/* ==========================================================================
   星空无限 · 企业协作服务官网 — 全站样式
   分组：base / layout / components / pages / responsive / print
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base — 变量、重置、排版基础
   -------------------------------------------------------------------------- */

:root {
  --ink: #101820;
  --ink-blue: #1e3345;
  --paper: #f2ede3;
  --paper-white: #fffdf8;
  --copper: #8a5a24;
  --copper-soft: #b07a3c;
  --line: #d7cec0;
  --line-strong: #bfb3a1;
  --muted: #5c6470;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: 1180px;
  --read: 760px;
  --radius: 6px;
  --shadow-soft: 0 1px 2px rgba(16, 24, 32, 0.06), 0 8px 22px rgba(16, 24, 32, 0.05);
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  color: var(--ink-blue);
  line-height: 1.28;
}

p {
  margin: 0;
}

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

a {
  color: var(--copper);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--ink-blue);
}

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

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
}

/* 跳转链接：默认移出视口但保留可聚焦，聚焦时完整落回视口内 */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 200;
  display: block;
  width: auto;
  max-width: calc(100% - 24px);
  padding: 10px 18px;
  background: var(--ink-blue);
  color: var(--paper-white);
  font-size: 14px;
  line-height: 1.4;
  white-space: normal;
  overflow-wrap: break-word;
  border-radius: 0 0 var(--radius) 0;
  transform: translateY(-120%);
  transition: transform 0.18s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  color: var(--paper-white);
}

/* --------------------------------------------------------------------------
   2. layout — 容器、站点骨架、页头、导航、页脚
   -------------------------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(242, 237, 227, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-blue);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand::before {
  content: "";
  width: 12px;
  height: 12px;
  border: 2px solid var(--copper);
  transform: rotate(45deg);
  flex: none;
}

.brand:hover {
  color: var(--copper);
}

.primary-nav {
  display: flex;
  align-items: center;
}

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

.site-nav li {
  display: block;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.site-nav a:hover {
  color: var(--copper);
}

.site-nav a.is-current {
  color: var(--copper);
  font-weight: 700;
  border-bottom-color: var(--copper);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-white);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink-blue);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

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

/* 页脚 */
.site-footer {
  margin-top: 64px;
  background: var(--ink-blue);
  color: #d8dee4;
  border-top: 3px solid var(--copper);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 1.6fr);
  gap: 40px 56px;
  padding-top: 52px;
  padding-bottom: 40px;
}

.footer-brand {
  max-width: 340px;
}

.footer-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--paper-white);
  letter-spacing: 0.02em;
}

.footer-slogan {
  margin-top: 6px;
  font-size: 14px;
  color: var(--copper-soft);
  letter-spacing: 0.04em;
}

.footer-intro {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: #b6c0ca;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.footer-heading {
  font-size: 13px;
  font-weight: 700;
  color: var(--paper-white);
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: #c8d1d9;
  padding: 2px 0;
}

.footer-col a:hover {
  color: var(--copper-soft);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 18px;
  padding-bottom: 26px;
}

.copyright {
  font-size: 13px;
  color: #93a0ab;
  letter-spacing: 0.02em;
}

/* --------------------------------------------------------------------------
   3. components — 通用元素、按钮、标题组、表格、文档行、入口带
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn,
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: var(--ink-blue);
  color: var(--paper-white);
}

.btn-primary:hover {
  background: var(--copper);
  color: var(--paper-white);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-blue);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  border-color: var(--copper);
  color: var(--copper);
}

/* 文本链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--copper);
}

.text-link::after {
  content: "→";
  font-size: 14px;
  transition: transform 0.18s ease;
}

.text-link:hover::after {
  transform: translateX(3px);
}

/* 首页标题组 */
.section-title {
  font-size: 30px;
  color: var(--ink-blue);
}

.section-sub {
  margin-top: 10px;
  max-width: var(--read);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.section-more {
  margin-top: 22px;
}

/* 内页标题组 */
.section-head {
  margin-bottom: 26px;
}

.section-head h2 {
  font-size: 28px;
  color: var(--ink-blue);
}

.section-head p {
  margin-top: 10px;
  max-width: var(--read);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.section-code {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--copper);
  text-transform: uppercase;
}

.section-lead {
  margin-top: 10px;
  max-width: var(--read);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px 28px 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

