/* ============================================================
   漫蛙 Manwa 漫画爱好者论坛 · 全站样式表
   清晰编辑风：白底、深色正文、克制强调色、紧凑信息密度
   ============================================================ */

/* ============================================================
   Base — 基础变量、重置、全局排版
   ============================================================ */
:root {
  --color-white: #ffffff;
  --color-ink: #1a1a1a;
  --color-gray: #6b7280;
  --color-accent: #d94f30;
  --color-cream: #f4f1ec;
  --color-border: #e5e1da;
  --color-accent-soft: #f9e8e2;
  --color-accent-dark: #b83e24;
  --color-code-bg: #f7f6f4;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Hiragino Sans GB", sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;
  --container-width: 1200px;
  --container-pad: 24px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(26, 26, 26, 0.06);
  --shadow-card-hover: 0 4px 12px rgba(26, 26, 26, 0.08);
  --header-height: 64px;
  --transition-fast: 0.2s ease;
}

/* 暗色主题变量 */
html[data-theme="dark"] {
  --color-white: #1a1a1a;
  --color-ink: #e8e6e3;
  --color-gray: #a0a0a0;
  --color-accent: #e06548;
  --color-cream: #242220;
  --color-border: #3a3835;
  --color-accent-soft: #3a2a22;
  --color-accent-dark: #e06548;
  --color-code-bg: #2a2826;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --color-white: #1a1a1a;
    --color-ink: #e8e6e3;
    --color-gray: #a0a0a0;
    --color-accent: #e06548;
    --color-cream: #242220;
    --color-border: #3a3835;
    --color-accent-soft: #3a2a22;
    --color-accent-dark: #e06548;
    --color-code-bg: #2a2826;
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.5);
  }
}

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

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-ink);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

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

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

ul,
ol {
  list-style-position: inside;
}

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

/* ============================================================
   Layout — 全站骨架容器
   ============================================================ */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* 首页主容器 */
.home-main {
  background-color: var(--color-white);
}

.inner-main {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-pad) 64px;
}

/* ============================================================
   Header — 全站统一页头
   ============================================================ */

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

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

.brand {
  flex-shrink: 0;
}

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-gray);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

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

.nav-list li {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

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

/* 下拉菜单 */
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-hover);
  padding: 8px 0;
  z-index: 50;
}

.nav-list li:hover .dropdown-menu,
.nav-list li:focus-within .dropdown-menu {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-ink);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dropdown-menu a:hover {
  background-color: var(--color-cream);
  color: var(--color-accent);
}

/* 主题切换 */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  color: var(--color-ink);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-toggle-icon {
  font-size: 16px;
  line-height: 1;
}

/* 移动端导航按钮（默认隐藏） */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  position: relative;
  width: 18px;
  height: 2px;
  background-color: var(--color-ink);
  display: block;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: var(--color-ink);
}

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

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

/* ============================================================
   Footer — 全站统一页脚
   ============================================================ */

.site-footer {
  background-color: var(--color-cream);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-pad) 24px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
}

.footer-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col a {
  font-size: 14px;
  color: var(--color-gray);
  transition: color var(--transition-fast);
}

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

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

.footer-bottom p {
  font-size: 13px;
  color: var(--color-gray);
}

/* ============================================================
   Components — 通用组件
   ============================================================ */

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-gray);
  padding: 16px 0 24px;
  flex-wrap: wrap;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  padding: 8px 0 32px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-gray);
  max-width: 720px;
  line-height: 1.7;
}

/* 区块标题 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.4;
  margin-bottom: 20px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-heading .section-title {
  margin-bottom: 0;
}

.section-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  white-space: nowrap;
}

.section-link:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  min-height: 44px;
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

.btn-secondary {
  background-color: var(--color-cream);
  color: var(--color-ink);
  border-color: var(--color-border);
}

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

/* 通用卡片 */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

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

/* 通用文本链接 */
.text-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.text-link:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

/* 相关推荐 */
.related-links {
  margin-top: 48px;
  padding: 24px;
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  padding: 6px 12px;
  background-color: var(--color-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

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

/* 通用 section-note */
.section-note {
  font-size: 14px;
  color: var(--color-gray);
  margin-top: 16px;
  line-height: 1.6;
}

.section-desc {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* ============================================================
   Pages — 首页 (index.html)
   ============================================================ */

/* ---- Hero 首屏 ---- */
.hero-section {
  background-color: var(--color-cream);
  border-bottom: 1px solid var(--color-border);
}

.hero-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-pad);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.hero-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.3;
  margin: 0;
}

.hero-description {
  font-size: 16px;
  color: var(--color-gray);
  line-height: 1.7;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.hero-figure {
  margin-top: 16px;
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.hero-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

/* 热帖榜 */
.hot-topics {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.hot-topics .section-title {
  font-size: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.hot-topic-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hot-topic-item {
  border-bottom: 1px solid var(--color-border);
}

