/* ==========================================================================
   九一传媒制片厂 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base —— 变量、重置、排版基线
   -------------------------------------------------------------------------- */

:root {
  --paper: #F7F4EC;
  --paper-deep: #EFEADF;
  --ink: #1E2328;
  --ink-soft: #3C444B;
  --green: #2F4A3F;
  --green-deep: #24382F;
  --red: #8A3B2E;
  --slate: #5C6B73;
  --line: #D6CFC0;
  --line-strong: #BDB4A1;
  --gold: #B8892D;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", monospace;

  --shell: 1120px;
  --gap: 32px;
  --radius: 6px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.85;
  font-weight: 400;
}

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

p {
  margin: 0;
}

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

a {
  color: var(--red);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration: underline;
}

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

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

figure {
  margin: 0;
}

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

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

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 60;
  padding: 10px 16px;
  background: var(--green);
  color: #fff;
  border-radius: var(--radius);
  font-size: 14px;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: 12px;
  color: #fff;
}

/* --------------------------------------------------------------------------
   2. layout —— 页头、主容器、页脚、内页骨架
   -------------------------------------------------------------------------- */

.site-header {
  background: var(--green);
  color: #F3EFE4;
  border-bottom: 3px solid var(--green-deep);
}

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

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
  color: #F6F2E7;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand-sub {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #C7D2C7;
  white-space: nowrap;
}

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

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 18px;
}

.nav-link {
  display: inline-block;
  padding: 6px 2px;
  font-size: 15px;
  color: #E4E0D3;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.nav-link:hover {
  color: #fff;
  border-bottom-color: #C9B98F;
  text-decoration: none;
}

.nav-link.is-current {
  color: #fff;
  border-bottom-color: var(--gold);
  font-weight: 700;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid #5A7266;
  border-radius: var(--radius);
  background: transparent;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.menu-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: #F3EFE4;
}

.site-main {
  display: block;
}

.home-main {
  padding-bottom: 8px;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 28px 24px 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-family: var(--mono);
  color: var(--slate);
  margin-bottom: 14px;
}

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

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

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

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

.page-header {
  margin-bottom: 18px;
}

.page-title {
  font-size: clamp(2.1rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.22;
  color: var(--ink);
  margin: 0;
}

.page-title-block {
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-title-block .section-no,
.page-title-block .section-index {
  margin-bottom: 8px;
}

.page-lede,
.page-lead,
.page-summary,
.page-description {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.85;
}

.page-description {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
  margin-bottom: 6px;
}

.page-summary {
  margin-top: 10px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(0, 300px);
  gap: var(--gap);
  align-items: start;
}

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(0, 300px);
  gap: var(--gap);
  align-items: start;
}

.content-main,
.main-column {
  min-width: 0;
}

.content-aside,
.side-column {
  min-width: 0;
}

/* 页脚 */
.site-footer {
  background: var(--green);
  color: #E8E4D6;
  margin-top: 40px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

.footer-primary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid #4A6154;
}

.footer-slogan {
  font-size: 17px;
  color: #F3EFE4;
  max-width: 620px;
}

.cta-button {
  display: inline-block;
  padding: 11px 22px;
  background: var(--red);
  color: #FBF7EC;
  border: 1px solid var(--red);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  transition: background 0.16s ease, color 0.16s ease;
}

.cta-button:hover {
  background: #6E2C21;
  border-color: #6E2C21;
  color: #fff;
  text-decoration: none;
}

.footer-cta {
  background: #F3EFE4;
  border-color: #F3EFE4;
  color: var(--green-deep);
}

.footer-cta:hover {
  background: #fff;
  border-color: #fff;
  color: var(--green-deep);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px 28px;
  padding: 26px 0 22px;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #C9B98F;
  margin-bottom: 10px;
}

.footer-col ul {
  display: grid;
  gap: 7px;
}

.footer-col a {
  color: #DCD8CA;
  font-size: 14px;
  line-height: 1.6;
}

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

.footer-note {
  padding-top: 16px;
  border-top: 1px solid #4A6154;
  font-size: 13px;
  line-height: 1.8;
  color: #BFCBBF;
}

