/* ==========================================================
   1. BASE — 基础变量与全局重置
   ========================================================== */
:root {
  --color-bg: #ffffff;
  --color-surface: #f7f9f8;
  --color-text: #1f2933;
  --color-text-light: #5b6b7b;
  --color-primary: #0b7a75;
  --color-primary-dark: #095e5a;
  --color-accent: #e8853d;
  --color-border: #e2e8e6;
  --color-white: #ffffff;

  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, "Roboto Mono",
    "Liberation Mono", Menlo, monospace;

  --container-width: 1160px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-pill: 999px;
  --transition-fast: 0.2s ease;

  --color-city: #f2a08c;
  --color-ancient: #b79dd8;
  --color-workplace: #7fa8d9;
  --color-suspense: #5b6b7b;
  --color-family: #8fc2a5;
  --color-youth: #e58c9e;
  --color-dushi: #7fa8d9;
  --color-gufeng: #b79dd8;
  --color-xuanyi: #5b6b7b;
  --color-zhichang: #7fa8d9;
  --color-jiating: #8fc2a5;
  --color-qihuan: #e58c9e;
}

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

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

body {
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.35;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

/* 视觉隐藏但可访问 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

/* 全站统一内容容器 */
.header-inner,
.site-main > *:not(.status-strip),
.footer-inner,
.footer-bottom {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0;
}

.brand-name::first-letter {
  color: var(--color-primary);
}

/* 桌面导航按钮隐藏 */
.nav-toggle {
  display: none;
}

.site-nav {
  display: block;
}

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

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

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

.nav-list li a.is-current {
  color: var(--color-primary);
  background-color: #e6f2f1;
  font-weight: 700;
}

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

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-top: 48px;
  padding-bottom: 40px;
}

.footer-brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 10px;
}

.footer-brand::first-letter {
  color: var(--color-primary);
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 14px;
}

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

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

.footer-col ul li a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  padding-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 24px;
}

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

/* --- 内页通用 --- */
.inner-main {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  padding-top: 32px;
  padding-bottom: 56px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

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

.breadcrumb-sep {
  color: #b0bcc6;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 600;
}

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

.page-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 10px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 760px;
  line-height: 1.7;
}

/* 页面底部导航 */
.page-bottom-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0;
  margin-top: 32px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.page-bottom-nav p {
  font-size: 14px;
  color: var(--color-text-light);
}

.page-bottom-nav a {
  font-weight: 600;
  color: var(--color-primary);
}

/* 相关内容导航（底部） */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding: 20px 0 8px;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
}

.related-links-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
}

.related-links-item {
  font-size: 14px;
  color: var(--color-text-light);
  border-bottom: 1px solid transparent;
}

.related-links-item:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ==========================================================
   3. COMPONENTS — 全站共用组件
   ========================================================== */

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  min-width: 44px;
  transition: background-color var(--transition-fast),
    border-color var(--transition-fast), color var(--transition-fast);
}

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

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

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

.btn-secondary:hover {
  background-color: #e6f2f1;
}

/* 频道色点 */
.channel-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-gufeng {
  background-color: var(--color-gufeng);
}

.dot-dushi {
  background-color: var(--color-dushi);
}

.dot-xuanyi {
  background-color: var(--color-xuanyi);
}

.dot-zhichang {
  background-color: var(--color-zhichang);
}

.dot-jiating {
  background-color: var(--color-jiating);
}

.dot-qihuan {
  background-color: var(--color-qihuan);
}

/* 状态徽标 */
.status-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  flex-shrink: 0;
}

.status-new {
  background-color: #e6f2f1;
  color: var(--color-primary);
}

.status-updated {
  background-color: #fdf0e6;
  color: var(--color-accent);
}

.status-pending {
  background-color: #f3f5f7;
  color: var(--color-text-light);
}

.status-done {
  background-color: #e6f2f1;
  color: var(--color-primary);
}

.status-todo {
  background-color: #fdf0e6;
  color: var(--color-accent);
}

/* 频道标签 */
.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.channel-tags .tag,
.channel-tags li a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  border: 1px solid transparent;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.channel-tags .tag:hover,
.channel-tags li a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(15, 35, 45, 0.08);
}

.channel-tags .tag::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: baseline;
}

