:root {
  --paper: #f3ede1;
  --paper-soft: #fbf7ee;
  --ink: #24211c;
  --ink-soft: #6e6558;
  --seal: #8b3d2e;
  --line: #d6c9b6;
  --line-soft: #e6ddcd;
  --serif: "Songti SC", "SimSun", "Source Han Serif SC", "Noto Serif CJK SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;
  --shell: min(1180px, calc(100% - 40px));
  --radius: 6px;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0;
}

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

dl, dd, dt, figure, figcaption {
  margin: 0;
}

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

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

a:hover,
a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--seal);
  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: 40;
  padding: 8px 16px;
  background: var(--ink);
  color: var(--paper-soft);
  border-radius: var(--radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
}

/* ===== layout ===== */
.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1 0 auto;
  padding-bottom: 64px;
}

.inner-main {
  padding-top: 8px;
}

.site-header {
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  position: relative;
}

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

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

.brand-mark {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
}

.brand-sub {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

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

.site-nav a {
  display: inline-block;
  padding: 6px 2px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.4;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--ink);
  text-decoration: none;
  border-bottom-color: var(--line);
}

.site-nav a.is-current {
  color: var(--ink);
  font-weight: 600;
  border-bottom-color: var(--seal);
}

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

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

.breadcrumb {
  padding: 18px 0 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

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

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

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

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

.page-header {
  padding: 22px 0 0;
}

.page-title {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  overflow-wrap: break-word;
}

.page-lead {
  margin-top: 14px;
  max-width: 72ch;
  color: var(--ink-soft);
  font-size: 1rem;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  margin-top: 32px;
  align-items: start;
}

.page-layout.layout-shell,
.page-layout.layout-with-aside,
.page-layout.layout-main-aside {
  grid-template-columns: minmax(0, 1fr);
}

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

.page-aside,
.page-toc,
.faq-toc {
  min-width: 0;
}

/* ===== components ===== */
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  line-height: 1.4;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--seal);
  color: var(--paper-soft);
  border-color: var(--seal);
}

.btn-primary:hover {
  background-color: #77301f;
  border-color: #77301f;
  color: var(--paper-soft);
  text-decoration: none;
}

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

.btn-ghost:hover {
  background-color: var(--paper-soft);
  text-decoration: none;
  border-color: var(--ink-soft);
}

.section-title {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--ink);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
  margin-bottom: 22px;
}

.section-desc {
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.section-lead {
  max-width: 68ch;
  margin-top: 8px;
  margin-bottom: 20px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.section-note {
  max-width: 66ch;
  margin-top: 8px;
  margin-bottom: 20px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.index-stamp {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.stamp-code,
.index-code,
.code-num {
  color: var(--seal);
  font-weight: 700;
}

.stamp-label,
.index-label {
  color: var(--ink-soft);
}

.index-tag {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--seal);
}

.copy-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 6px 16px;
  background-color: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.copy-link:hover {
  border-color: var(--seal);
  color: var(--seal);
}

.copy-status {
  font-size: 0.8rem;
  color: var(--seal);
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.data-table,
.ledger-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.data-table caption,
.ledger-table caption {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.data-table th,
.data-table td,
.ledger-table th,
.ledger-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.data-table thead th,
.ledger-table thead th {
  background-color: #efe7d8;
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

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

.data-table tbody tr:hover,
.ledger-table tbody tr:hover {
  background-color: #f6f0e3;
}

.cell-code {
  font-family: var(--mono);
  color: var(--seal);
  white-space: nowrap;
}

.plain-list {
  margin: 14px 0;
  padding-left: 0;
}

.plain-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  color: var(--ink);
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.75em;
  width: 6px;
  height: 6px;
  background-color: var(--seal);
  border-radius: 50%;
}

.step-list {
  display: grid;
  gap: 18px;
  margin: 22px 0;
}

.step-item {
  padding: 18px 20px;
  border-left: 3px solid var(--seal);
  background-color: var(--paper-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.step-no {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--seal);
}

.step-item h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.step-result,
.step-next {
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.step-next a {
  color: var(--seal);
}

