:root {
  --ink: #1f2329;
  --ink-soft: #6b7280;
  --ink-faint: #9aa1ad;
  --dark: #14161c;
  --dark-2: #1c1f27;
  --dark-3: #262a34;
  --light: #f6f7f9;
  --light-2: #ffffff;
  --line: #e3e6eb;
  --line-dark: #333846;
  --brand: #3f7cff;
  --brand-deep: #2a5fd8;
  --genre: #f2a33c;
  --radius: 6px;
  --radius-sm: 4px;
  --wrap: 1180px;
  --gap: 24px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

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

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

body {
  margin: 0;
  background: var(--light);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

h1 {
  font-size: 32px;
}

h2 {
  font-size: 22px;
  line-height: 1.4;
}

h3 {
  font-size: 17px;
  line-height: 1.5;
}

h4 {
  font-size: 15px;
  line-height: 1.5;
}

p {
  margin: 0;
}

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

dl,
dd,
dt {
  margin: 0;
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

a:hover {
  color: var(--brand-deep);
}

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

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

button {
  font: inherit;
  color: inherit;
}

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

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

.site-body {
  background: var(--light);
  color: var(--ink);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--dark);
  border-bottom: 1px solid var(--line-dark);
}

.header-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: #fff;
}

.brand:hover {
  color: #fff;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0;
}

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  color: #c7ccd6;
  font-size: 15px;
}

.nav-link:hover {
  background: var(--dark-3);
  color: #fff;
}

.nav-link.is-current {
  background: var(--brand);
  color: #fff;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
  background: var(--dark-2);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: #dfe3ea;
}

.site-main {
  display: block;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

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

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

.page-header {
  padding: 18px 0 26px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 36px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--ink);
}

.page-description {
  margin-top: 12px;
  max-width: 880px;
  color: var(--ink-soft);
  font-size: 15px;
}

.page-description strong {
  color: var(--ink);
}

.site-footer {
  background: var(--dark);
  color: #b9bfcb;
  font-size: 14px;
}

.footer-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 24px 28px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
}

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

.footer-name {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}

.footer-desc {
  margin-top: 10px;
  max-width: 320px;
  color: #8d94a2;
  line-height: 1.8;
}

.footer-title {
  margin-bottom: 12px;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.footer-list li + li {
  margin-top: 8px;
}

.footer-list a {
  display: inline-block;
  min-height: 28px;
  color: #b9bfcb;
}

.footer-list a:hover {
  color: #fff;
}

.footer-copy {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 16px 24px 30px;
  border-top: 1px solid var(--line-dark);
  color: #7c8391;
  font-size: 13px;
}

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

.section-head {
  margin-bottom: 22px;
}

.section-title {
  font-size: 22px;
  color: var(--ink);
}

.section-desc {
  margin-top: 8px;
  max-width: 860px;
  color: var(--ink-soft);
}

.column-title {
  font-size: 16px;
  color: var(--ink);
  padding-bottom: 10px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.column-more {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin-top: 14px;
  font-size: 14px;
  color: var(--brand);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  line-height: 1.7;
  white-space: nowrap;
}

.tag-genre {
  background: rgba(242, 163, 60, 0.16);
  color: #a4641a;
}

.tag-status {
  background: rgba(63, 124, 255, 0.12);
  color: var(--brand-deep);
}

.tag-done {
  background: rgba(63, 124, 255, 0.12);
  color: var(--brand-deep);
}

.tag-paused {
  background: rgba(107, 114, 128, 0.14);
  color: #555c68;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
}

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

.btn-primary:hover {
  background: var(--brand-deep);
  color: #fff;
}

.btn-ghost {
  border: 1px solid var(--line-dark);
  color: #dfe3ea;
}

.btn-ghost:hover {
  border-color: var(--brand);
  color: #fff;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--light-2);
}

