:root {
  --paper: #f4f0e4;
  --ink: #18251f;
  --ink-soft: #3d4b43;
  --green: #2f6f4e;
  --green-dark: #23553b;
  --orange: #d9772e;
  --mint: #dbe2d3;
  --line: #a7b29f;
  --paper-deep: #ece7d7;
  --white: #fbf8ef;
  --mono: "JetBrains Mono", "Noto Sans Mono CJK SC", "Courier New", monospace;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --shell: 1180px;
  --radius: 6px;
}

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

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

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

body.site-body {
  margin: 0;
  background-color: var(--paper);
  background-image: linear-gradient(180deg, #f6f2e7 0, #f4f0e4 260px);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--green-dark);
  text-decoration: none;
  text-underline-offset: 3px;
}

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

h1,
h2,
h3,
h4 {
  margin: 0 0 0.5em;
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
}

h2 {
  font-size: clamp(22px, 2.6vw, 28px);
}

h3 {
  font-size: 18px;
}

p {
  margin: 0 0 1em;
}

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

dl,
dd {
  margin: 0;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  cursor: pointer;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 60;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
  color: var(--paper);
  text-decoration: none;
}

/* ========== layout ========== */

.site-header {
  position: relative;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

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

.header-sub {
  background: var(--mint);
  border-top: 1px solid var(--line);
}

.sub-nav {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.sub-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.site-main {
  display: block;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.inner-main {
  padding-top: 20px;
}

.home-main {
  padding-top: 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 0 6px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

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

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px 24px 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-header {
  padding: 8px 0 4px;
}

.page-title {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  font-weight: 700;
  color: var(--ink);
}

.page-hero {
  padding: 6px 0 22px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 28px;
}

.page-kicker,
.eyebrow {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--green);
}

.page-lead {
  max-width: 68ch;
  margin: 0;
  font-size: 16px;
  color: var(--ink-soft);
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

.page-layout.serials-layout {
  grid-template-columns: 232px minmax(0, 1fr) 260px;
  gap: 28px;
}

.site-footer {
  background: var(--ink);
  color: #d8dfd3;
  margin-top: 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-col h2 {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #f4f0e4;
}

.footer-col p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: #c3ccbd;
}

.footer-note {
  font-size: 13px;
  color: #9dab97;
}

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

.footer-col a {
  color: #d8dfd3;
  font-size: 14px;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: #f0b070;
}

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px 24px 28px;
  border-top: 1px solid #35473c;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer-copy {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: #93a28d;
}

/* ========== components ========== */

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
  color: var(--ink);
}

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

.brand-mark {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark::after {
  content: "_";
  color: var(--green);
}

.brand-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--green);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 6px;
  white-space: nowrap;
}

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

.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--ink);
}

.primary-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

.nav-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 14px;
  font-size: 15px;
  color: var(--ink);
  border-radius: var(--radius);
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background: var(--mint);
  text-decoration: none;
  color: var(--ink);
}

.nav-list a.is-current {
  background: var(--ink);
  color: var(--paper);
}

.sub-nav-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 2px 12px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.sub-nav-list a:hover,
.sub-nav-list a:focus-visible {
  color: var(--green-dark);
  text-decoration: underline;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  transition: background-color 0.16s ease, color 0.16s ease;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--green-dark);
  border-color: var(--green-dark);
  color: var(--paper);
  text-decoration: none;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--mint);
  color: var(--ink);
  text-decoration: none;
}

.section-intro,
.section-lead,
.section-note,
.section-desc {
  max-width: 70ch;
  margin: 0 0 20px;
  font-size: 15px;
  color: var(--ink-soft);
}

.section-note {
  font-size: 14px;
}

.section-desc {
  margin-bottom: 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 24px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
}

table.data-table,
table.book-table,
table.status-table,
table.field-table {
  width: 100%;
  font-size: 14px;
  line-height: 1.6;
  background: var(--white);
}

