/* ============================================================
   base / 基础变量与全局重置
   ============================================================ */
:root {
  --color-ink: #1a1d1e;
  --color-bg: #f4f5f7;
  --color-accent: #ffb300;
  --color-link: #0078d4;
  --color-card: #ffffff;
  --color-muted: #5f666a;
  --color-border: #dfe2e6;
  --radius: 8px;
  --container: 1180px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: #005a9e;
}

ul,
ol {
  list-style: none;
}

/* 键盘焦点可见双层轮廓 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(255, 179, 0, 0.55);
}

/* ============================================================
   layout / 全站共享布局骨架
   ============================================================ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.2;
}

.brand a {
  color: var(--color-ink);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  width: 48px;
  height: 44px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.site-nav .nav-list {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-list a {
  display: block;
  padding: 8px 12px;
  color: var(--color-ink);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-list a:hover {
  background: var(--color-bg);
  color: var(--color-link);
}

.nav-list a.is-current {
  background: var(--color-accent);
  color: var(--color-ink);
  font-weight: 600;
}

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

.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 24px 56px;
  width: 100%;
}

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

/* 面包屑 */
.breadcrumb {
  font-size: 0.875rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

.breadcrumb-sep {
  color: var(--color-muted);
  margin: 0 2px;
}

.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 500;
}

/* 页面标题区 */
.page-header {
  margin-bottom: 36px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.page-description {
  font-size: 1.05rem;
  color: var(--color-muted);
  max-width: 720px;
}

/* 页脚 */
.site-footer {
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  margin-top: 32px;
}

.footer-columns {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.4fr;
  gap: 40px;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-ink);
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.925rem;
}

.footer-col a:hover {
  color: var(--color-link);
  text-decoration: underline;
}

.copyright {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ============================================================
   components / 通用组件
   ============================================================ */
/* 卡片通用 */
.board-card,
.fanwork-card,
.recommend-card,
.category-card,
.board-detail-card,
.rec-card,
.topic-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.board-card:hover,
.recommend-card:hover,
.category-card:hover,
.board-detail-card:hover,
.rec-card:hover,
.topic-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(26, 29, 30, 0.08);
}

/* 区块标题通用 */
section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}

/* 图片容器约束 */
figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   index / 首页专属模块
   ============================================================ */
/* 首屏操作面板 */
.hero-panel {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 48px;
}

.hero-intro h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 12px;
  color: var(--color-ink);
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  max-width: 520px;
}

.btn-post {
  display: inline-flex;
  align-items: center;
  background: var(--color-accent);
  color: var(--color-ink);
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius);
  text-decoration: none;
  margin-bottom: 20px;
}

.btn-post:hover {
  background: #e0a000;
  color: var(--color-ink);
}

.hero-intro img {
  width: 100%;
  max-height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
}

/* 右侧最新讨论时间轴 */
.latest-discuss {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 24px;
}

.latest-discuss h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.timeline-compact {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 16px;
}

.timeline-compact li {
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
}

.topic-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
}

.topic-title a {
  color: var(--color-ink);
  text-decoration: none;
}

.topic-title a:hover {
  color: var(--color-link);
}

.topic-meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 4px;
}

.link-more {
  font-size: 0.9rem;
  font-weight: 500;
}

/* 版块入口网格 */
.board-grid {
  margin-bottom: 48px;
}

.board-grid > h2 {
  margin-bottom: 20px;
}

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

.board-card {
  padding: 24px;
}

.board-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.board-card h3 a {
  color: var(--color-ink);
  text-decoration: none;
}

.board-card h3 a:hover {
  color: var(--color-link);
}

.board-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* 同人创作精选 */
.fanwork-grid {
  margin-bottom: 48px;
}

.fanwork-grid > h2 {
  margin-bottom: 20px;
}

.fanwork-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.fanwork-card {
  margin: 0;
}

.fanwork-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.fanwork-card figcaption {
  padding: 16px;
}

.fanwork-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.tag {
  display: inline-block;
  font-size: 0.8rem;
  background: var(--color-bg);
  color: var(--color-muted);
  padding: 2px 10px;
  border-radius: 20px;
}

/* 活动公告 */
.activity-list {
  margin-bottom: 48px;
}

.activity-list > h2 {
  margin-bottom: 16px;
}

.activity-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.activity-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.activity-date {
  font-size: 0.85rem;
  color: var(--color-muted);
  white-space: nowrap;
  font-weight: 500;
}