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

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

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

.breadcrumb-current {
  color: var(--ink-blue);
  font-weight: 700;
}

/* 页面标题区：H1 由 .page-header 承载，统一字体层级 */
.page-header {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 28px 0;
}

.page-title {
  font-size: 48px;
  line-height: 1.18;
  font-weight: 700;
  color: var(--ink-blue);
  letter-spacing: 0;
}

/* 档案编号 */
.doc-code,
.doc-number {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--copper);
  text-transform: uppercase;
}

/* 表格滚动容器 */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
}

.table-scroll table {
  min-width: 560px;
}

.table-scroll caption {
  padding: 14px 18px;
  text-align: left;
  font-size: 13px;
  color: var(--muted);
  caption-side: top;
}

.table-scroll thead th {
  padding: 14px 18px;
  text-align: left;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper-white);
  background: var(--ink-blue);
  border-bottom: 1px solid var(--ink-blue);
  white-space: nowrap;
}

.table-scroll tbody th,
.table-scroll tbody td {
  padding: 14px 18px;
  text-align: left;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  border-top: 1px solid var(--line);
  vertical-align: top;
}

.table-scroll tbody th {
  font-weight: 700;
  color: var(--ink-blue);
  background: #f7f2e8;
}

.table-scroll tbody tr:first-child th,
.table-scroll tbody tr:first-child td {
  border-top: 0;
}

/* 通用相关入口带 */
.related-rail {
  max-width: var(--wrap);
  margin: 56px auto 0;
  padding: 0 28px;
}

.related-rail h2 {
  font-size: 26px;
  color: var(--ink-blue);
}

.related-list {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.related-list li {
  display: flex;
}

.related-list a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  padding: 20px 22px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.related-list a:hover {
  border-color: var(--copper);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.related-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.related-title,
.related-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-blue);
}

.related-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   4. pages — 首页
   -------------------------------------------------------------------------- */

.home-main {
  padding-bottom: 8px;
}

/* 4.1 首屏档案封面 */
.hero-archive {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 56px;
  align-items: start;
}

.hero-text {
  max-width: 620px;
}

.hero-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--copper);
  text-transform: uppercase;
}

.hero-text h1 {
  margin-top: 16px;
  font-size: 48px;
  line-height: 1.16;
  color: var(--ink-blue);
}

.hero-lead {
  margin-top: 20px;
  max-width: 560px;
  font-size: 17px;
  line-height: 1.8;
  color: #3a4550;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-cover {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cover-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
  overflow: hidden;
}

.cover-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.cover-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.hero-index {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.hero-index li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: #3a4550;
}

.idx-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper);
  flex: none;
}

/* 4.2 当前任务三步带 */
.task-rail {
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
}

.task-list {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.task-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 24px 22px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--copper);
  border-radius: var(--radius);
}

.task-step {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--copper);
}

.task-item h3 {
  font-size: 19px;
  color: var(--ink-blue);
}

.task-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.task-item .text-link {
  margin-top: auto;
  padding-top: 6px;
}

/* 4.3 能力目录标签摘要 */
.capability-tabs {
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
}

.tabs {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.tab {
  min-height: 44px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.tab:hover {
  color: var(--copper);
  border-color: var(--copper-soft);
}

.tab.is-active {
  color: var(--paper-white);
  background: var(--ink-blue);
  border-color: var(--ink-blue);
}

.tab-panels {
  margin-top: 26px;
}

.tab-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.tab-panel[hidden] {
  display: none;
}

.tab-panel.is-active {
  display: grid;
}

.panel-col {
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel-col h3 {
  font-size: 17px;
  color: var(--ink-blue);
  margin-bottom: 10px;
}

.panel-col p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* 4.4 协作路线预览 */
.route-preview {
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
}

.route-list {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.route-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.route-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.route-item h3 {
  font-size: 17px;
  color: var(--ink-blue);
}

.route-action {
  font-size: 14px;
  line-height: 1.68;
  color: #3a4550;
}

.route-check {
  margin-top: auto;
  padding-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px dashed var(--line-strong);
}

/* 4.5 误区档案摘要 */
.misconception-digest {
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
}

.mis-list {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.mis-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.mis-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  padding-top: 3px;
}

.mis-body h3 {
  font-size: 18px;
  color: var(--ink-blue);
}

.mis-body p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* 4.6 服务边界摘要 */
.boundary-digest {
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
}

