:root {
  --bg-page: #F8F7F4;
  --bg-surface: #FFFFFF;
  --text-main: #1D1B19;
  --text-secondary: #6E6A63;
  --accent: #C8452C;
  --accent-soft: #FBEDE8;
  --line: #E4E1DB;
  --radius: 6px;
  --container: 1120px;
  --content-narrow: 860px;
  --content-contact: 800px;
  --sidebar-w: 260px;
  --sidebar-service: 240px;
  --font-stack: "PingFang SC", "HarmonyOS Sans", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", monospace;
}

/* ============================================
   base
   ============================================ */

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

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

body.site-body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

h1, h2, h3, h4 {
  margin: 0 0 0.4em;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
}

h2 { font-size: 22px; }
h3 { font-size: 17px; }
h4 { font-size: 16px; }

p {
  margin: 0 0 1em;
}

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

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

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

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

/* ============================================
   layout — 全站骨架
   ============================================ */

.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--accent);
  text-decoration: none;
}

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

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

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--text-secondary);
  border-radius: var(--radius);
  white-space: nowrap;
  line-height: 1.4;
}

.nav-link:hover {
  color: var(--text-main);
  background-color: var(--bg-page);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--accent);
  background-color: var(--accent-soft);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius);
  flex-shrink: 0;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background-color: var(--text-main);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--line);
}

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

.mobile-nav-list {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px 16px 16px;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 16px;
  color: var(--text-main);
  border-radius: var(--radius);
}

.mobile-nav-link:hover {
  background-color: var(--bg-page);
  text-decoration: none;
}

.mobile-nav-link.is-current {
  color: var(--accent);
  background-color: var(--accent-soft);
  font-weight: 600;
}

.site-main {
  display: block;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

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

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

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

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

.page-header {
  margin-bottom: 8px;
}

.page-title {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0;
  color: var(--text-main);
}

.page-head {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.page-lead,
.page-lede {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 0 8px;
}

.page-note,
.page-hint,
.page-meta {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

.page-note::before,
.page-hint::before,
.page-meta::before {
  content: "·";
  margin-right: 6px;
  color: var(--line);
}

/* 通用两栏布局：默认主内容在前、aside 在后 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-w);
  gap: 48px;
  align-items: start;
}

/* 侧栏在左（首页 / 服务范围 / 推进路径） */
.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.sidebar-left .content-column {
  min-width: 0;
}

.layout-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

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

.page-body {
  max-width: var(--content-narrow);
}

/* ============================================
   components — 通用组件
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn-primary:hover {
  background-color: #AF3A23;
  border-color: #AF3A23;
  color: #FFFFFF;
}

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

.btn-ghost:hover {
  background-color: var(--bg-page);
  border-color: var(--text-secondary);
  color: var(--text-main);
}

.section-intro,
.section-lede {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0 0 24px;
  max-width: 720px;
}

.section-intro a,
.section-lede a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
}

.section-title {
  font-size: 22px;
  margin: 0 0 12px;
}

.subsection-title {
  font-size: 17px;
  margin: 0 0 12px;
}

/* 业务索引 / 服务索引 */
.biz-index,
.service-index {
  position: sticky;
  top: 84px;
  align-self: start;
}

.biz-index-title,
.service-index-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.biz-index-list,
.service-index-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.biz-index-link,
.service-index-link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--text-secondary);
  border-radius: var(--radius);
  line-height: 1.4;
}

.biz-index-link:hover,
.service-index-link:hover {
  color: var(--text-main);
  background-color: var(--bg-surface);
  text-decoration: none;
}

.biz-index-link.is-current,
.service-index-link.is-current {
  color: var(--accent);
  background-color: var(--accent-soft);
  font-weight: 600;
}

/* 通用图容器 */
.hero-figure,
.capability-figure,
.scenario-figure,
.section-figure,
.panel-figure,
.stage-figure,
.method-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
}

.hero-figure img,
.capability-figure img,
.scenario-figure img,
.section-figure img,
.panel-figure img,
.stage-figure img,
.method-figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.hero-figure figcaption,
.capability-figure figcaption,
.scenario-figure figcaption,
.section-figure figcaption,
.panel-figure figcaption,
.stage-figure figcaption,
.method-figure figcaption {
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border-top: 1px solid var(--line);
  line-height: 1.6;
}

/* 相关入口卡片 */
.entry-card-list,
.entry-cards,
.entry-list {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.entry-card,
.entry-item {
  list-style: none;
}

.entry-card-link,
.entry-link {
  display: block;
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text-main);
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.entry-card-link:hover,
.entry-link:hover {
  border-color: var(--accent);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 2px 10px rgba(29, 27, 25, 0.05);
}

