/* ==========================================================================
   base — 基础变量、重置、全局排版
   ========================================================================== */

:root {
  --color-deep: #111827;
  --color-deep-soft: #1f2937;
  --color-primary: #20B2AA;
  --color-primary-dark: #178f89;
  --color-accent: #F59E0B;
  --color-text: #1f2937;
  --color-text-light: #6B7280;
  --color-border: #e5e7eb;
  --color-bg-soft: #F9FAFB;
  --color-white: #FFFFFF;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --container-padding: 24px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-base: 0.2s ease;
  --shadow-card: 0 1px 3px rgba(17, 24, 39, 0.08);
  --shadow-hover: 0 4px 12px rgba(17, 24, 39, 0.1);
}

*,
*::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: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-white);
}

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

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

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

h4 {
  font-size: 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
}

summary {
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
}

details[open] {
  border-color: var(--color-primary);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.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;
}

/* ==========================================================================
   layout — 全站外壳、页头、页脚、容器、面包屑、页标题
   ========================================================================== */

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

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

/* 页头 */
.site-header {
  background-color: var(--color-deep);
  position: relative;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: 700;
  flex-shrink: 0;
}

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

.brand-name {
  letter-spacing: 0.02em;
}

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

.site-nav .nav-list a {
  display: inline-block;
  padding: 8px 14px;
  color: #d1d5db;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base), background-color var(--transition-base);
}

.site-nav .nav-list a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.06);
}

.site-nav .nav-list a.is-current {
  color: var(--color-white);
  border-bottom-color: var(--color-primary);
  background-color: rgba(255, 255, 255, 0.04);
}

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

.nav-toggle:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.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);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px var(--container-padding) 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

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

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

.breadcrumb-sep {
  color: #d1d5db;
}

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

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

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.page-description {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text-light);
  max-width: 780px;
}

/* 内页主容器 */
.inner-main {
  padding-bottom: 64px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-deep);
  color: #d1d5db;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.footer-brand-name {
  color: var(--color-white);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.9375rem;
  color: #9ca3af;
  margin-bottom: 12px;
  line-height: 1.6;
}

.footer-boundary {
  font-size: 0.875rem;
  color: #9ca3af;
  line-height: 1.6;
}

.footer-nav-title {
  color: var(--color-white);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.footer-nav ul,
.footer-support ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a,
.footer-support a {
  color: #9ca3af;
  font-size: 0.9375rem;
}

.footer-nav a:hover,
.footer-support a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px var(--container-padding);
  text-align: center;
  font-size: 0.8125rem;
  color: #6b7280;
}

.footer-bottom p {
  max-width: var(--container-width);
  margin: 0 auto;
}

/* ==========================================================================
   components — 通用组件
   ========================================================================== */

/* section 标题区 */
.section-heading {
  max-width: var(--container-width);
  margin: 0 auto 32px;
  padding: 0 var(--container-padding);
}

.section-heading h2 {
  font-size: 1.75rem;
  margin-bottom: 10px;
}

.section-heading p {
  color: var(--color-text-light);
  font-size: 1rem;
  max-width: 720px;
}

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

.channel-dot-urban {
  background-color: #2563eb;
}

.channel-dot-costume {
  background-color: #7c3aed;
}

.channel-dot-suspense {
  background-color: #dc2626;
}

.channel-dot-sweet {
  background-color: #db2777;
}

.channel-dot-family {
  background-color: #059669;
}

.channel-dot-counter {
  background-color: #d97706;
}

.channel-dot-romance {
  background-color: #db2777;
}

.channel-dot-fantasy {
  background-color: #7c3aed;
}

.channel-dot-thriller {
  background-color: #475569;
}

.channel-dot-comedy {
  background-color: #ea580c;
}

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px var(--container-padding);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.9375rem;
}

.related-links-label {
  color: var(--color-text-light);
  font-weight: 500;
}

.related-links-item {
  color: var(--color-primary-dark);
  border-bottom: 1px solid transparent;
}

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

/* ==========================================================================
   pages — index 首页
   ========================================================================== */

/* hero 首屏 */
.home-hero {
  background-color: var(--color-deep);
  color: var(--color-white);
}

