/* ============================================================
   皮皮漫画 sdtyhy.com — 全站样式表
   视觉方向：实验排版风漫画资料库
   ============================================================ */

/* ============================================================
   1. Base — 基础变量、重置与全局字体
   ============================================================ */

:root {
  --color-bg: #F8F6F2;
  --color-surface: #FFFFFF;
  --color-paper: #FDFCF9;
  --color-brand: #F25C35;
  --color-brand-dark: #D94A26;
  --color-text: #2B2B2B;
  --color-text-soft: #5C5A56;
  --color-teal: #2A9D8F;
  --color-teal-dark: #21867A;
  --color-yellow: #E9C46A;
  --color-line: #E8E4DD;
  --color-line-dark: #D8D3CA;

  --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;

  --container-width: 1200px;
  --content-max: 720px;
  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(43, 43, 43, 0.08);
  --shadow-md: 0 4px 12px rgba(43, 43, 43, 0.08);
  --shadow-lg: 0 8px 24px rgba(43, 43, 43, 0.12);
  --transition: 0.2s ease;

  --font-size-base: 16px;
  --line-height-base: 1.8;
}

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

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-brand-dark);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-text);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   2. Layout — 全站骨架：页头、主容器、页脚
   ============================================================ */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
}

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  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;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
  color: var(--color-text);
}

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

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-brand);
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-soft);
  border: 1px solid var(--color-line-dark);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  line-height: 1.5;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
}

.nav-toggle:hover {
  background-color: var(--color-bg);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

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

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

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

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.nav-list li a:hover {
  color: var(--color-brand);
  background-color: var(--color-bg);
}

.nav-list li a.is-current {
  color: var(--color-brand);
  background-color: rgba(242, 92, 53, 0.08);
  font-weight: 600;
}

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

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

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

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

.footer-links li a {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.6;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.7;
  max-width: var(--container-width);
  margin: 0 auto;
}

/* ============================================================
   3. Components — 通用组件：面包屑、标题区、标签、卡片等
   ============================================================ */

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-soft);
}

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

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

.breadcrumb-sep {
  color: var(--color-line-dark);
  font-size: 13px;
}

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

/* 页面标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-soft);
  max-width: var(--content-max);
  line-height: 1.8;
}

/* 区块标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.7;
  max-width: var(--content-max);
}

.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-brand);
  margin-top: 16px;
  padding: 6px 0;
  border-bottom: 2px solid rgba(242, 92, 53, 0.3);
}

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

/* 通用标签 */
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  line-height: 1.6;
  background-color: rgba(42, 157, 143, 0.1);
  color: var(--color-teal-dark);
}

.tag-hot {
  background-color: rgba(242, 92, 53, 0.12);
  color: var(--color-brand-dark);
}

.tag-adventure {
  background-color: rgba(42, 157, 143, 0.12);
  color: var(--color-teal-dark);
}

.tag-romance {
  background-color: rgba(233, 196, 106, 0.25);
  color: #A07818;
}

.tag-mystery {
  background-color: rgba(90, 80, 160, 0.12);
  color: #5A50A0;
}

.tag-comedy {
  background-color: rgba(233, 196, 106, 0.25);
  color: #A07818;
}

.tag-heal {
  background-color: rgba(42, 157, 143, 0.12);
  color: var(--color-teal-dark);
}

.tag-sci {
  background-color: rgba(70, 120, 200, 0.12);
  color: #3A68A0;
}

.tag-slice {
  background-color: rgba(200, 120, 80, 0.12);
  color: #A06030;
}

.tag-fantasy {
  background-color: rgba(140, 90, 170, 0.12);
  color: #7A4A90;
}

.tag-school {
  background-color: rgba(90, 160, 180, 0.12);
  color: #3A7890;
}

.tag-sports {
  background-color: rgba(60, 160, 90, 0.14);
  color: #2A8048;
}

.tag-food {
  background-color: rgba(220, 130, 60, 0.14);
  color: #A06020;
}

.tag-history {
  background-color: rgba(150, 110, 70, 0.14);
  color: #806040;
}

.tag-thriller {
  background-color: rgba(80, 60, 60, 0.14);
  color: #504040;
}

.tag-legend {
  background-color: rgba(180, 140, 60, 0.14);
  color: #907030;
}

.tag-youth {
  background-color: rgba(220, 120, 140, 0.14);
  color: #A05060;
}

.tag-life {
  background-color: rgba(100, 140, 100, 0.14);
  color: #507050;
}

.tag-warm {
  background-color: rgba(220, 160, 90, 0.16);
  color: #906020;
}

.tag-suspense {
  background-color: rgba(90, 80, 110, 0.14);
  color: #504060;
}

.tag-horror {
  background-color: rgba(100, 60, 60, 0.14);
  color: #603838;
}

.tag-relax {
  background-color: rgba(90, 170, 150, 0.14);
  color: #2A7A68;
}

.tag-competition {
  background-color: rgba(200, 90, 60, 0.14);
  color: #A04028;
}

