/* ============================================================
   base / 基础变量与重置
   ============================================================ */
:root {
  --color-bg: #F7F7FA;
  --color-primary: #2B3A67;
  --color-accent: #FF6B35;
  --color-text: #444444;
  --color-card: #FFFFFF;
  --color-accent-soft: #FFF0E8;
  --color-border: #E5E5EC;
  --color-muted: #8A8FA3;
  --color-success: #3A9D6E;
  --shadow-card: 0 2px 10px rgba(43, 58, 103, 0.06);
  --shadow-card-hover: 0 8px 20px rgba(43, 58, 103, 0.12);
  --radius-sm: 4px;
  --radius-md: 8px;
  --container-width: 1200px;
  --header-height: 64px;
  --font-body: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-title: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-number: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition-base: 0.2s ease;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 15px;
  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-base);
}

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

ul,
ol {
  list-style: none;
}

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

/* ============================================================
   layout / 全站骨架
   ============================================================ */
.site-header {
  background-color: var(--color-card);
  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: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.site-brand a {
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

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

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: rgba(43, 58, 103, 0.06);
}

.nav-item.is-current .nav-link,
.nav-link.is-current {
  color: var(--color-primary);
  background-color: rgba(43, 58, 103, 0.08);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: var(--radius-sm);
}

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

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

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

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

.site-footer {
  background-color: var(--color-accent-soft);
  border-top: 1px solid rgba(255, 107, 53, 0.15);
  margin-top: auto;
}

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

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

.footer-brand-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.footer-nav-list li {
  margin-bottom: 6px;
}

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

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

.footer-feedback-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
  line-height: 1.6;
}

.footer-copyright {
  font-size: 13px;
  color: var(--color-muted);
  border-top: 1px solid rgba(255, 107, 53, 0.15);
  padding-top: 16px;
  margin-top: 16px;
}

/* ============================================================
   components / 公共组件
   ============================================================ */
/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

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

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

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

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

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

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

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

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

.page-title {
  font-family: var(--font-title);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 720px;
  line-height: 1.6;
}

/* section 标题 */
.section-title {
  font-family: var(--font-title);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
}

.section-desc {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading .section-title {
  margin-bottom: 6px;
}

/* 链接更多 */
.link-more {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  padding: 6px 0;
}

.link-more:hover {
  color: var(--color-primary);
}

/* 封面卡（首页封面墙 & 列表页封面网格） */
.cover-card {
  display: block;
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

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

.cover-name,
.cover-title {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 10px 12px 2px;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cover-tag {
  display: block;
  font-size: 12px;
  color: var(--color-muted);
  padding: 0 12px 10px;
}

/* ============================================================
   pages / 首页
   ============================================================ */
/* Hero 区 */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0 56px;
}

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

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

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-title {
  font-family: var(--font-title);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.hero-desc {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
}

.hero-update-index {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
}

.hero-update-index .section-subtitle {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

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

.update-index-item a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text);
  padding: 2px 0;
}

.update-index-item a::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
  align-self: center;
}

.update-index-item a:hover {
  color: var(--color-accent);
}

.btn-primary {
  display: inline-block;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  align-self: flex-start;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

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

/* 题材分类快捷入口 */
.category-nav-section {
  padding: 40px 0;
}

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

.category-tag {
  display: inline-block;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}

.category-tag:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* 最近更新封面墙 */
.recent-wall-section {
  padding: 40px 0;
}

.recent-wall-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

/* 人气榜 */
.rank-section {
  padding: 40px 0;
}

.rank-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
  align-items: start;
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rank-item {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base);
}

.rank-item:hover {
  box-shadow: var(--shadow-card-hover);
}

.rank-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--color-text);
}

.rank-item .tag {
  display: inline-block;
  font-size: 12px;
  color: var(--color-muted);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  flex-shrink: 0;
}

.rank-thumb {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

/* 阅读说明与引导 */
.reading-guide-section {
  padding: 40px 0;
}

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

.guide-card {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.guide-card-title {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.guide-card-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.guide-note {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 16px;
}

.guide-note a {
  color: var(--color-accent);
  font-weight: 500;
}

/* ============================================================
   pages / 全部漫画列表页
   ============================================================ */
.filter-section {
  margin-bottom: 32px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.filter-link {
  display: inline-block;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 14px;
  color: var(--color-text);
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}

