:root {
  --ink: #14161c;
  --ink-soft: #232733;
  --paper: #f4f1ea;
  --accent: #e8543f;
  --muted: #8f9aa8;
  --line: rgba(244, 241, 234, 0.16);
  --line-dark: rgba(20, 22, 28, 0.14);
  --radius: 6px;
  --wrap: 1200px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "Roboto Mono", Menlo, Consolas, monospace;
}

/* ==========================================================================
   base
   ========================================================================== */

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.32;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
}

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

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

dl,
dd,
dt {
  margin: 0;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover,
a:focus-visible {
  color: #c93f2c;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

figure {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

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

/* ==========================================================================
   layout · 全站骨架
   ========================================================================== */

.site-body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.inner-main {
  padding-top: 24px;
}

/* --- 页头 --- */

.site-header {
  background-color: var(--ink);
  color: var(--paper);
}

.site-header .header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.site-header .brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--paper);
  text-decoration: none;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
}

.site-header .brand:hover,
.site-header .brand:focus-visible {
  color: var(--paper);
}

.site-header .brand-note {
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.4;
}

.site-header .nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 11px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
}

.site-header .nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--paper);
  border-radius: 2px;
}

.site-header .site-nav {
  margin-left: auto;
}

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

.site-header .nav-list a {
  display: inline-block;
  padding: 8px 12px;
  min-height: 44px;
  line-height: 28px;
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.site-header .nav-list a:hover,
.site-header .nav-list a:focus-visible {
  color: var(--accent);
}

.site-header .nav-list a.is-current {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.site-header .header-fact {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 12px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

/* --- 页脚 --- */

.site-footer {
  background-color: var(--ink);
  color: var(--paper);
  padding: 48px 24px 28px;
  margin-top: auto;
}

.site-footer .footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.site-footer .footer-title {
  font-size: 15px;
  color: var(--paper);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.site-footer .footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer .footer-list a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  line-height: 1.6;
}

.site-footer .footer-list a:hover,
.site-footer .footer-list a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.site-footer .footer-brand {
  max-width: var(--wrap);
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.site-footer .footer-copy {
  max-width: var(--wrap);
  margin: 8px auto 0;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

/* --- 内页面包屑与标题区 --- */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  padding: 4px 0 16px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

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

.breadcrumb .breadcrumb-current {
  color: var(--ink);
  font-weight: 600;
}

.page-header {
  padding: 0 0 28px;
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: 36px;
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: #4a4f5a;
  max-width: 760px;
  margin: 0;
}

.page-description a {
  color: var(--accent);
}

/* --- 内页两栏布局：主内容在前，aside 在后 --- */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

.page-layout .main-column,
.page-layout .content-main,
.page-layout .content-column,
.page-layout .layout-main {
  min-width: 0;
}

.page-layout .side-column,
.page-layout .content-aside,
.page-layout .layout-aside {
  min-width: 0;
}

/* ==========================================================================
   components · 通用模块
   ========================================================================== */

.section {
  margin-bottom: 56px;
}

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

.section-head {
  margin-bottom: 24px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}

.section-desc,
.section-intro,
.section-lead {
  font-size: 15px;
  color: #4a4f5a;
  max-width: 760px;
  margin: 0;
}

.section-more {
  margin-top: 20px;
  font-size: 15px;
}

.section-more a {
  font-weight: 600;
}

.section-note {
  margin-top: 18px;
  font-size: 14px;
  color: #4a4f5a;
}

.section-note a {
  margin-right: 14px;
}

/* --- 按钮 --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #c93f2c;
  border-color: #c93f2c;
  color: #fff;
}

.btn-ghost {
  background-color: transparent;
  color: var(--paper);
  border-color: rgba(244, 241, 234, 0.5);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: rgba(244, 241, 234, 0.12);
  color: var(--paper);
  border-color: var(--paper);
}

/* --- 图片容器统一约束 --- */

.hero-figure,
.media-figure,
.media,
.work-figure,
.content-figure,
.records-media,
.scene-figure {
  overflow: hidden;
  border-radius: var(--radius);
  background-color: var(--ink-soft);
}

