/* ============================================================
   base / 基础样式
   ============================================================ */
:root {
  --color-ink: #1f2937;
  --color-bg: #f8fafc;
  --color-blue: #2563eb;
  --color-border: #e2e8f0;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-white: #ffffff;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-wide: 1200px;
  --container-narrow: 720px;
  --radius-card: 8px;
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-card-hover: 0 8px 20px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.05);
  --header-height: 68px;
  --transition-base: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-blue);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: #1d4ed8;
}

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0.75rem;
}

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

/* ============================================================
   layout / 全站骨架
   ============================================================ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text);
}

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

.home-main {
  width: 100%;
}

.inner-main {
  width: 100%;
  padding-bottom: 64px;
}

/* ============================================================
   components / 页头与导航
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

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

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0;
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  gap: 4px;
}

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

.site-nav {
  display: block;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 6px;
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-link:hover {
  color: var(--color-blue);
  background-color: rgba(37, 99, 235, 0.06);
}

.nav-item.is-current .nav-link,
.nav-link.is-current {
  color: var(--color-blue);
  font-weight: 600;
}

.nav-item.is-current .nav-link::after,
.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-blue);
  border-radius: 2px;
}

/* ============================================================
   components / 面包屑
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: var(--color-text-light);
}

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

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

.breadcrumb-sep {
  margin: 0 8px;
  color: #94a3b8;
}

.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 500;
}

/* ============================================================
   components / 页头标题区
   ============================================================ */
.page-header {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 32px 24px 8px;
}

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

.page-description {
  max-width: 720px;
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ============================================================
   components / 按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.btn-primary {
  background-color: var(--color-blue);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: #1d4ed8;
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-ink);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-blue);
  color: var(--color-blue);
}

/* ============================================================
   components / 卡片通用
   ============================================================ */
.service-card,
.scope-item,
.faq-category-card,
.role-card,
.deliverable-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover,
.role-card:hover,
.deliverable-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

/* ============================================================
   components / 首页 hero
   ============================================================ */
.hero-section {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.hero-content,
.hero-media {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.hero-content {
  padding-top: 56px;
  padding-bottom: 40px;
  text-align: center;
  max-width: 720px;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

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

.hero-media {
  padding-bottom: 48px;
  max-width: 960px;
}

.hero-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

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

/* ============================================================
   components / 首页通用 section
   ============================================================ */
.services-overview,
.audience-scope,
.process-preview,
.deliverables-preview,
.faq-entry,
.pre-footer-cta {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 56px 24px;
}

.services-overview {
  padding-top: 64px;
}

.section-heading {
  margin-bottom: 32px;
}

.section-heading h2 {
  margin-bottom: 8px;
}

.section-sub {
  color: var(--color-text-light);
  font-size: 15px;
  max-width: 640px;
}

/* ============================================================
   components / 首页服务矩阵
   ============================================================ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.service-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid var(--color-border);
}

.service-card h3 {
  padding: 16px 16px 4px;
  font-size: 17px;
}

.service-card p {
  padding: 0 16px;
  font-size: 14px;
  color: var(--color-text-light);
  flex: 1 0 auto;
  margin-bottom: 8px;
}

.card-link {
  display: inline-block;
  padding: 8px 16px 16px;
  font-size: 14px;
  font-weight: 600;
}

/* ============================================================
   components / 首页适用场景
   ============================================================ */
.audience-scope {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

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

.scope-inner h2 {
  margin-bottom: 8px;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.scope-item {
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.scope-item h3 {
  margin-bottom: 8px;
}

.scope-item p {
  font-size: 14px;
  color: var(--color-text-light);
  flex: 1 0 auto;
  margin-bottom: 16px;
}

.scope-link {
  font-size: 14px;
  font-weight: 600;
}

/* ============================================================
   components / 首页合作流程预览
   ============================================================ */
.process-preview {
  padding-top: 56px;
}