.entry-card-title,
.entry-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.5;
}

.entry-card-text,
.entry-card-desc,
.entry-desc,
.entry-link-note {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.entry-link-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
}

/* 折叠说明 */
.fold-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fold-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.fold-summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 18px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  line-height: 1.6;
}

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

.fold-summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-size: 18px;
  color: var(--text-secondary);
  font-weight: 400;
}

.fold-item[open] .fold-summary::after {
  content: "−";
}

.fold-summary:hover {
  background-color: var(--bg-page);
}

.fold-body {
  padding: 0 18px 16px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.fold-body p {
  margin: 0;
}

/* 数据表格 */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.data-table-caption,
.table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  background-color: var(--bg-page);
  border-bottom: 1px solid var(--line);
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.7;
}

.data-table thead th {
  background-color: var(--bg-page);
  font-weight: 600;
  color: var(--text-main);
  font-size: 14px;
}

.data-table tbody th {
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}

.data-table tbody td {
  color: var(--text-secondary);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* 相关链接条 */
.related-links {
  max-width: var(--container);
  margin: 32px auto 0;
  padding: 20px 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.related-links-label {
  font-size: 14px;
  color: var(--text-secondary);
}

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

/* ============================================
   footer
   ============================================ */

.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--line);
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 12px;
  letter-spacing: 0.02em;
}

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

.footer-link {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

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

.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
}

.footer-brand {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0;
}

.footer-slogan {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  flex: 1;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  width: 100%;
}

/* ============================================
   pages — 首页
   ============================================ */

.home-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.hero {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
}

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

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  margin: 0 0 12px;
  font-weight: 600;
}

.hero-lead h1 {
  font-size: 34px;
  line-height: 1.35;
  margin: 0 0 20px;
  font-weight: 600;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0 0 12px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-figure {
  border-radius: 8px;
}

.hero-axis {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background-color: var(--bg-surface);
  overflow: hidden;
}

.hero-axis .axis-step {
  padding: 20px 22px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.hero-axis .axis-step:last-child {
  border-right: none;
}

.hero-axis .axis-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 600;
}

.hero-axis .axis-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.hero-axis .axis-note {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 首页正文区块 */
.home-main section[id] {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.home-main section[id]:last-of-type {
  border-bottom: none;
}

.capabilities h2,
.scenario-groups h2,
.path-summary h2,
.delivery-standards h2,
.before-contact h2,
.contact-entry h2 {
  margin: 0 0 12px;
  font-size: 22px;
}

/* 服务能力条目 */
.capability-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.capability-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num problem"
    "num output";
  gap: 4px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.capability-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 600;
  padding-top: 4px;
}

.capability-name {
  grid-area: name;
  font-size: 17px;
  margin: 0;
  color: var(--text-main);
}

.capability-problem {
  grid-area: problem;
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.75;
}

.capability-output {
  grid-area: output;
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

.capability-output::before {
  content: "产出：";
  color: var(--accent);
  font-weight: 600;
}

.capability-figure {
  margin-top: 28px;
  border-radius: 8px;
}

/* 适用场景分组 */
.scenario-group {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.scenario-group-name {
  font-size: 17px;
  margin: 0 0 12px;
  color: var(--text-main);
}

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

.scenario-item {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  padding-left: 18px;
  position: relative;
}

.scenario-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
}

.scenario-figure {
  margin-top: 28px;
  border-radius: 8px;
}

/* 推进路径摘要 */
.path-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.path-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.path-stage {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.path-owner {
  font-size: 14px;
  color: var(--accent);
}

.path-output {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 交付标准与配合事项 */
.standards-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.standards-column {
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  min-width: 0;
}

.standards-heading {
  font-size: 17px;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: var(--text-main);
}

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

.standards-item {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  padding-left: 20px;
  position: relative;
}

.standards-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background-color: var(--accent);
}

/* 接洽前确认事项 */
.before-contact .fold-list {
  margin-top: 8px;
}

/* 合作接洽入口 */
.contact-entry .entry-tips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 0 0 24px;
}

.entry-tip {
  padding: 14px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.contact-entry .entry-link {
  display: block;
  padding: 20px 24px;
  background-color: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--text-main);
}

.contact-entry .entry-link:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 2px 10px rgba(200, 69, 44, 0.12);
}

.contact-entry .entry-link-title {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
}

.contact-entry .entry-link-note {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   pages — 服务范围
   ============================================ */

.service-items {
  margin-bottom: 48px;
}

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

.service-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.service-item-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 6px;
}

.service-item-name {
  font-size: 18px;
  margin: 0 0 14px;
  color: var(--text-main);
}