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

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

.cover-grid-section {
  margin-bottom: 32px;
}

.cover-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.cover-figure {
  overflow: hidden;
}

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

/* 分页 */
.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
}

.page-info {
  font-size: 14px;
  color: var(--color-muted);
}

.pagination-buttons {
  display: flex;
  gap: 8px;
}

.page-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  border-radius: var(--radius-sm);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.page-link:hover {
  background-color: var(--color-primary);
  color: #fff;
}

.page-link.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* 列表页辅助链接 */
.list-help-section {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  margin-top: 32px;
}

.help-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}

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

.help-links a {
  color: var(--color-accent);
  font-weight: 500;
}

/* ============================================================
   pages / 人气榜页
   ============================================================ */
.rank-section.rank-new,
.rank-section.rank-favorite {
  padding: 0;
  margin-bottom: 40px;
}

.rank-head {
  margin-bottom: 20px;
}

.rank-head .section-title {
  margin-bottom: 4px;
}

.rank-list-new,
.rank-list-favorite {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rank-list-new .rank-item,
.rank-list-favorite .rank-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
}

.rank-num {
  font-family: var(--font-number);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  width: 32px;
  text-align: center;
  flex-shrink: 0;
}

.rank-cover {
  width: 56px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.rank-cover img {
  width: 56px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

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

.rank-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rank-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.rank-tags a {
  font-size: 12px;
  color: var(--color-muted);
  background-color: var(--color-bg);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.rank-note {
  font-size: 13px;
  color: var(--color-muted);
  flex-shrink: 0;
  white-space: nowrap;
}

.rank-tip {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.tip-content {
  margin-top: 12px;
}

.tip-content p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}

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

.timeline-group {
  position: relative;
  padding-left: 24px;
  margin-bottom: 32px;
}

.timeline-group::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background-color: var(--color-border);
}

.timeline-date {
  position: relative;
  margin-bottom: 16px;
}

.timeline-date::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-card);
}

.date-label {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

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

.update-card {
  display: flex;
  gap: 16px;
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base);
}

.update-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.update-card-media {
  width: 72px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.update-card-media img {
  width: 72px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

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

.update-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

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

.update-status {
  display: inline-block;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
}

.update-status.is-ongoing {
  background-color: rgba(255, 107, 53, 0.12);
  color: var(--color-accent);
}

.update-status.is-finished {
  background-color: rgba(58, 157, 110, 0.12);
  color: var(--color-success);
}

.update-note {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.note-content {
  margin-top: 12px;
}

.note-content p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}

/* ============================================================
   pages / 阅读指南页
   ============================================================ */
.step-progress-section {
  margin-bottom: 40px;
}

.step-progress-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.step-item {
  position: relative;
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  box-shadow: var(--shadow-card);
  border-top: 3px solid var(--color-border);
}

.step-item.is-done {
  border-top-color: var(--color-success);
}

.step-item.is-current {
  border-top-color: var(--color-accent);
}

.step-marker {
  display: block;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-border);
  color: var(--color-card);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}

.step-item.is-done .step-marker {
  background-color: var(--color-success);
}

.step-item.is-current .step-marker {
  background-color: var(--color-accent);
}

.step-info {
  display: block;
}

.step-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.step-desc {
  display: block;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

.step-link {
  display: inline-block;
  font-size: 13px;
  color: var(--color-accent);
  margin-top: 10px;
  font-weight: 500;
}

/* 阅读演示区 */
.reading-demo-section {
  margin-bottom: 40px;
}

.reading-demo-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  margin-top: 24px;
  align-items: start;
}

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

.demo-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.demo-caption {
  font-size: 13px;
  color: var(--color-muted);
  text-align: center;
  padding: 8px;
  background-color: var(--color-card);
}

.demo-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.demo-chapter-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
}

.demo-btn-group {
  display: flex;
  gap: 8px;
}

.demo-btn {
  display: inline-block;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

.demo-tip {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

/* 离线说明 */
.offline-note-section {
  margin-bottom: 40px;
}

.offline-content {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.offline-block {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.offline-block-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.offline-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.offline-list li {
  font-size: 14px;
  color: var(--color-text);
  padding-left: 16px;
  position: relative;
}

.offline-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.offline-cta {
  background-color: var(--color-accent-soft);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
}

.offline-cta p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.text-link {
  color: var(--color-accent);
  font-weight: 500;
}

