/* ============================================================
   牛马 AI 建站 · xingyunmeng.cn
   麻豆传媒ios官网交流论坛 整站样式
   视觉方向：法律专业风 + 社区论坛
   分组：base / layout / components / pages / responsive
   ============================================================ */

/* ============================================================
   Base
   ============================================================ */

:root {
  --color-primary: #223a5e;
  --color-accent: #a33b2e;
  --color-bg: #f7f5f2;
  --color-card: #ffffff;
  --color-text: #2b2b2b;
  --color-text-secondary: #6f6a63;
  --color-border: #e0dbd3;
  --color-primary-soft: #eef1f5;
  --color-accent-soft: #f6ece9;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --container-width: 1200px;
  --content-width: 720px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(34, 58, 94, 0.06), 0 1px 2px rgba(34, 58, 94, 0.04);
  --shadow-hover: 0 4px 12px rgba(34, 58, 94, 0.1);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

*,
*::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-sans);
  font-size: 16px;
  line-height: 1.8;
  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 var(--transition-fast);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-primary);
}

h1 {
  font-size: 30px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 19px;
}

p {
  margin-bottom: 0;
}

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

details summary {
  cursor: pointer;
}

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

/* ============================================================
   Layout · 全局骨架
   ============================================================ */

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

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

/* ---------- 页头 ---------- */

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

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  position: relative;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-list a {
  display: inline-block;
  padding: 8px 2px;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.nav-list a.is-current {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

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

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

/* ---------- 页脚 ---------- */

.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: 64px;
  font-size: 14px;
  line-height: 1.8;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-col h3 {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.footer-about .footer-brand {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-about p:last-child {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.7);
}

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

.footer-nav a,
.footer-updates a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  transition: color var(--transition-fast);
}

.footer-nav a:hover,
.footer-updates a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-notice p {
  font-size: 13px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.6);
  border-left: 2px solid rgba(255, 255, 255, 0.25);
  padding-left: 14px;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 18px 24px;
  text-align: center;
}

.footer-copyright p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 面包屑 ---------- */

.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

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

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

.breadcrumb-sep {
  color: var(--color-border);
  font-size: 12px;
}

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

/* ---------- 内页主体骨架 ---------- */

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

.page-header {
  padding: 28px 0 24px;
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: 32px;
}

.page-title {
  font-size: 30px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  max-width: 720px;
}

/* ---------- 通用 section 标题 ---------- */

.section-title {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 640px;
}

.section-note {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

/* ---------- 通用卡片与按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  background-color: transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-primary);
  color: #ffffff;
  background-color: var(--color-primary);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

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

/* ---------- 图片与媒体 ---------- */

.content-media {
  margin: 0;
}

.content-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 10px 4px 0;
  line-height: 1.6;
}

.content-media-inline {
  margin-bottom: 24px;
}

/* ============================================================
   Components · 通用组件
   ============================================================ */

/* ---------- 规则提示框 ---------- */

.rule-warning {
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-accent-soft);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ---------- 帮助卡片 ---------- */

.help-card {
  display: block;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

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

.help-card h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.help-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---------- 相关链接行 ---------- */

.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 20px 0;
  margin-top: 40px;
  border-top: 1px solid var(--color-border);
  font-size: 14px;
}

.related-links-label {
  font-weight: 600;
  color: var(--color-text);
}

.related-links-item {
  color: var(--color-primary);
}

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

/* ============================================================
   Pages · 首页 index.html
   ============================================================ */

.home-main {
  width: 100%;
}

/* ---------- 首页首屏三列 ---------- */

.hero-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.hero-text {
  margin-bottom: 32px;
}

.hero-text h1 {
  font-size: 30px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.hero-slogan {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 640px;
}

.hero-columns {
  display: grid;
  grid-template-columns: 1.1fr 1fr 0.9fr;
  gap: 24px;
  margin-bottom: 32px;
}

.hero-col {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.hero-col h2 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

/* 最新话题 */

.topic-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topic-list li {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--color-border);
}

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

.topic-list a {
  font-size: 15px;
  font-weight: 500;
  display: inline-block;
  margin-bottom: 4px;
  line-height: 1.6;
}