.tag-city {
  background-color: #fdf0eb;
  border-color: #f8d8ce;
}

.tag-city::before {
  background-color: var(--color-city);
}

.tag-ancient {
  background-color: #f0ecf7;
  border-color: #ddd0ee;
}

.tag-ancient::before {
  background-color: var(--color-ancient);
}

.tag-workplace {
  background-color: #eaf0f9;
  border-color: #cbd9ea;
}

.tag-workplace::before {
  background-color: var(--color-workplace);
}

.tag-suspense {
  background-color: #eef0f2;
  border-color: #d5dadd;
}

.tag-suspense::before {
  background-color: var(--color-suspense);
}

.tag-family {
  background-color: #e9f4ee;
  border-color: #cce5d6;
}

.tag-family::before {
  background-color: var(--color-family);
}

.tag-youth {
  background-color: #fcecf0;
  border-color: #f1cbd4;
}

.tag-youth::before {
  background-color: var(--color-youth);
}

/* 图片与 figure */
figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figure figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  padding-top: 8px;
  text-align: center;
}

/* ==========================================================
   4. PAGES — 首页 index.html
   ========================================================== */
.home-main {
  width: 100%;
}

/* 状态条 */
.status-strip {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.status-strip p {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 10px 24px;
  font-size: 13px;
  color: var(--color-text-light);
  text-align: center;
}

/* 首屏焦点区 */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  padding-top: 56px;
  padding-bottom: 56px;
}

.hero-content h1 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-figure {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface);
}

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

/* 新手入口区 */
.start-points {
  background-color: var(--color-surface);
  padding-top: 48px;
  padding-bottom: 48px;
}

.start-points h2,
.briefing-section h2,
.collection-teaser h2,
.channel-ribbon h2,
.pre-watch-strip h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 12px;
  text-align: center;
}

.start-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.start-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.start-card h3 {
  font-size: 18px;
  font-weight: 700;
}

.start-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  flex-grow: 1;
}

.start-card a {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
}

.start-card a::after {
  content: " →";
}

/* 频道标签带 */
.channel-ribbon {
  padding-top: 48px;
  padding-bottom: 48px;
}

.ribbon-desc,
.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 24px;
}

.channel-ribbon .channel-tags {
  justify-content: center;
  margin-top: 8px;
}

/* 双栏简报区 */
.briefing-section {
  background-color: var(--color-surface);
  padding-top: 48px;
  padding-bottom: 48px;
}

.briefing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 24px;
}

.briefing-col {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.briefing-col h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.update-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid #f0f2f1;
  font-size: 14px;
  line-height: 1.6;
}

.update-list li:last-child {
  border-bottom: none;
}

.update-list li span.status-badge {
  margin-top: 2px;
}

.ranking-list {
  counter-reset: rank;
}

.ranking-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid #f0f2f1;
  font-size: 14px;
}

.ranking-list li:last-child {
  border-bottom: none;
}

.ranking-list .rank-item {
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-primary);
  flex-shrink: 0;
}

.ranking-list .rank-reason {
  color: var(--color-text-light);
  line-height: 1.6;
}

.briefing-col > a {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
}

.briefing-col > a::after {
  content: " →";
}

/* 专题合辑预告 */
.collection-teaser {
  padding-top: 48px;
  padding-bottom: 48px;
}

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

.teaser-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-fast);
}

.teaser-card:hover {
  box-shadow: 0 6px 16px rgba(15, 35, 45, 0.08);
}

.teaser-card figure {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  width: 100%;
}

.teaser-card h3 {
  font-size: 17px;
  font-weight: 700;
  padding: 16px 20px 0;
}

.teaser-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  padding: 8px 20px 12px;
  flex-grow: 1;
}

.teaser-card a {
  font-size: 14px;
  font-weight: 600;
  padding: 0 20px 18px;
}

.teaser-card a::after {
  content: " →";
}

/* 观前窄带 */
.pre-watch-strip {
  background-color: #e6f2f1;
  padding-top: 40px;
  padding-bottom: 40px;
}

.pre-watch-strip h2 {
  color: var(--color-primary);
}

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

.prewatch-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.prewatch-item .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.prewatch-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

.pre-watch-strip .text-link {
  display: inline-block;
  margin-top: 20px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
}

.pre-watch-strip .text-link::after {
  content: " →";
}

/* ==========================================================
   5. PAGES — 内页共用布局（频道分类、排行等）
   ========================================================== */

/* 频道分类页双栏布局：侧栏在前，主内容在后 */
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

/* 左侧筛选栏 */
.channel-sidebar {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  position: sticky;
  top: 88px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 14px;
}

