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

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

:root {
  --paper: #F7F4EE;
  --ink: #1B1917;
  --vermilion: #A83B2B;
  --slate: #46615F;
  --sand: #E3DCCD;
  --warm-gray: #6B6459;
  --rule: #D8D0BF;
  --serif: "Songti SC", "SimSun", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  --mono: "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
}

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

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
  margin: 0;
}

p {
  margin: 0;
}

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

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

a:hover {
  color: var(--vermilion);
}

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

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

figure {
  margin: 0;
}

strong {
  font-weight: 700;
}

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

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--paper);
}

.site-header {
  background-color: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

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

.brand-mark {
  display: inline-block;
  width: 14px;
  height: 14px;
  background-color: var(--vermilion);
}

.brand-name {
  white-space: nowrap;
}

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
}

.nav-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-link:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.nav-link.is-current {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background-color: var(--paper);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--ink);
}

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

.home-main {
  display: block;
}

.inner-main {
  display: block;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--warm-gray);
}

.breadcrumb a {
  color: var(--warm-gray);
  border-bottom: 1px solid transparent;
}

.breadcrumb a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

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

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

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

.page-title {
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
  overflow-wrap: break-word;
}

.page-head {
  padding: 14px 0 22px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 28px;
}

.page-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--warm-gray);
  max-width: 760px;
  margin-top: 12px;
}

.site-footer {
  background-color: var(--paper);
  border-top: 1px solid var(--rule);
  margin-top: 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px 28px;
}

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

.footer-about .brand {
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-gray);
}

.footer-title {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

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

.footer-list a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--warm-gray);
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-list a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid var(--rule);
}

.footer-copy {
  font-size: 13px;
  line-height: 1.7;
  color: var(--warm-gray);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-nav a {
  font-size: 13px;
  line-height: 1.7;
  color: var(--warm-gray);
  border-bottom: 1px solid transparent;
}

.footer-nav a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

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

/* 阅读进度条 */
.reading-progress {
  position: relative;
  height: 2px;
  background-color: var(--sand);
  overflow: hidden;
}

.reading-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background-color: var(--vermilion);
}

.read-progress {
  position: relative;
  height: 2px;
  background-color: var(--sand);
}

/* 跳转链接 */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 30;
  padding: 10px 16px;
  background-color: var(--ink);
  color: var(--paper);
  font-size: 14px;
  border-radius: 4px;
}

.skip-link:focus {
  top: 12px;
  color: var(--paper);
}

/* 期号徽标 */
.issue-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--vermilion);
  line-height: 1.4;
}

.issue-num {
  font-weight: 700;
}

.issue-line {
  display: inline-block;
  width: 32px;
  height: 1px;
  background-color: var(--vermilion);
}

.issue-label {
  color: var(--warm-gray);
}

.issue-mark,
.issue-rule {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--vermilion);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--vermilion);
}

.period-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--vermilion);
  line-height: 1.4;
}

.period-line {
  display: inline-block;
  width: 28px;
  height: 1px;
  background-color: var(--vermilion);
}

.period-label {
  color: var(--vermilion);
  font-weight: 700;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  line-height: 1.4;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background-color: var(--vermilion);
  color: var(--paper);
  border-color: var(--vermilion);
}

.btn-primary:hover {
  background-color: #8E2F21;
  color: var(--paper);
  border-color: #8E2F21;
}

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

.btn-ghost:hover {
  color: var(--vermilion);
  border-color: var(--vermilion);
}

/* 文字链接 */
.text-link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--vermilion);
  border-bottom: 1px solid var(--vermilion);
  padding-bottom: 1px;
}

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

/* 区块标题 */
.section-title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 18px;
}

.section-intro {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
  margin-bottom: 18px;
}

.section-note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-gray);
  margin-bottom: 16px;
}

