:root {
  --color-bg: #ffffff;
  --color-ink: #1f2a24;
  --color-ink-soft: #4a5a51;
  --color-muted: #6d7a72;
  --color-green: #3f7d5a;
  --color-earth: #c98a3a;
  --color-blue: #5a7fa8;
  --color-surface: #f3f5f2;
  --color-line: #dde3dd;
  --color-line-strong: #c3cdc5;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 2px rgba(31, 42, 36, 0.06), 0 6px 18px rgba(31, 42, 36, 0.05);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container: 1120px;
  --header-height: 64px;
}

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

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

body.site-body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: normal;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
figure,
figcaption,
blockquote {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 0;
}

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

a:hover {
  color: #2f6347;
}

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

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

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

/* ============ layout ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: saturate(160%) blur(6px);
}

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

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

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-line);
  margin-top: 24px;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px 28px;
}

.footer-copy {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 32px;
  color: var(--color-muted);
  font-size: 13px;
  border-top: 1px solid var(--color-line);
  padding-top: 20px;
}

/* ============ components ============ */
/* 顶部信息条 */
.top-notice,
.topbar,
.top-bar {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

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

/* 品牌标识 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ink);
  font-weight: 600;
  font-size: 17px;
  flex: 0 0 auto;
}

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

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background-color: var(--color-green);
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.55);
  flex: 0 0 auto;
}

.brand-name {
  white-space: nowrap;
}

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

.nav-list li {
  display: block;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.4;
  white-space: nowrap;
}

.nav-list a:hover {
  color: var(--color-ink);
  background-color: var(--color-surface);
}

.nav-list a.is-current {
  color: var(--color-green);
  background-color: rgba(63, 125, 90, 0.1);
  font-weight: 600;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 4px;
  color: var(--color-muted);
  font-size: 13px;
}

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

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

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

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

/* 页面标题区 */
.page-header {
  padding: 16px 0 28px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 30px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-ink);
}

.page-description {
  margin-top: 12px;
  max-width: 78ch;
  color: var(--color-ink-soft);
  font-size: 16px;
}

.page-lead {
  margin-top: 10px;
  max-width: 78ch;
  color: var(--color-muted);
  font-size: 15px;
}

/* 通用标题组 */
.section-head {
  margin-bottom: 24px;
}

.section-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 10px;
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  color: var(--color-green);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.section-title {
  font-size: 23px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--color-ink);
}

.section-desc,
.section-intro,
.section-lead {
  margin-top: 10px;
  max-width: 76ch;
  color: var(--color-ink-soft);
  font-size: 15px;
}

.section-more {
  margin-top: 22px;
  font-size: 15px;
}

.section-more a {
  display: inline-block;
  min-height: 24px;
  font-weight: 600;
}

.section-note {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  font-size: 15px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-green);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #2f6347;
  color: #ffffff;
}

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

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

/* 图片容器 */
.hero-media,
.matrix-media,
.process-media,
.media-figure,
.content-figure,
.section-media,
.group-media {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.hero-media img,
.matrix-media img,
.process-media img,
.media-figure img,
.content-figure img,
.section-media img,
.group-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media figcaption,
.matrix-media figcaption,
.process-media figcaption,
.media-figure figcaption,
.content-figure figcaption,
.section-media figcaption,
.group-media figcaption {
  padding: 8px 12px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.6;
  border-top: 1px solid var(--color-line);
  background-color: var(--color-bg);
}

/* FAQ 折叠项 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.faq-question {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-green);
  border-bottom: 2px solid var(--color-green);
  transform: rotate(-45deg);
  transition: transform 0.18s ease;
}

.faq-item[open] .faq-question::before {
  transform: rotate(45deg);
}

.faq-question:hover {
  background-color: var(--color-surface);
}

.faq-answer {
  padding: 0 16px 16px 34px;
  color: var(--color-ink-soft);
  font-size: 15px;
}

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

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

/* 侧栏通用 */
.sidebar-block,
.side-block {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
}

.sidebar-block + .sidebar-block,
.side-block + .side-block {
  margin-top: 18px;
}

.sidebar-title,
.side-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.sidebar-text,
.side-note,
.sidebar-note {
  color: var(--color-ink-soft);
  font-size: 14px;
}

.sidebar-list,
.side-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-list a,
.side-list a {
  display: block;
  min-height: 32px;
  padding: 5px 0;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.6;
  border-bottom: 1px dashed var(--color-line);
}

.sidebar-list li:last-child a,
.side-list li:last-child a {
  border-bottom: 0;
}

.sidebar-list a:hover,
.side-list a:hover {
  color: var(--color-green);
}

.sidebar-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.sidebar-tag {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  color: var(--color-ink-soft);
  font-size: 13px;
  line-height: 1.6;
}

/* 页脚 */
.footer-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.footer-intro {
  margin-top: 10px;
  max-width: 42ch;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

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

.footer-list a {
  display: inline-block;
  min-height: 24px;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.footer-list a:hover {
  color: var(--color-green);
}

