/* ==========================================================================
   base — 基础变量、重置、字体、通用元素
   ========================================================================== */

:root {
  --color-bg: #F5F7FA;
  --color-surface: #FFFFFF;
  --color-text: #2C3E50;
  --color-primary: #3498DB;
  --color-accent: #E74C3C;
  --color-text-light: #5D6D7E;
  --color-border: #E1E8ED;
  --color-dark: #2C3E50;
  --color-muted: #8395A7;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(44, 62, 80, 0.08);
  --shadow-md: 0 2px 8px rgba(44, 62, 80, 0.12);
  --transition: 0.25s ease;
}

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

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

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

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

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

a:hover {
  color: #217Dbb;
}

ul,
ol {
  list-style: none;
}

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

p {
  margin-bottom: 1rem;
}

/* ==========================================================================
   layout — 全站布局骨架：页头、页脚、主容器
   ========================================================================== */

.site-header {
  background-color: var(--color-surface);
  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 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: 0;
}

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

.site-nav {
  margin-left: auto;
}

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

.nav-list a {
  display: block;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.nav-list a:hover {
  background-color: rgba(52, 152, 219, 0.1);
  color: var(--color-primary);
}

.nav-list a.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background-color: rgba(52, 152, 219, 0.08);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.site-main {
  flex: 1;
}

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

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

.footer-brand {
  max-width: 320px;
}

.footer-sitename {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

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

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 12px;
}

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

.footer-col a {
  font-size: 14px;
  color: var(--color-text-light);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
  text-align: center;
}

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

/* ==========================================================================
   components — 通用组件：面包屑、按钮、卡片、列表、FAQ
   ========================================================================== */

.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

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

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

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

.btn-primary:hover {
  background-color: #217Dbb;
  color: var(--color-surface);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: rgba(52, 152, 219, 0.06);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.7;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 24px;
}

.section-link {
  margin-top: 24px;
}

.section-link a {
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.section-link a::after {
  content: "→";
  transition: transform var(--transition);
}

.section-link a:hover::after {
  transform: translateX(4px);
}

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

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition);
}

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

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

/* ==========================================================================
   components — 首页专属模块
   ========================================================================== */

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

.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px 48px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-copy h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--color-dark);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-figure {
  margin: 0;
}

.hero-figure img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.hero-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  text-align: center;
  padding-top: 8px;
}

/* 题材分类导航 */
.category-nav-section,
.recent-updates-section,
.ranking-preview-section,
.guide-entry-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
}

.category-nav-section h2,
.recent-updates-section h2,
.ranking-preview-section h2,
.guide-entry-section h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

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

.category-tags li {
  margin: 0;
}

.category-tags a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 20px;
  border-radius: 999px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: border-color var(--transition), color var(--transition), background-color var(--transition);
}

.category-tags a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: rgba(52, 152, 219, 0.04);
}

/* 最近更新 */
.recent-updates-section {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.recent-updates-section .section-intro {
  margin-bottom: 20px;
}

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

.update-date {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}

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

.update-item {
  margin: 0;
}

.update-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  transition: background-color var(--transition);
}

.update-link:hover {
  background-color: rgba(52, 152, 219, 0.06);
}

.update-cover {
  width: 56px;
  height: 72px;
  border-radius: var(--radius-sm);
  background-color: var(--color-border);
  flex-shrink: 0;
  overflow: hidden;
}

.update-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.update-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.update-chapter {
  font-size: 13px;
  color: var(--color-text-light);
}

.update-status {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background-color: rgba(52, 152, 219, 0.1);
  color: var(--color-primary);
  white-space: nowrap;
  flex-shrink: 0;
}

/* 人气榜单预览 */
.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ranking-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition), transform var(--transition);
}

.ranking-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.ranking-number {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  min-width: 32px;
  text-align: center;
  padding-top: 4px;
}

.ranking-content {
  flex: 1;
}

.ranking-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.ranking-content h3 a {
  color: var(--color-dark);
}

.ranking-content h3 a:hover {
  color: var(--color-primary);
}

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

/* 阅读指南入口 */
.guide-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

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

.guide-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.guide-card h3 a {
  color: var(--color-dark);
}

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

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

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

/* ==========================================================================
   pages — 内页公共布局
   ========================================================================== */

.inner-main {
  padding-bottom: 64px;
}

/* 分类页 */
.category-section,
.category-desc-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.category-section h2,
.category-desc-section h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 24px;
}

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

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

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

.category-figure {
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-border);
}

.category-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.category-card:hover .category-figure img {
  transform: scale(1.03);
}

.category-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-dark);
  padding: 16px 20px 4px;
}

.category-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  padding: 0 20px;
  margin-bottom: 12px;
  flex: 1;
}

.category-card a {
  display: inline-block;
  margin: 0 20px 20px;
  font-size: 14px;
  font-weight: 500;
}

.category-desc-section {
  padding-top: 8px;
  padding-bottom: 48px;
}

.category-desc-content {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.category-desc-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

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

/* 指南页 */
.guide-hero-media {
  max-width: var(--container-width);
  margin: 24px auto 0;
  padding: 0 24px;
}

.guide-hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.guide-hero-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  text-align: center;
  padding-top: 8px;
}

.guide-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 8px;
}

.guide-section h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.guide-section > p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: 720px;
}

.guide-steps {
  counter-reset: guide-step;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 24px 0;
}

