/* ==========================================================================
   天美传播 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */
:root {
  --ink: #14213d;
  --link: #2f5bd7;
  --warn: #b8730f;
  --warn-bg: #fdf6e8;
  --page-bg: #f7f8fa;
  --surface: #ffffff;
  --muted: #5c6470;
  --line: #e2e5ea;
  --line-strong: #cfd4dc;
  --radius: 5px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

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

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

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.9;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

p {
  margin: 0;
}

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

figure {
  margin: 0;
}

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

a {
  color: var(--link);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

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

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

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
}

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

/* 页头 ------------------------------------------------------------------ */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line-strong);
  position: relative;
  z-index: 20;
}

.header-top {
  background: var(--ink);
  color: #ffffff;
}

.header-top-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 48px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  white-space: nowrap;
}

.brand:hover,
.brand:focus-visible {
  color: #ffffff;
  text-decoration: none;
}

.brand-name {
  display: inline-block;
}

.brand-slogan {
  font-size: 13px;
  color: #c3cbdc;
  line-height: 1.6;
  margin-right: auto;
}

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

.quick-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  font-size: 13px;
  color: #dbe2f0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  white-space: nowrap;
}

.quick-nav a:hover,
.quick-nav a:focus-visible {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
}

.quick-nav a.is-current {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.55);
}

.header-main {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.header-main-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 56px;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.menu-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  border-radius: 1px;
}

.primary-nav {
  width: 100%;
}

.primary-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 4px;
}

.primary-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 56px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--link);
  text-decoration: none;
  border-bottom-color: var(--line-strong);
}

.primary-nav a.is-current {
  color: var(--link);
  font-weight: 700;
  border-bottom-color: var(--link);
}

/* 内页公共容器 ---------------------------------------------------------- */
.inner-main {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--link);
}

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

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

.page-header {
  padding: 6px 0 18px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 32px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--ink);
}

.page-container {
  width: 100%;
  max-width: 1080px;
}

.page-title-block {
  padding: 20px 0 4px;
}

.page-lead,
.page-summary {
  max-width: 720px;
  font-size: 16px;
  color: var(--ink);
}

.page-meta,
.page-owner,
.page-hero-meta,
.page-section-note {
  margin-top: 8px;
  font-size: 14px;
  color: var(--muted);
}

/* 页脚 ------------------------------------------------------------------ */
.site-footer {
  flex-shrink: 0;
  background: var(--surface);
  border-top: 1px solid var(--line-strong);
  margin-top: 8px;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 36px 24px 24px;
}

.footer-col {
  min-width: 0;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--link);
}

.footer-text {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

.footer-link-more {
  margin-top: 10px;
  font-size: 14px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
}

.footer-bottom p {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px 20px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   components · 通用组件
   -------------------------------------------------------------------------- */
.section-title {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.section-lead {
  max-width: 720px;
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 20px;
}

.section-more {
  margin-top: 18px;
  font-size: 15px;
}

.section-more a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-align: center;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background: var(--link);
  border-color: var(--link);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #2649b0;
  border-color: #2649b0;
  color: #ffffff;
}

.btn-ghost {
  background: var(--surface);
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--link);
  color: var(--link);
}

/* 表格 */
.table-scroll,
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.channel-table,
.data-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.8;
  text-align: left;
}

.channel-table caption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.channel-table th,
.channel-table td,
.data-table th,
.data-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.channel-table thead th,
.data-table thead th {
  background: #eef1f6;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.channel-table tbody tr:last-child td,
.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.channel-table tbody tr:hover {
  background: #f4f6fa;
}

.channel-table td a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
}

/* 图文块 */
.content-figure {
  margin: 0 0 24px;
  max-width: 720px;
}

.content-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #eef1f6;
}

.content-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* 说明块 */
.note-block {
  margin-top: 24px;
  padding: 16px 18px;
  background: #f1f3f7;
  border-left: 3px solid var(--line-strong);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.note-block h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.note-block p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

.note-links {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  font-size: 14px;
}