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

.hot-topic-item a {
  display: block;
  padding: 14px 8px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.hot-topic-item a:hover {
  background-color: var(--color-cream);
}

.topic-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.5;
  display: block;
  margin-bottom: 4px;
}

.topic-excerpt {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.5;
  display: block;
}

/* ---- 版块导航 ---- */
.board-nav-section {
  padding: 48px 0;
}

.section-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

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

.board-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

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

.board-icon {
  font-size: 28px;
  line-height: 1;
  display: block;
}

.board-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}

.board-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ---- 同人精选 ---- */
.creation-featured-section {
  padding: 48px 0;
  background-color: var(--color-cream);
}

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

.creation-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

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

.creation-card img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
}

.creation-card figcaption {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.creation-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.creation-author {
  font-size: 13px;
  color: var(--color-gray);
}

/* ---- 活动预告 ---- */
.activity-preview-section {
  padding: 48px 0;
}

.activity-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 16px 0;
  border-left: 2px solid var(--color-border);
  padding-left: 24px;
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.timeline-date {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
}

.timeline-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

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

.timeline-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ---- 指南与规则入口 ---- */
.guide-rule-entry-section {
  padding: 48px 0;
  background-color: var(--color-cream);
}

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

.entry-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

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

.entry-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}

.entry-desc {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ============================================================
   Pages — 版块 (mw/board.html)
   ============================================================ */

.board-categories {
  margin-bottom: 48px;
}

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

.category-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

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

.category-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-soft);
  border-radius: var(--radius-md);
}

.category-icon img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.category-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}

.category-card p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.category-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  margin-top: auto;
  align-self: flex-start;
}

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

/* 版主招募 */
.moderator-recruit {
  margin-bottom: 48px;
  padding: 32px;
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
}

.moderator-content {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}

.moderator-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.moderator-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.moderator-text {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.moderator-text p {
  font-size: 15px;
  color: var(--color-gray);
  line-height: 1.7;
}

.moderator-text h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  margin-top: 8px;
}

.moderator-text ul {
  list-style: disc;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.moderator-text li {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

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

/* 发帖提示 */
.post-tips-section {
  margin-bottom: 48px;
}

.post-tips-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.post-tips-list li {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.post-tips-list h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.post-tips-list p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ============================================================
   Pages — 同人创作 (mw/creation.html)
   ============================================================ */

.creation-tags-section {
  margin-bottom: 48px;
}

.tag-nav-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  background-color: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

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

/* 瀑布流 */
.creation-waterfall-section {
  margin-bottom: 48px;
}

.waterfall-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: start;
}

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

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

.work-figure {
  overflow: hidden;
}

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

/* 瀑布流中不同卡片使用不同高宽比，制造错落感 */
.work-card:nth-child(2) .work-figure img,
.work-card:nth-child(5) .work-figure img,
.work-card:nth-child(8) .work-figure img {
  aspect-ratio: 1 / 1;
}

.work-card:nth-child(3) .work-figure img,
.work-card:nth-child(6) .work-figure img {
  aspect-ratio: 3 / 2;
}

.work-card:nth-child(4) .work-figure img,
.work-card:nth-child(7) .work-figure img {
  aspect-ratio: 2 / 3;
}

.work-card figcaption {
  padding: 12px 16px;
}

.work-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  padding: 0 16px;
  margin-bottom: 4px;
}

.work-author {
  font-size: 13px;
  color: var(--color-gray);
  padding: 0 16px 12px;
}

.work-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-accent);
  padding: 0 16px 16px;
  margin-top: auto;
}

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

/* 发布指南 */
.publish-guide-section {
  margin-bottom: 48px;
  padding: 32px;
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
}

.publish-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.publish-step {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 8px;
  counter-increment: step;
  position: relative;
}

.publish-step h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.publish-step h3::before {
  content: counter(step);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 14px;
  flex-shrink: 0;
}

.publish-step p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ============================================================
   Pages — 活动公告 (mw/activity.html)
   ============================================================ */

.content-section {
  margin-bottom: 48px;
}

/* 活动卡片 */
.activity-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.activity-card {
  display: grid;
  grid-template-columns: 1fr;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

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

.activity-media {
  overflow: hidden;
}

.activity-media img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  display: block;
}

.activity-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.activity-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.activity-status {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
}

.status-open {
  background-color: #e6f4ea;
  color: #1e7e34;
}

.status-soon {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

.activity-date {
  font-size: 13px;
  color: var(--color-gray);
}

.activity-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}

.activity-card-body p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* 参与流程 */
.process-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: process;
}

.process-item {
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.process-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.process-text h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.process-text p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* 往期回顾 */
.past-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.past-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

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

.past-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
}

.past-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* ============================================================
   Pages — 新手指南 (mw/guide.html)
   ============================================================ */

.guide-section {
  margin-bottom: 48px;
  padding: 32px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* 注册步骤 */
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step-card {
  padding: 24px;
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.step-card p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

/* 浏览区块 */
.browse-block {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  align-items: start;
}