.data-table {
  min-width: 560px;
  font-size: 14px;
}

.table-caption {
  padding: 14px 16px;
  text-align: left;
  color: var(--ink-soft);
  font-size: 13px;
  border-bottom: 1px solid var(--line);
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  background: #eef0f4;
  color: var(--ink);
  font-weight: 700;
  white-space: nowrap;
  border-bottom: 1px solid var(--line);
}

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

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

.data-table tbody tr:hover {
  background: #fafbfd;
}

.figure-caption {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 13px;
}

.related-list {
  display: grid;
  gap: 12px;
}

.related-item {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--light-2);
}

.related-item a {
  font-weight: 600;
}

.related-desc {
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 14px;
}

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

.home-main {
  display: block;
}

.hero-directory {
  background: var(--dark);
  color: #d5d9e2;
}

.hero-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 60px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

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

.hero-eyebrow {
  display: inline-block;
  padding: 2px 10px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
  color: var(--genre);
  font-size: 13px;
}

.hero-title {
  margin-top: 16px;
  color: #fff;
  font-size: 34px;
  line-height: 1.3;
}

.hero-summary {
  margin-top: 16px;
  max-width: 560px;
  color: #a9b0bd;
  font-size: 15px;
}

.hero-genre-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.genre-chip {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
  background: var(--dark-2);
  color: #d5d9e2;
  font-size: 14px;
}

.genre-chip:hover {
  border-color: var(--brand);
  color: #fff;
}

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

.hero-visual {
  margin: 0;
  min-width: 0;
}

.hero-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line-dark);
}

.hero-caption {
  margin-top: 10px;
  color: #8d94a2;
  font-size: 13px;
}

.genre-overview,
.covers-updates,
.rank-topics,
.guide-summary,
.site-index {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 52px 24px 0;
}

.site-index {
  padding-bottom: 56px;
}

.genre-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.genre-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.genre-name {
  color: var(--ink);
}

.genre-scope {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.genre-samples {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.genre-samples li {
  position: relative;
  padding-left: 14px;
  color: var(--ink);
  font-size: 14px;
}

.genre-samples li + li {
  margin-top: 6px;
}

.genre-samples li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--genre);
}

.genre-more {
  margin-top: auto;
  padding-top: 14px;
  font-size: 14px;
}

.covers-updates-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

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

.cover-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.cover-card {
  display: flex;
  flex-direction: column;
  padding: 12px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.cover-card:hover {
  border-color: var(--brand);
  box-shadow: 0 4px 14px rgba(20, 22, 28, 0.07);
}

.cover-figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #e9ecf1;
}

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

.cover-name {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink);
}

.cover-tags {
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 12px;
}

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

.update-list {
  display: grid;
  gap: 2px;
}

.update-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.update-row:hover {
  border-color: var(--brand);
}

.update-date {
  color: var(--ink-soft);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.update-name {
  color: var(--ink);
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.update-genre {
  color: var(--ink-soft);
  font-size: 13px;
}

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

.rank-column,
.topic-column {
  min-width: 0;
}

.rank-list {
  display: grid;
  gap: 2px;
}

.rank-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.rank-item:hover {
  border-color: var(--brand);
}

.rank-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: #eef0f4;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.rank-item:nth-child(-n + 3) .rank-no {
  background: var(--brand);
  color: #fff;
}

.rank-name {
  color: var(--ink);
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-basis {
  color: var(--ink-soft);
  font-size: 13px;
}

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

.topic-card {
  display: flex;
  flex-direction: column;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.topic-card:hover {
  border-color: var(--brand);
  box-shadow: 0 4px 14px rgba(20, 22, 28, 0.07);
}

.topic-figure {
  margin: 0;
  background: #e9ecf1;
}

.topic-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.topic-name {
  margin: 12px 14px 0;
  font-size: 16px;
  color: var(--ink);
}

.topic-basis {
  margin: 6px 14px 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.topic-link {
  margin: 12px 14px 14px;
  font-size: 14px;
}

