:root {
  --color-bg: #f6f7f8;
  --color-panel: #ffffff;
  --color-ink: #1f2328;
  --color-ink-soft: #5b6470;
  --color-accent: #2f6f5e;
  --color-accent-soft: #e6efeb;
  --color-line: #c9ced6;
  --color-line-soft: #e4e7eb;
  --color-warn: #8a5a1f;
  --color-warn-soft: #f7efe3;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 2px rgba(31, 35, 40, 0.05);
  --container: 1120px;
  --content-width: 760px;
}

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

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

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

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

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-ink);
}

p {
  margin: 0;
}

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

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

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover,
a:focus-visible {
  color: #245546;
  text-decoration-thickness: 2px;
}

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

button {
  font: inherit;
  color: inherit;
}

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

.term {
  display: inline-block;
  padding: 0 6px;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-sm);
  background-color: #f1f3f5;
  color: #3a424c;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

/* ============================================================
   layout —— 全站骨架：页头 / 主容器 / 页脚
   ============================================================ */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

.fact-bar {
  border-bottom: 1px solid var(--color-line-soft);
  background-color: #eef0f2;
}

.fact-bar p {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px 24px;
  color: var(--color-ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--color-line);
  background-color: var(--color-panel);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ink);
  text-decoration: none;
}

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

.brand-mark {
  font-size: 20px;
  font-weight: 600;
}

.brand-slogan {
  padding-left: 10px;
  border-left: 1px solid var(--color-line);
  color: var(--color-ink-soft);
  font-size: 13px;
  line-height: 1.4;
}

.site-nav {
  display: block;
}

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

.nav-list li {
  display: block;
}

.nav-list a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-size: 15px;
  text-decoration: none;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background-color: #f1f3f5;
  color: var(--color-accent);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background-color: var(--color-ink);
}

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

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--color-ink-soft);
  font-size: 13px;
}

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

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

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

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

.page-header {
  max-width: var(--content-width);
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 34px;
  font-weight: 600;
  color: var(--color-ink);
}

.page-description {
  margin-top: 10px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

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

.sidebar-left .page-layout,
.page-layout.sidebar-left {
  grid-template-columns: 240px minmax(0, 1fr);
}

.site-footer {
  border-top: 1px solid var(--color-line);
  background-color: var(--color-panel);
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

.footer-group-title {
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--color-ink);
}

.footer-brand-note {
  margin-bottom: 12px;
  color: var(--color-ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

.footer-links li + li {
  margin-top: 6px;
}

.footer-links a {
  color: var(--color-ink-soft);
  font-size: 14px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-line-soft);
}

.footer-copy {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px;
  color: var(--color-ink-soft);
  font-size: 13px;
}

/* ============================================================
   components —— 通用区块、卡片、清单、问答、术语
   ============================================================ */

.section,
.content-section {
  margin-bottom: 44px;
}

.content-section:last-child {
  margin-bottom: 0;
}

.section-head {
  max-width: var(--content-width);
  margin-bottom: 20px;
}

.section-title {
  font-size: 24px;
  color: var(--color-ink);
}

.section-lead {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

.subsection-title {
  margin: 22px 0 8px;
  font-size: 19px;
  color: var(--color-ink);
}

.section-note {
  margin-top: 14px;
  padding: 12px 16px;
  border-left: 3px solid var(--color-warn);
  background-color: var(--color-warn-soft);
  color: #6b4718;
  font-size: 14px;
  line-height: 1.7;
}

.section-more {
  margin-top: 18px;
  font-size: 15px;
}

.section-more a {
  font-weight: 600;
}

.section-tail {
  margin-top: 18px;
  font-size: 15px;
}

.section-tail a + a {
  margin-left: 16px;
}

.section-media,
.content-media,
.content-figure,
.section-figure,
.project-media {
  overflow: hidden;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
}

.section-media img,
.content-media img,
.content-figure img,
.section-figure img,
.project-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.section-media figcaption,
.content-media figcaption,
.content-figure figcaption,
.section-figure figcaption,
.project-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--color-line-soft);
  color: var(--color-ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

.check-list,
.material-list,
.note-list,
.boundary-list,
.compare-list,
.content-list {
  display: block;
}

.check-item,
.material-item {
  position: relative;
  padding: 8px 0 8px 20px;
  border-bottom: 1px solid var(--color-line-soft);
  font-size: 15px;
  line-height: 1.7;
}

.check-item:last-child,
.material-item:last-child {
  border-bottom: 0;
}

.check-item::before,
.material-item::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 4px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--color-accent);
}

.material-name {
  font-weight: 600;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.related-item {
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.related-item a,
.related-link {
  font-weight: 600;
}

.related-desc,
.related-item p {
  margin-top: 6px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.related-title {
  margin-bottom: 12px;
  font-size: 19px;
}

.glossary-list {
  display: block;
}

.glossary-term {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.glossary-term:first-child {
  margin-top: 0;
}

.glossary-desc {
  margin-top: 4px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

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

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

.hero-directory {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 32px;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-line);
}

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

.hero-eyebrow {
  margin-bottom: 10px;
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
}

