/* ============================================================
   base / reset
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1C1B1A;
  background-color: #F4F2ED;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

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

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

/* ============================================================
   layout / 全站骨架
   ============================================================ */

.header-inner,
.site-main,
.footer-columns,
.footer-bottom {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ---- 页头 ---- */
.site-header {
  background-color: #F4F2ED;
  border-bottom: 1px solid #D8D2C8;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: #1C1B1A;
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 13px;
  color: #6B6763;
  font-family: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #1C1B1A;
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: #6B6763;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-list li a:hover {
  color: #1C1B1A;
}

.nav-list li a.is-current {
  color: #A85A3A;
  border-bottom-color: #A85A3A;
  font-weight: 600;
}

/* ---- 页脚 ---- */
.site-footer {
  background-color: #F4F2ED;
  border-top: 1px solid #D8D2C8;
  margin-top: 80px;
}

.footer-columns {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 48px;
  padding-top: 56px;
  padding-bottom: 48px;
}

.footer-heading {
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 16px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links li a {
  font-size: 14px;
  color: #6B6763;
  transition: color 0.2s ease;
}

.footer-links li a:hover {
  color: #A85A3A;
}

.footer-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid #D8D2C8;
  padding-top: 20px;
  padding-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 13px;
  color: #6B6763;
}

/* ---- 内页公共骨架 ---- */
.inner-main {
  padding-top: 32px;
  padding-bottom: 0;
  min-height: 60vh;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #6B6763;
  margin-bottom: 32px;
}

.breadcrumb a {
  color: #6B6763;
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: #A85A3A;
}

.breadcrumb-sep {
  color: #D8D2C8;
}

.breadcrumb-current {
  color: #1C1B1A;
}

.page-header {
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  line-height: 1.4;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: #6B6763;
  max-width: 720px;
}

.section-title {
  font-size: 22px;
  line-height: 1.5;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 16px;
}

.section-desc,
.section-description {
  font-size: 16px;
  color: #6B6763;
  margin-bottom: 28px;
  max-width: 720px;
}

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

/* ---- 相关链接 ---- */
.related-links {
  max-width: 1200px;
  margin: 64px auto 0;
  padding: 24px;
  border-top: 1px solid #D8D2C8;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.related-links-label {
  font-size: 14px;
  color: #6B6763;
  font-weight: 600;
}

.related-links-item {
  font-size: 14px;
  color: #A85A3A;
  padding: 6px 12px;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.related-links-item:hover {
  border-color: #A85A3A;
  background-color: #F4F2ED;
}

/* ---- 检查清单 ---- */
.checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
}

.check-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid #A85A3A;
  border-radius: 4px;
  position: relative;
  margin-top: 2px;
}

.check-text {
  font-size: 15px;
  color: #1C1B1A;
  line-height: 1.6;
}

/* ============================================================
   components / 首页
   ============================================================ */

/* ---- 问题导向 hero ---- */
.hero-issue {
  background-color: #F4F2ED;
  border-bottom: 1px solid #D8D2C8;
}

.hero-issue {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 24px 64px;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.4;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 12px;
}

.hero-lead {
  font-size: 16px;
  color: #6B6763;
  margin-bottom: 32px;
  max-width: 480px;
}

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

.issue-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.issue-item:hover {
  border-color: #A85A3A;
  box-shadow: 0 2px 12px rgba(28, 27, 26, 0.06);
}

.issue-index {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px;
  color: #A85A3A;
  font-weight: 600;
  margin-top: 4px;
  flex-shrink: 0;
}

.issue-text {
  flex: 1;
}

.issue-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 4px;
}

.issue-desc {
  font-size: 14px;
  color: #6B6763;
  margin-bottom: 8px;
  line-height: 1.6;
}

.issue-link {
  display: inline-block;
  font-size: 14px;
  color: #A85A3A;
  font-weight: 600;
}

.issue-link:hover {
  text-decoration: underline;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-figure {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 8px;
  background-color: #D8D2C8;
}

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

/* ---- 内容预览 ---- */
.content-preview {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 24px 0;
}

.preview-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
}

.preview-heading {
  font-size: 22px;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 12px;
}

.filter-label {
  font-size: 14px;
  color: #6B6763;
  margin-bottom: 16px;
}

.filter-tags {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.filter-tags li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: #6B6763;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.filter-tags li a:hover {
  color: #A85A3A;
  border-left-color: #A85A3A;
}

.preview-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.time-group-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #D8D2C8;
}

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

.preview-card {
  display: block;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.preview-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(28, 27, 26, 0.08);
}

.preview-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card-label {
  display: block;
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 600;
  color: #1C1B1A;
}

/* ---- 观看路径时间线 ---- */
.path-timeline {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 24px 0;
}

.section-heading {
  font-size: 22px;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 24px;
}

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

.timeline-node {
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  border-top: 3px solid #A85A3A;
}

.node-index {
  display: inline-block;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  color: #A85A3A;
  font-weight: 600;
  margin-bottom: 12px;
}

.node-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.node-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
  margin-bottom: 12px;
}

