/* ==========================================================================
   base
   ========================================================================== */

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

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1f2a37;
  background-color: #f7f5f0;
}

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

a {
  color: #3c5a6b;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #e05e2b;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-weight: 700;
  line-height: 1.3;
  color: #1f2a37;
}

p {
  margin: 0 0 1em;
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

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

/* ==========================================================================
   layout
   ========================================================================== */

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

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.site-header {
  background-color: #1f2a37;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

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

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.02em;
}

.brand-name::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: #e05e2b;
  margin-right: 8px;
  border-radius: 2px;
  vertical-align: middle;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.nav-list li a.is-current {
  color: #ffffff;
  border-bottom-color: #e05e2b;
}

.site-footer {
  background-color: #1f2a37;
  color: rgba(255, 255, 255, 0.72);
  margin-top: 0;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h3 {
  font-size: 15px;
  color: #ffffff;
  margin-bottom: 14px;
  font-weight: 600;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 8px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  padding: 4px 0;
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
  line-height: 1.6;
}

/* 内页统一外壳 */

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.breadcrumb {
  font-size: 14px;
  color: #3c5a6b;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: #3c5a6b;
}

.breadcrumb a:hover {
  color: #e05e2b;
}

.breadcrumb-sep {
  color: #d9d5cc;
  margin: 0 2px;
}

.breadcrumb-current {
  color: #1f2a37;
  font-weight: 500;
}

.page-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid #d9d5cc;
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  color: #1f2a37;
  margin-bottom: 10px;
  line-height: 1.3;
}

.page-description {
  font-size: 16px;
  color: #3c5a6b;
  max-width: 720px;
  margin: 0;
  line-height: 1.7;
}

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

/* 按钮 */

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  text-align: center;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: #e05e2b;
  color: #ffffff;
  border: 1px solid #e05e2b;
}

.btn-primary:hover {
  background-color: #c74e1f;
  border-color: #c74e1f;
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  color: #3c5a6b;
  border: 1px solid #d9d5cc;
}

.btn-secondary:hover {
  border-color: #e05e2b;
  color: #e05e2b;
  background-color: rgba(224, 94, 43, 0.06);
}

/* 文本链接 */

.text-link {
  display: inline-block;
  font-size: 15px;
  color: #e05e2b;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.text-link:hover {
  border-bottom-color: #e05e2b;
  color: #c74e1f;
}

/* 区块标题 */

.section-title {
  font-size: 26px;
  color: #1f2a37;
  margin-bottom: 8px;
  line-height: 1.3;
}

.section-intro {
  font-size: 15px;
  color: #3c5a6b;
  margin-bottom: 24px;
  max-width: 680px;
}

/* ==========================================================================
   pages
   ========================================================================== */

/* ---------- index ---------- */

.home-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* 首屏工具区 */

.hero-toolbar {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 32px;
  padding: 40px 0 48px;
  align-items: stretch;
}

.hero-media {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-figure {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background-color: #e8e5df;
  aspect-ratio: 16 / 9;
}

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

.hero-copy {
  max-width: 620px;
}

.hero-copy h1 {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 12px;
  color: #1f2a37;
}

.hero-slogan {
  font-size: 18px;
  color: #e05e2b;
  font-weight: 500;
  margin-bottom: 12px;
}

.hero-text {
  font-size: 16px;
  color: #3c5a6b;
  line-height: 1.7;
  margin-bottom: 20px;
}

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

/* 信息总览面板 */

.info-panel {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.info-title {
  font-size: 18px;
  color: #1f2a37;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid #d9d5cc;
}

.info-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.info-stats li {
  background-color: #f7f5f0;
  border-radius: 6px;
  padding: 16px 12px;
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: #1f2a37;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.info-stats li::after {
  content: "";
  display: block;
  font-size: 13px;
  color: #3c5a6b;
  margin-top: 4px;
}

.info-stats li:nth-child(1)::after {
  content: "频道分类";
}

.info-stats li:nth-child(2)::after {
  content: "专题片单";
}

.announcement {
  background-color: #f7f5f0;
  border-left: 3px solid #e05e2b;
  padding: 16px;
  margin-bottom: 24px;
  border-radius: 0 6px 6px 0;
}

.announcement h3 {
  font-size: 15px;
  color: #1f2a37;
  margin-bottom: 6px;
}

.announcement p {
  font-size: 14px;
  color: #3c5a6b;
  margin: 0;
  line-height: 1.6;
}

.guide-entry {
  display: block;
  text-align: center;
  padding: 12px 16px;
  background-color: #e05e2b;
  color: #ffffff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  margin-top: auto;
  transition: background-color 0.2s ease;
}

