/* ==========================================================================
   国产天美 · 站点样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --ink: #14243A;
  --paper: #F6F3EC;
  --panel: #FFFFFF;
  --teal: #2E6F6A;
  --accent: #D9542B;
  --muted: #5A6874;
  --line: #DCE2E6;
  --shell: 1120px;
  --gutter: 24px;
  --serif: "Source Han Serif SC", "Songti SC", "Noto Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

p {
  margin: 0;
}

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

a {
  color: var(--teal);
  text-decoration: none;
  transition: color 160ms ease;
}

a:hover,
a:focus-visible {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

strong {
  font-weight: 700;
  color: var(--ink);
}

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

/* --------------------------------------------------------------------------
   layout：全站骨架
   -------------------------------------------------------------------------- */

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

.site-header {
  background-color: var(--ink);
  color: #FFFFFF;
  position: sticky;
  top: 0;
  z-index: 60;
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  color: #FFFFFF;
  white-space: nowrap;
  padding: 8px 0;
}

.brand:hover,
.brand:focus-visible {
  color: #FFFFFF;
}

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

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

.nav-item {
  position: relative;
}

.nav-item > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.82);
  border-bottom: 2px solid transparent;
}

.nav-item > a:hover,
.nav-item > a:focus-visible {
  color: #FFFFFF;
  border-bottom-color: rgba(217, 84, 43, 0.5);
}

.nav-item.is-current > a,
.nav-item > a.is-current {
  color: #FFFFFF;
  border-bottom-color: var(--accent);
}

.header-feedback {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.72);
  padding: 6px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.35);
  white-space: nowrap;
}

.header-feedback:hover,
.header-feedback:focus-visible {
  color: #FFFFFF;
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  background-color: transparent;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #FFFFFF;
}

.mobile-nav {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  background-color: var(--ink);
}

.mobile-nav-list {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px var(--gutter) 16px;
}

.mobile-nav-list li + li {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.mobile-nav-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
}

.mobile-nav-list a:hover,
.mobile-nav-list a:focus-visible {
  color: #FFFFFF;
}

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

.home-main {
  display: block;
}

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

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 0;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line);
}

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

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

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

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

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

.inner-main > .breadcrumb {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

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

.inner-main > .breadcrumb a:hover,
.inner-main > .breadcrumb a:focus-visible {
  color: var(--accent);
}

.page-header {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter) 0;
}

.page-title {
  font-size: 32px;
  line-height: 1.28;
  color: var(--ink);
}

.page-layout {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

.layout-shell {
  padding-top: 8px;
}

.site-footer {
  background-color: var(--ink);
  color: rgba(255, 255, 255, 0.72);
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px var(--gutter) 32px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
}

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

.footer-brand-name {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 10px;
}

.footer-brand-text {
  font-size: 13px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.62);
}

.footer-title {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-list li + li {
  margin-top: 8px;
}

.footer-list a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  display: inline-block;
  padding: 2px 0;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-bottom p {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

/* --------------------------------------------------------------------------
   components：通用组件
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn-primary {
  background-color: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #BF4623;
  border-color: #BF4623;
  color: #FFFFFF;
}

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

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

.btn-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 4px;
  font-size: 15px;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

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

.section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px var(--gutter) 0;
}

.section-head {
  margin-bottom: 24px;
  max-width: 760px;
}

.section-head h2 {
  font-size: 22px;
  line-height: 1.4;
}

.section-lead {
  margin-top: 10px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

.section-more {
  margin-top: 20px;
  font-size: 15px;
}

.section-more a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.section-more a:hover,
.section-more a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 折叠问答 */
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 48px;
  padding: 10px 0;
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex: none;
  font-size: 20px;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
}

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

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

.faq-answer p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
  max-width: 700px;
}

.faq-answer a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.faq-answer a:hover,
.faq-answer a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 图片容器 */
.hero-visual,
.feature-media,
.channel-figure,
.topic-figure,
.media-figure,
.section-figure,
.section-media,
.faq-figure {
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  background-color: var(--line);
}

.hero-visual img,
.feature-media img,
.channel-figure img,
.topic-figure img,
.media-figure img,
.section-figure img,
.section-media img,
.faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  background-color: var(--panel);
}

/* 提示框 */
.notice-box {
  margin-top: 20px;
  padding: 14px 18px;
  background-color: var(--panel);
  border-left: 3px solid var(--teal);
  border-radius: 0 6px 6px 0;
}