.node-link {
  font-size: 14px;
  color: #A85A3A;
  font-weight: 600;
}

.node-link:hover {
  text-decoration: underline;
}

/* ---- 内容边界 ---- */
.boundary-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 24px 0;
}

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

.boundary-card {
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
}

.boundary-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.boundary-text {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.7;
}

/* ---- 后续步骤 ---- */
.next-steps {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 24px 0;
}

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

.step-card {
  display: block;
  padding: 28px 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.step-card:hover {
  border-color: #A85A3A;
  transform: translateY(-2px);
}

.step-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 6px;
}

.step-desc {
  display: block;
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

/* ============================================================
   components / 频道导航页
   ============================================================ */

.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}

.channel-filter {
  position: sticky;
  top: 96px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  padding: 24px;
}

.filter-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 16px;
}

.filter-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.filter-link {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: #6B6763;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.filter-link:hover {
  color: #A85A3A;
  background-color: #F4F2ED;
}

.filter-link.is-active {
  color: #A85A3A;
  background-color: #F4F2ED;
  font-weight: 600;
}

.filter-note {
  font-size: 13px;
  color: #6B6763;
  line-height: 1.6;
  padding-top: 12px;
  border-top: 1px solid #D8D2C8;
}

.channel-content {
  display: flex;
  flex-direction: column;
  gap: 48px;
  min-width: 0;
}

.featured-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
}

.featured-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: #D8D2C8;
}

.featured-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-info {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-name {
  font-size: 22px;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 12px;
}

.featured-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.7;
  margin-bottom: 8px;
}

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

.channel-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  align-items: center;
  padding: 16px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.channel-item:hover {
  border-color: #A85A3A;
}

.item-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: 4px;
  background-color: #D8D2C8;
}

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

.item-name {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 4px;
}

.item-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

.channel-tip {
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  border-left: 3px solid #A85A3A;
}

.tip-text {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.7;
  margin-bottom: 8px;
}

.tip-text:last-child {
  margin-bottom: 0;
}

/* ============================================================
   components / 题材专题页
   ============================================================ */

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

.featured-topic-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
}

.featured-topic-figure {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #D8D2C8;
}

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

.featured-topic-content {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.topic-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 13px;
  font-weight: 600;
  color: #A85A3A;
  background-color: #F4F2ED;
  border: 1px solid #D8D2C8;
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 12px;
}

.featured-topic-title {
  font-size: 22px;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 12px;
}

.featured-topic-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.7;
  margin-bottom: 12px;
}

.featured-topic-meta {
  font-size: 13px;
  color: #6B6763;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.topic-grid-section {
  margin-bottom: 48px;
}

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

.topic-card {
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(28, 27, 26, 0.08);
}

.topic-card-figure {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: #D8D2C8;
}

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

.topic-card-body {
  padding: 20px;
}

.topic-card-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.topic-card-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

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

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

.process-step {
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  border-top: 3px solid #A85A3A;
}

.process-number {
  display: inline-block;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  color: #A85A3A;
  font-weight: 600;
  margin-bottom: 12px;
}

.process-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.process-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

.topic-next-steps {
  margin-bottom: 48px;
}

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

.next-step-card {
  display: block;
  padding: 28px 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.next-step-card:hover {
  border-color: #A85A3A;
  transform: translateY(-2px);
}

.next-step-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.next-step-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
  margin-bottom: 12px;
}

.next-step-link {
  font-size: 14px;
  color: #A85A3A;
  font-weight: 600;
}

/* ============================================================
   components / 观看指南页
   ============================================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.layout-shell.layout-right-sidebar {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}

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

.guide-section {
  margin-bottom: 48px;
  scroll-margin-top: 96px;
}

.guide-section .section-title {
  margin-bottom: 12px;
}

.timeline-four {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
}

.timeline-index {
  flex-shrink: 0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px;
  color: #A85A3A;
  font-weight: 600;
  margin-top: 2px;
}

.timeline-title {
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 4px;
}

.timeline-text {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-item {
  padding: 16px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
}

.step-title {
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 6px;
}

.step-text {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

.checklist-block {
  margin-top: 16px;
}

.guide-figure {
  margin-top: 20px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
}

.guide-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.figure-caption {
  display: block;
  padding: 12px 16px;
  font-size: 13px;
  color: #6B6763;
  background-color: #F4F2ED;
}

.node-card {
  padding: 16px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  margin-bottom: 12px;
}

.node-title {
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 6px;
}

.node-text {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

.block-subtitle {
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.layout-sidebar.sidebar-right {
  position: sticky;
  top: 96px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  padding: 24px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 16px;
}

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

.sidebar-list li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: #6B6763;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.sidebar-list li a:hover {
  color: #A85A3A;
  border-left-color: #A85A3A;
}

/* ============================================================
   components / 常见疑问页
   ============================================================ */

.faq-index-section {
  margin-bottom: 48px;
}

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

.type-item {
  display: block;
  padding: 20px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  text-align: center;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.type-item:hover {
  border-color: #A85A3A;
  color: #A85A3A;
}

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

.faq-group {
  margin-bottom: 32px;
}

.faq-group-title {
  font-size: 18px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #D8D2C8;
}