.boundary-cols {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.boundary-col {
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-col h3 {
  font-size: 17px;
  color: var(--ink-blue);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--copper);
}

.boundary-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.boundary-col li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.boundary-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border: 1px solid var(--copper-soft);
  transform: rotate(45deg);
}

/* 4.7 公开资料入口 */
.archive-entry {
  padding: 52px 0 8px;
}

.archive-grid {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 44px;
  align-items: start;
}

.archive-docs {
  min-width: 0;
}

.archive-figure {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
  overflow: hidden;
}

.archive-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.archive-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.doc-list {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.doc-list li {
  border-bottom: 1px solid var(--line);
}

.doc-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-blue);
}

.doc-link:hover {
  color: var(--copper);
}

.doc-desc {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.65;
  color: var(--muted);
}

.archive-routes {
  min-width: 0;
  padding: 24px 22px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.route-card {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.route-card:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.route-card h3 {
  font-size: 16px;
  color: var(--ink-blue);
}

.route-card p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.route-card .text-link {
  margin-top: 8px;
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   5. pages — 内页通用标题区变体
   -------------------------------------------------------------------------- */

/* 5.1 capability 标题区：左文右图 */
.page-title-cover.wrap {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 40px;
  align-items: start;
  padding-top: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.title-text {
  min-width: 0;
}

.title-lead {
  margin-top: 14px;
  font-size: 17px;
  line-height: 1.8;
  color: #3a4550;
}

.title-note {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.title-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
  overflow: hidden;
}

.title-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

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

/* 5.2 通用标题区：collaboration / boundaries 左文右图 */
.page-title-cover:not(.wrap) {
  padding: 0;
}

.title-cover-grid {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 40px;
  align-items: start;
  padding-top: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.title-cover-text {
  min-width: 0;
}

.title-cover-text .doc-number {
  display: inline-block;
}

.title-cover-text .title-lead {
  margin-top: 14px;
  font-size: 17px;
  line-height: 1.8;
  color: #3a4550;
}

.title-cover-text .title-lead + .title-lead {
  margin-top: 10px;
  font-size: 15px;
  color: var(--muted);
}

.title-cover-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
  overflow: hidden;
}

.title-cover-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

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

/* 5.3 preparation 标题区：.page-title-inner 包裹 */
.page-title-inner {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 40px;
  align-items: start;
  padding-top: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.page-title-text {
  min-width: 0;
}

.page-lead {
  margin-top: 14px;
  font-size: 17px;
  line-height: 1.8;
  color: #3a4550;
}

.page-note {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-cover {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
  overflow: hidden;
}

.page-cover img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

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

/* 5.4 misconceptions 标题区：无 wrap 包裹，直接带内边距 */
.page-title-cover .title-cover-text {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

.page-title-cover .title-summary {
  margin-top: 14px;
  font-size: 17px;
  line-height: 1.8;
  color: #3a4550;
  max-width: var(--read);
}

.page-title-cover .title-cover-figure {
  max-width: var(--wrap);
  margin: 20px auto 0;
  padding: 0 28px;
  border: 0;
  background: transparent;
  border-radius: 0;
  overflow: visible;
}

.page-title-cover .title-cover-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* 5.5 archive 标题区：.cover-text / .cover-figure 直接置于 section 内 */
.page-title-cover:has(.cover-text) {
  max-width: var(--wrap);
  margin: 24px auto 0;
  padding: 24px 28px 28px;
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  gap: 40px;
  align-items: start;
  border-bottom: 1px solid var(--line);
}

.cover-text {
  min-width: 0;
}

.cover-lead {
  margin-top: 14px;
  font-size: 17px;
  line-height: 1.8;
  color: #3a4550;
}

.cover-note {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-title-cover .cover-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
  overflow: hidden;
}

.page-title-cover .cover-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

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

/* --------------------------------------------------------------------------
   6. pages — capability 能力目录
   -------------------------------------------------------------------------- */

.topic-index {
  padding-top: 36px;
}

.topic-index h2 {
  font-size: 24px;
  color: var(--ink-blue);
}

.topic-index-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.topic-index-list li {
  display: flex;
}

.topic-index-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  width: 100%;
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-blue);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.topic-index-list a:hover {
  color: var(--copper);
  border-color: var(--copper);
}

.idx-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper);
  flex: none;
}

.capability-list {
  padding-top: 44px;
}

.capability-list h2 {
  font-size: 26px;
  color: var(--ink-blue);
}

.capability-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.capability-item:last-of-type {
  border-bottom: 1px solid var(--line);
}

