/**
 * 设计系统文档页样式（index.html 专用）
 * 从 index.html 内联 <style> 抽离，便于维护与缩减主文件体积。
 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-family-sans);
  background: var(--color-bg-app);
  color: var(--color-text-1);
  transition: background 0.25s, color 0.25s;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-user-select: none;
  user-select: none;
}

/* ══════════════════════════════════════ 顶栏 ══════════════════════════════════════ */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--color-card-4);
  border-bottom: 1px solid var(--color-neutral-3);
}
.topbar-left { display: flex; align-items: center; }
.theme-toggle {
  display: flex; align-items: center;
  background: var(--color-neutral-2);
  border: 1px solid var(--color-neutral-3);
  border-radius: 100px; padding: 3px;
}
.toggle-btn {
  border: none; background: transparent;
  padding: 4px 12px; border-radius: 100px;
  font-size: 12px; font-weight: 500; cursor: pointer;
  color: var(--color-text-5); transition: all 0.2s;
}
.toggle-btn.active {
  background: var(--color-card-4); color: var(--color-text-1);
  box-shadow: 0 1px 3px var(--color-black-3);
}

/* ══════════════════════════════════════ 布局：左侧栏 + 内容区 ══════════════════════════════════════ */
.layout { display: flex; padding-top: 56px; min-height: 100vh; }

.sidebar {
  position: fixed;
  top: 56px; left: 0; bottom: 0;
  width: 220px;
  background: var(--color-card-4);
  border-right: 1px solid var(--color-neutral-3);
  overflow-y: auto;
  padding: 16px 0 32px;
}
.nav-group { margin-bottom: 4px; }
.nav-group-label {
  font-size: 11px; font-weight: 600; letter-spacing: 0.6px;
  text-transform: uppercase; color: var(--color-text-5);
  padding: 8px 20px 4px;
}
.nav-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 20px;
  font-size: 13px; font-weight: 500;
  color: var(--color-text-4);
  cursor: pointer;
  border-radius: 0;
  transition: background 0.15s, color 0.15s;
  border-left: 2px solid transparent;
  user-select: none;
}
.nav-item:hover { background: var(--color-neutral-2); color: var(--color-text-2); }
.nav-item.active {
  color: var(--color-text-1);
  border-left-color: var(--color-brand);
  background: var(--color-neutral-2);
  font-weight: 600;
}
.nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  flex-shrink: 0;
  color: inherit;
}
.nav-icon__svg {
  display: block;
  flex-shrink: 0;
  color: inherit;
}
.nav-divider { height: 1px; background: var(--color-neutral-3); margin: 8px 16px; }

.content { margin-left: 220px; flex: 1; min-width: 0; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.panel-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 40px 80px;
}

/* ══════════════════════════════════════ 通用：页头、章节 ══════════════════════════════════════ */
.page-header { margin-bottom: 40px; }
.page-header h1 {
  font-size: 26px; font-weight: 700;
  color: var(--color-text-1); margin-bottom: 6px;
}
.page-header p { font-size: 14px; color: var(--color-text-5); line-height: 1.6; }
.page-header .type-panel-note {
  margin-top: 10px;
  font-size: var(--text-callout-size);
  font-weight: var(--font-weight-regular);
  line-height: var(--text-callout-line-height);
  color: var(--color-text-5);
}
.page-header .type-panel-note code {
  font-family: ui-monospace, monospace;
  font-size: var(--text-caption1-size);
  color: var(--color-text-4);
  background: var(--color-neutral-2);
  padding: 1px 6px;
  border-radius: 4px;
}
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px; border-radius: 100px;
  font-size: 11px; font-weight: 500;
  background: var(--color-neutral-2); color: var(--color-text-4);
  margin: 8px 4px 0 0;
}

.section { margin-bottom: 52px; }
.section-header {
  display: flex; align-items: baseline; gap: 10px;
  margin-bottom: 20px; padding-bottom: 12px;
  border-bottom: 1px solid var(--color-neutral-3);
}
.section-title { font-size: 18px; font-weight: 700; color: var(--color-text-1); }
.section-desc  { font-size: 13px; color: var(--color-text-5); }
.layer-tag {
  font-size: 10px; font-weight: 600;
  padding: 2px 7px; border-radius: 4px;
  background: var(--color-progress-0); color: var(--color-progress-5);
  text-transform: uppercase; letter-spacing: 0.5px;
}