.footer-copy {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #9FB0A2;
}

/* 移动端底部快捷导航（统一处理三种类名） */
.mobile-dock,
.mobile-quick-nav,
.mobile-quicknav {
  display: none;
}

/* --------------------------------------------------------------------------
   3. components —— 章节头、表格、卡片、链接、清单、步骤
   -------------------------------------------------------------------------- */

.section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 44px 24px;
  border-top: 1px solid var(--line);
}

.section:first-of-type {
  border-top: 0;
}

.section-head {
  margin-bottom: 22px;
  max-width: 760px;
}

.section-no,
.section-index {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 8px;
}

.section-head h2,
.section h2 {
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  font-weight: 700;
  color: var(--ink);
}

.section-intro,
.section-desc,
.section-lead {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.85;
}

.section-note {
  margin-top: 12px;
  color: var(--slate);
  font-size: 14.5px;
  line-height: 1.8;
}

.section-foot {
  margin-top: 18px;
}

.text-link {
  display: inline-block;
  font-size: 15px;
  color: var(--red);
  border-bottom: 1px solid rgba(138, 59, 46, 0.35);
  padding-bottom: 1px;
  transition: border-color 0.16s ease, color 0.16s ease;
}

.text-link:hover {
  color: #6E2C21;
  border-bottom-color: #6E2C21;
  text-decoration: none;
}

/* 表格 */
.table-wrap,
.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FBF8F1;
}

.data-table {
  width: 100%;
  min-width: 560px;
  font-size: 15px;
  line-height: 1.7;
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px 6px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.data-table thead th {
  text-align: left;
  padding: 11px 14px;
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line-strong);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--green-deep);
  white-space: nowrap;
}

.data-table tbody th {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
  color: var(--ink);
  vertical-align: top;
}

.data-table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  vertical-align: top;
}

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

.data-table tbody tr:hover {
  background: #F4EFE3;
}

.data-table td.mono {
  white-space: nowrap;
  color: var(--slate);
}

.table-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--slate);
}

/* 图注 */
.fig-caption,
figure figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* 图片容器 */
.hero-figure,
.gallery-stage,
.archive-figure,
.channel-figure,
.feature-figure,
.media-figure,
.content-figure,
.section-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FBF8F1;
  padding: 10px;
  overflow: hidden;
}

.hero-figure img,
.gallery-stage img,
.archive-figure img,
.channel-figure img,
.feature-figure img,
.media-figure img,
.content-figure img,
.section-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 4px;
  background: var(--paper-deep);
}

/* 步骤流程（首页 / 供稿 / 观看说明共用，作用域限定） */
.step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.step-item {
  padding: 16px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
}

.section-contribute .step-no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gold);
  margin-bottom: 6px;
}

.section-contribute .step-title,
.content-section .step-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.section-contribute .step-desc,
.content-section .step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   4. pages —— 首页
   -------------------------------------------------------------------------- */

/* 首页首屏 */
.hero-cover {
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 48px 24px 44px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
  gap: 40px;
  align-items: start;
}

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

.issue-no {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}

.hero-text h1 {
  font-size: clamp(2.1rem, 4vw, 3.25rem);
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-lede {
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 620px;
  margin-bottom: 24px;
}

.browse-axis {
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--line-strong);
  padding-top: 18px;
}

.axis-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--line);
}

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

.axis-label {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.axis-link {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--red);
}

.axis-desc {
  grid-column: 2;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.hero-figure {
  margin: 0;
}

/* 本期目录 */
.contents-table {
  min-width: 620px;
}

.contents-table tbody th {
  font-size: 16px;
}

.table-link {
  color: var(--red);
  font-size: 14.5px;
  white-space: nowrap;
}

/* 专题策展选录 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.feature-card {
  display: flex;
  flex-direction: column;
  padding: 20px 20px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
  border-radius: var(--radius);
}

.feature-no {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--gold);
  margin-bottom: 8px;
}

.feature-title {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 10px;
}

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

.feature-title a:hover {
  color: var(--red);
}

.feature-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.feature-meta {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
  margin-bottom: 14px;
}