.channel-filter-list li {
  margin-bottom: 4px;
}

.channel-filter-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: background-color var(--transition-fast);
}

.channel-filter-item:hover {
  background-color: #eef2f1;
  color: var(--color-text);
}

.channel-filter-item.is-active {
  background-color: #e6f2f1;
  color: var(--color-primary);
  font-weight: 700;
}

.sidebar-note {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}

.sidebar-related {
  margin-top: 16px;
}

.sidebar-related-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.sidebar-related p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.sidebar-related a {
  font-weight: 600;
}

/* 频道分类右侧主内容 */
.channel-main {
  min-width: 0;
}

.channel-intro-block {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 28px;
}

.channel-intro-block h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.channel-intro-block p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 8px;
}

/* 频道分组 */
.channel-group {
  margin-bottom: 36px;
  scroll-margin-top: 88px;
}

.channel-group-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 12px;
}

.channel-group-title {
  font-size: 22px;
  font-weight: 700;
}

.channel-status {
  font-size: 12px;
  color: var(--color-text-light);
  background-color: var(--color-surface);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
}

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

/* 频道内容卡片列表 */
.channel-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.channel-item-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.channel-item-card:hover {
  box-shadow: 0 4px 12px rgba(15, 35, 45, 0.06);
}

.item-thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  width: 100%;
  border-bottom: 1px solid var(--color-border);
}

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

.item-info {
  padding: 14px 16px 16px;
}

.item-info h3 {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 6px;
}

.item-info p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.item-meta {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 8px;
  display: flex;
  gap: 12px;
}

/* 频道与合辑关联 */
.channel-collection-link {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-top: 8px;
}

.channel-collection-link h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.channel-collection-link p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 6px;
}

.channel-collection-link a {
  font-weight: 600;
}

/* ==========================================================
   6. PAGES — 分类排行 bangdan-paihang.html
   ========================================================== */

.ranking-method {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 36px;
}

.ranking-method h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
}

.content-media-inline {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin: 16px 0;
}

.content-media-inline img {
  width: 280px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.content-media-inline figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  text-align: left;
  align-self: center;
}

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

.method-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  padding: 4px 0;
}

.method-list li::before {
  content: "·";
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
}

.method-list strong {
  color: var(--color-text);
  font-weight: 600;
}

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

/* 排行列表 */
.ranking-list-section h2,
.status-summary h2,
.entry-guide h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
}

.ranking-list-section .section-desc,
.status-summary .section-desc,
.entry-guide > p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.rank-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.rank-item:first-of-type {
  border-top: 1px solid var(--color-border);
}

.rank-index {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  min-width: 48px;
  text-align: right;
}

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

.rank-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

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

.rank-link {
  font-size: 14px;
  font-weight: 600;
}

.rank-link::after {
  content: " →";
}

/* 更新状态摘要 */
.status-summary {
  margin-top: 36px;
}

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

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

.status-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-text-light);
  display: inline-block;
}

.status-card.status-active h3::before {
  background-color: var(--color-primary);
}

.status-card.status-pending h3::before {
  background-color: var(--color-accent);
}

.status-card.status-adjusted h3::before {
  background-color: var(--color-city);
}

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

/* 频道与合辑入口 */
.entry-guide {
  margin-top: 40px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
}

.entry-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.entry-link {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  flex: 1;
  min-width: 200px;
}

.entry-link strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.entry-link span {
  font-size: 13px;
  color: var(--color-text-light);
}

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

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

/* ==========================================================
   7. PAGES — 专题合辑 zhuanti-heji.html
   ========================================================== */

.collection-intro {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-bottom: 36px;
}

.collection-intro .section-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.intro-content p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 10px;
}

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

/* 合辑卡片区 */
.collection-cards .section-title,
.collection-rules .section-title,
.channel-cross .section-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}

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

.collection-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-fast);
}

.collection-card:hover {
  box-shadow: 0 6px 16px rgba(15, 35, 45, 0.08);
}

.card-figure {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  width: 100%;
}

.card-body {
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.card-scene {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.card-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.card-channels {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: auto;
  padding-top: 8px;
}

.card-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  margin-right: 6px;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
}

.card-link::after {
  content: " →";
}

/* 合辑组成规则 */
.collection-rules {
  margin-top: 40px;
}

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

.rule-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px;
}

.rule-item .rule-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.rule-item .rule-desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 频道交叉入口 */
.channel-cross {
  margin-top: 40px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
}

