/* ==========================================================================
   base - 基础变量与全局样式
   ========================================================================== */

:root {
  --color-primary: #2F5A88;
  --color-primary-dark: #24466b;
  --color-primary-light: #e8eef5;
  --color-accent: #F08A5D;
  --color-accent-dark: #d9754a;
  --color-accent-light: #fef0e9;
  --color-bg: #F5F7FA;
  --color-card: #FFFFFF;
  --color-text: #334155;
  --color-text-secondary: #94A3B8;
  --color-border: #e2e8f0;
  --color-success: #2f9e6e;
  --color-warning: #c47a2f;
  --color-paused: #7a8ba3;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 2px 8px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 6px 20px rgba(15, 23, 42, 0.1);

  --container-width: 1200px;
  --header-height: 64px;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

html {
  font-size: 15px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  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 {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

p {
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   layout - 全站骨架布局
   ========================================================================== */

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

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
}

.brand-slogan {
  font-size: 13px;
  color: var(--color-text-secondary);
  display: none;
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 700;
  background-color: var(--color-primary-light);
}

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

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

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

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

.footer-brand {
  flex: 1 1 280px;
  max-width: 360px;
}

.footer-slogan {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.footer-links {
  flex: 2 1 500px;
  display: flex;
  gap: 32px;
  justify-content: space-between;
  flex-wrap: wrap;
}

.footer-col {
  min-width: 120px;
}

.footer-heading {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

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

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

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.copyright {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.back-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}

.back-top:hover {
  background-color: var(--color-primary);
  color: var(--color-card);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

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

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

.breadcrumb-sep {
  color: var(--color-border);
  margin: 0 2px;
}

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

/* 页面标题区 */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

/* 通用区块标题 */
.section-heading {
  margin-bottom: 20px;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.section-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   components - 通用组件
   ========================================================================== */

/* 封面图容器 */
figure {
  overflow: hidden;
}

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

/* 状态标签 */
.status-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  line-height: 1.5;
}

.status-badge.updating,
.status-badge.is-ongoing {
  background-color: var(--color-accent-light);
  color: var(--color-accent-dark);
}

.status-badge.completed,
.status-badge.is-finished {
  background-color: #e6f4ed;
  color: var(--color-success);
}

.status-badge.paused {
  background-color: #eef1f5;
  color: var(--color-paused);
}

.status-badge.new {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* 文本链接 */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  border-bottom: 1px solid transparent;
}

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

/* 更多链接 */
.section-more {
  margin-top: 20px;
  text-align: center;
}

.more-link {
  display: inline-block;
  padding: 8px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 24px auto 0;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--color-border);
}

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

.related-links-item {
  font-size: 14px;
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: 999px;
  background-color: var(--color-primary-light);
}

.related-links-item:hover {
  background-color: var(--color-primary);
  color: var(--color-card);
}

/* 内容媒体图 */
.content-media {
  margin: 16px 0;
}

.content-media-inline {
  max-width: 640px;
}

.content-media-inline img {
  border-radius: var(--radius-lg);
}

.content-media-inline figcaption {
  padding: 8px 4px;
  font-size: 13px;
  color: var(--color-text-secondary);
  text-align: center;
}

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-card);
}

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

.btn-secondary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* ==========================================================================
   components - 首页模块
   ========================================================================== */

/* 首屏混合门户 */
.hero-mixed {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.hero-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 20px;
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
}

.hero-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
}

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

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

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.hero-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  min-height: 44px;
  padding: 10px 28px;
  background-color: var(--color-accent);
  color: var(--color-card);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.hero-cta:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-card);
}

.hero-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-left: 24px;
  border-left: 1px solid var(--color-border);
}

.side-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

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

.tag-item {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.tag-item:hover {
  background-color: var(--color-primary);
  color: var(--color-card);
}

.hero-news {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 16px;
}

.news-heading {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

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

.news-item {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  padding-left: 12px;
  position: relative;
}

.news-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* 题材分类封面墙 */
.category-wall {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 0;
}

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

.category-card {
  display: block;
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.category-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.category-card h3 {
  padding: 14px 16px 4px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
}

.category-card p {
  padding: 0 16px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* 最近更新网格 */
.latest-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 0;
}

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

.comic-card {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.comic-link {
  display: block;
}