.timeline-hero {
  padding: 56px 0 0;
}

.hero-copy {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.hero-copy h1 {
  color: var(--color-white);
  font-size: 2.25rem;
  line-height: 1.3;
  max-width: 640px;
  margin-bottom: 16px;
}

.hero-lead {
  color: #d1d5db;
  font-size: 1.125rem;
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 24px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.hero-cta:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

/* hero 焦点图 */
.hero-figure {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 0;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* hero 时间线 */
.hero-timeline {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px var(--container-padding) 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: step;
}

.timeline-step {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
}

.timeline-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.timeline-step .step-title {
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-step .step-text {
  color: #9ca3af;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

.timeline-step a {
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 500;
}

.timeline-step a:hover {
  color: #5eead4;
}

/* 首页内容媒体图 */
.content-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.content-media-primary {
  padding-bottom: 24px;
}

.content-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.content-media figcaption,
.hero-figure figcaption {
  color: #9ca3af;
  font-size: 0.8125rem;
  padding: 8px 0 0;
  text-align: center;
}

/* 频道色标带 */
.channel-strip-section {
  padding: 56px 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.channel-strip {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.channel-item {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

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

.channel-item .channel-dot {
  width: 12px;
  height: 12px;
}

.channel-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.channel-tags {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  line-height: 1.5;
}

/* 主题目录 */
.topic-directory {
  padding: 56px 0;
  background-color: var(--color-white);
}

.directory-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

.directory-card h3 {
  font-size: 1.0625rem;
}

.directory-card p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  flex: 1;
}

.directory-card a {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.directory-card a::after {
  content: "→";
  transition: transform var(--transition-base);
}

.directory-card a:hover::after {
  transform: translateX(3px);
}

/* 快速开始与功能说明分栏 */
.guide-overview {
  background-color: var(--color-bg-soft);
  padding: 48px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.guide-overview > div {
  padding: 0 var(--container-padding);
}

.guide-overview .overview-left {
  border-right: 1px solid var(--color-border);
}

.overview-left,
.overview-right {
  max-width: 600px;
}

.overview-left h2,
.overview-right h2 {
  font-size: 1.375rem;
  margin-bottom: 12px;
}

.overview-left p,
.overview-right p {
  color: var(--color-text-light);
  margin-bottom: 12px;
  font-size: 0.9375rem;
}

.overview-left a,
.overview-right a {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.9375rem;
}

/* 问题入口 */
.problem-entry {
  padding: 56px 0;
  background-color: var(--color-white);
}

.problem-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

.problem-card h3 {
  font-size: 1rem;
  color: var(--color-text);
}

.problem-card p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  flex: 1;
}

.problem-card a {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.875rem;
}

/* 整理进度时间线 */
.progress-timeline {
  background-color: var(--color-deep);
  padding: 56px 0;
}

.progress-timeline .section-heading h2 {
  color: var(--color-white);
}

.progress-timeline .section-heading p {
  color: #9ca3af;
}

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

.progress-item {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.progress-mark {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 3px solid rgba(32, 178, 170, 0.25);
  margin-bottom: 14px;
}

.progress-item h3 {
  color: var(--color-white);
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.progress-item p {
  color: #9ca3af;
  font-size: 0.875rem;
  line-height: 1.6;
}

/* 边界说明 */
.boundary-note {
  background-color: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
}

.boundary-note p {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px var(--container-padding);
  color: var(--color-text-light);
  font-size: 0.875rem;
  text-align: center;
}

/* ==========================================================================
   pages — 内页通用与 quickstart
   ========================================================================== */

/* 内页 body 标记类（仅用于限定模块） */
.page-quickstart .quickstart-steps-section,
.page-quickstart .path-choice-section,
.page-quickstart .next-step-banner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* quickstart hero 图 */
.quickstart-hero-figure {
  max-width: var(--container-width);
  margin: 24px auto 0;
  padding: 0 var(--container-padding);
}

.quickstart-hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.quickstart-hero-figure figcaption {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  padding-top: 8px;
  text-align: center;
}

/* 四步主流程 */
.quickstart-steps-section {
  padding: 56px 0 16px;
}

.quickstart-steps-section h2 {
  font-size: 1.625rem;
  margin-bottom: 8px;
}

.quickstart-steps-section > p {
  color: var(--color-text-light);
  margin-bottom: 32px;
  max-width: 720px;
}