.guide-figure,
.article-figure,
.intro-figure,
.legend-figure,
.faq-intro-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.guide-figure img,
.article-figure img,
.intro-figure img,
.legend-figure img,
.faq-intro-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.guide-figure figcaption,
.article-figure figcaption,
.intro-figure figcaption,
.legend-figure figcaption,
.faq-intro-figure figcaption {
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line-soft);
}

/* ===== pages: home ===== */
.hero-index {
  padding: 40px 0 8px;
}

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

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

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--seal);
  margin-bottom: 12px;
}

.hero-copy h1 {
  font-size: clamp(2rem, 3.6vw, 3rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
  overflow-wrap: break-word;
}

.hero-lead {
  margin-top: 16px;
  max-width: 60ch;
  font-size: 1.02rem;
  color: var(--ink-soft);
}

.hero-hints {
  margin-top: 20px;
  display: grid;
  gap: 8px;
}

.hero-hints li {
  position: relative;
  padding-left: 20px;
  font-size: 0.92rem;
  color: var(--ink);
}

.hero-hints li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.8em;
  width: 8px;
  height: 2px;
  background-color: var(--seal);
}

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

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

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

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

.hero-figure figcaption {
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line-soft);
}

.index-seal {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-top: 14px;
  padding: 8px 14px;
  border: 1px solid var(--seal);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.seal-no {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--seal);
}

.seal-label {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.quick-index {
  padding: 48px 0 0;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.quick-item {
  display: flex;
  flex-direction: column;
  padding: 20px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.quick-no {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--seal);
  margin-bottom: 8px;
}

.quick-item h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.quick-item p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.quick-item a {
  margin-top: auto;
  font-size: 0.88rem;
  color: var(--seal);
  align-self: flex-start;
}

.genre-preview {
  padding: 48px 0 0;
}

.genre-rows {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.genre-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.genre-no {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--seal);
  font-weight: 700;
}

.genre-body h3 {
  font-size: 1.08rem;
  margin-bottom: 4px;
}

.genre-body p {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.genre-link {
  font-size: 0.88rem;
  color: var(--seal);
  align-self: start;
  justify-self: start;
}

.schedule-track {
  padding: 48px 0 0;
}

.track-list {
  display: grid;
  gap: 0;
  margin-top: 22px;
  padding-left: 22px;
  position: relative;
}

.track-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: var(--line);
}

.track-node {
  position: relative;
  padding: 0 0 24px 0;
}

.track-node::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--paper);
  border: 2px solid var(--seal);
}

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

.track-phase {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--seal);
  margin-bottom: 8px;
}

.track-card {
  padding: 18px 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.track-card h3 {
  font-size: 1.08rem;
  margin-bottom: 6px;
}

.track-card p {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.track-status {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--seal);
}

.track-card a {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.88rem;
}

.reading-path {
  padding: 48px 0 0;
}

.path-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 22px;
}

.path-step {
  padding: 20px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-step .step-no {
  display: block;
  margin-bottom: 8px;
}

.path-step h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.path-step p {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.path-step .step-result {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--seal);
  font-size: 0.85rem;
}

.library-sample {
  padding: 48px 0 0;
}

.sample-list {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

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

.sample-thumb {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
}

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

.sample-fields {
  min-width: 0;
}

.sample-no {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--seal);
  font-weight: 700;
  margin-bottom: 6px;
}

.sample-fields h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.field-list {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
}

.field-list dt {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-soft);
}

.field-list dd {
  font-size: 0.9rem;
  color: var(--ink);
  margin-bottom: 4px;
}

.sample-fields a {
  font-size: 0.88rem;
}

.revisions-faq {
  padding: 48px 0 0;
}

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

.revision-brief,
.faq-brief {
  padding: 24px 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-top: 3px solid var(--seal);
  border-radius: var(--radius);
}

.brief-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 18px;
}

.brief-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.92rem;
  color: var(--ink);
}

.brief-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.8em;
  width: 7px;
  height: 2px;
  background-color: var(--seal);
}

