/* ==========================================================================
   91平台 · 视频频道导航与专题片单说明站
   样式分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base
   -------------------------------------------------------------------------- */

:root {
  --c-bg: #F7F5F0;
  --c-panel: #FDFCF9;
  --c-ink: #1E2422;
  --c-muted: #5A625E;
  --c-heading: #3F5B4E;
  --c-accent: #B4643C;
  --c-line: #C9D2C6;
  --c-alt: #6E7FA0;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", "SF Mono", Menlo, Consolas, "Liberation Mono",
    "Courier New", monospace;

  --w-page: 1120px;
  --w-read: 720px;
  --w-aside: 260px;

  --header-h: 64px;
  --radius: 6px;
  --radius-sm: 4px;
}

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

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

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--c-heading);
  line-height: 1.4;
}

p {
  margin: 0 0 0.9em;
}

p:last-child {
  margin-bottom: 0;
}

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

a {
  color: var(--c-heading);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--c-alt);
}

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

code,
.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.sr-only,
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   2. layout · 全站骨架
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--c-panel);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  max-width: var(--w-page);
  height: var(--header-h);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

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

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--c-muted);
  white-space: nowrap;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: transparent;
  transition: background 0.18s ease;
}

.nav-link:hover {
  color: var(--c-ink);
}

.nav-link.is-current {
  color: var(--c-ink);
  font-weight: 600;
}

.nav-link.is-current::after {
  background: var(--c-accent);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-panel);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--c-muted);
}

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

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

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

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

.page-header {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  line-height: 1.35;
  font-weight: 600;
  color: var(--c-ink);
  max-width: 22em;
}

.section-title {
  font-size: 22px;
  color: var(--c-heading);
  margin-bottom: 10px;
}

.sub-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-heading);
  margin-bottom: 10px;
}

.section-intro,
.section-desc,
.section-sub {
  font-size: 15px;
  color: var(--c-muted);
  max-width: 46em;
  margin-bottom: 20px;
}

.section-sub {
  margin-top: -4px;
}

/* --------------------------------------------------------------------------
   3. components · 通用组件
   -------------------------------------------------------------------------- */

/* 文本链接 */
.text-link {
  display: inline-block;
  font-size: 15px;
  color: var(--c-accent);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.text-link::after {
  content: " →";
  font-size: 13px;
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: var(--c-accent);
  color: #FDFCF9;
  border-color: var(--c-accent);
}

.btn-primary:hover {
  background: #9E5533;
  border-color: #9E5533;
  color: #FDFCF9;
}

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

.btn-ghost:hover {
  border-color: var(--c-heading);
  color: var(--c-ink);
}

/* 状态标签 */
.status-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: var(--c-line);
  color: var(--c-heading);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  white-space: nowrap;
}

.status-tag.status-done {
  background: #DCE4D8;
  color: #3F5B4E;
}

.status-tag.status-doing {
  background: #F0DED2;
  color: #8C4A29;
}

.status-tag.status-todo {
  background: #E4E7EC;
  color: #5A625E;
}

.status-tag.status-current {
  background: #F0DED2;
  color: #8C4A29;
}

/* 标注字段标签 */
.label-row,
.label-grid,
.label-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.label-item,
.label-tag {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-panel);
  font-size: 13px;
  line-height: 1.6;
}

.label-name {
  color: var(--c-muted);
}

.label-value,
.label-tag .mono {
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

/* 步骤进度（首页三步） */
.step-track {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin: 20px 0;
}

.step-node {
  flex: 1 1 0;
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-panel);
}

.step-connector {
  flex: 0 0 24px;
  align-self: center;
  height: 1px;
  background: var(--c-line);
}

.step-track .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-bottom: 8px;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-muted);
}

.step-track .step-title {
  font-size: 16px;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.step-track .step-state {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-muted);
}

.step-track .step-node.is-done {
  border-color: var(--c-line);
}

.step-track .step-node.is-done .step-num {
  background: var(--c-line);
  color: var(--c-heading);
  border-color: var(--c-line);
}