.hero-figure img,
.media-figure img,
.media img,
.work-figure img,
.content-figure img,
.records-media img,
.scene-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-figure figcaption,
.media-figure figcaption,
.media figcaption,
.work-figure figcaption,
.content-figure figcaption,
.records-media figcaption,
.scene-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  background-color: var(--ink);
  line-height: 1.6;
}

/* --- 标签 --- */

.tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  line-height: 1.6;
}

.tag-period {
  background-color: var(--accent);
  color: #fff;
}

.tag-direction {
  background-color: rgba(20, 22, 28, 0.08);
  color: var(--ink);
}

/* --- 侧栏块（about / work / archive / records 共用） --- */

.side-block,
.aside-block {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

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

.side-title,
.aside-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-dark);
}

.side-list,
.aside-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.side-list a,
.aside-list a {
  display: block;
  min-height: 32px;
  font-size: 14px;
  color: #3a3f4a;
  text-decoration: none;
  line-height: 1.6;
  padding: 4px 0;
}

.side-list a:hover,
.side-list a:focus-visible,
.aside-list a:hover,
.aside-list a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.aside-text {
  font-size: 14px;
  color: #4a4f5a;
  line-height: 1.7;
  margin: 0;
}

/* --- 字段口径对照表（首页 role=table / 归档页 dl） --- */

.field-table {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: #fff;
}

.field-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  border-bottom: 1px solid var(--line-dark);
}

.field-row:last-child {
  border-bottom: none;
}

.field-row-head {
  background-color: var(--ink-soft);
}

.field-row-head .field-name,
.field-row-head .field-desc {
  color: var(--paper);
  font-weight: 700;
}

.field-name,
.field-desc {
  padding: 12px 16px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

.field-name {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink);
  border-right: 1px solid var(--line-dark);
  background-color: rgba(20, 22, 28, 0.03);
}

.field-desc {
  color: #3a3f4a;
}

/* ==========================================================================
   pages · 首页
   ========================================================================== */

.home-main {
  padding-top: 32px;
}

/* --- 时间归档首屏 --- */

.hero-section {
  background-color: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 40px;
  margin-bottom: 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 40px;
  align-items: start;
}

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

.hero-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 18px;
}

.hero-lead {
  font-size: 15px;
  color: rgba(244, 241, 234, 0.78);
  margin-bottom: 14px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

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

.hero-figure {
  margin-bottom: 20px;
}

.hero-figure img {
  aspect-ratio: 4 / 3;
}

.period-strip {
  background-color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.period-strip-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 10px;
}

.period-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.period-item {
  min-width: 0;
}

.period-item a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.period-item a:hover,
.period-item a:focus-visible {
  background-color: rgba(232, 84, 63, 0.16);
  border-color: var(--accent);
  color: var(--paper);
}

.period-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.period-name {
  font-size: 14px;
}

/* --- 机构定位与主要工作方向总览 --- */

.direction-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.direction-card,
.direction-cell {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

.direction-card:hover,
.direction-cell:hover {
  border-color: var(--accent);
  border-top-color: var(--accent);
}

.direction-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.direction-scope {
  font-size: 14px;
  color: #3a3f4a;
  margin-bottom: 8px;
}

.direction-note,
.direction-output {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

/* --- 公开内容速览与发展记录并列区 --- */

.twin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.twin-col {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 24px;
  min-width: 0;
}

.twin-heading {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-dark);
}

.archive-preview {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.archive-item {
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line-dark);
}

.archive-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.archive-item .tag {
  margin-right: 6px;
}

.archive-link {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}

.archive-link:hover,
.archive-link:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.archive-summary {
  margin: 6px 0 0;
  font-size: 14px;
  color: #4a4f5a;
}

.timeline-preview {
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-left: 2px solid var(--line-dark);
  padding-left: 18px;
}

.timeline-preview .timeline-node {
  position: relative;
}

.timeline-preview .timeline-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--accent);
}

