/* ==========================================================================
   91漫画18下载 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base
   -------------------------------------------------------------------------- */
:root {
  --c-indigo: #1f3a68;
  --c-indigo-deep: #16294a;
  --c-steel: #3d5c86;
  --c-brick: #bf5527;
  --c-paper: #f7f6f1;
  --c-card: #ffffff;
  --c-line: #d7d3c8;
  --c-line-soft: #e6e2d8;
  --c-ink: #20242b;
  --c-ink-soft: #5c636e;
  --radius: 4px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 0 rgba(31, 58, 104, 0.04);
  --font-base: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --w-shell: 1120px;
  --w-main: 820px;
  --w-side: 260px;
  --gap-side: 32px;
}

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

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

body {
  margin: 0;
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-base);
  font-size: 15px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}

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

p {
  margin: 0;
}

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

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

a {
  color: var(--c-steel);
  text-decoration: none;
  transition: color 150ms ease, border-color 150ms ease, background-color 150ms ease;
}

a:hover {
  color: var(--c-brick);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--c-brick);
  outline-offset: 2px;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

figure {
  margin: 0;
}

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

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

.site-main {
  flex: 1 0 auto;
}

/* 页头 */
.site-header {
  background: var(--c-indigo);
  border-bottom: 3px solid var(--c-indigo-deep);
  position: relative;
  z-index: 30;
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  flex: 0 0 auto;
  min-height: 44px;
}

.brand:hover {
  color: #ffffff;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border: 2px solid #ffffff;
  border-radius: 3px;
  position: relative;
  flex: 0 0 auto;
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 5px 5px auto 5px;
  height: 2px;
  background: var(--c-brick);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: auto 5px 5px 5px;
  height: 6px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 1px;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}

/* 主导航 */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-item {
  position: relative;
}

.nav-link,
.nav-toggle {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.86);
  border-radius: var(--radius);
  white-space: nowrap;
}

.nav-link:hover,
.nav-toggle:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.is-current {
  color: #ffffff;
  box-shadow: inset 0 -3px 0 var(--c-brick);
}

.nav-toggle {
  gap: 6px;
}

.nav-toggle::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 150ms ease;
}

.nav-toggle[aria-expanded="true"]::after {
  transform: rotate(180deg);
}

.nav-panel {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 320px;
  display: flex;
  gap: 26px;
  padding: 16px 20px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-brick);
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: 0 8px 20px rgba(22, 41, 74, 0.14);
  z-index: 40;
}

.nav-panel[hidden] {
  display: none;
}

.nav-panel-col {
  min-width: 128px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-panel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-brick);
  padding-bottom: 6px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--c-line-soft);
}

.nav-panel-col a {
  display: block;
  min-height: 34px;
  line-height: 34px;
  font-size: 14px;
  color: var(--c-ink);
  padding: 0 4px;
  border-radius: 3px;
}

.nav-panel-col a:hover {
  color: var(--c-brick);
  background: var(--c-paper);
}

/* 移动菜单按钮与面板 */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius);
}

.menu-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: #ffffff;
  transition: transform 150ms ease, opacity 150ms ease;
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  background: var(--c-indigo-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-list {
  padding: 8px 16px 16px;
}

.mobile-list > li > a,
.mobile-group > button {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 46px;
  padding: 0 8px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  text-align: left;
}

.mobile-list > li > a.is-current {
  color: #ffffff;
  box-shadow: inset 3px 0 0 var(--c-brick);
}

.mobile-group > button::after {
  content: "";
  margin-left: auto;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 150ms ease;
}

.mobile-group > button[aria-expanded="true"]::after {
  transform: rotate(180deg);
}

.mobile-group ul {
  padding: 4px 0 8px 14px;
}

.mobile-group ul[hidden] {
  display: none;
}

.mobile-group ul a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
}

.mobile-group ul a:hover {
  color: #ffffff;
}

/* 内容壳 */
.site-inner {
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 20px;
}