.capability-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  padding-top: 4px;
}

.capability-body {
  min-width: 0;
}

.capability-body h3 {
  font-size: 21px;
  color: var(--ink-blue);
}

.capability-summary {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: #3a4550;
}

.capability-fields {
  margin: 16px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.capability-fields > div {
  min-width: 0;
  padding: 14px 16px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.capability-fields dt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--copper);
  margin-bottom: 6px;
}

.capability-fields dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.fit-table {
  padding-top: 44px;
}

.fit-table h2 {
  font-size: 26px;
  color: var(--ink-blue);
}

.fit-table .table-scroll {
  margin-top: 20px;
}

/* --------------------------------------------------------------------------
   7. pages — collaboration 协作路线
   -------------------------------------------------------------------------- */

.route-ledger {
  padding-top: 40px;
}

.ledger-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 28px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.ledger-row:last-of-type {
  border-bottom: 1px solid var(--line);
}

.ledger-id {
  min-width: 0;
  padding-right: 20px;
  border-right: 1px solid var(--line);
}

.stage-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--copper);
}

.ledger-id h3 {
  margin-top: 8px;
  font-size: 20px;
  color: var(--ink-blue);
}

.ledger-cells {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  min-width: 0;
}

.ledger-cell {
  min-width: 0;
}

.ledger-cell h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--copper);
  margin-bottom: 6px;
}

.ledger-cell p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.checkpoint-grid {
  padding-top: 48px;
}

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

.checkpoint-col {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.checkpoint-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.checkpoint-col h3 {
  margin-top: 8px;
  font-size: 18px;
  color: var(--ink-blue);
}

.checkpoint-col p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.checkpoint-link {
  margin-top: auto;
  padding-top: 12px;
  font-size: 14px;
  font-weight: 700;
}

.change-rule {
  padding-top: 48px;
}

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

.change-col {
  padding: 24px 24px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.change-col h3 {
  font-size: 18px;
  color: var(--ink-blue);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--copper);
}

.change-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.change-col li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.change-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border: 1px solid var(--copper-soft);
  transform: rotate(45deg);
}

.prep-band {
  padding-top: 48px;
}

.prep-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 28px 32px;
  background: var(--ink-blue);
  border-radius: var(--radius);
  color: var(--paper-white);
}

.prep-band-text {
  min-width: 0;
}

.prep-band-text h2 {
  font-size: 22px;
  color: var(--paper-white);
}

.prep-band-text p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.72;
  color: #c8d1d9;
  max-width: 620px;
}

.prep-band-action {
  flex: none;
}

.prep-band-action .btn-primary {
  background: var(--copper);
  white-space: nowrap;
}

.prep-band-action .btn-primary:hover {
  background: var(--copper-soft);
}

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

.related-col {
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.related-col:hover {
  border-color: var(--copper);
  box-shadow: var(--shadow-soft);
}

.related-col h3 {
  font-size: 17px;
}

.related-col h3 a {
  color: var(--ink-blue);
}

.related-col h3 a:hover {
  color: var(--copper);
}

.related-col p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   8. pages — preparation 需求校准
   -------------------------------------------------------------------------- */

.five-questions,
.prep-checklist,
.scope-table-section,
.fit-signals {
  padding-top: 44px;
}

.question-list {
  border-top: 1px solid var(--line);
}

.question-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.question-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  padding-top: 3px;
}

.question-item h3 {
  font-size: 18px;
  color: var(--ink-blue);
  grid-column: 2;
}

.question-item p {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.72;
  color: #3a4550;
}

.question-hint {
  padding: 10px 14px;
  background: #f7f2e8;
  border-left: 3px solid var(--copper-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 13px;
  color: var(--muted);
}

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

.checklist-col {
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.checklist-col h3 {
  font-size: 18px;
  color: var(--ink-blue);
}

.checklist-intro {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.checklist-items {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.checklist-items li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #3a4550;
}

.checklist-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--copper-soft);
  transform: rotate(45deg);
}

.scope-table .table-scroll {
  margin-top: 20px;
}

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

.signal-card {
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--copper);
  border-radius: var(--radius);
}

.signal-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.signal-card h3 {
  margin-top: 8px;
  font-size: 18px;
  color: var(--ink-blue);
}