.step-track .step-node.is-current {
  border-color: var(--c-accent);
}

.step-track .step-node.is-current .step-num {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #FDFCF9;
}

.step-track .step-node.is-current .step-state {
  color: var(--c-accent);
}

/* 折叠说明块 */
.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-panel);
  margin-bottom: 10px;
}

.faq-item summary {
  display: block;
  padding: 14px 18px;
  min-height: 48px;
  font-size: 16px;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-muted);
}

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

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

.faq-answer {
  padding: 0 18px 16px;
  font-size: 15px;
  color: var(--c-muted);
  border-top: 1px solid var(--c-line);
  padding-top: 14px;
}

/* 相关内容 */
.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
}

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

.related-links-item {
  color: var(--c-heading);
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 1px;
}

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

/* 下一步入口 */
.next-step {
  margin-top: 40px;
  padding: 24px 0 0;
  border-top: 1px solid var(--c-line);
}

.next-title {
  font-size: 18px;
  color: var(--c-heading);
  margin-bottom: 8px;
}

.next-desc,
.next-text,
.next-step-text {
  font-size: 15px;
  color: var(--c-muted);
  margin-bottom: 12px;
}

.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 15px;
}

.next-step-link {
  margin: 0;
}

.next-step-link a,
.next-step-link .text-link {
  display: inline-block;
  font-size: 15px;
  color: var(--c-accent);
}

/* 页脚 */
.site-footer {
  background: var(--c-heading);
  color: #E7EBE6;
}

.footer-inner {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px 40px;
}

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

.footer-brand-name {
  font-size: 17px;
  font-weight: 600;
  color: #FDFCF9;
  margin-bottom: 10px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.75;
  color: #C7D2C9;
  max-width: 26em;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: #FDFCF9;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links li {
  min-width: 0;
}

.footer-links a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.7;
  color: #C7D2C9;
  padding: 2px 0;
}

.footer-links a:hover {
  color: #FDFCF9;
}

.footer-bottom {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid rgba(201, 210, 198, 0.28);
}

.footer-bottom p {
  font-size: 13px;
  line-height: 1.7;
  color: #B4C1B6;
  margin: 0;
}

/* --------------------------------------------------------------------------
   4. pages · 首页
   -------------------------------------------------------------------------- */

.home-main {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.home-main section {
  padding: 40px 0;
  border-top: 1px solid var(--c-line);
}

.home-main section:first-child {
  padding-top: 32px;
  border-top: 0;
}

/* 首屏 */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr) minmax(0, 0.95fr);
  gap: 28px;
  align-items: start;
}

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

.hero-summary h1 {
  font-size: 32px;
  line-height: 1.35;
  color: var(--c-ink);
  margin-bottom: 12px;
}

.hero-lead {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.conclusion-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.conclusion-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--c-line);
}

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

.conclusion-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-accent);
  padding-top: 3px;
}

.conclusion-item p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-ink);
  margin: 0;
}

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

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

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

.hero-visual figcaption {
  font-size: 12.5px;
  color: var(--c-muted);
}

.hero-chart {
  min-width: 0;
  padding: 16px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.chart-title {
  font-size: 15px;
  color: var(--c-heading);
  margin-bottom: 12px;
}

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

.chart-row {
  display: grid;
  grid-template-columns: 4px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.chart-bar {
  display: block;
  width: 4px;
  height: 18px;
  background: var(--c-alt);
  border-radius: 1px;
}

.chart-row:nth-child(1) .chart-bar { background: var(--c-heading); }
.chart-row:nth-child(2) .chart-bar { background: #7E9A86; }
.chart-row:nth-child(3) .chart-bar { background: var(--c-alt); }
.chart-row:nth-child(4) .chart-bar { background: var(--c-accent); }
.chart-row:nth-child(5) .chart-bar { background: #A8B0A4; }

.chart-name {
  color: var(--c-ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
}

.chart-source {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* 编辑精读 */
.editorial-article {
  display: block;
}