.section {
  margin-bottom: 40px;
}

/* 标签 */
.tag,
.channel-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--slate);
  border: 1px solid var(--rule);
  border-radius: 3px;
  background-color: transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.tag:hover,
.channel-tag:hover {
  border-color: var(--slate);
  color: var(--slate);
}

/* 图片容器 */
.hero-figure,
.lead-figure,
.check-figure,
.channel-figure,
.feature-cover,
.prep-figure,
.info-figure,
.status-note-media {
  overflow: hidden;
  border: 1px solid var(--rule);
  background-color: var(--sand);
}

.hero-figure img,
.lead-figure img,
.check-figure img,
.channel-figure img,
.feature-cover img,
.prep-figure img,
.info-figure img,
.status-note-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--warm-gray);
  padding: 8px 12px;
  border-top: 1px solid var(--rule);
  background-color: var(--paper);
}

/* 延伸阅读 */
.read-more {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.read-more li {
  padding-left: 16px;
  position: relative;
}

.read-more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background-color: var(--vermilion);
}

.read-more a {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

.read-more a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
  gap: 40px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px 44px;
  border-bottom: 1px solid var(--rule);
}

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

.hero-main h1 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
  margin: 14px 0 16px;
  overflow-wrap: break-word;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--warm-gray);
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 26px;
}

.hero-figure {
  margin-top: 4px;
}

.hero-figure img {
  aspect-ratio: 16 / 9;
  height: auto;
}

.hero-brief {
  min-width: 0;
  padding: 20px 22px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
  align-self: start;
}

.brief-heading {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 14px;
}

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

.brief-item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  column-gap: 10px;
  row-gap: 4px;
  min-width: 0;
}

.brief-num {
  grid-row: 1 / span 2;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--vermilion);
  font-weight: 700;
}

.brief-link {
  font-size: 15px;
  line-height: 1.6;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

.brief-link:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.brief-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--warm-gray);
}

/* 编辑网格 */
.editorial-grid {
  max-width: 1080px;
  margin: 0 auto;
  padding: 44px 24px;
  border-bottom: 1px solid var(--rule);
}

.editorial-body {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
  gap: 40px;
}

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

.lead-figure {
  margin-bottom: 18px;
}

.lead-figure img {
  aspect-ratio: 16 / 9;
  height: auto;
}

.lead-title {
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.4;
  margin: 12px 0 12px;
}

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

.entry-order {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
  margin-bottom: 18px;
}

.lead-story .entry-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.entry-index {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--vermilion);
  font-weight: 700;
  padding-top: 2px;
}

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

.entry-title {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 4px;
}

.entry-title a {
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

.entry-title a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.entry-channel {
  display: inline-block;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--slate);
  margin-bottom: 4px;
}

.entry-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--warm-gray);
}

.brief-list-wrap {
  min-width: 0;
  padding-left: 28px;
  border-left: 1px solid var(--rule);
}

.aside-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink);
  margin-bottom: 14px;
}

.quick-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 16px;
}

.quick-item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  column-gap: 10px;
  row-gap: 3px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  min-width: 0;
}

.quick-num {
  grid-row: 1 / span 2;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--vermilion);
  font-weight: 700;
}

.quick-link {
  font-size: 15px;
  line-height: 1.6;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

.quick-link:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.quick-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--warm-gray);
}

.quick-channel {
  grid-column: 2;
  display: inline-block;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* 频道条带 */
.channel-band {
  max-width: 1080px;
  margin: 0 auto;
  padding: 44px 24px;
  border-bottom: 1px solid var(--rule);
}

.channel-strips {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
  margin-bottom: 18px;
}

.channel-strip {
  min-width: 0;
  padding: 20px 18px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background-color: #FBF9F4;
}

.channel-code {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--vermilion);
  margin-bottom: 8px;
}

.channel-name {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}

.channel-def {
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-gray);
  margin-bottom: 12px;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* 观看准备 */
.prep-section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 44px 24px;
  border-bottom: 1px solid var(--rule);
}

