/* ============================================================
   base — 全站基础变量、reset 与骨架
   ============================================================ */
:root {
  --color-bg: #F8F9FA;
  --color-text: #212529;
  --color-text-secondary: #6C757D;
  --color-primary: #3B5BDB;
  --color-primary-dark: #2F4BB0;
  --color-accent: #F59F00;
  --color-border: #E9ECEF;
  --color-white: #FFFFFF;
  --color-card-bg: #FFFFFF;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(33, 37, 41, 0.06);
  --shadow-md: 0 4px 12px rgba(33, 37, 41, 0.08);
  --container-width: 1120px;
  --content-width: 720px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --font-mono: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo,
    monospace;
  --font-size-h1: 28px;
  --font-size-h2: 22px;
  --font-size-h3: 16px;
  --font-size-body: 15px;
  --font-size-small: 13px;
  --line-height: 1.65;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-dark);
}

ul,
ol {
  list-style: none;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.3;
  font-weight: 600;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

time {
  font-family: var(--font-mono);
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

/* ============================================================
   layout — 全站统一容器、页头、页脚、面包屑、页面标题区
   ============================================================ */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 24px;
}

.site-brand {
  flex-shrink: 0;
}

.site-brand a {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
}

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

.site-nav .nav-list li a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text);
  font-weight: 500;
  white-space: nowrap;
}

.site-nav .nav-list li a:hover {
  color: var(--color-primary);
  background-color: rgba(59, 91, 219, 0.06);
}

.site-nav .nav-list li a.is-current {
  color: var(--color-primary);
  background-color: rgba(59, 91, 219, 0.1);
  font-weight: 600;
}

.site-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 20px 48px;
  width: 100%;
}

.site-footer {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px 24px;
}

.footer-brand {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 16px;
  max-width: 640px;
  line-height: 1.6;
}

.footer-nav {
  margin-bottom: 24px;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer-nav ul li a {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.footer-nav ul li a:hover {
  color: var(--color-primary);
}

.copyright {
  font-size: 13px;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}

/* 内页统一骨架 */
.site-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.inner-main {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--color-text-secondary);
}

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

.page-header {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: var(--font-size-h1);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.page-description {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  max-width: 720px;
  line-height: 1.65;
}

/* ============================================================
   components — 全站通用组件：图片、标签、卡片、相关链接等
   ============================================================ */
.content-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-border);
}

.content-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.content-media figcaption {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  padding: 10px 14px;
  background-color: var(--color-card-bg);
  border-top: 1px solid var(--color-border);
}

.content-media-primary {
  width: 100%;
  margin-bottom: 28px;
}

.content-media-primary img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.content-media-inline {
  width: 100%;
  margin: 20px 0;
}

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

.board-tag,
.update-category {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  background-color: rgba(59, 91, 219, 0.1);
  color: var(--color-primary);
  white-space: nowrap;
}

.board-tag {
  flex-shrink: 0;
}

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

.board-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.board-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.board-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
}

.board-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
}

.board-scope {
  font-size: 13px;
  color: var(--color-text-secondary);
  display: block;
  padding-top: 4px;
}

.board-card a,
.board-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}

.board-card a::after,
.board-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.board-card a:hover::after,
.board-link:hover::after {
  transform: translateX(4px);
}

/* 相关链接条 */
.related-links {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-right: 4px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-primary);
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--color-primary);
  background-color: rgba(59, 91, 219, 0.04);
}

/* 标签切换组 */
.tab-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tab-btn,
.tab-item {
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  min-height: 40px;
  transition: all 0.2s ease;
}

.tab-btn:hover,
.tab-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.tab-btn.is-active,
.tab-item.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

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

/* 通用 section 标题 */
.section-title,
.sidebar-title,
.aside-title {
  font-size: var(--font-size-h2);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

/* 侧栏通用 */
.inner-aside,
.sidebar-area,
.sidebar-left-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  align-self: start;
}

/* ============================================================
   pages — 首页（index.html）专属样式
   ============================================================ */
.home-main {
  padding-top: 24px;
}

.community-status {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.status-text h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 8px;
}

.status-text p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: 1.65;
}

.status-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  align-self: flex-start;
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.status-action:hover {
  background-color: #E08F00;
  color: var(--color-white);
}