.signal-card p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

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

.related-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.related-card:hover {
  border-color: var(--copper);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

.related-card .related-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.related-card h3 {
  font-size: 17px;
  color: var(--ink-blue);
}

.related-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   9. pages — misconceptions 误区档案
   -------------------------------------------------------------------------- */

.misconception-index,
.misconception-files,
.faq-list,
.correction-checklist {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 28px 0;
}

.misconception-index h2,
.misconception-files h2,
.faq-list h2,
.correction-checklist h2 {
  font-size: 26px;
  color: var(--ink-blue);
}

.index-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.index-list li {
  display: flex;
}

.index-list a {
  display: block;
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-blue);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.index-list a:hover {
  color: var(--copper);
  border-color: var(--copper);
}

.misconception-files {
  padding-top: 40px;
}

.mis-file {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.mis-file:last-of-type {
  border-bottom: 1px solid var(--line);
}

.mis-number {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  padding-top: 4px;
}

.mis-file .mis-body {
  min-width: 0;
}

.mis-file h3 {
  font-size: 20px;
  color: var(--ink-blue);
}

.mis-fields {
  margin: 14px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.mis-fields dt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--copper);
  margin-bottom: 4px;
}

.mis-fields dd {
  margin: 0 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.mis-fields dt:nth-of-type(1),
.mis-fields dd:nth-of-type(1) {
  grid-column: 1;
  grid-row: 1;
}

.mis-fields dt:nth-of-type(2),
.mis-fields dd:nth-of-type(2) {
  grid-column: 2;
  grid-row: 1;
}

.mis-fields dt:nth-of-type(3),
.mis-fields dd:nth-of-type(3) {
  grid-column: 3;
  grid-row: 1;
}

/* FAQ 折叠 */
.faq-list {
  padding-top: 44px;
}

.faq-item {
  margin-top: 14px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item summary {
  position: relative;
  padding: 16px 48px 16px 20px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-blue);
  cursor: pointer;
  list-style: none;
  min-height: 44px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--copper);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  color: var(--copper);
}

.faq-item p {
  padding: 0 20px 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

/* 纠正清单 */
.correction-checklist {
  padding-top: 44px;
}

.checklist {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.checklist li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.check-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  padding-top: 3px;
}

.check-text h3 {
  font-size: 17px;
  color: var(--ink-blue);
}

.check-text p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   10. pages — boundaries 服务边界
   -------------------------------------------------------------------------- */

.boundary-triad,
.confirmation-principles,
.change-record,
.related-band {
  padding-top: 44px;
}

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

.triad-col {
  padding: 24px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.triad-col.triad-accept {
  border-top: 4px solid var(--ink-blue);
}

.triad-col.triad-confirm {
  border-top: 4px solid var(--copper);
}

.triad-col.triad-decline {
  border-top: 4px solid var(--line-strong);
}

.triad-heading {
  font-size: 19px;
  color: var(--ink-blue);
}

.triad-note {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.triad-col ul {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.triad-col li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: #3a4550;
}

.triad-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border: 1px solid var(--copper-soft);
  transform: rotate(45deg);
}

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

.principle-item {
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.principle-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.principle-item h3 {
  margin-top: 8px;
  font-size: 18px;
  color: var(--ink-blue);
}

.principle-item p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.change-list {
  border-top: 1px solid var(--line);
}

.change-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.change-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  padding-top: 3px;
}

.change-body h3 {
  font-size: 17px;
  color: var(--ink-blue);
}

.change-body p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

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

.related-band .related-card {
  gap: 8px;
}

.related-band .related-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.related-band .related-card h3 {
  font-size: 18px;
  color: var(--ink-blue);
}

.related-band .related-card p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.related-cta {
  margin-top: auto;
  padding-top: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--copper);
}

.related-links {
  max-width: var(--wrap);
  margin: 32px auto 0;
  padding: 16px 28px 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--line);
}

.related-links-label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-blue);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-links-item:hover {
  color: var(--copper);
  border-color: var(--copper);
}

/* --------------------------------------------------------------------------
   11. pages — archive 公开资料
   -------------------------------------------------------------------------- */

.document-directory,
.glossary-table,
.reading-routes,
.numbering-note {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 28px 0;
}

.document-directory .section-head,
.glossary-table .section-head,
.reading-routes .section-head,
.numbering-note .section-head {
  margin-bottom: 22px;
}