.data-table th,
.data-table td,
.book-table th,
.book-table td,
.status-table th,
.status-table td,
.field-table th,
.field-table td {
  padding: 11px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.data-table thead th,
.book-table thead th,
.status-table thead th,
.field-table thead th {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
  background: var(--mint);
  border-bottom: 2px solid var(--ink);
  white-space: nowrap;
}

.data-table tbody tr:hover,
.book-table tbody tr:hover {
  background: #f0ecdd;
}

.table-scroll,
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

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

.table-caption,
.status-table caption,
.field-table caption {
  caption-side: top;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 12px;
  text-align: left;
  color: var(--ink-soft);
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
}

.tag,
.status-tag,
.filter-tag,
.log-tag,
.feedback-tag,
.tag-version,
.tag-status {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 2px 9px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.4;
  color: var(--green-dark);
  background: var(--mint);
  border: 1px solid var(--line);
  border-radius: 3px;
  white-space: nowrap;
}

.status-tag {
  color: var(--green-dark);
  background: #e6efe2;
}

.tag-version {
  color: #6b3d13;
  background: #f6e5d2;
  border-color: #e2bd93;
}

.tag-status {
  color: var(--green-dark);
}

.filter-tag.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.filter-tag.is-active:hover {
  color: var(--paper);
}

.status-ongoing {
  color: var(--green-dark);
}

.status-finished {
  color: #4a5a51;
}

.status-revise {
  color: #8a4a13;
}

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

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

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 48px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 18px;
  color: var(--green);
}

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--line);
}

.faq-item p {
  margin: 0;
  padding: 12px 16px 16px;
  font-size: 15px;
  color: var(--ink-soft);
}

.field-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  font-size: 14px;
}

.field-list dt {
  padding-top: 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
}

.field-list dd {
  padding: 2px 0 10px;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--line);
}

.field-list dt:last-of-type + dd {
  border-bottom: 0;
}

.version-card {
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--green);
  border-radius: var(--radius);
}

.version-card h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 16px;
}

.version-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  margin: 0 0 14px;
  font-size: 14px;
}

.version-meta dt {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
}

.version-meta dd {
  color: var(--ink);
}

.version-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 0;
  font-size: 14px;
}

.aside-help {
  margin: 18px 0 0;
  font-size: 14px;
}

.aside-help a + a {
  margin-left: 16px;
}

.aside-card {
  padding: 20px;
  margin-bottom: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-card h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 15px;
}

.aside-note {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--ink-soft);
}

.aside-list,
.aside-link-list,
.side-link-list,
.version-switch-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}

.aside-list li,
.aside-link-list li,
.side-link-list li,
.version-switch-list li {
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.aside-list li:last-child,
.aside-link-list li:last-child,
.side-link-list li:last-child,
.version-switch-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.aside-card-note {
  background: var(--paper-deep);
  border-color: var(--line);
}

.inline-link {
  font-size: 14px;
  font-weight: 700;
}

/* ========== pages ========== */

/* 首页 - 首屏选书工作台 */
.hero-workbench {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 44px;
  align-items: center;
  padding: 48px 0 40px;
  border-bottom: 2px solid var(--ink);
}

.hero-eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 3px 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--green-dark);
  background: var(--mint);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.hero-text h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4.6vw, 48px);
  line-height: 1.22;
  font-weight: 700;
}

.hero-lead {
  max-width: 46ch;
  margin: 0 0 24px;
  font-size: 17px;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.hero-duties {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.hero-duties li {
  position: relative;
  padding-left: 22px;
}

.hero-duties li::before {
  content: "▸";
  position: absolute;
  left: 2px;
  color: var(--green);
}

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

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
}

.status-dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  background: var(--green);
  border-radius: 50%;
}

/* 首页 - 主任务三入口 */
.task-entries {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

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

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

.task-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.task-card p {
  flex-grow: 1;
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--ink-soft);
}