.brief-link {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--seal);
}

/* ===== pages: inner shared ===== */
.page-head {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-head .page-lead {
  flex: 1 1 260px;
  margin-top: 0;
}

.page-title-block {
  margin-top: 18px;
}

.page-title-block .page-lead {
  margin-top: 14px;
}

.page-title-block .copy-link {
  margin-top: 16px;
}

.title-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.title-meta {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.title-column {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.title-lead {
  flex: 1 1 260px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.title-code {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.title-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
}

.text-link {
  font-size: 0.9rem;
  color: var(--seal);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 30px;
  align-items: start;
}

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

.intro-lead {
  margin-top: 14px;
  color: var(--ink);
}

.intro-hints {
  display: grid;
  gap: 8px;
  margin: 16px 0 20px;
}

.intro-hints li {
  position: relative;
  padding-left: 18px;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.intro-hints li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 2px;
  background-color: var(--seal);
}

.intro-hints strong {
  color: var(--ink);
}

.entry-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 22px;
}

.entry-col {
  padding: 20px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.entry-code {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--seal);
  margin-bottom: 8px;
}

.entry-col h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.entry-col p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.entry-col a {
  font-size: 0.88rem;
}

.task-band {
  margin-top: 44px;
}

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

.task-col {
  padding: 22px 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-left: 3px solid var(--seal);
  border-radius: var(--radius);
}

.task-col h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.task-col p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.task-link {
  font-size: 0.9rem;
  color: var(--seal);
}

.library-ledger,
.genre-entry {
  margin-top: 40px;
}

.ledger-note {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.ledger-note a {
  color: var(--seal);
}

/* ===== pages: genres ===== */
.genre-intro {
  margin-top: 32px;
}

.genre-intro h2 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.comparison-table {
  margin-top: 40px;
}

.table-note {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.scenario-picker {
  margin-top: 40px;
}

.scenario-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.scenario-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.scenario-scene h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.scenario-scene p,
.scenario-pick p {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.scenario-pick p {
  padding: 8px 12px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  color: var(--ink);
}

.scenario-link a {
  font-size: 0.88rem;
  color: var(--seal);
}

.selection-checklist {
  margin-top: 40px;
}

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

.check-item {
  padding: 18px 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.check-item p {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.related-band {
  margin-top: 40px;
}

.related-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 18px;
}

.related-card {
  padding: 20px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-card h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.related-card p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.related-card a {
  font-size: 0.88rem;
}

/* ===== pages: schedule ===== */
.schedule-legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 8px;
  align-items: start;
}

.legend-copy h2 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.legend-copy p {
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.legend-notes {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.legend-notes li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--ink);
}

.legend-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 2px;
  background-color: var(--seal);
}

.phase-track {
  margin-top: 44px;
}

.phase-list {
  display: grid;
  gap: 0;
  margin-top: 22px;
  position: relative;
}

.phase-group {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 26px;
  position: relative;
}

.phase-group::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--line);
}

.phase-group:last-child {
  padding-bottom: 0;
}

.phase-marker {
  grid-column: 1;
  grid-row: 1;
  align-self: start;
  width: 56px;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  background-color: var(--paper);
  border: 2px solid var(--seal);
  border-radius: var(--radius);
  position: relative;
  z-index: 1;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--seal);
  text-align: center;
}

.phase-cards {
  grid-column: 2;
  display: grid;
  gap: 14px;
  min-width: 0;
}

.phase-card {
  padding: 16px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.phase-name {
  display: block;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.phase-code {
  display: block;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.phase-card .field-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 0.88rem;
}

.phase-card .field-row:last-of-type {
  border-bottom: 0;
}

.phase-card .field {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-soft);
}

.status-tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius);
  font-size: 0.76rem;
  font-family: var(--mono);
}

.phase-card .status-tag {
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

.status-collected {
  color: var(--seal);
  border-color: var(--seal);
}

.status-reviewed {
  color: var(--ink);
  border-color: var(--ink-soft);
}

.phase-card .card-title {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

.phase-card .card-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--seal);
}

.status-key {
  margin-top: 44px;
}

.status-definitions {
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--line);
}

.status-def {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.status-def dt {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--seal);
}

