/* ============================================================
   base
   ============================================================ */
:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-text: #2c3e50;
  --color-text-light: #5a6b7a;
  --color-primary: #3498db;
  --color-primary-dark: #2471a3;
  --color-accent: #e74c3c;
  --color-border: #e3e7eb;
  --color-status: #27ae60;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow: 0 1px 4px rgba(44, 62, 80, 0.08);
  --shadow-hover: 0 4px 12px rgba(44, 62, 80, 0.12);
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-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-primary-dark);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 20px;
}

h4 {
  font-size: 16px;
}

p {
  margin-bottom: 12px;
}

/* ============================================================
   layout
   ============================================================ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0;
  white-space: nowrap;
}

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

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

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

.nav-list a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

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

.nav-list a.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background-color: rgba(52, 152, 219, 0.1);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: 14px;
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--transition), background-color var(--transition);
}

.nav-toggle:hover {
  border-color: var(--color-primary);
  background-color: rgba(52, 152, 219, 0.05);
}

.nav-toggle-icon {
  display: inline-block;
  width: 16px;
  height: 12px;
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition), top var(--transition);
}

.nav-toggle-icon::before {
  top: 0;
}

.nav-toggle-icon::after {
  top: 10px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 5px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 5px;
  transform: rotate(-45deg);
}

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

.site-home {
  padding-bottom: 0;
}

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

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

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

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

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

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

.page-header {
  margin-bottom: 32px;
}

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

.page-description {
  margin-top: 12px;
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
}

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 0;
}

.footer-columns {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-group h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  letter-spacing: 0;
}

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

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

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

/* ============================================================
   components — 通用按钮、标签、卡片
   ============================================================ */
.btn-primary,
.btn-secondary,
.btn-back,
.btn-category {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
  min-height: 44px;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #ffffff;
}

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

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

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

.btn-back:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #ffffff;
}

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

.btn-category:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-text-light);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
  min-height: 36px;
}

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

.status {
  display: inline-block;
  padding: 3px 8px;
  font-size: 12px;
  border-radius: 999px;
  background-color: rgba(39, 174, 96, 0.1);
  color: var(--color-status);
  font-weight: 500;
  white-space: nowrap;
}

/* ============================================================
   components — 首页 hero
   ============================================================ */
.hero {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 40px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-text h1 {
  font-size: 32px;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-slogan {
  font-size: 17px;
  color: var(--color-text-light);
  margin-bottom: 28px;
  line-height: 1.7;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-figure {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

/* ============================================================
   components — 首页分类导航
   ============================================================ */
.category-nav {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 32px;
}

.category-nav h2 {
  font-size: 24px;
  margin-bottom: 16px;
  color: var(--color-text);
}

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

/* ============================================================
   components — 首页最近更新
   ============================================================ */
.updates {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

.updates h2 {
  font-size: 24px;
  margin-bottom: 24px;
  color: var(--color-text);
}

.update-group {
  margin-bottom: 28px;
}

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

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

.update-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.update-list li:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

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

.update-list li > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.update-list a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.update-list .status {
  align-self: flex-start;
}

/* ============================================================
   components — 首页人气榜单
   ============================================================ */
.ranking {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

.ranking h2 {
  font-size: 24px;
  margin-bottom: 24px;
  color: var(--color-text);
}

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

.rank-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.rank-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.rank-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background-color: rgba(52, 152, 219, 0.1);
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

.rank-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.rank-item h3 a {
  color: var(--color-text);
}

.rank-item h3 a:hover {
  color: var(--color-primary);
}

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

/* ============================================================
   components — 首页阅读指南入口
   ============================================================ */
.guide-entry {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px;
}

.guide-entry h2 {
  font-size: 24px;
  margin-bottom: 24px;
  color: var(--color-text);
}

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

.guide-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.guide-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.guide-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

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

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

.guide-card p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ============================================================
   components — 首页长尾专题预告
   ============================================================ */
.longtail-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.longtail-preview h2 {
  font-size: 24px;
  margin-bottom: 24px;
  color: var(--color-text);
}

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

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

.topic-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.topic-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.topic-card h3 {
  font-size: 18px;
  padding: 16px 20px 4px;
}

.topic-card h3 a {
  color: var(--color-text);
}

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

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

/* ============================================================
   components — 分类页
   ============================================================ */
.category-intro {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}

.intro-text h2 {
  margin-bottom: 16px;
  color: var(--color-text);
}

.intro-text p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.intro-media {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.intro-media figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  padding: 8px 12px;
  text-align: center;
}

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

.section-title {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 16px;
}

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

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

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

.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.category-card-media {
  width: 100%;
  overflow: hidden;
}

.category-card-media img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.category-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.category-card-body h3 {
  font-size: 18px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.category-direction {
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: 16px;
}

.category-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 500;
}

.category-tips {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}

.tips-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

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

/* ============================================================
   components — 阅读指南页
   ============================================================ */
.guide-section {
  margin-bottom: 48px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}

.guide-section h2 {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 16px;
}

.content-media {
  margin-bottom: 24px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.content-media figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  padding: 8px 12px;
  text-align: center;
}