/* ══════════════════════════════════════ 色彩系统 — 架构、色板 ══════════════════════════════════════ */
.arch-card {
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  border-radius: 12px; padding: 20px;
}
.arch-flow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.arch-box  { padding: 10px 18px; border-radius: 8px; font-size: 13px; font-weight: 600; }
.arch-box-1 { background: var(--color-progress-0); color: var(--color-progress-5); }
.arch-box-2 { background: var(--color-success-1); color: var(--color-success-6); }
.arch-box-3 { background: var(--color-neutral-2); color: var(--color-text-3); }
.arch-arrow { color: var(--color-text-5); font-size: 16px; }
.arch-desc  { font-size: 12px; color: var(--color-text-5); margin-top: 3px; }

.palette-group { margin-bottom: 28px; }
.palette-group-name {
  font-size: 12px; font-weight: 600; color: var(--color-text-4);
  margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px;
}
.scale-row { display: flex; gap: 3px; flex-wrap: wrap; }
.swatch { flex: 1; min-width: 60px; border-radius: 7px; overflow: hidden; border: 1px solid var(--color-black-2); }
.swatch-color { height: 48px; }
.swatch-info { padding: 5px 7px; background: var(--color-card-4); }
.swatch-scale { font-size: 10px; font-weight: 600; color: var(--color-text-4); }
.swatch-hex   { font-size: 9px; color: var(--color-text-5); font-family: "SF Mono", monospace; margin-top: 1px; }

/* ─── 语义色板：分组卡片 + 亮/暗双语境画板 ─── */
.semantic-section .section-header {
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 8px 14px;
  row-gap: 10px;
}
.semantic-section .section-desc {
  flex: 1 1 220px;
  min-width: 0;
  line-height: 1.55;
}

/* 单列：一行仅一张语义分组卡片，亮/暗双栏有足够横向空间 */
.semantic-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  width: 100%;
}
.semantic-card {
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-elevation-100);
  width: 100%;
  min-width: 0;
}
.semantic-card--split {
  display: flex;
  flex-direction: column;
}
.semantic-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  font-size: var(--text-headline-size);
  font-weight: var(--font-weight-semibold);
  line-height: var(--text-headline-line-height);
  color: var(--color-text-1);
  border-bottom: 1px solid var(--color-neutral-3);
  flex-shrink: 0;
}
.semantic-card-header::before {
  content: "";
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background: var(--color-brand);
  flex-shrink: 0;
}
.semantic-card-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 12px;
  min-width: 0;
  flex: 1;
  background: var(--color-neutral-2);
}
.semantic-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--color-bg-app);
  border-radius: 8px;
  border: 1px solid var(--color-divider);
  box-shadow: var(--shadow-aboat-soft-1);
  overflow: hidden;
}
.semantic-panel__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  flex-shrink: 0;
  background: var(--color-bg-2);
  border-bottom: 1px solid var(--color-divider);
}
.semantic-panel__title {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: var(--text-caption1-size);
  font-weight: var(--font-weight-semibold);
  line-height: var(--text-caption1-line-height);
}
.semantic-panel--light .semantic-panel__title {
  background: var(--color-progress-alpha-1);
  color: var(--color-progress-5);
}
.semantic-panel--dark .semantic-panel__title {
  background: var(--color-progress-1);
  color: var(--color-progress-5);
}
.semantic-panel__hint {
  font-size: var(--text-footnote-size);
  font-weight: var(--font-weight-regular);
  line-height: var(--text-footnote-line-height);
  color: var(--color-text-5);
  text-align: right;
  flex: 1 1 auto;
  min-width: 0;
  white-space: normal;
}
.semantic-panel__rows {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 6px 10px;
}
.semantic-panel .semantic-row {
  padding: 0;
  margin: 0 6px;
}
@media (max-width: 600px) {
  .semantic-card-panels {
    grid-template-columns: 1fr;
  }
}
/* 单行：色块 | 引用链（占满中间，可换行完整显示）| 中文名（最右） */
.semantic-row {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  align-items: start;
  column-gap: 8px;
  padding: 9px 10px;
  border-radius: 6px;
  transition: background 0.15s var(--motion-ease-out-soft);
}
.semantic-row:hover {
  background: var(--color-neutral-2);
}
@media (prefers-reduced-motion: reduce) {
  .semantic-row {
    transition: none;
  }
}
.semantic-dot {
  display: block;
  box-sizing: border-box;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--color-black-2);
  grid-column: 1;
  grid-row: 1;
  align-self: start;
  margin-top: 1px;
  justify-self: center;
  box-shadow: inset 0 1px 0 var(--color-white-1);
}
.semantic-label {
  grid-column: 3;
  grid-row: 1;
  align-self: start;
  margin-top: 1px;
  justify-self: end;
  text-align: right;
  min-width: 0;
  font-size: var(--text-callout-size);
  font-weight: var(--font-weight-regular);
  line-height: var(--text-callout-line-height);
  color: var(--color-text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
/* token 名仍写在 DOM 中供脚本读取，不在界面重复展示（引用链已含同名） */
.semantic-var {
  display: none;
}
/* 紧挨色块，中间列拉满；允许换行以完整展示 var 链 */
.semantic-palette-ref {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  font-size: var(--text-caption1-size);
  line-height: var(--text-caption1-line-height);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-5);
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
  text-align: left;
  justify-self: start;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}
.subject-card { border-radius: 10px; overflow: hidden; border: 1px solid var(--color-black-2); }
.subject-top  { height: 72px; display: flex; align-items: flex-end; padding: 10px; }
.subject-name { font-size: 14px; font-weight: 700; color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,0.3); }
.subject-swatches { display: flex; }
.subject-swatch { flex: 1; height: 24px; }