.status-def dd {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.status-table-section {
  margin-top: 44px;
}

.band-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 18px;
}

.band-item {
  padding: 20px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-left: 3px solid var(--seal);
  border-radius: var(--radius);
}

.band-item h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.band-item p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.band-link {
  font-size: 0.88rem;
  color: var(--seal);
}

.aside-toc,
.aside-links {
  padding: 18px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-links {
  margin-top: 16px;
}

.aside-title {
  font-size: 1rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.aside-toc ul,
.aside-links ul {
  display: grid;
  gap: 8px;
}

.aside-toc a,
.aside-links a {
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--ink);
}

.aside-toc a:hover,
.aside-links a:hover {
  color: var(--seal);
}

/* ===== pages: reading-guide / revisions ===== */
.reading-article,
.revision-article {
  min-width: 0;
}

.guide-section,
.article-section {
  margin-bottom: 38px;
}

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

.guide-section h2,
.article-section h2 {
  font-size: 1.45rem;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.guide-section h3,
.article-section h3 {
  font-size: 1.1rem;
  margin: 18px 0 6px;
}

.guide-section p,
.article-section p {
  margin-bottom: 12px;
  color: var(--ink);
}

.guide-section a,
.article-section a {
  color: var(--seal);
}

.guide-section .guide-figure,
.article-section .article-figure {
  margin: 18px 0;
}

.step-list .step-item p {
  margin-bottom: 6px;
}

.step-list .step-item p:last-child {
  margin-bottom: 0;
}

.section-tail {
  margin-top: 14px;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.toc-block {
  padding: 18px 18px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toc-block + .toc-block {
  margin-top: 16px;
}

.toc-title {
  font-size: 1rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.toc-block ul {
  display: grid;
  gap: 8px;
}

.toc-block a {
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--ink);
}

.toc-block a:hover {
  color: var(--seal);
}

/* ===== pages: faq ===== */
.faq-article {
  min-width: 0;
}

.faq-article .page-head {
  margin-top: 0;
}

.faq-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin: 26px 0 8px;
  align-items: start;
}

.faq-intro-copy h2 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.faq-intro-copy p {
  margin-bottom: 10px;
  color: var(--ink-soft);
}

.faq-group {
  margin-top: 34px;
}

.faq-group h2 {
  font-size: 1.4rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}

.faq-group-note {
  margin-bottom: 14px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

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

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

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 44px;
  padding: 12px 16px;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  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(--sans);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--seal);
}

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

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

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

.faq-answer {
  padding: 12px 16px 14px;
}

.faq-answer p {
  margin-bottom: 8px;
  font-size: 0.94rem;
  color: var(--ink);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-boundary {
  margin-top: 40px;
  padding: 22px 20px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-left: 3px solid var(--seal);
  border-radius: var(--radius);
}

.faq-boundary h2 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.boundary-list {
  display: grid;
  gap: 10px;
}

.boundary-list li {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.boundary-list strong {
  color: var(--ink);
  margin-right: 4px;
}

.faq-toc .toc-block + .toc-block {
  margin-top: 16px;
}

.faq-toc h2 {
  font-size: 1rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.faq-toc ul {
  display: grid;
  gap: 8px;
}

.faq-toc a {
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--ink);
}

.faq-toc a:hover {
  color: var(--seal);
}

/* ===== pages: 404 ===== */
.error-main {
  padding: 64px 0 80px;
}

.error-inner {
  display: flex;
  justify-content: center;
}

.error-panel {
  width: 100%;
  max-width: 620px;
  padding: 36px 28px;
  background-color: var(--paper-soft);
  border: 1px solid var(--line);
  border-top: 3px solid var(--seal);
  border-radius: var(--radius);
  text-align: left;
}

.error-code {
  font-family: var(--mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--seal);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin-bottom: 14px;
}

.error-lead {
  color: var(--ink);
  margin-bottom: 10px;
}

.error-hint {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-bottom: 22px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.error-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  background-color: var(--seal);
  color: var(--paper-soft);
  border: 1px solid var(--seal);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.error-button:hover {
  background-color: #77301f;
  text-decoration: none;
  color: var(--paper-soft);
}