.prep-body {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
  gap: 40px;
}

.prep-steps {
  min-width: 0;
}

.prep-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.prep-step:first-child {
  padding-top: 0;
}

.prep-step .step-num {
  grid-row: 1 / span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--paper);
  background-color: var(--vermilion);
  border-radius: 50%;
}

.prep-step .step-title {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
}

.prep-step .step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.prep-steps .text-link {
  margin-top: 16px;
}

.check-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
  align-self: start;
}

.check-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}

.check-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
  margin-bottom: 16px;
}

.check-card .check-figure {
  margin-bottom: 16px;
}

.check-card .check-figure img {
  aspect-ratio: 4 / 3;
  height: auto;
}

.check-card .btn {
  width: 100%;
}

/* 内容边界 */
.boundary-section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 44px 24px 56px;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.boundary-item {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--rule);
  border-top: 3px solid var(--vermilion);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.boundary-title {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
}

.boundary-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
  margin-bottom: 14px;
}

/* --------------------------------------------------------------------------
   4. pages · 内页共用
   -------------------------------------------------------------------------- */

/* 双栏：主内容 + 侧栏 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-primary,
.layout-main {
  min-width: 0;
}

.page-aside,
.layout-aside {
  min-width: 0;
  padding-left: 28px;
  border-left: 1px solid var(--rule);
}

/* 单栏 */
.page-layout.single-col,
.page-layout.layout-shell {
  display: block;
  max-width: 860px;
  margin: 0 auto;
}

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

/* --------------------------------------------------------------------------
   4. pages · 频道导览
   -------------------------------------------------------------------------- */

.channel-intro p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  margin-bottom: 14px;
  max-width: 760px;
}

.criteria-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
}

.criteria-item {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.criteria-index {
  grid-row: 1 / span 2;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--vermilion);
  font-weight: 700;
  padding-top: 2px;
}

.criteria-name {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
}

.criteria-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.channel-block {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}

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

.channel-block .channel-def {
  min-width: 0;
}

.channel-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--vermilion);
  margin-bottom: 6px;
}

.channel-block .channel-name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
}

.channel-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.channel-block .channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-self: start;
  padding-top: 4px;
}

.channel-figure img {
  aspect-ratio: 16 / 7;
  height: auto;
}

.cross-note > p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  margin-bottom: 16px;
}

.cross-examples {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 16px;
}

.cross-example {
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--slate);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.cross-example-title {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
}

.cross-example p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.cross-tip {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
  padding: 12px 16px;
  border: 1px dashed var(--rule);
  border-radius: 4px;
}

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

.feature-lead {
  margin-bottom: 36px;
}

.feature-cover {
  margin-bottom: 16px;
}

.feature-cover img {
  aspect-ratio: 16 / 9;
  height: auto;
}

.feature-text {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  margin-top: 14px;
}

.entry-order-section {
  margin-bottom: 36px;
}

.entry-order-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.entry-order-item:first-of-type {
  border-top: 1px solid var(--rule);
}

.entry-order-num {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--vermilion);
  font-weight: 700;
  padding-top: 2px;
}

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

.entry-order-title {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 4px;
}

.entry-order-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-gray);
  margin-bottom: 6px;
}

.entry-order-meta {
  display: inline-block;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.archive {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 20px;
}

.archive-item {
  border-bottom: 1px solid var(--rule);
}

.archive-item:first-child {
  border-top: 1px solid var(--rule);
}

.archive-item a {
  display: block;
  padding: 11px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.archive-item a:hover {
  color: var(--vermilion);
}

.aside-note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--warm-gray);
  margin-bottom: 14px;
}

.aside-tip {
  padding: 14px 16px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.aside-tip-title {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 6px;
}

.aside-tip-text {
  font-size: 13px;
  line-height: 1.75;
  color: var(--warm-gray);
}

/* --------------------------------------------------------------------------
   4. pages · 最新条目
   -------------------------------------------------------------------------- */