.guide-steps li {
  counter-increment: guide-step;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px 20px 64px;
  position: relative;
}

.guide-steps li::before {
  content: counter(guide-step);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.guide-steps h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
}

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

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

.tip-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.tip-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 8px;
}

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

.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 8px;
}

.related-links h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

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

.related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links li {
  margin: 0;
}

.related-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 20px;
  border-radius: 999px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

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

/* 榜单页 */
.ranking-section,
.recommendation-section,
.ranking-note {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.ranking-section h2,
.recommendation-section h2,
.ranking-note h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.ranking-section .ranking-list {
  gap: 16px;
}

.ranking-section .ranking-item {
  padding: 20px;
  flex-direction: column;
  gap: 12px;
}

.ranking-main {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  width: 100%;
}

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

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

.ranking-info h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
}

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

.ranking-tags span {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  background-color: var(--color-bg);
  color: var(--color-text-light);
}

.ranking-badge {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background-color: rgba(231, 76, 60, 0.1);
  color: var(--color-accent);
  white-space: nowrap;
  flex-shrink: 0;
}

.ranking-reason {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
  padding-left: 52px;
}

.recommendation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}

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

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

.recommendation-figure {
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-border);
}

.recommendation-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.recommendation-card:hover .recommendation-figure img {
  transform: scale(1.03);
}

.recommendation-content {
  padding: 20px;
}

.recommendation-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.recommendation-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

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

.ranking-note {
  padding-bottom: 48px;
}

.ranking-note p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 720px;
}

/* 更新页 */
.update-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.overview-banner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.overview-figure {
  margin: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--color-border);
}

.overview-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.overview-text h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.overview-text p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

.update-group {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.update-group h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-dark);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.update-group .update-list {
  gap: 16px;
}

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

.update-group .update-item:hover {
  box-shadow: var(--shadow-sm);
}

.update-group .update-cover {
  width: 64px;
  height: 84px;
  flex-shrink: 0;
}

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

.update-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.update-meta {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 6px;
}

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

.update-status-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.update-status-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.update-status-section > p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.status-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.status-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--color-text);
}

.status-tag {
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
}

.status-published {
  background-color: rgba(52, 152, 219, 0.1);
  color: var(--color-primary);
}

.status-paused {
  background-color: rgba(231, 76, 60, 0.1);
  color: var(--color-accent);
}

.status-upcoming {
  background-color: var(--color-bg);
  color: var(--color-text-light);
}

.update-status-section > p:last-child {
  margin-top: 16px;
}

.update-status-section > p a {
  font-weight: 500;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-list li {
  margin: 0;
}

.related-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 20px;
  border-radius: 999px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.related-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* 404 页 */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  flex: 1;
}

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

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

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

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

.error-home-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 32px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 32px;
}

.error-home-btn:hover {
  background-color: #217Dbb;
  color: var(--color-surface);
}

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

.error-suggest a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 20px;
  border-radius: 999px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.error-suggest a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

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

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

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

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
  }

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

  .brand-tagline {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    margin-left: 0;
  }

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

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

  .nav-list a {
    padding: 14px 16px;
    font-size: 15px;
    border-radius: var(--radius-sm);
  }

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

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

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

  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px;
  }

  .hero-copy {
    order: 1;
  }

  .hero-figure {
    order: 2;
  }

  .hero-figure img {
    height: 240px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .category-nav-section,
  .recent-updates-section,
  .ranking-preview-section,
  .guide-entry-section {
    padding: 32px 16px;
  }

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

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

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

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

  .ranking-main {
    flex-wrap: wrap;
  }

  .ranking-badge {
    margin-left: 52px;
  }

  .ranking-reason {
    padding-left: 0;
  }

  .overview-banner {
    grid-template-columns: 1fr;
  }

  .overview-figure {
    aspect-ratio: 16 / 9;
  }

  .update-group .update-item {
    flex-direction: column;
  }

  .update-group .update-cover {
    width: 100%;
    height: 180px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

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

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

  .page-header {
    padding: 24px 16px 8px;
  }

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

  .breadcrumb {
    padding: 12px 16px 0;
  }

  .category-section,
  .category-desc-section,
  .guide-section,
  .ranking-section,
  .recommendation-section,
  .ranking-note,
  .update-overview,
  .update-group,
  .update-status-section,
  .related-links {
    padding-left: 16px;
    padding-right: 16px;
  }

  .guide-hero-media {
    padding: 0 16px;
  }

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

  .guide-steps li {
    padding: 16px 16px 16px 56px;
  }

  .guide-steps li::before {
    left: 16px;
  }

  .category-desc-content {
    padding: 20px;
  }

  .error-main {
    padding: 48px 16px;
  }

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

@media (max-width: 390px) {
  .footer-links {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta .btn-primary,
  .hero-cta .btn-secondary {
    width: 100%;
  }

  .category-tags a,
  .related-links a,
  .error-suggest a {
    min-height: 44px;
  }
}

/* ==========================================================================
   utilities — 通用辅助
   ========================================================================== */

/* 滚动出现动画的基础状态：仅在支持时启用，不影响初始可见性 */
@media (prefers-reduced-motion: no-preference) {
  .category-card,
  .guide-card,
  .recommendation-card,
  .tip-card {
    transition: box-shadow var(--transition), transform var(--transition);
  }
}