.hero-title {
  font-size: 34px;
  color: var(--color-ink);
}

.hero-summary {
  margin-top: 14px;
  max-width: 560px;
  color: var(--color-ink-soft);
  font-size: 16px;
  line-height: 1.8;
}

.hero-entries {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.hero-entries a {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
  color: var(--color-ink);
  font-size: 15px;
  text-decoration: none;
}

.hero-entries a:hover,
.hero-entries a:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.hero-media {
  margin-top: 26px;
  overflow: hidden;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero-media figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--color-line-soft);
  color: var(--color-ink-soft);
  font-size: 13px;
}

.hero-catalog {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.catalog-title {
  margin-bottom: 14px;
  font-size: 19px;
}

.catalog-cards {
  display: grid;
  gap: 12px;
}

.catalog-card {
  padding: 14px 16px;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-md);
  background-color: #fbfcfc;
}

.catalog-card:hover {
  border-color: var(--color-accent);
}

.catalog-card-name {
  font-size: 16px;
}

.catalog-card-field {
  margin-top: 6px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.catalog-card-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 14px;
  font-weight: 600;
}

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

.service-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.service-item:hover {
  border-color: var(--color-accent);
}

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

.service-audience,
.service-delivery {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.section-process .section-media {
  margin-bottom: 22px;
}

.stage-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.stage-item {
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
}

.stage-no {
  display: inline-block;
  margin-bottom: 8px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

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

.stage-note {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.prepare-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.faq-entry-body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.question-list {
  display: block;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
}

.question-item + .question-item {
  border-top: 1px solid var(--color-line-soft);
}

.question-item a {
  display: block;
  padding: 14px 18px;
  font-size: 15px;
  text-decoration: none;
}

.question-item a:hover,
.question-item a:focus-visible {
  background-color: #f7f9f9;
  color: var(--color-accent);
}

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

.term-panel-title {
  font-size: 17px;
}

.term-panel-lead {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.term-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.term-panel-more {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
}

.index-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
}

.index-column {
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
}

.index-column-title {
  font-size: 16px;
}

.index-column-title a {
  text-decoration: none;
}

.index-column-title a:hover,
.index-column-title a:focus-visible {
  text-decoration: underline;
}

.index-column-note {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

/* ============================================================
   pages —— 内页共用侧栏与栏目模块
   ============================================================ */

.side-catalog,
.side-directory {
  align-self: start;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
}

.catalog-toggle {
  display: none;
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: #fbfcfc;
  font-size: 15px;
  text-align: left;
  cursor: pointer;
}

.catalog-body {
  display: block;
}

.side-catalog .catalog-title,
.side-directory .side-title,
.side-directory .side-directory-title {
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--color-ink);
}

.side-catalog .catalog-title + .catalog-list + .catalog-title,
.side-directory .side-title + .side-nav + .side-title,
.side-directory .side-directory-title + .side-nav + .side-directory-title {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line-soft);
}

.catalog-list,
.side-nav-list {
  display: block;
}

.catalog-list li + li,
.side-nav-list li + li {
  margin-top: 4px;
}

.catalog-list a,
.side-nav-list a {
  display: block;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: 14px;
  text-decoration: none;
}

.catalog-list a:hover,
.catalog-list a:focus-visible,
.side-nav-list a:hover,
.side-nav-list a:focus-visible {
  background-color: #f1f3f5;
  color: var(--color-accent);
}

.catalog-list a.is-current,
.side-nav-list a.is-current {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 600;
}

.catalog-list-sub a {
  color: var(--color-ink-soft);
  font-size: 13px;
}

.side-subtitle {
  margin: 20px 0 10px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line-soft);
  font-size: 15px;
}

.side-anchor-list {
  display: block;
}

.side-anchor-list li + li {
  margin-top: 4px;
}

.side-anchor-list a {
  display: block;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: 14px;
  text-decoration: none;
}

.side-anchor-list a:hover,
.side-anchor-list a:focus-visible {
  background-color: #f1f3f5;
  color: var(--color-accent);
}

.content-column,
.main-column {
  min-width: 0;
  max-width: var(--content-width);
}

.content-column p,
.main-column p {
  font-size: 16px;
  line-height: 1.8;
}

.content-column p + p,
.main-column p + p {
  margin-top: 12px;
}

.content-list {
  margin-top: 12px;
}

.content-list li {
  position: relative;
  padding: 6px 0 6px 18px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.content-list li::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 2px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--color-accent);
}

.content-list a {
  font-weight: 600;
}

/* services 页：服务项目卡片 */

.project-card {
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.project-card:first-of-type {
  margin-top: 0;
}

.project-card .project-media {
  margin-bottom: 16px;
}

.project-name {
  font-size: 19px;
}

.project-def {
  margin-top: 10px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.project-meta {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 8px 16px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-line-soft);
}

.project-meta dt {
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
}

.project-meta dd {
  color: var(--color-ink);
  font-size: 14px;
  line-height: 1.7;
}