.notice-box p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* 侧栏 */
.page-aside,
.page-sidebar,
.content-aside {
  position: sticky;
  top: 88px;
  min-width: 0;
  font-size: 14px;
}

.aside-block + .aside-block,
.toc-block + .aside-links,
.toc + .aside-links,
.toc + .sidebar-links {
  margin-top: 28px;
}

.aside-title,
.toc-title,
.aside-links-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.toc-list li + li,
.aside-list li + li,
.aside-link-list li + li {
  margin-top: 2px;
}

.toc-list a,
.aside-list a,
.aside-link-list a {
  display: block;
  padding: 6px 0 6px 12px;
  font-size: 14px;
  color: var(--muted);
  border-left: 2px solid transparent;
  line-height: 1.6;
}

.toc-list a:hover,
.toc-list a:focus-visible,
.aside-list a:hover,
.aside-list a:focus-visible,
.aside-link-list a:hover,
.aside-link-list a:focus-visible {
  color: var(--ink);
  border-left-color: var(--accent);
}

/* 回到顶部 */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background-color: var(--panel);
  color: var(--ink);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  z-index: 50;
}

.back-to-top::before {
  content: "↑";
}

.back-to-top:hover,
.back-to-top:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */

.hero {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 40px;
  align-items: center;
}

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

.hero-eyebrow {
  font-size: 13px;
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-text h1 {
  font-size: 40px;
  line-height: 1.25;
  color: var(--ink);
}

.hero-lead {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.hero-tags li {
  padding: 4px 12px;
  font-size: 13px;
  color: var(--teal);
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.hero-visual {
  width: 100%;
  aspect-ratio: 4 / 3;
}

/* 三类入口带 */
.entry-band {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 0.55fr;
  gap: 16px;
}

.entry-band-item {
  padding: 20px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.entry-band-primary {
  border-left: 3px solid var(--accent);
}

.entry-band-secondary {
  border-left: 3px solid var(--teal);
}

.entry-band-tertiary {
  background-color: transparent;
}

.entry-band-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 8px;
}

.entry-band-title {
  font-size: 18px;
  line-height: 1.4;
}

.entry-band-title a {
  color: var(--ink);
}

.entry-band-title a:hover,
.entry-band-title a:focus-visible {
  color: var(--accent);
}

.entry-band-desc {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  flex: 1 1 auto;
}

.entry-band-link {
  margin-top: 12px;
  font-size: 14px;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.entry-band-link:hover,
.entry-band-link:focus-visible {
  color: var(--accent);
}

/* 频道分类总览 */
.channel-overview .channel-list {
  border-top: 1px solid var(--line);
}

.channel-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 200px) minmax(0, 1fr) 96px;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.channel-row .channel-no {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.channel-row .channel-name {
  font-size: 17px;
  line-height: 1.5;
}

.channel-row .channel-name a {
  color: var(--ink);
}

.channel-row .channel-name a:hover,
.channel-row .channel-name a:focus-visible {
  color: var(--accent);
}

.channel-row .channel-scope {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.channel-row .channel-enter {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 44px;
  font-size: 14px;
  color: var(--teal);
  white-space: nowrap;
}

.channel-row .channel-enter:hover,
.channel-row .channel-enter:focus-visible {
  color: var(--accent);
}

/* 精选专题索引 */
.topic-rows {
  border-top: 1px solid var(--line);
}

.topic-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0 20px 12px;
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  transition: border-left-color 160ms ease;
}

.topic-row:hover {
  border-left-color: var(--accent);
}

.topic-row-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.topic-row-cat {
  font-weight: 700;
  color: var(--teal);
}

.topic-row-main {
  min-width: 0;
}

.topic-row-title {
  font-size: 18px;
  line-height: 1.45;
}

.topic-row-title a {
  color: var(--ink);
}

.topic-row-title a:hover,
.topic-row-title a:focus-visible {
  color: var(--accent);
}

.topic-row-note {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 精选专题详情 */
.feature-block {
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.feature-media {
  border-radius: 0;
  aspect-ratio: 16 / 7;
}

.feature-body {
  padding: 26px 28px 30px;
  max-width: 820px;
}

.feature-title {
  font-size: 20px;
  line-height: 1.4;
}

.feature-body .feature-text {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.feature-points {
  margin-top: 16px;
}

.feature-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.feature-points li + li {
  margin-top: 8px;
}

.feature-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--teal);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 16px;
  font-size: 15px;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.feature-link:hover,
.feature-link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 观看四步流程 */
.watch-steps .step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.watch-steps .step-item {
  padding: 20px 20px 24px 0;
  border-right: 1px solid var(--line);
  min-width: 0;
}