.comic-link img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.comic-title {
  padding: 12px 16px 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.comic-meta {
  padding: 0 16px 14px;
}

/* 人气榜单 */
.ranking-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 0;
}

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

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

.rank-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 8px;
  border-bottom: 1px solid var(--color-border);
}

.rank-item:last-child {
  border-bottom: none;
}

.rank-link {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 0;
}

.rank-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.rank-item:nth-child(1) .rank-num,
.rank-item:nth-child(2) .rank-num,
.rank-item:nth-child(3) .rank-num {
  background-color: var(--color-accent);
  color: var(--color-card);
}

.rank-cover {
  width: 48px;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

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

.rank-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-tag {
  font-size: 13px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

/* 专题书单横向轨道 */
.topic-track {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 0;
}

.topic-scroll {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.topic-card {
  display: block;
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.topic-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.topic-name {
  padding: 12px 16px 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.topic-desc {
  padding: 0 16px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* 阅读指引步骤 */
.guide-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 0;
}

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

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

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-card);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.step-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

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

/* 声明摘要 */
.statement-summary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 0;
}

.statement-summary .section-title {
  margin-bottom: 12px;
}

.statement-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 760px;
  margin-bottom: 16px;
}

/* ==========================================================================
   pages - 内页专属模块
   ========================================================================== */

/* --- 题材分类页 --- */
.tag-cloud {
  margin-bottom: 40px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list .tag-item {
  padding: 8px 18px;
  font-size: 14px;
}

.category-group {
  margin-bottom: 40px;
}

.group-head {
  margin-bottom: 16px;
}

.group-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.group-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
}

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

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

.comic-figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.comic-name {
  padding: 12px 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.comic-brief {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.more-topics {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.more-topics-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.more-topics-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.more-topics-links a {
  display: inline-block;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: 999px;
}

.more-topics-links a:hover {
  background-color: var(--color-primary);
  color: var(--color-card);
}

/* --- 最新更新页 --- */
.module-block {
  margin-bottom: 40px;
}

.highlight-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

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

.highlight-content {
  padding: 24px 24px 24px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.highlight-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
}

.highlight-title a {
  color: var(--color-text);
}

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

.highlight-meta {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.highlight-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

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

.update-date {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary-light);
}

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

.update-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 10px 16px;
}

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

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

.item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

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

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

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

.legend-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.legend-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

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

.related-list a {
  display: inline-block;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: 999px;
}

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

/* --- 人气榜单页 --- */
.rank-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.rank-tab {
  display: inline-block;
  padding: 8px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-secondary);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.rank-tab:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.rank-tab.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-card);
}

.rank-section {
  margin-bottom: 40px;
}

.rank-section .section-desc {
  margin-bottom: 16px;
}

.rank-list.hot-list {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 12px 20px;
}

.rank-item .rank-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.rank-item:nth-child(1) .rank-number,
.rank-item:nth-child(2) .rank-number,
.rank-item:nth-child(3) .rank-number {
  background-color: var(--color-accent);
  color: var(--color-card);
}

.rank-item .rank-cover {
  width: 48px;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

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

.rank-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.rank-name a {
  color: var(--color-text);
}

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

.rank-meta {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.rank-status {
  flex-shrink: 0;
}

.rank-footer-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 12px;
  text-align: right;
}

.rank-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.rank-duo .rank-list {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 12px 20px;
}

.rank-aside {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  margin-top: 8px;
}

.aside-tip {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.aside-tip a {
  display: inline-block;
  margin-top: 8px;
  margin-right: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

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

/* --- 专题书单页 --- */
.topic-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.topic-card-link {
  display: block;
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.topic-card-figure {
  position: relative;
}

.topic-card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.topic-card-caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 12px;
  background-color: rgba(47, 90, 136, 0.85);
  color: var(--color-card);
  font-size: 13px;
  border-radius: 999px;
}

.topic-card-title {
  padding: 12px 16px 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.topic-card-desc {
  padding: 0 16px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.topic-detail {
  margin-top: 48px;
}

.section-intro {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.topic-detail-block {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin-bottom: 24px;
}

.topic-detail-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.topic-detail-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text);
}

.topic-detail-tag {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
}

.topic-detail-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.topic-comic-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.topic-comic-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 12px;
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
}

