/* ============================================================
   光棍影院YY · 全站样式表
   分组：base / layout / components / pages / responsive
   ============================================================ */

/* ------------------------------------------------------------
   base：变量、重置、排版
   ------------------------------------------------------------ */
:root {
  --c-ink: #0f1115;
  --c-ink-soft: #4a5160;
  --c-line: #e8eaed;
  --c-surface: #f6f7f9;
  --c-action: #1f5eff;
  --c-action-dark: #1747c4;
  --c-page: #ffffff;

  --font-sans: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;

  --wrap: 1120px;
  --gap: 24px;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-card: 0 1px 2px rgba(15, 17, 21, 0.05);
}

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

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

body {
  margin: 0;
  background: var(--c-page);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

p {
  margin: 0;
}

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

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

a:hover,
a:focus {
  color: var(--c-action-dark);
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

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

/* ------------------------------------------------------------
   layout：骨架容器 —— 页头 / 主导航 / 主区 / 面包屑 / 页脚
   ------------------------------------------------------------ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--c-page);
  color: var(--c-ink);
}

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

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--c-ink);
  font-weight: 700;
  font-size: 17px;
  white-space: nowrap;
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--c-ink);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.brand-note {
  color: var(--c-ink-soft);
  font-size: 13px;
  font-weight: 400;
}

/* 主导航 */
.site-nav {
  margin-left: auto;
}

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

.nav-item {
  display: block;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  color: var(--c-ink-soft);
  font-size: 15px;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--c-ink);
  background: var(--c-surface);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--c-ink);
  font-weight: 700;
  box-shadow: inset 0 -2px 0 var(--c-action);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-page);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-ink);
}

/* 主内容 */
.site-main {
  flex: 1 0 auto;
  width: 100%;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--c-ink-soft);
  margin-bottom: 16px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus {
  color: var(--c-action);
}

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

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

/* 内页标题区 */
.page-header {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 12px;
}

.page-description {
  max-width: 760px;
  color: var(--c-ink-soft);
  font-size: 16px;
}

/* 页脚 */
.site-footer {
  flex-shrink: 0;
  background: var(--c-surface);
  border-top: 1px solid var(--c-line);
  color: var(--c-ink-soft);
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 12px;
}

.footer-text {
  font-size: 13px;
  line-height: 1.7;
  margin-bottom: 12px;
}

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

.footer-links a {
  font-size: 13px;
  color: var(--c-ink-soft);
}

.footer-links a:hover,
.footer-links a:focus {
  color: var(--c-action);
}

.footer-cta {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--c-line);
}

.footer-cta-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  background: var(--c-action);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
}

.footer-cta-link:hover,
.footer-cta-link:focus {
  background: var(--c-action-dark);
  color: #ffffff;
  text-decoration: none;
}

.footer-bottom {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
}

.footer-copy {
  font-size: 12px;
  color: var(--c-ink-soft);
}

/* ------------------------------------------------------------
   components：通用按钮 / 文本链接 / 区块标题 / 卡片 / 表格 / FAQ
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: var(--c-action);
  border-color: var(--c-action);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--c-action-dark);
  border-color: var(--c-action-dark);
  color: #ffffff;
  text-decoration: none;
}

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

.btn-ghost:hover,
.btn-ghost:focus {
  border-color: var(--c-ink);
  color: var(--c-ink);
  text-decoration: none;
}

.text-link {
  color: var(--c-action);
  font-size: 14px;
  font-weight: 700;
}

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

/* 区块通用 */
.section {
  margin-bottom: 56px;
}

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

.section-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-desc,
.section-intro,
.section-lead {
  max-width: 820px;
  color: var(--c-ink-soft);
  font-size: 15px;
  margin-bottom: 20px;
}

.section-foot {
  margin-top: 20px;
}

.section-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* 编号与字段标签 */
.channel-code,
.step-index,
.flow-index,
.record-date,
.record-type,
.quick-code,
.meta-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink-soft);
}

/* 图片容器 */
.hero-figure,
.collection-figure,
.section-media,
.records-figure,
.records-intro-media,
.media-figure {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--c-surface);
}

.hero-figure img,
.collection-figure img,
.section-media img,
.records-figure img,
.records-intro-media img,
.media-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-caption {
  padding: 10px 2px 0;
  font-size: 13px;
  color: var(--c-ink-soft);
}

/* 频道行（首页 / 频道分类页共用） */
.channel-rows {
  border-top: 1px solid var(--c-line);
}

.channel-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  align-items: start;
  gap: 16px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--c-line);
}

.channel-code {
  padding-top: 2px;
}

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

.channel-name {
  font-size: 18px;
  margin-bottom: 4px;
}

.channel-scope {
  color: var(--c-ink-soft);
  font-size: 15px;
}

.channel-entry {
  align-self: center;
  padding: 4px 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--c-ink-soft);
  white-space: nowrap;
}

