/* ==========================================================================
   91制作厂 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */
:root {
  --ink: #0E1A20;
  --ink-soft: #24343C;
  --paper: #F4EFE6;
  --paper-white: #FFFFFF;
  --orange: #B63A1B;
  --teal: #2F5D62;
  --line: #C9D6DF;
  --muted: #5C6B73;
  --serif: "Songti SC", "SimSun", "Noto Serif SC", Georgia, serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: 1120px;
  --gap: 24px;
  --radius: 6px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.25;
  margin: 0 0 0.5em;
  overflow-wrap: break-word;
}

p {
  margin: 0 0 1em;
}

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

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

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

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

figure {
  margin: 0;
}

figcaption {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
  padding: 10px 12px;
  background: var(--paper-white);
  border-top: 1px solid var(--line);
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

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

.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;
}

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

.site-header {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  z-index: 40;
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  font-family: var(--serif);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--paper);
  white-space: nowrap;
  flex: 0 0 auto;
}

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

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

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

.primary-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: #D7E0E5;
  font-size: 0.9375rem;
}

.primary-nav a:hover {
  color: #FFFFFF;
}

.primary-nav a.is-current {
  color: var(--orange);
  font-weight: 600;
}

.menu-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  border: 1px solid #3A4A52;
  border-radius: var(--radius);
  background: transparent;
  color: var(--paper);
  font-size: 1.25rem;
  line-height: 1;
  align-items: center;
  justify-content: center;
}

.mobile-menu {
  background: var(--ink-soft);
  border-top: 1px solid #33444C;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu ul {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px 16px;
}

.mobile-menu li {
  border-bottom: 1px solid #35474F;
}

.mobile-menu li:last-child {
  border-bottom: 0;
}

.mobile-menu a {
  display: flex;
  align-items: center;
  min-height: 44px;
  color: #E4EAEE;
  font-size: 0.9375rem;
}

.mobile-menu a.is-current {
  color: var(--orange);
  font-weight: 600;
}

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

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 64px;
  min-width: 0;
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 24px 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

.inner-main .breadcrumb {
  padding-left: 0;
  padding-right: 0;
  padding-top: 18px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  padding: 22px 0 0;
}

.page-title {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.15;
  margin: 0;
  color: var(--ink);
}

section.page-title {
  padding: 14px 0 0;
}

.page-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 0 20px;
}

.rule-line,
.title-rule,
.rule {
  margin-bottom: 34px;
}

/* 页脚 */
.site-footer {
  flex-shrink: 0;
  background: var(--ink);
  color: #C6D2D8;
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.3fr;
  gap: 32px;
}

.footer-col h2 {
  font-family: var(--sans);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: #93A5AE;
  font-weight: 600;
  margin: 0 0 14px;
}

.footer-logo {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 10px;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #AEBCC4;
  margin: 0 0 14px;
}

.footer-brand a {
  font-size: 0.875rem;
  color: #E4EAEE;
  border-bottom: 1px solid #4A5C65;
  padding-bottom: 2px;
}

.footer-brand a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.footer-col ul li {
  margin-bottom: 4px;
}

.footer-col ul a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 0.875rem;
  color: #C6D2D8;
}

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

.footer-declare p {
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #AEBCC4;
  margin: 0 0 12px;
}

.footer-copy {
  color: #8496A0;
  border-top: 1px solid #2C3B43;
  padding-top: 12px;
}

/* 回到顶部 */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  background: var(--orange);
  color: #FFFFFF;
  font-size: 1.125rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(14, 26, 32, 0.28);
  z-index: 50;
}

.back-to-top[hidden] {
  display: none;
}

.back-to-top:hover {
  background: #9C2F14;
}

/* --------------------------------------------------------------------------
   components · 通用组件
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

.btn-primary:hover {
  background: #9C2F14;
  color: #FFFFFF;
}

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

.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
}

/* 通用章节标题 */
.section-head {
  margin-bottom: 26px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 0 0 8px;
}

.section-sub {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0;
  max-width: 68ch;
}

.section-foot {
  margin: 22px 0 0;
  font-size: 0.9375rem;
}

.section-foot a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

.section-note,
.section-intro {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 72ch;
}

/* 图片容器 */
.figure-media,
.playlist-media,
.guide-media,
.intro-media,
.impact-media,
.boundary-media,
.four-step-media figure,
.submit-media figure {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 100%;
}