.editorial-figure {
  margin-bottom: 20px;
}

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

.editorial-body {
  max-width: var(--w-read);
}

.editorial-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-ink);
  margin-bottom: 14px;
}

.editorial-body p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-muted);
}

.editorial-more {
  margin-top: 16px;
}

/* 频道用途速览 */
.channel-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.channel-row {
  display: grid;
  grid-template-columns: 4px 96px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
}

.channel-row:first-child {
  border-top: 1px solid var(--c-line);
}

.channel-bar {
  display: block;
  width: 4px;
  height: 32px;
  background: var(--c-heading);
  border-radius: 1px;
  transition: width 0.18s ease;
}

.channel-row:nth-child(1) .channel-bar { background: var(--c-heading); }
.channel-row:nth-child(2) .channel-bar { background: #7E9A86; }
.channel-row:nth-child(3) .channel-bar { background: var(--c-alt); }
.channel-row:nth-child(4) .channel-bar { background: var(--c-accent); }
.channel-row:nth-child(5) .channel-bar { background: #A8B0A4; }

.channel-row:hover {
  background: rgba(201, 210, 198, 0.18);
}

.channel-row:hover .channel-bar {
  width: 5px;
}

.channel-thumb {
  width: 96px;
  height: 64px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

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

.channel-name {
  font-size: 17px;
  color: var(--c-ink);
  margin-bottom: 4px;
}

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

.channel-name a:hover {
  color: var(--c-accent);
}

.channel-text p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
  margin: 0;
}

/* 任务进度 */
.task-progress-more {
  margin-top: 16px;
}

/* 标注标签样本 */
.label-sample-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.label-demo,
.label-note {
  min-width: 0;
}

.label-demo .label-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 0;
}

.label-demo .label-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 8px 12px;
}

.label-note p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.label-note-more {
  margin-top: 12px;
}

/* 最近整理批次 */
.log-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.log-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-line);
}

.log-row:first-child {
  border-top: 1px solid var(--c-line);
}

.log-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.log-batch {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--c-heading);
}

.log-scope {
  font-size: 13px;
  color: var(--c-muted);
}

.log-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  margin: 0;
}

.recent-log-more {
  margin-top: 16px;
}

/* 按任务分流的下一步入口 */
.next-tasks-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.next-task {
  min-width: 0;
  padding: 20px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.next-task-title {
  font-size: 16px;
  color: var(--c-heading);
  margin-bottom: 8px;
}

.next-task p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
  margin-bottom: 12px;
}

/* --------------------------------------------------------------------------
   5. pages · 内页通用
   -------------------------------------------------------------------------- */

.page-heading,
.page-head,
.page-title-block,
.page-hero {
  margin-bottom: 32px;
}

.page-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-ink);
  max-width: 46em;
  margin-bottom: 12px;
}

.page-lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-ink);
  max-width: 46em;
  margin-bottom: 12px;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13px;
  color: var(--c-muted);
  margin: 0;
}

.page-meta .meta-item {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  min-width: 0;
}

.page-meta dt {
  color: var(--c-muted);
}

.page-meta dd {
  margin: 0;
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

.page-meta .meta-item {
  display: inline-flex;
  gap: 6px;
}

.field-code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  padding: 1px 6px;
  background: var(--c-line);
  border-radius: var(--radius-sm);
}

/* 内页两栏布局 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--w-aside);
  gap: 40px;
  align-items: start;
}

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

.layout-aside {
  min-width: 0;
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.inner-main > .page-layout,
.layout-shell > .page-layout {
  display: grid;
}

/* --------------------------------------------------------------------------
   6. pages · 频道分类
   -------------------------------------------------------------------------- */

.filter-bar {
  margin-bottom: 32px;
  padding: 18px 20px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.filter-group {
  min-width: 0;
  flex: 1 1 200px;
}

.filter-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-muted);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-option {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 4px 12px;
  font-size: 13px;
  color: var(--c-ink);
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.filter-option:hover {
  border-color: var(--c-heading);
  color: var(--c-heading);
}