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

.footer-update {
  margin-top: 10px;
  font-size: 14px;
}

/* ============ pages: index ============ */
.home-main {
  display: block;
}

.hero-section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 40px;
}

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

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

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 12px;
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  color: var(--color-green);
  font-size: 13px;
  line-height: 1.7;
}

.hero-title {
  font-size: 34px;
  line-height: 1.32;
  font-weight: 700;
  color: var(--color-ink);
}

.hero-lead {
  margin-top: 16px;
  max-width: 46ch;
  color: var(--color-ink-soft);
  font-size: 16px;
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

.matrix-section,
.process-section,
.cases-section,
.faq-section,
.index-section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 44px 24px;
  border-top: 1px solid var(--color-line);
}

/* 服务矩阵概览 */
.matrix-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.matrix-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 24px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
}

.matrix-item:nth-child(even) {
  background-color: var(--color-surface);
}

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

.matrix-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}

.matrix-target {
  margin-top: 8px;
  color: var(--color-green);
  font-size: 14px;
}

.matrix-desc {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 15px;
}

.matrix-media {
  aspect-ratio: 3 / 2;
}

.matrix-media img {
  aspect-ratio: 3 / 2;
}

/* 合作流程四阶段预览 */
.process-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-step {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-green);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
}

.process-step .step-index {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--color-earth);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.process-step .step-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
}

.process-step .step-client,
.process-step .step-output {
  margin-top: 10px;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.process-media {
  margin-top: 24px;
  aspect-ratio: 21 / 8;
}

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

/* 案例摘要入口 */
.cases-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cases-item {
  padding: 18px 20px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-blue);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
}

.cases-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
}

.cases-direction {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 15px;
}

.cases-focus {
  margin-top: 6px;
  color: var(--color-muted);
  font-size: 14px;
}

/* 站内页面索引 */
.index-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

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

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

.index-desc {
  margin-top: 8px;
  flex: 1 1 auto;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.index-link {
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
}

/* ============ pages: inner shared ============ */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

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

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

.content-section,
.section,
.faq-group,
.services-overview,
.services-detail,
.services-boundary {
  margin-bottom: 40px;
}

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

/* ============ pages: services ============ */
.page-services .media-figure {
  margin-top: 18px;
  aspect-ratio: 16 / 9;
}

.page-services .media-figure img {
  aspect-ratio: 16 / 9;
}

.table-wrap {
  margin-top: 22px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.matrix-table {
  min-width: 560px;
  font-size: 15px;
}

.matrix-caption {
  padding: 12px 16px;
  text-align: left;
  color: var(--color-muted);
  font-size: 13px;
  border-bottom: 1px solid var(--color-line);
  background-color: var(--color-surface);
}

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

.matrix-table thead th {
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-weight: 700;
  font-size: 14px;
}

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

.matrix-table tbody th {
  color: var(--color-ink);
  font-weight: 600;
}

.matrix-table td {
  color: var(--color-ink-soft);
}

.service-entry {
  padding: 22px 0;
  border-top: 1px solid var(--color-line);
}

.service-entry:first-of-type {
  border-top: 0;
  padding-top: 6px;
}

.service-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-ink);
}

.service-entry .media-figure {
  margin-top: 16px;
  aspect-ratio: 16 / 9;
}

.service-entry .media-figure img {
  aspect-ratio: 16 / 9;
}

.service-meta {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 8px 16px;
}

.service-meta dt {
  color: var(--color-green);
  font-size: 14px;
  font-weight: 600;
}

.service-meta dd {
  color: var(--color-ink-soft);
  font-size: 15px;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.boundary-item {
  padding: 16px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.boundary-name,
.boundary-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.boundary-text {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 15px;
}

.boundary-note {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  font-size: 15px;
}

/* ============ pages: process ============ */
.page-process .content-figure {
  margin-top: 18px;
  aspect-ratio: 16 / 9;
}

.page-process .content-figure img {
  aspect-ratio: 16 / 9;
}

.stage-strip {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

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

.stage-item .stage-index {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--color-earth);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.stage-item .stage-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.stage-item .stage-desc {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.stage-row {
  padding: 20px 0;
  border-top: 1px solid var(--color-line);
}

.stage-row:first-of-type {
  border-top: 0;
  padding-top: 8px;
}

.stage-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.stage-head .stage-index {
  color: var(--color-earth);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.stage-head .stage-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}

.stage-body {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.stage-col {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
}

.stage-col-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-green);
  margin-bottom: 8px;
}

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

.prepare-card {
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.prepare-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.prepare-text {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
}

/* ============ pages: cases ============ */
.demand-tag-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.demand-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.7;
  border: 1px solid transparent;
}

.demand-tag-green {
  color: #2f6347;
  background-color: rgba(63, 125, 90, 0.12);
  border-color: rgba(63, 125, 90, 0.3);
}

.demand-tag-earth {
  color: #8d5f22;
  background-color: rgba(201, 138, 58, 0.14);
  border-color: rgba(201, 138, 58, 0.32);
}

