/* ==========================================================================
   九九影院大全 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础排版
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #1F3A5F;
  --color-primary-soft: #2C4E7A;
  --color-accent: #2E6E6B;
  --color-amber: #C47A2B;
  --color-bg: #F7F5F1;
  --color-card: #FFFFFF;
  --color-text: #2B2B2B;
  --color-text-soft: #5A5A5A;
  --color-border: #D9D4CC;
  --color-border-strong: #BEB7AC;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-soft: 0 1px 2px rgba(31, 58, 95, 0.06);
  --shadow-card: 0 2px 8px rgba(31, 58, 95, 0.08);
  --container: 1080px;
  --content-narrow: 720px;
  --gap-sm: 12px;
  --gap-md: 20px;
  --gap-lg: 32px;
  --gap-xl: 48px;
}

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

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  color: var(--color-primary);
  font-weight: 600;
  line-height: 1.35;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

li {
  margin-bottom: 0.35em;
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

figure {
  margin: 0;
}

dl {
  margin: 0;
}

dt {
  font-weight: 600;
}

dd {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 60;
  padding: 10px 16px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
}

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--color-primary);
  text-decoration: none;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
  color: var(--color-primary-soft);
}

.brand-name {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.4;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-item {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 10px 14px;
  color: var(--color-text);
  font-size: 15px;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: #EFEBE4;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-amber);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 10px;
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
}

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

.site-main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 56px;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 14px;
  color: var(--color-text-soft);
}

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

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

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

.page-header {
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 10px;
}

.page-description {
  max-width: var(--content-narrow);
  margin: 0;
  color: var(--color-text-soft);
  font-size: 15px;
}

.page-layout {
  display: grid;
  gap: var(--gap-lg);
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 240px minmax(0, 1fr);
}

.page-layout.layout-main-aside {
  grid-template-columns: minmax(0, 1fr) 280px;
}

.layout-content,
.content-main,
.main-column,
.content-column {
  min-width: 0;
}

.site-footer {
  background-color: var(--color-primary);
  color: #E7E4DE;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 28px 24px;
}

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

.footer-name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-intro {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: #C9C4BB;
}

.footer-back {
  margin: 0;
}

.footer-back-link {
  color: #E9C48F;
  font-size: 14px;
}

.footer-back-link:hover,
.footer-back-link:focus-visible {
  color: #FFFFFF;
}

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

.footer-col-title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-item {
  margin-bottom: 6px;
}

.footer-link {
  color: #D5D0C8;
  font-size: 14px;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.footer-copy {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 13px;
  color: #B6B1A8;
}

/* --------------------------------------------------------------------------
   components · 通用模块
   -------------------------------------------------------------------------- */
.section {
  margin-bottom: var(--gap-xl);
}

.section-head {
  margin-bottom: 20px;
}

.section-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.section-desc,
.section-intro {
  max-width: var(--content-narrow);
  margin: 0;
  color: var(--color-text-soft);
  font-size: 15px;
}

.section-foot {
  margin: 18px 0 0;
}

.section-footnote {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--color-text-soft);
}

.subsection-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.text-link {
  color: var(--color-accent);
  font-weight: 500;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--color-primary);
}

.notice-box {
  margin: 20px 0 0;
  padding: 16px 18px;
  background-color: #FDF6EA;
  border: 1px solid #EBD9BC;
  border-left: 4px solid var(--color-amber);
  border-radius: var(--radius-sm);
}

.notice-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.notice-text {
  margin: 0;
  font-size: 15px;
  color: var(--color-text);
}

.notice-list {
  margin: 0;
  padding-left: 1.2em;
}

.notice-item {
  margin-bottom: 6px;
  font-size: 15px;
}

.notice-item:last-child {
  margin-bottom: 0;
}

.topic-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: 15px;
}

.topic-table-caption,
.field-table-caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-size: 14px;
  color: var(--color-text-soft);
  background-color: #F2EEE8;
  border-bottom: 1px solid var(--color-border);
}

.topic-table th,
.topic-table td,
.field-table th,
.field-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
}

.topic-table thead th,
.field-table thead th {
  background-color: #F2EEE8;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
}

.topic-table tbody tr:last-child td,
.field-table tbody tr:last-child td {
  border-bottom: none;
}

.topic-table tbody tr:nth-child(even) td {
  background-color: #FBFAF7;
}

.figure-caption,
.media-caption {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-text-soft);
}