.figure-media img,
.playlist-media img,
.guide-media img,
.intro-media img,
.impact-media img,
.boundary-media img,
.four-step-media img,
.submit-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

/* 编号步骤（内页通用） */
.step-num,
.step-no,
.step-index,
.scope-num,
.prep-index,
.up-no,
.channel-no,
.pl-no,
.cell-day,
.item-date,
.col-code,
.cell-no,
.error-code {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--orange);
  font-weight: 700;
}

/* 首页相关链接条（限定作用域，避免污染内页列表） */
.home-main .related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.related-links-label {
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.related-links-item {
  font-size: 0.875rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.home-main .related-links {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 8px;
}

/* 影像型首屏 */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
  padding-top: 56px;
  padding-bottom: 64px;
}

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

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--orange);
  margin: 0 0 14px;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.8vw, 3.8rem);
  line-height: 1.15;
  margin: 0 0 20px;
  max-width: 14ch;
}

.hero-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 26px;
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

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

.hero-tags li {
  font-size: 0.8125rem;
  color: var(--teal);
  background: #E6EDEE;
  border: 1px solid #CFDCDD;
  border-radius: 999px;
  padding: 5px 14px;
}

.hero-media {
  min-width: 0;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* 频道索引带 */
.channel-strip {
  padding-top: 40px;
  padding-bottom: 56px;
  border-top: 1px solid var(--line);
}

.channel-rows {
  border-top: 1px solid var(--ink);
}

.channel-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1.1fr) minmax(0, 1.6fr) minmax(0, 1.3fr) 96px;
  gap: 16px;
  align-items: center;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
}

.channel-name {
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 700;
}

.channel-scope {
  font-size: 0.875rem;
  color: var(--ink-soft);
}

.channel-topic {
  font-size: 0.8125rem;
  color: var(--muted);
}

.channel-link {
  font-size: 0.875rem;
  text-align: right;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  justify-self: end;
}

/* 本周编排 */
.schedule-week {
  padding-top: 40px;
  padding-bottom: 56px;
  border-top: 1px solid var(--line);
}

.schedule-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 40px;
  align-items: start;
}

.col-title,
.column-title {
  font-family: var(--sans);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
  margin: 0 0 14px;
}

.calendar-cells {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.calendar-cell {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.calendar-cells .calendar-cell:last-child {
  grid-column: 1 / -1;
}

.cell-day {
  font-size: 0.8125rem;
}

.cell-theme {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
}

.cell-count {
  font-size: 0.75rem;
  color: var(--muted);
}

.schedule-week .schedule-list {
  border-top: 1px solid var(--ink);
}

.schedule-week .schedule-item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.schedule-week .schedule-item .item-date {
  font-size: 0.8125rem;
  margin: 0;
  grid-row: 1 / 3;
}

.schedule-week .schedule-item .item-name {
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 700;
  min-width: 0;
}

.schedule-week .schedule-item .item-channel {
  font-size: 0.8125rem;
  color: var(--teal);
  margin: 0;
}

.schedule-week .schedule-item .item-desc {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 2px 0 0;
  grid-column: 2 / 3;
}

.schedule-week .schedule-item a {
  font-size: 0.8125rem;
  grid-column: 2 / 3;
  justify-self: start;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

/* 编辑推荐片单 */
.playlist-feature {
  padding-top: 40px;
  padding-bottom: 56px;
  border-top: 1px solid var(--line);
}

.playlist-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.playlist-list {
  border-top: 1px solid var(--ink);
}

.playlist-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1.1fr) minmax(0, 1.6fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 2px;
  border-bottom: 1px solid var(--line);
}

.pl-no {
  font-size: 0.875rem;
}

.pl-name {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
}

.pl-note {
  font-size: 0.8125rem;
  color: var(--muted);
}

.playlist-note-col h3 {
  font-size: 1.125rem;
  margin: 20px 0 8px;
}

.playlist-note-col > p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  margin: 0 0 16px;
}

.playlist-note-col .reading-order {
  list-style: none;
  counter-reset: ro;
  padding: 0;
  margin: 0;
}

.playlist-note-col .reading-order li {
  position: relative;
  counter-increment: ro;
  padding-left: 30px;
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.playlist-note-col .reading-order li::before {
  content: counter(ro);
  position: absolute;
  left: 0;
  top: 1px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--teal);
  color: #FFFFFF;
  font-family: var(--mono);
  font-size: 0.6875rem;
  line-height: 20px;
  text-align: center;
}