.home-columns {
  display: grid;
  grid-template-columns: 68% 32%;
  gap: 24px;
  align-items: start;
}

.main-column {
  display: flex;
  flex-direction: column;
  gap: 32px;
  min-width: 0;
}

.side-column {
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-width: 0;
}

/* 近期讨论时间线 */
.recent-timeline,
.board-overview,
.pinned-announce,
.latest-replies {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.recent-timeline h2,
.board-overview h2,
.pinned-announce h2,
.latest-replies h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  margin-bottom: 16px;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.timeline-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.timeline-item h3 {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 4px;
}

.timeline-item h3 a {
  color: var(--color-text);
}

.timeline-item h3 a:hover {
  color: var(--color-primary);
}

.timeline-item .meta {
  font-size: 13px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.timeline-item .meta time {
  font-family: var(--font-mono);
}

/* 置顶公告 */
.announce-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.announce-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.announce-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 14px;
  bottom: 14px;
  width: 4px;
  border-radius: 2px;
  background-color: var(--color-accent);
}

.announce-item h3 {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  flex: 1;
  min-width: 0;
}

.announce-item h3 a {
  color: var(--color-text);
}

.announce-item h3 a:hover {
  color: var(--color-primary);
}

.announce-item time {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  margin-top: 2px;
}

.pin-mark {
  display: inline-block;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  margin-top: 2px;
}

/* 最新回帖 */
.reply-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.reply-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.reply-item h3 {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
}

.reply-item h3 a {
  color: var(--color-text);
}

.reply-item h3 a:hover {
  color: var(--color-primary);
}

.reply-item p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 4px;
}

/* 规则与反馈横条 */
.rule-feedback-bar {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.bar-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.bar-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.bar-card h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.bar-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================================
   pages — 版块导航（bankuai.html）
   ============================================================ */
.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
  padding: 0 20px;
}

.page-layout .inner-main {
  padding-left: 0;
  padding-right: 0;
  min-width: 0;
}

.topic-tabs {
  margin-bottom: 24px;
}

.topic-tabs .section-title {
  font-size: var(--font-size-h2);
  font-weight: 600;
  margin-bottom: 16px;
}

.board-card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.board-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
}

.board-topic {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.board-audience {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding-top: 4px;
}

.content-figure {
  margin: 32px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-border);
}

.content-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.content-figure figcaption {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  padding: 10px 14px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* 参与说明侧栏 */
.step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}

.step-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding-top: 3px;
  min-width: 0;
}

.aside-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.aside-note a {
  color: var(--color-primary);
  font-weight: 500;
}

/* ============================================================
   pages — 热门话题（huati.html）
   ============================================================ */
.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
  padding: 0 20px;
}

.layout-shell .inner-main {
  padding-left: 0;
  padding-right: 0;
  min-width: 0;
}

.topic-range {
  margin-bottom: 24px;
}

.hot-topics {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

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

.topic-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.topic-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.topic-rank {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
  width: 32px;
  text-align: center;
  line-height: 1.4;
}

.topic-main {
  min-width: 0;
  flex: 1;
}

.topic-title {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 6px;
  line-height: 1.5;
}

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

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

.topic-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.topic-meta .board-tag {
  font-size: 12px;
}

.reply-count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.topic-figure {
  margin: 32px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-border);
}

.topic-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.topic-figure figcaption {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  padding: 10px 14px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* 热门话题侧栏 */
.recent-replies {
  display: flex;
  flex-direction: column;
}

.recent-replies .reply-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.recent-replies .reply-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.reply-topic {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
  line-height: 1.5;
}

.reply-topic a {
  color: var(--color-text);
}

.reply-topic a:hover {
  color: var(--color-primary);
}

.reply-excerpt {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 4px;
}

.time-stamp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
}

.side-links {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.side-links-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.side-links ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.side-links ul li a {
  font-size: 14px;
  color: var(--color-primary);
}

/* ============================================================
   pages — 新手指南（xinshou.html）
   ============================================================ */
.sidebar-left {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.sidebar-left .inner-main {
  padding-left: 0;
  padding-right: 0;
  min-width: 0;
}