.quickstart-step-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.quickstart-step-item .step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 1.125rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.quickstart-step-item .step-content h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.quickstart-step-item .step-content p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  margin-bottom: 10px;
  max-width: 680px;
}

.quickstart-step-item .step-content .step-check {
  display: inline-flex;
  align-items: flex-start;
  gap: 6px;
  background-color: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 0.875rem;
  color: var(--color-text);
}

.quickstart-step-item .step-content .step-check strong {
  color: var(--color-primary-dark);
  font-weight: 600;
}

/* 起点选择卡 */
.path-choice-section {
  padding: 40px 0 16px;
}

.path-choice-section h2 {
  font-size: 1.625rem;
  margin-bottom: 8px;
}

.path-choice-section > p {
  color: var(--color-text-light);
  margin-bottom: 28px;
  max-width: 720px;
}

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

.path-choice-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

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

.path-choice-card h3 {
  font-size: 1.0625rem;
}

.path-choice-card p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  flex: 1;
}

.path-choice-card a {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.9375rem;
}

/* 下一步横幅 */
.next-step-banner {
  margin-top: 40px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.next-step-banner p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  margin-bottom: 16px;
}

.next-step-banner p a {
  color: var(--color-primary-dark);
  font-weight: 600;
}

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

.banner-link {
  display: inline-block;
  padding: 8px 20px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.banner-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* ==========================================================================
   pages — channel-map 频道地图
   ========================================================================== */

.page-channel-map .page-layout,
.page-channel-map .tag-cross-section,
.page-channel-map .map-guide-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.sidebar-left .page-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  padding-top: 32px;
  align-items: start;
}

/* 频道索引 */
.channel-index {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  position: sticky;
  top: 20px;
}

.channel-index h2 {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.channel-index-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.channel-index-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.9375rem;
  transition: background-color var(--transition-base);
}

.channel-index-list a:hover {
  background-color: var(--color-white);
  color: var(--color-primary-dark);
}

.channel-index-note {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  margin-top: 16px;
  line-height: 1.6;
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}

/* 频道面板 */
.channel-panels {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.channel-panel {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.channel-panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.channel-panel-head .channel-dot {
  width: 14px;
  height: 14px;
}

.channel-panel-head h2 {
  font-size: 1.25rem;
}

.channel-figure {
  margin-bottom: 16px;
}

.channel-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.channel-figure figcaption {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  padding-top: 6px;
}

.channel-panel > p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  margin-bottom: 16px;
}

.channel-panel h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tag-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 0.8125rem;
  color: var(--color-text);
}

/* 题材标签交叉说明表 */
.tag-cross-section {
  padding: 40px 0 0;
}

.tag-cross-section h2 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.tag-cross-section > p {
  color: var(--color-text-light);
  margin-bottom: 20px;
  max-width: 720px;
}

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

.tag-cross-table th,
.tag-cross-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.tag-cross-table thead th {
  background-color: var(--color-bg-soft);
  font-weight: 600;
}

.tag-cross-table tbody tr:last-child td {
  border-bottom: none;
}

.tag-cross-table td {
  color: var(--color-text-light);
}

.tag-cross-section > p:last-child {
  margin-top: 16px;
  font-size: 0.875rem;
}

/* 地图引导 */
.map-guide-section {
  padding: 40px 0 0;
}

.map-guide-section h2 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.map-guide-section > p {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.map-guide-list li {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 0.9375rem;
}

.map-guide-list a {
  color: var(--color-primary-dark);
  font-weight: 500;
}

/* ==========================================================================
   pages — watch-guide 观看设置
   ========================================================================== */

.page-watch-guide .content-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

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

.media-block img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.media-block figcaption {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  padding-top: 8px;
  text-align: center;
}

.content-section {
  padding: 40px 0 0;
}

.content-section h2 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.content-section > p {
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

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

.watch-category-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.watch-category-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.watch-category-card p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* 入口核验 */
.entry-check-section {
  padding-top: 48px;
}

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

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

.entry-check-list .check-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.entry-check-list .check-item h3::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: 700;
}