/* 观看教程阶梯 */
.guide-steps {
  padding-top: 40px;
  padding-bottom: 56px;
  border-top: 1px solid var(--line);
}

.guide-media {
  max-width: 720px;
  margin-bottom: 30px;
}

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

.guide-steps .step-item {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
  min-width: 0;
}

.guide-steps .step-item .step-no {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.guide-steps .step-item h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.guide-steps .step-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.guide-steps .step-item a {
  font-size: 0.8125rem;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* 使用与许可摘要 */
.license-summary {
  padding-top: 40px;
  padding-bottom: 56px;
  border-top: 1px solid var(--line);
}

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

.license-item {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.license-item h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.license-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 更新记录条 */
.update-strip {
  padding-top: 40px;
  padding-bottom: 56px;
  border-top: 1px solid var(--line);
}

.update-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  border-top: 1px solid var(--ink);
  padding-top: 20px;
}

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

.up-no {
  font-size: 0.8125rem;
}

.up-object {
  font-size: 0.875rem;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 频道索引
   -------------------------------------------------------------------------- */
.filter-bar {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 40px;
}

.filter-title {
  font-family: var(--sans);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
  margin: 0 0 14px;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.filter-tag {
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-soft);
  font-size: 0.875rem;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.filter-tag:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.filter-tag.is-active {
  background: var(--teal);
  border-color: var(--teal);
  color: #FFFFFF;
}

.filter-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.filter-count {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 0;
}

.filter-clear {
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  font-size: 0.8125rem;
}

.filter-clear:hover {
  background: var(--ink);
  color: var(--paper);
}

.filter-restore {
  margin: 14px 0 0;
  font-size: 0.8125rem;
  color: var(--orange);
  background: #FBEDE7;
  border: 1px solid #EBC7B8;
  border-radius: var(--radius);
  padding: 10px 14px;
}

.filter-restore[hidden] {
  display: none;
}

.channel-table {
  margin-bottom: 48px;
  min-width: 0;
}

.channel-table h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

/* 表格：外层可横向滚动，避免撑破视口 */
.channel-table,
.record-table,
.table-scroll {
  max-width: 100%;
}

.channel-table .index-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: var(--paper-white);
  border: 1px solid var(--line);
}

.channel-table .index-table caption {
  text-align: left;
}

.channel-table .index-table th,
.channel-table .index-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}

.channel-table .index-table thead th {
  font-family: var(--sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: #EDE7DC;
  border-bottom: 2px solid var(--ink);
  white-space: nowrap;
}

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

.channel-table .index-table tbody tr:hover {
  background: #FAF7F1;
}

.channel-table .index-table .cell-no {
  font-size: 0.875rem;
  white-space: nowrap;
  width: 64px;
}

.channel-table .index-table .cell-name {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.channel-table .index-table a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

/* 频道范围与边界（侧栏在前） */
.split-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: 40px;
  align-items: start;
  margin-bottom: 48px;
}

.split-aside {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
  padding: 22px;
  min-width: 0;
}

.split-aside h2 {
  font-size: 1.25rem;
  margin: 0 0 14px;
}

.split-aside .boundary-list li {
  font-size: 0.875rem;
  color: var(--ink-soft);
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}

.split-aside .boundary-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.split-aside .boundary-list strong {
  display: block;
  color: var(--ink);
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

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

.split-main h3 {
  font-size: 1.125rem;
  margin: 22px 0 8px;
}

.split-main p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

/* 入门到进阶路径 */
.channel-path {
  margin-bottom: 48px;
}

.channel-path h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

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

.channel-path .step-item {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
  min-width: 0;
}

.channel-path .step-item .step-no {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.channel-path .step-item h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.channel-path .step-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 代表专题交叉引用 */
.crossrefs {
  margin-bottom: 40px;
}

.crossrefs h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.crossref-list {
  border-top: 1px solid var(--ink);
}

.crossref-list li {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) 120px;
  gap: 16px;
  align-items: center;
  padding: 14px 2px;
  border-bottom: 1px solid var(--line);
}

.crossref-name {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 700;
}

.crossref-channel {
  font-size: 0.8125rem;
  color: var(--teal);
}

.crossref-list a {
  font-size: 0.8125rem;
  justify-self: end;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