.status-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 24px;
  padding: 20px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
  margin-bottom: 36px;
  align-items: start;
}

.status-note-media {
  min-width: 0;
}

.status-note-media img {
  aspect-ratio: 4 / 3;
  height: auto;
}

.status-note-body {
  min-width: 0;
}

.status-note-body h2 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}

.status-note-body > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
  margin-bottom: 14px;
}

.status-legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.status-legend li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-gray);
}

.status-legend strong {
  display: inline-block;
  margin-right: 8px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.entry-section {
  margin-bottom: 36px;
}

.entry-section h2,
.rule-section h2,
.archive-entry h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 14px;
}

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

.entry-section .entry-row {
  display: grid;
  grid-template-columns: 48px 84px minmax(0, 1fr) auto;
  column-gap: 14px;
  row-gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}

.entry-no {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--warm-gray);
  font-weight: 700;
}

.entry-issue {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--vermilion);
}

.entry-section .entry-channel {
  grid-column: 3;
  grid-row: 1;
  justify-self: start;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--slate);
  border-bottom: 1px solid transparent;
}

.entry-section .entry-channel:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.entry-section .entry-title {
  grid-column: 1 / span 3;
  grid-row: 2;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin: 0;
}

.entry-section .entry-title a {
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

.entry-section .entry-title a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.entry-summary {
  grid-column: 1 / span 3;
  grid-row: 3;
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-gray);
}

.entry-state {
  grid-column: 4;
  grid-row: 1;
  justify-self: end;
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  border: 1px solid var(--rule);
  border-radius: 3px;
  color: var(--warm-gray);
}

.entry-state.is-new {
  color: var(--vermilion);
  border-color: var(--vermilion);
}

.entry-state.is-revised {
  color: var(--slate);
  border-color: var(--slate);
}

.entry-state.is-archived {
  color: var(--warm-gray);
  border-color: var(--rule);
}

.rule-section {
  margin-bottom: 36px;
}

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

.rule-item {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--rule);
  border-top: 3px solid var(--slate);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.rule-item h3 {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
}

.rule-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.archive-entry {
  margin-bottom: 36px;
}

.archive-entry p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
  margin-bottom: 14px;
}

.archive-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.archive-links a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 4px;
  background-color: #FBF9F4;
}

.archive-links a:hover {
  color: var(--vermilion);
  border-color: var(--vermilion);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.related-links-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--warm-gray);
}

.related-links-item {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

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

/* --------------------------------------------------------------------------
   4. pages · 观看指南
   -------------------------------------------------------------------------- */

.page-primary .prep-section {
  max-width: none;
  margin: 0 0 36px;
  padding: 0;
  border-bottom: 0;
}

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

.prep-figure img {
  aspect-ratio: 16 / 7;
  height: auto;
}

.prep-lead {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.prep-block {
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--slate);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.prep-block h3 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 6px;
}

.prep-block p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.order-section {
  margin-bottom: 36px;
}

.order-section h2,
.precheck-section h2,
.read-more-section h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 16px;
}

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

.step-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.step-item .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--paper);
  background-color: var(--vermilion);
  border-radius: 50%;
}

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

.step-body h3 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 4px;
}

.step-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.precheck-section {
  margin-bottom: 36px;
}

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

.precheck-item {
  padding: 14px 16px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.precheck-item h3 {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 4px;
}

.precheck-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.page-aside h2 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink);
  margin-bottom: 12px;
}

.aside-intro {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
  margin-bottom: 14px;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 18px;
}

.checklist-item {
  position: relative;
  padding: 10px 0 10px 26px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}

.checklist-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 12px;
  height: 12px;
  border: 1px solid var(--slate);
  border-radius: 2px;
}

.page-aside .aside-note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.page-aside .aside-note a {
  color: var(--vermilion);
  border-bottom: 1px solid var(--vermilion);
}