.node-date {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}

.node-text {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.twin-more {
  margin-top: 18px;
  font-size: 14px;
}

.twin-more a {
  font-weight: 600;
}

/* --- 合作路径三步说明 --- */

.step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.step-card {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 22px;
  min-width: 0;
}

.step-no {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.step-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.step-text {
  font-size: 14px;
  color: #3a3f4a;
  margin-bottom: 12px;
}

.step-link {
  margin: 0;
  font-size: 14px;
}

.step-link a {
  font-weight: 600;
}

/* --- 站内栏目索引 --- */

.site-index {
  background-color: var(--ink-soft);
  border-radius: var(--radius);
  padding: 24px;
}

.index-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.index-item {
  min-width: 0;
}

.index-item a {
  display: block;
  min-height: 44px;
  padding: 14px 16px;
  background-color: rgba(244, 241, 234, 0.06);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.index-item a:hover,
.index-item a:focus-visible {
  background-color: rgba(232, 84, 63, 0.18);
  border-color: var(--accent);
  color: var(--paper);
}

.index-note {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}

/* --- 首页媒体区 --- */

.media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.media-figure img {
  aspect-ratio: 16 / 10;
}

/* ==========================================================================
   pages · 机构介绍
   ========================================================================== */

.section-positioning p {
  font-size: 16px;
  color: #2c313b;
  margin-bottom: 1em;
}

.media-narrow {
  margin: 24px 0;
  max-width: 560px;
}

.media-narrow img {
  aspect-ratio: 3 / 2;
}

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

.direction-item {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.direction-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.direction-item p {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.compare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 20px 0;
}

.compare-col {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 18px;
  background-color: #fff;
}

.compare-col-yes {
  border-top: 3px solid var(--accent);
}

.compare-col-no {
  border-top: 3px solid var(--muted);
}

.compare-col h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.compare-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.compare-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: #3a3f4a;
  line-height: 1.7;
}

.compare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background-color: var(--accent);
}

.compare-col-no .compare-list li::before {
  background-color: var(--muted);
}

.audience-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.audience-col {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

.audience-col h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.audience-col p {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.section-records-entry p {
  font-size: 15px;
  color: #3a3f4a;
}

/* ==========================================================================
   pages · 主要工作
   ========================================================================== */

.section-overview .direction-grid {
  margin-top: 20px;
}

.work-block {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 24px;
}

.work-block-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
}

.work-figure {
  margin-bottom: 16px;
}

.work-figure img {
  aspect-ratio: 16 / 9;
}

.work-block-text {
  font-size: 15px;
  color: #2c313b;
  margin-bottom: 16px;
}

.work-meta {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line-dark);
}

.work-meta dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  font-family: var(--font-mono);
}

.work-meta dd {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.mapping-table {
  margin-top: 20px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: #fff;
}

.mapping-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  background-color: rgba(20, 22, 28, 0.03);
  border-bottom: 1px solid var(--line-dark);
}

.mapping-table th,
.mapping-table td {
  padding: 12px 16px;
  font-size: 14px;
  text-align: left;
  border-bottom: 1px solid var(--line-dark);
  vertical-align: top;
  line-height: 1.7;
}

.mapping-table thead th {
  background-color: var(--ink-soft);
  color: var(--paper);
  font-weight: 700;
}

.mapping-table tbody tr:last-child th,
.mapping-table tbody tr:last-child td {
  border-bottom: none;
}

.mapping-table tbody th {
  font-weight: 600;
  color: var(--ink);
  width: 220px;
}

.mapping-table td {
  color: #3a3f4a;
}

.exclude-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 18px;
}

.exclude-list li {
  position: relative;
  padding: 12px 16px 12px 40px;
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  font-size: 14px;
  color: #3a3f4a;
  line-height: 1.7;
}

.exclude-list li::before {
  content: "—";
  position: absolute;
  left: 16px;
  top: 12px;
  color: var(--muted);
  font-weight: 700;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ==========================================================================
   pages · 公开内容
   ========================================================================== */