.task-link {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
}

.task-link::after {
  content: " →";
}

/* 首页 - 书目索引工作区 */
.index-workbench {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.workbench-grid {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr) 240px;
  gap: 24px;
  align-items: start;
}

.filter-panel,
.table-panel,
.field-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.panel-title {
  margin: 0 0 14px;
  padding-bottom: 8px;
  font-family: var(--mono);
  font-size: 14px;
  border-bottom: 2px solid var(--ink);
}

.filter-group {
  margin-bottom: 16px;
}

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

.filter-label {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 2px 10px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.tag-list a:hover,
.tag-list a:focus-visible {
  background: var(--mint);
  color: var(--ink);
  text-decoration: none;
}

.book-table {
  min-width: 480px;
}

.book-table td:first-child {
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}

.table-note {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.field-panel .field-list {
  margin: 0;
}

/* 首页 - 题材带 */
.genre-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 36px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.genre-rows {
  display: flex;
  flex-direction: column;
}

.genre-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.genre-row:first-child {
  border-top: 1px dashed var(--line);
}

.genre-name {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.genre-rule {
  font-size: 14px;
  color: var(--ink-soft);
}

.genre-link {
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}

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

.genre-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.genre-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

/* 首页 - 阅读路径与规则版本 */
.path-version {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 36px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

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

.step-item {
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-no {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--paper);
  background: var(--green);
  border-radius: 3px;
  padding: 1px 8px;
}

.step-item h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.step-item p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.step-item a {
  font-family: var(--mono);
  font-size: 13px;
}

.version-card h2 {
  font-family: var(--mono);
}

.version-no {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--green-dark);
}

/* 首页 - 编辑工作区摘要 */
.desk-summary {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 36px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.flow-item {
  padding: 16px 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
}

.flow-item h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.flow-item p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.desk-duties {
  padding: 22px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.desk-duties h3 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 15px;
}

.duty-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

.duty-list li {
  position: relative;
  padding-left: 20px;
}

.duty-list li::before {
  content: "·";
  position: absolute;
  left: 6px;
  font-weight: 700;
  color: var(--green);
}

.desk-link {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

/* 首页 - 最近记录与帮助入口 */
.recent-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  padding: 40px 0 8px;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 14px;
  border-left: 2px solid var(--line);
}

.timeline-item {
  position: relative;
  padding: 0 0 18px 22px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--paper);
  border: 2px solid var(--green);
  border-radius: 50%;
}

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

.timeline-date {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--green-dark);
}

.timeline-item p {
  margin: 2px 0 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.recent-link {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

.help-panel h2 {
  margin-bottom: 14px;
}

.help-entry {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 16px 0 0;
  font-size: 14px;
}

/* 内页 - 连载总览 */
.serials-filters,
.serials-table-area,
.serials-field-guide {
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.serials-filters h2,
.serials-table-area h2,
.serials-field-guide h2 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.serials-filters .section-note,
.serials-table-area .section-note,
.serials-field-guide .section-note {
  margin-bottom: 14px;
  font-size: 13px;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-tag {
  min-height: 32px;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.filter-tag:hover,
.filter-tag:focus-visible {
  background: var(--mint);
  color: var(--ink);
  text-decoration: none;
}

.serials-filters .filter-group {
  margin-bottom: 16px;
}

.serials-filters .filter-group:last-child {
  margin-bottom: 0;
}

.serials-filters .filter-group h3 {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-soft);
}

.serials-table {
  min-width: 640px;
}

.serials-table td:first-child {
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}

.serials-field-guide .field-list {
  margin: 0;
}

.compare-bar {
  margin-top: 28px;
  padding: 22px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.compare-bar h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 15px;
}

.compare-bar .section-note {
  margin-bottom: 14px;
  font-size: 13px;
}

.compare-slots {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 12px;
}

.compare-slot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  min-height: 62px;
  padding: 12px 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.compare-slot-empty {
  border-style: dashed;
  color: var(--ink-soft);
}