.page-aside .aside-note a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

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

.symptom-section,
.faq-section,
.forward-section {
  margin-bottom: 40px;
}

.symptom-section h2,
.faq-section h2,
.forward-section h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 16px;
}

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

.symptom-item {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--rule);
  border-top: 3px solid var(--vermilion);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.symptom-name {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
}

.symptom-stage {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--slate);
  margin-bottom: 8px;
}

.symptom-hint {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.faq-section .check-figure {
  margin-bottom: 20px;
}

.faq-section .check-figure img {
  aspect-ratio: 16 / 7;
  height: auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
}

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

.faq-question {
  position: relative;
  display: block;
  padding: 15px 40px 15px 0;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -7px;
  border-right: 2px solid var(--vermilion);
  border-bottom: 2px solid var(--vermilion);
  transform: rotate(45deg);
  transition: transform 0.15s ease;
}

.faq-item[open] .faq-question::after {
  margin-top: -2px;
  transform: rotate(-135deg);
}

.faq-question:hover {
  color: var(--vermilion);
}

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

.faq-answer p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--warm-gray);
  margin-bottom: 8px;
}

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

.forward-rule {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.forward-rule li {
  padding: 14px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--vermilion);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.forward-rule a {
  color: var(--vermilion);
  border-bottom: 1px solid var(--vermilion);
}

.forward-rule a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* --------------------------------------------------------------------------
   4. pages · 问题反馈
   -------------------------------------------------------------------------- */

.scope-section,
.info-section,
.process-section {
  margin-bottom: 40px;
}

.page-layout.single-col .precheck-section {
  margin-bottom: 40px;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.scope-in,
.scope-out {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
}

.scope-in {
  border-top: 3px solid var(--slate);
}

.scope-out {
  border-top: 3px solid var(--rule);
}

.scope-heading {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

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

.scope-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background-color: var(--slate);
}

.scope-out .scope-list li::before {
  background-color: var(--warm-gray);
}

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

.info-figure img {
  aspect-ratio: 16 / 7;
  height: auto;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
}

.info-list li {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
}

.info-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
}

.info-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
  min-width: 0;
}

.process-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
}

.process-list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.process-num {
  grid-row: 1 / span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--paper);
  background-color: var(--vermilion);
  border-radius: 50%;
}

.process-name {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
}

.process-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.pre-self-check {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pre-self-check li {
  padding: 12px 16px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.8;
}

.pre-self-check a {
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--slate);
  margin-right: 6px;
}

.pre-self-check a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.pre-self-desc {
  color: var(--warm-gray);
}

.topic-archive-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--rule);
  background-color: #FBF9F4;
  border-radius: 4px;
  margin-bottom: 32px;
}

.topic-archive-note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-gray);
}

.topic-archive-link {
  font-size: 14px;
  line-height: 1.7;
  color: var(--vermilion);
  border-bottom: 1px solid var(--vermilion);
}

.topic-archive-link:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* --------------------------------------------------------------------------
   4. pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 24px 64px;
}

.error-panel {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 32px;
}

.error-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.error-code {
  font-family: var(--mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: var(--vermilion);
}

.error-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--warm-gray);
  padding: 4px 10px;
  border: 1px solid var(--rule);
  border-radius: 3px;
}

.error-panel h1 {
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1.35;
  margin-bottom: 14px;
}

.error-desc {
  font-size: 16px;
  line-height: 1.85;
  color: var(--warm-gray);
  max-width: 620px;
  margin-bottom: 22px;
}

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

.error-guide h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 18px;
}

.error-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--rule);
  margin-bottom: 20px;
}

.error-links li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 13px 0;
  border-bottom: 1px solid var(--rule);
}

.error-links a {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

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

.error-links span {
  font-size: 14px;
  line-height: 1.7;
  color: var(--warm-gray);
}

.error-note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.error-note a {
  color: var(--vermilion);
  border-bottom: 1px solid var(--vermilion);
  margin: 0 2px;
}