.guide-entry:hover {
  background-color: #c74e1f;
  color: #ffffff;
}

/* 快速查找面板 */

.quick-find {
  padding: 48px 0;
  border-top: 1px solid #d9d5cc;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading .section-title {
  margin-bottom: 8px;
}

.section-heading p {
  font-size: 15px;
  color: #3c5a6b;
  margin: 0;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-chip {
  display: inline-block;
  padding: 10px 22px;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 6px;
  font-size: 15px;
  color: #1f2a37;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.tag-chip:hover {
  border-color: #e05e2b;
  color: #e05e2b;
  background-color: rgba(224, 94, 43, 0.04);
}

/* 棋盘式图文交替区 */

.chessboard {
  padding: 48px 0;
  border-top: 1px solid #d9d5cc;
}

.chessboard > .section-title {
  margin-bottom: 32px;
}

.chess-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}

.chess-row:last-child {
  margin-bottom: 0;
}

.chess-copy h3 {
  font-size: 22px;
  color: #1f2a37;
  margin-bottom: 12px;
}

.chess-copy p {
  font-size: 15px;
  color: #3c5a6b;
  line-height: 1.7;
  margin-bottom: 16px;
}

.chess-media {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background-color: #e8e5df;
  aspect-ratio: 4 / 3;
}

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

/* 精选视频卡片 */

.featured-cards {
  padding: 48px 0;
  border-top: 1px solid #d9d5cc;
}

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

.video-card {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.video-card:hover {
  box-shadow: 0 4px 16px rgba(31, 42, 55, 0.08);
  transform: translateY(-2px);
}

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

.video-card h3 {
  font-size: 17px;
  color: #1f2a37;
  margin: 16px 16px 8px;
  line-height: 1.4;
}

.video-card .meta {
  font-size: 14px;
  color: #3c5a6b;
  margin: 0 16px 12px;
}

.status {
  display: inline-block;
  margin: 0 16px 16px;
  font-size: 13px;
  color: #e05e2b;
  background-color: rgba(224, 94, 43, 0.08);
  padding: 4px 12px;
  border-radius: 4px;
  font-weight: 500;
}

/* 观看指南编号步骤 */

.guide-steps {
  padding: 48px 0;
  border-top: 1px solid #d9d5cc;
}

.steps-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.step-item {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 24px 20px;
  position: relative;
}

.step-num {
  display: inline-block;
  font-size: 32px;
  font-weight: 700;
  color: #e05e2b;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 17px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin-bottom: 8px;
}

.step-exception {
  font-size: 13px;
  color: #e05e2b;
  background-color: rgba(224, 94, 43, 0.06);
  border-radius: 4px;
  padding: 8px 10px;
  margin: 0;
  line-height: 1.5;
}

.guide-steps > .text-link {
  margin-top: 8px;
}

/* 内容说明与反馈入口条 */

.entry-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 48px 0;
  border-top: 1px solid #d9d5cc;
}

.entry-block {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 28px 24px;
}

.entry-block h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.entry-block p {
  font-size: 14px;
  color: #3c5a6b;
  margin-bottom: 16px;
  line-height: 1.6;
}

.entry-block .btn-secondary {
  padding: 8px 20px;
  font-size: 14px;
}

/* ---------- pingdao 频道分类 ---------- */

.channel-filter {
  margin-bottom: 40px;
}

.channel-filter h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 16px;
}

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

.filter-tag {
  padding: 8px 18px;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 6px;
  font-size: 14px;
  color: #3c5a6b;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.filter-tag:hover {
  border-color: #e05e2b;
  color: #e05e2b;
}

.filter-tag.is-active {
  background-color: #e05e2b;
  border-color: #e05e2b;
  color: #ffffff;
}

.channel-list {
  margin-bottom: 40px;
}

.channel-list > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 24px;
}

.channel-item {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
  align-items: center;
}

.channel-item:last-child {
  margin-bottom: 0;
}

.channel-media {
  margin: 0;
  border-radius: 6px;
  overflow: hidden;
  background-color: #e8e5df;
  aspect-ratio: 4 / 3;
}

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

.channel-info h3 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 6px;
}

.channel-direction {
  font-size: 14px;
  color: #e05e2b;
  font-weight: 500;
  margin-bottom: 8px;
}

.channel-info p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin-bottom: 8px;
}

.channel-example {
  font-size: 14px;
  margin-bottom: 0 !important;
}

.channel-example a {
  color: #e05e2b;
  font-weight: 500;
}

.channel-example a:hover {
  color: #c74e1f;
}

/* 相关入口 */

.related-links {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 24px;
}

.related-links h2,
.related-links h3 {
  font-size: 18px;
  color: #1f2a37;
  margin-bottom: 16px;
}

.related-links ul li {
  margin-bottom: 4px;
}

.related-links ul a {
  display: block;
  padding: 8px 0;
  font-size: 15px;
  color: #3c5a6b;
  border-bottom: 1px solid #f0eee9;
}