.note-links a {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
}

/* 警示块 */
.warn-block {
  margin: 32px 0 0;
  padding: 20px 22px;
  background: var(--warn-bg);
  border-left: 4px solid var(--warn);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.warn-block h2 {
  font-size: 20px;
  color: var(--warn);
  margin-bottom: 8px;
}

.warn-lead {
  font-size: 14px;
  color: #6b4a10;
  margin-bottom: 10px;
}

.warn-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.warn-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.9;
  color: #5a3f0d;
}

.warn-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  background: var(--warn);
  border-radius: 1px;
}

/* 链接列表 */
.link-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-size: 15px;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main {
  width: 100%;
}

.narrow {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

.wide {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 首屏 */
.hero {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: center;
  gap: 40px;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px 36px;
}

.hero-lead {
  min-width: 0;
}

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  padding: 2px 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--link);
  background: #eef2fd;
  border-radius: var(--radius);
}

.hero-lead h1 {
  font-size: 34px;
  line-height: 1.4;
  margin-bottom: 14px;
}

.hero-desc {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.hero-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
}

.hero-media {
  min-width: 0;
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #eef1f6;
}

.hero-media figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* 即时内容带 */
.content-strip {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.content-strip-inner {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 36px 24px;
}

.video-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.video-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.video-card:hover {
  border-color: var(--line-strong);
}

.video-card-media {
  margin: 0;
}

.video-card-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #eef1f6;
}

.video-card-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.video-card-title {
  font-size: 16px;
  line-height: 1.6;
}

.video-card-channel {
  font-size: 13px;
  color: var(--link);
  line-height: 1.7;
}

.video-card-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

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

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

.channel-tag-list a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--ink);
  background: #f1f3f7;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.channel-tag-list a:hover,
.channel-tag-list a:focus-visible {
  color: var(--link);
  border-color: var(--link);
  background: #eef2fd;
  text-decoration: none;
}

.channel-tags-more {
  font-size: 14px;
  margin-left: auto;
}

/* 本期导读 */
.briefing {
  padding: 40px 0;
}

.briefing-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 22px;
}

.briefing-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.briefing-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.briefing-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 32px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--link);
  background: #eef2fd;
  border-radius: var(--radius);
}

.briefing-body h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.briefing-body p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}

/* 频道档案速览 */
.channel-overview {
  padding: 40px 0;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* 观看设置三步 */
.setup-steps {
  padding: 40px 0;
}

.step-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.step-col {
  min-width: 0;
  padding: 18px 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--link);
  border-radius: var(--radius);
}

.step-col .step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--link);
  margin-bottom: 6px;
}

.step-col .step-action {
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 10px;
}

.step-col .step-expect,
.step-col .step-error {
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
  margin-bottom: 8px;
}

.step-col .step-error {
  margin-bottom: 0;
  padding-top: 8px;
  border-top: 1px dashed var(--line-strong);
  color: #6b4a10;
}

/* 入口辨识警示块 */
.notice {
  padding: 40px 0;
}

.notice-box {
  padding: 22px 24px;
  background: var(--warn-bg);
  border: 1px solid #efd9b0;
  border-left: 4px solid var(--warn);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.notice-title {
  font-size: 22px;
  color: var(--warn);
  margin-bottom: 8px;
}

.notice-lead {
  font-size: 15px;
  color: #6b4a10;
  line-height: 1.9;
  margin-bottom: 12px;
}

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

.notice-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.9;
  color: #5a3f0d;
}

.notice-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 7px;
  height: 7px;
  background: var(--warn);
  border-radius: 1px;
}

.notice-action {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed #e2c893;
  font-size: 14px;
}

.notice-action a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--warn);
  font-weight: 700;
}

.notice-action a:hover,
.notice-action a:focus-visible {
  color: #8d5809;
}

/* 专题档案摘录 */
.feature-excerpt {
  padding: 40px 0;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature-block {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.feature-block:first-of-type {
  padding-top: 8px;
}

.feature-block:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.feature-media {
  min-width: 0;
}

.feature-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #eef1f6;
}

.feature-media figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.feature-body {
  min-width: 0;
}