.inner-main {
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 20px 56px;
}

.home-main {
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 20px 56px;
}

/* 面包屑 */
.breadcrumb {
  font-size: 13px;
  color: var(--c-ink-soft);
  padding: 16px 0 0;
}

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

.breadcrumb-list li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-list li + li::before {
  content: "›";
  color: var(--c-line);
}

.inner-main > .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 18px 0 0;
}

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

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

/* 页面标题区 */
.page-header {
  background: var(--c-indigo);
  color: #ffffff;
  margin: 14px 0 0;
  padding: 26px 28px;
  border-left: 4px solid var(--c-brick);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  color: #ffffff;
}

/* 页脚 */
.site-footer {
  background: var(--c-indigo-deep);
  color: rgba(255, 255, 255, 0.78);
  margin-top: 8px;
}

.footer-inner {
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 40px 20px 28px;
  display: grid;
  grid-template-columns: minmax(200px, 1.4fr) repeat(3, minmax(120px, 1fr)) minmax(180px, 1.2fr);
  gap: 28px;
}

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

.footer-brand {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.68);
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.72);
}

.footer-list a:hover {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin-top: 8px;
  padding: 0 12px;
  font-size: 13px;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius);
}

.footer-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-copy,
.footer-note {
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 0 20px;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

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

.footer-note {
  padding-bottom: 20px;
}

/* 主内容 + 侧栏 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--w-side);
  gap: var(--gap-side);
  align-items: start;
  padding-top: 22px;
}

.page-layout > .inner-main {
  max-width: none;
  padding: 0 0 40px;
  min-width: 0;
}

.layout-shell > .inner-main {
  max-width: 820px;
}

.side-index {
  position: sticky;
  top: 16px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* --------------------------------------------------------------------------
   3. components
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--c-indigo);
  border-color: var(--c-steel);
}

.btn-ghost:hover {
  background: var(--c-indigo);
  color: #ffffff;
  border-color: var(--c-indigo);
}

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

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

.btn--ghost {
  background: transparent;
  color: var(--c-indigo);
  border-color: var(--c-steel);
}

.btn--ghost:hover {
  background: var(--c-indigo);
  color: #ffffff;
  border-color: var(--c-indigo);
}

.btn-sm {
  min-height: 38px;
  padding: 0 16px;
  font-size: 14px;
}

/* 小节标题 */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}

.section-num,
.section-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 22px;
  padding: 0 5px;
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-brick);
  border: 1px solid var(--c-brick);
  border-radius: 3px;
  flex: 0 0 auto;
  align-self: center;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  padding-left: 11px;
  border-left: 3px solid var(--c-brick);
  flex: 0 1 auto;
}

.section-note,
.section-desc {
  font-size: 13px;
  color: var(--c-ink-soft);
  flex: 1 1 220px;
  min-width: 0;
}

/* 标签 chip */
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--c-indigo);
  background: var(--c-card);
  border: 1px solid var(--c-steel);
  border-radius: var(--radius);
  white-space: nowrap;
}

.chip:hover {
  background: var(--c-indigo);
  color: #ffffff;
  border-color: var(--c-indigo);
}

.chip--sm {
  min-height: 24px;
  padding: 0 8px;
  font-size: 12px;
  color: var(--c-brick);
  border-color: var(--c-brick);
  background: transparent;
}

.chip--sm:hover {
  background: var(--c-brick);
  color: #ffffff;
  border-color: var(--c-brick);
}

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

/* 状态标记 */
.status-mark {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 7px;
  font-size: 12px;
  color: var(--c-brick);
  border: 1px solid var(--c-brick);
  border-radius: 3px;
  white-space: nowrap;
}

/* 文本链接 */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--c-steel);
  border-bottom: 1px solid rgba(61, 92, 134, 0.4);
  padding-bottom: 1px;
}

.text-link::after {
  content: "→";
  font-size: 13px;
}

.text-link:hover {
  color: var(--c-brick);
  border-bottom-color: var(--c-brick);
}