.demand-tag-blue {
  color: #3f5d7d;
  background-color: rgba(90, 127, 168, 0.14);
  border-color: rgba(90, 127, 168, 0.32);
}

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

.demand-type-item {
  min-width: 0;
}

.demand-type-card {
  height: 100%;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
}

.demand-type-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
}

.demand-type-desc {
  margin-top: 8px;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.section-media {
  margin-top: 20px;
  aspect-ratio: 16 / 9;
}

.section-media img {
  aspect-ratio: 16 / 9;
}

.scenario-list {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scenario-row {
  padding: 18px 20px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-blue);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
}

.scenario-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.scenario-index {
  color: var(--color-blue);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.scenario-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
}

.scenario-body {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.scenario-key {
  display: block;
  margin-bottom: 4px;
  color: var(--color-green);
  font-size: 13px;
  font-weight: 600;
}

.scenario-bg,
.scenario-way,
.scenario-focus {
  min-width: 0;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.fit-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  counter-reset: fit;
}

.fit-item {
  position: relative;
  padding: 16px 18px 16px 52px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.fit-item::before {
  counter-increment: fit;
  content: counter(fit, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 16px;
  color: var(--color-earth);
  font-size: 14px;
  font-weight: 700;
}

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

.fit-desc {
  margin-top: 6px;
  color: var(--color-ink-soft);
  font-size: 15px;
}

.related-links {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--color-line);
}

.related-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 10px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.related-list a {
  display: inline-block;
  min-height: 32px;
  font-size: 15px;
  font-weight: 600;
}

/* ============ pages: faq ============ */
.faq-group .section-head {
  margin-bottom: 16px;
}

.faq-group .group-media {
  margin-bottom: 20px;
  aspect-ratio: 16 / 9;
}

.faq-group .group-media img {
  aspect-ratio: 16 / 9;
}

/* ============ pages: 404 ============ */
.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px 72px;
}

.error-hero {
  max-width: 62ch;
}

.error-code {
  color: var(--color-earth);
  font-size: 14px;
  letter-spacing: 0.1em;
}

.error-hero h1 {
  margin-top: 10px;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-ink);
}

.error-text {
  margin-top: 14px;
  color: var(--color-ink-soft);
  font-size: 16px;
}

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

.error-links {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--color-line);
}

.error-links h2 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-ink);
}

.error-link-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.error-link-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: 15px;
}

.error-link-list a:hover {
  border-color: var(--color-green);
  color: var(--color-green);
}

/* ============ responsive ============ */
@media (max-width: 900px) {
  .header-inner {
    padding: 0 18px;
    gap: 14px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-left: 0;
    padding: 10px 18px 16px;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-card);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

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

  .nav-list a {
    min-height: 44px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    font-size: 16px;
  }

  .hero-section,
  .matrix-section,
  .process-section,
  .cases-section,
  .faq-section,
  .index-section {
    padding: 32px 18px;
  }

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

  .hero-title {
    font-size: 28px;
  }

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

  .matrix-media {
    aspect-ratio: 16 / 9;
  }

  .matrix-media img {
    aspect-ratio: 16 / 9;
  }

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

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

  .inner-main {
    padding: 0 18px 56px;
  }

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

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

  .stage-body,
  .prepare-grid,
  .demand-type-list,
  .scenario-body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 36px 18px 28px;
  }

  .footer-copy {
    padding: 20px 18px 28px;
  }
}

@media (max-width: 600px) {
  body.site-body {
    font-size: 15px;
  }

  .top-notice p,
  .topbar .topbar-text,
  .top-bar .top-bar-text {
    padding: 8px 14px;
    font-size: 12px;
  }

  .brand {
    font-size: 16px;
  }

  .header-inner {
    padding: 0 14px;
  }

  .site-nav {
    padding: 10px 14px 14px;
  }

  .hero-section,
  .matrix-section,
  .process-section,
  .cases-section,
  .faq-section,
  .index-section {
    padding: 26px 14px;
  }

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

  .hero-lead {
    font-size: 15px;
  }

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

  .section-title {
    font-size: 20px;
  }

  .process-track,
  .index-grid,
  .stage-strip,
  .stage-body,
  .prepare-grid,
  .demand-type-list,
  .scenario-body,
  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .inner-main {
    padding: 0 14px 48px;
  }

  .page-title {
    font-size: 23px;
  }

  .page-header {
    padding: 12px 0 22px;
    margin-bottom: 24px;
  }

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

  .service-meta dd {
    margin-bottom: 10px;
  }

  .faq-answer {
    padding: 0 14px 14px 14px;
  }

  .fit-item {
    padding: 14px 14px 14px 44px;
  }

  .fit-item::before {
    left: 14px;
    top: 14px;
  }

  .error-main {
    padding: 40px 14px 52px;
  }

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

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 30px 14px 24px;
    gap: 24px;
  }

  .footer-copy {
    padding: 18px 14px 24px;
  }
}