.feature-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 10px;
  font-size: 12px;
  line-height: 1.8;
  color: var(--link);
  background: #eef2fd;
  border-radius: var(--radius);
}

.feature-title {
  font-size: 20px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.feature-scope {
  font-size: 15px;
  color: var(--ink);
  line-height: 1.9;
  margin-bottom: 8px;
}

.feature-order {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 8px;
}

.feature-link {
  font-size: 14px;
}

.feature-link a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-weight: 700;
}

/* 常见问题 */
.faq {
  padding: 40px 0;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 12px 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 400;
  color: var(--link);
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "\2212";
}

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

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

.faq-answer p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}

/* 内容年鉴摘要 */
.change-digest {
  padding: 40px 0 48px;
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.change-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.change-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 140px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.change-type {
  font-size: 13px;
  font-weight: 700;
  color: var(--link);
  line-height: 1.8;
}

.change-channel {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.8;
}

.change-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

/* --------------------------------------------------------------------------
   pages · 频道档案
   -------------------------------------------------------------------------- */
.anchor-bar-wrap {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}

.anchor-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 10px 24px;
}

.anchor-bar a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f7f8fa;
}

.anchor-bar a:hover,
.anchor-bar a:focus-visible {
  color: var(--link);
  border-color: var(--link);
  background: #eef2fd;
  text-decoration: none;
}

.section {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-of-type {
  border-bottom: 0;
}

.section h2 {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.channel-block {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.channel-block:first-of-type {
  border-top: 0;
  padding-top: 4px;
}

.channel-block h3 {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 6px;
}

.channel-block > p {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.9;
}

.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.topic-list li {
  padding: 3px 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
  background: #f1f3f7;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.channel-distinction {
  max-width: 720px;
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
  background: #f1f3f7;
  border-left: 3px solid var(--line-strong);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.compare-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.compare-item {
  min-width: 0;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.compare-item h3 {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 6px;
}

.compare-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

.topic-map-list {
  border-top: 1px solid var(--line);
}

.topic-map-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) 96px;
  gap: 16px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.topic-map-channel {
  font-weight: 700;
  color: var(--ink);
}

.topic-map-topic {
  color: var(--muted);
}

.topic-map-row a {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 32px;
}

/* --------------------------------------------------------------------------
   pages · 专题档案
   -------------------------------------------------------------------------- */
.feature-entry {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.feature-entry .feature-media {
  min-width: 0;
}

.feature-figure {
  margin: 0;
}

.feature-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #eef1f6;
}

.feature-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.feature-tags li {
  padding: 2px 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--link);
  background: #eef2fd;
  border-radius: var(--radius);
}

.feature-entry .feature-body {
  min-width: 0;
}

.feature-entry .feature-body h2 {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.feature-entry .feature-body h3 {
  font-size: 16px;
  line-height: 1.6;
  margin: 16px 0 6px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.feature-entry .feature-scope {
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink);
}

.feature-list,
.feature-steps {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.feature-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  background: var(--link);
  border-radius: 1px;
}

.feature-steps {
  counter-reset: fstep;
}

.feature-steps li {
  position: relative;
  counter-increment: fstep;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.feature-steps li::before {
  content: counter(fstep);
  position: absolute;
  left: 0;
  top: 3px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--link);
  background: #eef2fd;
  border-radius: 50%;
}

.feature-related {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.feature-related a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.feature-cross,
.feature-note {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.feature-note {
  border-bottom: 0;
}

.feature-cross h2,
.feature-note h2 {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.cross-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.cross-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.cross-list li:last-child {
  border-bottom: 0;
}

.cross-list h3 {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 4px;
}

.cross-list p {
  max-width: 760px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}

/* --------------------------------------------------------------------------
   pages · 观看设置
   -------------------------------------------------------------------------- */
.page-heading {
  padding: 20px 0 4px;
}

.page-layout {
  display: block;
  padding-top: 8px;
}

.content-body {
  max-width: 720px;
  min-width: 0;
}

.content-section {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.content-section:last-child {
  border-bottom: 0;
}