.service-item-detail {
  margin: 0;
  display: grid;
  gap: 8px;
}

.service-item-detail dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.service-item-detail dd {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.service-item-detail dd:last-child {
  margin-bottom: 0;
}

.delivery-package {
  margin-bottom: 48px;
}

.delivery-package .section-figure {
  margin: 0 0 28px;
  border-radius: 8px;
}

.package-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.package-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}

.package-name {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--text-main);
}

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

.coop-notes {
  padding: 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

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

.coop-item {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  padding-left: 20px;
  position: relative;
}

.coop-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid var(--accent);
}

.service-boundary {
  margin-bottom: 48px;
}

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

.boundary-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  min-width: 0;
}

.boundary-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-main);
  margin: 0 0 6px;
  line-height: 1.7;
}

.boundary-reason {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

/* ============================================
   pages — 适用场景
   ============================================ */

.scenario-tabs {
  max-width: var(--content-narrow);
  margin: 0 auto 48px;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.tab-button {
  min-height: 44px;
  padding: 8px 18px;
  font-size: 15px;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.tab-button:hover {
  color: var(--text-main);
  border-color: var(--text-secondary);
}

.tab-button.is-active {
  color: var(--accent);
  background-color: var(--accent-soft);
  border-color: var(--accent);
  font-weight: 600;
}

.tab-panel {
  min-width: 0;
}

.tab-panel[hidden] {
  display: none;
}

.panel-title {
  font-size: 20px;
  margin: 0 0 12px;
  color: var(--text-main);
}

.panel-text {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0 0 20px;
}

.panel-subtitle {
  font-size: 16px;
  margin: 0 0 12px;
  color: var(--text-main);
}

.panel-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.panel-points li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  padding-left: 20px;
  position: relative;
}

.panel-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
}

.panel-figure {
  border-radius: 8px;
}

.input-matrix {
  max-width: var(--content-narrow);
  margin: 0 auto 48px;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.matrix-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  background-color: var(--bg-page);
  border-bottom: 1px solid var(--line);
}

.matrix-table th,
.matrix-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.7;
}

.matrix-table thead th {
  background-color: var(--bg-page);
  font-weight: 600;
  color: var(--text-main);
  font-size: 14px;
}

.matrix-table tbody th {
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}

.matrix-table tbody td {
  color: var(--text-secondary);
}

.matrix-table tbody tr:last-child th,
.matrix-table tbody tr:last-child td {
  border-bottom: none;
}

.not-applicable {
  max-width: var(--content-narrow);
  margin: 0 auto 48px;
}

.na-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.na-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}

.na-title {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--text-main);
}

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

.scenarios .related-entry {
  max-width: var(--content-narrow);
  margin: 0 auto;
}

/* ============================================
   pages — 推进路径
   ============================================ */

.stage-axis {
  margin-bottom: 48px;
}

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

.stage-item {
  padding: 24px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}

.stage-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 6px;
}

.stage-name {
  font-size: 18px;
  margin: 0 0 14px;
  color: var(--text-main);
}

.stage-detail {
  margin: 0;
  display: grid;
  gap: 8px;
}

.stage-detail dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.stage-detail dd {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.stage-detail dd:last-child {
  margin-bottom: 0;
}

.stage-figure {
  margin-top: 28px;
  border-radius: 8px;
}

.role-split {
  margin-bottom: 48px;
}

.blockers {
  margin-bottom: 48px;
}

.blocker-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.blocker-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}

.blocker-name {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--text-main);
}

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

/* ============================================
   pages — 方法观察
   ============================================ */

.method-points,
.term-table,
.misuse-notes {
  max-width: var(--content-narrow);
  margin: 0 auto 48px;
}

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

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

.method-name {
  font-size: 17px;
  margin: 0 0 10px;
  color: var(--text-main);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.method-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

.method-step {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0 0 8px;
  line-height: 1.75;
}

.method-fit {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

.method-fit::before {
  content: "适用：";
  color: var(--accent);
  font-weight: 600;
}

.method-figure {
  margin-top: 28px;
  border-radius: 8px;
}

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

.misuse-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}

.misuse-name {
  font-size: 16px;
  margin: 0 0 10px;
  color: var(--text-main);
}

.misuse-wrong {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0 0 8px;
  line-height: 1.75;
  padding-left: 20px;
  position: relative;
}

.misuse-wrong::before {
  content: "×";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--text-secondary);
  font-weight: 600;
}

.misuse-right {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.75;
  padding-left: 20px;
  position: relative;
}

.misuse-right::before {
  content: "√";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 600;
}