.archive-index .section-intro,
.archive-filter .section-intro,
.archive-method .section-intro {
  margin-bottom: 20px;
}

.period-group {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

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

.period-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line-dark);
}

.period-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background-color: var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
}

.period-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.period-note {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

.entry-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.entry-item {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line-dark);
}

.entry-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.entry-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 1px 7px;
  margin-right: 8px;
}

.entry-title {
  display: inline;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.entry-summary {
  margin: 6px 0 0;
  font-size: 14px;
  color: #4a4f5a;
}

.content-figure {
  margin: 32px 0;
}

.content-figure img {
  aspect-ratio: 16 / 9;
}

.direction-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.direction-tag {
  min-width: 0;
}

.direction-tag a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 6px 14px;
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.direction-tag a:hover,
.direction-tag a:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.tag-count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.archive-method .step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 18px;
}

.archive-method .step-item {
  position: relative;
  padding: 16px 18px 16px 56px;
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
}

.archive-method .step-num {
  position: absolute;
  left: 18px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
}

.archive-method .step-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.archive-method .step-desc {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.method-note {
  margin-top: 18px;
  font-size: 14px;
  color: #4a4f5a;
}

.content-aside .field-table {
  background-color: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
}

.content-aside .field-name {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  padding: 8px 0 2px;
  background-color: transparent;
  border-right: none;
}

.content-aside .field-value {
  font-size: 14px;
  color: #4a4f5a;
  padding: 0 0 12px;
  border-bottom: 1px dashed var(--line-dark);
  margin: 0;
}

.content-aside .field-table .field-value:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.aside-list-item {
  font-size: 14px;
  color: #4a4f5a;
  line-height: 1.7;
}

/* ==========================================================================
   pages · 发展记录
   ========================================================================== */

.records-timeline .section-lead,
.records-detail .section-lead,
.records-scope .section-lead {
  margin-bottom: 22px;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--line-dark);
  padding-left: 24px;
}

.timeline-list .timeline-node {
  position: relative;
  padding-bottom: 26px;
}

.timeline-list .timeline-node:last-child {
  padding-bottom: 0;
}

.timeline-list .timeline-node::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--accent);
  border: 2px solid var(--paper);
}

.timeline-list .node-date {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}

.timeline-list .node-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.timeline-list .node-desc {
  font-size: 14px;
  color: #3a3f4a;
  margin-bottom: 8px;
}

.timeline-list .node-link {
  font-size: 14px;
  font-weight: 600;
}

.records-media {
  margin-bottom: 28px;
}

.records-media img {
  aspect-ratio: 16 / 9;
}

.node-block {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-dark);
}

.node-block:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.node-block-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}

.node-block p {
  font-size: 15px;
  color: #2c313b;
  margin-bottom: 10px;
}

.node-block-link {
  font-size: 14px;
  margin: 0;
}

.node-block-link a {
  font-weight: 600;
}

.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}

.scope-col {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

.scope-col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scope-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: #3a3f4a;
  line-height: 1.7;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background-color: var(--accent);
}

.scope-note {
  margin-top: 18px;
  font-size: 14px;
  color: #4a4f5a;
}

/* ==========================================================================
   pages · 合作路径
   ========================================================================== */

.section-steps .step-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.section-steps .step-item {
  position: relative;
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 20px 20px 20px 20px;
  min-width: 0;
}

.section-steps .step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-steps .step-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.section-steps .step-desc {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 18px;
}

.check-item {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.check-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.check-desc {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.scene-figure {
  margin-bottom: 24px;
}

.scene-figure img {
  aspect-ratio: 16 / 9;
}

.scene-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.scene-col {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

.scene-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.scene-desc {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.entry-card {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px;
  min-width: 0;
}

.entry-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.entry-desc {
  font-size: 14px;
  color: #3a3f4a;
  margin: 0;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 0;
}

.faq-q {
  cursor: pointer;
  padding: 14px 40px 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  min-height: 44px;
  display: flex;
  align-items: center;
}

