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

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

:root {
  --paper: #f6f1e7;
  --surface: #fffdf8;
  --ink: #1d1a16;
  --ink-soft: #5c554c;
  --accent: #a8512c;
  --green: #2f4438;
  --copper: #8d857a;
  --line: #c9bfae;
  --line-soft: #ded5c6;
  --font-title: Georgia, "Songti SC", STSong, serif;
  --font-body: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --wrap: 1180px;
  --wrap-pad: 24px;
  --radius: 2px;
}

*,
*::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(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.35;
  color: var(--ink);
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin: 0 0 14px;
}

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

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

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.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;
}

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

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

/* --------------------------------------------------------------------------
   layout · 页头与导航
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--wrap-pad);
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 8px 0;
}

.brand-mark {
  width: 12px;
  height: 22px;
  background-color: var(--accent);
  border-radius: 1px;
}

.brand-name {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  white-space: nowrap;
}

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

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

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

.nav-link {
  position: relative;
  display: inline-block;
  padding: 22px 0 20px;
  font-size: 15px;
  color: var(--ink-soft);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

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

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--ink);
}

/* --------------------------------------------------------------------------
   layout · 主内容容器与内页骨架
   -------------------------------------------------------------------------- */

.site-main {
  display: block;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--wrap-pad);
}

.inner-main {
  padding-bottom: 72px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.breadcrumb a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

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

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

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

.page-header {
  padding: 18px 0 26px;
  border-bottom: 1px solid var(--line-soft);
}

.page-title {
  max-width: 24em;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.28;
  color: var(--ink);
}

.page-hero {
  padding: 30px 0 8px;
}

.page-hero-inner,
.page-hero-text {
  max-width: 780px;
}

.page-index,
.page-eyebrow,
.page-kicker,
.section-index,
.section-eyebrow,
.section-no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.eyebrow-num {
  display: inline-block;
  margin-right: 8px;
}

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

.page-scope-note,
.page-scope,
.page-note,
.scope-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

/* section 通用头部 */

.section {
  padding: 64px 0;
  border-top: 1px solid var(--line-soft);
}

.section-head {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-head h2 {
  margin-bottom: 10px;
}

.section-lead,
.section-intro,
.section-desc,
.section-note {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.section-title {
  margin-bottom: 10px;
}

.section-foot {
  margin-top: 26px;
  font-size: 15px;
}

.narrow {
  max-width: 68ch;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   components · 按钮与文字链接
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 22px;
  font-size: 15px;
  line-height: 1.3;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn-primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #fffaf3;
}

.btn-primary:hover {
  background-color: #8f4325;
  border-color: #8f4325;
  color: #fffaf3;
}

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

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

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.16s ease, gap 0.16s ease;
}

.text-link::after {
  content: "→";
  font-size: 14px;
  transition: transform 0.16s ease;
}

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

.text-link:hover::after {
  transform: translateX(3px);
}

/* 标签 */

.tag,
.status-tag {
  display: inline-block;
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  background-color: transparent;
  white-space: nowrap;
}

.tag-in,
.tag-include,
.tag-required,
.status-included,
.status-tag.tag-required {
  border-color: var(--green);
  color: var(--green);
  background-color: rgba(47, 68, 56, 0.06);
}

.tag-out,
.tag-exclude,
.status-excluded {
  border-color: var(--copper);
  color: var(--ink-soft);
  background-color: rgba(141, 133, 122, 0.08);
}

.tag-supplement,
.tag-optional {
  border-color: var(--accent);
  color: var(--accent);
  background-color: rgba(168, 81, 44, 0.06);
}

/* 图片容器 */

.hero-media,
.craft-figure,
.scenario-figure,
.service-figure,
.content-figure,
.media-figure,
.note-figure,
.faq-figure,
.prep-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--surface);
  padding: 8px;
}

.hero-media img,
.craft-figure img,
.scenario-figure img,
.service-figure img,
.content-figure img,
.media-figure img,
.note-figure img,
.faq-figure img,
.prep-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 1px;
}

/* --------------------------------------------------------------------------
   components · 数据表
   -------------------------------------------------------------------------- */