/* 数据表 */
.data-table,
.spec-table {
  width: 100%;
  font-size: 14px;
  line-height: 1.7;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.data-table caption,
.spec-table caption,
.table-caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 8px;
  font-size: 13px;
  color: var(--c-ink-soft);
}

.data-table thead th,
.spec-table thead th {
  background: var(--c-indigo);
  color: #ffffff;
  font-weight: 700;
  font-size: 13px;
  text-align: left;
  padding: 10px 12px;
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.data-table thead th:last-child,
.spec-table thead th:last-child {
  border-right: 0;
}

.data-table tbody th,
.spec-table tbody th {
  text-align: left;
  font-weight: 700;
  color: var(--c-ink);
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-line-soft);
  border-right: 1px solid var(--c-line-soft);
  background: var(--c-paper);
  white-space: nowrap;
}

.data-table tbody td,
.spec-table tbody td {
  padding: 10px 12px;
  color: var(--c-ink-soft);
  border-bottom: 1px solid var(--c-line-soft);
  border-right: 1px solid var(--c-line-soft);
}

.data-table tbody td:last-child,
.spec-table tbody td:last-child {
  border-right: 0;
}

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

.data-table tbody tr:nth-child(even) td,
.spec-table tbody tr:nth-child(even) td {
  background: #fbfaf6;
}

.table-footnote {
  font-size: 13px;
  color: var(--c-ink-soft);
  margin-top: 10px;
}

/* 图片说明 */
.media-figure,
.content-figure,
.partition-figure,
.rank-figure {
  margin: 0 0 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-card);
}

.media-figure img,
.content-figure img,
.partition-figure img,
.rank-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.media-figure figcaption,
.content-figure figcaption,
.partition-figure figcaption,
.rank-figure figcaption {
  font-size: 13px;
  color: var(--c-ink-soft);
  padding: 10px 14px;
  border-top: 1px solid var(--c-line-soft);
  background: var(--c-card);
}

/* 相关链接条 */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 26px;
  padding: 14px 16px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brick);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.related-links-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-ink);
}

.related-links-item {
  font-size: 13px;
  color: var(--c-steel);
  border-bottom: 1px solid rgba(61, 92, 134, 0.4);
}

.related-links-item:hover {
  color: var(--c-brick);
  border-bottom-color: var(--c-brick);
}

/* 侧栏 */
.side-block {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.side-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--c-line-soft);
}

.side-list {
  display: flex;
  flex-direction: column;
}

.side-list a {
  display: flex;
  align-items: center;
  min-height: 36px;
  font-size: 13px;
  color: var(--c-ink-soft);
  border-bottom: 1px dashed var(--c-line-soft);
}

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

.side-list a:hover {
  color: var(--c-brick);
}

.side-block--note p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-ink-soft);
}

/* 有序步骤（通用） */
.step-list,
.path-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: step;
}

.step-item,
.path-step,
.path-item {
  position: relative;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 16px 18px 16px 54px;
  counter-increment: step;
}

.step-item::before,
.path-step::before,
.path-item::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 16px;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-brick);
}

.step-title,
.path-title,
.step-item h3,
.path-item h3 {
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 6px;
}

.step-item p,
.path-text,
.path-item p {
  font-size: 14px;
  color: var(--c-ink-soft);
  margin-bottom: 8px;
}

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

.path-link {
  font-size: 13px;
  color: var(--c-steel);
  border-bottom: 1px solid rgba(61, 92, 134, 0.4);
}

.path-link:hover {
  color: var(--c-brick);
  border-bottom-color: var(--c-brick);
}

/* --------------------------------------------------------------------------
   4. pages
   -------------------------------------------------------------------------- */

/* ---------- 首页 ---------- */
.hero {
  padding: 34px 0 26px;
  border-bottom: 1px solid var(--c-line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 36px;
  align-items: center;
}

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

.hero-kicker {
  display: inline-block;
  font-size: 13px;
  color: var(--c-brick);
  border: 1px solid var(--c-brick);
  border-radius: 3px;
  padding: 2px 10px;
  margin-bottom: 14px;
}

