:root {
  --color-bg: #ffffff;
  --color-text: #171a1c;
  --color-muted: #5b636b;
  --color-line: #e5e7ea;
  --color-accent: #1f4e9c;
  --color-status: #c2410c;
  --color-soft: #f6f7f8;
  --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
  --w-page: 1180px;
  --w-inner: 960px;
  --w-text: 720px;
  --radius: 4px;
  --header-h: 64px;
}

/* ============================================================
   base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body.site-body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.9;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
}

p {
  margin: 0 0 14px;
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

a:hover {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

figure {
  margin: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 60;
  padding: 10px 16px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  text-decoration: none;
}

/* ============================================================
   layout — 全站外壳
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: var(--w-page);
  min-height: var(--header-h);
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  flex: 0 0 auto;
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text);
}

.brand:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.primary-nav {
  flex: 1 1 auto;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 22px;
}

.nav-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--color-accent);
  font-weight: 600;
  border-bottom-color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
}

.site-main {
  display: block;
}

.home-main {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.inner-main {
  max-width: var(--w-inner);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.site-inner {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 14px 0 0;
  font-size: 14px;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-muted);
}

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

.breadcrumb-sep {
  color: var(--color-line);
}

.breadcrumb-current {
  color: var(--color-text);
}

/* 页面标题区 */
.page-header {
  padding: 12px 0 20px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
}

.page-description {
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--color-muted);
  max-width: var(--w-text);
}

/* 内页顶部导语 */
.page-hero {
  padding: 22px 0 4px;
}

.page-lead {
  max-width: var(--w-text);
  font-size: 15px;
  color: var(--color-muted);
}

.page-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
  gap: 28px;
  align-items: center;
}

.page-hero-text {
  min-width: 220px;
}

.page-hero-note {
  max-width: var(--w-text);
  font-size: 15px;
  color: var(--color-muted);
}

.page-hero-lead {
  max-width: var(--w-text);
  font-size: 15px;
  color: var(--color-muted);
}

.page-hero-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-hero-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.page-hero-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-muted);
  background: var(--color-soft);
  border-top: 1px solid var(--color-line);
}

/* 内容区通用 section */
.section {
  padding: 40px 0;
  border-bottom: 1px solid var(--color-line);
}

.section:last-child {
  border-bottom: 0;
}

.section-head {
  margin-bottom: 20px;
}

.section-title {
  font-size: 22px;
}

.section-desc,
.section-intro,
.section-lead {
  margin: 8px 0 0;
  max-width: var(--w-text);
  font-size: 15px;
  color: var(--color-muted);
}

/* 内页通用内容块 */
.content-section {
  padding: 36px 0;
  border-bottom: 1px solid var(--color-line);
}

.content-section:last-child {
  border-bottom: 0;
}

.content-section.section-alt {
  background: var(--color-soft);
  margin: 0 -24px;
  padding: 36px 24px;
  border-bottom: 1px solid var(--color-line);
}

.section-inner {
  max-width: var(--w-inner);
  margin: 0 auto;
}

/* 通用图 */
.section-media,
.content-figure,
.section-figure,
.media-figure {
  margin: 20px 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.section-media img,
.content-figure img,
.section-figure img,
.media-figure img {
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
}

.section-media figcaption,
.content-figure figcaption,
.section-figure figcaption,
.media-figure figcaption,
.figure-caption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-muted);
  background: var(--color-soft);
  border-top: 1px solid var(--color-line);
}

/* ============================================================
   components — 通用组件
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: #173d7c;
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-ghost:hover {
  background: #eef3fb;
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.data-table,
.work-table {
  width: 100%;
  min-width: 640px;
  font-size: 15px;
}

.table-caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-size: 14px;
  color: var(--color-muted);
  background: var(--color-soft);
  border-bottom: 1px solid var(--color-line);
}

.data-table th,
.data-table td,
.work-table th,
.work-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}

.data-table thead th,
.work-table thead th {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  background: var(--color-soft);
  white-space: nowrap;
}

.data-table tbody tr:last-child td,
.work-table tbody tr:last-child td {
  border-bottom: 0;
}

.cell-title {
  font-weight: 600;
  color: var(--color-text);
}

.cell-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-muted);
}

.cell-update {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-status);
}

.cell-status {
  white-space: nowrap;
}

/* 状态标记 */
.status,
.status-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

.status-ongoing,
.status-tag.is-ongoing {
  color: var(--color-status);
  background: #fdf1ea;
}

