/* =========================================================
   jm漫画网页版 - 全站样式表
   版本: 1.0
   说明: 覆盖全站所有页面真实DOM结构
   ========================================================= */

/* =========================================================
   Base - 基础变量、重置与全局设置
   ========================================================= */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f5;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-primary: #ff6b6b;
  --color-secondary: #4ecdc4;
  --color-border: #e8e8e8;
  --color-white: #ffffff;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-xs: 12px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-xxl: 24px;
  --font-size-h1: 32px;
  --font-size-h2: 22px;
  --font-size-h3: 18px;
  --line-height-base: 1.6;
  --container-width: 1200px;
  --container-padding: 20px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
  --transition-base: 0.2s ease;
  --transition-smooth: 0.3s ease;
  --header-height: 64px;
  --breakpoint-mobile: 768px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  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-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: #e05555;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

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

/* =========================================================
   Layout - 全局布局骨架
   ========================================================= */

/* 站点骨架 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

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

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

.site-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  margin-top: 60px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px var(--container-padding) 30px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

/* 页脚品牌 */
.footer-brand-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 页脚链接 */
.footer-links-title,
.footer-legal-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.footer-nav-list a {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

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

.footer-legal p {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 4px;
}

/* =========================================================
   Components - 通用组件
   ========================================================= */

/* 品牌 Logo */
.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0;
}

.brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* 主导航 */
.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-list li a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-base);
  min-height: 40px;
  line-height: 24px;
}

.nav-list li a:hover {
  color: var(--color-primary);
  background-color: rgba(255, 107, 107, 0.08);
}

.nav-list li a.is-current {
  color: var(--color-primary);
  background-color: rgba(255, 107, 107, 0.1);
  font-weight: 600;
}

/* 汉堡菜单按钮（移动端显示） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-smooth);
  border-radius: 1px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 20px;
  padding: 12px 0;
}

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

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

.breadcrumb-sep {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

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

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

.page-title {
  font-size: var(--font-size-h1);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.3;
}

.page-description {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.6;
  max-width: 720px;
}

/* 区块标题 */
.section-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.section-desc {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin-bottom: 20px;
  line-height: 1.6;
}

/* =========================================================
   Pages - 首页
   ========================================================= */

.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* 首屏摘要区 */
.hero-summary {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0 40px;
}

.hero-text h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 24px;
}

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

.cta-link {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  min-height: 44px;
  line-height: 20px;
}

.cta-link:hover {
  background-color: #e05555;
  color: var(--color-white);
}

.cta-link.cta-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.cta-link.cta-secondary:hover {
  background-color: rgba(255, 107, 107, 0.08);
}

.hero-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* 题材分类导航条 */
.category-strip {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.category-tags li a {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: all var(--transition-base);
  min-height: 36px;
  line-height: 20px;
}

.category-tags li a:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* 最近更新 */
.recent-updates {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.update-group {
  margin-bottom: 24px;
}

.update-date {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(255, 107, 107, 0.2);
}

.update-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.update-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

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

.update-item img {
  width: 72px;
  height: 96px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.update-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.update-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

.update-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.update-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-secondary);
}

.update-link:hover {
  color: #3dbdb5;
}

/* 人气榜单预览 */
.ranking-preview {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.ranking-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.ranking-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

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

.ranking-item img {
  width: 72px;
  height: 96px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.ranking-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.ranking-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

.ranking-reason {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

.ranking-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-secondary);
}

.ranking-link:hover {
  color: #3dbdb5;
}

/* 阅读指南入口 */
.guide-entry {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

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

.guide-card {
  padding: 24px;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

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

.guide-card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.guide-card-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 16px;
}

.guide-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
}

.guide-link:hover {
  color: #e05555;
}

/* 版权与反馈 */
.copyright-feedback {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.copyright-feedback p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
  max-width: 800px;
}

/* =========================================================
   Pages - 内页通用
   ========================================================= */

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

/* =========================================================
   Pages - 题材分类页
   ========================================================= */

.layout-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

/* 侧边分类索引 */
.category-index {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.category-index-list li {
  margin-bottom: 4px;
}

