/* ==========================================================
   糖心米胡桃 · 全站样式表
   视觉方向：单色品牌风，黑白灰底 + 珊瑚橙识别色
   ========================================================== */

/* ----------------------------------------------------------
   Base · 基础变量与全局重置
   ---------------------------------------------------------- */
:root {
  --color-ink: #111111;
  --color-bg: #ffffff;
  --color-gray-bg: #f5f5f5;
  --color-accent: #ff7a5c;
  --color-accent-dark: #e86245;
  --color-muted: #666666;
  --color-line: #e5e5e5;
  --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --radius-card: 8px;
  --radius-btn: 6px;
  --space-page: 16px;
  --transition-fast: 0.2s ease;
}

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

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

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-ink);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  list-style: none;
}

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

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.4;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

/* 无障碍隐藏 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ----------------------------------------------------------
   Layout · 全站骨架容器
   ---------------------------------------------------------- */
.site-main {
  flex: 1 0 auto;
}

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

/* ----------------------------------------------------------
   Components · 通用组件
   ---------------------------------------------------------- */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-line);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-block {
  width: 100%;
}

/* 区块标题 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-desc {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 20px;
}

.section-intro {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 16px;
}

.section-lead {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 16px;
}

.text-link {
  color: var(--color-accent);
  font-weight: 600;
}

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

/* 查看更多链接 */
.more-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 14px;
}

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

/* 相关链接条 */
.related-links {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--color-line);
  margin-top: 32px;
  flex-wrap: wrap;
}

.related-links-label {
  color: var(--color-muted);
  font-size: 14px;
  flex-shrink: 0;
}

.related-links-item {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 14px;
}

.related-links-item:hover {
  text-decoration: underline;
}

/* ----------------------------------------------------------
   Components · 页头
   ---------------------------------------------------------- */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-page);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.brand-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo:hover {
  color: var(--color-ink);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

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

.nav-list li {
  flex-shrink: 0;
}

.nav-link {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  border-radius: 4px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent);
}

.nav-link.is-current {
  color: var(--color-accent);
  font-weight: 600;
}

.btn-post {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  background-color: var(--color-accent);
  color: #ffffff;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color var(--transition-fast);
}

.btn-post:hover {
  background-color: var(--color-accent-dark);
  color: #ffffff;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  position: relative;
}

.nav-toggle-icon {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  position: relative;
  transition: background-color 0.3s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  transition: transform 0.3s ease, top 0.3s ease;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ----------------------------------------------------------
   Components · 页脚
   ---------------------------------------------------------- */
.site-footer {
  background-color: var(--color-gray-bg);
  border-top: 1px solid var(--color-line);
  margin-top: 48px;
}

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

.footer-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-ink);
}

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

.footer-links a {
  font-size: 14px;
  color: var(--color-muted);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding: 16px var(--space-page);
  text-align: center;
}

.footer-bottom p {
  max-width: var(--container-width);
  margin: 0 auto;
  font-size: 13px;
  color: var(--color-muted);
}

.footer-note {
  max-width: var(--container-width);
  margin: 0 auto;
  font-size: 13px;
  color: var(--color-muted);
  padding-bottom: 16px;
}

/* ----------------------------------------------------------
   Components · 面包屑
   ---------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 12px;
  font-size: 14px;
}

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

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

.breadcrumb-sep {
  color: #bbbbbb;
}

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

/* ----------------------------------------------------------
   Components · 页面标题区
   ---------------------------------------------------------- */
.page-header {
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 720px;
}

/* ----------------------------------------------------------
   Components · 首页 Hero 区
   ---------------------------------------------------------- */
.hero-section {
  background-color: var(--color-gray-bg);
  padding: 48px 0;
}

.hero-section .hero-content,
.hero-section .hero-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-page);
}

.hero-section {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero-content {
  max-width: 520px;
}

.hero-section h1 {
  font-size: 34px;
  margin-bottom: 12px;
}

.hero-slogan {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

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

.hero-media {
  width: 100%;
}

.hero-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  object-fit: cover;
}

/* ----------------------------------------------------------
   Components · 首页任务入口
   ---------------------------------------------------------- */
.task-entry-section {
  padding: 32px 0;
}

.task-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-page);
}

.task-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  border: 1px solid transparent;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.task-item:hover {
  border-color: var(--color-accent);
  background-color: #fafafa;
}