.heat-row  { display: flex; gap: 10px; flex-wrap: wrap; }
.heat-swatch { display: flex; flex-direction: column; align-items: center; gap: 5px; }
.heat-dot  { width: 44px; height: 44px; border-radius: 9px; border: 1px solid var(--color-black-2); }
.heat-label{ font-size: 10px; color: var(--color-text-5); }

/* ══════════════════════════════════════ 组件页 — 状态展示、Brand Logo ══════════════════════════════════════ */
.brand-logo-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}
.brand-logo-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
}
.brand-logo-preview-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 120px;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--color-neutral-3);
  box-sizing: border-box;
}
.brand-logo-preview--light {
  background: var(--color-card-4);
}
.brand-logo-preview-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-5);
}
.brand-logo-asset {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}
.brand-logo-asset--icon {
  max-height: 64px;
}

.comp-intro {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px; margin-bottom: 0;
}
.spec-card {
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  border-radius: 10px; padding: 14px;
}
.spec-label { font-size: 11px; color: var(--color-text-5); margin-bottom: 3px; }
.spec-value { font-size: 14px; font-weight: 600; color: var(--color-text-1); }
.spec-sub   { font-size: 10px; color: var(--color-text-5); margin-top: 2px; font-family: monospace; }

/* 状态表格 */
.state-table {
  display: grid;
  grid-template-columns: 88px repeat(4, 1fr);
  border: 1px solid var(--color-neutral-3);
  border-radius: 12px; overflow: hidden;
  background: var(--color-card-4);
  margin-bottom: 32px;
}
.state-head {
  font-size: 11px; font-weight: 600; color: var(--color-text-5);
  padding: 8px 14px;
  background: var(--color-neutral-2);
  border-bottom: 1px solid var(--color-neutral-3);
}
.state-label {
  display: flex; align-items: center; padding: 0 14px;
  font-size: 12px; color: var(--color-text-4); font-weight: 500;
  border-bottom: 1px solid var(--color-neutral-3);
  border-right: 1px solid var(--color-neutral-3);
  min-height: 80px;
  background: var(--color-neutral-2);
}
.state-cell {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 8px;
  padding: 16px 10px;
  border-bottom: 1px solid var(--color-neutral-3);
  border-right: 1px solid var(--color-neutral-3);
  position: relative;
}
.state-cell:last-child { border-right: none; }
.state-row-last .state-label,
.state-row-last .state-cell { border-bottom: none; }

.state-badge {
  font-size: 10px; font-weight: 600; letter-spacing: 0.3px;
  padding: 2px 7px; border-radius: 100px; white-space: nowrap;
}
.badge-default  { background: var(--color-neutral-2); color: var(--color-text-5); }
.badge-hover    { background: var(--color-progress-0); color: var(--color-progress-5); }
.badge-active   { background: var(--color-reading-1); color: var(--color-reading-6); }
.badge-disabled { background: var(--color-neutral-3); color: var(--color-text-5); }
.badge-focus   { background: var(--color-orange-1); color: var(--color-orange-3); }