.error-link {
  font-size: 0.92rem;
  color: var(--seal);
}

/* ===== footer ===== */
.site-footer {
  flex-shrink: 0;
  margin-top: 56px;
  border-top: 1px solid var(--line);
  background-color: var(--paper);
  padding: 40px 0 0;
}

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

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

.footer-brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 0.88rem;
  color: var(--ink-soft);
  max-width: 34ch;
}

.footer-title {
  font-size: 0.92rem;
  font-family: var(--sans);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.footer-col ul {
  display: grid;
  gap: 8px;
}

.footer-col a {
  display: inline-block;
  padding: 3px 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

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

.footer-bottom {
  margin-top: 32px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ===== responsive ===== */
@media (min-width: 640px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
    gap: 40px;
  }

  .genre-row {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: center;
    gap: 18px;
  }

  .sample-item {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: start;
  }

  .field-list {
    grid-template-columns: 84px minmax(0, 1fr);
    align-items: baseline;
  }

  .field-list dd {
    margin-bottom: 0;
  }

  .path-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .quick-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

  .intro-grid {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 380px);
    gap: 32px;
  }

  .entry-columns {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .scenario-row {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) auto;
    align-items: center;
    gap: 18px;
  }

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

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

  .schedule-legend {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 340px);
    gap: 28px;
  }

  .status-def {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

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

  .faq-intro {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
    gap: 24px;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
    gap: 32px;
  }
}

@media (min-width: 960px) {
  .page-layout.layout-shell {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 44px;
  }

  .page-layout.layout-with-aside {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 44px;
  }

  .page-layout.layout-main-aside {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 44px;
  }

  .reading-article,
  .revision-article {
    max-width: 720px;
  }

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

  .site-main.inner-main {
    padding-bottom: 72px;
  }
}

@media (max-width: 959px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 0;
    background-color: var(--paper-soft);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 8px 20px rgba(36, 33, 28, 0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }

  .site-nav.is-open {
    max-height: 460px;
    overflow-y: auto;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
  }

  .site-nav li {
    border-bottom: 1px solid var(--line-soft);
  }

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

  .site-nav a {
    display: block;
    padding: 12px 14px;
    min-height: 44px;
    font-size: 0.98rem;
    border-bottom: 0;
    border-left: 3px solid transparent;
  }

  .site-nav a.is-current {
    border-left-color: var(--seal);
    border-bottom-color: transparent;
  }
}

@media (max-width: 639px) {
  :root {
    --shell: calc(100% - 28px);
  }

  .header-inner {
    min-height: 60px;
    gap: 12px;
  }

  .brand-mark {
    font-size: 1.2rem;
  }

  .brand-sub {
    font-size: 0.64rem;
  }

  .page-title {
    font-size: 1.9rem;
  }

  .hero-copy h1 {
    font-size: 1.9rem;
  }

  .section-title {
    font-size: 1.35rem;
  }

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

  .quick-item {
    padding: 16px 14px;
  }

  .quick-item:last-child {
    grid-column: 1 / -1;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .path-step,
  .step-item,
  .quick-item,
  .track-card,
  .entry-col,
  .related-card,
  .band-item,
  .task-col,
  .check-item {
    padding: 16px 14px;
  }

  .revision-brief,
  .faq-brief {
    padding: 20px 16px;
  }

  .error-panel {
    padding: 28px 20px;
  }

  .error-code {
    font-size: 2rem;
  }

  .phase-group {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
  }

  .phase-marker {
    width: 44px;
    min-height: 44px;
    font-size: 0.7rem;
  }

  .phase-group::before {
    left: 21px;
  }

  .phase-card .field-row {
    grid-template-columns: 56px minmax(0, 1fr);
  }

  .title-inner,
  .page-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .title-lead,
  .page-head .page-lead {
    flex: 1 1 auto;
  }

  .copy-link {
    width: 100%;
    justify-content: center;
  }

  .footer-grid {
    gap: 24px;
  }

  .data-table,
  .ledger-table {
    min-width: 560px;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}