/* ============================================================
   糖心vlog小桃酱 · 全站样式
   研究报告风：米白纸感背景、墨色正文、赭石强调
   ============================================================ */

/* ------------------------------------------------------------
   Base
   ------------------------------------------------------------ */
:root {
  --color-bg: #f7f4ee;
  --color-text: #26251f;
  --color-accent: #9c5a2c;
  --color-accent-dark: #7a4520;
  --color-block: #efe9dd;
  --color-border: #d9d2c3;
  --color-muted: #5c5a53;
  --color-white: #fffdf8;
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --container-width: 1080px;
  --text-width: 760px;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow-card: 0 1px 3px rgba(38, 37, 31, 0.06);
  --shadow-hover: 0 4px 12px rgba(38, 37, 31, 0.1);
}

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

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

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

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

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

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

ul, ol {
  list-style-position: inside;
}

/* 隐藏辅助 class */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* 容器 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ------------------------------------------------------------
   Layout — 页头与导航
   ------------------------------------------------------------ */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.header-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand-block {
  flex-shrink: 0;
}

.brand-link {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

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

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.nav-list li a.is-current {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

/* 汉堡按钮（桌面隐藏） */
.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;
}

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

/* 频道选择器条 */
.channel-selector {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--color-border);
}

.channel-scope {
  font-size: 13px;
  color: var(--color-muted);
  white-space: nowrap;
}

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

.channel-tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 13px;
  color: var(--color-text);
  background-color: var(--color-block);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.channel-tag:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

/* ------------------------------------------------------------
   Layout — 主内容区
   ------------------------------------------------------------ */
.site-main {
  flex: 1;
  width: 100%;
}

.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 60px;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 60px;
}

/* 面包屑 */
.breadcrumb {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

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

.breadcrumb-current {
  color: var(--color-muted);
}

/* 页面标题区 */
.page-header {
  margin-bottom: 36px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: var(--color-muted);
  max-width: var(--text-width);
}

/* 页面摘要（guide 页专用） */
.inner-shell {
  max-width: var(--text-width);
  margin: 0 auto;
}

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

.page-summary {
  font-size: 16px;
  color: var(--color-muted);
  line-height: 1.75;
}

/* 区块通用 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.4;
}

.section-desc,
.section-intro,
.block-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 20px;
  max-width: var(--text-width);
}

/* ------------------------------------------------------------
   Components — 通用文字链接
   ------------------------------------------------------------ */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

/* ------------------------------------------------------------
   Components — 引用块
   ------------------------------------------------------------ */
blockquote {
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-block);
  padding: 16px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

blockquote p {
  margin: 0;
}

.tag-quote,
.lead-quote,
.goal-quote,
.intro-quote,
.position-quote,
.editor-quote {
  margin-bottom: 24px;
}

/* ------------------------------------------------------------
   Components — 首页首屏全宽列表区
   ------------------------------------------------------------ */
.spotlight-list {
  margin-bottom: 56px;
}

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

.spotlight-heading .section-title {
  font-size: 22px;
}

/* 重点卡片 */
.spotlight-primary {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.spotlight-primary:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.spotlight-media {
  overflow: hidden;
  border-radius: var(--radius-sm);
  min-height: 200px;
}

.spotlight-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 200px;
}

.spotlight-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 12px;
}

.spotlight-kicker {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.spotlight-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}

/* 紧凑条目 */
.spotlight-compact-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.compact-item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.compact-item:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-1px);
}

.compact-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

.compact-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.compact-link {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  white-space: nowrap;
}

/* ------------------------------------------------------------
   Components — 频道分类总览（首页）
   ------------------------------------------------------------ */
.channel-overview {
  margin-bottom: 56px;
}

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

.section-heading .section-title {
  font-size: 22px;
}

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

.channel-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.channel-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.channel-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.channel-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-top: 4px;
}