.process-preview h2 {
  margin-bottom: 8px;
}

.process-preview .section-sub {
  margin-bottom: 32px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--color-blue);
  font-size: 15px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.step-meta {
  font-size: 13px;
  color: var(--color-text-light);
}

.section-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
}

/* ============================================================
   components / 首页成果形式预览
   ============================================================ */
.deliverables-preview {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

.deliverables-layout {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.deliverables-col h2 {
  margin-bottom: 16px;
}

.deliverables-list li {
  position: relative;
  padding-left: 20px;
  padding-bottom: 8px;
  font-size: 15px;
  color: var(--color-text);
}

.deliverables-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--color-blue);
  border-radius: 2px;
}

.deliverables-preview .section-link {
  margin-top: 24px;
  display: inline-block;
}

/* ============================================================
   components / 首页 FAQ 入口
   ============================================================ */
.faq-entry h2 {
  margin-bottom: 8px;
}

.faq-entry .section-sub {
  margin-bottom: 32px;
}

.faq-category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.faq-category-card {
  display: block;
  padding: 20px;
  color: var(--color-text);
}

.faq-category-card:hover {
  color: var(--color-text);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.faq-category-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.faq-category-card p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ============================================================
   components / 首页页脚前引导带
   ============================================================ */
.pre-footer-cta {
  padding-top: 32px;
  padding-bottom: 64px;
}

.cta-banner {
  background-color: var(--color-ink);
  border-radius: var(--radius-card);
  padding: 40px;
  text-align: center;
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: 8px;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
  max-width: 600px;
  margin: 0 auto 24px;
}

.cta-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-banner .btn-primary {
  background-color: var(--color-white);
  color: var(--color-ink);
}

.cta-banner .btn-primary:hover {
  background-color: #f1f5f9;
  color: var(--color-ink);
}

.cta-banner .btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.cta-banner .btn-secondary:hover {
  border-color: var(--color-white);
  color: var(--color-white);
}

/* ============================================================
   components / 页脚
   ============================================================ */
.site-footer {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

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

.footer-heading {
  font-size: 15px;
  margin-bottom: 12px;
}

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

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

.footer-links a:hover {
  color: var(--color-blue);
}

.footer-bottom {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 24px;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.copyright,
.brand-tagline {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ============================================================
   pages / 服务项目页
   ============================================================ */
.services-grid-section {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 24px 24px 56px;
}

.section-title {
  margin-bottom: 8px;
}

.section-intro {
  color: var(--color-text-light);
  margin-bottom: 32px;
  max-width: 640px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-media {
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.service-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.service-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.service-name {
  font-size: 17px;
  margin-bottom: 6px;
}

.service-desc {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.service-meta {
  margin-top: auto;
}

.meta-row {
  display: flex;
  gap: 8px;
  font-size: 13px;
  padding: 6px 0;
  border-top: 1px solid var(--color-border);
}

.meta-row dt {
  font-weight: 600;
  color: var(--color-ink);
  flex-shrink: 0;
}

.meta-row dd {
  color: var(--color-text-light);
}

.audience-guide,
.cooperate-guide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 32px;
}

.guide-content {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.guide-title {
  font-size: 18px;
  flex-shrink: 0;
}

.guide-text {
  font-size: 14px;
  color: var(--color-text-light);
  flex: 1 1 280px;
  margin-bottom: 0;
}

.guide-link {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

/* ============================================================
   pages / 适用对象页
   ============================================================ */
.role-scene-section,
.cooperation-mode-section {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 24px 24px 48px;
}

.role-scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.role-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.role-media {
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.role-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.role-title {
  padding: 16px 16px 4px;
  font-size: 17px;
}

.role-desc {
  padding: 0 16px;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.role-cooperation {
  padding: 0 16px;
  font-size: 14px;
  margin-bottom: 8px;
}