.data-table,
.version-table {
  width: 100%;
  font-size: 15px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.data-table caption,
.version-table caption {
  text-align: left;
  font-size: 13px;
  color: var(--ink-soft);
  padding: 0 0 8px;
}

.data-table thead th,
.version-table thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  font-weight: 400;
  color: var(--ink-soft);
  background-color: #efe8db;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.data-table tbody td,
.version-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  line-height: 1.7;
}

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

.data-table tbody td:first-child,
.version-table tbody td:first-child {
  font-weight: 600;
  color: var(--ink);
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

.table-note,
.version-note,
.checklist-note {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   components · 折叠问答
   -------------------------------------------------------------------------- */

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

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

.faq-q,
.faq-question {
  position: relative;
  padding: 18px 40px 18px 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-q::after,
.faq-question::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--accent);
}

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

.faq-a,
.faq-answer {
  padding: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.faq-conclusion {
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   components · 相关入口条
   -------------------------------------------------------------------------- */

.related-links,
.related-bar {
  margin-top: 56px;
  padding: 26px 0 0;
  border-top: 1px solid var(--line);
}

.related-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 400;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.related-list,
.related-bar .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
}

.related-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  transition: color 0.16s ease, border-color 0.16s ease;
}

.related-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.related-link .arrow,
.related-link .related-arrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  transition: transform 0.16s ease;
}

.related-link:hover .arrow,
.related-link:hover .related-arrow {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   layout · 页脚
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: 0;
  background-color: #efe8db;
  border-top: 1px solid var(--line);
  color: var(--ink);
}

.footer-top {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--wrap-pad) 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-bottom: 1px solid var(--line);
}

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

.footer-name {
  margin: 0 0 6px;
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.footer-slogan {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
  max-width: 34em;
}

.footer-action {
  flex: 0 0 auto;
}

.footer-links {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 34px var(--wrap-pad);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 40px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 400;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-col a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.footer-col a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--wrap-pad) 40px;
}

.footer-bottom p {
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.home-main {
  padding-bottom: 0;
}

/* 首屏 */

.hero {
  padding: 44px 0 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px;
  align-items: start;
}

.eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.hero-text h1 {
  font-size: clamp(30px, 4.6vw, 46px);
  line-height: 1.24;
  margin-bottom: 18px;
}

.hero-lead {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

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

.hero-panels {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel {
  padding: 20px 22px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel-primary {
  border-left: 3px solid var(--accent);
  padding-top: 24px;
  padding-bottom: 24px;
}

.panel-quiet {
  background-color: transparent;
  border-style: dashed;
}

.panel-no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.panel-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.panel-primary .panel-title {
  font-size: 20px;
}

.panel-desc {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.panel-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.16s ease;
}

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

.panel-link:hover {
  border-bottom-color: var(--accent);
}

/* 首屏主视觉 */

.hero-media {
  margin-top: 40px;
  padding: 10px;
}

.hero-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

/* 站点信息条 */

.info-strip {
  margin-top: 48px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px 32px;
}

.info-title {
  font-size: 15px;
  margin-bottom: 6px;
}

.info-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 服务条目矩阵 */

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.matrix-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.16s ease;
}

.matrix-card:hover {
  border-color: var(--copper);
}

.card-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

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

.card-scope {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 6px;
}

/* 制作过程与编号 */

.process-track {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.process-node {
  padding-right: 8px;
  border-left: 2px solid var(--line-soft);
  padding-left: 16px;
}

.node-no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.node-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.node-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.craft-note {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: center;
  margin-top: 40px;
}

.craft-figure img {
  aspect-ratio: 4 / 3;
}

.craft-copy h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

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

/* 适用场景 */

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

.scenario-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.scenario-title {
  font-size: 18px;
}

.scenario-cond {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.scenario-card .text-link {
  margin-top: auto;
  font-size: 14px;
}

.scenario-figure {
  margin-top: 24px;
}

.scenario-figure img {
  aspect-ratio: 21 / 9;
}

/* 专题解读窄版流 */

.notes-strip .narrow {
  max-width: 68ch;
}

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

.note-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}

.note-no {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.note-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.note-title .text-link {
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  color: var(--ink);
  border-bottom: 1px solid transparent;
}