.crossref-more {
  margin: 20px 0 0;
  font-size: 0.9375rem;
}

.crossref-more a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* --------------------------------------------------------------------------
   pages · 专题排期
   -------------------------------------------------------------------------- */
.schedule-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  margin-bottom: 48px;
}

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

.intro-text h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 16px;
}

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

.intro-list li:first-child {
  border-top: 1px solid var(--ink);
}

.intro-list h3 {
  font-size: 1rem;
  margin: 0 0 4px;
}

.intro-list p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

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

/* 日历与列表并列 */
.schedule-board {
  margin-bottom: 48px;
}

.schedule-board h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.board-note {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 72ch;
}

.board-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 40px;
  align-items: start;
}

.calendar-column,
.schedule-list-column {
  min-width: 0;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.calendar-column .calendar-cell {
  width: 100%;
  text-align: left;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 76px;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.calendar-column .calendar-cell:hover {
  background: #FAF3EC;
}

.calendar-column .calendar-cell.is-active {
  background: var(--ink);
  border-color: var(--ink);
  border-left-color: var(--orange);
  color: var(--paper);
}

.calendar-column .calendar-cell.is-active .cell-day,
.calendar-column .calendar-cell.is-active .cell-theme {
  color: var(--paper);
}

.calendar-column .calendar-cell.is-active .cell-meta {
  color: #AEBCC4;
}

.calendar-column .cell-day {
  font-size: 0.8125rem;
}

.calendar-column .cell-theme {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
}

.calendar-column .cell-meta {
  font-size: 0.75rem;
  color: var(--muted);
}

.schedule-list-column .schedule-list {
  border-top: 1px solid var(--ink);
}

.schedule-list-column .schedule-item {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.18s ease;
}

.schedule-list-column .schedule-item.is-active {
  background: #FBF3EC;
  box-shadow: inset 3px 0 0 var(--orange);
  padding-left: 14px;
}

.schedule-list-column .item-date {
  font-size: 0.8125rem;
  margin: 0 0 2px;
}

.schedule-list-column h4 {
  font-family: var(--serif);
  font-size: 1.0625rem;
  margin: 0 0 4px;
}

.schedule-list-column .item-channel {
  font-size: 0.8125rem;
  color: var(--teal);
  margin: 0 0 6px;
}

.schedule-list-column .item-desc {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0 0 6px;
}

.schedule-list-column .item-link {
  margin: 0;
  font-size: 0.8125rem;
}

.schedule-list-column .item-link a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.schedule-empty {
  font-size: 0.875rem;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 14px;
  margin: 16px 0 0;
}

.schedule-empty[hidden] {
  display: none;
}

/* 排期阅读顺序 */
.reading-order {
  margin-bottom: 48px;
}

.reading-order h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.order-lead {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 68ch;
}

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

.order-steps li {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.order-steps .step-num {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.order-steps h3 {
  font-size: 1.0625rem;
  margin: 0 0 6px;
}

.order-steps p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 排期变更说明 */
.change-note {
  margin-bottom: 40px;
}

.change-note h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 22px;
}

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

.change-card {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.change-card h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.change-card p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

.change-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin: 24px 0 0;
  font-size: 0.9375rem;
}

.change-links a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* --------------------------------------------------------------------------
   pages · 更新记录
   -------------------------------------------------------------------------- */
.record-method {
  margin-bottom: 48px;
}

.record-method h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.record-method > p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 72ch;
}

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

.method-list li {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.method-list h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.method-list p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

.record-table {
  margin-bottom: 48px;
  min-width: 0;
}

.record-table h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-white);
  -webkit-overflow-scrolling: touch;
}

.table-scroll table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table-scroll caption {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.table-scroll th,
.table-scroll td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}

.table-scroll thead th {
  font-family: var(--sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: #EDE7DC;
  border-bottom: 2px solid var(--ink);
  white-space: nowrap;
}

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

.table-scroll tbody tr:hover {
  background: #FAF7F1;
}

.table-scroll .col-code {
  font-size: 0.875rem;
  white-space: nowrap;
}

.table-scroll a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

/* 变更影响范围 */
.impact {
  margin-bottom: 48px;
}

.impact h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 22px;
}

.impact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.impact-scope {
  min-width: 0;
}

.impact-scope > p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  margin: 0 0 16px;
}

.impact-list {
  border-top: 1px solid var(--ink);
}

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

.impact-list h3 {
  font-size: 1rem;
  margin: 0 0 4px;
}

.impact-list p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

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

/* 如何阅读记录 */
.reading {
  margin-bottom: 40px;
}

.reading h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.reading > p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 72ch;
}