.watch-steps .step-item:last-child {
  border-right: 0;
}

.watch-steps .step-item + .step-item {
  padding-left: 20px;
}

.watch-steps .step-no {
  display: block;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  margin-bottom: 12px;
}

.watch-steps .step-title {
  font-size: 17px;
  line-height: 1.45;
}

.watch-steps .step-text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 入口核验清单 */
.check-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
  gap: 32px;
  align-items: start;
}

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

.check-item {
  position: relative;
  padding: 14px 0 14px 30px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.check-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 14px;
  height: 14px;
  border: 1px solid var(--teal);
  border-radius: 3px;
}

.check-aside {
  padding: 22px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.check-aside-title {
  font-size: 17px;
  line-height: 1.45;
}

.check-aside-text {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.check-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 12px;
  font-size: 15px;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.check-link:hover,
.check-link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 首页常见问题摘要 */
.faq-brief .faq-list {
  border-top: 1px solid var(--line);
}

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

.faq-more {
  margin-top: 20px;
  font-size: 15px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.faq-more a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.faq-more a:hover,
.faq-more a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.faq-divider {
  color: var(--line);
}

/* --------------------------------------------------------------------------
   pages：内页通用区块
   -------------------------------------------------------------------------- */

.page-head,
.page-title-block,
.page-title-section,
section.page-title {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter) 0;
}

.page-layout .page-head,
.page-layout .page-title-block,
.page-layout .page-title-section,
.page-layout section.page-title {
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

.page-head-inner,
.page-title-inner {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 760px;
}

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

.section-basis,
.section-channels,
.section-mapping,
.section-advice,
.content-section,
.guide-steps,
.guide-devices,
.guide-display,
.guide-notes,
.faq-group {
  padding: 32px 0 0;
  margin-top: 32px;
  border-top: 1px solid var(--line);
}

.page-layout .section-basis:first-of-type,
.page-layout .content-section:first-of-type,
.page-layout .guide-steps:first-of-type,
.page-layout .faq-group:first-of-type {
  margin-top: 20px;
}

.section-basis h2,
.section-channels h2,
.section-mapping h2,
.section-advice h2,
.content-section h2,
.guide-steps h2,
.guide-devices h2,
.guide-display h2,
.guide-notes h2,
.faq-group h2 {
  font-size: 22px;
  line-height: 1.4;
  margin-bottom: 12px;
}

.section-basis p,
.section-channels > p,
.section-mapping > p,
.section-advice > p,
.content-section > p,
.guide-notes > p,
.faq-group .section-intro,
.section-intro {
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 760px;
  margin-bottom: 12px;
}

.section-tail {
  margin-top: 18px;
  font-size: 15px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.section-tail a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.section-tail a:hover,
.section-tail a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 频道划分依据 / 要点 */
.basis-points {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.basis-point {
  padding: 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}

.basis-point h3 {
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 8px;
}

.basis-point p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 频道索引（内页） */
.section-channels .channel-figure {
  margin: 20px 0 8px;
  aspect-ratio: 16 / 7;
  width: 100%;
}

.section-channels .channel-list {
  margin-top: 12px;
  border-top: 1px solid var(--line);
}

.channel-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.channel-num {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

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

.channel-body .channel-name {
  font-size: 18px;
  line-height: 1.45;
  margin-bottom: 6px;
}

.channel-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 720px;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 6px;
  font-size: 14px;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.channel-link:hover,
.channel-link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 表格 */
.mapping-table,
.data-table {
  margin-top: 16px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  font-size: 14px;
}

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

.mapping-table th,
.mapping-table td,
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  border-bottom: 1px solid var(--line);
}

.mapping-table thead th,
.data-table thead th {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background-color: var(--paper);
  white-space: nowrap;
}

.mapping-table tbody th,
.data-table tbody th {
  font-family: var(--sans);
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

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

.mapping-table td a,
.data-table td a {
  color: var(--teal);
}

.mapping-table td a:hover,
.data-table td a:hover,
.mapping-table td a:focus-visible,
.data-table td a:focus-visible {
  color: var(--accent);
}

/* 频道选择建议 */
.advice-list {
  margin-top: 16px;
}

.advice-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.advice-item h3 {
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 6px;
}

.advice-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 720px;
}

/* 专题构成要素 */
.feature-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-item {
  padding: 16px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: 6px;
  min-width: 0;
}

.feature-item .feature-name {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 6px;
}