.filter-option.is-active {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: #FBF1EA;
}

.filter-hint {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  font-size: 13px;
  color: var(--c-muted);
}

.channel-catalog {
  margin-bottom: 32px;
}

.channel-catalog .section-intro a {
  color: var(--c-accent);
  border-bottom: 1px solid var(--c-line);
}

.channel-block {
  padding: 24px 0;
  border-top: 1px solid var(--c-line);
}

.channel-block:first-of-type {
  border-top: 1px solid var(--c-line);
}

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

.channel-swatch {
  flex: 0 0 auto;
  display: block;
  width: 4px;
  height: 26px;
  border-radius: 1px;
  background: var(--c-heading);
}

.channel-swatch.swatch-1 { background: var(--c-heading); }
.channel-swatch.swatch-2 { background: #7E9A86; }
.channel-swatch.swatch-3 { background: var(--c-alt); }
.channel-swatch.swatch-4 { background: var(--c-accent); }
.channel-swatch.swatch-5 { background: #A8B0A4; }

.channel-head-text {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
}

.channel-head-text .channel-name {
  font-size: 18px;
  margin: 0;
}

.channel-purpose {
  font-size: 13.5px;
  color: var(--c-muted);
  margin: 0;
}

.channel-status {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-muted);
  padding: 2px 8px;
  background: var(--c-line);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.channel-figure {
  margin-bottom: 14px;
}

.channel-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

.entry-list {
  display: flex;
  flex-direction: column;
}

.entry-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr) minmax(0, 1.1fr);
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--c-line);
  font-size: 14px;
  align-items: baseline;
}

.entry-row:last-child {
  border-bottom: 0;
}

.entry-name {
  color: var(--c-ink);
  font-weight: 500;
  min-width: 0;
}

.entry-desc {
  color: var(--c-muted);
  min-width: 0;
}

.entry-fields {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-heading);
  min-width: 0;
}

.catalog-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
  font-size: 13.5px;
  color: var(--c-muted);
}

.aside-block {
  padding: 18px 20px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.aside-title {
  font-size: 15px;
  color: var(--c-heading);
  margin-bottom: 10px;
}

.aside-block p {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.aside-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  margin: 10px 0;
  word-break: break-all;
}

.aside-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.aside-list a,
.aside-link {
  font-size: 13.5px;
  color: var(--c-accent);
}

/* --------------------------------------------------------------------------
   7. pages · 专题片单
   -------------------------------------------------------------------------- */

.features-index {
  margin-bottom: 40px;
}

.topic-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.table-caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  color: var(--c-muted);
  padding-bottom: 8px;
}

.topic-table thead th {
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-heading);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.topic-table tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--c-line);
  vertical-align: top;
  color: var(--c-ink);
}

.topic-row:hover {
  background: rgba(201, 210, 198, 0.18);
}

.topic-name a {
  color: var(--c-ink);
  font-weight: 500;
}

.topic-name a:hover {
  color: var(--c-accent);
}

.topic-compose code,
.topic-duration code,
.topic-batch code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-heading);
  background: var(--c-line);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.feature-detail {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.feature-figure {
  margin-bottom: 20px;
}

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

.figure-caption {
  font-size: 13px;
  color: var(--c-muted);
}

.feature-body {
  max-width: var(--w-read);
}

.feature-body p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-muted);
}

.feature-body .sub-title {
  margin-top: 24px;
}

.order-list {
  counter-reset: order;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.order-list li {
  counter-increment: order;
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-ink);
}

.order-list li::before {
  content: counter(order, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-accent);
  letter-spacing: 0.02em;
}

.feature-batches {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.batch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  align-items: start;
}

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

.batch-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.batch-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--c-line);
}

.batch-item:first-child {
  border-top: 1px solid var(--c-line);
}

.batch-head {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--c-heading);
  margin-bottom: 4px;
}