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

.faq-q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}

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

.faq-a {
  padding: 0 16px 16px;
  margin: 0;
  font-size: 14px;
  color: #3a3f4a;
  line-height: 1.75;
}

.aside-link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-link-list a {
  display: block;
  min-height: 32px;
  padding: 4px 0;
  font-size: 14px;
  color: #3a3f4a;
  text-decoration: none;
  line-height: 1.6;
}

.aside-link-list a:hover,
.aside-link-list a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 96px;
}

.error-panel {
  max-width: 620px;
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 56px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 30px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
}

.error-lead {
  font-size: 16px;
  color: #4a4f5a;
  margin-bottom: 28px;
}

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

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  background-color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.error-btn:hover,
.error-btn:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.error-link {
  color: var(--accent);
}

/* ==========================================================================
   responsive · 移动端任务导航
   ========================================================================== */

.task-nav,
.tab-nav {
  display: none;
}

.task-nav-list,
.tab-nav-list {
  display: flex;
  align-items: stretch;
}

.task-nav-list li,
.tab-nav-list li {
  flex: 1 1 0;
  min-width: 0;
}

.task-nav-list a,
.tab-nav-list a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 6px 4px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  text-align: center;
  line-height: 1.3;
}

.task-nav-list a.is-current,
.tab-nav-list a.is-current {
  color: var(--accent);
  background-color: rgba(232, 84, 63, 0.1);
}

/* ==========================================================================
   responsive · 断点
   ========================================================================== */

@media (max-width: 1080px) {
  .index-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

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

  .hero-section {
    padding: 32px 24px;
  }

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

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

  .section-steps .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 900px) {
  .site-header .nav-toggle {
    display: flex;
  }

  .site-header .site-nav {
    flex-basis: 100%;
    margin-left: 0;
  }

  .site-header .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 8px;
    border-top: 1px solid var(--line);
  }

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

  .site-header .nav-list a {
    display: block;
    padding: 12px 4px;
    border-bottom: 1px solid var(--line);
  }

  .site-header .nav-list li:last-child a {
    border-bottom: none;
  }

  .site-header .nav-list a.is-current {
    border-bottom-color: var(--accent);
  }

  .site-main {
    padding-bottom: 88px;
  }

  .task-nav,
  .tab-nav {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    background-color: var(--ink);
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 720px) {
  .site-main {
    padding-left: 18px;
    padding-right: 18px;
  }

  .site-header .header-inner,
  .site-header .header-fact {
    padding-left: 18px;
    padding-right: 18px;
  }

  .site-footer {
    padding-left: 18px;
    padding-right: 18px;
  }

  .page-title {
    font-size: 26px;
  }

  .section-title {
    font-size: 20px;
  }

  .hero-title {
    font-size: 26px;
  }

  .hero-section {
    padding: 24px 18px;
  }

  .step-grid,
  .section-steps .step-list,
  .audience-columns,
  .scene-columns,
  .entry-grid,
  .compare-columns,
  .scope-columns,
  .media-grid,
  .index-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .field-name {
    border-right: none;
    border-bottom: 1px solid var(--line-dark);
    padding-bottom: 6px;
  }

  .field-desc {
    padding-top: 8px;
  }

  .mapping-table thead {
    display: none;
  }

  .mapping-table tbody th,
  .mapping-table tbody td {
    display: block;
    width: auto;
  }

  .mapping-table tbody th {
    border-bottom: none;
    padding-bottom: 4px;
  }

  .mapping-table tbody td {
    padding-top: 0;
  }

  .work-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .work-meta dd {
    margin-bottom: 10px;
  }

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

  .error-main {
    padding: 56px 18px 72px;
  }

  .error-code {
    font-size: 44px;
  }

  .error-panel h1 {
    font-size: 24px;
  }
}

@media (max-width: 400px) {
  .task-nav-list a,
  .tab-nav-list a {
    font-size: 12px;
    padding: 6px 2px;
  }

  .period-item a {
    width: 100%;
    justify-content: flex-start;
  }

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