.feature-item .feature-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 专题大条目 */
.topic-detail {
  margin-top: 24px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.topic-detail .topic-figure {
  border-radius: 0;
  aspect-ratio: 16 / 6;
}

.topic-body {
  padding: 22px 24px 26px;
  max-width: 820px;
}

.topic-name {
  font-size: 20px;
  line-height: 1.4;
}

.topic-desc {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.topic-points {
  margin-top: 14px;
}

.topic-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.topic-points li + li {
  margin-top: 6px;
}

.topic-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--teal);
}

.topic-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 14px;
  font-size: 15px;
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.topic-link:hover,
.topic-link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 片单阅读顺序 */
.order-list {
  margin-top: 16px;
}

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

.order-num {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

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

.order-title {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 4px;
}

.order-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 归档导航 */
.archive-columns {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

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

.archive-quarter {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.archive-list li + li {
  margin-top: 6px;
}

.archive-list a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  display: inline-block;
  padding: 2px 0;
}

.archive-list a:hover,
.archive-list a:focus-visible {
  color: var(--accent);
}

/* 相关页面指路 */
.related-note {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 760px;
}

.related-note a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.related-note a:hover,
.related-note a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.related-links,
.related-nav {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-size: 14px;
}

.related-links-label {
  color: var(--muted);
}

.related-links-item {
  color: var(--teal);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.related-links-item:hover,
.related-links-item:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.related-text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 760px;
}

.related-text a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
  display: inline-block;
  min-height: 32px;
}

.related-text a:hover,
.related-text a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 观看指南：步骤 */
.steps-figure {
  margin: 16px 0 8px;
}

.steps-figure .media-figure {
  aspect-ratio: 16 / 7;
  width: 100%;
}

.steps-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
}

.steps-list .step-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
  min-width: 0;
}

.steps-list .step-num {
  grid-row: 1 / span 2;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.steps-list .step-title {
  font-size: 17px;
  line-height: 1.45;
}

.steps-list .step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 观看指南：设备清单 */
.checklist {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
}

.checklist-item {
  position: relative;
  padding: 16px 0 16px 28px;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.checklist-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 14px;
  height: 14px;
  border: 1px solid var(--teal);
  border-radius: 3px;
}

.checklist-title {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 4px;
}

.checklist-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 观看指南：显示异常 */
.display-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.display-item {
  padding: 16px 18px;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: 0 6px 6px 0;
  min-width: 0;
}

.display-title {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 6px;
}

.display-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.guide-display .section-intro a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.guide-display .section-intro a:hover,
.guide-display .section-intro a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 入口核验：示意图 */
.section-figure {
  margin: 16px 0 8px;
  aspect-ratio: 16 / 7;
  width: 100%;
}

/* 入口核验：三步顺序 */
#order .step-list {
  margin-top: 8px;
}

#order .step-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

#order .step-index {
  grid-row: 1 / span 2;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

#order .step-title {
  font-size: 17px;
  line-height: 1.45;
}

#order .step-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 入口核验：原因列表 */
.cause-list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.cause-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.cause-name {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 4px;
}

.cause-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 720px;
}

.note-inline {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  padding: 12px 16px;
  border-left: 3px solid var(--teal);
  background-color: var(--panel);
}

/* 入口核验：记录要素 */
.record-list {
  margin-top: 16px;
}

.record-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.record-name {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 4px;
}

.record-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 720px;
}

.content-section > p a,
#record > p a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.content-section > p a:hover,
.content-section > p a:focus-visible,
#record > p a:hover,
#record > p a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.page-next {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--muted);
}

.page-next a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.page-next a:hover,
.page-next a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 常见问题页 */
.faq-figure {
  margin: 20px 0 0;
  aspect-ratio: 16 / 6;
  width: 100%;
}

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

.faq-group .faq-item:first-of-type {
  border-top: 1px solid var(--line);
}

/* 未解决时怎么办 */
.path-list {
  margin-top: 16px;
}

.path-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.path-item h3 {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 4px;
}

.path-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.path-item p a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.path-item p a:hover,
.path-item p a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 问题反馈页 */
.section-media {
  margin: 16px 0 8px;
  aspect-ratio: 16 / 7;
  width: 100%;
}

.scope-list {
  margin-top: 12px;
}

.scope-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.scope-name {
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 6px;
}

.scope-define {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 720px;
}

.scope-example {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  padding-left: 12px;
  border-left: 2px solid var(--line);
  max-width: 720px;
}

.element-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
}

.element-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.element-name {
  font-size: 16px;
  line-height: 1.45;
  margin-bottom: 4px;
}