.role-cooperation strong {
  color: var(--color-ink);
}

.role-link {
  display: inline-block;
  padding: 8px 16px 16px;
  font-size: 14px;
  font-weight: 600;
  margin-top: auto;
}

.mode-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.mode-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.mode-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.mode-text {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.cooperate-cta-banner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.banner-content {
  background-color: var(--color-ink);
  border-radius: var(--radius-card);
  padding: 32px;
  text-align: center;
}

.banner-title {
  color: var(--color-white);
  font-size: 20px;
  margin-bottom: 8px;
}

.banner-text {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  max-width: 560px;
  margin: 0 auto 20px;
}

.banner-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 6px;
  background-color: var(--color-white);
  color: var(--color-ink);
  margin: 0 6px;
}

.banner-link:hover {
  background-color: #f1f5f9;
  color: var(--color-ink);
}

/* ============================================================
   pages / 工作步骤页
   ============================================================ */
.section {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 24px 24px 48px;
}

.section-subtitle {
  color: var(--color-text-light);
  font-size: 15px;
  margin-bottom: 24px;
}

.process-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.process-stage {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.stage-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.stage-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--color-blue);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.stage-title {
  font-size: 15px;
  margin-bottom: 0;
}

.stage-body p {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.stage-body p strong {
  color: var(--color-ink);
  font-weight: 600;
}

.process-figure {
  margin-top: 32px;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.process-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.process-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-white);
}

.stage-table-wrap {
  overflow-x: auto;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.stage-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.stage-table th,
.stage-table td {
  padding: 12px 16px;
  font-size: 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.stage-table th {
  background-color: #f1f5f9;
  color: var(--color-ink);
  font-weight: 600;
}

.stage-table tr:last-child td {
  border-bottom: none;
}

.section-cooperate-reminder {
  padding-bottom: 56px;
}

.reminder-content {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px;
  text-align: center;
}

.reminder-title {
  font-size: 20px;
  margin-bottom: 8px;
}

.reminder-text {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto 20px;
}

.reminder-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 6px;
  background-color: var(--color-blue);
  color: var(--color-white);
}

.link-btn:hover {
  background-color: #1d4ed8;
  color: var(--color-white);
}

.link-text {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-blue);
}

/* ============================================================
   pages / 成果形式页
   ============================================================ */
.deliverables-module {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 24px 24px 48px;
}

.deliverables-module h2 {
  margin-bottom: 16px;
}

.content-media-inline {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 24px;
}

.content-media-inline img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.content-media-inline figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-white);
}

.deliverables-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.deliverable-item {
  padding: 20px;
}

.deliverable-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.deliverable-content {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.acceptance-criteria {
  font-size: 13px;
  color: var(--color-text);
  background-color: #f1f5f9;
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 0;
}

.acceptance-process {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.acceptance-process h2 {
  margin-bottom: 12px;
}

.acceptance-intro {
  font-size: 15px;
  color: var(--color-text);
  max-width: 720px;
  margin-bottom: 8px;
}

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

.inner-guide-banner h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.inner-guide-banner p {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 640px;
}

.inner-guide-banner a {
  font-weight: 600;
}

.related-links {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 56px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

.related-links-item {
  font-size: 14px;
  font-weight: 500;
}

/* ============================================================
   pages / 合作准备页
   ============================================================ */
.cooperate-figure {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 24px 24px 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.cooperate-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.cooperate-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-white);
}

.prepare-section,
.requirement-section {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.prepare-group {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.prepare-group-title {
  font-size: 16px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.prepare-list li {
  position: relative;
  padding-left: 20px;
  padding-bottom: 6px;
  font-size: 14px;
  color: var(--color-text);
}

.prepare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background-color: var(--color-blue);
  border-radius: 2px;
}

.requirement-section p {
  font-size: 15px;
  max-width: 720px;
  margin-bottom: 8px;
}

.guide-banner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.guide-banner p {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.guide-link {
  font-weight: 600;
  white-space: nowrap;
}