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

/* 趋势讨论 */

.trend-item {
  display: block;
  padding: 16px;
  margin-bottom: 12px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.trend-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.trend-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

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

/* 资料入口 */

.resource-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.resource-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.resource-links a::after {
  content: "→";
  color: var(--color-text-secondary);
  font-size: 14px;
  transition: transform var(--transition-fast);
}

.resource-links a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

.resource-links a:hover::after {
  transform: translateX(4px);
  color: var(--color-accent);
}

/* hero 主视觉 */

.hero-figure {
  margin: 0;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* ---------- 首页版块总览 ---------- */

.board-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--color-border);
}

.board-overview .section-intro {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  max-width: 640px;
}

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

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

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

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

.board-card h3 {
  padding: 16px 20px 6px;
  font-size: 18px;
}

.board-card p {
  padding: 0 20px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  flex: 1 0 auto;
}

.board-card .tag {
  display: inline-block;
  margin: 12px 20px 4px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
  border-radius: 20px;
}

.board-card a {
  display: inline-block;
  margin: 8px 20px 20px;
  font-size: 14px;
  font-weight: 500;
}

.board-card a::after {
  content: " →";
}

/* ---------- 首页讨论主题时间线 ---------- */

.topic-timeline {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--color-border);
}

.topic-timeline h2 {
  margin-bottom: 32px;
}

.timeline-list {
  position: relative;
  padding-left: 0;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 40px 32px;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 3px solid var(--color-card);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item:nth-child(odd)::before {
  right: -6px;
}

.timeline-item:nth-child(even)::before {
  left: -6px;
}

.timeline-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ---------- 首页新手指南与常见误区 ---------- */

.guide-misunderstand {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.guide-column h2,
.misunderstand-column h2 {
  font-size: 22px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
}

.guide-steps {
  counter-reset: guide-step;
}

.guide-steps li {
  counter-increment: guide-step;
  position: relative;
  padding: 0 0 16px 44px;
  font-size: 15px;
  line-height: 1.7;
}

.guide-steps li::before {
  content: counter(guide-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: #ffffff;
  font-family: var(--font-serif);
  font-size: 15px;
  border-radius: 50%;
}

.guide-steps a {
  font-weight: 500;
}

.misunderstand-list li {
  padding: 14px 16px;
  margin-bottom: 12px;
  background-color: var(--color-card);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 14px;
  line-height: 1.7;
}

.misunderstand-list a {
  font-weight: 500;
}

/* ---------- 首页参与方式 ---------- */

.participation {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.participation h2 {
  margin-bottom: 12px;
}

.participation > p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 28px;
  line-height: 1.8;
}

.participation-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================================
   Pages · 交流分区 mdcmiosgw/bbs.html
   ============================================================ */

/* 筛选按钮 */

.board-filter {
  margin-bottom: 40px;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.filter-btn {
  min-height: 44px;
  padding: 8px 22px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background-color: var(--color-card);
  color: var(--color-text);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-btn.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

/* 版块列表 */

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

.board-item {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.board-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}

.board-media img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.board-content {
  display: flex;
  flex-direction: column;
}

.board-name {
  font-size: 20px;
  margin-bottom: 8px;
}

.board-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
  flex: 1 0 auto;
}

.board-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.board-tags li {
  font-size: 12px;
  padding: 3px 12px;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: 20px;
}

.board-entry a {
  font-size: 14px;
  font-weight: 500;
}

.board-entry a::after {
  content: " →";
}

/* 相关入口 */

.entry-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.entry-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.entry-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.entry-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.entry-link a {
  font-size: 14px;
  font-weight: 500;
}

.entry-link a::after {
  content: " →";
}

/* ============================================================
   Pages · 热门话题 mdcmiosgw/hot.html
   ============================================================ */

.page-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
}

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

/* 编号话题列表 */

.hot-list-section {
  margin-bottom: 32px;
}

.hot-list {
  counter-reset: hot-item;
}

.hot-item {
  counter-increment: hot-item;
  margin-bottom: 16px;
}

.hot-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

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

.hot-number {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  padding-top: 2px;
}