.task-icon {
  font-size: 24px;
  line-height: 1;
}

.task-title {
  font-size: 16px;
  font-weight: 600;
}

.task-desc {
  font-size: 14px;
  color: var(--color-muted);
}

/* ----------------------------------------------------------
   Components · 字母索引条
   ---------------------------------------------------------- */
.board-index-strip {
  padding: 8px 0 24px;
}

.board-index-strip .alpha-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-page);
}

.alpha-list {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.alpha-link {
  min-width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  border-radius: 4px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.alpha-link:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

.alpha-bar .alpha-link {
  min-width: 36px;
  height: 36px;
  border: 1px solid var(--color-line);
}

/* ----------------------------------------------------------
   Components · 首页版块导航
   ---------------------------------------------------------- */
.board-nav-section {
  padding: 24px 0;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--space-page);
  padding-right: var(--space-page);
}

.board-nav-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.board-nav-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.board-nav-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.board-nav-name {
  font-size: 16px;
  font-weight: 600;
}

.board-nav-desc {
  font-size: 14px;
  color: var(--color-muted);
}

/* ----------------------------------------------------------
   Components · 首页双栏（热帖 + 公告）
   ---------------------------------------------------------- */
.home-columns {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px var(--space-page);
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
}

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

.topic-entry {
  padding: 16px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  border-left: 3px solid transparent;
  transition: border-color var(--transition-fast);
}

.topic-entry:hover {
  border-left-color: var(--color-accent);
}

.topic-entry h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.topic-entry h3 a {
  color: var(--color-ink);
}

.topic-entry h3 a:hover {
  color: var(--color-accent);
}

.topic-meta {
  display: flex;
  gap: 12px;
  font-size: 13px;
  color: var(--color-muted);
  flex-wrap: wrap;
}

.topic-board,
.topic-replies,
.topic-time {
  display: inline-flex;
  align-items: center;
}

.topic-board {
  color: var(--color-accent);
  font-weight: 500;
}

/* 侧栏公告 */
.sidebar-announce {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.announce-card,
.post-guide-card {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
}

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

.announce-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-line);
}

.announce-list li:last-child {
  border-bottom: none;
}

.announce-list a {
  font-size: 14px;
  color: var(--color-ink);
}

.announce-list a:hover {
  color: var(--color-accent);
}

.post-guide-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

/* ----------------------------------------------------------
   Components · 同人创作精选
   ---------------------------------------------------------- */
.creation-feature {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px var(--space-page);
}

.creation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.creation-card {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.creation-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

.creation-card figcaption {
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--color-muted);
}

.creation-author {
  font-weight: 500;
}

.creation-type {
  color: var(--color-accent);
}

/* ----------------------------------------------------------
   Components · 新手指南步骤条（首页）
   ---------------------------------------------------------- */
.guide-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--space-page);
}

.steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.step-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 700;
  border-radius: 50%;
  font-size: 14px;
}

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

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

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

/* ----------------------------------------------------------
   Components · 版块索引页
   ---------------------------------------------------------- */
.board-guide {
  margin-bottom: 24px;
}

.board-guide-media {
  width: 100%;
}

.board-guide-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  object-fit: cover;
}

.board-guide-media figcaption {
  padding: 8px 4px;
  font-size: 14px;
  color: var(--color-muted);
}

.alpha-index {
  margin-bottom: 32px;
}

.alpha-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 12px;
}

.board-groups {
  margin-bottom: 32px;
}

.board-group {
  margin-bottom: 28px;
  scroll-margin-top: 80px;
}

.group-title {
  font-size: 20px;
  font-weight: 700;
  padding: 10px 0;
  border-bottom: 2px solid var(--color-accent);
  margin-bottom: 16px;
  position: sticky;
  top: 64px;
  background-color: var(--color-bg);
  z-index: 10;
}

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

.board-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast);
  border: 1px solid transparent;
}

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

.board-item-info {
  flex: 1;
  min-width: 0;
}

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

.board-desc {
  font-size: 14px;
  color: var(--color-muted);
}

.board-tag {
  font-size: 13px;
  color: var(--color-accent);
  background-color: rgba(255, 122, 92, 0.1);
  padding: 2px 10px;
  border-radius: 12px;
  white-space: nowrap;
}

