/* ==========================================================================
   麻花星空无限 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --ink: #14213D;
  --ink-soft: #2A3550;
  --paper: #F6F4EF;
  --surface: #FFFFFF;
  --amber: #C9782A;
  --amber-soft: #F3E6D6;
  --teal: #2F6F6B;
  --teal-soft: #E2EDEC;
  --muted: #5B6472;
  --line: #DAD6CC;
  --line-strong: #C3BEB2;
  --radius: 6px;
  --radius-sm: 4px;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;
  --content-max: 880px;
  --rail-width: 260px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: normal;
}

p {
  margin: 0 0 1em;
}

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

ul,
ol {
  margin: 0 0 1em;
  padding: 0;
  list-style: none;
}

ul:last-child,
ol:last-child {
  margin-bottom: 0;
}

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

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

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

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

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

button {
  font: inherit;
  color: inherit;
}

dl,
dd,
dt,
figure,
figcaption {
  margin: 0;
}

strong {
  color: var(--ink);
  font-weight: 700;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: top 0.18s ease;
}

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

/* --------------------------------------------------------------------------
   layout · 全站外壳
   -------------------------------------------------------------------------- */

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 32px;
}

.header-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.header-brand::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  background: var(--amber);
  vertical-align: 2px;
}

.directory-toggle {
  display: none;
  min-height: 44px;
  min-width: 44px;
  padding: 0 14px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink);
  cursor: pointer;
}

.directory-toggle:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.mobile-directory {
  display: none;
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 28px 0 72px;
}

/* 桌面端两栏：侧栏在前 */
.layout-shell.sidebar-left,
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}

.layout-shell.sidebar-left > .content-column,
.page-layout.sidebar-left > .site-main {
  min-width: 0;
}

.content-column {
  min-width: 0;
  padding-bottom: 64px;
}

.home-main {
  padding-top: 40px;
}

/* --------------------------------------------------------------------------
   components · 目录侧栏（四种类名同构）
   -------------------------------------------------------------------------- */

.site-directory,
.directory,
.directory-rail,
.directory-sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
  max-height: 100vh;
  padding: 32px 24px 28px 0;
  border-right: 1px solid var(--line);
  overflow-y: auto;
}

.directory-brand,
.directory-slogan,
.rail-slogan,
.sidebar-note,
.directory-note,
.rail-note {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.directory-brand,
.rail-brand,
.sidebar-brand {
  display: block;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.brand-slogan {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.directory-nav,
.rail-nav,
.sidebar-nav {
  min-width: 0;
}

.directory-list,
.rail-list,
.sidebar-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.directory-list li,
.rail-list li,
.sidebar-list li {
  border-bottom: 1px solid var(--line);
}

.directory-item,
.rail-item,
.sidebar-item,
.mobile-directory-item {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 10px 8px 14px;
  font-size: 14px;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.directory-item:hover,
.rail-item:hover,
.sidebar-item:hover {
  background: var(--surface);
  border-left-color: var(--amber);
  color: var(--ink);
}

.directory-item.is-current,
.rail-item.is-current,
.sidebar-item.is-current,
.mobile-directory-item.is-current {
  border-left-color: var(--amber);
  background: var(--amber-soft);
  color: var(--ink);
  font-weight: 700;
}

.directory-note,
.rail-note,
.sidebar-note {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

/* --------------------------------------------------------------------------
   components · 内页面包屑与标题区
   -------------------------------------------------------------------------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
}

.breadcrumb a:hover {
  color: var(--amber);
  text-decoration-color: var(--amber);
}

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

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

.page-header {
  margin-bottom: 22px;
}

.page-title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  background: var(--amber);
}

.page-head,
.page-title-block {
  margin-bottom: 30px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.page-summary,
.page-lead {
  margin: 0 0 14px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 34em;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.meta-item,
.meta-field,
.meta-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 0;
}

.meta-pair {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

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

.meta-pair dd {
  margin: 0;
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   components · 章节通用
   -------------------------------------------------------------------------- */