.compare-id {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.compare-meta {
  flex-grow: 1;
  font-size: 13px;
  color: var(--ink-soft);
}

.compare-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 2px 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--orange);
  background: transparent;
  border: 1px solid var(--orange);
  border-radius: 3px;
}

.compare-remove:hover,
.compare-remove:focus-visible {
  background: var(--orange);
  color: var(--white);
}

.compare-tip {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.compare-link {
  font-family: var(--mono);
  font-size: 13px;
}

.recent-updates {
  margin-top: 28px;
}

.recent-updates h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
}

.update-group {
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}

.update-group:first-of-type {
  border-top: 1px dashed var(--line);
}

.update-date {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--green-dark);
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.update-id {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
}

.serials-figure {
  margin: 32px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}

.serials-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.serials-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

/* 内页 - 题材分区 */
.genre-overview {
  margin-bottom: 32px;
}

.genre-overview h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
}

.genre-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.genre-chip-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 16px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.genre-chip-list a:hover,
.genre-chip-list a:focus-visible {
  background: var(--mint);
  text-decoration: none;
}

.genre-catalog {
  margin-bottom: 36px;
}

.genre-catalog h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
}

.genre-scene {
  margin: 0 0 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}

.genre-scene img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.genre-scene figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.genre-catalog .genre-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.genre-catalog .genre-row:first-of-type {
  border-top: 1px solid var(--line);
}

.genre-row-main h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.genre-row-main .genre-rule {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.genre-row-tip {
  padding: 14px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
}

.genre-row-tip .genre-scene-tip {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.genre-entry {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

.cross-path {
  margin-bottom: 36px;
}

.cross-path h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 16px;
}

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

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

.path-col h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.path-col p {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--ink-soft);
}

.path-col a {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

.genre-notes {
  margin-bottom: 36px;
}

.genre-notes h2 {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 16px;
}

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

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

.note-col h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.note-col p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.genre-related h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 16px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: 15px;
}

.related-list a {
  font-weight: 700;
}

/* 内页 - 阅读指引 */
.doc-content {
  min-width: 0;
}

.guide-prep,
.guide-chapter,
.guide-status,
.guide-faq {
  margin-bottom: 36px;
}

.guide-prep h2,
.guide-chapter h2,
.guide-status h2,
.guide-faq h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.prep-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.prep-step {
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-index {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--paper);
  background: var(--green);
  border-radius: 3px;
  padding: 1px 8px;
}

.prep-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.prep-step p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.prep-step a {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

.chapter-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 26px;
  align-items: start;
}

.chapter-text p {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--ink-soft);
}

.chapter-points {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.chapter-points li {
  position: relative;
  padding-left: 20px;
}

.chapter-points li::before {
  content: "▸";
  position: absolute;
  left: 2px;
  color: var(--green);
}

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

.chapter-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.chapter-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.status-table {
  min-width: 0;
}

.status-table td:first-child {
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}

.doc-aside {
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.doc-aside h2 {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.doc-aside .version-card {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.version-label {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
}

.version-number {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--green-dark);
}

.version-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

.aside-help {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.aside-help ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}

/* 内页 - 编辑工作区 */
.main-column {
  min-width: 0;
}

.desk-flow,
.desk-roles,
.desk-fields,
.desk-records {
  margin-bottom: 36px;
}

.desk-flow h2,
.desk-roles h2,
.desk-fields h2,
.desk-records h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.flow-step {
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.flow-index {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--paper);
  background: var(--green);
  border-radius: 3px;
  padding: 1px 8px;
}

.flow-step h3 {
  margin: 0 0 6px;
  font-size: 15px;
}

.flow-step p {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.flow-step a {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

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

.role-card {
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--green);
  border-radius: var(--radius);
}

.role-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.role-card p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.role-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

.role-list li {
  position: relative;
  padding-left: 16px;
}

.role-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  font-weight: 700;
  color: var(--green);
}