.guide-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.guide-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  background-color: var(--color-cream);
}

.browse-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.browse-content h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.browse-content p {
  font-size: 15px;
  color: var(--color-gray);
  line-height: 1.7;
}

/* 发帖步骤 */
.post-steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.post-step {
  padding: 24px;
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.post-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.post-step h3::before {
  content: "";
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.post-step p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.tip-text {
  margin-top: 20px;
  padding: 16px 20px;
  background-color: var(--color-accent-soft);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-ink);
  line-height: 1.6;
}

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

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

.feedback-card {
  padding: 24px;
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feedback-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.feedback-card p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

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

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background-color var(--transition-fast);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

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

.faq-item summary:hover {
  background-color: var(--color-cream);
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

/* ============================================================
   Pages — 社区规则 (mw/rule.html)
   ============================================================ */

.rule-scope,
.rule-general,
.rule-posting,
.rule-copyright,
.rule-penalties {
  margin-bottom: 32px;
  padding: 28px 32px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.rule-scope p {
  font-size: 15px;
  color: var(--color-gray);
  line-height: 1.7;
}

.rule-list {
  list-style-position: outside;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rule-list li {
  font-size: 15px;
  color: var(--color-ink);
  line-height: 1.7;
}

.rule-list strong {
  font-weight: 700;
  color: var(--color-ink);
}

.rule-figure {
  margin: 32px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.rule-figure img {
  width: 100%;
  aspect-ratio: 21 / 6;
  object-fit: cover;
  display: block;
}

.rule-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  background-color: var(--color-cream);
}

.rule-related {
  margin-top: 48px;
  padding: 24px;
  background-color: var(--color-cream);
  border-radius: var(--radius-lg);
}

.rule-related .section-title {
  font-size: 18px;
}

.related-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links li a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-accent);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

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

/* ============================================================
   Pages — 404 (404.html)
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px var(--container-pad);
}

.error-panel {
  max-width: 560px;
  text-align: center;
  padding: 48px 32px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.error-heading {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-ink);
}

.error-desc {
  font-size: 15px;
  color: var(--color-gray);
  line-height: 1.7;
}

.error-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  min-height: 44px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.error-action:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
}

.error-help {
  font-size: 14px;
  color: var(--color-gray);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.error-help a {
  font-weight: 500;
}

/* ============================================================
   Responsive — 响应式断点
   ============================================================ */

/* 平板及以下 1024px */
@media (max-width: 1024px) {
  .hero-shell {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

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

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

  .moderator-content {
    grid-template-columns: 1fr;
  }

  .browse-block {
    grid-template-columns: 1fr;
  }
}

/* 移动端 768px 及以下 */
@media (max-width: 768px) {
  :root {
    --container-pad: 16px;
  }

  /* Header 移动端 */
  .header-shell {
    flex-wrap: wrap;
    min-height: 56px;
    padding-top: 8px;
    padding-bottom: 8px;
    gap: 8px;
  }

  .brand-tagline {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
  }

  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 8px;
    margin-top: 8px;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .dropdown-menu {
    position: static;
    display: none;
    box-shadow: none;
    border: none;
    padding-left: 16px;
    background-color: var(--color-cream);
    margin-top: 2px;
  }

  .nav-list li:hover .dropdown-menu,
  .nav-list li:focus-within .dropdown-menu {
    display: block;
  }

  .theme-toggle {
    margin-left: auto;
  }

  /* 内页 */
  .inner-main {
    padding: 24px 16px 48px;
  }

  .page-header {
    padding: 8px 0 24px;
    margin-bottom: 32px;
  }

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

  /* 首页 Hero */
  .hero-shell {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 16px;
  }

  .hero-title {
    font-size: 28px;
  }

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

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

  /* 首页版块 */
  .board-card-grid {
    grid-template-columns: 1fr;
  }

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

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

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  /* 版块页 */
  .category-grid {
    grid-template-columns: 1fr;
  }

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

  /* 同人创作 */
  .waterfall-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

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

  /* 活动 */
  .activity-card-grid {
    grid-template-columns: 1fr;
  }

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

  /* 指南 */
  .step-grid {
    grid-template-columns: 1fr;
  }

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

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

  .guide-section {
    padding: 24px 20px;
  }

  /* 规则 */
  .rule-scope,
  .rule-general,
  .rule-posting,
  .rule-copyright,
  .rule-penalties {
    padding: 24px 20px;
  }

  /* 页脚 */
  .footer-shell {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 16px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .footer-bottom {
    padding: 12px 16px;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  /* 相关链接 */
  .related-links {
    padding: 16px;
    flex-direction: column;
    align-items: flex-start;
  }

  .rule-related {
    padding: 16px;
  }
}

/* 超小屏 390px 及以下 */
@media (max-width: 390px) {
  .waterfall-grid {
    grid-template-columns: 1fr;
  }

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

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

  .brand-name {
    font-size: 20px;
  }

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

  .error-code {
    font-size: 48px;
  }

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