.category-index-list a {
  display: block;
  padding: 10px 12px;
  color: var(--color-text);
  font-size: var(--font-size-base);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  line-height: 1.4;
}

.category-index-list a:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

/* 分类详情 */
.category-detail {
  min-width: 0;
}

.category-block {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.category-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.category-block h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.category-block > p {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 20px;
}

.work-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.work-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.work-cover {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.work-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  padding: 12px 12px 4px;
  line-height: 1.3;
}

.work-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  padding: 0 12px 12px;
  line-height: 1.5;
}

/* 分类相关链接 */
.category-related {
  margin-top: 40px;
  padding: 24px;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  text-align: center;
}

.category-related h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 8px;
}

.category-related p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
}

.category-related a {
  display: inline-block;
  margin: 8px 8px 0;
  color: var(--color-primary);
  font-weight: 500;
}

/* =========================================================
   Pages - 阅读指南页
   ========================================================= */

.guide-section {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.guide-section:last-of-type {
  border-bottom: none;
}

.section-lead {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 24px;
}

.guide-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.guide-step-item {
  padding: 20px;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.guide-step-item .step-number {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  font-weight: 700;
  font-size: var(--font-size-sm);
  margin-bottom: 12px;
}

.guide-step-item .step-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.guide-step-item .step-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
}

.guide-step-item .step-text a {
  color: var(--color-secondary);
}

.guide-media {
  margin-top: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.guide-media img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.guide-media figcaption {
  padding: 12px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  text-align: center;
}

/* 相关链接 */
.related-links {
  margin-top: 32px;
  padding: 20px;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
}

.related-links p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
}

.related-links a {
  display: inline-block;
  margin: 8px 8px 0;
  color: var(--color-primary);
  font-weight: 500;
}

/* =========================================================
   Pages - 人气榜单页
   ========================================================= */

.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

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

/* 侧边栏 */
.sidebar {
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

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

.sidebar-card h2 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.sidebar-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

/* 榜单区块 */
.ranking-section {
  margin-bottom: 40px;
}

.ranking-section h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-intro {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 24px;
}

.ranking-list li.ranking-item {
  margin-bottom: 12px;
}

.ranking-card {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

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

.ranking-card img {
  width: 80px;
  height: 110px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.ranking-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  flex: 1;
}

.ranking-info h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

.ranking-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.ranking-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

/* 上榜理由 */
.reason-section {
  margin-bottom: 40px;
}

.reason-section h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.reason-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.reason-item {
  padding: 16px;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.reason-item h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.reason-item p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

/* 相关链接（榜单页） */
.related-links p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.related-links a {
  display: inline-block;
  margin: 8px 8px 0;
  color: var(--color-primary);
  font-weight: 500;
}

/* =========================================================
   Pages - 追更技巧页
   ========================================================= */

/* 侧边栏（技巧页） */
.sidebar-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}

.sidebar-left .side-module {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}

.side-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.side-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

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

.side-item {
  display: block;
}

/* 文章正文 */
.article-content {
  min-width: 0;
}

.article-content h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text);
  margin: 32px 0 12px;
}

.article-content p {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.article-content a {
  color: var(--color-secondary);
  font-weight: 500;
}

.article-content a:hover {
  color: #3dbdb5;
}

.article-figure {
  margin: 20px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.article-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.article-figure figcaption {
  padding: 12px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  text-align: center;
}

/* 相关推荐模块 */
.related-module {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.related-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.related-card {
  display: block;
  padding: 20px;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

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

.related-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.related-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

/* =========================================================
   Pages - 404页
   ========================================================= */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 40px 20px;
}

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

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

.error-panel h1 {
  font-size: var(--font-size-xxl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.error-desc {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 24px;
}

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

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  transition: all var(--transition-base);
  min-height: 44px;
  line-height: 20px;
}

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

.btn-primary:hover {
  background-color: #e05555;
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: rgba(255, 107, 107, 0.08);
}

/* =========================================================
   Responsive - 响应式
   ========================================================= */