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

.topic-comic-info {
  min-width: 0;
}

.topic-comic-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.topic-comic-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.topic-related .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 0;
  border-top: none;
}

.topic-related .related-links li {
  margin: 0;
}

.topic-related .related-links a {
  display: inline-block;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: 999px;
}

.topic-related .related-links a:hover {
  background-color: var(--color-primary);
  color: var(--color-card);
}

/* --- 阅读指南页 --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-card);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-card .step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.step-card .step-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.step-card .step-text a {
  display: inline-block;
  margin-top: 8px;
  font-weight: 600;
  color: var(--color-primary);
}

.guide-faq {
  margin-top: 48px;
}

.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-sm);
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-question::after {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.guide-visual {
  margin-top: 48px;
}

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

.guide-image {
  width: 100%;
  max-height: 360px;
  object-fit: cover;
}

.guide-caption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background-color: var(--color-card);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.guide-safety {
  margin-top: 48px;
}

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

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

.safety-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.safety-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.guide-more {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.guide-more-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.guide-more-text a {
  display: inline-block;
  margin-top: 8px;
  margin-right: 16px;
  font-weight: 600;
  color: var(--color-primary);
}

.guide-more-text a:hover {
  color: var(--color-accent);
}

/* --- 网站声明页 --- */
.statement-block {
  margin-bottom: 32px;
  max-width: 760px;
}

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

.statement-block p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.statement-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.statement-links h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}

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

.statement-links li {
  margin: 0;
}

.statement-links a {
  display: inline-block;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border-radius: 999px;
}

.statement-links a:hover {
  background-color: var(--color-primary);
  color: var(--color-card);
}

/* --- 站点地图页 --- */
.sitemap-section {
  margin-bottom: 40px;
}

.sitemap-section .section-title {
  margin-bottom: 12px;
}

.sitemap-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.sitemap-item {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 14px 20px;
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.sitemap-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
}

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

.sitemap-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

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

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

.scope-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.scope-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* --- 404 页 --- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  flex: 1;
}

.error-panel {
  text-align: center;
  max-width: 520px;
}

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

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

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

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

/* ==========================================================================
   responsive - 响应式适配
   ========================================================================== */

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

  .hero-side {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
  }

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

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

@media (max-width: 768px) {
  .header-inner {
    height: 56px;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: flex;
    flex-shrink: 0;
  }

  .site-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    z-index: 99;
  }

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

  .site-nav .nav-list.is-open {
    display: flex;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
  }

  .nav-item {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    padding: 12px 8px;
    font-size: 15px;
    border-radius: 0;
  }

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

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

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

  .category-grid,
  .update-grid,
  .comic-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .topic-scroll {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .steps-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

  .highlight-content {
    padding: 0 20px 20px;
  }

  .legend-grid,
  .safety-grid,
  .scope-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .topic-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-inner {
    gap: 24px;
  }

  .footer-links {
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .category-grid,
  .update-grid,
  .comic-grid,
  .topic-scroll,
  .topic-cards {
    grid-template-columns: 1fr;
  }

  .hero-layout {
    padding: 20px 16px;
  }

  .category-wall,
  .latest-grid,
  .ranking-list,
  .topic-track,
  .guide-steps,
  .statement-summary {
    padding: 32px 16px 0;
  }

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

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

  .rank-wrapper {
    padding: 12px;
  }

  .rank-cover {
    width: 40px;
    height: 54px;
  }

  .rank-tag {
    display: none;
  }

  .update-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .item-cover {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }

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

/* 动效增强 - 仅在用户未开启减少动态效果时应用 */
@media (prefers-reduced-motion: no-preference) {
  .category-card img,
  .comic-link img,
  .topic-card img,
  .hero-figure img,
  .comic-figure img,
  .highlight-media img,
  .item-cover,
  .topic-card-img,
  .topic-comic-img,
  .guide-image {
    transition: transform 0.3s ease;
  }

  .category-card:hover img,
  .comic-link:hover img,
  .topic-card:hover img,
  .hero-figure:hover img,
  .comic-figure:hover img,
  .highlight-media:hover img,
  .item-cover:hover,
  .topic-card-img:hover,
  .topic-comic-img:hover,
  .guide-image:hover {
    transform: scale(1.03);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}