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

.channel-card-audience {
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-block);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   Components — 专题片单推荐（首页）
   ------------------------------------------------------------ */
.topic-recommend {
  margin-bottom: 56px;
}

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

.topic-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.topic-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.topic-card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

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

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

/* ------------------------------------------------------------
   Components — 观看指南摘要（首页四步横条）
   ------------------------------------------------------------ */
.guide-steps {
  margin-bottom: 56px;
}

.steps-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  position: relative;
  padding-left: 28px;
}

.step-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  width: 20px;
  height: 20px;
  background-color: var(--color-accent);
  border-radius: 50%;
  opacity: 0.15;
}

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

.steps-more {
  margin-top: 4px;
}

/* ------------------------------------------------------------
   Components — FAQ 折叠（首页与 FAQ 页共用）
   ------------------------------------------------------------ */
.faq-preview {
  margin-bottom: 56px;
}

.faq-preview-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-accent);
  font-weight: 400;
}

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

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.75;
}

.faq-answer {
  padding: 0 20px 16px;
}

.faq-answer p {
  padding: 0;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.75;
}

.faq-more-link {
  display: inline-block;
  margin-top: 4px;
}

/* ------------------------------------------------------------
   Components — 编辑说明横幅（首页）
   ------------------------------------------------------------ */
.editor-note {
  background-color: var(--color-block);
  border-radius: var(--radius);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.editor-note blockquote {
  border-left: none;
  background: none;
  padding: 0;
  font-size: 15px;
  flex: 1;
  min-width: 260px;
}

.editor-links {
  display: flex;
  gap: 20px;
  flex-shrink: 0;
}

/* ------------------------------------------------------------
   Components — 可排序数据表（频道分类页）
   ------------------------------------------------------------ */
.sortable-table {
  margin-bottom: 48px;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 620px;
}

.data-table thead th {
  background-color: var(--color-block);
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  position: sticky;
  top: 0;
  z-index: 1;
}

.data-table thead th:hover {
  color: var(--color-accent);
}

.sort-indicator {
  display: inline-block;
  margin-left: 4px;
  font-size: 12px;
  color: var(--color-accent);
}

.data-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  line-height: 1.65;
}

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

.data-table tbody tr:hover td {
  background-color: rgba(239, 233, 221, 0.4);
}

.table-note {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
}

/* ------------------------------------------------------------
   Components — 分类内容卡（频道分类页）
   ------------------------------------------------------------ */
.category-cards {
  margin-bottom: 48px;
}

.category-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.category-card-media {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

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

.category-card-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.category-card-feature,
.category-card-boundary,
.category-card-audience {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.category-card-feature strong,
.category-card-boundary strong,
.category-card-audience strong {
  display: block;
  font-size: 13px;
  color: var(--color-accent);
  margin-bottom: 2px;
}

.card-link {
  margin-top: 6px;
  align-self: flex-start;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

/* ------------------------------------------------------------
   Components — 相关阅读链接（频道分类页）
   ------------------------------------------------------------ */
.related-links {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
}

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

.related-link-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: block;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

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

.related-link-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.related-link-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* 内页底部相关链接条 */
.site-main .related-links:not(.related-links-label + .related-links) {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

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

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  padding: 4px 12px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

/* ------------------------------------------------------------
   Components — 观看指南页（四段式步骤）
   ------------------------------------------------------------ */
.goal-block {
  margin-bottom: 40px;
}

.goal-quote p {
  font-size: 15px;
}

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

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

.steps-list .step-item {
  padding: 24px;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.step-head h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.steps-list .step-item p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.75;
  margin-bottom: 8px;
}

.step-result {
  font-size: 14px;
  color: var(--color-accent);
  background-color: var(--color-block);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* 流程示意图 */
.flow-image-section {
  margin-bottom: 48px;
}

.flow-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

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

.flow-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 12px;
  text-align: center;
  line-height: 1.6;
}