.error-note a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* --------------------------------------------------------------------------
   5. responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .header-inner,
  .footer-inner,
  .footer-bottom,
  .hero,
  .editorial-grid,
  .channel-band,
  .prep-section,
  .boundary-section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .inner-main {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 28px;
  }

  .editorial-body,
  .prep-body,
  .page-layout,
  .layout-main-aside {
    grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr);
    gap: 26px;
  }

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

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

  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 24px;
    row-gap: 28px;
  }

  .footer-inner .footer-col:last-child {
    grid-column: 1 / -1;
  }

  .footer-inner .footer-col:last-child .footer-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px 22px;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 16px;
  }

  .brand {
    font-size: 18px;
  }

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

  .site-nav {
    flex: 1 1 100%;
    width: 100%;
    display: block;
    order: 3;
    border-top: 1px solid var(--rule);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 10px;
    width: 100%;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 44px;
    padding: 10px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--rule);
  }

  .nav-link.is-current {
    border-bottom-color: var(--rule);
    color: var(--vermilion);
  }

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

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

  .page-header {
    padding-top: 10px;
  }

  .page-title {
    font-size: 26px;
    line-height: 1.35;
  }

  .page-head {
    padding: 12px 0 18px;
    margin-bottom: 22px;
  }

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

  .hero {
    display: block;
    padding: 26px 16px 32px;
  }

  .hero-main h1 {
    font-size: 26px;
    line-height: 1.35;
    margin: 12px 0 12px;
  }

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

  .hero-actions {
    margin: 18px 0 20px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
    min-width: 0;
  }

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

  .hero-brief {
    margin-top: 24px;
    padding: 16px 16px;
  }

  .editorial-grid,
  .channel-band,
  .prep-section,
  .boundary-section {
    padding: 30px 16px;
  }

  .editorial-body,
  .prep-body,
  .page-layout,
  .layout-main-aside {
    display: block;
  }

  .brief-list-wrap {
    margin-top: 26px;
    padding-left: 0;
    padding-top: 22px;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .check-card {
    margin-top: 24px;
  }

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

  .lead-title {
    font-size: 21px;
  }

  .lead-story .entry-row {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

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

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

  .boundary-grid,
  .rule-grid,
  .symptom-grid,
  .scope-grid,
  .cross-examples {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-aside,
  .layout-aside {
    margin-top: 28px;
    padding-left: 0;
    padding-top: 22px;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .criteria-item {
    grid-template-columns: 46px minmax(0, 1fr);
    column-gap: 12px;
  }

  .channel-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .channel-block .channel-tags {
    padding-top: 0;
  }

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

  .entry-section .entry-row {
    grid-template-columns: 40px minmax(0, 1fr) auto;
    column-gap: 10px;
    row-gap: 4px;
  }

  .entry-section .entry-channel {
    grid-column: 2;
    grid-row: 1;
  }

  .entry-section .entry-title {
    grid-column: 1 / -1;
    grid-row: 2;
    font-size: 17px;
  }

  .entry-summary {
    grid-column: 1 / -1;
    grid-row: 3;
  }

  .entry-state {
    grid-column: 3;
    grid-row: 1;
  }

  .entry-order-item {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 10px;
  }

  .info-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .step-item,
  .process-list li {
    grid-template-columns: 36px minmax(0, 1fr);
    column-gap: 12px;
  }

  .error-main {
    padding: 36px 16px 48px;
  }

  .error-code {
    font-size: 36px;
  }

  .error-panel h1 {
    font-size: 24px;
  }

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

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 30px 16px 22px;
  }

  .footer-inner .footer-col:last-child {
    grid-column: auto;
  }

  .footer-inner .footer-col:last-child .footer-list {
    flex-direction: column;
    gap: 8px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px 24px;
  }

  .footer-nav {
    gap: 14px;
  }

  .footer-nav a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }

  .topic-archive-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}