/* ==========================================================================
   日动漫 · 全局样式表
   版本：1.0
   说明：本样式表服务于 yaojiaoks.com 全站，覆盖首页、内页、404 页。
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --color-white: #ffffff;
  --color-bg: #f5f7fa;
  --color-text: #2c3e50;
  --color-primary: #3498db;
  --color-accent: #e67e22;
  --color-border: #ecf0f1;
  --color-text-light: #6b7a8f;
  --color-text-lighter: #95a5a6;
  --color-card-bg: #ffffff;
  --color-footer-bg: #2c3e50;
  --color-footer-text: #b0c4d8;
  --radius: 8px;
  --shadow-sm: 0 1px 3px rgba(44, 62, 80, 0.08);
  --shadow-md: 0 4px 12px rgba(44, 62, 80, 0.1);
  --shadow-hover: 0 8px 20px rgba(44, 62, 80, 0.14);
  --container-width: 1200px;
  --header-height: 64px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --transition: 0.25s 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-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

figure {
  margin: 0;
}

.visually-hidden {
  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
   ========================================================================== */

/* 页面主体骨架：统一背景与最小高度 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

/* 页头 */
.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 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.brand-slogan {
  font-size: 12px;
  color: var(--color-text-lighter);
  line-height: 1.2;
}

/* 主导航 */
.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;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.nav-list li a:hover {
  color: var(--color-primary);
  background-color: rgba(52, 152, 219, 0.08);
}

.nav-list li a.is-current {
  color: var(--color-primary);
  background-color: rgba(52, 152, 219, 0.12);
  font-weight: 600;
}

/* 移动端导航按钮，桌面隐藏 */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  position: relative;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
}

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

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

/* 主内容区 */
.site-main {
  flex: 1;
  width: 100%;
}

/* 内页主容器 */
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
  width: 100%;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-lighter);
  margin-bottom: 20px;
  padding: 8px 0;
}

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

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

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

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

/* 页面标题区（内页统一） */
.page-header {
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 760px;
  margin-bottom: 0;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px 24px;
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-info {
  flex: 1 1 300px;
}

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

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-footer-text);
  max-width: 420px;
  margin-bottom: 0;
}

.footer-links {
  flex: 0 1 280px;
}

.footer-links h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 14px;
}

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

.footer-links ul li a {
  font-size: 14px;
  color: var(--color-footer-text);
}

.footer-links ul li a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 20px;
  font-size: 13px;
  color: rgba(176, 196, 216, 0.7);
  text-align: center;
}

/* ==========================================================================
   components — 通用组件：按钮、卡片、标签、时间轴、榜单、FAQ、相关链接
   ========================================================================== */

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

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

.btn-primary:hover {
  background-color: #2980b9;
  color: var(--color-white);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: rgba(52, 152, 219, 0.08);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* 文字链接 */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  margin-top: 16px;
}

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

/* 区块标题与描述 */
.section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

/* 卡片网格（首页最近更新） */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.media-card {
  background-color: var(--color-card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.media-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.media-card a {
  display: block;
  text-decoration: none;
  color: var(--color-text);
}

.media-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.media-card h3 {
  font-size: 16px;
  font-weight: 600;
  padding: 12px 14px 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.update-status {
  padding: 0 14px 14px;
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
}

/* 更新日历（首页时间轴） */
.calendar-timeline {
  position: relative;
  padding-left: 24px;
}

.calendar-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 20px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.timeline-date {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.timeline-item ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-item ul li a {
  display: inline-block;
  font-size: 14px;
  padding: 4px 12px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
  transition: all var(--transition);
}

.timeline-item ul li a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* 题材分类标签（首页） */
.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.category-tags li a {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

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

/* 人气榜单（首页与榜单页共用） */
.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ranking-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background-color: var(--color-card-bg);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.rank-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  min-width: 40px;
  text-align: center;
}

.ranking-item img {
  width: 72px;
  height: 96px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}

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

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

.rank-info p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 经典作品时间轴（首页） */
.timeline-classic {
  position: relative;
  padding-left: 80px;
}

.timeline-classic::before {
  content: "";
  position: absolute;
  left: 32px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.classic-node {
  position: relative;
  margin-bottom: 28px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.classic-node::before {
  content: "";
  position: absolute;
  left: -56px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.year-label {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  min-width: 60px;
  line-height: 1.2;
}

.classic-content {
  flex: 1;
  min-width: 0;
}

.classic-content img {
  width: 100%;
  max-width: 200px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 8px;
}

.classic-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.classic-content p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* 指南与反馈两栏卡片（首页） */
.guide-feedback-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.guide-card,
.feedback-card {
  background-color: var(--color-card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.guide-card h2,
.feedback-card h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.guide-card p,
.feedback-card p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-left: 12px;
}

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

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

/* 相关链接（内页底部） */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.related-links h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

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

.related-list li a {
  display: inline-block;
  padding: 8px 18px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--color-text);
  transition: all var(--transition);
}