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

.reading-steps li {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.reading-steps .step-num {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.reading-steps h3 {
  font-size: 1.0625rem;
  margin: 0 0 6px;
}

.reading-steps p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

.reading-tail {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin: 24px 0 0;
  font-size: 0.9375rem;
}

.reading-tail a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* --------------------------------------------------------------------------
   pages · 观看教程
   -------------------------------------------------------------------------- */
.prep-list {
  margin-bottom: 48px;
}

.prep-list h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

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

.prep-item {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.prep-item .prep-index {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.prep-item h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.prep-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 四步浏览法 */
.four-step {
  margin-bottom: 48px;
}

.four-step h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 22px;
}

.four-step-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.four-step-steps {
  min-width: 0;
  display: grid;
  gap: 16px;
}

.four-step-steps .step-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 4px 16px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.four-step-steps .step-index {
  grid-row: 1 / 4;
  font-size: 1.125rem;
}

.four-step-steps h3 {
  grid-column: 2 / 3;
  font-size: 1.0625rem;
  margin: 0;
}

.four-step-steps p {
  grid-column: 2 / 3;
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

.four-step-steps a {
  grid-column: 2 / 3;
  font-size: 0.8125rem;
  font-weight: 600;
  justify-self: start;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.four-step-media {
  min-width: 0;
}

.four-step-media .path-notes {
  margin-top: 20px;
  border-top: 1px solid var(--ink);
}

.path-notes li {
  font-size: 0.875rem;
  color: var(--ink-soft);
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.path-notes strong {
  display: block;
  color: var(--ink);
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

/* 常见问题自查 */
.self-check {
  margin-bottom: 48px;
}

.self-check h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

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

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

.faq-item summary {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 18px 12px 44px;
  position: relative;
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::before {
  content: "+";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  line-height: 20px;
  text-align: center;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--orange);
}

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

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

.faq-body {
  padding: 0 18px 18px 44px;
}

.faq-body p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.faq-body a {
  font-size: 0.875rem;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

/* 进阶阅读入口 */
.advanced {
  margin-bottom: 40px;
}

.advanced h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

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

.advanced-card {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.advanced-card h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.advanced-card p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.advanced-card a {
  font-size: 0.8125rem;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

/* --------------------------------------------------------------------------
   pages · 使用与许可
   -------------------------------------------------------------------------- */
.usage-scope {
  margin-bottom: 48px;
}

.usage-scope h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

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

.scope-item {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.scope-item .scope-num {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.scope-item h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.scope-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 引用与转载边界 */
.reference-boundary {
  margin-bottom: 48px;
}

.reference-boundary h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 22px;
}

.boundary-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

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

.boundary-main .boundary-list {
  border-top: 1px solid var(--ink);
}

.boundary-main .boundary-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.boundary-main .boundary-list h3 {
  font-size: 1rem;
  margin: 0 0 4px;
}

.boundary-main .boundary-list p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

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

/* 内容来源说明 */
.source-note {
  margin-bottom: 48px;
}

.source-note h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

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

.source-list li {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.source-list h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.source-list p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 与纠错说明的关系 */
.correction-link {
  margin-bottom: 48px;
}

.correction-link h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

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

.correction-card {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  padding: 22px;
  min-width: 0;
}

.correction-card h3 {
  font-size: 1.0625rem;
  margin: 0 0 8px;
}

.correction-card p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.correction-card a {
  font-size: 0.875rem;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

/* 相关入口（许可页） */
.related-entry {
  margin-bottom: 40px;
}

.related-entry h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.related-entry .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding: 0;
}

.related-entry .related-links a {
  font-size: 0.9375rem;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* --------------------------------------------------------------------------
   pages · 纠错说明
   -------------------------------------------------------------------------- */
.correction-types {
  margin-bottom: 48px;
}

.correction-types h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.correction-types > p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 72ch;
}

.type-list {
  border-top: 1px solid var(--ink);
}

.type-item {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr);
  gap: 20px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--line);
}

.type-item h3 {
  font-size: 1rem;
  margin: 0;
}

.type-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 提交四项信息（主内容在前，aside 在后） */
.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  margin-bottom: 48px;
}

.submit-fields {
  min-width: 0;
}

.submit-fields h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.submit-fields > p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 20px;
}