/* 片单卡 */
.collection-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

.collection-card {
  display: flex;
  flex-direction: column;
  padding: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
  box-shadow: var(--shadow-card);
}

.collection-figure {
  aspect-ratio: 16 / 9;
  margin-bottom: 14px;
}

.collection-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.collection-desc {
  color: var(--c-ink-soft);
  font-size: 15px;
  margin-bottom: 12px;
}

.collection-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
}

.collection-meta dt {
  color: var(--c-ink-soft);
}

.collection-meta dd {
  margin: 0;
  color: var(--c-ink);
  font-family: var(--font-mono);
}

.collection-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

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

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

/* 步骤条（首页 / 片单 / 指引共用基础样式） */
.step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap);
}

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

.step-index {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--c-action);
  font-weight: 700;
}

.step-name {
  font-size: 18px;
  margin-bottom: 6px;
}

.step-note,
.step-desc {
  color: var(--c-ink-soft);
  font-size: 15px;
}

.step-check {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--c-line);
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* 字段说明与边界 */
.field-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: var(--gap);
}

.field-column,
.boundary-column {
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
}

.field-subtitle {
  font-size: 18px;
  margin-bottom: 14px;
}

.field-list {
  margin: 0;
}

.field-term {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink);
  padding-top: 10px;
}

.field-def {
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink-soft);
  font-size: 15px;
}

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

.boundary-item {
  position: relative;
  padding-left: 18px;
  color: var(--c-ink-soft);
  font-size: 15px;
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-action);
}

.boundary-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* 整理记录分组 */
.record-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
}

.record-group {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
}

.record-month {
  font-size: 18px;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}

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

.record-item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 8px 12px;
  font-size: 14px;
}

.record-date {
  white-space: nowrap;
}

.record-target {
  color: var(--c-ink);
}

.record-type {
  justify-self: end;
  padding: 1px 8px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.record-type-add {
  color: var(--c-action);
  border-color: rgba(31, 94, 255, 0.35);
}

.record-type-adjust {
  color: var(--c-ink-soft);
}

.record-type-remove {
  color: #b3261e;
  border-color: rgba(179, 38, 30, 0.3);
}

.record-reason {
  grid-column: 2 / -1;
  color: var(--c-ink-soft);
  font-size: 13px;
}

/* 站内栏目索引 */
.index-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.index-cell {
  padding: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.index-name {
  font-size: 16px;
  margin-bottom: 6px;
}

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

/* 数据表格 */
.data-table {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.table-caption {
  padding: 12px 14px;
  text-align: left;
  font-size: 14px;
  color: var(--c-ink-soft);
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

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

.data-table thead th {
  background: var(--c-surface);
  color: var(--c-ink);
  font-weight: 700;
  white-space: nowrap;
}

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

.cell-name {
  font-weight: 700;
  color: var(--c-ink);
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-question {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  color: var(--c-action);
}

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

.faq-answer {
  padding: 0 16px 16px;
  color: var(--c-ink-soft);
  font-size: 15px;
}

/* ------------------------------------------------------------
   pages：首页
   ------------------------------------------------------------ */
.lead-strip {
  background: var(--c-ink);
  color: #ffffff;
}

.lead-strip-text {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 10px 24px;
  font-size: 13px;
  line-height: 1.6;
}

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

.hero {
  padding: 48px 0 56px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 56px;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 1fr);
  gap: 48px;
  align-items: start;
}

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

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-action);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 32px;
  margin-bottom: 16px;
}

.hero-text {
  max-width: 620px;
  color: var(--c-ink-soft);
  font-size: 16px;
  margin-bottom: 12px;
}

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

.hero-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.hero-quick {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.hero-quick-title {
  font-size: 16px;
  margin-bottom: 12px;
}

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

.quick-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
}

.quick-code {
  color: var(--c-action);
}

.quick-name {
  color: var(--c-ink-soft);
}

.section-channels .section-foot,
.section-collections .section-foot,
.section-steps .section-foot,
.section-records .section-foot {
  border-top: 1px solid var(--c-line);
  padding-top: 16px;
}

.records-figure {
  margin-top: 24px;
  aspect-ratio: 21 / 9;
}

/* ------------------------------------------------------------
   pages：频道分类
   ------------------------------------------------------------ */
.page-channels .section-channel-table .channel-rows {
  border-top: 1px solid var(--c-line);
}

.page-channels .channel-row {
  grid-template-columns: 72px minmax(0, 1fr) auto;
}