.section,
.content-block,
.content-section,
.qa-group,
.audience-band,
.direction-preview,
.schedule-preview,
.catalog-preview,
.scope-compare,
.reference-points,
.qa-preview,
.collab-band,
.direction-index,
.direction-list-section,
.direction-hints,
.node-summary,
.node-grid-section,
.client-checklist,
.node-deliverable,
.qa-guide {
  margin-bottom: 44px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.section:last-of-type,
.content-block:last-of-type,
.content-section:last-of-type,
.qa-group:last-of-type {
  border-bottom: 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 20px;
  margin-bottom: 14px;
}

.section-title,
.content-block > h2,
.content-section > h2,
.qa-group > h2,
.qa-guide > h2,
.node-summary > h2,
.node-grid-section > h2,
.client-checklist > h2,
.node-deliverable > h2,
.direction-index > h2,
.direction-list-section > h2,
.direction-hints > h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.section-head .section-title {
  margin: 0;
}

.section-note,
.section-intro,
.section-lead,
.block-intro {
  margin: 0 0 18px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.section-more {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: 4px;
}

.section-more::after {
  content: " →";
}

.section-more:hover {
  color: var(--ink);
  text-decoration-color: var(--ink);
}

/* --------------------------------------------------------------------------
   components · 按钮与通用链接组
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn-primary {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.btn-primary:hover {
  background: var(--amber);
  border-color: var(--amber);
  color: #fff;
}

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

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

.tail-links {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.tail-title,
.tail-links-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.tail-list,
.tail-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tail-item,
.tail-links-list li {
  min-width: 0;
}

.tail-link,
.tail-list a,
.tail-links-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--ink);
  transition: border-color 0.16s ease, color 0.16s ease;
}

.tail-link:hover,
.tail-list a:hover,
.tail-links-list a:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* --------------------------------------------------------------------------
   components · 图片容器
   -------------------------------------------------------------------------- */

.hero-figure,
.catalog-figure,
.collab-figure,
.media-figure,
.media-block,
.content-figure {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-figure img,
.catalog-figure img,
.collab-figure img,
.media-figure img,
.media-block img,
.content-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--paper);
}

figcaption,
.media-caption,
.figure-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.media-figure,
.media-block,
.content-figure {
  margin-bottom: 26px;
}

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

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

.qa-item:first-of-type {
  border-top: 1px solid var(--line);
}

.qa-summary,
.qa-question {
  position: relative;
  display: block;
  min-height: 44px;
  padding: 14px 44px 14px 16px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: background 0.16s ease;
}

.qa-summary::-webkit-details-marker,
.qa-question::-webkit-details-marker {
  display: none;
}

.qa-summary::after,
.qa-question::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--amber);
}

.qa-item[open] .qa-summary::after,
.qa-item[open] .qa-question::after {
  content: "−";
}

.qa-summary:hover,
.qa-question:hover {
  background: var(--surface);
}

.qa-body,
.qa-answer {
  padding: 4px 44px 18px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.qa-body p,
.qa-answer p {
  margin-bottom: 0.7em;
}

.qa-body a,
.qa-answer a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   components · 表格
   -------------------------------------------------------------------------- */

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.data-table,
.catalog-table {
  width: 100%;
  font-size: 14px;
  line-height: 1.65;
}

.table-caption {
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.data-table th,
.catalog-table th {
  padding: 11px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: var(--paper);
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}

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

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

.data-table tbody tr:hover,
.catalog-table tbody tr:hover {
  background: var(--paper);
}

.data-table td:first-child,
.catalog-table td:first-child {
  color: var(--ink);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   components · 页脚
   -------------------------------------------------------------------------- */

.site-footer {
  margin-top: 0;
  background: var(--ink);
  color: #C9CEDB;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px 32px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 44px 32px 32px;
}

.footer-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: #8E97AB;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: #DDE1EA;
}

.footer-list a:hover {
  color: #F0B26E;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 32px 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
}

.footer-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #8E97AB;
}

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

/* 首屏 */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: 36px;
  align-items: start;
  margin-bottom: 44px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line-strong);
}