.hero-copy h1 {
  font-size: 30px;
  line-height: 1.32;
  color: var(--c-indigo);
  margin-bottom: 14px;
}

.hero-lead {
  font-size: 15px;
  color: var(--c-ink-soft);
  max-width: 560px;
  margin-bottom: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.hero-jumps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 6px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
}

.hero-jumps li {
  display: inline-flex;
  align-items: center;
}

.hero-jumps li + li::before {
  content: "/";
  color: var(--c-line);
  margin: 0 8px 0 2px;
}

.hero-jumps a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 13px;
  color: var(--c-steel);
  border-bottom: 1px dashed rgba(61, 92, 134, 0.5);
}

.hero-jumps a:hover {
  color: var(--c-brick);
  border-bottom-color: var(--c-brick);
}

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

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

.hero-figure figcaption {
  font-size: 12px;
  color: var(--c-ink-soft);
  padding: 8px 12px;
  border-top: 1px solid var(--c-line-soft);
}

/* 题材标签总览 */
.tag-strip {
  padding: 26px 0 22px;
  border-bottom: 1px solid var(--c-line);
}

.tag-strip .chip-row + .chip-row {
  margin-top: 10px;
}

/* 更新与摘要 */
.update-board {
  padding: 28px 0;
  border-bottom: 1px solid var(--c-line);
}

.update-board-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 28px;
  align-items: start;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.update-row {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: border-color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.update-row:hover {
  border-color: var(--c-steel);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card);
}

.update-row-link {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  padding: 12px;
  color: var(--c-ink);
  align-items: start;
}

.update-row-link:hover {
  color: var(--c-ink);
}

.update-thumb {
  width: 76px;
  height: 114px;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 3px;
  border: 1px solid var(--c-line-soft);
  background: var(--c-paper);
}

.update-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.update-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-indigo);
}

.update-row-link:hover .update-title {
  color: var(--c-brick);
}

.update-excerpt {
  font-size: 13px;
  color: var(--c-ink-soft);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.update-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

/* 条目摘要卡 */
.summary-card {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-indigo);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
}

.summary-heading {
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 12px;
}

.summary-figure {
  border: 1px solid var(--c-line-soft);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 12px;
}

.summary-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 3;
  object-fit: cover;
}

.summary-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-ink-soft);
  margin-bottom: 12px;
}

.summary-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.summary-card .btn {
  width: 100%;
}

/* 榜单三列 */
.rank-board {
  padding: 28px 0;
  border-bottom: 1px solid var(--c-line);
}

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

.rank-column {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 14px 16px 16px;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.rank-heading {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-indigo);
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 2px solid var(--c-line);
}

.rank-list {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.rank-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  padding: 7px 0;
  border-bottom: 1px dashed var(--c-line-soft);
}

.rank-item:last-child {
  border-bottom: 0;
}

.rank-no {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-brick);
  text-align: center;
}

.rank-item a {
  font-size: 14px;
  color: var(--c-ink);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-item a:hover {
  color: var(--c-brick);
}

.rank-item .chip--sm {
  flex: 0 0 auto;
}

.rank-note {
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-ink-soft);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--c-line-soft);
}

/* 阅读路径 */
.read-path {
  padding: 28px 0;
  border-bottom: 1px solid var(--c-line);
}

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

.read-path .path-step {
  padding: 16px 18px 16px 18px;
  display: flex;
  flex-direction: column;
}

.read-path .path-step::before {
  position: static;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 24px;
  margin-bottom: 10px;
  border: 1px solid var(--c-brick);
  border-radius: 3px;
  font-size: 12px;
}

.path-step .path-title {
  margin-bottom: 6px;
}

.path-step .path-text {
  flex: 1 1 auto;
  margin-bottom: 10px;
}

/* 规则摘要与反馈 */
.rule-brief {
  padding: 28px 0 8px;
}

.rule-brief-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 28px;
  align-items: start;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: rule;
  min-width: 0;
}

.rule-item {
  counter-increment: rule;
  position: relative;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brick);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 16px 12px 46px;
}