.media-figure,
.topic-figure,
.about-figure,
.content-figure {
  margin: 22px 0;
}

.media-figure img,
.topic-figure img,
.about-figure img,
.content-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.sidebar-desc,
.sidebar-intro,
.sidebar-note {
  font-size: 14px;
  color: var(--color-text-soft);
}

.sidebar-note {
  margin: 14px 0 0;
}

.sidebar-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar-item {
  margin-bottom: 6px;
}

.sidebar-link {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-card);
}

.sidebar-link:hover,
.sidebar-link:focus-visible {
  border-color: var(--color-accent);
  background-color: #F1F6F5;
  color: var(--color-primary);
  text-decoration: none;
}

.sidebar-block {
  margin-bottom: 24px;
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

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

.faq-list {
  margin-top: 8px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
  margin-bottom: 10px;
  overflow: hidden;
}

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

.faq-question {
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  float: right;
  font-weight: 600;
  color: var(--color-accent);
}

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

.faq-question:hover {
  background-color: #F5F2EC;
}

.faq-answer {
  padding: 12px 16px 16px;
  font-size: 15px;
  color: var(--color-text);
  border-top: 1px solid var(--color-border);
}

.faq-answer p {
  margin: 0 0 8px;
}

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

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.top-bar {
  background-color: var(--color-primary);
  color: #E7E4DE;
}

.top-bar-text {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px 24px;
  font-size: 14px;
}

.hero {
  margin-bottom: var(--gap-xl);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--gap-lg);
  align-items: center;
  padding: 40px 0 8px;
}

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

.hero-eyebrow {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-amber);
}

.hero-title {
  font-size: 30px;
  font-weight: 600;
  margin-bottom: 14px;
}

.hero-lead {
  margin: 0 0 16px;
  font-size: 16px;
  color: var(--color-text-soft);
}

.hero-points {
  margin: 0 0 22px;
  padding-left: 1.2em;
}

.hero-point {
  margin-bottom: 6px;
  font-size: 15px;
}

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

.btn {
  display: inline-block;
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-align: center;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary-soft);
  color: #FFFFFF;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: #EFEBE4;
  color: var(--color-primary);
}

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

.hero-media img {
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
}

.hero-media-caption {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-text-soft);
}

.content-media {
  margin-top: 26px;
}

.content-media img {
  width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
}

.content-media figcaption {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-text-soft);
}

.topic-table [role="row"] {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr) minmax(0, 1.4fr);
  gap: 0;
  border-bottom: 1px solid var(--color-border);
}

.topic-table [role="row"]:last-child {
  border-bottom: none;
}

.topic-row-head {
  background-color: #F2EEE8;
}

.topic-row-head .topic-cell {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
}

.topic-cell {
  padding: 12px 14px;
  font-size: 15px;
  min-width: 0;
}

.topic-cell-name {
  font-weight: 600;
  color: var(--color-primary);
}

.topic-cell-feature,
.topic-cell-organize {
  color: var(--color-text);
}

.topic-table [role="row"]:not(.topic-row-head):nth-child(even) .topic-cell {
  background-color: #FBFAF7;
}

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

.update-group {
  padding: 18px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.update-month {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.update-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.update-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 15px;
}

.update-item:last-child {
  margin-bottom: 0;
}

.update-entry {
  color: var(--color-text);
}

.update-tag {
  display: inline-block;
  padding: 1px 8px;
  font-size: 13px;
  color: var(--color-amber);
  background-color: #FBF0DE;
  border: 1px solid #EBD9BC;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

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

.ranking-card {
  padding: 18px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.ranking-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.ranking-basis {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--color-text-soft);
}

.ranking-list {
  margin: 0;
  padding-left: 1.2em;
}

.ranking-item {
  font-size: 15px;
  margin-bottom: 6px;
}

.ranking-item:last-child {
  margin-bottom: 0;
}

.fields-index-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: var(--gap-lg);
  align-items: start;
}

.fields-summary {
  min-width: 0;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.field-list {
  margin: 0;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(90px, 130px) minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.field-row:last-child {
  border-bottom: none;
}

.field-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

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

.fields-note {
  margin: 14px 0 0;
  font-size: 14px;
}

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

.page-index-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-sm);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-index-item {
  margin: 0;
}

.page-index-link {
  display: block;
  padding: 16px;
  min-height: 44px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 500;
}