.content-section h2 {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.content-section > p {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 14px;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.checklist li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink);
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border: 2px solid var(--link);
  border-radius: 2px;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: wstep;
  border-top: 1px solid var(--line);
}

.step-item {
  position: relative;
  counter-increment: wstep;
  padding: 16px 0 16px 48px;
  border-bottom: 1px solid var(--line);
}

.step-item::before {
  content: counter(wstep);
  position: absolute;
  left: 0;
  top: 16px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--link);
  background: #eef2fd;
  border-radius: var(--radius);
}

.step-item .step-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  margin-bottom: 4px;
}

.step-item .step-action,
.step-item .step-expect,
.step-item .step-error {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 4px;
}

.step-item .step-expect {
  color: var(--ink);
}

.step-item .step-error {
  margin-top: 6px;
  margin-bottom: 0;
  padding: 8px 12px;
  font-size: 14px;
  color: #6b4a10;
  background: #f1f3f7;
  border-radius: var(--radius);
}

.data-table {
  min-width: 600px;
}

/* --------------------------------------------------------------------------
   pages · 入口辨识
   -------------------------------------------------------------------------- */
.page-header-wrap {
  padding-bottom: 8px;
}

.content-shell {
  max-width: 760px;
  padding-top: 20px;
}

.article-media {
  margin: 0 0 24px;
}

.article-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #eef1f6;
}

.article-media figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.check-section {
  padding-bottom: 24px;
}

.check-section h2 {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.check-section > p {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 16px;
}

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

.check-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 32px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--link);
  background: #eef2fd;
  border-radius: var(--radius);
}

.check-body {
  min-width: 0;
}

.check-body h3 {
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 6px;
}

.check-action,
.check-standard,
.check-fail {
  font-size: 14px;
  line-height: 1.9;
  margin-bottom: 4px;
}

.check-standard {
  color: var(--ink);
}

.check-fail {
  margin-bottom: 0;
  color: #6b4a10;
}

.handle-section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.handle-section h2 {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.handle-section > p {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 14px;
}

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

.handle-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.handle-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--warn);
  background: var(--warn-bg);
  border-radius: 50%;
}

.handle-item p {
  font-size: 15px;
  line-height: 1.9;
}

.handle-note {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 14px;
  color: var(--muted);
}

.handle-note a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-weight: 700;
}

.related-section {
  padding: 28px 0 8px;
  border-top: 1px solid var(--line);
}

.related-section h2 {
  font-size: 20px;
  line-height: 1.5;
  margin-bottom: 10px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
}

.related-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-links a:hover,
.related-links a:focus-visible {
  color: var(--link);
  border-color: var(--link);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 内容年鉴
   -------------------------------------------------------------------------- */
.page-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  margin: 0 -24px;
}

.page-hero-inner {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px;
}

.page-hero-summary {
  max-width: 760px;
  font-size: 16px;
  line-height: 1.9;
}

.section-change-types,
.section-channel-changes,
.section-feature-changes,
.section-order-advice {
  padding: 32px 0;
}

.section-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--muted);
}

.section-note a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.change-type-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.change-type-item {
  min-width: 0;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--link);
  border-radius: var(--radius);
}

.change-type-item h3 {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 4px;
}

.change-type-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

.section-figure {
  margin: 0 0 8px;
  max-width: 760px;
}

.section-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #eef1f6;
}

.section-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.section-channel-changes .change-list,
.section-feature-changes .change-list {
  border-top: 1px solid var(--line);
}

.section-channel-changes .change-item,
.section-feature-changes .change-item {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.change-item-type {
  display: inline-block;
  margin-bottom: 6px;
  padding: 1px 10px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.8;
  color: var(--link);
  background: #eef2fd;
  border-radius: var(--radius);
}

.change-item-channel {
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 4px;
}

.change-item-desc {
  max-width: 760px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}

.change-item-target {
  margin-top: 6px;
  font-size: 14px;
}

.change-item-target a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

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

.advice-item {
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.advice-action {
  font-size: 15px;
  line-height: 1.9;
}

