/* =========================================================
   base — 变量、reset、全局基础样式
   ========================================================= */
:root {
  --color-navy: #1a2a3a;
  --color-orange: #ff6b35;
  --color-orange-light: #ff8c5a;
  --color-bg: #f5f5f5;
  --color-white: #ffffff;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-lighter: #999999;
  --color-border: #e5e5e5;
  --color-border-dark: #d0d0d0;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --font-serif: "Songti SC", "SimSun", serif;
  --container-width: 1200px;
  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-base: 0.2s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

a {
  color: var(--color-navy);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-navy);
}

p {
  margin-bottom: 1em;
}

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

/* =========================================================
   layout — 全站骨架：页头、页脚、主容器、面包屑
   ========================================================= */
.site-header {
  background-color: var(--color-navy);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(26, 42, 58, 0.15);
}

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

.brand-logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: 1px;
  flex-shrink: 0;
}

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

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

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

.nav-list li a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-list li a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-list li a.is-current {
  color: var(--color-orange);
  background-color: rgba(255, 107, 53, 0.15);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

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

.site-main {
  min-height: 60vh;
}

.site-main.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-lighter);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

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

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

.page-header {
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}

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

/* =========================================================
   components — 通用组件：标题、卡片、列表、按钮、FAQ
   ========================================================= */
.section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

.more-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-orange);
  padding: 8px 20px;
  border: 1px solid var(--color-orange);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.more-link:hover {
  background-color: var(--color-orange);
  color: var(--color-white);
}

/* 页脚 */
.site-footer {
  background-color: var(--color-navy);
  color: rgba(255, 255, 255, 0.8);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-brand {
  margin-bottom: 32px;
}

.footer-site-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding: 32px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-list li {
  margin-bottom: 10px;
}

.footer-list li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-list li a:hover {
  color: var(--color-orange);
}

.footer-copyright p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0;
  text-align: center;
}

/* =========================================================
   pages — 首页
   ========================================================= */
.site-main.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* 首屏 hero */
.hero-section {
  padding: 48px 0 40px;
}

.hero-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}

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

.hero-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.hero-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.hero-card:hover {
  box-shadow: 0 4px 16px rgba(26, 42, 58, 0.1);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.hero-card .card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-orange);
}

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

/* 题材分类导航带 */
.category-nav-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.category-tags li a {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-navy);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: border-color var(--transition-base), color var(--transition-base), background-color var(--transition-base);
}

.category-tags li a:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
  background-color: rgba(255, 107, 53, 0.05);
}

/* 最近更新 */
.updates-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.update-group {
  margin-bottom: 32px;
}

.update-date {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-orange);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.update-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.update-item {
  display: flex;
  gap: 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: box-shadow var(--transition-base);
}

.update-item:hover {
  box-shadow: 0 2px 12px rgba(26, 42, 58, 0.08);
}

.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;
  justify-content: center;
  min-width: 0;
}

.update-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.update-status {
  font-size: 13px;
  color: var(--color-orange);
  margin-bottom: 4px;
}

.update-info time {
  font-size: 13px;
  color: var(--color-text-lighter);
}

/* 人气榜单预览 */
.ranking-preview-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.ranking-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.ranking-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.rank-number {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-orange);
  width: 40px;
  text-align: center;
  flex-shrink: 0;
}

.ranking-item img {
  width: 56px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.rank-info {
  min-width: 0;
}

.rank-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rank-reason {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.5;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 指南与技巧入口 */
.guide-entry-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}

.entry-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.entry-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.entry-card:hover {
  box-shadow: 0 4px 16px rgba(26, 42, 58, 0.1);
  transform: translateY(-2px);
}

.entry-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.entry-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

.entry-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-orange);
}

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

/* 站点反馈 */
.site-feedback {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  max-width: 720px;
}

.site-feedback p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 0;
}

/* =========================================================
   pages — 题材分类页
   ========================================================= */
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: start;
}

.category-aside {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.aside-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

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

.category-tree li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.category-tree li a:hover {
  background-color: rgba(255, 107, 53, 0.08);
  color: var(--color-orange);
}

.category-tree .count {
  font-size: 12px;
  color: var(--color-text-lighter);
  background-color: var(--color-bg);
  padding: 2px 8px;
  border-radius: 10px;
}

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

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

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

.genre-item {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 24px;
  align-items: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.genre-text h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.genre-text p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.genre-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-orange);
}

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

.genre-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.genre-figure figcaption {
  font-size: 12px;
  color: var(--color-text-lighter);
  text-align: center;
  padding: 8px 0;
  background-color: var(--color-bg);
}

.category-guide {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.category-guide p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 1em;
}

/* =========================================================
   pages — 阅读指南页
   ========================================================= */
.guide-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
}

.guide-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.guide-section p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 1em;
}

.guide-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 20px;
}

.guide-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.guide-figure figcaption {
  font-size: 13px;
  color: var(--color-text-lighter);
  text-align: center;
  padding: 10px;
  background-color: var(--color-bg);
}