.activity-text {
  font-size: 0.95rem;
}

.activity-text a {
  color: var(--color-ink);
  font-weight: 500;
}

.activity-text a:hover {
  color: var(--color-link);
}

/* 热门动漫推荐预览 */
.recommend-preview {
  margin-bottom: 48px;
}

.recommend-preview > h2 {
  margin-bottom: 20px;
}

.recommend-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.recommend-card {
  padding: 24px;
}

.recommend-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.recommend-card h3 a {
  color: var(--color-ink);
  text-decoration: none;
}

.recommend-card h3 a:hover {
  color: var(--color-link);
}

.recommend-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* 社区规则摘要与发帖引导 */
.rule-summary {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.rule-summary h2 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.rule-summary p {
  color: var(--color-muted);
  font-size: 0.95rem;
  max-width: 640px;
}

.rule-summary p a {
  font-weight: 500;
}

.btn-guide {
  display: inline-flex;
  align-items: center;
  background: var(--color-ink);
  color: #fff;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
}

.btn-guide:hover {
  background: #333;
  color: #fff;
}

/* ============================================================
   boards / 版块总览页
   ============================================================ */
.board-table-section {
  margin-bottom: 48px;
}

.board-table-section > h2 {
  margin-bottom: 16px;
}

.content-media {
  margin: 20px 0;
}

.content-media-inline {
  max-width: 720px;
}

.content-media-inline img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius);
}

.content-media figcaption {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 8px;
  text-align: center;
}

.table-wrap {
  overflow-x: auto;
  margin: 20px 0;
}

.board-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: var(--color-card);
}

.board-table th,
.board-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.board-table th {
  background: var(--color-bg);
  font-weight: 600;
}

.board-table tr:last-child td {
  border-bottom: none;
}

/* 版块详情卡片 */
.board-detail-section {
  margin-bottom: 48px;
}

.board-detail-section > h2 {
  margin-bottom: 16px;
}

.board-detail-section > p {
  color: var(--color-muted);
  margin-bottom: 20px;
  max-width: 720px;
}

.board-detail-card {
  padding: 24px;
  margin-bottom: 16px;
}

.board-detail-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.board-detail-card p {
  font-size: 0.925rem;
  color: var(--color-muted);
  margin-bottom: 6px;
  line-height: 1.6;
}

/* 相关版块 */
.related-boards {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
}

.related-boards h2 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.related-boards > p {
  color: var(--color-muted);
  font-size: 0.925rem;
  margin-bottom: 16px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links li a {
  display: inline-block;
  background: var(--color-bg);
  color: var(--color-ink);
  padding: 8px 16px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.9rem;
}

.related-links li a:hover {
  background: var(--color-accent);
  color: var(--color-ink);
}

/* ============================================================
   works / 动漫作品大全页
   ============================================================ */
.category-section {
  margin-bottom: 48px;
}

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

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.category-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.category-card-body {
  padding: 16px 20px 20px;
}

.category-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.category-desc {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* 讨论方向列表 */
.direction-section {
  margin-bottom: 48px;
}

.direction-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.direction-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.direction-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

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

.direction-links li a {
  display: inline-block;
  font-size: 0.875rem;
  background: var(--color-bg);
  padding: 4px 12px;
  border-radius: 20px;
  color: var(--color-ink);
  text-decoration: none;
}

.direction-links li a:hover {
  background: var(--color-accent);
}

/* 相关链接 */
.related-intro {
  color: var(--color-muted);
  margin-bottom: 16px;
}

.related-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-list li a {
  display: inline-block;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  border-radius: var(--radius);
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.9rem;
}

.related-links-list li a:hover {
  border-color: var(--color-accent);
}

/* ============================================================
   updates / 最新番剧更新页
   ============================================================ */
.timeline-section {
  margin-bottom: 48px;
}

.section-desc {
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 720px;
}

.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
}

.timeline-marker {
  position: absolute;
  left: -29px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-card);
}

.timeline-content {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.timeline-content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.timeline-content a {
  font-size: 0.875rem;
  font-weight: 500;
}

/* 标签区 */
.tag-section {
  margin-bottom: 48px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-item {
  display: inline-block;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 8px 18px;
  border-radius: 24px;
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.9rem;
}

.tag-item:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* 媒体图 */
.media-figure {
  margin: 32px 0;
}

.media-figure img {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  border-radius: var(--radius);
}

.media-figure figcaption {
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: 8px;
}

/* 相关链接 aside */
.related-links h2 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

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

.related-links ul li a {
  color: var(--color-link);
  font-size: 0.925rem;
}

/* 底部相关链接导航 */
.related-links-label {
  font-weight: 600;
  margin-right: 8px;
}

.related-links-item {
  display: inline-block;
  margin-right: 12px;
  font-size: 0.9rem;
}