.related-links ul a:hover {
  color: #e05e2b;
}

/* ---------- zhuanti 专题片单 ---------- */

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

.topic-list-section > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 24px;
}

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

.topic-card {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.topic-figure {
  margin: 0;
  aspect-ratio: 16 / 9;
  background-color: #e8e5df;
  overflow: hidden;
}

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

.topic-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topic-card-body h3 {
  font-size: 18px;
  color: #1f2a37;
  margin-bottom: 12px;
}

.topic-card-body p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin-bottom: 10px;
}

.topic-card-body p strong {
  color: #1f2a37;
  font-weight: 600;
  margin-right: 4px;
}

.topic-card-body a {
  margin-top: auto;
  color: #e05e2b;
  font-size: 14px;
  font-weight: 500;
}

.topic-card-body a:hover {
  color: #c74e1f;
}

/* 片单构成说明 */

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

.structure-section > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.structure-intro {
  font-size: 15px;
  color: #3c5a6b;
  margin-bottom: 24px;
}

.term-block {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.term-block:last-child {
  margin-bottom: 0;
}

.term-block h3 {
  font-size: 18px;
  color: #1f2a37;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid #f0eee9;
}

.term-block p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin-bottom: 8px;
}

.term-block p strong {
  color: #1f2a37;
  font-weight: 600;
  margin-right: 6px;
}

/* 关联频道入口 */

.related-channels {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 24px;
}

.related-channels h2 {
  font-size: 18px;
  color: #1f2a37;
  margin-bottom: 6px;
}

.related-channels > p {
  font-size: 14px;
  color: #3c5a6b;
  margin-bottom: 16px;
}

.channel-link-list li {
  margin-bottom: 8px;
}

.channel-link-list a {
  display: block;
  padding: 10px 14px;
  background-color: #f7f5f0;
  border-radius: 6px;
  font-size: 15px;
  color: #1f2a37;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.channel-link-list a:hover {
  background-color: rgba(224, 94, 43, 0.08);
  color: #e05e2b;
}

/* ---------- guankan 观看指南 ---------- */

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

.guide-steps > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 24px;
}

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

.steps-grid .step-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 24px;
}

.steps-grid .step-number {
  font-size: 36px;
  font-weight: 700;
  color: #e05e2b;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.step-content h3 {
  font-size: 17px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin-bottom: 8px;
}

.step-expect strong {
  color: #1f2a37;
  font-weight: 600;
  margin-right: 4px;
}

.step-warning strong {
  color: #e05e2b;
  font-weight: 600;
  margin-right: 4px;
}

/* 入口核验方法 */

.verify-methods {
  margin-bottom: 48px;
}

.verify-methods > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.verify-methods > p {
  font-size: 15px;
  color: #3c5a6b;
  margin-bottom: 20px;
}

.table-wrapper {
  overflow-x: auto;
  margin-bottom: 24px;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
}

.verify-table {
  min-width: 640px;
  background-color: #ffffff;
}

.verify-table th {
  background-color: #1f2a37;
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
}

.verify-table td {
  padding: 12px 16px;
  font-size: 14px;
  color: #3c5a6b;
  border-top: 1px solid #f0eee9;
  line-height: 1.6;
}

.verify-table tbody tr:nth-child(even) {
  background-color: #faf9f6;
}

.guide-media {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background-color: #e8e5df;
  aspect-ratio: 16 / 7;
}

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

.guide-media figcaption {
  font-size: 13px;
  color: #3c5a6b;
  text-align: center;
  padding: 10px 16px;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-top: none;
  border-radius: 0 0 8px 8px;
}

/* 常见问题摘要 */

.faq-summary {
  margin-bottom: 48px;
}

.faq-summary > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 16px;
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  color: #1f2a37;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
}

.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: #e05e2b;
  font-weight: 400;
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin: 0;
}

/* 相关链接 */

.related-links {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 24px;
}

.related-links-label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: #1f2a37;
  margin-bottom: 12px;
}

.related-links-item {
  display: inline-block;
  margin-right: 16px;
  font-size: 14px;
  color: #e05e2b;
  font-weight: 500;
}

.related-links-item:hover {
  color: #c74e1f;
}

/* ---------- shuoming 内容说明 ---------- */

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

.principles-section > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 24px;
}

.principle-item {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  align-items: start;
}

.principle-item:last-child {
  margin-bottom: 0;
}

.principle-item h3 {
  font-size: 17px;
  color: #1f2a37;
  margin-bottom: 6px;
  grid-column: 2;
}

.principle-item p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin: 0;
  grid-column: 2;
}