.status-done,
.status-tag.is-finished {
  color: var(--color-muted);
  background: var(--color-soft);
}

.status-pause,
.status-tag.is-intermittent {
  color: #8a5a12;
  background: #fdf6e7;
}

/* 字段解释 */
.field-notes {
  margin-top: 20px;
}

.field-notes-title {
  font-size: 17px;
  margin-bottom: 12px;
}

.field-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px 24px;
}

.field-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-muted);
}

.field-name {
  display: inline-block;
  align-self: flex-start;
  padding: 1px 8px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-soft);
}

.catalog-fields .field-list {
  display: block;
  margin-top: 18px;
}

.field-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.field-row:last-child {
  border-bottom: 0;
}

.field-row .field-name {
  background: none;
  padding: 0;
  font-size: 14px;
  color: var(--color-text);
}

.field-body {
  margin: 0;
  font-size: 15px;
  color: var(--color-muted);
}

/* 折叠问答 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.faq-question {
  padding: 14px 44px 14px 18px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-muted);
}

.faq-item[open] .faq-question::after {
  content: "–";
}

.faq-answer {
  padding: 14px 18px 16px;
  font-size: 15px;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
}

.faq-more {
  margin-top: 8px;
}

/* 相关内页入口条 */
.related-entry,
.related-links,
.section-related {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.related-entry:last-child,
.related-links:last-child {
  border-bottom: 0;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.related-item {
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.related-link {
  display: inline-block;
  font-weight: 600;
  font-size: 16px;
}

.related-desc,
.related-note {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--color-muted);
}

.related-bar {
  margin-top: 16px;
}

.related-bar .related-list {
  margin-top: 0;
}

/* ============================================================
   pages — 首页
   ============================================================ */
.hero {
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--color-line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.hero-media {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.hero-copy {
  min-width: 0;
}

.hero-copy h1 {
  font-size: 32px;
  line-height: 1.3;
}

.hero-lead {
  margin: 14px 0 22px;
  font-size: 16px;
  color: var(--color-muted);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 题材标签带 */
.theme-tags .section-desc {
  margin-bottom: 20px;
}

.tag-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.tag-item {
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.tag-item:hover {
  border-color: var(--color-accent);
  background: #f7faff;
}

.tag-link {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.tag-item:hover .tag-link {
  color: var(--color-accent);
  text-decoration: none;
}

.tag-note {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  color: var(--color-muted);
}

/* 流程条 */
.flow-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.flow-node {
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.flow-index {
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  border-radius: 50%;
}

.flow-name {
  margin-top: 12px;
  font-size: 17px;
}

.flow-text {
  margin: 8px 0 12px;
  font-size: 15px;
  color: var(--color-muted);
}

.flow-link {
  font-size: 14px;
  font-weight: 600;
}

/* 更新清单 */
.update-list .table-wrap {
  margin-top: 4px;
}

/* 题材分类入口 */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 4px;
}

.category-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease;
}

.category-card:hover {
  border-color: var(--color-accent);
}

.category-name {
  font-size: 17px;
}

.category-text {
  flex: 1 1 auto;
  margin: 8px 0 12px;
  font-size: 15px;
  color: var(--color-muted);
}

.category-link {
  font-size: 14px;
  font-weight: 600;
}

/* 手动筛选预览 */
.filter-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.filter-column {
  min-width: 0;
}

.filter-column-title {
  font-size: 17px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.filter-options,
.filter-option-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filter-options li {
  margin: 0;
}

.filter-option,
.filter-option-btn {
  display: block;
  width: 100%;
  padding: 10px 14px;
  text-align: left;
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.filter-option:hover,
.filter-option-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

.filter-result-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--color-muted);
}

/* 编辑选读 */
.pick-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.pick-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.pick-name {
  font-size: 16px;
}

.pick-text {
  margin: 8px 0 12px;
  font-size: 15px;
  color: var(--color-muted);
}

.pick-link {
  font-size: 14px;
  font-weight: 600;
}

/* 纠错说明条 */
.feedback-note {
  padding: 32px 0;
  border-bottom: 0;
}

.note-list {
  margin: 16px 0 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.note-item {
  padding: 14px 16px;
  font-size: 15px;
  color: var(--color-muted);
  background: var(--color-soft);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 0;
}