.rule-item::before {
  content: counter(rule, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 12px;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-brick);
}

.rule-title {
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 4px;
}

.rule-text {
  font-size: 13px;
  color: var(--c-ink-soft);
}

.notice-bar {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-brick);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 0;
}

.notice-heading {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 8px;
}

.notice-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-ink-soft);
  margin-bottom: 14px;
}

/* ---------- 内页公共：标题区导语 ---------- */
.page-head {
  padding: 20px 0 4px;
}

.page-head-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px 24px;
  align-items: start;
}

.page-head-text,
.page-head-main {
  min-width: 0;
}

.page-lead,
.page-head-lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-ink-soft);
}

.page-head-tags,
.page-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  max-width: 320px;
}

.page-tags li {
  display: inline-flex;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  font-size: 12px;
  color: var(--c-indigo);
  background: var(--c-card);
  border: 1px solid var(--c-steel);
  border-radius: 3px;
  white-space: nowrap;
}

.tag--status {
  color: var(--c-brick);
  border-color: var(--c-brick);
  background: transparent;
}

/* ---------- 题材分区页 ---------- */
.partition-list {
  padding: 26px 0 6px;
}

.partition-block {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-indigo);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 18px;
  margin-bottom: 14px;
  scroll-margin-top: 16px;
}

.partition-title {
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 10px;
}

.partition-block .chip-row {
  margin-bottom: 10px;
}

.partition-tip {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.spec-table {
  margin-top: 4px;
}

.split-note {
  padding: 26px 0 4px;
}

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

.split-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.split-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 8px;
}

.split-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
  margin-bottom: 10px;
}

/* ---------- 更新速览页 ---------- */
.mark-guide {
  padding: 26px 0 6px;
}

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

.mark-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 14px 18px;
}

.mark-item dt {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-indigo);
  margin-bottom: 4px;
}

.mark-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.mark-example {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--c-line-soft);
  font-size: 13px;
  color: var(--c-ink-soft);
}

.update-groups {
  padding: 26px 0 6px;
}

.update-group {
  margin-bottom: 20px;
  scroll-margin-top: 16px;
}

.group-title {
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-indigo);
  padding-left: 10px;
  border-left: 3px solid var(--c-brick);
  margin-bottom: 10px;
}

.update-group .update-list {
  gap: 10px;
}

.update-group .update-row {
  padding: 0;
}

.update-group .update-row > a {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 12px;
  color: var(--c-ink);
  align-items: start;
}

.update-group .update-row > a:hover {
  color: var(--c-ink);
}

.update-group .update-row img {
  width: 62px;
  height: 93px;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 3px;
  border: 1px solid var(--c-line-soft);
}

.row-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.row-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-indigo);
}

.update-group .update-row > a:hover .row-title {
  color: var(--c-brick);
}

.row-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

.row-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.sort-path {
  padding: 26px 0 6px;
}

/* ---------- 读者榜单页 ---------- */
.rule-summary {
  padding: 26px 0 6px;
}

.clause-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: clause;
}

.clause-item {
  counter-increment: clause;
  position: relative;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-indigo);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px 14px 48px;
}

.clause-item::before {
  content: counter(clause, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 14px;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--c-brick);
}

.clause-item h3,
.clause-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 4px;
}

.clause-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.rank-groups {
  padding: 26px 0 6px;
}

.rank-group {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 14px 18px 16px;
  margin-bottom: 16px;
  scroll-margin-top: 16px;
}

.rank-group-title {
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-indigo);
  padding-bottom: 8px;
  margin-bottom: 6px;
  border-bottom: 2px solid var(--c-line);
}

.rank-group .rank-item {
  grid-template-columns: 32px minmax(0, 1fr) auto;
  padding: 8px 0;
}

.rank-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rank-link {
  font-size: 14px;
  color: var(--c-ink);
  line-height: 1.5;
}