.entry-check-list .check-item p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* 设备准备表 */
.device-prep-section {
  padding-top: 48px;
}

.prep-table-wrapper {
  overflow-x: auto;
}

.prep-table {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-width: 560px;
}

.prep-table th,
.prep-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.prep-table thead th {
  background-color: var(--color-bg-soft);
  font-weight: 600;
}

.prep-table tbody tr:last-child th,
.prep-table tbody tr:last-child td {
  border-bottom: none;
}

.prep-table tbody th {
  background-color: var(--color-bg-soft);
  font-weight: 600;
  width: 140px;
}

.prep-table td {
  color: var(--color-text-light);
}

/* 下一步 */
.next-step-section {
  padding-bottom: 0;
}

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

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  font-size: 0.9375rem;
  font-weight: 500;
}

.text-link:hover {
  border-color: var(--color-primary);
  background-color: var(--color-white);
}

/* ==========================================================================
   pages — features 功能说明
   ========================================================================== */

.page-features .task-finder,
.page-features .function-table-section,
.page-features .topic-directory,
.page-features .relation-visual,
.page-features .update-log,
.page-features .next-read {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.page-features .topic-directory {
  padding-top: 48px;
  padding-bottom: 0;
}

.page-features .topic-directory .section-desc {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.task-finder,
.function-table-section,
.relation-visual,
.update-log,
.next-read {
  padding-top: 48px;
}

.task-finder h2,
.function-table-section h2,
.relation-visual h2,
.update-log h2,
.next-read h2 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.section-desc {
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

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

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

.task-card h3 {
  font-size: 1.0625rem;
}

.task-card p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  flex: 1;
}

.task-card p a {
  color: var(--color-primary-dark);
  font-weight: 500;
}

.task-link {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.9375rem;
}

/* 栏目功能对照表 */
.table-wrap {
  overflow-x: auto;
}

.function-table {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-width: 640px;
}

.function-table th,
.function-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.function-table thead th {
  background-color: var(--color-bg-soft);
  font-weight: 600;
}

.function-table tbody tr:last-child td {
  border-bottom: none;
}

.function-table td {
  color: var(--color-text-light);
}

/* 主题目录 */
.topic-groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.topic-group {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.topic-group h3 {
  font-size: 1.0625rem;
  margin-bottom: 6px;
}

.topic-question {
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 14px;
}

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

.topic-list a {
  color: var(--color-primary-dark);
  font-size: 0.9375rem;
}

.topic-list a::before {
  content: "·";
  margin-right: 6px;
  color: var(--color-text-light);
}

/* 关系图 */
.relation-figure {
  margin-bottom: 20px;
}

.relation-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.relation-figure figcaption {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  padding-top: 6px;
}

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

.relation-step {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.relation-step h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.relation-step p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: 10px;
}

.relation-step a {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.875rem;
}

/* 版本更新 */
.update-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.update-item {
  position: relative;
  padding: 0 0 24px 32px;
  border-left: 2px solid var(--color-border);
}

.update-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 2px solid var(--color-white);
}

.update-item:last-child {
  border-left-color: transparent;
}

.update-item h3 {
  font-size: 0.9375rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.update-item p {
  color: var(--color-text-light);
  font-size: 0.875rem;
}

/* 下一读 */
.next-read-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.next-link {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.9375rem;
}

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

/* ==========================================================================
   pages — troubleshooting 故障处理
   ========================================================================== */

.page-troubleshooting .trouble-categories,
.page-troubleshooting .trouble-flow,
.page-troubleshooting .decision-tree,
.page-troubleshooting .checklist-section,
.page-troubleshooting .support-path {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.trouble-categories,
.trouble-flow,
.decision-tree,
.checklist-section,
.support-path {
  padding-top: 48px;
}

.trouble-categories h2,
.trouble-flow h2,
.decision-tree h2,
.checklist-section h2,
.support-path h2 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.trouble-categories > p,
.decision-tree > p,
.checklist-section > p,
.support-path > p {
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

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

.category-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.category-card h3 {
  font-size: 1rem;
}

.category-card p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  flex: 1;
}

.category-card a {
  color: var(--color-primary-dark);
  font-size: 0.875rem;
  font-weight: 500;
}