.force-hover::after        { background: rgba(255,255,255,0.10) !important; }
.force-active::after       { background: rgba(255,255,255,0.18) !important; transform: scale(0.98); }
.force-hover-light::after  { background: rgba(26,26,26,0.05) !important; }
.force-active-light::after { background: rgba(26,26,26,0.10) !important; transform: scale(0.98); }
.force-active-ghost::after { background: rgba(26,26,26,0.10) !important; }
.force-active-ghost { transform: scale(0.96); }
.force-hover-brand::after  { background: rgba(0,0,0,0.08) !important; }
.force-active-brand::after { background: rgba(0,0,0,0.14) !important; transform: scale(0.98); }
.force-hover-danger::after  { background: rgba(220,40,40,0.06) !important; }
.force-active-danger::after { background: rgba(220,40,40,0.12) !important; transform: scale(0.98); }

.force-hover-icon-ghost::after  { background: var(--color-icon-button-hover-bg) !important; }
.force-active-icon-ghost::after { background: var(--color-icon-button-pressed-bg) !important; }
.force-active-icon-ghost { transform: scale(0.96); }
.force-focus-icon-ghost {
  outline: none !important;
  box-shadow: inset 0 0 0 2px var(--color-brand) !important;
}

.demo-strip {
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  border-radius: 12px; overflow: hidden;
}
.demo-preview {
  padding: 28px;
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  border-bottom: 1px solid var(--color-neutral-3);
}
.demo-code {
  padding: 18px 22px;
  font-family: "SF Mono", monospace; font-size: 12px; line-height: 1.8;
  color: var(--color-text-4); background: var(--color-neutral-2);
}
.c-tag  { color: var(--color-progress-5); }
.c-attr { color: var(--color-reading-6); }
.c-val  { color: var(--color-brand); }
.c-cmt  { color: var(--color-text-5); }

.color-map-card {
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  border-radius: 12px; overflow: hidden;
}
.color-row {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 16px; transition: background 0.15s;
}
.color-row:hover { background: var(--color-neutral-2); }
.color-dot {
  width: 22px; height: 22px; border-radius: 5px;
  border: 1px solid var(--color-black-2); flex-shrink: 0;
}
.color-name { font-size: 12px; color: var(--color-text-2); flex: 1; }
.color-var  { font-size: 10px; color: var(--color-text-5); font-family: monospace; }
.color-hex  { font-size: 10px; color: var(--color-text-5); font-family: monospace; min-width: 76px; text-align: right; }

/* ══════════════════════════════════════ 阴影 Elevation 展示 ══════════════════════════════════════ */
.elevation-row {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.elevation-row.elevation-cards {
  margin-top: 8px;
  gap: 40px;
}
.elevation-label {
  width: 80px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-5);
  flex-shrink: 0;
}
.elevation-card {
  width: 100px;
  height: 100px;
  border-radius: 13px;
  background: var(--color-card-4);
  flex-shrink: 0;
}

/* 阴影面板：第二套（Aboat 软阴影）与第一套区隔 */
.section.shadow-set-aboat-soft {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 2px solid var(--color-neutral-3);
}

.ds-aboat-soft-css-copy {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ds-aboat-soft-css-copy__hint {
  margin: 0;
  max-width: 720px;
  font-size: var(--text-callout-size);
  line-height: var(--text-callout-line-height);
  font-weight: var(--text-callout-weight);
  color: var(--color-text-5);
}
.ds-aboat-soft-css-copy__code {
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--color-neutral-2);
  color: var(--color-text-3);
  font-size: var(--text-caption1-size);
  line-height: var(--text-caption1-line-height);
}
.ds-aboat-soft-css-copy__wrap {
  position: relative;
  width: 100%;
}
/* 较设计系统 32×32 略小，贴文本框右下角，浅底避免与 textarea 糊在一起 */
.ds-aboat-soft-css-copy__fab.btn-icon-ghost {
  position: absolute;
  right: 6px;
  bottom: 6px;
  z-index: 1;
  width: 28px;
  height: 28px;
  min-height: 28px;
  border-radius: 8px;
  background: var(--color-card-4);
  box-shadow: var(--shadow-aboat-soft-1);
  color: var(--color-text-4);
}
.ds-aboat-soft-css-copy__textarea {
  box-sizing: border-box;
  width: 100%;
  margin: 0;
  padding: 12px 44px 44px 14px;
  border-radius: 8px;
  border: 1px solid var(--color-neutral-3);
  background: var(--color-card-3);
  color: var(--color-text-2);
  font-family: ui-monospace, "SF Mono", "MiSans", monospace;
  font-size: var(--text-caption1-size);
  line-height: 1.45;
  resize: vertical;
  min-height: 220px;
  transition: border-color 0.2s var(--motion-ease-out-soft, ease-out), box-shadow 0.2s var(--motion-ease-out-soft, ease-out);
}
.ds-aboat-soft-css-copy__textarea:hover {
  border-color: var(--color-neutral-4);
}
.ds-aboat-soft-css-copy__textarea:focus {
  outline: none;
  border-color: var(--color-progress-3);
  box-shadow: 0 0 0 3px var(--color-progress-alpha-2);
}