.guide-related {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.guide-related p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.related-links li {
  margin-bottom: 10px;
}

.related-links li a {
  font-size: 15px;
  color: var(--color-orange);
  font-weight: 500;
}

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

/* =========================================================
   pages — 最近更新页
   ========================================================= */
.update-section {
  margin-bottom: 40px;
}

.update-section .section-title {
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 24px;
}

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

.update-item {
  display: flex;
  gap: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  align-items: center;
  transition: box-shadow var(--transition-base);
}

.update-item:hover {
  box-shadow: 0 2px 12px rgba(26, 42, 58, 0.08);
}

.update-cover {
  flex-shrink: 0;
}

.update-cover img {
  width: 64px;
  height: 88px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

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

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

.update-title a {
  color: var(--color-navy);
}

.update-title a:hover {
  color: var(--color-orange);
}

.update-chapter {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.update-info time {
  font-size: 13px;
  color: var(--color-text-lighter);
}

.update-note {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.update-note p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 1em;
}

.update-note p a {
  color: var(--color-orange);
  font-weight: 500;
}

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

/* =========================================================
   pages — 人气榜单页
   ========================================================= */
.ranking-section {
  margin-bottom: 48px;
}

.ranking-section .ranking-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.ranking-section .ranking-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px;
}

.ranking-card {
  display: flex;
  align-items: center;
  gap: 20px;
}

.ranking-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-orange);
  width: 48px;
  text-align: center;
  flex-shrink: 0;
}

.ranking-cover {
  flex-shrink: 0;
}

.ranking-cover img {
  width: 56px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

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

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

.ranking-reason {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

.ranking-reasons-section {
  margin-bottom: 48px;
}

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

.reason-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.reason-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.reason-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

.ranking-note {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.ranking-note p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 1em;
}

/* =========================================================
   pages — 追更技巧页
   ========================================================= */
.tips-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
}

.tips-section .section-title {
  font-size: 22px;
  margin-bottom: 20px;
}

.tips-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 1em;
}

.tips-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 32px;
}

.tips-image {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.tips-figure figcaption {
  font-size: 13px;
  color: var(--color-text-lighter);
  text-align: center;
  padding: 10px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-top: none;
}

.tips-faq {
  display: grid;
  gap: 12px;
}

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

.tips-faq-item summary {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-navy);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 24px;
}

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

.tips-faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--color-orange);
  font-weight: 700;
}

.tips-faq-item[open] summary::after {
  content: "−";
}

.tips-faq-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.tips-related {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.related-link-list li {
  margin-bottom: 10px;
}

.related-link-list li a {
  font-size: 15px;
  color: var(--color-orange);
  font-weight: 500;
}

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

/* =========================================================
   pages — 404 页
   ========================================================= */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-panel {
  text-align: center;
  max-width: 480px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
}

.error-code {
  font-size: 72px;
  font-weight: 800;
  color: var(--color-orange);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 24px;
}

.error-back {
  display: inline-block;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  background-color: var(--color-orange);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base);
}

.error-back:hover {
  background-color: var(--color-orange-light);
  color: var(--color-white);
}

/* =========================================================
   responsive — 响应式断点
   ========================================================= */
@media (max-width: 1024px) {
  .hero-media img {
    height: 260px;
  }

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

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

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

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

  .layout-shell.sidebar-left {
    grid-template-columns: 240px 1fr;
    gap: 24px;
  }
}

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

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-navy);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
    box-shadow: 0 8px 16px rgba(26, 42, 58, 0.2);
  }

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

  .nav-list li a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .site-main.inner-main {
    padding: 24px 16px 48px;
  }

  .site-main.home-main {
    padding: 0 16px 48px;
  }

  .hero-section {
    padding: 32px 0 24px;
  }

  .hero-media img {
    height: 200px;
  }

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

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

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

  .category-aside {
    position: static;
    order: -1;
  }

  .genre-item {
    grid-template-columns: 1fr;
  }

  .genre-figure img {
    height: 180px;
  }

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

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

  .footer-inner {
    padding: 32px 16px 24px;
  }

  .footer-links-group {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px 0;
  }
}

@media (max-width: 480px) {
  .hero-media img {
    height: 160px;
  }

  .update-item {
    flex-direction: row;
    align-items: flex-start;
  }

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

  .ranking-card {
    gap: 12px;
  }

  .ranking-number {
    font-size: 22px;
    width: 36px;
  }

  .ranking-cover img {
    width: 48px;
    height: 64px;
  }

  .guide-section,
  .tips-section,
  .guide-related,
  .tips-related,
  .update-note,
  .ranking-note,
  .category-guide {
    padding: 24px 20px;
  }

  .guide-figure img,
  .tips-image {
    height: 180px;
  }

  .error-panel {
    padding: 32px 24px;
  }

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