.field-table {
  min-width: 0;
}

.field-table td:first-child {
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}

.record-list {
  display: flex;
  flex-direction: column;
  margin-top: 16px;
  border-left: 2px solid var(--line);
}

.record-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 16px;
  padding: 12px 0 12px 20px;
  position: relative;
}

.record-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 20px;
  width: 12px;
  height: 12px;
  background: var(--paper);
  border: 2px solid var(--green);
  border-radius: 50%;
}

.record-date {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--green-dark);
}

.record-body p {
  margin: 0 0 4px;
  font-size: 14px;
  color: var(--ink-soft);
}

.record-field {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
}

.side-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.side-card {
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.side-card h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.quickref-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  font-size: 14px;
}

.quickref-list dt {
  padding-top: 8px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
}

.quickref-list dd {
  padding: 2px 0 8px;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--line);
}

.quickref-list dt:last-of-type + dd {
  border-bottom: 0;
}

.desk-scene {
  margin-top: 8px;
}

.desk-scene h2 {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 16px;
}

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

.scene-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.scene-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

/* 内页 - 更新记录 */
.page-wrap {
  max-width: 100%;
}

.page-intro {
  margin-bottom: 28px;
}

.content-media {
  margin: 20px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}

.content-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.content-media figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.version-status {
  margin-bottom: 32px;
}

.status-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
  padding: 16px 20px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
}

.status-item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.status-label {
  font-family: var(--mono);
  font-size: 12px;
  color: #a9b8a2;
}

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

.status-link {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 13px;
  color: #f0b070;
}

.status-link:hover,
.status-link:focus-visible {
  color: #ffffff;
}

.log-section,
.change-table-section,
.impact-section {
  margin-bottom: 36px;
}

.timeline {
  display: flex;
  flex-direction: column;
  margin-top: 8px;
}

.timeline-group {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.timeline-date {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--green-dark);
  padding-top: 2px;
}

.timeline-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.log-entry {
  padding: 14px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
}

.log-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 6px;
}

.log-text {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.log-impact {
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

.log-ref {
  font-family: var(--mono);
  font-size: 12px;
}

.ref-code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--green-dark);
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 8px;
}

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

.impact-col h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.impact-col p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.impact-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--ink-soft);
}

.impact-list li {
  position: relative;
  padding-left: 18px;
}

.impact-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--green);
}

.version-switch {
  margin-top: 8px;
}

.switch-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 32px;
  padding: 26px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.switch-text h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 18px;
}

.switch-text p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

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

/* 内页 - 规则版本 */
.container {
  max-width: 100%;
}

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

.page-primary .version-card {
  margin-bottom: 36px;
}

.version-card-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
  margin: 0 0 14px;
}

.version-field dt {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
}

.version-field dd {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.version-card-note {
  margin: 0;
  padding-top: 12px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px dashed var(--line);
}

.rule-summary {
  margin-bottom: 36px;
}

.rule-summary h2,
.version-changes h2 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.rule-group {
  margin-top: 18px;
}

.rule-group h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

.rule-list li {
  position: relative;
  padding-left: 20px;
}

.rule-list li::before {
  content: "▸";
  position: absolute;
  left: 2px;
  color: var(--green);
}

.version-changes {
  margin-bottom: 32px;
}

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

.version-table td:first-child {
  font-family: var(--mono);
  font-size: 13px;
  white-space: nowrap;
}

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

.doc-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.doc-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.page-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.version-switch-list a {
  display: flex;
  align-items: center;
  min-height: 36px;
  font-family: var(--mono);
  font-size: 13px;
}

.switch-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}

/* 内页 - 版权与反馈 */
.page-content {
  min-width: 0;
}

.content-section {
  margin-bottom: 36px;
}

.content-section h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}

.content-section > p {
  max-width: 68ch;
  font-size: 15px;
  color: var(--ink-soft);
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 8px;
}