/* ══════════════════════════════════════ 字体 Typography 展示 ══════════════════════════════════════ */
.type-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-neutral-3);
}
.type-row:last-of-type { margin-bottom: 0; border-bottom: none; }
.type-label {
  width: 120px;
  font-size: var(--text-footnote-size);
  line-height: var(--text-footnote-line-height);
  color: var(--color-text-5);
  flex-shrink: 0;
  padding-top: 2px;
}
.type-block {
  flex: 1;
  min-width: 0;
}
.type-variants {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  align-items: baseline;
}
.type-variant-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.type-variant-label {
  font-size: 10px;
  color: var(--color-text-5);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.type-sample {
  color: var(--color-text-1);
}
/* 基础样式（Regular） */
.type-large-title { font-size: var(--text-large-title-size); line-height: var(--text-large-title-line-height); font-weight: var(--text-large-title-weight); }
.type-title1 { font-size: var(--text-title1-size); line-height: var(--text-title1-line-height); font-weight: var(--text-title1-weight); }
.type-title2 { font-size: var(--text-title2-size); line-height: var(--text-title2-line-height); font-weight: var(--text-title2-weight); }
.type-title3 { font-size: var(--text-title3-size); line-height: var(--text-title3-line-height); font-weight: var(--text-title3-weight); }
.type-headline { font-size: var(--text-headline-size); line-height: var(--text-headline-line-height); font-weight: var(--text-headline-weight); }
.type-body { font-size: var(--text-body-size); line-height: var(--text-body-line-height); font-weight: var(--text-body-weight); }
.type-callout { font-size: var(--text-callout-size); line-height: var(--text-callout-line-height); font-weight: var(--text-callout-weight); }
.type-subheadline { font-size: var(--text-subheadline-size); line-height: var(--text-subheadline-line-height); font-weight: var(--text-subheadline-weight); }
.type-footnote { font-size: var(--text-footnote-size); line-height: var(--text-footnote-line-height); font-weight: var(--text-footnote-weight); }
.type-caption1 { font-size: var(--text-caption1-size); line-height: var(--text-caption1-line-height); font-weight: var(--text-caption1-weight); }
.type-caption2 { font-size: var(--text-caption2-size); line-height: var(--text-caption2-line-height); font-weight: var(--text-caption2-weight); }
/* 粗细变体（与 tokens/typography.css 对应） */
.type-large-title-semibold { font-weight: var(--text-large-title-weight-semibold); }
.type-title1-semibold { font-weight: var(--text-title1-weight-semibold); }
.type-title2-medium { font-weight: var(--text-title2-weight-medium); }
.type-title2-semibold { font-weight: var(--text-title2-weight-semibold); }
.type-title3-semibold { font-weight: var(--text-title3-weight-semibold); }
.type-title3-bold { font-weight: var(--text-title3-weight-bold); }
.type-headline-semibold { font-weight: var(--text-headline-weight-semibold); }
.type-headline-heavy { font-weight: var(--text-headline-weight-heavy); }
.type-body-semibold { font-weight: var(--text-body-weight-semibold); }
.type-callout-medium { font-weight: var(--text-callout-weight-medium); }
.type-callout-semibold { font-weight: var(--text-callout-weight-semibold); }
.type-subheadline-semibold { font-weight: var(--text-subheadline-weight-semibold); }
.type-footnote-semibold { font-weight: var(--text-footnote-weight-semibold); }
.type-caption1-demibold { font-weight: var(--text-caption1-weight-demibold); }
.type-token {
  font-size: 10px;
  color: var(--color-text-5);
  font-family: "SF Mono", monospace;
  margin-top: 10px;
}