.note-title .text-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

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

/* 协作流程预览 */

.flow-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.flow-step {
  padding-left: 16px;
  border-left: 2px solid var(--line-soft);
}

.flow-no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.flow-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.flow-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 首页常见问题 */

.faq-strip .narrow {
  max-width: 68ch;
}

/* 合作准备入口条 */

.cta-strip {
  border-top: 1px solid var(--line);
  background-color: #efe8db;
}

.cta-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px var(--wrap-pad);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 40px;
  align-items: center;
}

.cta-main h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.cta-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.cta-tips {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-left: 1px solid var(--line);
  padding-left: 28px;
}

.cta-tips li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.cta-tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background-color: var(--accent);
}

/* --------------------------------------------------------------------------
   pages · 服务目录
   -------------------------------------------------------------------------- */

.page-intro {
  padding: 26px 0 8px;
  max-width: 820px;
}

.scope-compare {
  padding: 34px 0 8px;
}

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

.compare-col {
  padding: 22px 22px 24px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.compare-include {
  border-top: 3px solid var(--green);
}

.compare-exclude {
  border-top: 3px solid var(--copper);
}

.compare-title {
  font-size: 16px;
  margin-bottom: 12px;
}

.compare-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.compare-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.compare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background-color: var(--copper);
}

.compare-include .compare-list li::before {
  background-color: var(--green);
}

.service-list {
  padding: 44px 0 8px;
}

.service-figure {
  margin: 20px 0 26px;
}

.service-figure img {
  aspect-ratio: 21 / 8;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  padding: 22px 22px 24px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.item-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.service-name {
  font-size: 18px;
  margin-bottom: 10px;
}

.service-need,
.service-deliver {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.service-need .label,
.service-deliver .label {
  display: inline-block;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.material-table-section {
  padding: 44px 0 8px;
}

.material-table-section .data-table {
  margin-top: 20px;
}

.combo-section {
  padding: 44px 0 8px;
}

.combo-body {
  margin-top: 18px;
  max-width: 74ch;
}

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

.combo-limits {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
  max-width: 74ch;
}

.combo-limits li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.combo-limits .tag {
  flex: 0 0 auto;
  margin-top: 3px;
}

/* --------------------------------------------------------------------------
   pages · 制作标准
   -------------------------------------------------------------------------- */

.craft-rules {
  padding: 34px 0 0;
}

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

.rule-block {
  padding: 22px 22px 24px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.rule-block-title {
  font-size: 17px;
  margin-bottom: 12px;
}

.rule-list {
  counter-reset: rule;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rule-list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  counter-increment: rule;
}

.rule-list li::before {
  content: counter(rule, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.craft-rules .craft-figure {
  margin-top: 24px;
}

.craft-rules .craft-figure img {
  aspect-ratio: 21 / 9;
}

.craft-editing {
  padding: 44px 0 0;
}

.editing-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.editing-item {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.editing-name {
  font-size: 16px;
}

.editing-do,
.editing-check {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.editing-check {
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  color: var(--ink);
}

.craft-versions {
  padding: 44px 0 0;
}

.craft-versions .version-table {
  margin-top: 20px;
}

.craft-checklist {
  padding: 44px 0 0;
}

.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
  margin-top: 20px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.checklist-box {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  border: 1px solid var(--copper);
  border-radius: 1px;
}

/* --------------------------------------------------------------------------
   pages · 适用场景
   -------------------------------------------------------------------------- */

.scenario-section {
  padding: 34px 0 0;
}

.scenario-section .scenario-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 20px;
}

.scenario-section .scenario-card {
  gap: 8px;
}

.scenario-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.scenario-name {
  font-size: 17px;
}

.scenario-focus,
.scenario-length {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.scenario-length {
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  color: var(--ink);
}

.scenario-conditions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: auto;
  padding-top: 8px;
}

.scenario-conditions li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.scenario-conditions li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 1px;
  background-color: var(--copper);
}