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

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

.method-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.method-card h3 {
  font-size: 17px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

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

.detail-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.detail-item h3 {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

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

.check-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.check-item h3 {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.guide-links {
  background-color: transparent;
  border: none;
  padding: 0;
}

.guide-links h2 {
  margin-bottom: 8px;
}

.guide-links p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.guide-links p a {
  margin-right: 16px;
  font-weight: 500;
}

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

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

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

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

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

.faq-item summary:hover {
  background-color: rgba(52, 152, 219, 0.04);
}

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

/* ============================================================
   components — 恋爱漫画页
   ============================================================ */
.intro-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 32px;
}

.intro-section p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.intro-section p:last-child {
  margin-bottom: 0;
}

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

.recommend-section h2 {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.recommend-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.recommend-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.recommend-figure {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.recommend-content h3 {
  font-size: 20px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

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

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

.comparison-section h2 {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

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

.comparison-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.comparison-card h3 {
  font-size: 17px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.conclusion-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}

.conclusion-section h2 {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 12px;
}

.conclusion-section p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.conclusion-section p a {
  font-weight: 500;
}

/* ============================================================
   components — 热血漫画页
   ============================================================ */
.intro-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.recommend-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.work-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.work-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
}

.work-media {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.work-info h3 {
  font-size: 20px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.work-meta {
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-bg);
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

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

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

.analysis-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.analysis-item h3 {
  font-size: 17px;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.related-links p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.related-links p a {
  margin-right: 16px;
  font-weight: 500;
}

/* ============================================================
   components — 404 页
   ============================================================ */
.error-main {
  min-height: calc(100vh - 64px - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-section {
  text-align: center;
  max-width: 560px;
  padding: 48px 24px;
}

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

.error-section h1 {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 16px;
}

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

.error-action {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

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

/* ============================================================
   responsive — 768px 断点
   ============================================================ */
@media (max-width: 768px) {
  .header-inner {
    height: 56px;
    padding: 0 16px;
  }

  .brand {
    font-size: 18px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 4px;
    box-shadow: 0 4px 12px rgba(44, 62, 80, 0.08);
  }

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

  .nav-list a {
    padding: 12px 16px;
    font-size: 15px;
  }

  .site-nav {
    position: relative;
  }

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

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

  .hero-slogan {
    font-size: 15px;
  }

  .hero-figure img {
    height: 220px;
  }

  .category-nav {
    padding: 24px 16px;
  }

  .tags-list {
    gap: 8px;
  }

  .tag {
    padding: 8px 12px;
    font-size: 13px;
  }

  .updates {
    padding: 24px 16px;
  }

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

  .ranking {
    padding: 24px 16px;
  }

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

  .guide-entry {
    padding: 24px 16px;
  }

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

  .longtail-preview {
    padding: 24px 16px 32px;
  }

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

  .topic-card img {
    height: 160px;
  }

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

  .breadcrumb {
    margin-bottom: 16px;
    font-size: 13px;
  }

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

  .category-intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px;
  }

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

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

  .category-card-media img {
    height: 180px;
  }

  .category-tips {
    padding: 24px;
  }

  .guide-section {
    padding: 24px;
    margin-bottom: 32px;
  }

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

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

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

  .content-media img {
    height: 180px;
  }

  .recommend-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px;
  }

  .recommend-figure img {
    height: 200px;
  }

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

  .work-card {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px;
  }

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

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

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

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

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

  .error-section {
    padding: 32px 16px;
  }
}

/* ============================================================
   responsive — 平板 769px-1024px 中间断点
   ============================================================ */
@media (min-width: 769px) and (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 40px 24px 32px;
  }

  .hero-figure img {
    height: 260px;
  }

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

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

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

  .recommend-item {
    grid-template-columns: 160px 1fr;
    gap: 20px;
  }

  .work-card {
    grid-template-columns: 160px 1fr;
    gap: 20px;
  }

  .recommend-figure img,
  .work-media img {
    height: 200px;
  }
}

/* ============================================================
   responsive — 滚动出现动画增强（不阻塞初始可见）
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .category-card,
  .rank-item,
  .guide-card,
  .topic-card,
  .recommend-item,
  .work-card,
  .comparison-card,
  .analysis-item {
    animation: fade-in-up 0.4s ease both;
  }

  .category-card:nth-child(2),
  .rank-item:nth-child(2),
  .guide-card:nth-child(2),
  .topic-card:nth-child(2),
  .recommend-item:nth-child(2),
  .work-card:nth-child(2),
  .comparison-card:nth-child(2),
  .analysis-item:nth-child(2) {
    animation-delay: 0.05s;
  }

  .category-card:nth-child(3),
  .rank-item:nth-child(3),
  .guide-card:nth-child(3),
  .topic-card:nth-child(3),
  .recommend-item:nth-child(3),
  .work-card:nth-child(3),
  .comparison-card:nth-child(3),
  .analysis-item:nth-child(3) {
    animation-delay: 0.1s;
  }

  @keyframes fade-in-up {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}