.note-link {
  font-size: 15px;
  font-weight: 600;
}

/* ============================================================
   pages — 题材目录
   ============================================================ */
.catalog-filter {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.catalog-filter .filter-columns {
  margin-top: 18px;
}

.filter-col {
  min-width: 0;
}

.filter-col-title {
  font-size: 17px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.filter-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.filter-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease;
}

.filter-item:hover {
  border-color: var(--color-accent);
}

.filter-item a {
  font-size: 15px;
  font-weight: 600;
}

.filter-desc {
  font-size: 13px;
  color: var(--color-muted);
}

.filter-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-muted);
}

.catalog-list {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.catalog-list .table-wrap {
  margin-top: 16px;
}

.table-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-muted);
}

.catalog-fields {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.catalog-distinguish {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.distinguish-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.distinguish-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.distinguish-name {
  font-size: 16px;
}

.distinguish-body {
  margin: 8px 0 12px;
  font-size: 15px;
  color: var(--color-muted);
}

.distinguish-link {
  font-size: 14px;
  font-weight: 600;
}

/* ============================================================
   pages — 阅读入门
   ============================================================ */
.step-track {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.step-node {
  position: relative;
  padding: 20px 20px 20px 64px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.step-index {
  position: absolute;
  left: 20px;
  top: 20px;
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  border-radius: 50%;
}

.step-title {
  font-size: 17px;
}

.step-text {
  margin: 8px 0 12px;
  font-size: 15px;
  color: var(--color-muted);
}

.step-link {
  font-size: 14px;
  font-weight: 600;
}

.section-order .section-figure {
  margin: 20px 0 24px;
}

.order-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.order-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.order-title {
  font-size: 17px;
}

.order-text {
  margin: 8px 0 8px;
  font-size: 15px;
  color: var(--color-muted);
}

.order-note {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
  padding-left: 14px;
  border-left: 2px solid var(--color-line);
}

/* ============================================================
   pages — 阅读方式
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 280px);
  gap: 40px;
  align-items: start;
}

.page-content {
  min-width: 0;
}

.page-aside {
  min-width: 0;
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.aside-block {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.aside-block:last-child {
  margin-bottom: 0;
}

.aside-title {
  font-size: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.entry-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.entry-item {
  margin: 0;
}

.entry-link {
  font-size: 15px;
}

.block-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.block-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.block-name {
  font-size: 16px;
}

.block-text {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--color-muted);
}

.term-list {
  margin-top: 18px;
}

.term-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.term-row:last-child {
  border-bottom: 0;
}

.term-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.term-desc {
  margin: 0;
  font-size: 15px;
  color: var(--color-muted);
}

.section-status .table-wrap {
  margin-top: 18px;
}

.section-status .data-table {
  min-width: 520px;
}

.layout-note-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.layout-note {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.layout-note-title {
  font-size: 16px;
}

.layout-note-text {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--color-muted);
}

.layout-caption {
  margin-top: 18px;
  font-size: 14px;
  color: var(--color-muted);
}

/* ============================================================
   pages — 筛选与设置
   ============================================================ */
.filter-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  margin-top: 20px;
}

.filter-column-note {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--color-muted);
}

.filter-column-topic .filter-option-list,
.filter-column-status .filter-option-list {
  margin-top: 12px;
}

.filter-option-list li {
  margin: 0;
}

.filter-option-list li a,
.filter-option-list li span {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--color-text);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.filter-option-list li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

.filter-option-desc {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--color-muted);
}

.preference-list {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.preference-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.preference-name {
  font-size: 16px;
}

.preference-detail {
  margin: 8px 0 8px;
  font-size: 15px;
  color: var(--color-muted);
}

.preference-tradeoff {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
  padding-left: 14px;
  border-left: 2px solid var(--color-line);
}

.mapping-block {
  margin-top: 18px;
}

.mapping-text {
  font-size: 15px;
  color: var(--color-muted);
}

.mapping-link-row {
  margin-top: 12px;
}

.inline-link {
  font-weight: 600;
}

/* ============================================================
   pages — 异常处理
   ============================================================ */
.faq-group {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.faq-group .faq-item {
  margin-top: 10px;
}

.faq-group .faq-item:first-of-type {
  margin-top: 18px;
}

.info-strip {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.strip-text {
  margin-top: 12px;
  font-size: 15px;
  color: var(--color-muted);
}

.info-list {
  margin: 16px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.info-list li {
  padding: 12px 16px;
  font-size: 15px;
  color: var(--color-muted);
  background: var(--color-soft);
  border-radius: var(--radius);
}