/* ============================================================
   recommendations / 热门动漫推荐页
   ============================================================ */
.recommendation-cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 48px;
}

.recommendation-cards > h2 {
  margin-bottom: 4px;
}

.rec-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
}

.rec-media img {
  width: 100%;
  height: 100%;
  min-height: 180px;
  object-fit: cover;
}

.rec-body {
  padding: 24px 28px;
}

.rec-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.rec-body p {
  font-size: 0.925rem;
  color: var(--color-muted);
  margin-bottom: 8px;
  line-height: 1.65;
}

/* 相关链接 */
.related-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.related-list li a {
  color: var(--color-link);
  font-size: 0.95rem;
}

/* ============================================================
   story / 动漫剧情介绍页
   ============================================================ */
.story-topics-section {
  margin-bottom: 48px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.topic-card a {
  text-decoration: none;
  color: var(--color-ink);
  display: block;
}

.topic-card a:hover {
  color: var(--color-ink);
}

.topic-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.topic-card-body {
  padding: 16px 20px 20px;
}

.topic-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.topic-card-body p {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* 分类入口 */
.story-category-section {
  margin-bottom: 48px;
}

.story-category-section > p {
  color: var(--color-muted);
  margin-bottom: 16px;
}

.category-link-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.category-link-list li a {
  display: block;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 10px 16px;
  border-radius: var(--radius);
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.925rem;
}

.category-link-list li a:hover {
  border-color: var(--color-accent);
  background: var(--color-accent);
}

/* 相关讨论入口 */
.story-related-links {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.story-related-links p {
  font-size: 0.925rem;
  color: var(--color-muted);
}

.story-related-links a {
  display: inline-block;
  margin-right: 16px;
  margin-top: 8px;
}

/* ============================================================
   guide / 社区指南页
   ============================================================ */
.guide-section {
  margin-bottom: 48px;
}

.guide-section > p {
  color: var(--color-muted);
  margin-bottom: 20px;
  max-width: 720px;
}

/* 步骤列表 */
.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-ink);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 12px;
}

.step-content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.step-content p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}

.step-content a {
  font-size: 0.875rem;
  font-weight: 500;
}

/* 规则摘要 */
.rules-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rules-list li {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 20px;
  font-size: 0.95rem;
}

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

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

.faq-item summary {
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.975rem;
  position: relative;
  padding-right: 40px;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-muted);
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 0.925rem;
  color: var(--color-muted);
  line-height: 1.65;
}

.faq-item p a {
  font-weight: 500;
}

/* 指南配图 */
.guide-figure {
  margin: 32px 0;
}

.guide-figure img {
  width: 100%;
  max-height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
}

.guide-figure figcaption {
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: 8px;
}

/* ============================================================
   404 / 错误页
   ============================================================ */
.error-main {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
}

.error-panel {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-size: 4rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 12px;
}

.error-panel h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-desc {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.error-link {
  display: inline-block;
  background: var(--color-ink);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 500;
}

.error-link:hover {
  background: #333;
  color: #fff;
}

.error-help {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.error-help a {
  margin: 0 6px;
}

/* ============================================================
   responsive / 响应式
   ============================================================ */
@media (max-width: 960px) {
  .board-cards {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 56px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(26, 29, 30, 0.08);
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 12px 16px;
    gap: 4px;
  }

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

  .nav-list a {
    padding: 12px 16px;
    font-size: 1rem;
  }

  .hero-panel {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .hero-intro h1 {
    font-size: 1.6rem;
  }

  .fanwork-cards {
    grid-template-columns: 1fr;
  }

  .recommend-cards {
    grid-template-columns: 1fr;
  }

  .rule-summary {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }

  .timeline {
    padding-left: 24px;
  }

  .timeline-marker {
    left: -23px;
  }

  .rec-card {
    grid-template-columns: 1fr;
  }

  .rec-media img {
    max-height: 200px;
  }

  .topic-grid {
    grid-template-columns: 1fr;
  }

  .steps-list {
    grid-template-columns: 1fr;
  }

  .direction-list {
    grid-template-columns: 1fr;
  }

  .category-link-list {
    grid-template-columns: 1fr;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-col:last-child {
    grid-column: auto;
  }

  .home-main,
  .inner-main {
    padding: 20px 16px 40px;
  }

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

@media (max-width: 520px) {
  .board-cards {
    grid-template-columns: 1fr;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .hero-intro h1 {
    font-size: 1.4rem;
  }

  .hero-panel {
    padding: 20px;
  }

  .error-panel {
    padding: 32px 24px;
  }

  .error-code {
    font-size: 3rem;
  }
}