.board-status {
  font-size: 13px;
  color: var(--color-muted);
  white-space: nowrap;
}

/* 版块规则提示 */
.board-rules-summary {
  margin-bottom: 32px;
}

.rules-summary-card {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
  border-left: 4px solid var(--color-accent);
}

.rules-summary-card p {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 8px;
}

/* 版块相关链接 */
.board-related {
  margin-bottom: 32px;
}

.board-related .related-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  border-top: none;
  padding: 0;
  margin-top: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast);
}

.related-card:hover {
  border-color: var(--color-accent);
}

.related-card-title {
  font-size: 15px;
  font-weight: 600;
}

.related-card-desc {
  font-size: 14px;
  color: var(--color-muted);
}

/* ----------------------------------------------------------
   Components · 话题精选页
   ---------------------------------------------------------- */
.page-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.sidebar-left .page-layout {
  flex-direction: row;
}

/* 筛选侧栏 */
.filter-sidebar {
  width: 260px;
  flex-shrink: 0;
}

.sidebar-inner {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
  position: sticky;
  top: 80px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.filter-group {
  margin-bottom: 20px;
}

.filter-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.filter-select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  background-color: var(--color-bg);
  color: var(--color-ink);
}

/* 话题列表 */
.topic-list-section {
  flex: 1;
  min-width: 0;
}

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

.topic-item {
  width: 100%;
}

.topic-card {
  display: flex;
  gap: 16px;
  padding: 16px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  border-left: 3px solid transparent;
  transition: border-color var(--transition-fast);
}

.topic-card:hover {
  border-left-color: var(--color-accent);
}

.topic-card .topic-meta {
  margin-top: 8px;
}

.topic-thumbnail {
  width: 120px;
  flex-shrink: 0;
}

.topic-img {
  width: 120px;
  height: 80px;
  object-fit: cover;
  border-radius: 6px;
}

.topic-thumbnail figcaption {
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 4px;
}

/* 标签云 */
.tag-cloud-section {
  margin-top: 32px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cloud-tag {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  background-color: var(--color-gray-bg);
  border-radius: 16px;
  color: var(--color-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.cloud-tag:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* 话题相关导航 */
.topic-related-links {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line);
}

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

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

/* ----------------------------------------------------------
   Components · 糖心档案页
   ---------------------------------------------------------- */
.container {
  width: 100%;
}

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

.archive-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.archive-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.archive-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.archive-card-media {
  width: 100%;
}

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

.archive-card-body {
  padding: 16px;
}

.archive-card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.archive-card-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 10px;
}

.archive-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.archive-tags li {
  font-size: 12px;
  color: var(--color-accent);
  background-color: rgba(255, 122, 92, 0.08);
  padding: 2px 10px;
  border-radius: 12px;
}

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

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

/* 作品条目列表 */
.works-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.work-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast);
  border: 1px solid transparent;
}

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

.work-item-media {
  width: 100px;
  flex-shrink: 0;
}

.work-item-media img {
  width: 100px;
  height: 70px;
  object-fit: cover;
  border-radius: 6px;
}

.work-item-body {
  flex: 1;
  min-width: 0;
}

.work-item-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.work-item-desc {
  font-size: 14px;
  color: var(--color-muted);
}

.work-status {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
  white-space: nowrap;
}

/* 入口卡片 */
.entry-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  transition: border-color var(--transition-fast);
}

.entry-card:hover {
  border-color: var(--color-accent);
}

.entry-card-icon {
  font-size: 20px;
}

.entry-card-title {
  font-size: 15px;
  font-weight: 600;
}

.entry-card-desc {
  font-size: 14px;
  color: var(--color-muted);
}

.entry-card-text {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
}

/* ----------------------------------------------------------
   Components · 同人创作页
   ---------------------------------------------------------- */
.creation-cats {
  margin-bottom: 24px;
}

.cat-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.cat-tag {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--color-line);
  border-radius: 20px;
  color: var(--color-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

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

.cat-tag.is-active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

/* 作品网格 */
.creation-grid-section {
  margin-bottom: 32px;
}

.creation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.work-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.work-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.work-figure {
  width: 100%;
}

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

.work-info {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.work-title {
  font-size: 16px;
  font-weight: 600;
}