/* 流向图 */
.trouble-flow h2 {
  margin-bottom: 20px;
}

.trouble-flow-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.trouble-flow-figure figcaption {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  padding-top: 6px;
}

/* 决策树 */
.decision-block {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
}

.decision-block > h3 {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.decision-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

.decision-row h4 {
  font-size: 0.9375rem;
  margin-bottom: 10px;
  color: var(--color-text);
}

.decision-row ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.decision-row li {
  color: var(--color-text-light);
  font-size: 0.875rem;
  line-height: 1.6;
  padding-left: 14px;
  position: relative;
}

.decision-row li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: var(--color-primary);
  font-weight: 700;
}

.decision-action p {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.decision-action a {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.875rem;
}

/* 自助核对清单 */
.checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist .check-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.check-box {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  margin-top: 2px;
}

.check-content h3 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
}

.check-content p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

.check-content p a {
  color: var(--color-primary-dark);
  font-weight: 500;
}

/* 支持路径 */
.support-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.support-step {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
}

.support-step .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-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 12px;
}

.support-step h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.support-step p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

.support-step p a {
  color: var(--color-primary-dark);
  font-weight: 500;
}

/* ==========================================================================
   pages — faq 常见问题
   ========================================================================== */

.page-faq .faq-layout,
.page-faq .faq-exit,
.page-faq .faq-related,
.page-faq .faq-visual {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.faq-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  padding-top: 32px;
  align-items: start;
}

.faq-toc {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  position: sticky;
  top: 20px;
}

.faq-toc-title {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.faq-toc-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.faq-toc-list a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.9375rem;
}

.faq-toc-list a:hover {
  background-color: var(--color-white);
  color: var(--color-primary-dark);
}

.faq-toc-note {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  margin-top: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
  line-height: 1.6;
}

.faq-panels {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.faq-group-title {
  font-size: 1.25rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.faq-item {
  margin-bottom: 12px;
}

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

.faq-item details[open] {
  border-color: var(--color-primary);
}

.faq-item summary {
  padding: 14px 18px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text);
  position: relative;
  padding-right: 40px;
  transition: color var(--transition-base);
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--color-primary);
  transition: transform var(--transition-base);
}

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

.faq-item details[open] summary {
  color: var(--color-primary-dark);
}

.faq-item details p {
  padding: 0 18px 16px;
  color: var(--color-text-light);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* FAQ 出口 */
.faq-exit {
  padding-top: 48px;
}

.faq-exit-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.faq-exit > p {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.faq-exit-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.faq-exit-links a {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.9375rem;
}

.faq-exit-links a:hover {
  border-color: var(--color-primary);
}

/* FAQ 相关卡片 */
.faq-related {
  padding-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-title {
  font-size: 1rem;
}

.related-card p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  flex: 1;
}

.related-card a {
  color: var(--color-primary-dark);
  font-weight: 500;
  font-size: 0.875rem;
}

/* FAQ 视觉图 */
.faq-visual {
  padding-top: 40px;
}

.faq-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.faq-figure figcaption {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  padding-top: 6px;
  text-align: center;
}

/* ==========================================================================
   pages — support 支持与反馈
   ========================================================================== */

.page-support .support-scope-section,
.page-support .support-process-section,
.page-support .support-boundary-section,
.page-support .support-figure,
.page-support .support-reentry-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.support-scope-section,
.support-process-section,
.support-boundary-section,
.support-reentry-section {
  padding-top: 48px;
}

.support-scope-section h2,
.support-process-section h2,
.support-boundary-section h2,
.support-reentry-section h2 {
  font-size: 1.375rem;
  margin-bottom: 8px;
}

.support-scope-section > p,
.support-process-section > p,
.support-boundary-section > p,
.support-reentry-section > p {
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
}

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

.scope-column {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.scope-column h3 {
  font-size: 1.0625rem;
  margin-bottom: 14px;
}

.scope-can-help h3 {
  color: var(--color-primary-dark);
}

.scope-cannot-help h3 {
  color: var(--color-text-light);
}

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

.scope-list li {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.scope-can-help .scope-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.scope-cannot-help .scope-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  color: #dc2626;
  font-weight: 700;
}

/* 处理顺序 */
.support-process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.process-step {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.process-step .step-number {
  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-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 12px;
}

