn {
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
  padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel-2); color: var(--text); font-size: 13px;
  font-family: inherit; cursor: pointer;
}
.dl-btn:hover { border-color: var(--primary); }
.dl-btn .sz { color: var(--text-dim); font-size: 12px; }
.dl-none { color: var(--text-dim); font-size: 13px; }
.lock-tag { margin-top: 8px; font-size: 13px; color: var(--text-dim); }
.lock-tag code {
  background: var(--panel-2); padding: 1px 8px; border-radius: 4px;
  color: var(--text); font-size: 13px; user-select: all;
}

/* 详情 Markdown */
.detail-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.detail-head h3 { font-size: 22px; }
.detail-sub { color: var(--text-dim); font-size: 13px; margin-bottom: 16px; }
.detail-sub a { color: var(--primary); }
.markdown { line-height: 1.65; }
.markdown h1, .markdown h2, .markdown h3 { margin: 16px 0 8px; }
.markdown h2 { font-size: 16px; border-bottom: 1px solid var(--border); padding-bottom: 4px; }
.markdown h3 { font-size: 14px; }
.markdown ul { padding-left: 22px; margin: 8px 0; }
.markdown li { margin: 3px 0; }
.markdown code { background: var(--panel-2); padding: 1px 6px; border-radius: 4px; font-size: 13px; }
.markdown a { color: var(--primary); }
.markdown p { margin: 8px 0; }

@media (max-width: 720px) {
  .layout { flex-direction: column; height: auto; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
  .form-row { flex-direction: column; }
}