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

/* ==========================================================================
   pages — 首页
   ========================================================================== */

/* 首页主体 */
.home-main {
  width: 100%;
}

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

.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  max-width: 520px;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

.hero-content .btn-primary,
.hero-content .btn-secondary {
  margin-right: 12px;
  margin-bottom: 12px;
}

.hero-media {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.hero-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
}

/* Hero 右侧最近更新列表 */
.hero-updates {
  background-color: var(--color-bg);
  border-radius: var(--radius);
  padding: 20px;
}

.hero-updates h2 {
  font-size: 16px;
  margin-bottom: 12px;
}

.update-mini-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.update-mini-list li {
  padding: 8px 12px;
  background-color: var(--color-white);
  border-radius: 6px;
  border-left: 3px solid var(--color-primary);
}

.update-mini-list li a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.update-mini-list li a:hover {
  color: var(--color-primary);
}

.mini-link {
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
}

/* 首页各 section 通用间距 */
.calendar-section,
.category-nav-section,
.recent-updates-section,
.ranking-preview-section,
.classic-timeline-section,
.guide-feedback-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px;
}

.calendar-section,
.recent-updates-section,
.classic-timeline-section {
  border-bottom: 1px solid var(--color-border);
}

.calendar-section h2,
.category-nav-section h2,
.recent-updates-section h2,
.ranking-preview-section h2,
.classic-timeline-section h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

/* 首页最近更新卡片标题 */
.recent-updates-section {
  background-color: var(--color-white);
}

/* ==========================================================================
   pages — 内页通用（分类 / 指南 / 经典 / 榜单 / 反馈）
   ========================================================================== */

/* 分类页：侧栏 + 内容 */
.page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}

/* 侧栏在前的变体 */
.sidebar-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}

.category-sidebar {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 84px;
}

.category-sidebar h2 {
  font-size: 16px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.category-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.category-list li a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--color-text);
  transition: all var(--transition);
}

.category-list li a:hover {
  background-color: rgba(52, 152, 219, 0.08);
  color: var(--color-primary);
}

.sidebar-note {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-lighter);
}

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

/* 分类页作品区块 */
.works-section {
  margin-bottom: 40px;
}

.works-section h2 {
  font-size: 20px;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.work-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.work-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.work-cover {
  margin: 0;
  overflow: hidden;
}

.work-cover img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.work-card:hover .work-cover img {
  transform: scale(1.03);
}

.work-card h3 {
  font-size: 15px;
  font-weight: 600;
  padding: 12px 14px 4px;
}

.work-status {
  padding: 0 14px;
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
}

.work-brief {
  padding: 0 14px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 指南页 */
.guide-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 40px;
}

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

.intro-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.intro-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.intro-media figcaption {
  padding: 8px 12px;
  font-size: 13px;
  color: var(--color-text-lighter);
  background-color: var(--color-white);
}

/* 收藏步骤 */
.collect-guide,
.calendar-guide,
.tracking-tips {
  margin-bottom: 40px;
}

.collect-guide h2,
.calendar-guide h2,
.tracking-tips h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

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

.collect-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  counter-reset: step;
}

.collect-step {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-content h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.collect-tip {
  margin-top: 20px;
  padding: 14px 20px;
  background-color: rgba(230, 126, 34, 0.08);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  font-size: 14px;
  color: var(--color-text);
}

/* 日历指南 */
.calendar-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.calendar-feature {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.calendar-feature h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.calendar-feature p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.calendar-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}

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

.calendar-media figcaption {
  padding: 8px 12px;
  font-size: 13px;
  color: var(--color-text-lighter);
  background-color: var(--color-white);
}

/* 追更技巧 */
.tips-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.tips-list li {
  padding: 14px 18px;
  background-color: var(--color-white);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-primary);
  font-size: 14px;
  box-shadow: var(--shadow-sm);
}

/* 指南页相关卡片 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.related-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.related-card h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.related-card p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* 经典页 */
.classic-timeline {
  margin-bottom: 48px;
}

.classic-timeline > h2,
.recommendation > h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.classic-timeline > p,
.recommendation > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 28px;
}

.timeline-list {
  position: relative;
  padding-left: 40px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-year {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-content {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  align-items: start;
}

.timeline-media figure {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.timeline-media img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.timeline-text h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

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

/* 经典页推荐卡片 */
.recommendation-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.recommendation-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

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

.recommendation-card p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 0;
  line-height: 1.6;
}

.recommendation-note {
  font-size: 14px;
  color: var(--color-text-lighter);
  padding: 12px 16px;
  background-color: var(--color-white);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
}

/* 榜单页 */
.rank-section {
  margin-bottom: 48px;
}

.section-title {
  font-size: 22px;
  margin-bottom: 8px;
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.rank-item {
  background-color: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.rank-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 20px;
}

.rank-card .rank-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-primary);
  min-width: 40px;
  text-align: center;
}