.feature-card .text-link {
  margin-top: auto;
  align-self: flex-start;
}

/* 作品档案画廊 */
.gallery {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 232px;
  gap: 22px;
  align-items: start;
}

.gallery-stage {
  margin: 0;
}

.gallery-stage img {
  aspect-ratio: 16 / 9;
}

.gallery-thumbs {
  display: grid;
  gap: 10px;
}

.thumb {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 2px 12px;
  align-items: center;
  padding: 8px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: left;
  transition: border-color 0.16s ease, background 0.16s ease;
}

.thumb:hover {
  border-color: var(--line-strong);
  background: #F4EFE3;
}

.thumb img {
  grid-row: 1 / span 2;
  width: 64px;
  height: 44px;
  object-fit: cover;
  border-radius: 3px;
}

.thumb-label {
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink);
}

.thumb-state {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.thumb.is-current {
  border-color: var(--red);
  background: #FBF1EC;
}

.thumb.is-current .thumb-label {
  color: var(--red);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.thumb.is-current .thumb-state {
  color: var(--red);
}

/* 观看说明摘要 */
.check-list {
  display: grid;
  gap: 16px;
  max-width: 860px;
}

.check-item {
  padding: 18px 20px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
}

.check-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.check-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

/* 内容核验 */
.record-table {
  min-width: 540px;
}

/* 供稿与合作流程 */
.section-contribute .step-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* --------------------------------------------------------------------------
   5. pages —— 内页通用模块
   -------------------------------------------------------------------------- */

/* 年份快速索引 */
.year-jump {
  margin-bottom: 26px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

.year-jump-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.year-jump-link {
  display: inline-block;
  padding: 6px 14px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--green-deep);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #FBF8F1;
}

.year-jump-link:hover {
  background: var(--green);
  border-color: var(--green);
  color: #F6F2E7;
  text-decoration: none;
}

/* 作品档案 */
.archive-figure {
  margin-bottom: 26px;
}

.archive-years h2,
.archive-usage h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.75rem);
  margin-bottom: 8px;
}

.year-group {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.year-group-title {
  font-size: 19px;
  color: var(--green-deep);
  margin-bottom: 12px;
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.archive-list {
  display: grid;
  gap: 14px;
}

.archive-item {
  padding: 14px 16px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.archive-no {
  display: block;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--gold);
  margin-bottom: 4px;
}

.archive-item-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.archive-meta {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--slate);
  margin-bottom: 6px;
}

.archive-summary {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.archive-usage {
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.usage-list {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.usage-item {
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
}

.usage-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.usage-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 侧栏区块（作品档案 / 专题 / 观看说明共用） */
.aside-block,
.side-block {
  padding: 18px 18px 16px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.aside-block:last-child,
.side-block:last-child {
  margin-bottom: 0;
}

.aside-block h2,
.side-title {
  font-size: 16.5px;
  color: var(--green-deep);
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.aside-note,
.side-intro {
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
  margin-bottom: 12px;
}

.topic-list {
  display: grid;
  gap: 10px;
}

.topic-item {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

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

.topic-item a {
  font-size: 15px;
  color: var(--red);
}

.topic-range {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate);
}

.featured-list {
  display: grid;
  gap: 12px;
}

.featured-item {
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

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

.featured-item .archive-no {
  margin-bottom: 2px;
}

.featured-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 相关链接（档案 / 频道页的横向条） */
.related-links {
  max-width: var(--shell);
  margin: 34px auto 0;
  padding: 18px 24px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
}

.related-links-label {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.related-links-item {
  font-size: 15px;
  color: var(--red);
}

/* 相关卡片网格（档案 / 供稿 / 核验） */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}

.related-card {
  padding: 16px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-card h3 {
  font-size: 16.5px;
  margin-bottom: 6px;
}

.related-card h3 a {
  color: var(--ink);
}

.related-card h3 a:hover {
  color: var(--red);
}

.related-card p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.related-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.related-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 频道目录页 */
.page-shell {
  display: block;
}