.element-tip {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.selfcheck-list {
  margin-top: 16px;
}

.selfcheck-item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.selfcheck-num {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}

.selfcheck-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.selfcheck-item p a {
  color: var(--teal);
  border-bottom: 1px solid var(--line);
}

.selfcheck-item p a:hover,
.selfcheck-item p a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.process-list {
  margin-top: 16px;
}

.process-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.process-num {
  grid-row: 1 / span 2;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}

.process-name {
  font-size: 16px;
  line-height: 1.45;
}

.process-step p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.process-note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  padding: 12px 16px;
  border-left: 3px solid var(--teal);
  background-color: var(--panel);
}

/* --------------------------------------------------------------------------
   pages：404
   -------------------------------------------------------------------------- */

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

.error-panel {
  max-width: 720px;
  margin: 0 auto;
  padding: 72px var(--gutter) 96px;
}

.error-code {
  font-family: var(--serif);
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.error-title {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 560px;
}

.error-paths {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.error-paths li {
  border-bottom: 1px solid var(--line);
}

.error-paths a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 15px;
  color: var(--teal);
}

.error-paths a:hover,
.error-paths a:focus-visible {
  color: var(--accent);
}

.error-hint {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.error-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1200px) {
  .hero-inner {
    gap: 32px;
  }

  .entry-band {
    grid-template-columns: 1.4fr 1fr 0.7fr;
  }

  .archive-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .header-feedback {
    margin-left: 0;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .page-aside,
  .page-sidebar,
  .content-aside {
    position: static;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  }

  .hero-text h1 {
    font-size: 34px;
  }

  .check-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

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

@media (max-width: 768px) {
  .header-inner {
    min-height: 58px;
    gap: 12px;
  }

  .brand {
    font-size: 18px;
  }

  .hero {
    padding-top: 28px;
  }

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

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

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

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

  .entry-band-item {
    padding: 16px 18px;
  }

  .channel-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 4px 14px;
    padding: 16px 0;
  }

  .channel-row .channel-no {
    grid-row: 1 / span 2;
    font-size: 20px;
  }

  .channel-row .channel-scope {
    grid-column: 2;
  }

  .channel-row .channel-enter {
    grid-column: 2;
    justify-self: start;
  }

  .topic-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding-left: 10px;
  }

  .topic-row-meta {
    flex-direction: row;
    gap: 12px;
  }

  .feature-body {
    padding: 20px 18px 24px;
  }

  .watch-steps .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .watch-steps .step-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 16px 16px 18px 0;
  }

  .watch-steps .step-item + .step-item {
    padding-left: 16px;
  }

  .watch-steps .step-item:nth-child(odd) {
    padding-left: 0;
    border-right: 1px solid var(--line);
  }

  .watch-steps .step-item:nth-child(even) {
    padding-left: 16px;
  }

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

  .steps-list,
  .checklist,
  .display-grid,
  .element-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .mapping-table,
  .data-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .archive-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .section {
    padding-top: 36px;
  }

  .section-head h2,
  .section-basis h2,
  .section-channels h2,
  .section-mapping h2,
  .section-advice h2,
  .content-section h2,
  .guide-steps h2,
  .guide-devices h2,
  .guide-display h2,
  .guide-notes h2,
  .faq-group h2 {
    font-size: 20px;
  }

  .page-title {
    font-size: 25px;
  }

  .page-layout {
    padding-bottom: 48px;
  }

  .error-panel {
    padding: 56px var(--gutter) 72px;
  }

  .error-code {
    font-size: 44px;
  }

  .error-title {
    font-size: 25px;
  }

  .back-to-top {
    right: 14px;
    bottom: 16px;
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 20px;
  }

  body {
    font-size: 15px;
    line-height: 1.8;
  }

  .header-inner {
    gap: 10px;
  }

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

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

  .hero-actions .btn {
    flex: 1 1 100%;
  }

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

  .watch-steps .step-item,
  .watch-steps .step-item + .step-item,
  .watch-steps .step-item:nth-child(odd),
  .watch-steps .step-item:nth-child(even) {
    padding-left: 0;
    padding-right: 0;
    border-right: 0;
  }

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

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 36px;
  }

  .footer-brand {
    grid-column: auto;
  }

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

  .channel-num {
    font-size: 20px;
  }

  .steps-list .step-item,
  #order .step-item,
  .process-step,
  .selfcheck-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .steps-list .step-num,
  #order .step-index,
  .process-num {
    font-size: 22px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  a,
  .topic-row,
  .btn {
    transition: none;
  }
}