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

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.22;
  color: var(--ink);
}

.hero-lead {
  max-width: 34em;
  margin: 0 0 22px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.fact-fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.fact-item {
  min-width: 0;
  padding: 12px 12px 12px 0;
  border-bottom: 1px solid var(--line);
}

.fact-item dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.fact-item dd {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

/* 服务对象索引带 */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.audience-cell {
  min-width: 0;
  padding: 18px 20px 18px 0;
  border-bottom: 1px solid var(--line);
}

.audience-cell + .audience-cell {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.cell-index {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.audience-cell h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--ink);
}

.audience-cell p:last-child {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* 服务方向索引预览 */
.direction-rows {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.direction-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-width: 0;
  padding: 16px 0 16px 14px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 0.16s ease, background 0.16s ease;
}

.direction-row:hover {
  border-left-color: var(--amber);
  background: var(--surface);
}

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

.row-name {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.row-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 3px;
  background: var(--teal-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--teal);
  vertical-align: 1px;
}

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

.row-link {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--amber);
  white-space: nowrap;
}

.row-link::after {
  content: " →";
}

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

/* 节点节奏网格预览 */
.schedule-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}

.schedule-cell {
  min-width: 0;
  padding: 16px 16px 18px;
  background: var(--surface);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 0.16s ease;
}

.schedule-cell:hover {
  border-left-color: var(--amber);
}

.cell-stage {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.schedule-cell h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--ink);
}

.cell-meta {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.cell-output {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* 交付物目录预览 */
.catalog-body {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.catalog-body .catalog-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

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

/* 适用与不承接情形 */
.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.scope-col {
  min-width: 0;
  padding: 18px 22px 18px 0;
  border-bottom: 1px solid var(--line);
}

.scope-col + .scope-col {
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.scope-col h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--ink);
}

.scope-yes h3::before,
.scope-no h3::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.scope-yes h3::before {
  background: var(--teal);
}

.scope-no h3::before {
  background: var(--muted);
}

.scope-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.scope-list li {
  position: relative;
  padding: 7px 0 7px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--line);
}

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

.scope-list li::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 2px;
  width: 6px;
  height: 6px;
  background: var(--line-strong);
}

.scope-yes .scope-list li::before {
  background: var(--teal);
}

.scope-more {
  margin: 14px 0 0;
  font-size: 14px;
}

.scope-more a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: 3px;
}

/* 资料与规范要点 */
.reference-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: ref;
  border-top: 1px solid var(--line-strong);
}

.reference-item {
  display: grid;
  grid-template-columns: minmax(0, 0.5fr) minmax(0, 1.5fr);
  gap: 6px 24px;
  padding: 14px 0 14px 42px;
  position: relative;
  border-bottom: 1px solid var(--line);
  counter-increment: ref;
}

.reference-item::before {
  content: counter(ref, decimal-leading-zero);
  position: absolute;
  top: 15px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.reference-name {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.reference-item > p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 答疑预览 */
.qa-list {
  border-top: 1px solid var(--line-strong);
}

/* 合作说明通栏 */
.collab-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: 32px;
  align-items: start;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
}

.collab-copy {
  min-width: 0;
}

.collab-copy h2 {
  margin: 0 0 12px;
  font-size: 22px;
  color: var(--ink);
}

.collab-copy > p {
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.collab-steps {
  margin: 18px 0 22px;
  padding: 0;
  list-style: none;
  counter-reset: collab;
  border-top: 1px solid var(--line);
}

.collab-step {
  position: relative;
  padding: 10px 0 10px 34px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  counter-increment: collab;
}

.collab-step::before {
  content: counter(collab, decimal-leading-zero);
  position: absolute;
  top: 10px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

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

/* --------------------------------------------------------------------------
   pages · 服务方向
   -------------------------------------------------------------------------- */

.index-bar {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.index-chip {
  flex: none;
}

.index-chip a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 14px;
  color: var(--ink-soft);
  transition: border-color 0.16s ease, color 0.16s ease, background 0.16s ease;
}