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

.compare-column {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
}

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

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

.compare-title {
  margin-bottom: 10px;
  font-size: 16px;
}

.compare-include .compare-title {
  color: var(--color-accent);
}

.compare-exclude .compare-title {
  color: var(--color-warn);
}

.compare-list li {
  position: relative;
  padding: 6px 0 6px 18px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.compare-list li::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 2px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--color-line);
}

/* process 页：阶段总览与阶段块 */

.stage-track {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.stage-track .stage-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
}

.stage-track .stage-index {
  align-self: flex-start;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.stage-track .stage-name {
  font-size: 16px;
  font-weight: 600;
}

.stage-track .stage-note {
  color: var(--color-ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

.stage-block {
  margin-top: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.stage-block:first-of-type {
  margin-top: 0;
}

.stage-block-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-line-soft);
}

.stage-block-head .stage-index {
  padding: 0 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.stage-block-title {
  font-size: 18px;
}

.stage-block-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stage-column {
  min-width: 0;
  padding: 16px 20px;
}

.stage-column + .stage-column {
  border-left: 1px solid var(--color-line-soft);
}

.stage-column-coop::before,
.stage-column-output::before {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
}

.stage-column-coop::before {
  content: "客户配合事项";
  color: var(--color-accent);
}

.stage-column-output::before {
  content: "产出形式";
  color: var(--color-warn);
}

.stage-column p {
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.stage-column p + p {
  margin-top: 8px;
}

.stage-column .output-list {
  display: block;
}

.stage-column .output-list li {
  position: relative;
  padding: 6px 0 6px 18px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.stage-column .output-list li::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 2px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--color-line);
}

.note-list li {
  position: relative;
  padding: 10px 0 10px 18px;
  border-bottom: 1px solid var(--color-line-soft);
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

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

.note-list li::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 2px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background-color: var(--color-warn);
}

.note-list strong {
  color: var(--color-ink);
}

/* faq 页：分组问答 */

.faq-section {
  margin-bottom: 44px;
}

.faq-section:last-child {
  margin-bottom: 0;
}

.faq-list {
  margin-top: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
  overflow: hidden;
}

.faq-item + .faq-item {
  border-top: 1px solid var(--color-line-soft);
}

.faq-question {
  position: relative;
  padding: 16px 44px 16px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
}

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

.faq-question:hover {
  background-color: #f7f9f9;
}

.faq-answer {
  padding: 0 18px 18px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.faq-answer p + p {
  margin-top: 10px;
}

.boundary-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.boundary-item {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-warn);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
}

.boundary-title {
  font-size: 16px;
}

.boundary-item p {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.related-links {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--color-line-soft);
}

.related-note {
  margin-top: 10px;
  color: var(--color-ink-soft);
  font-size: 14px;
}

/* about 页：栏目索引 */

.index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.index-card {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
}

.index-card-title {
  font-size: 16px;
}

.index-card-title a {
  text-decoration: none;
}

.index-card-title a:hover,
.index-card-title a:focus-visible {
  text-decoration: underline;
}

.index-card-desc {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

/* 404 页 */

.error-main {
  display: flex;
  justify-content: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px;
}

.error-panel {
  width: 100%;
  max-width: 560px;
  padding: 32px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-panel);
  text-align: left;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-warn);
}

.error-title {
  margin-top: 10px;
  font-size: 28px;
}

.error-text {
  margin-top: 12px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.error-links {
  margin-top: 20px;
  display: grid;
  gap: 8px;
}

.error-links a {
  display: block;
  padding: 10px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: #fbfcfc;
  font-size: 15px;
  text-decoration: none;
}

.error-links a:hover,
.error-links a:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.error-home {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.error-home:hover,
.error-home:focus-visible {
  background-color: #245546;
  color: #ffffff;
}

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

@media (max-width: 1024px) {
  .hero-directory {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
  }

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

@media (max-width: 768px) {
  .fact-bar p {
    padding: 8px 16px;
    font-size: 12px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding-top: 8px;
    border-top: 1px solid var(--color-line-soft);
  }

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

  .nav-list a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 10px 12px;
    font-size: 15px;
  }

  .inner-main,
  .home-main {
    padding: 18px 16px 40px;
  }

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

  .section-title {
    font-size: 21px;
  }

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

  .page-header {
    margin-bottom: 22px;
    padding-bottom: 16px;
  }

  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .side-catalog,
  .side-directory {
    padding: 14px;
  }

  .catalog-toggle {
    display: block;
  }

  .catalog-body {
    display: none;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--color-line-soft);
  }

  .catalog-body.is-open {
    display: block;
  }

  .prepare-body,
  .faq-entry-body,
  .compare-grid,
  .stage-block-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .stage-column + .stage-column {
    border-left: 0;
    border-top: 1px solid var(--color-line-soft);
  }

  .project-meta {
    grid-template-columns: 84px minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 28px 16px 20px;
  }

  .footer-copy {
    padding: 14px 16px;
  }

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

  .error-panel {
    padding: 24px;
  }
}

@media (max-width: 390px) {
  .hero-entries a {
    width: 100%;
    text-align: center;
  }

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

  .project-meta dd {
    margin-bottom: 8px;
  }
}