.cross-intro {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.channel-cross .channel-tags {
  margin-bottom: 20px;
}

.channel-cross .channel-tags li a {
  background-color: var(--color-white);
}

.cross-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.cross-links p {
  font-size: 14px;
}

.cross-links a {
  font-weight: 600;
}

/* ==========================================================
   8. PAGES — 更新记录 gengxin-rizhi.html
   ========================================================== */

.batch-note-section {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 36px;
}

.section-heading h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

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

.batch-figure {
  margin-top: 16px;
}

.batch-figure img {
  max-height: 260px;
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 时间线 */
.timeline-section {
  margin-bottom: 40px;
}

.timeline-list {
  position: relative;
}

.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.timeline-item:first-child {
  padding-top: 8px;
}

.batch-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.batch-tag {
  display: inline-block;
  background-color: #e6f2f1;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}

.batch-status {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.batch-detail h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.batch-detail > p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
}

.change-list li {
  font-size: 14px;
  line-height: 1.7;
  padding: 4px 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.change-list li::before {
  content: "—";
  color: var(--color-primary);
  flex-shrink: 0;
}

/* 待核对清单 */
.pending-section {
  background-color: #fdf6f0;
  border: 1px solid #f0dcc8;
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 36px;
}

.pending-section .section-intro {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
  text-align: left;
}

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

.pending-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  background-color: var(--color-white);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}

.pending-channel {
  font-weight: 700;
  color: var(--color-text);
  min-width: 72px;
}

.pending-desc {
  color: var(--color-text-light);
  flex-grow: 1;
}

.pending-status {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background-color: #fdf0e6;
  color: var(--color-accent);
  font-weight: 600;
}

/* 更早记录 */
.earlier-section {
  margin-bottom: 8px;
}

.earlier-section > p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.earlier-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.earlier-links a {
  font-size: 14px;
  font-weight: 600;
}

.earlier-links a::after {
  content: " →";
}

/* ==========================================================
   9. PAGES — 观前指南 guanqian-zhinan.html
   ========================================================== */

/* 步骤进度条 */
.step-progress {
  margin-bottom: 28px;
}

.progress-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.progress-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 12px;
  font-size: 14px;
  color: var(--color-text-light);
  border-right: 1px solid var(--color-border);
  position: relative;
}

.progress-item:last-child {
  border-right: none;
}

.progress-item.is-current {
  background-color: #e6f2f1;
  color: var(--color-primary);
  font-weight: 700;
}

.progress-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: #d5ddda;
  color: var(--color-text-light);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.progress-item.is-current .progress-num {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* 引导图 */
.guide-figure {
  margin-bottom: 28px;
}

.guide-figure img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 步骤正文 */
.guide-steps {
  margin-bottom: 40px;
}

.guide-steps > h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 20px;
}

.guide-step-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 16px;
}

.step-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  background-color: #e6f2f1;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}

.step-card-head h3 {
  font-size: 19px;
  font-weight: 700;
}

.step-card-body p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 8px;
}

.step-card-body p.step-check {
  font-size: 14px;
  color: var(--color-text);
  background-color: var(--color-surface);
  border-left: 3px solid var(--color-primary);
  padding: 10px 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 12px 0;
}

.step-card-body .step-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
}

.step-card-body .step-link::after {
  content: " →";
}

/* 异常处理 */
.exception-guide {
  margin-bottom: 40px;
}

.exception-guide > h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 20px;
}

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

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

.exception-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.exception-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 10px;
}

.exception-card a {
  font-size: 14px;
  font-weight: 600;
}

.exception-card a::after {
  content: " →";
}

/* 适用边界 */
.guide-scope {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
}

.guide-scope > h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}

.scope-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.scope-col h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.scope-col ul li {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  padding: 4px 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.scope-col ul li::before {
  content: "·";
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* 站内相关栏目 */
.related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

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

.related-links ul li a:hover {
  color: var(--color-primary);
}

/* ==========================================================
   10. PAGES — 边界与问答 shuoming-fankui.html
   ========================================================== */

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

.faq-section > h2,
.boundary-section > h2,
.solution-path-section > h2,
.feedback-note > h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}

.faq-section .section-desc,
.boundary-section .section-desc,
.solution-path-section .section-desc {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

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

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

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

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

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

/* 边界图 */
.boundary-figure {
  margin: 16px 0 20px;
}

.boundary-figure img {
  width: 100%;
  max-height: 280px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* 边界双栏 */
.boundary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.boundary-col {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
}