.index-chip a:hover {
  border-color: var(--teal);
  background: var(--teal-soft);
  color: var(--teal);
}

.direction-group {
  margin-bottom: 26px;
}

.group-title {
  margin: 0 0 10px;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--teal);
  border-bottom: 1px solid var(--line-strong);
}

.direction-group .direction-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, 1.35fr) minmax(0, 1.1fr);
  gap: 0;
  align-items: stretch;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  transition: border-color 0.16s ease;
}

.direction-group .direction-row:hover {
  border-left-color: var(--amber);
}

.direction-cell {
  min-width: 0;
  padding: 14px 16px;
}

.direction-cell + .direction-cell {
  border-left: 1px solid var(--line);
}

.field-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.direction-title {
  margin: 0;
  font-size: 16px;
  line-height: 1.45;
  color: var(--ink);
}

.direction-cell > p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.direction-name {
  background: var(--paper);
}

.direction-name .field-label {
  color: var(--teal);
}

.direction-output .field-label {
  color: var(--amber);
}

.hint-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.hint-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 6px 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.hint-question {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

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

/* --------------------------------------------------------------------------
   pages · 节点与排期
   -------------------------------------------------------------------------- */

.summary-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.summary-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.summary-label {
  flex: none;
  min-width: 96px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}

.node-cell {
  min-width: 0;
  padding: 16px 14px 18px;
  background: var(--surface);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 0.16s ease;
}

.node-cell:hover {
  border-left-color: var(--amber);
}

.node-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.node-name {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.45;
  color: var(--ink);
}

.node-fields {
  margin: 0;
}

.node-field {
  padding: 6px 0;
  border-top: 1px dashed var(--line);
}

.node-field dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.node-field dd {
  margin: 2px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.checklist-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.client-checklist .checklist-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.checklist-node {
  flex: none;
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 1px 10px;
  background: var(--teal-soft);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--teal);
}

.mapping-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.mapping-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
}

.mapping-node {
  font-weight: 700;
  color: var(--ink);
}

.mapping-arrow {
  font-family: var(--font-mono);
  color: var(--amber);
}

.mapping-target {
  color: var(--ink-soft);
}

.mapping-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.mapping-note a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   pages · 交付物目录
   -------------------------------------------------------------------------- */

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

.rule-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.rule-item {
  display: grid;
  grid-template-columns: minmax(0, 0.6fr) minmax(0, 1.6fr);
  gap: 4px 22px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.rule-title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

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

.field-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.field-note {
  min-width: 0;
  padding: 14px 20px 16px 0;
  border-bottom: 1px solid var(--line);
}

.field-note:nth-child(even) {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.field-note .field-name {
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--amber);
}

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

.version-rules {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* --------------------------------------------------------------------------
   pages · 资料与规范
   -------------------------------------------------------------------------- */

.material-block {
  margin-bottom: 22px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 2px solid var(--teal);
  border-radius: var(--radius-sm);
}

.material-block:last-child {
  margin-bottom: 0;
}

.material-block h3 {
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--ink);
}

.field-list {
  margin: 0;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(96px, 0.32fr) minmax(0, 1fr);
  gap: 4px 18px;
  padding: 9px 0;
  border-top: 1px dashed var(--line);
}

.field-name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

.example-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.example-item {
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.example-code {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--ink);
  overflow-x: auto;
  white-space: nowrap;
}

.example-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.version-note {
  padding: 16px 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.version-note h3 {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.plain-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  position: relative;
  padding: 6px 0 6px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.plain-list li::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 2px;
  width: 6px;
  height: 1px;
  background: var(--amber);
}

.reference .checklist,
#self-check .checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

#self-check .checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.check-number {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-top: 1px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

/* --------------------------------------------------------------------------
   pages · 合作说明
   -------------------------------------------------------------------------- */

.numbered-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: prereq;
  border-top: 1px solid var(--line-strong);
}

.numbered-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 0 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  counter-increment: prereq;
}

.item-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.item-index::before {
  content: counter(prereq, decimal-leading-zero);
}