/* 相关链接 */
.related-links {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.related-list a {
  font-size: 14px;
  color: var(--color-primary);
  padding: 6px 0;
  display: inline-block;
}

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

/* ============================================================
   pages / 常见问题页
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

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

.faq-group {
  margin-bottom: 32px;
  scroll-margin-top: 80px;
}

.faq-group-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

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

.faq-item {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  list-style: none;
  position: relative;
  padding-right: 40px;
  transition: background-color var(--transition-base);
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-accent);
  font-weight: 400;
}

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

.faq-item[open] summary {
  background-color: rgba(43, 58, 103, 0.03);
}

.faq-item summary:hover {
  background-color: rgba(43, 58, 103, 0.04);
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}

/* 侧栏 */
.faq-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-width: 0;
}

.sidebar-block {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

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

.sidebar-nav-item a {
  display: block;
  font-size: 14px;
  color: var(--color-text);
  padding: 6px 0;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base);
}

.sidebar-nav-item a:hover {
  color: var(--color-accent);
}

.sidebar-figure {
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 12px;
}

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

.sidebar-feedback-desc {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: 12px;
}

.sidebar-feedback-link a {
  color: var(--color-accent);
  font-weight: 500;
  font-size: 14px;
}

.sidebar-copyright-desc {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* FAQ 页底部相关链接 */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  padding: 4px 8px;
}

/* ============================================================
   pages / 404 页
   ============================================================ */
.error-main {
  flex: 1 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
}

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

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

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

.error-desc {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

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

.error-btn {
  display: inline-block;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

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

.error-link {
  display: inline-block;
  font-size: 15px;
  color: var(--color-primary);
  padding: 10px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

.error-tip {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 24px;
}

/* ============================================================
   responsive / 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cover-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .rank-layout {
    grid-template-columns: 1fr;
  }

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

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

  .nav-toggle {
    display: flex;
  }

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

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

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 15px;
  }

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

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

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

  .page-title {
    font-size: 28px;
  }

  .hero-section {
    padding: 32px 0 40px;
  }

  .hero-title {
    font-size: 28px;
  }

  .category-tags {
    gap: 8px;
  }

  .category-tag {
    padding: 6px 16px;
    font-size: 13px;
  }

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

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

  .cover-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

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

  .faq-sidebar {
    order: 2;
  }

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

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

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

  .rank-list-new .rank-item,
  .rank-list-favorite .rank-item {
    flex-wrap: wrap;
    gap: 10px;
  }

  .rank-note {
    width: 100%;
    padding-left: 48px;
    white-space: normal;
  }

  .help-links {
    grid-template-columns: 1fr;
  }

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

  .update-card {
    flex-wrap: wrap;
  }

  .update-card-media {
    width: 64px;
  }

  .update-card-media img {
    width: 64px;
  }

  .breadcrumb {
    margin-bottom: 16px;
  }

  .breadcrumb-list {
    margin-bottom: 16px;
  }

  .page-header {
    margin-bottom: 24px;
  }

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

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

@media (max-width: 480px) {
  .cover-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .recent-wall-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .cover-name,
  .cover-title {
    font-size: 13px;
    padding: 8px 8px 2px;
  }

  .cover-tag {
    font-size: 11px;
    padding: 0 8px 8px;
  }

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

  .rank-item {
    padding: 10px 12px;
  }

  .rank-item a {
    font-size: 14px;
  }

  .update-card {
    padding: 10px 12px;
  }

  .update-card-media {
    width: 56px;
  }

  .update-card-media img {
    width: 56px;
  }

  .rank-num {
    font-size: 18px;
    width: 24px;
  }

  .rank-cover {
    width: 44px;
  }

  .rank-cover img {
    width: 44px;
  }

  .rank-name {
    font-size: 14px;
  }

  .demo-btn-group {
    flex-direction: column;
  }

  .demo-btn {
    text-align: center;
  }

  .filter-link {
    padding: 4px 12px;
    font-size: 13px;
  }

  .pagination-nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-update-index {
    padding: 12px 16px;
  }

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

  .guide-card {
    padding: 20px 16px;
  }

  .offline-block {
    padding: 20px 16px;
  }

  .faq-item summary {
    padding: 12px 16px;
    padding-right: 36px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 16px 12px;
  }

  .sidebar-block {
    padding: 16px;
  }

  .related-links {
    padding: 16px;
  }
}