.channel-picker {
  margin-bottom: 26px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.channel-chip {
  display: inline-block;
  padding: 7px 15px;
  font-size: 14.5px;
  color: var(--green-deep);
  background: #FBF8F1;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}

.channel-chip:hover {
  background: var(--green);
  border-color: var(--green);
  color: #F6F2E7;
  text-decoration: none;
}

.section-compare,
.section-diff,
.section-advice,
.section-mapping,
.section-related {
  max-width: none;
  padding: 0;
  border-top: 0;
}

.section-compare {
  margin-bottom: 34px;
}

.section-diff,
.section-advice,
.section-mapping,
.section-related {
  margin-bottom: 32px;
}

.channel-figure {
  margin-bottom: 20px;
  max-width: 760px;
}

.channel-table {
  min-width: 640px;
}

.channel-table tbody th {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--green-deep);
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.diff-card {
  padding: 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
}

.diff-card h3 {
  font-size: 16.5px;
  margin-bottom: 8px;
}

.diff-card p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.diff-footnote {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--slate);
}

.advice-list {
  display: grid;
  gap: 14px;
  counter-reset: advice;
}

.advice-item {
  padding: 16px 18px 16px 52px;
  position: relative;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  counter-increment: advice;
}

.advice-item::before {
  content: counter(advice, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--gold);
}

.advice-item h3 {
  font-size: 16.5px;
  margin-bottom: 6px;
}

.advice-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.mapping-table {
  min-width: 560px;
}

.related-list {
  display: grid;
  gap: 12px;
}

.related-item {
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.related-item a {
  font-size: 16px;
  font-weight: 700;
  color: var(--red);
}

.related-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--red);
}

.related-note {
  margin-top: 4px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 专题策展页 */
.feature-figure {
  margin-bottom: 28px;
}

.feature-catalog,
.feature-notes,
.feature-matrix,
.feature-prep {
  margin-bottom: 34px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.feature-catalog h2,
.feature-notes h2,
.feature-matrix h2,
.feature-prep h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  margin-bottom: 8px;
}

.feature-list {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.feature-item {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
}

.feature-item-head {
  min-width: 0;
}

.feature-name {
  font-size: 17px;
  margin-bottom: 4px;
}

.feature-item .feature-no {
  margin-bottom: 2px;
}

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

.feature-item-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.feature-item-body p + p {
  margin-top: 8px;
}

.feature-item-body .feature-meta {
  margin-bottom: 8px;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 16px;
}

.note-card {
  padding: 16px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.note-card p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.feature-matrix .data-table {
  min-width: 560px;
}

.prep-list {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.prep-item {
  padding: 14px 16px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.prep-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.prep-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.feature-prep .text-link {
  margin-top: 4px;
}

.related-links h2 {
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  margin-bottom: 14px;
}

/* 专题页侧栏 */
.side-list {
  display: grid;
  gap: 10px;
  counter-reset: sidelist;
}

.side-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  counter-increment: sidelist;
}

.side-list li::before {
  content: counter(sidelist, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gold);
}

.side-defs {
  display: grid;
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 观看说明页 */
.content-section {
  margin-bottom: 34px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.content-section h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  margin-bottom: 8px;
}

.content-section .section-intro {
  margin-bottom: 16px;
}

.media-figure {
  margin-bottom: 28px;
}

.checklist {
  display: grid;
  gap: 14px;
}

.checklist-item {
  padding: 15px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
}

.checklist-name {
  font-size: 16.5px;
  margin-bottom: 6px;
}

.checklist-body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.checklist-entry {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--slate);
}

.content-section .step-list {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.step-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gold);
  margin-bottom: 6px;
}

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

.step-content .step-title {
  font-size: 16px;
  margin-bottom: 4px;
}

.step-content .step-body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 10px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FBF8F1;
  padding: 0 18px;
}

.faq-question {
  padding: 14px 26px 14px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 12px;
  font-family: var(--mono);
  font-size: 18px;
  color: var(--red);
}

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

.faq-item[open] .faq-question {
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
}

.faq-answer {
  padding-bottom: 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.faq-answer a {
  color: var(--red);
}