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

.boundary-in {
  border-top: 4px solid var(--green);
}

.boundary-out {
  border-top: 4px solid var(--orange);
}

.boundary-col h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.boundary-list li {
  position: relative;
  padding-left: 18px;
}

.boundary-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--green);
}

.boundary-out .boundary-list li::before {
  color: var(--orange);
}

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

.feedback-item {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 16px;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feedback-tag {
  justify-self: start;
  min-height: 28px;
  color: var(--green-dark);
}

.feedback-body p {
  margin: 0 0 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.material-card {
  padding: 18px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.material-card h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.material-card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.section-figure {
  margin: 20px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}

.section-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.section-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* 404 */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52vh;
  padding-top: 48px;
}

.error-panel {
  width: 100%;
  max-width: 640px;
  padding: 36px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--orange);
  border-radius: var(--radius);
  text-align: left;
}

.error-code {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 48px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.error-panel h1 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.6vw, 34px);
}

.error-lead {
  margin: 0 0 18px;
  font-size: 16px;
  color: var(--ink-soft);
}

.error-hint-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--ink-soft);
}

.error-hint-list li {
  position: relative;
  padding-left: 20px;
}

.error-hint-list li::before {
  content: "▸";
  position: absolute;
  left: 2px;
  color: var(--green);
}

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

/* ========== responsive ========== */

@media (max-width: 1024px) {
  .hero-workbench {
    gap: 32px;
  }

  .workbench-grid {
    grid-template-columns: 190px minmax(0, 1fr);
  }

  .field-panel {
    grid-column: 1 / -1;
  }

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

  .page-layout.serials-layout {
    grid-template-columns: 200px minmax(0, 1fr);
  }

  .serials-field-guide {
    grid-column: 1 / -1;
  }

  .serials-field-guide .field-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 24px;
  }

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

  .genre-band {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 28px;
  }
}

@media (max-width: 768px) {
  body.site-body {
    font-size: 15px;
  }

  .header-top {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 16px;
  }

  .nav-toggle {
    display: flex;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 2px;
    width: 100%;
    padding: 8px 0 4px;
    border-top: 1px solid var(--line);
  }

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

  .nav-list a {
    min-height: 44px;
    padding: 10px 12px;
  }

  .sub-nav {
    padding: 0 16px;
  }

  .sub-nav-list {
    flex-direction: column;
    gap: 0;
  }

  .sub-nav-list a {
    min-height: 44px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--line);
  }

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

  .site-main {
    padding: 0 16px 48px;
  }

  .breadcrumb-list {
    padding: 12px 16px 0;
  }

  .page-title {
    font-size: 28px;
  }

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

  .serials-field-guide,
  .field-panel {
    grid-column: auto;
  }

  .field-panel .field-list,
  .serials-field-guide .field-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
    padding: 36px 16px 24px;
  }

  .footer-bottom {
    padding: 16px 16px 24px;
  }

  .hero-workbench {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 32px 0;
  }

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

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

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

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

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

  .genre-row {
    grid-template-columns: 1fr;
    gap: 4px;
    align-items: start;
  }

  .genre-link {
    justify-self: start;
  }

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

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

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

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

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

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

  .genre-catalog .genre-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .cross-path-grid,
  .notes-grid,
  .prep-steps,
  .roles-grid,
  .impact-grid,
  .boundary-grid,
  .material-grid,
  .version-card-fields {
    grid-template-columns: minmax(0, 1fr);
  }

  .chapter-split {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

  .record-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .timeline-group {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .feedback-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .switch-panel {
    padding: 20px;
  }

  .status-link {
    margin-left: 0;
  }

  .error-panel {
    padding: 24px;
  }

  .footer-col a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
  }
}

@media (max-width: 420px) {
  .brand-mark {
    font-size: 18px;
  }

  .brand-sub {
    font-size: 10px;
  }

  .hero-text h1 {
    font-size: 27px;
  }

  .btn {
    width: 100%;
  }

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

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