.document-directory h2,
.glossary-table h2,
.reading-routes h2,
.numbering-note h2 {
  font-size: 26px;
  color: var(--ink-blue);
}

.doc-list .doc-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.doc-row:last-child {
  border-bottom: 1px solid var(--line);
}

.doc-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  padding-top: 3px;
}

.doc-body {
  min-width: 0;
}

.doc-body h3 {
  font-size: 18px;
}

.doc-body h3 a {
  color: var(--ink-blue);
}

.doc-body h3 a:hover {
  color: var(--copper);
}

.doc-purpose {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.glossary-table .table-scroll {
  margin-top: 4px;
}

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

.route-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.reading-routes .route-card {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.reading-routes .route-card h3 {
  margin-top: 8px;
  font-size: 18px;
  color: var(--ink-blue);
}

.route-audience {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.route-steps {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.route-steps li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.65;
  color: #3a4550;
}

.route-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--copper-soft);
  transform: rotate(45deg);
}

.route-steps a {
  color: var(--ink-blue);
  font-weight: 700;
}

.route-steps a:hover {
  color: var(--copper);
}

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

.numbering-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 18px 16px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.num-tag {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 28px;
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper-white);
  background: var(--ink-blue);
  border-radius: 3px;
}

.numbering-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   12. pages — 404
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 72px 0 40px;
}

.error-panel {
  max-width: 640px;
  text-align: left;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.error-panel h1 {
  margin-top: 12px;
  font-size: 40px;
  color: var(--ink-blue);
  line-height: 1.2;
}

.error-lead {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.error-links {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.error-links a {
  display: flex;
  align-items: center;
  min-height: 46px;
  padding: 0 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-blue);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-links a:hover {
  color: var(--copper);
  border-color: var(--copper);
}

.error-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  margin-top: 26px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper-white);
  background: var(--ink-blue);
  border-radius: var(--radius);
}

.error-home:hover {
  background: var(--copper);
  color: var(--paper-white);
}

/* --------------------------------------------------------------------------
   13. responsive — 960px / 720px / 480px 断点
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .wrap,
  .header-inner,
  .breadcrumb,
  .page-header,
  .related-rail,
  .misconception-index,
  .misconception-files,
  .faq-list,
  .correction-checklist,
  .document-directory,
  .glossary-table,
  .reading-routes,
  .numbering-note,
  .related-links {
    padding-left: 22px;
    padding-right: 22px;
  }

  .header-inner {
    min-height: 64px;
  }

  /* 移动导航：按钮显示，列表默认收起 */
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    background: var(--paper-white);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(16, 24, 32, 0.08);
    padding: 8px 22px 16px;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav a {
    display: flex;
    min-height: 48px;
    padding: 0 6px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav li:last-child a {
    border-bottom: 0;
  }

  .site-nav a.is-current {
    border-bottom-color: var(--line);
    border-left: 3px solid var(--copper);
    padding-left: 12px;
  }

  /* 首屏 */
  .hero-archive {
    padding: 40px 0 36px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .hero-text {
    max-width: none;
  }

  .hero-text h1 {
    font-size: 38px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .cover-figure img {
    height: 260px;
  }

  /* 三步 */
  .task-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  /* 标签面板 */
  .tab-panel,
  .tab-panel.is-active {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  /* 路线 */
  .route-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  /* 边界 */
  .boundary-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  /* 公开资料 */
  .archive-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  /* 内页标题区：文字在前，图片在后 */
  .page-title-cover.wrap,
  .title-cover-grid,
  .page-title-inner,
  .page-title-cover:has(.cover-text) {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .page-title {
    font-size: 38px;
  }

  .title-figure img,
  .title-cover-figure img,
  .page-cover img,
  .page-title-cover .cover-figure img {
    height: 240px;
  }

  .page-title-cover .title-cover-figure {
    padding: 0 22px;
  }

  .page-title-cover .title-cover-figure img {
    height: 240px;
  }

  /* capability */
  .topic-index-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .capability-item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 16px;
  }

  .capability-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* collaboration 阶段账本 */
  .ledger-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .ledger-id {
    padding-right: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-bottom: 12px;
  }

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

  .checkpoint-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .change-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .prep-band-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 24px;
  }

  .related-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  /* preparation */
  .checklist-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .signals-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .related-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  /* misconceptions */
  .index-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mis-file {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 16px;
  }