.hot-item-title {
  font-size: 18px;
  margin-bottom: 6px;
}

.hot-item-title a {
  color: var(--color-primary);
}

.hot-item-title a:hover {
  color: var(--color-accent);
}

.hot-item-summary {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 10px;
}

.hot-item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.hot-tag {
  font-size: 12px;
  padding: 3px 12px;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: 20px;
}

.hot-item-meta a {
  font-size: 13px;
  font-weight: 500;
}

/* 标签侧栏 */

.sidebar-column {
  min-width: 0;
}

.tag-sidebar-section {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.sidebar-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.tag-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tag-list a {
  display: block;
  padding: 10px 14px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.tag-list a:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

.tag-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  line-height: 1.6;
}

/* 相关阅读 */

.related-read {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

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

.related-card {
  display: flex;
  gap: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

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

.related-media {
  flex-shrink: 0;
  width: 120px;
}

.related-media img {
  width: 120px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.related-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
  line-height: 1.5;
}

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

/* ============================================================
   Pages · 新手指南 mdcmiosgw/guide.html
   ============================================================ */

/* 材料清单 */

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

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

.material-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.material-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.material-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 步骤时间线 */

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

.steps-timeline {
  position: relative;
  counter-reset: step-counter;
}

.step-item {
  counter-increment: step-counter;
  position: relative;
  padding: 0 0 28px 56px;
  border-left: 2px solid var(--color-border);
  margin-left: 20px;
}

.step-item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.step-number {
  position: absolute;
  left: -20px;
  top: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: #ffffff;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  border-radius: 50%;
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
}

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

.step-meta h3 {
  font-size: 18px;
}

.step-item > p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.step-result {
  font-size: 13px;
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  display: inline-block;
}

.steps-figure {
  margin-top: 32px;
}

.steps-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.steps-figure figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 10px 4px 0;
  line-height: 1.6;
}

/* 时间说明 */

.time-note-section {
  margin-bottom: 48px;
}

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

.time-list li {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 14px;
  line-height: 1.7;
  box-shadow: var(--shadow-card);
}

/* 结果确认 */

.result-check-section {
  margin-bottom: 48px;
}

.result-check-content {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-check-content p {
  font-size: 15px;
  line-height: 1.8;
}

.result-check-content strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* FAQ 入口 */

.faq-link-section {
  margin-bottom: 24px;
}

.faq-link-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.faq-link-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
}

.faq-link-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.faq-link-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

.faq-link-more {
  font-size: 14px;
}

.faq-link-more a {
  font-weight: 500;
}

/* ============================================================
   Pages · 社区规则 mdcmiosgw/rules.html
   ============================================================ */

.rule-summary {
  margin-bottom: 48px;
}

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

.summary-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border-top: 3px solid var(--color-primary);
}

.summary-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.summary-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 详细条款 */

.rule-detail {
  margin-bottom: 48px;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.rule-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.rule-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 相关帮助 */

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

/* ============================================================
   Pages · 常见问题 mdcmiosgw/faq.html
   ============================================================ */

/* 折叠问答 */

.faq-list {
  margin-bottom: 48px;
}

.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-primary);
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

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

.faq-item p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* 术语索引与常见误区 */

.term-misconception {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

.term-index-wrap h2,
.misconception-wrap h3 {
  font-size: 22px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
}

.term-intro {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.term-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.term-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
}

.term-item dt {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 14px;
}

.term-item dd {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

.misconception-list li {
  background-color: var(--color-card);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.7;
  box-shadow: var(--shadow-card);
}

.misconception-list strong {
  color: var(--color-accent);
  font-weight: 600;
}

.misconception-list span {
  color: var(--color-text-secondary);
}

/* 相关入口侧栏 */

.related-entry {
  margin-bottom: 24px;
}

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

.related-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
}

.related-card h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.related-card h3 a {
  color: var(--color-primary);
}

.related-card h3 a:hover {
  color: var(--color-accent);
}

.related-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   Pages · 意见反馈 mdcmiosgw/feedback.html
   ============================================================ */

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

/* 反馈范围 */

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

.scope-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  border-top: 3px solid var(--color-primary);
}

.scope-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.scope-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 反馈流程 */

.flow-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  margin-bottom: 24px;
}

.flow-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.flow-figure figcaption {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 10px 4px 0;
  line-height: 1.6;
}