.batch-note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
  margin: 0;
}

/* --------------------------------------------------------------------------
   8. pages · 观看指引
   -------------------------------------------------------------------------- */

.steps-nav {
  margin-bottom: 40px;
}

.steps-nav .step-track {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.steps-nav .step-node {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  min-width: 0;
}

.steps-nav .step-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-muted);
}

.steps-nav .step-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink);
  line-height: 1.5;
}

.steps-nav .step-state {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-muted);
}

.steps-nav .step-node.is-done {
  border-color: var(--c-line);
}

.steps-nav .step-node.is-done .step-index {
  color: var(--c-heading);
}

.steps-nav .step-node.is-current {
  border-color: var(--c-accent);
  background: #FBF1EA;
}

.steps-nav .step-node.is-current .step-index,
.steps-nav .step-node.is-current .step-state {
  color: var(--c-accent);
}

.steps-nav .step-node.is-current .step-name {
  color: var(--c-accent);
}

.steps-body {
  margin-bottom: 40px;
}

.step-block {
  padding: 24px 0;
  border-top: 1px solid var(--c-line);
  max-width: var(--w-read);
}

.step-block:last-child {
  border-bottom: 1px solid var(--c-line);
}

.step-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-bottom: 12px;
}

.step-head .step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-line);
  color: var(--c-heading);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.step-block .step-title {
  font-size: 18px;
  color: var(--c-ink);
  margin: 0;
}

.step-head .step-state {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-muted);
  padding: 1px 8px;
  background: var(--c-line);
  border-radius: var(--radius-sm);
  margin-left: auto;
}

.step-text {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 14px;
}

.step-figure {
  margin: 16px 0;
}

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

.step-criteria {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.step-criteria li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-ink);
}

.step-criteria li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-heading);
}

.step-tip {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
  padding: 10px 14px;
  background: var(--c-panel);
  border-left: 3px solid var(--c-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0;
}

.faq-block {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

/* --------------------------------------------------------------------------
   9. pages · 入口核验
   -------------------------------------------------------------------------- */

.check-section {
  margin-bottom: 40px;
}

.check-section h2,
.anomaly-section h2,
.feedback-section h2 {
  font-size: 22px;
  color: var(--c-heading);
  margin-bottom: 10px;
}

.check-figure {
  margin: 16px 0 20px;
}

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

.check-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.check-table thead th {
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-heading);
  letter-spacing: 0.02em;
}

.check-table tbody th {
  text-align: left;
  font-weight: 500;
  color: var(--c-ink);
  padding: 12px;
  border-bottom: 1px solid var(--c-line);
  vertical-align: top;
  width: 34%;
}

.check-table tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-muted);
  vertical-align: top;
}

.check-table tbody tr:hover {
  background: rgba(201, 210, 198, 0.18);
}

.anomaly-section {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.anomaly-list {
  counter-reset: anomaly;
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 16px;
}

.anomaly-item {
  counter-increment: anomaly;
  position: relative;
  padding: 16px 0 16px 44px;
  border-bottom: 1px solid var(--c-line);
}

.anomaly-item::before {
  content: counter(anomaly, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent);
  letter-spacing: 0.02em;
}

.anomaly-item h3 {
  font-size: 16px;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.anomaly-item p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-muted);
  margin: 0;
}

.feedback-section {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.feedback-body {
  max-width: var(--w-read);
}

.feedback-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
}

.feedback-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 12px;
}

.feedback-links a {
  font-size: 14.5px;
  color: var(--c-accent);
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 1px;
}

.feedback-links a:hover {
  color: var(--c-alt);
  border-bottom-color: var(--c-alt);
}

/* --------------------------------------------------------------------------
   10. pages · 整理日志
   -------------------------------------------------------------------------- */

.log-timeline.log-list,
.log-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 40px;
}

.log-item {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--c-line);
}

.log-item:first-child {
  border-top: 1px solid var(--c-line);
}

.log-item .log-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.log-item .log-batch {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--c-heading);
  margin: 0;
}