.tag-future {
  background-color: rgba(70, 100, 160, 0.14);
  color: #384878;
}

.tag-world {
  background-color: rgba(60, 130, 170, 0.14);
  color: #206080;
}

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.related-links h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}

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

.related-links ul li a {
  display: inline-block;
  padding: 8px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

.related-links ul li a:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   4. Pages — 首页
   ============================================================ */

.home-main {
  width: 100%;
}

/* --- Hero 首屏 --- */
.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 48px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 16px;
  position: relative;
}

.hero-title::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  background-color: var(--color-brand);
  margin-top: 16px;
  border-radius: 2px;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-text-soft);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: 24px;
}

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

.hero-btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line-dark);
  color: var(--color-text);
  transition: all var(--transition);
}

.hero-btn:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  box-shadow: var(--shadow-sm);
}

.hero-btn.primary {
  background-color: var(--color-brand);
  border-color: var(--color-brand);
  color: #FFFFFF;
}

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

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

.hero-figure img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

/* --- 通用区块 --- */
.section-block {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--color-line);
}

/* --- 题材分类墙 --- */
.category-wall .tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.tag-item {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

.tag-item:hover {
  border-color: var(--color-teal);
  color: var(--color-teal-dark);
  background-color: rgba(42, 157, 143, 0.06);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* --- 最近更新条 --- */
.update-strip {
  margin-top: 24px;
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  overflow: hidden;
}

.update-item {
  display: grid;
  grid-template-columns: 80px 90px 1fr;
  gap: 16px;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-line);
  transition: background-color var(--transition);
}

.update-item:last-child {
  border-bottom: 0;
}

.update-item:hover {
  background-color: var(--color-paper);
}

.update-time {
  font-size: 13px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
}

.update-type {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  background-color: rgba(42, 157, 143, 0.1);
  color: var(--color-teal-dark);
  border-radius: var(--radius-sm);
  text-align: center;
  width: fit-content;
}

.update-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
}

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

/* --- 书架预览 + 人气榜双栏 --- */
.preview-ranking {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.cover-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.cover-card {
  display: block;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  overflow: hidden;
  transition: all var(--transition);
}

.cover-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-line-dark);
}

.cover-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.cover-card .cover-tag {
  display: block;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 12px 4px;
  color: var(--color-text);
  line-height: 1.5;
}

.cover-card .cover-status {
  display: block;
  font-size: 12px;
  color: var(--color-text-soft);
  padding: 0 12px 10px;
  line-height: 1.5;
}

/* 人气榜 */
.ranking-column {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  padding: 24px;
}

.ranking-list {
  margin-top: 16px;
}

.ranking-item {
  display: grid;
  grid-template-columns: 32px 48px 1fr;
  gap: 12px;
  align-items: center;
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition);
}

.ranking-item:hover {
  background-color: var(--color-paper);
}

.ranking-num {
  font-size: 20px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-line-dark);
  text-align: center;
}

.ranking-item:nth-child(1) .ranking-num {
  color: var(--color-brand);
}

.ranking-item:nth-child(2) .ranking-num {
  color: var(--color-brand);
  opacity: 0.7;
}

.ranking-item:nth-child(3) .ranking-num {
  color: var(--color-brand);
  opacity: 0.5;
}

.ranking-item img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

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

.ranking-name {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.ranking-bar {
  display: block;
  height: 4px;
  background-color: var(--color-line);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.ranking-bar::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background-color: var(--color-teal);
  border-radius: 2px;
}

.bar-high::after {
  width: 90%;
}

.bar-mid::after {
  width: 70%;
}

.bar-normal::after {
  width: 55%;
}

.bar-low::after {
  width: 40%;
}

.bar-lowest::after {
  width: 25%;
}

/* --- 新读者三步指南 --- */
.steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.step-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
}

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

.step-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-brand);
  background-color: rgba(242, 92, 53, 0.1);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.step-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-text {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