/* 观看说明侧栏 */
.exception-list {
  display: grid;
  gap: 12px;
}

.exception-item {
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.exception-name {
  font-size: 15px;
  margin-bottom: 4px;
}

.exception-body {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.exception-entry {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate);
}

/* 观看说明页底部链接卡片 */
.link-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.link-card {
  padding: 16px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.link-card a {
  font-size: 16px;
  font-weight: 700;
  color: var(--red);
}

.link-card p {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 内容核验页 */
.verification-intro,
.verification-dimensions,
.verification-fields,
.verification-feedback,
.verification-notes {
  margin-bottom: 34px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.verification-intro h2,
.verification-dimensions h2,
.verification-fields h2,
.verification-feedback h2,
.verification-notes h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  margin-bottom: 10px;
}

.verification-intro p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.verification-intro p + p {
  margin-top: 12px;
}

.section-figure {
  margin: 18px 0;
  max-width: 760px;
}

.verification-dimensions .data-table,
.verification-fields .data-table {
  min-width: 600px;
}

.path-list {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.path-item {
  padding: 15px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
}

.path-item h3 {
  font-size: 16.5px;
  margin-bottom: 6px;
}

.path-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.footnote-list {
  display: grid;
  gap: 12px;
  counter-reset: footnote;
}

.footnote-item {
  position: relative;
  padding-left: 34px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  counter-increment: footnote;
}

.footnote-num {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gold);
}

.footnote-item a {
  color: var(--red);
}

.verification-notes + .related-links,
.related-links h2 {
  margin-top: 0;
}

/* 核验页底部相关链接列表 */
.verification-notes ~ .related-links .related-grid {
  margin-top: 14px;
}

/* 供稿与合作页 */
.page-hero {
  margin-bottom: 30px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.page-hero .section-index {
  margin-bottom: 8px;
}

.page-hero .page-lead {
  max-width: 760px;
}

.types-table {
  min-width: 600px;
  margin-top: 16px;
}

.types-table tbody th {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--green-deep);
}

.content-figure {
  margin: 26px 0;
  max-width: 760px;
}

.section-title {
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.section-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gold);
  font-weight: 400;
}

.content-section .section-intro {
  color: var(--ink-soft);
}

.content-section .step-list {
  margin-top: 16px;
}

.output-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 16px;
}

.output-card {
  padding: 16px 18px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
  border-radius: var(--radius);
}

.output-title {
  font-size: 16.5px;
  margin-bottom: 6px;
}

.output-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.output-desc a {
  color: var(--red);
}

/* 供稿页准备清单 */
.content-section .checklist {
  margin-top: 16px;
}

.checklist-label {
  display: block;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
  margin-bottom: 4px;
}

.checklist-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.related-section {
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 0;
}

/* 404 页 */
.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 56px 24px 64px;
}

.error-panel {
  max-width: 720px;
  padding: 32px;
  background: #FBF8F1;
  border: 1px solid var(--line);
  border-top: 3px solid var(--red);
  border-radius: var(--radius);
}

.error-code {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 10px;
}

.error-panel h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  margin-bottom: 14px;
}

.error-text {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.error-text + .error-text {
  margin-top: 8px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin: 22px 0 20px;
}

.error-link {
  font-size: 15px;
  color: var(--red);
  border-bottom: 1px solid rgba(138, 59, 46, 0.35);
}

.error-link:hover {
  text-decoration: none;
  border-bottom-color: var(--red);
}

.error-list {
  display: grid;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.error-list a {
  font-size: 15px;
  color: var(--green-deep);
}

.error-list a:hover {
  color: var(--red);
}

/* --------------------------------------------------------------------------
   6. responsive —— 960 / 720 / 480
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 10px 16px;
    padding: 12px 20px;
  }

  .main-nav {
    flex: 1 1 100%;
    order: 3;
    justify-content: flex-start;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding-top: 8px;
    border-top: 1px solid #4A6154;
  }

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

  .nav-link {
    display: block;
    padding: 11px 4px;
    font-size: 15.5px;
    border-bottom: 1px solid #3D5648;
  }