.work-meta {
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: var(--color-muted);
}

.work-author {
  color: var(--color-accent);
}

.work-desc {
  font-size: 14px;
  color: var(--color-muted);
  flex: 1;
}

.work-heat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--color-ink);
  font-weight: 500;
}

.heat-icon {
  font-size: 16px;
}

.work-link {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
  margin-top: 4px;
}

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

/* 投稿说明 */
.submit-note {
  margin-bottom: 32px;
}

.submit-content {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
}

.submit-content p {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 8px;
}

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

/* ----------------------------------------------------------
   Components · 新手指南页
   ---------------------------------------------------------- */
.guide-section {
  margin-bottom: 32px;
}

.guide-section .section-title {
  margin-bottom: 4px;
}

.step-grid {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

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

.four-col {
  grid-template-columns: repeat(4, 1fr);
}

.step-card {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 700;
  border-radius: 50%;
  font-size: 14px;
  margin-bottom: 12px;
}

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

.step-text {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.guide-figure {
  width: 100%;
}

.guide-img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  object-fit: cover;
}

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

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

.faq-item summary {
  padding: 16px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq-item details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-answer {
  padding: 0 16px 16px;
  font-size: 14px;
  color: var(--color-muted);
}

/* 指南相关链接 */
.guide-related {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
  margin-top: 32px;
}

.guide-related p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.related-links li {
  margin-bottom: 8px;
}

.related-links a {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
}

.related-links a:hover {
  text-decoration: underline;
}

/* 内容块 */
.content-block {
  margin-bottom: 24px;
}

.section-text {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.rule-list {
  list-style: none;
}

/* ----------------------------------------------------------
   Components · 社区公约页
   ---------------------------------------------------------- */
.rules-section {
  margin-bottom: 32px;
}

.rules-section .section-title {
  margin-bottom: 4px;
}

.rules-section .section-intro {
  margin-bottom: 16px;
}

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

.rules-list--ordered {
  counter-reset: rule-counter;
}

.rule-item {
  display: flex;
  gap: 12px;
  padding: 16px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  align-items: flex-start;
}

.rule-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 700;
  border-radius: 50%;
  font-size: 13px;
  flex-shrink: 0;
  margin-top: 2px;
}

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

.rule-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.rule-text {
  font-size: 14px;
  color: var(--color-muted);
}

/* 禁止内容清单 */
.rules-list--prohibited .rule-item {
  border-left: 3px solid var(--color-accent);
}

.rule-item--prohibited {
  border-left: 3px solid var(--color-accent) !important;
}

.rule-icon {
  font-size: 18px;
  flex-shrink: 0;
}

/* 违规处理流程 */
.enforcement-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.enforcement-step {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
  position: relative;
}

.step-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 700;
  border-radius: 50%;
  font-size: 14px;
  margin-bottom: 12px;
}

.step-content .step-title {
  margin-bottom: 4px;
}

.step-content .step-text {
  margin-bottom: 0;
}

/* 规则配图 */
.rules-figure {
  margin: 24px 0;
  width: 100%;
}

.rules-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  object-fit: cover;
}

.rules-figure figcaption {
  padding: 8px 4px;
  font-size: 14px;
  color: var(--color-muted);
}

/* 规则提示 */
.rules-note {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 16px;
  border-left: 4px solid var(--color-accent);
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-muted);
}

/* ----------------------------------------------------------
   Components · 站务反馈页
   ---------------------------------------------------------- */
.feedback-visual {
  width: 100%;
  margin-bottom: 24px;
}

.feedback-figure {
  width: 100%;
}

.feedback-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  object-fit: cover;
}

.feedback-figure figcaption {
  padding: 8px 4px;
  font-size: 14px;
  color: var(--color-muted);
}

/* 反馈类型卡片 */
.type-card-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.type-card {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
}

.type-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.type-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 6px;
}

/* 提交流程 */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.process-step {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 16px;
}

.process-step .step-num {
  margin-bottom: 8px;
}

.step-body {
  font-size: 14px;
  color: var(--color-muted);
}

.step-body strong {
  display: block;
  color: var(--color-ink);
  font-size: 15px;
  margin-bottom: 4px;
}

.process-cta {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* 回复时间说明 */
.feedback-reply {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
  margin-top: 24px;
}