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

.field-column,
.boundary-column {
  min-width: 0;
}

.field-list {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 10px 16px;
  padding: 18px 20px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-list dt {
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
}

.field-list dd {
  color: var(--ink-soft);
  font-size: 14px;
}

.boundary-list {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-list li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.index-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.index-item:hover {
  border-color: var(--brand);
  transform: translateY(-2px);
}

.index-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}

.index-desc {
  color: var(--ink-soft);
  font-size: 13px;
}

/* ==========================================================================
   pages · 内页通用区块
   ========================================================================== */

.section {
  margin-bottom: 52px;
}

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

.issue-figure,
.summary-figure,
.fields-figure,
.guide-figure {
  margin: 0 0 20px;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #e9ecf1;
}

.issue-figure img,
.summary-figure img,
.fields-figure img,
.guide-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.issue-figure figcaption,
.summary-figure figcaption,
.fields-figure figcaption,
.guide-figure figcaption {
  padding: 10px 14px;
  color: var(--ink-soft);
  font-size: 13px;
  background: var(--light-2);
}

/* 最新一期 */

.page-latest .update-list {
  gap: 2px;
}

.page-latest .update-row {
  grid-template-columns: 100px minmax(0, 1fr) auto auto;
}

.summary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: start;
}

.summary-col {
  min-width: 0;
  padding: 20px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.summary-subtitle {
  font-size: 16px;
  color: var(--ink);
}

.summary-text {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.help-list {
  display: grid;
  gap: 12px;
}

.help-item {
  padding: 16px 18px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.help-item a {
  font-weight: 600;
}

.help-desc {
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 14px;
}

/* 往期目录 */

.issue-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--light-2);
}

.issue-table {
  min-width: 620px;
}

.cell-issue {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.cell-date {
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

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

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

.sub-title {
  font-size: 16px;
  color: var(--ink);
  padding-bottom: 10px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.fields-col-name .field-list {
  grid-template-columns: 100px minmax(0, 1fr);
}

.field-name {
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
}

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

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

.field-example-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.example-key {
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.example-value {
  color: var(--ink-soft);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.fields-note {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.guide-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.guide-step {
  min-width: 0;
  padding: 20px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-title {
  font-size: 16px;
  color: var(--ink);
}

.step-text {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

/* 专题策划 */

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

.topic-grid .topic-card {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  align-items: stretch;
}

.topic-grid .topic-figure {
  margin: 0;
  height: 100%;
  background: #e9ecf1;
}

.topic-grid .topic-figure img {
  width: 100%;
  height: 100%;
  min-height: 150px;
  object-fit: cover;
}

.topic-body {
  min-width: 0;
  padding: 18px 20px;
}

.topic-scope,
.topic-basis {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.topic-label {
  display: inline-block;
  margin-right: 6px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  background: rgba(242, 163, 60, 0.16);
  color: #a4641a;
  font-size: 12px;
}

.topic-item-table {
  min-width: 620px;
}

.reading-guide-section .guide-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: start;
}

.guide-col {
  min-width: 0;
  padding: 20px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.guide-subtitle {
  font-size: 16px;
  color: var(--ink);
}

.guide-list {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.guide-list li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

.guide-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.guide-note {
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

/* 阅读说明 */

.guide-block {
  margin-bottom: 52px;
}

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

.field-summary-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.field-summary-main {
  min-width: 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--light-2);
}

.field-table {
  min-width: 480px;
  font-size: 14px;
}

.field-table-caption {
  padding: 14px 16px;
  text-align: left;
  color: var(--ink-soft);
  font-size: 13px;
  border-bottom: 1px solid var(--line);
}

.field-table th {
  padding: 12px 16px;
  text-align: left;
  background: #eef0f4;
  color: var(--ink);
  font-weight: 700;
  border-bottom: 1px solid var(--line);
}

.field-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  vertical-align: top;
}