.page-index-link:hover,
.page-index-link:focus-visible {
  border-color: var(--color-accent);
  background-color: #F1F6F5;
  text-decoration: none;
}

.section-notice {
  margin-bottom: var(--gap-lg);
}

/* --------------------------------------------------------------------------
   pages · 题材分类
   -------------------------------------------------------------------------- */
.layout-sidebar {
  position: sticky;
  top: 20px;
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.topic-table-section {
  margin-bottom: var(--gap-lg);
}

.topic-notes-section {
  margin-bottom: var(--gap-lg);
}

.topic-notes-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
  margin-bottom: 4px;
}

.topic-notes-col {
  min-width: 0;
}

.topic-notes-col p {
  font-size: 15px;
  margin-bottom: 12px;
}

.topic-notes-col p:last-child {
  margin-bottom: 0;
}

.topic-summary-section {
  margin-bottom: var(--gap-lg);
}

.topic-summary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.topic-summary-item {
  margin: 0;
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.summary-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.summary-count {
  margin: 0 0 6px;
  font-size: 14px;
  color: var(--color-amber);
  font-weight: 500;
}

.summary-rep {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-soft);
}

/* --------------------------------------------------------------------------
   pages · 更新线索
   -------------------------------------------------------------------------- */
.sidebar-toc {
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc-item {
  margin-bottom: 6px;
}

.toc-link {
  display: block;
  padding: 8px 10px;
  min-height: 44px;
  font-size: 14px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: #FBFAF7;
}

.toc-link:hover,
.toc-link:focus-visible {
  border-color: var(--color-accent);
  background-color: #F1F6F5;
  color: var(--color-primary);
  text-decoration: none;
}

.update-section {
  margin-bottom: var(--gap-lg);
}

.month-block {
  margin-bottom: 24px;
  padding: 18px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  scroll-margin-top: 20px;
}

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

.month-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.update-legend {
  margin-bottom: var(--gap-lg);
}

.legend-list {
  margin: 18px 0 0;
}

.legend-term {
  margin-top: 12px;
  font-size: 15px;
  color: var(--color-primary);
}

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

.legend-term:first-of-type {
  margin-top: 0;
}

.update-scope {
  margin-bottom: var(--gap-lg);
}

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

.scope-col {
  min-width: 0;
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.scope-col-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scope-text {
  margin: 0;
  font-size: 15px;
  color: var(--color-text-soft);
}

.related-nav {
  padding: 18px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.related-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-sm);
  margin: 0;
  padding: 0;
  list-style: none;
}

.related-item {
  margin: 0;
}

.related-link {
  display: block;
  padding: 12px 14px;
  min-height: 44px;
  font-size: 15px;
  color: var(--color-primary);
  background-color: #FBFAF7;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.related-link:hover,
.related-link:focus-visible {
  border-color: var(--color-accent);
  background-color: #F1F6F5;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 字段说明
   -------------------------------------------------------------------------- */
.content-section {
  margin-bottom: var(--gap-lg);
}

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

.field-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: 15px;
}

.field-table .field-name {
  width: 30%;
  font-weight: 600;
  color: var(--color-primary);
}

.field-meaning {
  font-size: 15px;
}

.scope-block {
  margin-bottom: 18px;
}

.scope-block:last-of-type {
  margin-bottom: 0;
}

.paragraph {
  font-size: 15px;
  margin-bottom: 12px;
}

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

.sidebar-steps {
  margin: 0;
  padding-left: 1.2em;
}

.sidebar-step {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 6px;
}

.sidebar-step:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   pages · 关于本站
   -------------------------------------------------------------------------- */
.about-section {
  margin-bottom: var(--gap-lg);
}

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

.about-position p {
  font-size: 15px;
}

.step-list {
  margin: 20px 0;
  padding: 0;
  list-style: none;
  counter-reset: about-step;
}

.step-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.step-item:last-child {
  border-bottom: none;
}

.step-index {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  background-color: var(--color-primary);
  border-radius: 50%;
}

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

.step-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-primary);
}

.step-text {
  margin: 0;
  font-size: 15px;
  color: var(--color-text-soft);
}

.about-scope p {
  font-size: 15px;
}

.notice-boundary {
  margin-top: 18px;
}

.about-misread p {
  font-size: 15px;
}

.sidebar-column {
  min-width: 0;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.column-role-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.column-role-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.column-role-item:last-child {
  border-bottom: none;
}