/* --- 专题合集预览 --- */
.topic-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.topic-card {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-line-dark);
}

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

.topic-card .topic-name {
  font-size: 17px;
  font-weight: 600;
  padding: 16px 16px 4px;
  color: var(--color-text);
}

.topic-card .topic-desc {
  font-size: 14px;
  color: var(--color-text-soft);
  padding: 0 16px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.topic-card .topic-status {
  display: inline-block;
  font-size: 12px;
  color: var(--color-teal-dark);
  background-color: rgba(42, 157, 143, 0.1);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  margin: 12px 16px 16px;
}

/* --- 版权与反馈入口 --- */
.about-entry {
  text-align: left;
}

.about-entry .section-desc {
  max-width: var(--content-max);
  margin-bottom: 8px;
}

/* ============================================================
   5. Pages — 内页通用
   ============================================================ */

.inner-main {
  width: 100%;
  padding-bottom: 48px;
}

/* ============================================================
   6. Pages — 书架页 bookcase
   ============================================================ */

.bookcase-summary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
}

.bookcase-summary p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  max-width: var(--content-max);
  margin-bottom: 8px;
}

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

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

.comic-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.comic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-line-dark);
}

.comic-cover {
  overflow: hidden;
}

.comic-cover img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.comic-info {
  padding: 16px;
}

.comic-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.5;
}

.comic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.comic-status {
  font-size: 13px;
  color: var(--color-text-soft);
  margin-bottom: 8px;
  line-height: 1.5;
}

.comic-desc {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.archive-note {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 0;
}

.archive-note p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  max-width: var(--content-max);
  margin-bottom: 8px;
}

/* ============================================================
   7. Pages — 题材分类页 category
   ============================================================ */

.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: start;
}

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

.tag-sidebar {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
  position: sticky;
  top: calc(var(--header-height) + 16px);
}

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

.tag-index-list li {
  margin-bottom: 4px;
}

.tag-index-list li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  line-height: 1.5;
  transition: all var(--transition);
}

.tag-index-list li a:hover {
  background-color: var(--color-bg);
  color: var(--color-brand);
}

.tag-index-list li a.is-current {
  background-color: rgba(242, 92, 53, 0.08);
  color: var(--color-brand);
  font-weight: 600;
}

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

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

.category-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-line);
  position: relative;
}

.category-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background-color: var(--color-brand);
  border-radius: 2px;
  margin-right: 10px;
  vertical-align: -2px;
}

.category-desc {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.work-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.work-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-line-dark);
}

.work-cover {
  overflow: hidden;
}

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

.work-card .work-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  padding: 12px 14px 4px;
  line-height: 1.5;
}

.work-card .work-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--color-teal-dark);
  background-color: rgba(42, 157, 143, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin: 0 14px;
  line-height: 1.6;
}

.work-card .work-status {
  display: block;
  font-size: 12px;
  color: var(--color-text-soft);
  padding: 6px 14px 12px;
  line-height: 1.5;
}

.category-note {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 8px;
}

.category-note-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.category-note p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 6px;
}

.related-link-group {
  margin-top: 12px;
}

/* ============================================================
   8. Pages — 人气榜 ranking
   ============================================================ */

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

.ranking-list {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.ranking-item {
  display: grid;
  grid-template-columns: 48px 72px 1fr;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-line);
  transition: background-color var(--transition);
}

.ranking-item:last-child {
  border-bottom: 0;
}

.ranking-item:hover {
  background-color: var(--color-paper);
}

.ranking-num {
  font-size: 28px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--color-line-dark);
  text-align: center;
}

.ranking-item:nth-child(1) .ranking-num {
  color: var(--color-brand);
}

.ranking-item:nth-child(2) .ranking-num {
  color: var(--color-brand);
  opacity: 0.7;
}

.ranking-item:nth-child(3) .ranking-num {
  color: var(--color-brand);
  opacity: 0.5;
}

.ranking-cover {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.ranking-cover img {
  width: 72px;
  height: 72px;
  object-fit: cover;
}

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

.ranking-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
  line-height: 1.5;
}

.ranking-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.ranking-heat {
  display: flex;
  align-items: center;
  gap: 12px;
}

.heat-bar {
  flex: 1;
  height: 6px;
  background-color: var(--color-line);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
  max-width: 280px;
}

.heat-bar::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background-color: var(--color-teal);
  border-radius: 3px;
}