/* ══════════════════════════════════════ 动效 Motion 悬停预览卡片 ══════════════════════════════════════ */
.motion-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  align-items: stretch;
}
.motion-preview-card {
  display: flex;
  flex-direction: column;
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.motion-preview-card:hover {
  box-shadow: var(--shadow-aboat-soft-2);
  border-color: color-mix(in srgb, var(--color-neutral-4) 80%, var(--color-brand));
}
.motion-preview-card:focus-within {
  outline: 2px solid color-mix(in srgb, var(--color-brand) 45%, transparent);
  outline-offset: 2px;
}
.motion-preview-card__stage {
  min-height: 128px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--color-neutral-1);
  border-bottom: 1px solid var(--color-neutral-3);
}
.motion-preview-card__title {
  margin: 0;
  padding: 12px 14px 4px;
  font-size: var(--text-headline-size);
  font-weight: var(--text-headline-weight-semibold);
  line-height: var(--text-headline-line-height);
  color: var(--color-text-1);
}
.motion-preview-card__desc {
  margin: 0;
  padding: 0 14px 8px;
  font-size: var(--text-callout-size);
  line-height: var(--text-callout-line-height);
  color: var(--color-text-3);
  flex: 1;
}
.motion-preview-card__file {
  margin: 0;
  padding: 0 14px 14px;
  font-size: var(--text-footnote-size);
  line-height: var(--text-footnote-line-height);
  color: var(--color-text-5);
  font-family: "SF Mono", ui-monospace, monospace;
}

/* —— 各演示初始态 + :hover 重播（使用 motion.css Token）—— */
.motion-preview-card__demo--fade-up {
  width: min(100%, 200px);
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--color-brand), color-mix(in srgb, var(--color-brand) 55%, var(--color-orange-2)));
  opacity: 0.28;
  transform: translateY(14px);
  box-shadow: var(--shadow-aboat-soft-1);
}
.motion-preview-card:hover .motion-preview-card__demo--fade-up {
  animation: dsMotionPreviewFadeUp 0.75s var(--motion-ease-out-soft) forwards;
}

.motion-preview-card__demo--reveal {
  width: min(100%, 180px);
  height: 40px;
  border-radius: 8px;
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  box-shadow: var(--shadow-elevation-100);
  opacity: 0.2;
  transform: translateY(28px);
}
.motion-preview-card:hover .motion-preview-card__demo--reveal {
  animation: dsMotionPreviewReveal 0.75s var(--motion-ease-out-soft) forwards;
}

.motion-preview-card__demo--img-fade {
  width: 72px;
  height: 72px;
  border-radius: 12px;
  background: var(--color-neutral-3);
  opacity: 0.15;
}
.motion-preview-card:hover .motion-preview-card__demo--img-fade {
  animation: dsMotionPreviewFadeOnly 0.45s ease forwards;
}

.motion-preview-card__demo--btn {
  padding: 10px 20px;
  border-radius: 10px;
  font-size: var(--text-headline-size);
  font-weight: var(--text-headline-weight-semibold);
  line-height: 1;
  color: var(--color-text-7);
  background: var(--color-btn-base);
  transform: translateY(0) scale(1);
  box-shadow: var(--shadow-aboat-soft-1);
}
.motion-preview-card:hover .motion-preview-card__demo--btn {
  animation: dsMotionPreviewBtnLift 0.35s var(--motion-ease-out-soft) forwards;
}

.motion-preview-card__demo-spin-wrap {
  width: 40px;
  height: 40px;
  position: relative;
}
.motion-preview-card__demo--spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--color-neutral-3);
  border-top-color: var(--color-text-4);
  border-radius: 50%;
}
.motion-preview-card:hover .motion-preview-card__demo--spinner {
  animation: dsMotionPreviewSpin 0.8s linear infinite;
}

.motion-preview-card__demo--popover {
  width: 120px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: var(--text-callout-size);
  line-height: 1.3;
  color: var(--color-text-2);
  background: var(--color-card-4);
  border: 1px solid var(--color-neutral-3);
  box-shadow: var(--shadow-elevation-200);
  opacity: 0.35;
  transform: scale(0.94) translateY(6px);
}
.motion-preview-card:hover .motion-preview-card__demo--popover {
  animation: dsMotionPreviewPopover 0.34s var(--motion-ease-out-soft) forwards;
}