.advice-action a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

/* --------------------------------------------------------------------------
   pages · 纠错反馈
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1080px;
}

.feedback-types,
.feedback-info,
.feedback-process,
.feedback-guide {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.feedback-guide {
  border-bottom: 0;
}

.feedback-types h2,
.feedback-info h2,
.feedback-process h2,
.feedback-guide h2 {
  font-size: 22px;
  line-height: 1.5;
  margin-bottom: 8px;
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.type-card {
  min-width: 0;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--link);
  border-radius: var(--radius);
}

.type-name {
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 6px;
}

.type-case {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.9;
  margin-bottom: 4px;
}

.type-note {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

.feedback-figure {
  margin: 0 0 22px;
  max-width: 720px;
}

.feedback-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #eef1f6;
}

.feedback-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.info-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.info-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.info-item:last-child {
  border-bottom: 0;
}

.info-label {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 4px;
}

.info-item p {
  max-width: 720px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 18px;
  counter-reset: pstep;
}

.process-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  counter-increment: pstep;
}

.process-step .step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--link);
  background: #eef2fd;
  border-radius: 50%;
}

.process-step .step-body {
  min-width: 0;
}

.process-step .step-action {
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 4px;
}

.process-step .step-expect,
.process-step .step-abnormal {
  font-size: 14px;
  line-height: 1.9;
  margin-bottom: 4px;
}

.process-step .step-expect {
  color: var(--ink);
}

.process-step .step-abnormal {
  margin-bottom: 0;
  color: #6b4a10;
}

.guide-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.guide-item {
  min-width: 0;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.guide-item a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 16px;
  font-weight: 700;
}

.guide-item p {
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.9;
}

.feedback-guide + .related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 20px 0 8px;
}

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

a.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

a.related-links-item:hover,
a.related-links-item:focus-visible {
  color: var(--link);
  border-color: var(--link);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.error-inner {
  max-width: 720px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--line-strong);
  margin-bottom: 8px;
}

.error-title {
  font-size: 32px;
  line-height: 1.45;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 28px;
}

.error-section {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.error-section h2 {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 10px;
}

.error-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 20px;
}

.error-list a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-size: 15px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  background: var(--link);
  border: 1px solid var(--link);
  border-radius: var(--radius);
}

.error-btn:hover,
.error-btn:focus-visible {
  background: #2649b0;
  border-color: #2649b0;
  color: #ffffff;
  text-decoration: none;
}

.error-btn-plain {
  color: var(--ink);
  background: var(--surface);
  border-color: var(--line-strong);
}

.error-btn-plain:hover,
.error-btn-plain:focus-visible {
  color: var(--link);
  background: var(--surface);
  border-color: var(--link);
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-inner {
    gap: 28px;
    padding: 32px 24px 30px;
  }

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

  .feature-block,
  .feature-entry {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 24px;
  }

  .change-item {
    grid-template-columns: 88px minmax(0, 130px) minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  body {
    font-size: 16px;
  }

  .header-top-inner {
    flex-wrap: wrap;
    gap: 4px 14px;
    padding: 8px 16px;
    min-height: 0;
  }

  .brand-slogan {
    flex: 1 1 100%;
    order: 3;
    margin-right: 0;
    font-size: 12px;
  }

  .quick-nav {
    margin-left: auto;
  }

  .quick-nav a {
    min-height: 34px;
    padding: 0 10px;
    font-size: 12px;
  }

  .header-main-inner {
    padding: 0 16px;
    min-height: 54px;
    gap: 12px;
  }

  .menu-toggle {
    display: inline-flex;
    order: 2;
    margin-left: auto;
  }

  .primary-nav {
    order: 3;
    flex: 1 1 100%;
    display: none;
  }

  .primary-nav.is-open {
    display: block;
    padding-bottom: 10px;
  }

  .primary-nav ul {
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--line);
    padding-top: 6px;
  }

  .primary-nav a {
    min-height: 48px;
    padding: 0 4px;
    border-bottom: 1px solid var(--line);
  }