.field-list {
  counter-reset: field;
  border-top: 1px solid var(--ink);
}

.field-item {
  position: relative;
  counter-increment: field;
  padding: 16px 0 16px 46px;
  border-bottom: 1px solid var(--line);
}

.field-item::before {
  content: counter(field, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--orange);
}

.field-item h3 {
  font-size: 1rem;
  margin: 0 0 4px;
}

.field-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

.submit-media {
  min-width: 0;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 0 20px;
  overflow: hidden;
}

.submit-media figure {
  border: 0;
  border-radius: 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}

.submit-media h3 {
  font-size: 1.0625rem;
  margin: 0 18px 8px;
}

.submit-media p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0 18px;
}

/* 处理流程 */
.process {
  margin-bottom: 48px;
}

.process h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.process > p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 72ch;
}

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

.process-step {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.process-step .step-num {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.process-step h3 {
  font-size: 1.0625rem;
  margin: 0 0 6px;
}

.process-step p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

/* 不受理范围 */
.not-accepted {
  margin-bottom: 48px;
}

.not-accepted h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

.not-accepted > p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 22px;
  max-width: 72ch;
}

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

.exclude-item {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--muted);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.exclude-item h3 {
  font-size: 1rem;
  margin: 0 0 6px;
}

.exclude-item p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin: 0;
}

.exclude-note {
  font-size: 0.9375rem;
  margin: 22px 0 0;
}

.exclude-note a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* 相关链接（纠错页） */
section.related-links {
  margin-bottom: 40px;
}

section.related-links h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  margin: 0 0 8px;
}

section.related-links > p {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 0 0 18px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.related-list a {
  font-size: 0.9375rem;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px 24px 72px;
}

.error-panel {
  max-width: 640px;
}

.error-code {
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}

.error-panel h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin: 0 0 16px;
}

.error-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 26px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 48px;
}

.error-hints {
  border-top: 1px solid var(--ink);
  padding-top: 24px;
  max-width: 720px;
}

.error-hints h2 {
  font-size: 1.25rem;
  margin: 0 0 14px;
}

.error-hint-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.error-hint-list a {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.error-hint-list span {
  font-size: 0.875rem;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   responsive · 960px
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .header-inner {
    gap: 20px;
  }

  .primary-nav ul {
    gap: 18px;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 32px;
  }

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

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

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding-top: 40px;
    padding-bottom: 48px;
  }

  .hero h1 {
    max-width: none;
  }

  .schedule-grid,
  .playlist-grid,
  .split-block,
  .schedule-intro,
  .board-columns,
  .impact-layout,
  .four-step-layout,
  .boundary-layout,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

  .guide-steps .step-list,
  .channel-path .step-list,
  .update-list,
  .prep-items,
  .method-list,
  .order-steps,
  .change-grid,
  .reading-steps,
  .advanced-links,
  .source-list,
  .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .license-list,
  .scope-list,
  .correction-grid,
  .exclude-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .channel-row {
    grid-template-columns: 44px minmax(0, 1fr) minmax(0, 1.4fr) 90px;
  }

  .channel-topic {
    display: none;
  }

  .crossref-list li {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) 100px;
  }

  .type-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}

/* --------------------------------------------------------------------------
   responsive · 680px
   -------------------------------------------------------------------------- */
@media (max-width: 680px) {
  body {
    font-size: 15.5px;
  }

  .header-inner {
    padding: 0 16px;
    height: 64px;
  }

  .brand {
    font-size: 1.25rem;
  }

  .primary-nav {
    display: none;
  }

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

  .mobile-menu ul {
    padding: 6px 16px 12px;
  }

  .inner-main {
    padding: 0 16px 48px;
  }

  .breadcrumb {
    padding: 14px 16px 0;
  }

  .inner-main .breadcrumb {
    padding-left: 0;
    padding-right: 0;
    padding-top: 14px;
  }

  .home-main section,
  .home-main .related-links {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero {
    padding-top: 32px;
    padding-bottom: 40px;
  }

  .hero h1 {
    font-size: clamp(1.9rem, 8vw, 2.5rem);
  }

  .hero-lead {
    font-size: 1rem;
  }

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

  .page-title {
    font-size: clamp(1.75rem, 7vw, 2.4rem);
  }

  .page-lead {
    font-size: 1rem;
  }

  .rule-line,
  .title-rule,
  .rule {
    margin-bottom: 26px;
  }

  /* 频道索引：纵向条目 */
  .channel-row {
    grid-template-columns: 36px minmax(0, 1fr);
    grid-template-areas:
      "no name"
      "scope scope"
      "topic topic"
      "link link";
    gap: 4px 12px;
    padding: 14px 0;
  }