/* FAQ 链接卡片（观看指南页） */
.faq-links-section {
  margin-bottom: 40px;
}

.faq-link-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.faq-link-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
}

.faq-link-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.faq-link-card h3 a {
  color: var(--color-accent);
}

.faq-link-card p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

.more-faq-link {
  font-size: 14px;
}

/* ------------------------------------------------------------
   Components — 专题片单页
   ------------------------------------------------------------ */
.theme-intro {
  margin-bottom: 48px;
}

.intro-block {
  max-width: var(--text-width);
}

.intro-block h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.intro-block p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 14px;
}

.intro-block blockquote {
  margin-top: 20px;
}

.topic-collection {
  margin-bottom: 48px;
}

.topic-collection > h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

.topic-collection .topic-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.topic-media {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.topic-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.topic-figure figcaption {
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 6px;
  line-height: 1.5;
}

.topic-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.topic-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text);
}

.topic-body > p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.topic-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.topic-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  padding-left: 12px;
  border-left: 2px solid var(--color-border);
}

.list-item-name {
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}

.list-item-desc {
  color: var(--color-muted);
}

.topic-note {
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-block);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

/* 延伸阅读（专题页） */
.reading-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.reading-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  display: block;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.reading-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.reading-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.reading-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   Components — FAQ 页
   ------------------------------------------------------------ */
.faq-cats {
  margin-bottom: 40px;
}

.faq-cats-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.faq-cats-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.faq-cat-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.faq-cat-tag {
  display: inline-block;
  padding: 6px 18px;
  font-size: 14px;
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.faq-cat-tag:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.faq-group {
  margin-bottom: 36px;
}

.faq-group-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-block);
  margin-bottom: 16px;
}

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

/* 路径引导图 */
.faq-path {
  margin-bottom: 40px;
}

.faq-path-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.faq-path-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.faq-path-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

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

.faq-path-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
  line-height: 1.6;
}

/* 更多帮助 */
.faq-more {
  background-color: var(--color-block);
  border-radius: var(--radius);
  padding: 24px 28px;
}

.faq-more-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.faq-more-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

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

.faq-more-link {
  display: inline-block;
  padding: 6px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.faq-more-link:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* ------------------------------------------------------------
   Components — 投稿合作页
   ------------------------------------------------------------ */
.intro-block .intro-quote {
  margin-bottom: 16px;
}

.intro-text {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  max-width: var(--text-width);
}

.audience-block,
.materials-block,
.process-block,
.feedback-block {
  margin-bottom: 48px;
}

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

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

.audience-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
}

.audience-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.audience-card .card-note {
  font-size: 13px;
  color: var(--color-accent);
  background-color: var(--color-block);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-top: 4px;
}

.materials-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: var(--text-width);
}

.materials-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.materials-list strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

.materials-list span {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: var(--text-width);
  margin-bottom: 20px;
}

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

.process-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.process-step h3 .step-num {
  width: 28px;
  height: 28px;
  font-size: 14px;
}

.process-step p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.process-step .step-result {
  font-size: 13px;
}

.process-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

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

.process-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
  line-height: 1.6;
}

.feedback-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.feedback-link {
  display: inline-block;
  padding: 6px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.feedback-link:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.feedback-note {
  font-size: 13px;
  color: var(--color-muted);
  max-width: var(--text-width);
}

/* ------------------------------------------------------------
   Components — 站点说明页
   ------------------------------------------------------------ */
.site-position {
  margin-bottom: 48px;
  max-width: var(--text-width);
}

.site-position h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.site-position p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 14px;
}

.position-quote {
  margin-top: 20px;
}

.org-structure {
  margin-bottom: 48px;
}

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

.org-layer {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

.org-layer h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  position: relative;
  padding-left: 24px;
}

.org-layer h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  background-color: var(--color-accent);
  border-radius: 3px;
  opacity: 0.3;
}

.org-layer p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.org-figure {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

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

.org-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 10px;
  line-height: 1.6;
}