.scenario-figure {
  padding: 34px 0 0;
}

.scenario-figure .content-figure {
  margin-top: 20px;
}

.scenario-figure .content-figure img {
  aspect-ratio: 21 / 8;
}

.scenario-limit {
  padding: 44px 0 0;
}

.limit-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

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

.limit-judge {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
}

.limit-action {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 协作流程
   -------------------------------------------------------------------------- */

.process-steps {
  padding: 34px 0 0;
}

.step-list {
  display: flex;
  flex-direction: column;
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.step-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.step-no {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.step-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.step-action,
.step-node {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 62ch;
}

.step-node {
  color: var(--ink);
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.step-item .status-tag {
  margin-top: 4px;
}

.process-visual {
  padding: 44px 0 0;
}

.process-visual .media-figure {
  margin-top: 20px;
}

.process-visual .media-figure img {
  aspect-ratio: 21 / 8;
}

.cost-factors {
  padding: 44px 0 0;
}

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

.cost-col {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--surface);
}

.cost-in {
  border-top: 3px solid var(--green);
}

.cost-out {
  border-top: 3px solid var(--copper);
}

.cost-col-title {
  font-size: 16px;
  margin-bottom: 12px;
}

.cost-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cost-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.cost-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background-color: var(--copper);
}

.cost-in .cost-list li::before {
  background-color: var(--green);
}

.change-notes {
  padding: 44px 0 0;
}

.change-list {
  display: flex;
  flex-direction: column;
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

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

.change-trigger {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
}

.change-handle {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 专题解读
   -------------------------------------------------------------------------- */

.notes-index {
  padding: 34px 0 0;
}

.notes-index h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.notes-list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.notes-item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.note-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding-top: 4px;
}

.notes-item-body h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.notes-item-body h3 a {
  color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.notes-item-body h3 a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.notes-item-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.note-article {
  max-width: 68ch;
  margin: 52px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.note-article-head {
  margin-bottom: 22px;
}

.note-article-head .note-code {
  display: block;
  margin-bottom: 8px;
  padding-top: 0;
}

.note-article-head h2 {
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.35;
  margin-bottom: 10px;
}

.note-meta {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.note-meta a {
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  transition: color 0.16s ease, border-color 0.16s ease;
}

.note-meta a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

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

.note-figure img {
  aspect-ratio: 16 / 9;
}

.note-section {
  margin-bottom: 28px;
}

.note-section h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

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

/* --------------------------------------------------------------------------
   pages · 常见问题
   -------------------------------------------------------------------------- */

.faq-group {
  padding: 40px 0 0;
}

.faq-group:first-of-type {
  padding-top: 30px;
}

.faq-group .section-head {
  margin-bottom: 18px;
}

.faq-figure {
  margin: 0 0 24px;
}

.faq-figure img {
  aspect-ratio: 21 / 8;
}

.faq-figure-cap {
  font-size: 13px;
  color: var(--ink-soft);
}

.faq-next {
  padding: 44px 0 0;
}

.entry-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

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

.entry-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 18px 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.16s ease;
}

.entry-link:hover {
  border-color: var(--accent);
}

.entry-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.entry-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.entry-arrow {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   pages · 合作准备
   -------------------------------------------------------------------------- */

.page-hero-text {
  max-width: 720px;
}

.page-hero + .page-note,
.page-hero .page-note {
  margin-top: 16px;
}

.page-note {
  max-width: 720px;
  margin-top: 18px;
}

.note-label {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.prep-section {
  padding: 34px 0 0;
}

.prep-figure {
  margin: 20px 0 26px;
}

.prep-figure img {
  aspect-ratio: 21 / 8;
}

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

.prep-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.prep-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding-top: 5px;
}

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

.prep-body h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.prep-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 66ch;
}

.materials-section {
  padding: 44px 0 0;
}

.materials-section .table-wrap {
  margin-top: 20px;
}

.next-section {
  padding: 44px 0 0;
}

.next-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.next-body {
  max-width: 70ch;
}

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

.next-body .btn {
  margin-top: 12px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  padding-bottom: 64px;
}