  .primary-nav li:last-child a {
    border-bottom: 0;
  }

  .primary-nav a.is-current {
    border-bottom-color: var(--line);
  }

  .inner-main {
    padding: 0 16px 40px;
  }

  .breadcrumb {
    padding: 14px 0 4px;
    font-size: 12px;
  }

  .page-header {
    padding: 4px 0 14px;
  }

  .page-title {
    font-size: 24px;
    line-height: 1.5;
  }

  .page-container {
    max-width: 100%;
  }

  .narrow,
  .wide {
    padding: 0 16px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 26px 16px 26px;
  }

  .hero-lead h1 {
    font-size: 25px;
    line-height: 1.45;
  }

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

  .hero-actions {
    gap: 10px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

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

  .content-strip-inner {
    padding: 28px 16px;
  }

  .video-cards {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .channel-tags {
    align-items: flex-start;
  }

  .channel-tags-more {
    margin-left: 0;
    min-height: 34px;
    display: inline-flex;
    align-items: center;
  }

  .briefing,
  .setup-steps,
  .notice,
  .faq,
  .change-digest {
    padding: 30px 0;
  }

  .channel-overview,
  .feature-excerpt {
    padding: 30px 0;
  }

  .section-title {
    font-size: 19px;
  }

  .step-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .feature-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 20px 0;
  }

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

  .feature-title {
    font-size: 18px;
  }

  .change-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    padding: 14px 0;
  }

  .change-type {
    font-size: 12px;
  }

  .anchor-bar {
    padding: 10px 16px;
  }

  .section {
    padding: 26px 0;
  }

  .section h2,
  .content-section h2,
  .check-section h2,
  .handle-section h2,
  .feature-cross h2,
  .feature-note h2,
  .feedback-types h2,
  .feedback-info h2,
  .feedback-process h2,
  .feedback-guide h2 {
    font-size: 19px;
  }

  .compare-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .topic-map-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    padding: 12px 0;
  }

  .topic-map-row a {
    justify-content: flex-start;
    min-height: 36px;
  }

  .feature-entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 26px 0;
  }

  .feature-entry .feature-body h2 {
    font-size: 19px;
  }

  .feature-figure img {
    aspect-ratio: 16 / 9;
  }

  .page-heading {
    padding: 16px 0 2px;
  }

  .content-body {
    max-width: 100%;
  }

  .content-section {
    padding: 20px 0;
  }

  .step-item {
    padding-left: 44px;
  }

  .content-shell {
    padding-top: 16px;
  }

  .check-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .check-index {
    width: 32px;
    height: 30px;
    font-size: 13px;
  }

  .handle-item {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 10px;
  }

  .page-hero {
    margin: 0 -16px;
  }

  .page-hero-inner {
    padding: 16px;
  }

  .change-type-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .section-change-types,
  .section-channel-changes,
  .section-feature-changes,
  .section-order-advice {
    padding: 26px 0;
  }

  .feedback-types,
  .feedback-info,
  .feedback-process,
  .feedback-guide {
    padding: 26px 0;
  }

  .type-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .guide-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .process-step {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
  }

  .process-step .step-index {
    width: 30px;
    height: 30px;
    font-size: 13px;
  }

  .error-main {
    padding: 32px 16px 48px;
  }

  .error-code {
    font-size: 38px;
  }

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

  .error-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 28px 16px 20px;
  }

  .footer-links a {
    min-height: 40px;
    font-size: 14px;
  }

  .footer-bottom p {
    padding: 12px 16px 18px;
  }
}

@media (max-width: 480px) {
  .hero-lead h1 {
    font-size: 23px;
  }

  .hero-eyebrow {
    font-size: 12px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .channel-tag-list a {
    min-height: 36px;
    font-size: 13px;
  }

  .briefing-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

  .briefing-num {
    width: 34px;
    height: 30px;
    font-size: 14px;
  }

  .notice-box,
  .warn-block {
    padding: 16px 16px;
  }

  .notice-title,
  .warn-block h2 {
    font-size: 18px;
  }

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

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

  .error-btn {
    width: 100%;
  }

  .related-links a,
  a.related-links-item {
    min-height: 40px;
  }
}