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

.item-title {
  margin: 0 0 5px;
  font-size: 15px;
  color: var(--ink);
}

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

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

.duty-panel {
  min-width: 0;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 2px solid var(--teal);
  border-radius: var(--radius-sm);
}

.duty-panel + .duty-panel {
  border-top-color: var(--amber);
}

.panel-title {
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--ink);
}

.duty-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.duty-item {
  position: relative;
  padding: 8px 0 8px 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  border-top: 1px dashed var(--line);
}

.duty-item:first-child {
  border-top: 0;
}

.duty-item::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 2px;
  width: 6px;
  height: 6px;
  background: var(--teal);
}

.duty-panel + .duty-panel .duty-item::before {
  background: var(--amber);
}

.step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.step-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 0 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.step-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.step-title {
  margin: 0 0 5px;
  font-size: 15px;
  color: var(--ink);
}

.step-item p {
  grid-column: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.note-block {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius-sm);
}

.note-block p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.note-block a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: 3px;
}

.block-intro a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   pages · 答疑摘编
   -------------------------------------------------------------------------- */

.qa-guide p {
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.qa-guide a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--amber);
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   pages · 机构与边界
   -------------------------------------------------------------------------- */

.scope-list .scope-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.scope-list .scope-item .field-name {
  flex: none;
  min-width: 108px;
  color: var(--teal);
}

.principle-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: principle;
  border-top: 1px solid var(--line-strong);
}

.principle-item {
  position: relative;
  padding: 14px 0 14px 44px;
  border-bottom: 1px solid var(--line);
  counter-increment: principle;
}

.principle-item::before {
  content: counter(principle, decimal-leading-zero);
  position: absolute;
  top: 15px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.principle-name {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.principle-item p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.exclude-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: exclude;
  border-top: 1px solid var(--line-strong);
}

.exclude-item {
  position: relative;
  padding: 13px 0 13px 44px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  counter-increment: exclude;
}

.exclude-item::before {
  content: counter(exclude, decimal-leading-zero);
  position: absolute;
  top: 14px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.exclude-no {
  background: var(--paper);
}

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

.error-main {
  display: flex;
  justify-content: center;
  padding: 64px 32px 80px;
}

.error-inner {
  width: 100%;
  max-width: var(--content-max);
}

.error-lead {
  max-width: 34em;
  margin: 0 0 24px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 40px;
  padding: 0;
  list-style: none;
}

.link-forward {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 9px 18px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--ink);
  transition: border-color 0.16s ease, color 0.16s ease;
}

.link-forward:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.error-guide {
  padding-top: 26px;
  border-top: 1px solid var(--line-strong);
}

.error-guide-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.error-guide-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--ink);
}

.error-guide-list a:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .node-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .node-cell:nth-child(3) {
    border-right: 1px solid var(--line);
  }

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

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

  .direction-group .direction-row .direction-cell:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .direction-group .direction-row .direction-cell:nth-child(4) {
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 900px) {
  .header-inner {
    padding: 12px 20px;
  }

  .directory-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .mobile-directory {
    display: none;
    border-top: 1px solid var(--line);
    background: var(--surface);
  }

  .mobile-directory.is-open {
    display: block;
  }

  .mobile-directory-list {
    margin: 0;
    padding: 6px 12px 12px;
    list-style: none;
  }

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

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

  .mobile-directory-item {
    padding: 10px 12px;
    font-size: 15px;
    border-left-width: 3px;
  }

  /* 侧栏收进顶部条，主内容独占一行 */
  .layout-shell.sidebar-left,
  .page-layout.sidebar-left {
    display: block;
    padding: 0 20px;
  }

  .site-directory,
  .directory,
  .directory-rail,
  .directory-sidebar {
    display: none;
  }