.sidebar-box .sidebar-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.topic-tree {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
}

.topic-tree li a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.topic-tree li a:hover {
  background-color: rgba(59, 91, 219, 0.08);
  color: var(--color-primary);
}

.sidebar-subtitle {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

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

.sidebar-links li a {
  font-size: 14px;
  color: var(--color-primary);
}

.guide-section {
  margin-bottom: 32px;
}

.path-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.path-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  flex-shrink: 0;
}

.step-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 8px;
  min-width: 0;
}

.step-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

.step-link:hover {
  text-decoration: underline;
}

.guide-media {
  margin: 32px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-border);
}

.guide-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.guide-media figcaption {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  padding: 10px 14px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* 推荐版块 */
.recommend-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.recommend-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow 0.2s ease;
}

.recommend-card:hover {
  box-shadow: var(--shadow-md);
}

.related-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.card-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
}

.card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

.card-link:hover {
  text-decoration: underline;
}

/* 相关卡片（通用） */
.related-card {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.related-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.related-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.related-desc {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

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

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

/* ============================================================
   pages — 社区规则（guize.html）
   ============================================================ */
.content-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.rule-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.rule-section h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  margin-bottom: 16px;
}

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

.rule-list li {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text);
  padding-left: 20px;
  position: relative;
}

.rule-list li::before {
  content: "·";
  position: absolute;
  left: 6px;
  color: var(--color-primary);
  font-weight: 700;
}

/* 行为规范双栏 */
.rule-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.rule-col {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 16px;
}

.rule-col h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

/* 违规处理层级 */
.enforcement-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.enforcement-steps .step-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
  padding: 0 6px;
}

.rule-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* 相关入口 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

/* ============================================================
   pages — 更新动态（gengxin.html）
   ============================================================ */
.sidebar-right {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
}

.sidebar-right .inner-main {
  padding-left: 0;
  padding-right: 0;
  min-width: 0;
}

.update-feed {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.update-feed h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  margin-bottom: 16px;
}

.update-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 16px;
  transition: box-shadow 0.2s ease;
}

.update-item:hover {
  box-shadow: var(--shadow-sm);
}

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

.update-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.update-time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
}

.update-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.update-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}

.update-item a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

.update-item a:hover {
  text-decoration: underline;
}

.update-note {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-top: 24px;
}

.update-note h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.update-note p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* 近期调整重点 */
.highlight-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.highlight-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.highlight-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.highlight-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(245, 159, 0, 0.1);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
}

.highlight-list strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.highlight-list p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.aside-figure {
  margin-top: 20px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-border);
}

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

.aside-figure figcaption {
  font-size: 12px;
  color: var(--color-text-secondary);
  padding: 8px 12px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

/* ============================================================
   pages — 问题反馈（fankui.html）
   ============================================================ */
.feedback-types,
.feedback-process,
.prep-checklist {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.feedback-types h2,
.feedback-process h2,
.prep-checklist h2 {
  font-size: var(--font-size-h2);
  font-weight: 600;
  margin-bottom: 16px;
}

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

.type-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.type-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.type-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  min-width: 0;
  width: 100%;
}

.type-handle {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  padding-top: 4px;
}

/* 处理流程步骤 */
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.process-steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.process-steps .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  flex-shrink: 0;
}

.step-content {
  min-width: 0;
  flex: 1;
  width: auto;
}

.step-content h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.step-content p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  min-width: 0;
  width: auto;
}

/* 提交前准备清单 */
.checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
}

.checklist li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 10px;
}

.checklist strong {
  font-weight: 600;
  color: var(--color-text);
}

/* 相关入口 */
.related-entry {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.entry-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.entry-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.entry-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
}

.entry-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
}

.entry-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  align-self: flex-start;
}

.entry-card a:hover {
  text-decoration: underline;
}

/* ============================================================
   pages — 404 页面
   ============================================================ */
.error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 80px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  max-width: 520px;
  width: 100%;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.error-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.error-link:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

/* ============================================================
   responsive — 响应式断点
   ============================================================ */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 16px;
  }