.ranking-item:nth-child(1) .heat-bar::after {
  width: 95%;
}

.ranking-item:nth-child(2) .heat-bar::after {
  width: 85%;
}

.ranking-item:nth-child(3) .heat-bar::after {
  width: 75%;
}

.ranking-item:nth-child(4) .heat-bar::after {
  width: 65%;
}

.ranking-item:nth-child(5) .heat-bar::after {
  width: 58%;
}

.ranking-item:nth-child(6) .heat-bar::after {
  width: 50%;
}

.ranking-item:nth-child(7) .heat-bar::after {
  width: 42%;
}

.ranking-item:nth-child(8) .heat-bar::after {
  width: 35%;
}

.heat-text {
  font-size: 13px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.ranking-method {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 0;
}

.ranking-method h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.ranking-method p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  max-width: var(--content-max);
  margin-bottom: 8px;
}

/* ============================================================
   9. Pages — 更新日志 updates
   ============================================================ */

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

.section-heading {
  margin-bottom: 20px;
}

.section-heading h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}

.section-note {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.timeline-list {
  border-left: 2px solid var(--color-line);
  margin-left: 8px;
  padding-left: 24px;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
  padding-bottom: 24px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-brand);
  border: 2px solid var(--color-surface);
}

.timeline-marker {
  padding-top: 2px;
}

.timeline-time {
  display: block;
  font-size: 13px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.timeline-type {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  background-color: rgba(42, 157, 143, 0.1);
  color: var(--color-teal-dark);
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

.timeline-content {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: all var(--transition);
}

.timeline-content:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-line-dark);
}

.timeline-thumb {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.timeline-thumb img {
  width: 72px;
  height: 72px;
  object-fit: cover;
}

.timeline-body {
  min-width: 0;
}

.timeline-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
  line-height: 1.5;
}

.timeline-desc {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: 6px;
}

.timeline-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-teal-dark);
}

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

.updates-rule-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

.rule-block h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.rule-content p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 8px;
}

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

.rule-note h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.rule-note p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

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

.related-card {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition);
}

.related-card:hover {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

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

.related-desc {
  display: block;
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.6;
}

/* ============================================================
   10. Pages — 阅读指南 guide
   ============================================================ */

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

.guide-section h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.content-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
}

.content-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-text-soft);
  padding: 8px 12px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 0;
  line-height: 1.6;
}

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

.steps-overview .step-card {
  padding: 24px;
}

.steps-overview .step-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.steps-overview .step-card p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.step-detail {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 16px;
}

.step-detail h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.step-detail dl {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 8px 16px;
}

.step-detail dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  padding-top: 4px;
}

.step-detail dd {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  padding-bottom: 8px;
}

.step-detail dd a {
  font-weight: 500;
}

.faq-section {
  padding-bottom: 24px;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color var(--transition);
}

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

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

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

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

.faq-item p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.8;
  padding: 0 20px 16px;
}

/* ============================================================
   11. Pages — 专题合集 topic
   ============================================================ */

.topic-summary,
.topic-scope,
.topic-method,
.topic-progress,
.topic-works {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
}

.summary-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
  margin-top: 16px;
}

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

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

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

.scope-block {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 16px;
}

.scope-block > p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 12px;
}

.scope-list {
  margin: 12px 0;
  padding-left: 4px;
}

.scope-list li {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.8;
  padding: 6px 0 6px 20px;
  position: relative;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-teal);
}

.method-block {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 16px;
}

.method-block > p {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 12px;
}

.method-steps {
  margin: 16px 0;
}

.method-steps li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
}

.method-steps li:last-child {
  border-bottom: 0;
}

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

.method-steps li p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.progress-timeline {
  border-left: 2px solid var(--color-line);
  margin: 16px 0 0 8px;
  padding-left: 24px;
}

.progress-item {
  position: relative;
  padding-bottom: 20px;
}

.progress-item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-yellow);
  border: 2px solid var(--color-surface);
}

.progress-content h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.progress-content p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.works-note {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-top: 8px;
}

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

.work-card-list .work-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.work-card-list .work-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-line-dark);
}

.work-card-list .work-cover {
  overflow: hidden;
}

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

.work-info {
  padding: 14px;
}

.work-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.5;
}

.work-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--color-teal-dark);
  background-color: rgba(42, 157, 143, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  line-height: 1.6;
}

.work-desc {
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.related-list li a {
  display: inline-block;
  padding: 8px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

.related-list li a:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   12. Pages — 版权与反馈 about
   ============================================================ */