.process-step .step-content h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.process-step .step-content p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 6px;
}

.process-step .step-content p a {
  color: var(--color-primary-dark);
  font-weight: 500;
}

.step-result {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  font-style: italic;
}

/* 边界说明 */
.support-boundary-section {
  padding-bottom: 0;
}

.boundary-list {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.boundary-list li {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}

.boundary-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.support-boundary-section > p:last-child {
  color: var(--color-text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* 支持配图 */
.support-figure {
  padding-top: 32px;
}

.support-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.support-figure figcaption {
  color: var(--color-text-light);
  font-size: 0.8125rem;
  padding-top: 6px;
  text-align: center;
}

/* 重新入口 */
.reentry-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.reentry-card {
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.reentry-card h3 {
  font-size: 1rem;
}

.reentry-card p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  flex: 1;
}

.reentry-card p a {
  color: var(--color-primary-dark);
  font-weight: 500;
}

/* ==========================================================================
   pages — 404 页面
   ========================================================================== */

.error-main {
  background-color: var(--color-bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px var(--container-padding);
}

.error-content {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: 4rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 16px;
}

.error-content h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

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

.error-back {
  display: inline-block;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: background-color var(--transition-base);
}

.error-back:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

.error-help {
  margin-top: 24px;
  color: var(--color-text-light);
  font-size: 0.875rem;
}

/* ==========================================================================
   responsive — 响应式断点
   ========================================================================== */

/* ≤ 1024px 平板 */
@media (max-width: 1024px) {
  .hero-timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .channel-strip {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .progress-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .path-choice-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .task-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .topic-groups {
    grid-template-columns: repeat(3, 1fr);
  }

  .relation-steps {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

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

  .support-steps {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .faq-related {
    grid-template-columns: repeat(3, 1fr);
  }

  .reentry-cards {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .overview-left {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .overview-left,
  .overview-right {
    padding: 24px var(--container-padding);
  }
}

/* ≤ 768px 手机大屏 */
@media (max-width: 768px) {
  :root {
    --container-padding: 20px;
  }

  h1 {
    font-size: 1.625rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .page-title {
    font-size: 1.625rem;
  }

  .hero-copy h1 {
    font-size: 1.75rem;
  }

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

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

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

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

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

  .path-choice-grid {
    grid-template-columns: 1fr;
  }

  .watch-category-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .relation-steps {
    grid-template-columns: 1fr;
  }

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

  .trouble-categories .category-grid {
    grid-template-columns: 1fr;
  }

  .support-steps {
    grid-template-columns: 1fr;
  }

  .support-process-steps {
    grid-template-columns: 1fr;
  }

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

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

  .support-scope-grid {
    grid-template-columns: 1fr;
  }

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

  .quickstart-step-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 侧栏布局切换 */
  .sidebar-left .page-layout {
    grid-template-columns: 1fr;
  }

  .channel-index,
  .faq-toc {
    position: static;
  }

  /* 移动导航 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-deep);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 12px 0;
    gap: 0;
    width: 100%;
  }

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

  .site-nav .nav-list a {
    display: block;
    padding: 12px var(--container-padding);
    border-radius: 0;
    border-left: 3px solid transparent;
    font-size: 1rem;
  }

  .site-nav .nav-list a.is-current {
    border-left-color: var(--color-primary);
    background-color: rgba(255, 255, 255, 0.06);
  }
}

/* ≤ 480px 手机窄屏 */
@media (max-width: 480px) {
  .channel-strip {
    grid-template-columns: 1fr;
  }

  .hero-timeline {
    padding: 24px var(--container-padding) 32px;
  }

  .timeline-hero {
    padding-top: 32px;
  }

  .footer-inner {
    padding-top: 32px;
  }

  .page-header {
    padding-top: 24px;
  }

  .quickstart-hero-figure,
  .media-block {
    margin-top: 16px;
  }

  .quickstart-step-item {
    padding: 20px 0;
  }

  .next-step-banner {
    padding: 24px;
  }

  .decision-block {
    padding: 20px;
  }

  .channel-panel {
    padding: 20px;
  }

  .banner-links {
    flex-direction: column;
  }

  .banner-link {
    text-align: center;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}