.motion-preview-card__demo--stats {
  width: min(100%, 200px);
  height: 56px;
  border-radius: 12px;
  border: 1px solid var(--color-card-light-alpha);
  background: var(--color-card-light-alpha);
  opacity: 0.25;
  transform: translate3d(0, 14px, 0);
}
.motion-preview-card:hover .motion-preview-card__demo--stats {
  animation: dsMotionPreviewStatsEnter 0.52s var(--motion-ease-out-soft) forwards;
}

.motion-preview-card__demo--stagger {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  height: 56px;
}
.motion-preview-card__demo--stagger span {
  width: 22px;
  border-radius: 4px 4px 0 0;
  background: var(--color-orange-3);
  opacity: 0.2;
  transform: scaleY(0.35);
  transform-origin: bottom center;
}
.motion-preview-card__demo--stagger span:nth-child(1) { height: 28px; }
.motion-preview-card__demo--stagger span:nth-child(2) { height: 44px; }
.motion-preview-card__demo--stagger span:nth-child(3) { height: 36px; }
.motion-preview-card:hover .motion-preview-card__demo--stagger span:nth-child(1) {
  animation: dsMotionPreviewBar 0.48s var(--motion-ease-out-soft) forwards;
  animation-delay: 0s;
}
.motion-preview-card:hover .motion-preview-card__demo--stagger span:nth-child(2) {
  animation: dsMotionPreviewBar 0.48s var(--motion-ease-out-soft) forwards;
  animation-delay: 0.05s;
}
.motion-preview-card:hover .motion-preview-card__demo--stagger span:nth-child(3) {
  animation: dsMotionPreviewBar 0.48s var(--motion-ease-out-soft) forwards;
  animation-delay: 0.1s;
}

.motion-preview-card__line-svg {
  width: 100px;
  height: 48px;
  overflow: visible;
}
.motion-preview-card__line-svg path {
  fill: none;
  stroke: var(--color-brand);
  stroke-width: 2.25;
  stroke-linecap: round;
  stroke-linejoin: round;
  /* 与 HTML path 上 pathLength="100" 对齐，便于 dash 全长拉线 */
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
}
.motion-preview-card:hover .motion-preview-card__line-svg path {
  animation: dsMotionPreviewLineDraw 1.1s var(--motion-ease-line-draw) forwards;
}

.motion-preview-card__demo--tip-host {
  position: relative;
  width: 100px;
  height: 44px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.motion-preview-card__demo--tip-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-brand);
}
.motion-preview-card__demo--tip-bubble {
  position: absolute;
  left: 50%;
  bottom: 100%;
  margin-bottom: 6px;
  transform: translateX(-50%);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: var(--text-footnote-size);
  line-height: 1.2;
  white-space: nowrap;
  color: var(--color-bg-learn);
  background: var(--color-text-1);
  box-shadow: var(--shadow-elevation-300);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.motion-preview-card:hover .motion-preview-card__demo--tip-bubble {
  opacity: 1;
}