.rank-cover {
  flex-shrink: 0;
  width: 80px;
  height: 106px;
  border-radius: 4px;
  overflow: hidden;
}

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

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

.rank-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.rank-status {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 4px;
}

.rank-reason {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 榜单页最近章节 */
.chapter-section {
  margin-bottom: 40px;
}

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

.chapter-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background-color: var(--color-white);
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
  font-size: 14px;
}

.chapter-work {
  font-weight: 600;
  color: var(--color-text);
  flex: 0 0 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chapter-num {
  color: var(--color-primary);
  flex: 1;
}

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

.chapter-tip {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-light);
}

.chapter-tip a {
  margin-right: 12px;
}

/* 反馈页 */
.faq-section {
  margin-bottom: 48px;
}

.faq-section > h2,
.feedback-entry > h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

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

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

.feedback-tips {
  margin: 16px 0;
  padding-left: 0;
}

.feedback-tips li {
  padding: 8px 0 8px 24px;
  position: relative;
  font-size: 14px;
  color: var(--color-text);
}

.feedback-tips li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.feedback-figure {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.feedback-figure figcaption {
  padding: 8px 12px;
  font-size: 13px;
  color: var(--color-text-lighter);
  background-color: var(--color-white);
}

/* ==========================================================================
   pages — 404 页
   ========================================================================== */

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

.error-panel {
  max-width: 560px;
  text-align: center;
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 48px 40px;
  box-shadow: var(--shadow-md);
}

.error-panel h1 {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-lead {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.btn-back-home {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  margin-bottom: 24px;
}

.btn-back-home:hover {
  background-color: #2980b9;
  color: var(--color-white);
  transform: translateY(-2px);
}

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

.error-help a {
  margin: 0 8px;
}

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

/* 平板及以下：≤ 1024px */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

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

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

  .timeline-content {
    grid-template-columns: 160px 1fr;
    gap: 16px;
  }

  .hero-section {
    gap: 32px;
  }
}

/* 手机端：≤ 768px */
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    min-height: var(--header-height);
    padding: 12px 16px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 12px 0;
    border-top: 1px solid var(--color-border);
  }

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

  .nav-list li a {
    padding: 12px 16px;
    border-radius: 6px;
  }

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

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

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

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

  .page-layout,
  .sidebar-left {
    grid-template-columns: 1fr;
  }

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

  .category-content {
    order: 2;
  }

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

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

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

  .calendar-features {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .timeline-list {
    padding-left: 24px;
  }

  .timeline-item::before {
    left: -16px;
  }

  .rank-card {
    flex-wrap: wrap;
    gap: 12px;
  }

  .rank-card .rank-num {
    min-width: 28px;
  }

  .rank-cover {
    width: 64px;
    height: 84px;
  }

  .chapter-item {
    flex-wrap: wrap;
    gap: 8px;
  }

  .chapter-work {
    flex-basis: 100%;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 32px;
    padding: 32px 16px 20px;
  }

  .timeline-classic {
    padding-left: 56px;
  }

  .timeline-classic::before {
    left: 16px;
  }

  .classic-node::before {
    left: -36px;
  }

  .year-label {
    font-size: 22px;
    min-width: 48px;
  }

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

  .error-panel h1 {
    font-size: 56px;
  }
}

/* 小屏手机：≤ 480px */
@media (max-width: 480px) {
  .inner-main {
    padding: 16px 12px 40px;
  }

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

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

  .calendar-section,
  .category-nav-section,
  .recent-updates-section,
  .ranking-preview-section,
  .classic-timeline-section,
  .guide-feedback-section {
    padding: 32px 16px;
  }

  .hero-section {
    padding: 24px 16px;
  }

  .hero-content .btn-primary,
  .hero-content .btn-secondary {
    display: block;
    width: 100%;
    margin-right: 0;
  }

  .ranking-item {
    flex-wrap: wrap;
    gap: 12px;
  }

  .ranking-item img {
    width: 56px;
    height: 76px;
  }

  .rank-num {
    font-size: 20px;
    min-width: 28px;
  }

  .timeline-classic {
    padding-left: 40px;
  }

  .timeline-classic::before {
    left: 12px;
  }

  .classic-node {
    flex-direction: column;
    gap: 8px;
  }

  .classic-node::before {
    left: -28px;
    top: 4px;
  }

  .year-label {
    font-size: 20px;
  }

  .classic-content img {
    max-width: 140px;
  }

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

  .timeline-media img {
    max-width: 160px;
  }

  .rank-card {
    padding: 12px;
  }

  .rank-cover {
    width: 56px;
    height: 76px;
  }

  .rank-title {
    font-size: 15px;
  }

  .btn-primary,
  .btn-secondary {
    display: block;
    width: 100%;
    padding: 12px 16px;
  }

  .hero-content .btn-primary,
  .hero-content .btn-secondary {
    margin-bottom: 8px;
  }
}