@media (max-width: 1024px) {
  .layout-shell {
    grid-template-columns: 200px 1fr;
    gap: 24px;
  }

  .page-layout {
    grid-template-columns: 1fr 260px;
    gap: 24px;
  }

  .sidebar-left {
    grid-template-columns: 220px 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
    --container-padding: 16px;
    --font-size-h1: 28px;
    --font-size-h2: 20px;
  }

  /* 移动端导航 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 0;
    margin: 0;
  }

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

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

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

  .nav-list li a {
    display: block;
    padding: 14px 12px;
    border-radius: var(--radius-sm);
    border-bottom: 1px solid var(--color-border);
  }

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

  /* 首页 */
  .hero-summary {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0 24px;
  }

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

  .hero-figure img {
    height: 220px;
  }

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

  /* 内页布局 */
  .layout-shell,
  .page-layout,
  .sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .category-index,
  .sidebar,
  .sidebar-left .side-module {
    position: static;
  }

  .category-index {
    overflow-x: auto;
    padding: 12px;
  }

  .category-index-list {
    display: flex;
    gap: 8px;
    white-space: nowrap;
  }

  .category-index-list li {
    margin-bottom: 0;
  }

  .category-index-list a {
    padding: 8px 16px;
    background-color: var(--color-white);
    border-radius: 20px;
    border: 1px solid var(--color-border);
  }

  /* 榜单页侧栏 */
  .sidebar-card {
    padding: 16px;
  }

  /* 技巧页侧栏 */
  .sidebar-left .side-module {
    margin-bottom: 12px;
  }

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

  .footer-brand,
  .footer-links,
  .footer-legal {
    text-align: left;
  }

  /* 更新列表 */
  .update-list,
  .ranking-list {
    grid-template-columns: 1fr;
  }

  /* 工作列表 */
  .work-list {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
  }

  .work-cover {
    height: 130px;
  }

  /* 指南步骤 */
  .guide-steps {
    grid-template-columns: 1fr;
  }

  /* 理由列表 */
  .reason-list {
    grid-template-columns: 1fr;
  }

  /* 相关网格 */
  .related-grid {
    grid-template-columns: 1fr;
  }

  /* 图片高度调整 */
  .guide-media img {
    height: 200px;
  }

  .article-figure img {
    height: 200px;
  }

  /* 面包屑 */
  .breadcrumb {
    margin-bottom: 16px;
    padding: 8px 0;
    font-size: var(--font-size-xs);
    overflow-x: auto;
    white-space: nowrap;
  }

  /* 页面标题 */
  .page-header {
    margin-bottom: 24px;
  }

  /* 首屏CTA */
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .cta-link {
    text-align: center;
    width: 100%;
  }

  /* 榜单卡片 */
  .ranking-card {
    flex-direction: row;
    align-items: flex-start;
  }

  .ranking-card img {
    width: 64px;
    height: 88px;
  }

  /* 404 */
  .error-code {
    font-size: 56px;
  }

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

  .btn-primary,
  .btn-secondary {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 390px) {
  :root {
    --container-padding: 12px;
  }

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

  .hero-lead {
    font-size: var(--font-size-base);
  }

  .brand-name {
    font-size: var(--font-size-lg);
  }

  .brand-tagline {
    font-size: 11px;
  }

  .update-item img {
    width: 60px;
    height: 80px;
  }

  .ranking-item img {
    width: 60px;
    height: 80px;
  }

  .work-cover {
    height: 110px;
  }

  .category-tags li a {
    padding: 6px 14px;
    font-size: var(--font-size-xs);
  }

  .guide-card {
    padding: 16px;
  }
}

/* =========================================================
   Motion - 动效增强（不影响初始可见性）
   ========================================================= */

@media (prefers-reduced-motion: no-preference) {
  .update-item,
  .ranking-item,
  .work-card,
  .guide-card,
  .related-card {
    transition: box-shadow var(--transition-base), transform var(--transition-base);
  }

  .update-item:hover,
  .ranking-item:hover,
  .work-card:hover,
  .guide-card:hover,
  .related-card:hover {
    transform: translateY(-2px);
  }
}