.principle-item h3::before {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  background-color: #e05e2b;
  border-radius: 2px;
  grid-column: 1;
  grid-row: 1;
  margin-top: 6px;
}

/* 内容边界 */

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

.boundary-section > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.boundary-section > .section-intro {
  margin-bottom: 24px;
}

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

.boundary-col {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 24px;
}

.boundary-col h3 {
  font-size: 17px;
  color: #1f2a37;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid #f0eee9;
}

.boundary-col ul li {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  padding: 6px 0 6px 20px;
  position: relative;
}

.boundary-col ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #e05e2b;
}

/* 站点立场 */

.stance-section {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 28px 24px;
  margin-bottom: 40px;
}

.stance-section h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 12px;
}

.stance-section p {
  font-size: 15px;
  color: #3c5a6b;
  line-height: 1.7;
  margin-bottom: 12px;
  max-width: 760px;
}

.stance-section p:last-child {
  margin-bottom: 0;
}

/* 相关页面 */

.info-figure {
  margin: 24px 0 0;
  border-radius: 8px;
  overflow: hidden;
  background-color: #e8e5df;
  aspect-ratio: 16 / 7;
}

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

.info-figure figcaption {
  font-size: 13px;
  color: #3c5a6b;
  text-align: center;
  padding: 10px 16px;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-top: none;
  border-radius: 0 0 8px 8px;
}

/* ---------- fankui 问题反馈 ---------- */

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

.feedback-process > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 20px;
}

.content-media {
  margin: 0 0 20px;
  border-radius: 8px;
  overflow: hidden;
  background-color: #e8e5df;
  aspect-ratio: 16 / 6;
}

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

.content-media figcaption {
  font-size: 13px;
  color: #3c5a6b;
  text-align: center;
  padding: 10px 16px;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-top: none;
  border-radius: 0 0 8px 8px;
}

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

.process-step {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 24px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
}

.process-step .step-number {
  font-size: 32px;
  font-weight: 700;
  color: #e05e2b;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.step-content h3 {
  font-size: 17px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin-bottom: 8px;
}

.step-expect strong {
  color: #1f2a37;
  font-weight: 600;
  margin-right: 4px;
}

/* FAQ 折叠 */

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

.faq-section > h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 8px;
}

.faq-list {
  margin-top: 20px;
}

.faq-content p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
  margin: 0;
}

.faq-content a {
  color: #e05e2b;
  font-weight: 500;
}

.faq-content a:hover {
  color: #c74e1f;
}

/* 处理预期 */

.processing-note {
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 28px 24px;
  margin-bottom: 40px;
}

.processing-note h2 {
  font-size: 20px;
  color: #1f2a37;
  margin-bottom: 12px;
}

.processing-note p {
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.7;
  margin-bottom: 10px;
  max-width: 720px;
}

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

/* 相关页面链接块 */

.related-links-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.related-link {
  display: block;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-link:hover {
  border-color: #e05e2b;
  box-shadow: 0 2px 8px rgba(31, 42, 55, 0.06);
}

.related-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: #1f2a37;
  margin-bottom: 6px;
}

.related-link:hover .related-title {
  color: #e05e2b;
}

.related-desc {
  display: block;
  font-size: 14px;
  color: #3c5a6b;
  line-height: 1.6;
}

/* ---------- 404 ---------- */

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

.error-panel {
  max-width: 560px;
  text-align: center;
  background-color: #ffffff;
  border: 1px solid #d9d5cc;
  border-radius: 8px;
  padding: 48px 40px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #e05e2b;
  line-height: 1;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.error-panel h1 {
  font-size: 24px;
  color: #1f2a37;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: #3c5a6b;
  margin-bottom: 24px;
  line-height: 1.7;
}

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.error-help {
  font-size: 14px;
  color: #3c5a6b;
  margin: 0;
}

.error-help a {
  color: #e05e2b;
  font-weight: 500;
}

.error-help a:hover {
  color: #c74e1f;
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-toolbar {
    grid-template-columns: 1fr 300px;
    gap: 24px;
  }

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

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

  .channel-item {
    grid-template-columns: 220px 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 56px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: #1f2a37;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    z-index: 100;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  }

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

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

  .nav-list li a.is-current {
    border-bottom: none;
    border-left-color: #e05e2b;
  }

  .site-nav {
    position: relative;
  }

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

  .hero-toolbar {
    grid-template-columns: 1fr;
    padding: 24px 0 32px;
  }

  .info-panel {
    order: 2;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .chess-row {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 32px;
  }

  .chess-row.row-reverse .chess-media {
    order: -1;
  }

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

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

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

  .footer-columns {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    padding: 16px 16px 24px;
  }

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

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

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

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

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

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

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

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

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

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

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

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

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

  .info-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

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

  .principle-item h3::before {
    display: none;
  }

  .process-step {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

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