  .mis-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .mis-fields dt:nth-of-type(1),
  .mis-fields dd:nth-of-type(1),
  .mis-fields dt:nth-of-type(2),
  .mis-fields dd:nth-of-type(2),
  .mis-fields dt:nth-of-type(3),
  .mis-fields dd:nth-of-type(3) {
    grid-column: auto;
    grid-row: auto;
  }

  /* boundaries */
  .triad-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .principles-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

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

  /* archive */
  .route-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .numbering-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* 页脚 */
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding-top: 40px;
    padding-bottom: 32px;
  }

  .footer-brand {
    max-width: none;
  }

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

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .wrap,
  .header-inner,
  .breadcrumb,
  .page-header,
  .related-rail,
  .misconception-index,
  .misconception-files,
  .faq-list,
  .correction-checklist,
  .document-directory,
  .glossary-table,
  .reading-routes,
  .numbering-note,
  .related-links {
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand {
    font-size: 18px;
  }

  .section-title,
  .section-head h2,
  .topic-index h2,
  .capability-list h2,
  .fit-table h2,
  .misconception-index h2,
  .misconception-files h2,
  .faq-list h2,
  .correction-checklist h2,
  .document-directory h2,
  .glossary-table h2,
  .reading-routes h2,
  .numbering-note h2,
  .related-rail h2 {
    font-size: 24px;
  }

  .hero-text h1 {
    font-size: 30px;
    line-height: 1.24;
  }

  .page-title {
    font-size: 30px;
    line-height: 1.2;
  }

  .hero-lead,
  .title-lead,
  .page-lead,
  .cover-lead,
  .page-title-cover .title-summary {
    font-size: 16px;
  }

  .cover-figure img,
  .title-figure img,
  .title-cover-figure img,
  .page-cover img,
  .page-title-cover .cover-figure img,
  .archive-figure img {
    height: 210px;
  }

  .hero-archive,
  .task-rail,
  .capability-tabs,
  .route-preview,
  .misconception-digest,
  .boundary-digest,
  .archive-entry {
    padding-top: 36px;
    padding-bottom: 36px;
  }

  .tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 10px;
    -webkit-overflow-scrolling: touch;
  }

  .tab {
    flex: none;
    min-height: 44px;
    padding: 0 14px;
    font-size: 13px;
  }

  .route-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .mis-row {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 12px;
  }

  .topic-index-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .index-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .capability-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .capability-code {
    padding-top: 0;
  }

  .ledger-cells {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .question-item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 12px;
  }

  .mis-file {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .mis-number {
    padding-top: 0;
  }

  .checklist li,
  .change-item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
  }

  .doc-list .doc-row {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 12px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 18px;
  }

  .error-main {
    padding: 48px 0 24px;
  }

  .error-panel h1 {
    font-size: 30px;
  }

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

  .table-scroll table {
    min-width: 520px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .prep-band-action {
    width: 100%;
  }

  .prep-band-action .btn-primary {
    width: 100%;
  }

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

  .related-links {
    flex-direction: column;
    align-items: stretch;
  }

  .related-links-item {
    justify-content: center;
  }
}

/* --------------------------------------------------------------------------
   14. print — 简化输出
   -------------------------------------------------------------------------- */

@media print {
  body {
    background: #ffffff;
    color: #000000;
  }

  .site-header,
  .primary-nav,
  .nav-toggle,
  .skip-link,
  .footer-nav,
  .breadcrumb,
  .hero-actions,
  .section-more,
  .prep-band,
  .related-rail,
  .related-band,
  .related-links,
  .related-grid,
  .related-cols,
  .related-list {
    display: none !important;
  }

  .site-footer {
    margin-top: 24px;
    background: transparent;
    color: #000000;
    border-top: 1px solid #999999;
  }

  .footer-logo,
  .footer-slogan,
  .footer-intro,
  .copyright {
    color: #000000;
  }

  .footer-brand::after {
    content: "来源：74url.com";
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: #333333;
  }

  a {
    color: #000000;
    text-decoration: none;
  }

  .wrap,
  .header-inner,
  .page-title-cover,
  .page-title-cover:has(.cover-text) {
    max-width: 100%;
    padding-left: 0;
    padding-right: 0;
  }

  .cover-figure img,
  .title-figure img,
  .title-cover-figure img,
  .page-cover img,
  .archive-figure img {
    max-height: 220px;
    object-fit: cover;
  }
}