/* ============================================================
   pages / FAQ 页
   ============================================================ */
.faq-guide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 24px 24px 32px;
}

.faq-guide-figure {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.faq-guide-image {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.faq-guide-caption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  background-color: var(--color-white);
}

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

.faq-category {
  margin-bottom: 32px;
}

.faq-category-name {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color var(--transition-base);
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--color-blue);
  font-weight: 400;
  transition: transform var(--transition-base);
}

.faq-item[open] .faq-question::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item[open] .faq-question {
  color: var(--color-blue);
}

.faq-answer {
  padding: 0 20px 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.faq-answer a {
  font-size: 14px;
  font-weight: 500;
  margin-right: 16px;
}

.faq-related {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.related-guide-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-guide-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
}

.related-guide-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.related-guide-desc {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ============================================================
   pages / 404 页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-content {
  text-align: center;
  max-width: 560px;
}

.error-content h1 {
  font-size: 48px;
  color: var(--color-blue);
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  background-color: var(--color-blue);
  color: var(--color-white);
}

.error-home-link:hover {
  background-color: #1d4ed8;
  color: var(--color-white);
}

/* ============================================================
   responsive / 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .service-grid,
  .services-grid,
  .role-scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
  }

  .faq-category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .related-guide-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .deliverables-list {
    grid-template-columns: 1fr;
  }

  .deliverables-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 16px rgba(15, 23, 42, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
  }

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

  .nav-item {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-item:last-child {
    border-bottom: none;
  }

  .nav-link {
    display: block;
    padding: 14px 8px;
    font-size: 16px;
  }

  .nav-item.is-current .nav-link::after,
  .nav-link.is-current::after {
    display: none;
  }

  .breadcrumb {
    padding: 12px 16px 0;
  }

  .page-header {
    padding: 24px 16px 8px;
  }

  .hero-content {
    padding: 40px 16px 24px;
  }

  .hero-media {
    padding: 0 16px 32px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    max-width: 320px;
    margin: 0 auto;
  }

  .services-overview,
  .process-preview,
  .faq-entry,
  .pre-footer-cta {
    padding: 40px 16px;
  }

  .services-overview {
    padding-top: 48px;
  }

  .scope-inner {
    padding: 0 16px;
  }

  .deliverables-layout {
    padding: 0 16px;
  }

  .service-grid,
  .services-grid,
  .role-scene-grid {
    grid-template-columns: 1fr;
  }

  .scope-grid,
  .mode-list {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .process-timeline {
    grid-template-columns: 1fr;
  }

  .faq-category-grid {
    grid-template-columns: 1fr;
  }

  .related-guide-list {
    grid-template-columns: 1fr;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    padding: 0 16px 16px;
    flex-direction: column;
    text-align: center;
  }

  .cta-banner {
    padding: 32px 24px;
  }

  .guide-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .banner-content {
    padding: 24px;
  }

  .reminder-content {
    padding: 24px;
  }

  .section {
    padding: 16px 16px 40px;
  }

  .services-grid-section,
  .role-scene-section,
  .cooperation-mode-section,
  .deliverables-module,
  .acceptance-process,
  .inner-guide-banner,
  .related-links,
  .prepare-section,
  .requirement-section,
  .guide-banner,
  .faq-guide,
  .faq-section,
  .faq-related {
    padding-left: 16px;
    padding-right: 16px;
  }

  .cooperate-figure {
    margin-left: 16px;
    margin-right: 16px;
  }

  .page-header {
    padding-left: 16px;
    padding-right: 16px;
  }
}

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

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 17px;
  }

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

  .deliverable-item,
  .scope-item,
  .step-item,
  .process-stage,
  .faq-category-card,
  .mode-item,
  .related-guide-item {
    padding: 16px;
  }

  .process-figure img,
  .content-media-inline img,
  .cooperate-figure img,
  .faq-guide-image {
    aspect-ratio: 4 / 3;
  }
}