.faq-item {
  margin-bottom: 12px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: #A85A3A;
  flex-shrink: 0;
  margin-left: 12px;
}

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

.faq-item summary:hover {
  color: #A85A3A;
}

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

.faq-answer p {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.7;
  margin-bottom: 8px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-unresolved-section {
  margin-bottom: 48px;
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  border-left: 3px solid #A85A3A;
}

.unresolved-text {
  font-size: 15px;
  color: #6B6763;
  line-height: 1.7;
}

.unresolved-text a {
  color: #A85A3A;
  font-weight: 600;
}

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

.faq-figure {
  margin-bottom: 48px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
}

.faq-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.faq-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: #6B6763;
  background-color: #F4F2ED;
}

/* ============================================================
   components / 反馈通道页
   ============================================================ */

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

.feedback-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.feedback-intro-text .section-title {
  margin-bottom: 12px;
}

.feedback-intro-text .section-desc {
  margin-bottom: 12px;
}

.feedback-intro-media {
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  overflow: hidden;
}

.feedback-intro-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.feedback-intro-media figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: #6B6763;
  background-color: #F4F2ED;
}

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

.feedback-type-card {
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
}

.feedback-type-title {
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.feedback-type-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

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

.feedback-process-section .process-step {
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  border-top: 3px solid #A85A3A;
}

.process-num {
  display: inline-block;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  color: #A85A3A;
  font-weight: 600;
  margin-bottom: 12px;
}

.process-content .process-title {
  font-size: 16px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.process-content .process-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

.feedback-checklist-section .checklist {
  max-width: 720px;
}

.improve-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.improve-card {
  padding: 24px;
  background-color: #fff;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
}

.improve-card-title {
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  margin-bottom: 8px;
}

.improve-card-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.6;
}

.improve-more-desc {
  font-size: 14px;
  color: #6B6763;
  line-height: 1.7;
}

.improve-more-desc a {
  color: #A85A3A;
  font-weight: 600;
}

.improve-more-desc a:hover {
  text-decoration: underline;
}

/* ============================================================
   components / 404 页
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

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

.error-code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 64px;
  font-weight: 700;
  color: #A85A3A;
  line-height: 1.2;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 28px;
  font-weight: 700;
  color: #1C1B1A;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: #6B6763;
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.error-link {
  display: inline-block;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: #1C1B1A;
  border: 1px solid #D8D2C8;
  border-radius: 6px;
  background-color: #fff;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.error-link:hover {
  border-color: #A85A3A;
  color: #A85A3A;
}

/* ============================================================
   responsive / 响应式
   ============================================================ */

@media (max-width: 1024px) {
  .hero-issue {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .hero-content {
    max-width: 640px;
  }

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

  .filter-tags {
    flex-direction: row;
    flex-wrap: wrap;
  }

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

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

  .page-layout.sidebar-left {
    grid-template-columns: 220px 1fr;
    gap: 32px;
  }

  .layout-shell.layout-right-sidebar {
    grid-template-columns: 1fr 240px;
    gap: 32px;
  }

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

@media (max-width: 768px) {
  .header-inner,
  .site-main,
  .footer-columns,
  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

  .header-inner {
    height: 64px;
  }

  .brand-tag {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #F4F2ED;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav .nav-list {
    flex-direction: column;
    gap: 8px;
    padding: 24px;
  }

  .nav-list li a {
    font-size: 20px;
    padding: 14px 24px;
    text-align: center;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero-issue {
    padding: 48px 16px 40px;
    gap: 32px;
  }

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

  .content-preview,
  .path-timeline,
  .boundary-section,
  .next-steps {
    padding-left: 16px;
    padding-right: 16px;
  }

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

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

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

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

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

  .channel-filter {
    position: static;
  }

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

  .featured-media {
    aspect-ratio: 16 / 9;
  }

  .featured-info {
    padding: 24px;
  }

  .channel-item {
    grid-template-columns: 120px 1fr;
    gap: 16px;
  }

  .layout-shell.layout-right-sidebar {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .layout-sidebar.sidebar-right {
    position: static;
    order: -1;
  }

  .sidebar-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
  }

  .sidebar-list li a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 8px 12px;
  }

  .sidebar-list li a:hover {
    border-bottom-color: #A85A3A;
  }

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

  .featured-topic-figure {
    aspect-ratio: 16 / 9;
  }

  .featured-topic-content {
    padding: 24px;
  }

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

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

  .feedback-process-section .process-timeline {
    grid-template-columns: 1fr;
  }

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

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

  .feedback-types-grid {
    grid-template-columns: 1fr;
  }

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

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

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 40px;
    padding-bottom: 32px;
  }

  .related-links {
    margin-top: 48px;
    padding: 16px;
  }
}

@media (max-width: 480px) {
  .channel-item {
    grid-template-columns: 1fr;
  }

  .item-media {
    aspect-ratio: 16 / 9;
  }

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

  .hero-content h1 {
    font-size: 24px;
  }

  .issue-item {
    padding: 14px;
  }

  .timeline-node,
  .boundary-card,
  .step-card {
    padding: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}