  .site-nav .nav-list li a {
    padding: 8px 10px;
    font-size: 13px;
  }

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

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

  .rule-feedback-bar {
    grid-template-columns: 1fr;
  }

  .page-layout,
  .layout-shell,
  .sidebar-left,
  .sidebar-right {
    grid-template-columns: 1fr;
  }

  .sidebar-left .inner-main,
  .sidebar-right .inner-main,
  .page-layout .inner-main,
  .layout-shell .inner-main {
    padding-left: 0;
    padding-right: 0;
  }

  .sidebar-left-panel {
    order: 2;
  }
}

@media (max-width: 768px) {
  .site-header .header-inner {
    flex-wrap: wrap;
    min-height: 56px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    width: 100%;
  }

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

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

  .site-nav .nav-list li a {
    padding: 12px 8px;
    min-height: 44px;
    display: flex;
    align-items: center;
    border-radius: var(--radius-sm);
  }

  .site-main,
  .inner-main {
    padding: 24px 16px 40px;
  }

  .page-header {
    margin-bottom: 24px;
  }

  .home-columns {
    display: flex;
    flex-direction: column;
  }

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

  .community-status {
    padding: 24px;
  }

  .status-text h1 {
    font-size: 24px;
  }

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

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

  .related-grid,
  .related-entry {
    grid-template-columns: 1fr;
  }

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

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

  .content-media-primary img {
    height: 200px;
  }

  .content-media-inline img,
  .content-figure img,
  .topic-figure img,
  .guide-media img {
    height: 160px;
  }

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

  .footer-nav ul {
    flex-direction: column;
    gap: 8px;
  }

  .footer-nav ul li a {
    display: block;
    padding: 6px 0;
    min-height: 36px;
  }

  .topic-item {
    gap: 12px;
  }

  .topic-rank {
    width: 28px;
    font-size: 16px;
  }

  .path-step {
    padding: 16px;
  }

  .rule-feedback-bar {
    grid-template-columns: 1fr;
  }

  .bar-card {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .site-brand a {
    font-size: 18px;
  }

  .site-main,
  .inner-main {
    padding: 20px 12px 36px;
  }

  .community-status {
    padding: 20px;
  }

  .status-text h1 {
    font-size: 22px;
  }

  .status-action {
    width: 100%;
    justify-content: center;
  }

  .recent-timeline,
  .board-overview,
  .pinned-announce,
  .latest-replies {
    padding: 20px 16px;
  }

  .timeline-item {
    flex-wrap: wrap;
    gap: 8px;
  }

  .timeline-item h3 {
    width: 100%;
  }

  .announce-item {
    flex-wrap: wrap;
  }

  .announce-item h3 {
    width: calc(100% - 60px);
  }

  .topic-item {
    flex-direction: row;
  }

  .topic-main {
    min-width: 0;
  }

  .topic-meta {
    gap: 8px;
  }

  .page-header {
    padding-bottom: 16px;
  }

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

  .page-description {
    font-size: 14px;
  }

  .tab-group {
    gap: 6px;
  }

  .tab-btn,
  .tab-item {
    padding: 8px 14px;
    font-size: 13px;
  }

  .board-card {
    padding: 16px;
  }

  .rule-section,
  .feedback-types,
  .feedback-process,
  .prep-checklist,
  .hot-topics,
  .update-item {
    padding: 16px;
  }

  .type-card {
    padding: 16px;
  }

  .process-steps li {
    gap: 12px;
  }

  .step-content p {
    font-size: 14px;
  }

  .error-panel {
    padding: 32px 20px;
  }

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

  .error-panel h1 {
    font-size: 20px;
  }

  .error-link {
    width: 100%;
  }

  .path-step {
    flex-direction: column;
    gap: 10px;
  }

  .step-number {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }

  .sidebar-left-panel,
  .inner-aside,
  .sidebar-area {
    padding: 16px;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .related-links-item {
    width: 100%;
    text-align: center;
  }

  .bar-card {
    padding: 16px;
  }

  .update-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .highlight-list li {
    padding: 10px 0;
  }

  .rule-list li {
    font-size: 14px;
  }

  .checklist li {
    font-size: 14px;
  }

  .entry-card {
    padding: 16px;
  }

  .footer-nav ul li a {
    min-height: 44px;
  }

  .copyright {
    font-size: 12px;
  }
}