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

  .menu-toggle {
    display: flex;
    order: 2;
  }

  .brand {
    order: 1;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 20px 34px;
  }

  .hero-figure {
    max-width: 560px;
  }

  .page-layout,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .content-aside,
  .side-column {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    align-items: start;
  }

  .aside-block,
  .side-block {
    margin-bottom: 0;
  }

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

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

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

  .gallery-thumbs {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .feature-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

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

  .inner-main {
    padding: 22px 20px 48px;
  }

  .section {
    padding: 36px 20px;
  }

  .related-links {
    padding: 16px 20px;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
    line-height: 1.8;
  }

  .brand-sub {
    display: none;
  }

  .brand-mark {
    font-size: 19px;
  }

  .hero-inner {
    padding: 28px 16px 30px;
  }

  .hero-text h1 {
    font-size: clamp(1.75rem, 7vw, 2.4rem);
  }

  .hero-lede {
    font-size: 16px;
  }

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

  .axis-desc {
    grid-column: 1;
  }

  .page-title {
    font-size: clamp(1.6rem, 6.4vw, 2.1rem);
  }

  .section {
    padding: 30px 16px;
  }

  .inner-main {
    padding: 18px 16px 44px;
  }

  .feature-grid,
  .diff-grid,
  .notes-grid,
  .output-grid,
  .section-contribute .step-list,
  .content-section .step-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .thumb {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto auto;
    gap: 4px;
  }

  .thumb img {
    grid-row: auto;
    width: 100%;
    height: 76px;
  }

  .footer-inner {
    padding: 30px 16px 24px;
  }

  .footer-primary {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-slogan {
    font-size: 16px;
  }

  .footer-columns {
    gap: 20px;
  }

  .error-panel {
    padding: 22px 18px;
  }

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

  /* 底部快捷导航 */
  .mobile-dock,
  .mobile-quick-nav,
  .mobile-quicknav {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    background: var(--green-deep);
    border-top: 1px solid #4A6154;
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  .mobile-dock ul,
  .mobile-quick-nav ul,
  .mobile-quicknav ul,
  .quick-nav-list,
  .quicknav-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: var(--shell);
    margin: 0 auto;
  }

  .mobile-dock li,
  .mobile-quick-nav li,
  .mobile-quicknav li {
    min-width: 0;
  }

  .dock-link,
  .quick-link,
  .quick-nav-link,
  .quicknav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    min-height: 56px;
    padding: 8px 4px;
    font-size: 13px;
    line-height: 1.35;
    color: #DCD8CA;
    text-align: center;
    word-break: keep-all;
  }

  .dock-link:hover,
  .quick-link:hover,
  .quick-nav-link:hover,
  .quicknav-link:hover {
    color: #fff;
    text-decoration: none;
  }

  .dock-state,
  .quick-current,
  .quicknav-current {
    font-family: var(--mono);
    font-size: 10.5px;
    color: var(--gold);
  }

  .dock-link.is-current,
  .quick-link.is-current,
  .quick-nav-link.is-current,
  .quicknav-link.is-current {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
  }

  .site-footer {
    padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 10px 14px;
  }

  .nav-link {
    font-size: 15px;
  }

  .hero-text h1 {
    font-size: clamp(1.6rem, 7.4vw, 2rem);
  }

  .page-title {
    font-size: clamp(1.5rem, 6.6vw, 1.9rem);
  }

  .section-head h2,
  .section h2,
  .content-section h2,
  .verification-intro h2,
  .verification-dimensions h2,
  .verification-fields h2,
  .verification-feedback h2,
  .verification-notes h2 {
    font-size: 1.3rem;
  }

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

  .thumb {
    grid-template-columns: 64px minmax(0, 1fr);
    grid-template-rows: auto auto;
  }

  .thumb img {
    grid-row: 1 / span 2;
    width: 64px;
    height: 44px;
  }

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

  .data-table {
    font-size: 14px;
  }

  .data-table thead th,
  .data-table tbody th,
  .data-table tbody td {
    padding: 10px 12px;
  }

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

  .cta-button {
    padding: 10px 18px;
    font-size: 14.5px;
  }

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

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}