.column-role-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.column-role-link {
  color: var(--color-primary);
}

.column-role-link:hover,
.column-role-link:focus-visible {
  color: var(--color-accent);
}

.column-role-text {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-soft);
}

.sidebar-note-link {
  color: var(--color-accent);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  padding-top: 48px;
}

.error-block {
  max-width: var(--content-narrow);
  margin: 0 auto 40px;
  text-align: center;
}

.error-code {
  margin: 0 0 8px;
  font-size: 56px;
  font-weight: 600;
  color: var(--color-amber);
  line-height: 1;
}

.error-title {
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-text {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--color-text-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 22px;
}

.button-primary,
.button-ghost {
  display: inline-block;
  padding: 11px 22px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.button-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

.button-primary:hover,
.button-primary:focus-visible {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary-soft);
  color: #FFFFFF;
  text-decoration: none;
}

.button-ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-border-strong);
}

.button-ghost:hover,
.button-ghost:focus-visible {
  background-color: #EFEBE4;
  color: var(--color-primary);
  text-decoration: none;
}

.error-links {
  max-width: var(--container);
  margin: 0 auto;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-sm);
  margin: 0;
  padding: 0;
  list-style: none;
}

.error-link-item {
  margin: 0;
}

.error-link {
  display: block;
  padding: 14px 16px;
  min-height: 44px;
  font-size: 15px;
  color: var(--color-primary);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.error-link:hover,
.error-link:focus-visible {
  border-color: var(--color-accent);
  background-color: #F1F6F5;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive · 断点
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-media {
    order: -1;
  }

  .update-groups,
  .ranking-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .layout-sidebar {
    position: static;
  }

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

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

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

@media (max-width: 768px) {
  .header-inner {
    padding: 12px 16px;
  }

  .nav-toggle {
    display: flex;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 4px;
    border-top: 1px solid var(--color-border);
  }

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

  .nav-link {
    padding: 12px 10px;
    min-height: 44px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
  }

  .nav-link.is-current {
    border-bottom-color: var(--color-amber);
    background-color: #F5F2EC;
  }

  .site-main {
    padding: 0 16px 40px;
  }

  .top-bar-text {
    padding: 8px 16px;
  }

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

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

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

  .hero-inner {
    padding-top: 24px;
    gap: var(--gap-md);
  }

  .topic-table [role="row"] {
    grid-template-columns: minmax(0, 1fr);
  }

  .topic-cell-name {
    background-color: #F2EEE8;
  }

  .topic-row-head {
    display: none;
  }

  .update-groups,
  .ranking-cards,
  .topic-notes-grid,
  .topic-summary-list,
  .scope-cols,
  .related-list,
  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .step-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 32px 16px 20px;
    gap: 20px;
  }

  .footer-copy {
    padding: 14px 16px;
  }

  .topic-table,
  .field-table {
    font-size: 14px;
  }

  .topic-table th,
  .topic-table td,
  .field-table th,
  .field-table td {
    padding: 10px 12px;
  }

  .error-main {
    padding-top: 32px;
  }

  .error-code {
    font-size: 44px;
  }

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

  /* 移动端：主内容始终排在辅助侧栏之前 */
  .page-layout.sidebar-left .layout-sidebar {
    order: 2;
  }

  .page-layout.sidebar-left .layout-content,
  .page-layout.sidebar-left .content-main {
    order: 1;
  }

  .page-layout.layout-main-aside .sidebar,
  .page-layout.layout-main-aside .sidebar-column {
    order: 2;
  }

  .page-layout.layout-main-aside .main-column,
  .page-layout.layout-main-aside .content-column {
    order: 1;
  }
}

/* --------------------------------------------------------------------------
   motion · 轻量增强（不影响初始可见性）
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .btn,
  .button-primary,
  .button-ghost,
  .nav-link,
  .sidebar-link,
  .toc-link,
  .related-link,
  .page-index-link,
  .error-link,
  .faq-question {
    transition: background-color 0.18s ease, border-color 0.18s ease,
      color 0.18s ease;
  }

  .update-group,
  .ranking-card,
  .topic-summary-item,
  .scope-col,
  .month-block {
    transition: box-shadow 0.18s ease, border-color 0.18s ease;
  }

  .update-group:hover,
  .ranking-card:hover,
  .topic-summary-item:hover,
  .scope-col:hover {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-card);
  }
}