.log-item .log-batch .mono {
  font-size: 13px;
}

.log-item .log-scope {
  font-size: 13px;
  color: var(--c-muted);
  margin: 0;
}

.log-item .log-status {
  margin: 0;
}

.log-item .log-desc {
  min-width: 0;
}

.log-item .log-desc p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  margin: 0;
}

.log-detail {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.log-figure {
  margin: 16px 0 24px;
}

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

.log-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  align-items: start;
}

.log-detail-col {
  min-width: 0;
}

.detail-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.detail-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-ink);
}

.detail-list li:first-child {
  border-top: 1px solid var(--c-line);
}

.log-pending {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

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

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

.pending-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-heading);
  margin-bottom: 6px;
}

.pending-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
  margin: 0;
}

/* --------------------------------------------------------------------------
   11. pages · 标签说明
   -------------------------------------------------------------------------- */

.labels-table-section {
  margin-bottom: 40px;
}

.table-wrap {
  width: 100%;
  margin-bottom: 16px;
}

.labels-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.labels-table thead th {
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-heading);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.labels-table tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-ink);
  vertical-align: top;
}

.labels-table tbody td:first-child {
  font-weight: 500;
  white-space: nowrap;
}

.labels-table tbody td .field-value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--c-heading);
  background: var(--c-line);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.labels-table tbody tr:hover {
  background: rgba(201, 210, 198, 0.18);
}

.source-note {
  font-size: 13px;
  color: var(--c-muted);
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
}

.labels-example-section {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.labels-example-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  margin-top: 16px;
}

.labels-figure {
  min-width: 0;
}

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

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

.labels-order h3 {
  font-size: 16px;
  color: var(--c-heading);
  margin-bottom: 10px;
}

.labels-order .order-list li {
  font-size: 14.5px;
}

.order-step {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-accent);
  letter-spacing: 0.02em;
}

.order-text {
  color: var(--c-ink);
}

.labels-adjust-section {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
  max-width: var(--w-read);
}

.labels-adjust-section p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 12px;
}

.inline-links a {
  font-size: 14.5px;
  color: var(--c-accent);
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 1px;
}

.inline-links a:hover {
  color: var(--c-alt);
  border-bottom-color: var(--c-alt);
}

.next-step-section {
  margin-bottom: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.next-step-section h2 {
  font-size: 22px;
  color: var(--c-heading);
  margin-bottom: 10px;
}

.next-step-section p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   12. pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.error-block {
  max-width: 640px;
  margin-bottom: 56px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-accent);
  margin-bottom: 12px;
}

.error-block h1 {
  font-size: 32px;
  line-height: 1.35;
  color: var(--c-ink);
  margin-bottom: 14px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.error-hints {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
}

.error-hints li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-ink);
}

.error-hints li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-heading);
}

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

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--c-line);
  color: var(--c-heading);
  background: transparent;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.error-btn:hover {
  border-color: var(--c-heading);
  color: var(--c-ink);
}

.error-btn-primary {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #FDFCF9;
}

.error-btn-primary:hover {
  background: #9E5533;
  border-color: #9E5533;
  color: #FDFCF9;
}

.error-next {
  padding-top: 32px;
  border-top: 1px solid var(--c-line);
}

.error-next h2 {
  font-size: 22px;
  color: var(--c-heading);
  margin-bottom: 10px;
}

.error-next p {
  font-size: 15px;
  color: var(--c-muted);
  margin-bottom: 16px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.error-links a {
  font-size: 15px;
  color: var(--c-accent);
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 1px;
}

.error-links a:hover {
  color: var(--c-alt);
  border-bottom-color: var(--c-alt);
}

/* --------------------------------------------------------------------------
   13. responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .hero-chart {
    grid-column: 1 / -1;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 32px;
  }

  .steps-nav .step-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr;
  }

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

@media (max-width: 900px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .layout-aside {
    position: static;
  }

  .label-sample-cols,
  .labels-example-grid,
  .log-detail-grid,
  .batch-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }
}