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

.about-section .section-heading {
  margin-bottom: 16px;
}

.about-section .section-heading h2 {
  font-size: 24px;
  font-weight: 700;
}

.position-content {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  align-items: start;
}

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

.position-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

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

.boundary-lead {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: var(--content-max);
}

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

.boundary-list li {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
}

.boundary-list li h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.boundary-list li p {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.feedback-content {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

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

.feedback-steps {
  margin: 12px 0;
}

.feedback-steps li {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.8;
  padding: 6px 0;
  position: relative;
  padding-left: 24px;
}

.feedback-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-brand);
}

.feedback-steps li a {
  font-weight: 500;
}

.archive-lead {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: var(--content-max);
}

.archive-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.archive-link {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition);
}

.archive-link:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

/* ============================================================
   13. Pages — 404 错误页
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

.error-panel {
  text-align: center;
  max-width: 480px;
  padding: 48px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.error-code {
  font-size: 64px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--color-brand);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 24px;
}

.error-back {
  display: inline-block;
  padding: 10px 28px;
  background-color: var(--color-brand);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
}

.error-back:hover {
  background-color: var(--color-brand-dark);
  color: #FFFFFF;
}

/* ============================================================
   14. Responsive — 响应式断点
   ============================================================ */

/* --- 平板：1024px --- */
@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr 0.7fr;
    gap: 32px;
  }

  .hero-title {
    font-size: 34px;
  }

  .preview-ranking {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .ranking-column {
    max-width: 100%;
  }

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

  .page-layout {
    grid-template-columns: 180px 1fr;
    gap: 24px;
  }

  .updates-rule-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .summary-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .position-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

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

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    box-shadow: var(--shadow-md);
    gap: 0;
  }

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

  .nav-list li a {
    padding: 12px 8px;
    border-radius: var(--radius-sm);
  }

  .hero-section {
    grid-template-columns: 1fr;
    padding: 40px 16px 32px;
    gap: 24px;
  }

  .hero-title {
    font-size: 30px;
  }

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

  .section-block {
    padding: 36px 16px;
  }

  .update-item {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 16px;
  }

  .update-time {
    font-size: 12px;
  }

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

  .cover-card img {
    height: 120px;
  }

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

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

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

  .footer-bottom {
    padding: 16px;
  }

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

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

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

  .page-description {
    font-size: 15px;
  }

  .bookcase-summary,
  .bookcase-grid-section,
  .archive-note {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .tag-sidebar {
    position: static;
    order: 2;
  }

  .category-main {
    order: 1;
  }

  .category-card-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .ranking-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .ranking-item {
    grid-template-columns: 36px 56px 1fr;
    gap: 12px;
    padding: 12px;
  }

  .ranking-num {
    font-size: 22px;
  }

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

  .ranking-heat {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .heat-bar {
    max-width: 100%;
    width: 100%;
  }

  .ranking-method {
    padding-left: 16px;
    padding-right: 16px;
  }

  .updates-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .timeline-list {
    margin-left: 4px;
    padding-left: 16px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .timeline-item::before {
    left: -21px;
  }

  .timeline-content {
    grid-template-columns: 56px 1fr;
    gap: 12px;
    padding: 12px;
  }

  .timeline-thumb img {
    width: 56px;
    height: 56px;
  }

  .updates-rule-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .guide-section {
    padding-left: 16px;
    padding-right: 16px;
  }

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

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

  .step-detail dl {
    grid-template-columns: 1fr;
    gap: 2px 0;
  }

  .step-detail dt {
    padding-top: 8px;
  }

  .topic-summary,
  .topic-scope,
  .topic-method,
  .topic-progress,
  .topic-works {
    padding-left: 16px;
    padding-right: 16px;
  }

  .summary-figure img {
    height: 180px;
  }

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

  .about-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .position-figure img {
    height: 180px;
  }

  .boundary-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .archive-links {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

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

  .error-code {
    font-size: 48px;
  }

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

/* --- 小屏手机：390px --- */
@media (max-width: 390px) {
  .brand-tag {
    display: none;
  }

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

  .hero-actions {
    flex-direction: column;
    gap: 8px;
  }

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

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

  .ranking-item {
    grid-template-columns: 28px 48px 1fr;
    gap: 10px;
    padding: 10px;
  }

  .ranking-cover img {
    width: 48px;
    height: 48px;
  }

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

  .timeline-thumb {
    width: 56px;
  }

  .timeline-thumb img {
    width: 56px;
    height: 56px;
  }
}