.flow-steps {
  counter-reset: flow-step;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.flow-steps li {
  counter-increment: flow-step;
  position: relative;
  padding-left: 48px;
}

.flow-steps li::before {
  content: counter(flow-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: #ffffff;
  font-family: var(--font-serif);
  font-size: 15px;
  border-radius: 50%;
}

.flow-steps h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.flow-steps p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.flow-note {
  background-color: var(--color-primary-soft);
  border-left: 4px solid var(--color-primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.flow-note p {
  font-size: 14px;
  line-height: 1.7;
}

.flow-note strong {
  color: var(--color-primary);
  font-weight: 600;
}

.flow-note a {
  font-weight: 500;
}

/* 自查入口 */

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

/* ============================================================
   Pages · 404.html
   ============================================================ */

.site-error {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-main {
  width: 100%;
}

.error-content {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 24px;
  text-align: center;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 12px;
}

.error-content h1 {
  font-size: 26px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  line-height: 1.8;
}

.error-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.error-actions a:not(.btn-primary) {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  background-color: var(--color-card);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.error-actions a:not(.btn-primary):hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

.error-help {
  font-size: 14px;
  color: var(--color-text-secondary);
}

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

/* ============================================================
   Responsive · 响应式
   ============================================================ */

@media (max-width: 1024px) {
  .board-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

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

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

  .hero-col.resource-entry {
    grid-column: 1 / -1;
  }

  .resource-links {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
  }

  .resource-links li {
    flex: 1 1 200px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-layout {
    grid-template-columns: 1fr 280px;
    gap: 24px;
  }
}

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

  .brand-name {
    font-size: 18px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(34, 58, 94, 0.08);
  }

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

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

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

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

  .nav-list a {
    display: block;
    padding: 14px 8px;
    font-size: 15px;
    border-bottom: none;
  }

  .nav-list a.is-current {
    border-bottom: none;
    color: var(--color-accent);
  }

  .breadcrumb {
    padding: 16px 16px 0;
  }

  .inner-main {
    padding: 0 16px 16px;
  }

  .page-header {
    padding: 20px 0 16px;
    margin-bottom: 24px;
  }

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

  .hero-layout {
    padding: 32px 16px 16px;
  }

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

  .hero-columns {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .hero-col.resource-entry {
    grid-column: auto;
  }

  .resource-links {
    flex-direction: column;
  }

  .resource-links li {
    flex: none;
  }

  .board-overview,
  .topic-timeline,
  .guide-misunderstand,
  .participation {
    padding: 32px 16px;
  }

  .board-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .timeline-list::before {
    left: 12px;
    transform: none;
  }

  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding: 0 0 24px 36px;
    text-align: left !important;
  }

  .timeline-item::before {
    left: 6px !important;
    right: auto !important;
  }

  .guide-misunderstand {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .participation-links {
    flex-direction: column;
    align-items: stretch;
  }

  .board-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 16px;
  }

  .board-media img {
    height: 180px;
  }

  .entry-cards,
  .related-grid,
  .faq-link-list,
  .related-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .sidebar-column {
    order: 2;
  }

  .main-column {
    order: 1;
  }

  .materials-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .time-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .steps-timeline {
    margin-left: 0;
  }

  .step-item {
    padding-left: 48px;
    margin-left: 10px;
  }

  .step-number {
    left: -20px;
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .term-misconception {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .term-item {
    grid-template-columns: 90px 1fr;
  }

  .scope-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .summary-grid,
  .help-grid,
  .self-help-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .flow-figure {
    max-width: 320px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 36px 16px 24px;
  }

  .footer-copyright {
    padding: 16px;
  }

  .error-code {
    font-size: 56px;
  }

  .error-content {
    padding: 32px 16px;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 17px;
  }

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

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

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

  .hot-card {
    grid-template-columns: 40px 1fr;
    gap: 12px;
    padding: 16px;
  }

  .hot-number {
    font-size: 24px;
  }

  .related-card {
    flex-direction: column;
  }

  .related-media,
  .related-media img {
    width: 100%;
    height: 160px;
  }

  .term-item {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .flow-steps li {
    padding-left: 40px;
  }

  .flow-steps li::before {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }
}