@media (max-width: 760px) {
  :root {
    --header-h: 56px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: block;
    background: var(--c-panel);
    border-bottom: 1px solid var(--c-line);
    padding: 8px 16px 16px;
    box-shadow: 0 8px 20px rgba(30, 36, 34, 0.06);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    display: none;
  }

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

  .nav-list li {
    border-bottom: 1px solid var(--c-line);
  }

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

  .nav-link {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 0 4px;
    font-size: 16px;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link.is-current {
    color: var(--c-accent);
  }

  .inner-main,
  .home-main {
    padding: 0 16px 56px;
  }

  .breadcrumb {
    padding-top: 16px;
    font-size: 12.5px;
  }

  .page-header {
    padding: 14px 0 16px;
    margin-bottom: 24px;
  }

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

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

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

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

  .hero-chart {
    grid-column: auto;
  }

  .channel-row {
    grid-template-columns: 4px 72px minmax(0, 1fr);
    gap: 12px;
  }

  .channel-thumb {
    width: 72px;
    height: 52px;
  }

  .step-track {
    flex-direction: column;
    gap: 10px;
  }

  .step-connector {
    display: none;
  }

  .step-node {
    flex: 1 1 auto;
  }

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

  .log-row,
  .log-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .next-tasks-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .entry-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    padding: 10px 0;
  }

  .entry-fields {
    color: var(--c-muted);
  }

  .filter-row {
    flex-direction: column;
    gap: 16px;
  }

  .steps-nav .step-track {
    display: flex;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .steps-nav .step-node {
    flex: 0 0 152px;
  }

  .topic-table,
  .check-table,
  .labels-table {
    display: block;
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
  }

  .topic-table thead,
  .check-table thead,
  .labels-table thead {
    display: none;
  }

  .topic-table tbody,
  .check-table tbody,
  .labels-table tbody {
    display: block;
  }

  .topic-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--c-line);
    white-space: normal;
  }

  .topic-row td {
    padding: 0;
    border-bottom: 0;
  }

  .topic-row .topic-name {
    grid-column: 1 / -1;
    font-size: 16px;
  }

  .topic-row .topic-compose {
    grid-column: 1 / -1;
    color: var(--c-muted);
    font-size: 13.5px;
  }

  .check-table tbody tr {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--c-line);
    white-space: normal;
  }

  .check-table tbody th,
  .check-table tbody td {
    display: block;
    width: auto;
    padding: 0;
    border-bottom: 0;
  }

  .check-table tbody th {
    font-size: 15.5px;
    margin-bottom: 4px;
  }

  .check-table tbody td {
    font-size: 14px;
  }

  .labels-table tbody tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 12px 0;
    border-bottom: 1px solid var(--c-line);
    white-space: normal;
  }

  .labels-table tbody td {
    display: block;
    padding: 0;
    border-bottom: 0;
  }

  .labels-table tbody td:first-child {
    font-size: 15.5px;
    color: var(--c-heading);
  }

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

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 36px 16px 24px;
    gap: 28px 24px;
  }

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

  .footer-bottom {
    padding: 14px 16px 24px;
  }

  .error-main {
    padding: 40px 16px 56px;
  }

  .error-block h1 {
    font-size: 26px;
  }
}

@media (max-width: 520px) {
  .hero-summary h1 {
    font-size: 24px;
  }

  .page-title {
    font-size: 23px;
  }

  .editorial-body,
  .feature-body,
  .step-block,
  .feedback-body,
  .labels-adjust-section {
    max-width: none;
  }

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

  .channel-row {
    grid-template-columns: 4px minmax(0, 1fr);
    row-gap: 8px;
  }

  .channel-row .channel-thumb {
    grid-column: 2;
    width: 100%;
    height: 132px;
  }

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

  .channel-row .channel-bar {
    grid-row: 1 / span 2;
    height: 100%;
    min-height: 32px;
  }

  .filter-option {
    min-height: 36px;
  }

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

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

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

  .step-head .step-state {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}