.boundary-col h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.boundary-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  line-height: 1.7;
  padding: 6px 0;
  color: var(--color-text-light);
}

.boundary-list.included li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.boundary-list.excluded li::before {
  content: "×";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* 解决路径 */
.solution-path-section {
  margin-top: 40px;
}

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

.solution-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.solution-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

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

.solution-item a {
  font-weight: 600;
}

.solution-item a::after {
  content: " →";
}

/* 反馈说明 */
.feedback-note {
  margin-top: 36px;
  background-color: #e6f2f1;
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.feedback-note p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
}

.feedback-note a {
  font-weight: 700;
}

/* ==========================================================
   11. PAGES — 404 页面
   ========================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-grow: 1;
  padding: 80px 24px;
}

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

.error-code {
  font-family: var(--font-mono);
  font-size: 72px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 12px;
}

.error-wrap h1 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.error-advice {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 28px;
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--color-primary);
  min-width: 44px;
}

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

/* ==========================================================
   12. RESPONSIVE — 响应式断点
   ========================================================== */

/* 平板：≤1024px */
@media (max-width: 1024px) {
  .hero-section {
    gap: 32px;
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .hero-content h1 {
    font-size: 30px;
  }

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

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

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

  .status-card {
    padding: 16px;
  }

  .content-media-inline {
    flex-direction: column;
  }

  .content-media-inline img {
    width: 100%;
    max-height: 220px;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 200px 1fr;
    gap: 20px;
  }
}

/* 手机：≤768px */
@media (max-width: 768px) {
  /* 页头 */
  .header-inner {
    min-height: 56px;
    flex-wrap: wrap;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  /* 汉堡按钮显示 */
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 8px;
    border-radius: var(--radius-sm);
    background-color: transparent;
    align-items: center;
    order: 2;
  }

  .nav-toggle-bar {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 1px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .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);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    display: none;
    padding: 8px 0 4px;
  }

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

  .nav-list li a {
    padding: 12px 10px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  /* 首页 */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 32px;
    padding-bottom: 32px;
  }

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

  .hero-figure {
    aspect-ratio: 16 / 10;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .start-cards,
  .teaser-cards {
    grid-template-columns: 1fr;
  }

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

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

  .channel-ribbon .channel-tags {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .channel-ribbon .channel-tags .tag {
    flex-shrink: 0;
  }

  /* 内页 */
  .inner-main {
    padding-top: 24px;
    padding-bottom: 40px;
  }

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

  /* 频道分类页：移动端主内容在前 */
  .layout-shell.sidebar-left {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .channel-sidebar {
    order: 2;
    position: static;
    margin-top: 24px;
  }

  .channel-main {
    order: 1;
    width: 100%;
  }

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

  .channel-item-card {
    display: flex;
    align-items: center;
  }

  .channel-item-card .item-thumb {
    width: 120px;
    aspect-ratio: 4 / 3;
    flex-shrink: 0;
    border-bottom: none;
    border-right: 1px solid var(--color-border);
  }

  .channel-item-card .item-info {
    flex-grow: 1;
    padding: 12px 14px;
  }

  /* 排行 */
  .status-grid {
    grid-template-columns: 1fr;
  }

  .rank-item {
    flex-direction: column;
    gap: 8px;
  }

  .rank-index {
    text-align: left;
    font-size: 20px;
  }

  /* 专题合辑 */
  .cards-grid {
    grid-template-columns: 1fr;
  }

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

  .channel-cross .channel-tags {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  /* 更新记录 */
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .batch-meta {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }

  /* 观前指南 */
  .progress-list {
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }

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

  .progress-item:nth-child(2n) {
    border-right: none;
  }

  .progress-item:nth-child(n + 3) {
    border-bottom: none;
  }

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

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

  /* 边界与问答 */
  .boundary-grid {
    grid-template-columns: 1fr;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 15px;
  }

  .faq-item > p {
    padding: 0 16px 14px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 36px;
    padding-bottom: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }
}

/* 小屏手机：≤480px */
@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 24px;
  }

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

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

  .channel-item-card {
    flex-direction: column;
    align-items: stretch;
  }

  .channel-item-card .item-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

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

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

  .entry-links {
    flex-direction: column;
    gap: 10px;
  }

  .entry-link {
    min-width: 100%;
  }

  .guide-step-card {
    padding: 18px 16px;
  }

  .step-card-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

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