.strip-link {
  margin-top: 16px;
  font-size: 15px;
}

.page-troubleshooting .content-figure {
  max-width: var(--w-inner);
  margin: 20px auto;
}

/* ============================================================
   pages — 纠错反馈
   ============================================================ */
.feedback-types {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.feedback-type-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  margin-top: 18px;
}

.feedback-type-col {
  min-width: 0;
}

.type-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.type-item {
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.type-name {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  background: var(--color-soft);
  color: var(--color-text);
}

.type-note {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--color-muted);
}

.example-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.example-item {
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.example-label {
  display: inline-block;
  font-size: 13px;
  color: var(--color-muted);
}

.example-text {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--color-text);
}

.feedback-info {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.feedback-info .info-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.feedback-info .info-item {
  padding: 18px;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.info-title {
  font-size: 16px;
}

.info-text {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--color-muted);
}

.feedback-flow {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.flow-steps {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.flow-step {
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.feedback-flow .flow-index {
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  border-radius: 50%;
}

.flow-title {
  margin-top: 12px;
  font-size: 17px;
}

.feedback-flow .flow-text {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--color-muted);
}

.feedback-figure {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.feedback-figure .media-figure {
  margin-top: 16px;
}

/* ============================================================
   pages — 404
   ============================================================ */
.error-main {
  max-width: var(--w-inner);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.error-panel {
  max-width: 640px;
  padding: 64px 0 40px;
}

.error-code {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--color-muted);
}

.error-panel h1 {
  font-size: 28px;
}

.error-text {
  margin: 14px 0 24px;
  font-size: 16px;
  color: var(--color-muted);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.error-note {
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-muted);
}

.error-note a {
  margin-right: 12px;
}

/* ============================================================
   footer
   ============================================================ */
.site-footer {
  background: var(--color-soft);
  border-top: 1px solid var(--color-line);
}

.footer-inner {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 40px 24px 24px;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
}

.footer-col {
  min-width: 0;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.footer-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-list li {
  margin: 0;
}

.footer-list a {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

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

.footer-bottom {
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.footer-brand-note,
.footer-meta {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

/* ============================================================
   responsive
   ============================================================ */
@media (max-width: 960px) {
  .header-inner {
    padding: 0 20px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .hero-media img {
    height: 260px;
  }

  .page-hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .page-aside {
    position: static;
  }

  .filter-panel,
  .feedback-type-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .footer-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 0 16px;
    min-height: 56px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    padding: 0 16px;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 0 14px;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    display: block;
    min-height: 44px;
    line-height: 32px;
    padding: 6px 0;
    border-bottom: 1px solid var(--color-line);
  }

  .nav-link.is-current {
    border-bottom-color: var(--color-line);
  }

  .home-main,
  .inner-main,
  .site-inner,
  .error-main {
    padding: 0 16px 48px;
  }

  .hero {
    padding: 24px 0 32px;
  }

  .hero-copy h1 {
    font-size: 24px;
  }

  .hero-media img {
    height: 220px;
  }

  .page-title,
  .error-panel h1 {
    font-size: 22px;
  }

  .section,
  .content-section,
  .faq-group,
  .info-strip,
  .feedback-types,
  .feedback-info,
  .feedback-flow,
  .feedback-figure,
  .catalog-filter,
  .catalog-list,
  .catalog-fields,
  .catalog-distinguish,
  .related-entry,
  .related-links,
  .section-related {
    padding: 26px 0;
  }

  .content-section.section-alt {
    margin: 0 -16px;
    padding: 26px 16px;
  }

  .tag-strip,
  .flow-list,
  .category-grid,
  .pick-list,
  .distinguish-list,
  .block-list,
  .layout-note-list,
  .preference-list,
  .feedback-info .info-list,
  .flow-steps,
  .related-list,
  .field-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-node {
    padding: 18px;
  }

  .step-index {
    position: static;
    margin-bottom: 10px;
  }

  .field-row,
  .term-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .data-table,
  .work-table {
    min-width: 520px;
  }

  .footer-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }
}

@media (max-width: 390px) {
  .hero-copy h1 {
    font-size: 22px;
  }

  .page-title,
  .error-panel h1 {
    font-size: 20px;
  }

  .hero-actions .btn,
  .error-actions .btn {
    width: 100%;
  }

  .data-table,
  .work-table {
    min-width: 460px;
  }
}