.rank-link:hover {
  color: var(--c-brick);
}

.rank-desc {
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

.rank-tag {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 7px;
  font-size: 12px;
  color: var(--c-brick);
  border: 1px solid var(--c-brick);
  border-radius: 3px;
  white-space: nowrap;
  flex: 0 0 auto;
}

.rank-footnote {
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-ink-soft);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--c-line-soft);
}

.cross-note {
  padding: 26px 0 6px;
}

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

.cross-note-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 16px 18px;
  min-width: 0;
}

.cross-note-item h3 {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 8px;
}

.cross-note-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
  margin-bottom: 10px;
}

/* ---------- 阅读指引页 ---------- */
.content-column {
  max-width: 860px;
  margin: 0 auto;
  padding: 22px 0 8px;
  min-width: 0;
}

.content-column > section + section {
  margin-top: 26px;
}

.step-path,
.setting-table,
.manual-note,
.next-links,
.content-section {
  min-width: 0;
}

.content-column .step-item {
  padding: 16px 18px 16px 54px;
}

.setting-table .spec-table {
  margin-top: 4px;
}

.manual-note > p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin-bottom: 14px;
}

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

.manual-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 14px 18px;
}

.manual-item h3 {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 4px;
}

.manual-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

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

.next-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brick);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 16px;
  min-width: 0;
}

.next-link:hover {
  border-color: var(--c-steel);
  border-left-color: var(--c-brick);
}

.next-link-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-indigo);
}

.next-link:hover .next-link-title {
  color: var(--c-brick);
}

.next-link-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-ink-soft);
}

/* ---------- 常见问题页 ---------- */
.content-col {
  max-width: 860px;
  margin: 0 auto;
  padding: 22px 0 8px;
  min-width: 0;
}

.page-section {
  margin-bottom: 26px;
  min-width: 0;
}

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

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

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

.faq-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 10px 46px 10px 16px;
  cursor: pointer;
  position: relative;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-indigo);
  list-style: none;
}

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

.faq-summary::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -6px;
  border-right: 2px solid var(--c-brick);
  border-bottom: 2px solid var(--c-brick);
  transform: rotate(45deg);
  transition: transform 150ms ease;
}

.faq-item[open] .faq-summary::after {
  transform: rotate(-135deg);
  margin-top: -2px;
}

.faq-title {
  flex: 1 1 auto;
  min-width: 0;
  line-height: 1.5;
}

.faq-summary .tag {
  flex: 0 0 auto;
}

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

.faq-line {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin-top: 10px;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.info-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-indigo);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.info-item strong {
  display: block;
  font-size: 14px;
  color: var(--c-indigo);
  margin-bottom: 2px;
}

.page-section .notice-bar {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
  border-top: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brick);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 16px;
}

.page-section .notice-bar .text-link {
  margin-left: 4px;
}

.next-desc {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin-bottom: 14px;
}

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

/* ---------- 站点规则页 ---------- */
.content-section {
  margin-bottom: 26px;
}

.content-section .section-head {
  margin-bottom: 12px;
}

.content-section .section-head .section-num {
  margin-right: 8px;
}

.section-intro {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin-bottom: 14px;
}

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

.usage-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 14px 18px;
}

.usage-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 4px;
}

.usage-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.content-section .step-item p a {
  border-bottom: 1px solid rgba(61, 92, 134, 0.4);
}

.content-section .step-item p a:hover {
  color: var(--c-brick);
  border-bottom-color: var(--c-brick);
}

.content-section .section-note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-ink-soft);
  margin-top: 10px;
}

.example-box {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brick);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px;
  margin-bottom: 14px;
}

.example-title {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-indigo);
  margin-bottom: 8px;
}

.example-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-brick);
  margin-top: 8px;
}

.example-label + p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-soft);
}

.next-link-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.next-link-list li {
  min-width: 0;
}

.next-link-list a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--c-indigo);
  background: var(--c-card);
  border: 1px solid var(--c-steel);
  border-radius: var(--radius);
  text-align: center;
}

.next-link-list a:hover {
  background: var(--c-indigo);
  color: #ffffff;
  border-color: var(--c-indigo);
}