.section-media {
  aspect-ratio: 16 / 7;
  margin-bottom: 24px;
}

.scope-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--c-line);
}

.scope-title {
  font-size: 18px;
  margin-bottom: 6px;
}

.scope-text {
  color: var(--c-ink-soft);
  font-size: 15px;
  max-width: 860px;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap);
}

.flow-step {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.flow-index {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--c-action);
  font-weight: 700;
}

.flow-name {
  font-size: 18px;
  margin-bottom: 6px;
}

.flow-note {
  color: var(--c-ink-soft);
  font-size: 15px;
}

.flow-footnote {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 14px;
}

/* ------------------------------------------------------------
   pages：专题片单
   ------------------------------------------------------------ */
.collections-overview .collection-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.collections-composition .data-table {
  margin-top: 8px;
}

.collections-flow .flow-list {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.flow-entry {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.flow-entry-text {
  color: var(--c-ink-soft);
  font-size: 15px;
  max-width: 860px;
}

.flow-entry-text + .flow-entry-text {
  margin-top: 10px;
}

/* ------------------------------------------------------------
   pages：浏览指引
   ------------------------------------------------------------ */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 56px;
}

.guide-steps .step-list {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.guide-steps .section-media {
  aspect-ratio: 16 / 7;
  margin-bottom: 24px;
}

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

.prepare-col {
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
}

.prepare-title {
  font-size: 18px;
  margin-bottom: 12px;
}

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

.prepare-list li {
  position: relative;
  padding-left: 18px;
  color: var(--c-ink-soft);
  font-size: 15px;
}

.prepare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-action);
}

.return-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.return-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
  font-size: 15px;
}

.return-note {
  color: var(--c-ink-soft);
  font-size: 13px;
  white-space: nowrap;
}

/* ------------------------------------------------------------
   pages：整理记录
   ------------------------------------------------------------ */
.records-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: center;
  margin-bottom: 56px;
}

.records-intro-media {
  aspect-ratio: 4 / 3;
}

.records-intro-text p {
  color: var(--c-ink-soft);
  font-size: 15px;
  margin-bottom: 12px;
}

.records-months {
  margin-bottom: 56px;
}

.records-months .record-groups {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.records-months .record-item {
  grid-template-columns: 84px minmax(0, 1fr) auto;
}

.records-legend {
  margin-bottom: 56px;
}

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

.legend-col {
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
}

.legend-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.legend-col p {
  color: var(--c-ink-soft);
  font-size: 15px;
}

.records-check {
  margin-bottom: 56px;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
}

.check-item {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.check-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.check-item p {
  color: var(--c-ink-soft);
  font-size: 15px;
}

.records-links {
  margin-bottom: 8px;
}

.link-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.link-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
}

.link-card a {
  font-size: 16px;
  font-weight: 700;
}

.link-card span {
  color: var(--c-ink-soft);
  font-size: 14px;
}

/* ------------------------------------------------------------
   pages：404
   ------------------------------------------------------------ */
.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px 24px;
}

.error-hero {
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 48px;
  margin-bottom: 48px;
}

.error-hero-inner {
  max-width: 720px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-action);
  margin-bottom: 12px;
}

.error-title {
  font-size: 32px;
  margin-bottom: 14px;
}

.error-text {
  color: var(--c-ink-soft);
  font-size: 16px;
}

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

.error-route-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
}

.error-route-item {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.error-route-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.error-route-text {
  color: var(--c-ink-soft);
  font-size: 15px;
}

/* ------------------------------------------------------------
   responsive：1024px / 768px / 480px
   ------------------------------------------------------------ */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .record-groups,
  .records-months .record-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 60px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-link {
    width: 100%;
    padding: 0 8px;
  }

  .nav-link.is-current {
    box-shadow: inset 2px 0 0 var(--c-action);
  }

  .lead-strip-text {
    padding: 10px 16px;
  }

  .home-main,
  .inner-main {
    padding-left: 16px;
    padding-right: 16px;
  }

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

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

  .hero {
    padding: 32px 0 40px;
    margin-bottom: 40px;
  }

  .section {
    margin-bottom: 40px;
  }

  .collection-grid,
  .collection-cards,
  .prepare-columns,
  .field-layout,
  .legend-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .record-groups,
  .records-months .record-groups {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .channel-row {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 10px 12px;
  }

  .channel-entry {
    grid-column: 2 / -1;
    justify-self: start;
  }

  .record-item,
  .records-months .record-item {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .record-target {
    grid-column: 1 / -1;
  }

  .record-reason {
    grid-column: 1 / -1;
  }

  .footer-inner {
    padding: 32px 16px 20px;
  }

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

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

  .flow-footnote {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .brand-note {
    display: none;
  }

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

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

  .return-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .data-table th,
  .data-table td {
    padding: 10px;
    font-size: 13px;
  }
}