.error-hero {
  padding: 64px 0 8px;
}

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

.error-code {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.error-hero h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 14px;
}

.error-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

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

.error-paths {
  padding: 44px 0 0;
}

.error-paths h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.error-path-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  max-width: 760px;
}

.error-path-list li a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--ink);
  transition: border-color 0.16s ease, color 0.16s ease;
}

.error-path-list li a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   responsive · 960px
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .hero-media {
    margin-top: 8px;
  }

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

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

  .process-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 20px;
  }

  .flow-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 20px;
  }

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

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

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

  .cta-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .cta-tips {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 20px;
  }

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

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

  .footer-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px 28px;
  }
}

/* --------------------------------------------------------------------------
   responsive · 720px · 移动端导航与单列
   -------------------------------------------------------------------------- */

@media (max-width: 720px) {
  :root {
    --wrap-pad: 18px;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    min-height: 60px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .brand-name {
    font-size: 18px;
  }

  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    flex: 0 0 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 4px 0 14px;
    border-top: 1px solid var(--line-soft);
  }

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

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

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

  .nav-link {
    display: flex;
    align-items: center;
    min-height: 46px;
    padding: 10px 2px;
    font-size: 16px;
    border-bottom: 0;
  }

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

  .breadcrumb {
    padding-top: 16px;
  }

  .page-header {
    padding: 14px 0 20px;
  }

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

  .page-hero {
    padding: 22px 0 4px;
  }

  .page-lead,
  .page-hero-lead {
    font-size: 16px;
  }

  .section {
    padding: 44px 0;
  }

  .hero {
    padding-top: 28px;
  }

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

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

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

  .hero-media img {
    aspect-ratio: 4 / 3;
  }

  .info-strip {
    margin-top: 36px;
    padding: 24px 0;
  }

  .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 18px;
  }

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

  .process-track {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .process-node {
    padding-right: 0;
  }

  .flow-track {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

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

  .scenario-figure img,
  .service-figure img,
  .process-visual .media-figure img,
  .prep-figure img,
  .faq-figure img,
  .scenario-figure .content-figure img {
    aspect-ratio: 16 / 9;
  }

  .cta-inner {
    padding: 36px var(--wrap-pad);
  }

  .cta-main h2 {
    font-size: 21px;
  }

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

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

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

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

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

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

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

  .step-item .status-tag {
    justify-self: start;
    margin-top: 0;
  }

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

  .note-code {
    padding-top: 0;
  }

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

  .prep-no {
    padding-top: 0;
  }

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

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

  /* 表格转堆叠 */

  .data-table thead,
  .version-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .data-table,
  .version-table {
    border: 0;
    background-color: transparent;
  }

  .data-table tbody,
  .version-table tbody {
    display: block;
  }

  .data-table tbody tr,
  .version-table tbody tr {
    display: block;
    margin-bottom: 12px;
    background-color: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 4px 0;
  }

  .data-table tbody td,
  .version-table tbody td {
    display: block;
    padding: 8px 16px;
    border-bottom: 1px solid var(--line-soft);
  }

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

  .data-table tbody td:first-child,
  .version-table tbody td:first-child {
    padding-top: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--accent);
    font-weight: 400;
  }

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 32px var(--wrap-pad) 26px;
  }

  .footer-action {
    width: 100%;
  }

  .footer-action .btn {
    width: 100%;
  }

  .footer-links {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 26px var(--wrap-pad);
  }

  .footer-col a {
    padding: 8px 0;
  }

  .footer-bottom {
    padding-bottom: 32px;
  }
}

/* --------------------------------------------------------------------------
   responsive · 390px 细节
   -------------------------------------------------------------------------- */

@media (max-width: 400px) {
  .hero-text h1 {
    font-size: 27px;
  }

  .page-title {
    font-size: 24px;
  }

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

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

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

  .related-list,
  .related-bar .related-links {
    flex-direction: column;
    gap: 0;
  }

  .related-link {
    width: 100%;
    justify-content: space-between;
  }
}

/* --------------------------------------------------------------------------
   交互增强 · 尊重降低动效偏好
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}