.field-table tbody tr:last-child td {
  border-bottom: 0;
}

.field-table td:first-child {
  color: var(--ink);
  font-weight: 700;
}

.field-summary-aside {
  min-width: 0;
}

.aside-title {
  font-size: 16px;
  color: var(--ink);
  padding-bottom: 10px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.aside-title + .aside-title {
  margin-top: 28px;
}

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

.aside-list li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

.aside-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--genre);
}

.scope-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: start;
}

.scope-col {
  min-width: 0;
  padding: 20px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scope-title {
  font-size: 16px;
  color: var(--ink);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.scope-covered .scope-title {
  border-bottom-color: rgba(63, 124, 255, 0.35);
}

.scope-excluded .scope-title {
  border-bottom-color: rgba(107, 114, 128, 0.35);
}

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

.scope-list li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.scope-covered .scope-list li::before {
  background: var(--brand);
}

.scope-excluded .scope-list li::before {
  background: var(--ink-faint);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item[open] {
  border-color: var(--brand);
}

.faq-question {
  padding: 16px 18px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  float: right;
  color: var(--brand);
  font-weight: 700;
}

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

.faq-answer {
  padding: 0 18px 16px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.faq-answer p {
  color: var(--ink-soft);
  font-size: 14px;
}

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

.error-main {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px 24px 72px;
}

.error-panel {
  max-width: 720px;
  padding: 32px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-code {
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.error-title {
  margin-top: 10px;
  font-size: 30px;
  color: var(--ink);
}

.error-text {
  margin-top: 12px;
  color: var(--ink-soft);
}

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

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--light);
  color: var(--ink);
  font-weight: 600;
}

.error-home-link:hover {
  border-color: var(--brand);
  color: var(--brand-deep);
}

.error-hint {
  margin-top: 40px;
}

.error-hint-title {
  font-size: 20px;
  color: var(--ink);
}

.error-hint-text {
  margin-top: 10px;
  color: var(--ink-soft);
}

.error-hint-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.error-hint-list li {
  padding: 14px 18px;
  background: var(--light-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-sub-link {
  font-weight: 600;
}

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

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

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

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

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

  .footer-inner {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-left: 0;
    padding: 8px 24px 16px;
    background: var(--dark);
    border-bottom: 1px solid var(--line-dark);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

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

  .nav-link {
    justify-content: flex-start;
    min-height: 44px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 40px 24px 44px;
  }

  .covers-updates-grid,
  .rank-topics-grid,
  .guide-summary-grid,
  .summary-columns,
  .issue-fields-layout,
  .field-summary-layout,
  .scope-layout,
  .reading-guide-section .guide-columns {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 640px) {
  .header-inner {
    padding: 0 16px;
    min-height: 58px;
  }

  .site-nav {
    padding: 8px 16px 16px;
  }

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

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

  .page-title {
    font-size: 24px;
  }

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

  .genre-overview,
  .covers-updates,
  .rank-topics,
  .guide-summary,
  .site-index {
    padding: 40px 16px 0;
  }

  .site-index {
    padding-bottom: 44px;
  }

  .genre-grid,
  .index-grid,
  .guide-steps,
  .topic-cards {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .update-row,
  .page-latest .update-row {
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: 4px;
  }

  .update-name {
    white-space: normal;
  }

  .update-genre {
    grid-column: 1 / -1;
  }

  .rank-item {
    grid-template-columns: 30px minmax(0, 1fr);
    row-gap: 4px;
  }

  .rank-name {
    white-space: normal;
  }

  .rank-basis {
    grid-column: 2 / -1;
  }

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

  .topic-grid .topic-figure img {
    min-height: 0;
    aspect-ratio: 16 / 9;
  }

  .field-list,
  .fields-col-name .field-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px 0;
  }

  .field-list dd {
    margin-bottom: 10px;
  }

  .error-panel {
    padding: 24px 20px;
  }

  .error-main {
    padding: 40px 16px 56px;
  }

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

  .footer-copy {
    padding: 16px 16px 26px;
  }
}