.editor-principles {
  margin-bottom: 48px;
}

.principles-list {
  list-style: none;
  counter-reset: principle;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: var(--text-width);
}

.principles-list li {
  counter-increment: principle;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  position: relative;
  padding-left: 60px;
}

.principles-list li::before {
  content: counter(principle);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 30px;
  height: 30px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.principles-list h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.principles-list p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

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

.reading-link {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.reading-link:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.reading-link-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.reading-link-desc {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   Components — 404 页
   ------------------------------------------------------------ */
.error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 60px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.error-panel {
  text-align: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 48px 40px;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-size: 64px;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 8px;
}

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

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

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

.error-btn {
  display: inline-block;
  padding: 10px 24px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.error-btn:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
}

.error-link {
  display: inline-block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  transition: border-color 0.2s ease;
}

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

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

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-brand-name {
  font-size: 19px;
  font-weight: 800;
  color: var(--color-text);
}

.footer-tagline {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col ul a {
  font-size: 14px;
  color: var(--color-muted);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   Responsive — 960px 断点
   ------------------------------------------------------------ */
@media (max-width: 960px) {
  .header-shell {
    min-height: 56px;
    padding: 0 16px;
  }

  .brand-link {
    font-size: 19px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(38, 37, 31, 0.08);
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 8px 0;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
  }

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

  .nav-list li a {
    padding: 12px 20px;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .nav-list li a.is-current {
    border-bottom: none;
    border-left-color: var(--color-accent);
    background-color: rgba(239, 233, 221, 0.4);
  }

  /* 页头需要相对定位以便绝对定位导航 */
  .site-header {
    position: relative;
  }

  .channel-selector {
    padding: 10px 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .channel-selector::-webkit-scrollbar {
    display: none;
  }

  .channel-scope {
    flex-shrink: 0;
  }

  .channel-tags {
    flex-wrap: nowrap;
    flex-shrink: 0;
  }

  .channel-tag {
    white-space: nowrap;
  }

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

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

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

  .compact-item {
    grid-template-columns: 110px 1fr;
  }

  .compact-link {
    grid-column: 2;
  }

  .channel-card-grid,
  .topic-card-row {
    grid-template-columns: 1fr;
  }

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

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

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

  .faq-link-list,
  .reading-grid,
  .audience-grid,
  .org-layers,
  .reading-links {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .footer-bottom {
    grid-column: 1 / -1;
  }
}

/* ------------------------------------------------------------
   Responsive — 390px 手机断点
   ------------------------------------------------------------ */
@media (max-width: 390px) {
  .header-shell {
    padding: 0 12px;
  }

  .brand-link {
    font-size: 18px;
  }

  .channel-selector {
    padding: 8px 12px;
  }

  .channel-scope {
    font-size: 12px;
  }

  .channel-tag {
    font-size: 12px;
    padding: 3px 12px;
  }

  .home-main,
  .inner-main {
    padding: 16px 12px 40px;
  }

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

  .section-title {
    font-size: 20px;
  }

  .spotlight-primary {
    padding: 16px;
  }

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

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

  .compact-link {
    grid-column: 1;
  }

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

  .step-title {
    font-size: 16px;
  }

  .editor-note {
    flex-direction: column;
    align-items: flex-start;
  }

  .editor-links {
    gap: 12px;
  }

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

  .data-table {
    min-width: 560px;
  }

  .error-panel {
    padding: 32px 20px;
  }

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

/* ------------------------------------------------------------
   Enhanced — 滚动淡入动画（不影响初始可见性）
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: no-preference) {
  .site-main section {
    animation: fadeInUp 0.4s ease both;
  }

  .site-main section:nth-child(2) {
    animation-delay: 0.05s;
  }

  .site-main section:nth-child(3) {
    animation-delay: 0.1s;
  }

  .site-main section:nth-child(4) {
    animation-delay: 0.15s;
  }

  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}