/* ---------- 404 ---------- */
.error-main {
  width: 100%;
  max-width: var(--w-shell);
  margin: 0 auto;
  padding: 56px 20px 72px;
}

.error-block {
  max-width: 620px;
  margin: 0 auto;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-top: 4px solid var(--c-indigo);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
}

.error-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 44px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-brick);
  margin-bottom: 10px;
}

.error-title {
  font-size: 22px;
  line-height: 1.4;
  color: var(--c-indigo);
  margin-bottom: 10px;
}

.error-text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin-bottom: 20px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 10px;
  margin-bottom: 22px;
}

.error-links a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  font-size: 13px;
  color: var(--c-steel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.error-links a:hover {
  color: var(--c-brick);
  border-color: var(--c-brick);
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  font-size: 15px;
  color: #ffffff;
  background: var(--c-indigo);
  border: 1px solid var(--c-indigo);
  border-radius: var(--radius);
}

.error-btn:hover {
  background: var(--c-indigo-deep);
  border-color: var(--c-indigo-deep);
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   5. responsive
   -------------------------------------------------------------------------- */

/* 平板：1024px 以下 */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 26px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .update-board-inner,
  .rule-brief-inner {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 22px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 232px;
    gap: 24px;
  }

  .footer-inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .footer-col--about {
    grid-column: 1 / -1;
  }

  .footer-col--updates {
    grid-column: auto;
  }

  .rank-columns {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

/* 手机：720px 以下 */
@media (max-width: 720px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 0 14px;
    min-height: 58px;
    gap: 12px;
  }

  .brand-name {
    font-size: 16px;
  }

  .site-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
    margin-left: auto;
  }

  .mobile-menu:not([hidden]) {
    display: block;
  }

  .site-inner,
  .inner-main,
  .home-main,
  .footer-inner,
  .footer-copy,
  .footer-note,
  .error-main {
    padding-left: 14px;
    padding-right: 14px;
  }

  .inner-main,
  .home-main {
    padding-bottom: 40px;
  }

  .page-header {
    padding: 18px 16px;
    margin-top: 12px;
    border-left-width: 3px;
  }

  .page-title {
    font-size: 22px;
  }

  .breadcrumb {
    font-size: 12px;
    padding-top: 12px;
  }

  .inner-main > .breadcrumb {
    padding-top: 14px;
  }

  /* 首页首屏 */
  .hero {
    padding: 22px 0 20px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .hero-copy h1 {
    font-size: 22px;
    line-height: 1.38;
  }

  .hero-lead {
    font-size: 14px;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 140px;
    min-height: 44px;
  }

  .hero-jumps {
    gap: 4px;
  }

  .hero-jumps li + li::before {
    margin: 0 6px 0 0;
  }

  .hero-figure img {
    aspect-ratio: 3 / 2;
  }

  /* 标签 */
  .tag-strip {
    padding: 20px 0 18px;
  }

  .chip {
    min-height: 34px;
    padding: 0 10px;
    font-size: 13px;
  }

  /* 更新与摘要 */
  .update-board {
    padding: 22px 0;
  }

  .update-board-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .update-row-link {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 12px;
    padding: 10px;
  }

  .update-thumb {
    width: 64px;
    height: 96px;
  }

  .summary-card {
    padding: 14px;
  }

  .summary-figure img {
    aspect-ratio: 3 / 2;
  }

  /* 榜单 */
  .rank-board {
    padding: 22px 0;
  }

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

  .rank-item a {
    white-space: normal;
  }

  /* 阅读路径 */
  .read-path {
    padding: 22px 0;
  }

  .read-path .path-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* 规则摘要 */
  .rule-brief {
    padding: 22px 0 4px;
  }

  .rule-brief-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  /* 内页标题区 */
  .page-head {
    padding: 16px 0 2px;
  }

  .page-head-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .page-head-tags,
  .page-tags {
    justify-content: flex-start;
    max-width: none;
  }