.observations .related-entry {
  max-width: var(--content-narrow);
  margin: 0 auto;
}

/* ============================================
   pages — 合作接洽
   ============================================ */

.prepare-checklist,
.request-points,
.review-focus,
.qa-list,
.site-entry {
  max-width: var(--content-contact);
  margin: 0 auto 48px;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.checklist-item {
  display: grid;
  grid-template-columns: minmax(120px, 200px) minmax(0, 1fr);
  gap: 16px;
  padding: 16px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  align-items: baseline;
  min-width: 0;
}

.checklist-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.6;
}

.checklist-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.75;
}

.prepare-checklist .section-figure {
  margin: 0;
  border-radius: 8px;
}

.points-list,
.focus-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.points-item,
.focus-item {
  padding: 18px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
}

.points-name,
.focus-name {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--text-main);
}

.points-desc,
.focus-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.75;
}

.qa-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.qa-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.qa-question {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 18px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  line-height: 1.6;
}

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

.qa-question::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-size: 18px;
  color: var(--text-secondary);
  font-weight: 400;
}

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

.qa-question:hover {
  background-color: var(--bg-page);
}

.qa-answer {
  padding: 0 18px 16px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.qa-answer p {
  margin: 0;
}

/* ============================================
   pages — 404
   ============================================ */

.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 80px 24px 64px;
}

.error-panel {
  max-width: 640px;
  margin-bottom: 48px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 12px;
}

.error-panel h1 {
  font-size: 30px;
  margin: 0 0 16px;
  color: var(--text-main);
}

.error-text {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0 0 28px;
}

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

.error-links {
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.error-links h2 {
  font-size: 20px;
  margin: 0 0 20px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.error-link {
  display: block;
  padding: 14px 18px;
  background-color: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  color: var(--text-main);
}

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

/* ============================================
   responsive
   ============================================ */

@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .nav-link {
    padding: 8px 10px;
    font-size: 14px;
  }

  .page-layout,
  .sidebar-left,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .biz-index,
  .service-index {
    position: static;
    top: auto;
  }

  .biz-index-list,
  .service-index-list {
    flex-direction: row;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .biz-index-link,
  .service-index-link {
    flex-shrink: 0;
    white-space: nowrap;
    border: 1px solid var(--line);
    background-color: var(--bg-surface);
  }

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

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

  .standards-grid {
    gap: 24px;
  }

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    height: 56px;
  }

  .primary-nav.site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-nav:not([hidden]) {
    display: block;
  }

  .inner-main {
    padding: 20px 16px 48px;
  }

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

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

  .breadcrumb {
    margin-bottom: 16px;
  }

  .page-head {
    margin-bottom: 28px;
    padding-bottom: 20px;
  }

  .hero {
    padding: 32px 0 28px;
    margin-bottom: 32px;
  }

  .hero-lead h1 {
    font-size: 26px;
  }

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

  .hero-axis .axis-step {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 16px 18px;
  }

  .hero-axis .axis-step:last-child {
    border-bottom: none;
  }

  .home-main section[id] {
    padding: 32px 0;
  }

  .capability-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 4px 12px;
    padding: 16px 0;
  }

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

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

  .standards-column {
    padding: 20px;
  }

  .entry-card-list,
  .entry-cards,
  .entry-list,
  .package-list,
  .na-list,
  .blocker-list,
  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .related-links {
    margin: 24px 16px 0;
    padding: 16px;
  }

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

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

  .data-table tbody th,
  .matrix-table tbody th {
    white-space: normal;
  }

  .checklist-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 14px 16px;
  }

  .footer-inner {
    padding: 36px 16px 24px;
  }

  .footer-groups {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .footer-slogan {
    flex: none;
  }

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

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

  .tab-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 12px;
  }

  .tab-button {
    flex-shrink: 0;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .hero-lead h1 {
    font-size: 24px;
  }

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

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

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

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

/* ============================================
   motion — 视口淡入（增强，不影响初始可见）
   ============================================ */

@media (prefers-reduced-motion: no-preference) {
  .home-main section[id],
  .inner-main section[id] {
    animation: section-fade-in 0.5s ease both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }
}

@keyframes section-fade-in {
  from {
    opacity: 0.001;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ============================================
   print
   ============================================ */

@media print {
  .site-header,
  .primary-nav,
  .nav-toggle,
  .mobile-nav,
  .biz-index,
  .service-index,
  .related-links,
  .footer-groups {
    display: none !important;
  }

  .site-footer {
    border-top: 1px solid #000;
  }

  .footer-bottom {
    display: block;
  }

  body.site-body {
    background: #FFFFFF;
    color: #000000;
  }
}