  .home-main {
    padding-top: 28px;
  }

  .inner-main {
    padding: 22px 0 56px;
  }

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

  .hero-visual {
    order: 1;
  }

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

  .catalog-figure {
    order: 2;
  }

  .collab-band {
    grid-template-columns: minmax(0, 1fr);
    padding: 22px;
  }

  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 32px 20px 24px;
  }

  .footer-bottom {
    padding: 16px 20px 22px;
  }

  .error-main {
    padding: 44px 20px 64px;
  }
}

@media (max-width: 720px) {
  .audience-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .audience-cell,
  .audience-cell + .audience-cell {
    padding: 14px 0;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .schedule-cell {
    border-left: 0;
    padding: 14px 14px 16px 18px;
    border-left: 2px solid transparent;
  }

  .catalog-body .catalog-table {
    display: block;
    border: 0;
    background: transparent;
    overflow: visible;
  }

  .catalog-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .catalog-table tbody,
  .catalog-table tr,
  .catalog-table td {
    display: block;
    width: 100%;
  }

  .catalog-table tr {
    margin-bottom: 12px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    overflow: hidden;
  }

  .catalog-table td {
    border-bottom: 1px dashed var(--line);
  }

  .catalog-table td:last-child {
    border-bottom: 0;
  }

  .catalog-table td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 3px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--muted);
  }

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

  .scope-col,
  .scope-col + .scope-col {
    padding: 16px 0;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
  }

  .reference-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding-left: 38px;
  }

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

  .fact-item {
    padding: 10px 0;
  }

  .direction-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 14px 0 14px 12px;
  }

  .row-link {
    justify-self: start;
  }

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

  .direction-cell {
    padding: 12px 14px;
  }

  .direction-cell + .direction-cell {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .direction-group .direction-row .direction-cell:nth-child(3),
  .direction-group .direction-row .direction-cell:nth-child(4) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

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

  .node-cell {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 0 12px;
    padding: 14px 14px 16px;
    border-left: 0;
    border-right: 0;
  }

  .node-cell:hover {
    border-left: 0;
  }

  .node-index {
    grid-column: 1;
    margin: 0;
    padding-top: 3px;
  }

  .node-name {
    grid-column: 2;
    margin: 0 0 8px;
  }

  .node-fields {
    grid-column: 2;
  }

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

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

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

  .field-note,
  .field-note:nth-child(even) {
    padding: 12px 0;
    border-left: 0;
  }

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

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

  .step-item {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 0 12px;
  }

  .section,
  .content-block,
  .content-section,
  .qa-group,
  .audience-band,
  .direction-preview,
  .schedule-preview,
  .catalog-preview,
  .scope-compare,
  .reference-points,
  .qa-preview,
  .collab-band,
  .direction-index,
  .direction-list-section,
  .direction-hints,
  .node-summary,
  .node-grid-section,
  .client-checklist,
  .node-deliverable,
  .qa-guide {
    margin-bottom: 34px;
    padding-bottom: 26px;
  }

  .section-title,
  .content-block > h2,
  .content-section > h2,
  .qa-group > h2,
  .qa-guide > h2,
  .node-summary > h2,
  .node-grid-section > h2,
  .client-checklist > h2,
  .node-deliverable > h2,
  .direction-index > h2,
  .direction-list-section > h2,
  .direction-hints > h2 {
    font-size: 20px;
  }

  .qa-summary,
  .qa-question {
    padding: 13px 40px 13px 12px;
    font-size: 15px;
  }

  .qa-body,
  .qa-answer {
    padding: 2px 16px 16px 12px;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

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

  .layout-shell.sidebar-left,
  .page-layout.sidebar-left {
    padding: 0 16px;
  }

  .hero h1,
  .page-title {
    font-size: clamp(24px, 7vw, 30px);
  }

  .hero-actions .btn {
    flex: 1 1 100%;
  }

  .footer-groups {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding: 28px 16px 20px;
  }

  .footer-bottom {
    padding: 14px 16px 20px;
  }

  .collab-band {
    padding: 18px;
  }

  .error-main {
    padding: 36px 16px 56px;
  }

  .error-actions .link-forward {
    flex: 1 1 100%;
    justify-content: center;
  }

  .summary-label {
    min-width: 100%;
  }

  .scope-list .scope-item .field-name {
    min-width: 100%;
  }
}

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