.feedback-reply p {
  font-size: 14px;
  color: var(--color-muted);
}

/* 反馈页侧栏 */
.sidebar-area {
  width: 260px;
  flex-shrink: 0;
}

.sidebar-card {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-card);
  padding: 20px;
  margin-bottom: 16px;
}

.sidebar-card h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.sidebar-links li {
  margin-bottom: 8px;
}

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

.sidebar-links a:hover {
  color: var(--color-accent);
}

/* ----------------------------------------------------------
   Components · 404 页
   ---------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px var(--space-page);
}

.error-panel {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.btn-home {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-accent);
  color: #ffffff;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  transition: background-color var(--transition-fast);
}

.btn-home:hover {
  background-color: var(--color-accent-dark);
  color: #ffffff;
}

/* ----------------------------------------------------------
   Responsive · 响应式
   ---------------------------------------------------------- */
@media (max-width: 1024px) {
  .task-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .steps-row {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .type-card-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(4, 1fr);
  }

  .enforcement-steps {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (max-width: 768px) {
  /* 页头 */
  .header-shell {
    height: 56px;
  }

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

  .site-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    padding: 0;
    display: block;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px;
    gap: 0;
  }

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

  .nav-list li {
    border-bottom: 1px solid var(--color-line);
  }

  .nav-list li:last-child {
    border-bottom: none;
  }

  .nav-link {
    display: block;
    padding: 14px 8px;
    font-size: 15px;
  }

  .site-nav .btn-post {
    margin: 12px 16px;
    display: block;
    text-align: center;
  }

  /* 首页 */
  .hero-section {
    padding: 32px 0;
  }

  .hero-section h1 {
    font-size: 28px;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .task-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .task-item {
    padding: 16px;
  }

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

  .creation-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .creation-card img {
    height: 140px;
  }

  .steps-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .step-item {
    padding: 16px;
  }

  /* 版块索引页 */
  .board-item {
    flex-wrap: wrap;
    gap: 8px;
  }

  .board-item-info {
    flex-basis: 100%;
  }

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

  .group-title {
    top: 56px;
  }

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

  /* 话题精选页 */
  .page-layout {
    flex-direction: column;
    gap: 16px;
  }

  .sidebar-left .page-layout {
    flex-direction: column;
  }

  .filter-sidebar {
    width: 100%;
  }

  .sidebar-inner {
    position: static;
  }

  .topic-card {
    flex-direction: column;
    gap: 12px;
  }

  .topic-thumbnail {
    width: 100%;
  }

  .topic-img {
    width: 100%;
    height: auto;
  }

  /* 档案页 */
  .archive-cards {
    grid-template-columns: 1fr;
  }

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

  .work-item-media {
    width: 100%;
  }

  .work-item-media img {
    width: 100%;
    height: auto;
  }

  /* 创作页 */
  .cat-tags {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .cat-tag {
    white-space: nowrap;
    flex-shrink: 0;
  }

  .creation-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .work-img {
    height: 140px;
  }

  /* 指南页 */
  .two-col {
    grid-template-columns: 1fr;
  }

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

  /* 规则页 */
  .enforcement-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 反馈页 */
  .type-card-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .sidebar-area {
    width: 100%;
  }

  /* 页脚 */
  .footer-shell {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 32px var(--space-page) 16px;
  }

  .footer-bottom {
    padding: 12px var(--space-page);
  }
}

@media (max-width: 480px) {
  .task-grid {
    grid-template-columns: 1fr;
  }

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

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

  .creation-card img {
    height: 180px;
  }

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

  .four-col {
    grid-template-columns: 1fr;
  }

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

/* ----------------------------------------------------------
   A11y · 可访问性增强
   ---------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

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

/* 长文本容器限制 */
.hero-desc,
.page-description,
.section-desc,
.section-intro,
.section-lead,
.rule-text,
.board-desc,
.archive-card-desc,
.work-desc,
.submit-content p,
.feedback-reply p,
.step-text,
.faq-answer {
  word-break: break-word;
  overflow-wrap: break-word;
}

/* 主内容最小宽度保护 */
.topic-list-section,
.main-content,
.hot-topics-column {
  min-width: 0;
}

/* 侧栏在桌面端保持合理宽度 */
.sidebar-announce,
.sidebar-area {
  min-width: 0;
}