@keyframes dsMotionPreviewFadeUp {
  from {
    opacity: 0.28;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes dsMotionPreviewReveal {
  from {
    opacity: 0.2;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes dsMotionPreviewFadeOnly {
  to {
    opacity: 1;
  }
}
@keyframes dsMotionPreviewBtnLift {
  0% {
    transform: translateY(0) scale(1);
    box-shadow: var(--shadow-aboat-soft-1);
  }
  100% {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-aboat-soft-3);
  }
}
@keyframes dsMotionPreviewSpin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes dsMotionPreviewPopover {
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}
@keyframes dsMotionPreviewStatsEnter {
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}
@keyframes dsMotionPreviewBar {
  to {
    opacity: 1;
    transform: scaleY(1);
  }
}
@keyframes dsMotionPreviewLineDraw {
  to {
    stroke-dashoffset: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .motion-preview-card:hover .motion-preview-card__demo--fade-up,
  .motion-preview-card:hover .motion-preview-card__demo--reveal,
  .motion-preview-card:hover .motion-preview-card__demo--img-fade,
  .motion-preview-card:hover .motion-preview-card__demo--btn,
  .motion-preview-card:hover .motion-preview-card__demo--popover,
  .motion-preview-card:hover .motion-preview-card__demo--stats,
  .motion-preview-card:hover .motion-preview-card__line-svg path {
    animation: none !important;
  }
  .motion-preview-card:hover .motion-preview-card__demo--fade-up,
  .motion-preview-card:hover .motion-preview-card__demo--reveal,
  .motion-preview-card:hover .motion-preview-card__demo--img-fade,
  .motion-preview-card:hover .motion-preview-card__demo--popover,
  .motion-preview-card:hover .motion-preview-card__demo--stats {
    opacity: 1;
    transform: none;
  }
  .motion-preview-card:hover .motion-preview-card__demo--btn {
    transform: none;
  }
  .motion-preview-card:hover .motion-preview-card__line-svg path {
    stroke-dashoffset: 0;
  }
  .motion-preview-card:hover .motion-preview-card__demo--stagger span {
    opacity: 1;
    transform: scaleY(1);
    animation: none !important;
  }
  .motion-preview-card:hover .motion-preview-card__demo--spinner {
    animation: none !important;
  }
  .motion-preview-card__demo--tip-bubble {
    transition: opacity 0.12s ease;
  }
}

/* ══════════════════════════════════════ 设计系统 · 表单演示（index 面板） ══════════════════════════════════════ */
.ds-form-label {
  display: block;
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  color: var(--color-text-3);
  margin-bottom: 8px;
}

.ds-radio-demo {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.ds-radio-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--color-neutral-3);
  border-radius: 10px;
  background: var(--color-card-4);
  color: var(--color-text-2);
  font-family: var(--font-family-sans);
  font-size: var(--text-body-size);
  line-height: 1.4;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.ds-radio-chip.is-selected {
  border-color: var(--color-progress-alpha-2);
  background: var(--color-neutral-2);
}

/* ══════════════════════════════════════ 音效面板 · 试听网格（index 音效 tab） ══════════════════════════════════════ */
.ds-sfx-demo-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
  max-width: 1080px;
}

.ds-sfx-group {
  margin-bottom: 24px;
}

.ds-sfx-group:last-child {
  margin-bottom: 0;
}

.ds-sfx-group__title {
  font-size: var(--text-headline-size);
  font-weight: var(--font-weight-semibold);
  line-height: var(--text-headline-line-height);
  color: var(--color-text-2);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-neutral-3);
}

.ds-sfx-group__rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ds-sfx-row {
  display: grid;
  grid-template-columns: minmax(120px, 1.2fr) minmax(0, 1fr) auto auto;
  grid-template-areas: "label id p actions";
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-neutral-3);
  background: var(--color-card-4);
}

.ds-sfx-row__id {
  grid-area: id;
  font-family: ui-monospace, "SF Mono", "Menlo", monospace;
  font-size: var(--text-caption1-size);
  line-height: var(--text-caption1-line-height);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-3);
  word-break: break-all;
  min-width: 0;
}

.ds-sfx-row__p {
  grid-area: p;
  font-size: var(--text-caption1-size);
  line-height: var(--text-caption1-line-height);
  color: var(--color-text-5);
  white-space: nowrap;
}

.ds-sfx-row__actions {
  grid-area: actions;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
}

.ds-sfx-row__label {
  grid-area: label;
  font-size: var(--text-body-size);
  font-weight: var(--font-weight-medium);
  line-height: var(--text-body-line-height);
  color: var(--color-text-2);
  text-align: left;
  justify-self: start;
  min-width: 0;
}

.ds-sfx-row--muted {
  opacity: 0.72;
}

@media (max-width: 720px) {
  .ds-sfx-row {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "label actions"
      "id p";
    row-gap: 8px;
  }

  .ds-sfx-row__label {
    justify-self: start;
    text-align: left;
  }

  .ds-sfx-row__actions {
    justify-content: flex-end;
  }

  .ds-sfx-row__p {
    justify-self: end;
  }
}

/* 顶栏亮暗切换：与 learn 页一致的根级 View Transition（支持且未减少动效时） */
html {
  view-transition-name: root;
}

@media (prefers-reduced-motion: no-preference) {
  @supports (view-transition-name: root) {
    ::view-transition-group(root) {
      animation-duration: 0.42s;
      animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
    }
  }
}