  .channel-no {
    grid-area: no;
  }

  .channel-name {
    grid-area: name;
  }

  .channel-scope {
    grid-area: scope;
    font-size: 0.875rem;
  }

  .channel-topic {
    display: block;
    grid-area: topic;
    font-size: 0.8125rem;
  }

  .channel-link {
    grid-area: link;
    justify-self: start;
    text-align: left;
    margin-top: 6px;
  }

  /* 日历与列表 */
  .calendar-cells {
    grid-template-columns: minmax(0, 1fr);
  }

  .calendar-cells .calendar-cell:last-child {
    grid-column: auto;
  }

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

  .schedule-week .schedule-item .item-date {
    grid-row: auto;
  }

  .schedule-week .schedule-item .item-desc,
  .schedule-week .schedule-item a {
    grid-column: auto;
  }

  .playlist-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 2px 12px;
  }

  .pl-note {
    grid-column: 2 / 3;
  }

  .guide-steps .step-list,
  .channel-path .step-list,
  .update-list,
  .prep-items,
  .method-list,
  .order-steps,
  .change-grid,
  .reading-steps,
  .advanced-links,
  .source-list,
  .process-steps,
  .license-list,
  .scope-list,
  .correction-grid,
  .exclude-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-media {
    max-width: none;
  }

  /* 频道索引页：表格改为纵向条目，彻底避免横向溢出 */
  .channel-table {
    margin-bottom: 36px;
  }

  .channel-table .index-table {
    display: block;
    width: 100%;
    border: 0;
    background: transparent;
  }

  .channel-table .index-table thead {
    display: none;
  }

  .channel-table .index-table tbody {
    display: block;
    width: 100%;
  }

  .channel-table .index-table tbody tr {
    display: block;
    width: 100%;
    background: var(--paper-white);
    border: 1px solid var(--line);
    border-left: 3px solid var(--orange);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 12px;
  }

  .channel-table .index-table tbody tr:last-child {
    margin-bottom: 0;
  }

  .channel-table .index-table tbody tr:hover {
    background: var(--paper-white);
  }

  .channel-table .index-table tbody th,
  .channel-table .index-table tbody td {
    display: block;
    width: 100%;
    padding: 0;
    border: 0;
    white-space: normal;
  }

  .channel-table .index-table .cell-no {
    width: auto;
    font-size: 0.8125rem;
    margin-bottom: 2px;
  }

  .channel-table .index-table .cell-name {
    font-size: 1.0625rem;
    margin-bottom: 6px;
  }

  .channel-table .index-table tbody td {
    font-size: 0.875rem;
    color: var(--ink-soft);
    margin-bottom: 6px;
  }

  .channel-table .index-table tbody td:last-child {
    margin-bottom: 0;
  }

  .split-aside {
    padding: 18px;
  }

  .crossref-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 14px 0;
  }

  .crossref-list a {
    justify-self: start;
    margin-top: 4px;
  }

  /* 排期日历格 */
  .calendar-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .schedule-list-column .schedule-item.is-active {
    padding-left: 12px;
  }

  .four-step-steps .step-item {
    grid-template-columns: 40px minmax(0, 1fr);
    padding: 16px;
  }

  .four-step-steps .step-index {
    font-size: 1rem;
  }

  .faq-item summary {
    font-size: 1rem;
    padding: 12px 14px 12px 40px;
  }

  .faq-item summary::before {
    left: 14px;
  }

  .faq-body {
    padding: 0 14px 16px 40px;
  }

  .field-item {
    padding-left: 40px;
  }

  .submit-media {
    padding-bottom: 18px;
  }

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

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

  .error-hint-list li {
    flex-direction: column;
    gap: 2px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 36px 16px 28px;
    gap: 26px;
  }

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

  .site-footer {
    margin-top: 48px;
  }

  .back-to-top {
    right: 14px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

/* 程序验收反馈：移动端防溢出 */
@media (max-width: 768px) {
  .site-main,
  .site-main * {
    min-width: 0;
    max-width: 100%;
  }

  .site-main :is(h1, h2, h3, h4, p, a, span) {
    overflow-wrap: anywhere;
  }
}