  .page-lead,
  .page-head-lead {
    font-size: 14px;
  }

  /* 主内容 + 侧栏 */
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding-top: 16px;
  }

  .page-layout > .inner-main {
    padding-bottom: 8px;
  }

  .layout-shell > .inner-main {
    max-width: none;
  }

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

  /* 分区页 */
  .partition-list {
    padding: 20px 0 4px;
  }

  .partition-block {
    padding: 14px;
    margin-bottom: 12px;
  }

  .split-note {
    padding: 20px 0 2px;
  }

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

  /* 表格：横向滚动容器 */
  .data-table,
  .spec-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: normal;
    font-size: 13px;
  }

  .data-table thead,
  .spec-table thead {
    white-space: nowrap;
  }

  .data-table tbody th,
  .data-table tbody td,
  .spec-table tbody th,
  .spec-table tbody td {
    padding: 9px 10px;
    min-width: 92px;
  }

  .data-table tbody th,
  .spec-table tbody th {
    min-width: 84px;
  }

  /* 更新速览 */
  .mark-guide,
  .update-groups,
  .sort-path {
    padding: 20px 0 4px;
  }

  .update-group .update-row > a {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 10px;
    padding: 10px;
  }

  .update-group .update-row img {
    width: 56px;
    height: 84px;
  }

  /* 榜单页 */
  .rule-summary,
  .rank-groups,
  .cross-note {
    padding: 20px 0 4px;
  }

  .rank-group {
    padding: 12px 14px 14px;
  }

  .rank-group .rank-item {
    grid-template-columns: 28px minmax(0, 1fr);
    row-gap: 4px;
  }

  .rank-group .rank-item .rank-tag {
    grid-column: 2 / 3;
    justify-self: start;
  }

  .cross-note-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* 阅读指引 */
  .content-column,
  .content-col {
    padding: 16px 0 4px;
  }

  .content-column > section + section {
    margin-top: 20px;
  }

  .step-item,
  .path-step,
  .path-item {
    padding: 14px 14px 14px 46px;
  }

  .step-item::before,
  .path-step::before,
  .path-item::before {
    left: 14px;
    top: 14px;
  }

  .next-links-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  /* 常见问题 */
  .page-section {
    margin-bottom: 20px;
  }

  .faq-summary {
    flex-wrap: wrap;
    gap: 6px 10px;
    padding: 10px 42px 10px 14px;
    font-size: 15px;
  }

  .faq-summary::after {
    right: 16px;
  }

  .faq-body {
    padding: 0 14px 12px;
  }

  .faq-line {
    font-size: 14px;
  }

  .info-item {
    padding: 11px 14px;
  }

  .page-section .notice-bar {
    padding: 12px 14px;
  }

  /* 规则页 */
  .content-section {
    margin-bottom: 20px;
  }

  .clause-item {
    padding: 12px 14px 12px 42px;
  }

  .clause-item::before {
    left: 12px;
    top: 12px;
  }

  .next-link-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .next-link-list a {
    min-height: 44px;
  }

  .example-box {
    padding: 12px 14px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding-top: 28px;
    padding-bottom: 22px;
  }

  .footer-col--about {
    grid-column: auto;
  }

  .footer-list a {
    min-height: 40px;
  }

  .footer-link {
    min-height: 40px;
  }

  .footer-copy,
  .footer-note {
    font-size: 12px;
  }

  /* 404 */
  .error-main {
    padding-top: 34px;
    padding-bottom: 48px;
  }

  .error-block {
    padding: 24px 18px;
  }

  .error-code {
    font-size: 36px;
  }

  .error-title {
    font-size: 19px;
  }
}

/* 极窄屏微调 */
@media (max-width: 380px) {
  .brand-name {
    font-size: 15px;
  }

  .hero-copy h1 {
    font-size: 20px;
  }

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

  .update-row-link {
    grid-template-columns: 56px minmax(0, 1fr);
  }

  .update-thumb {
    width: 56px;
    height: 84px;
  }
}

/* 动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .update-row:hover {
    transform: none;
  }
}