/* ==========================================================================
   51吃瓜轻量 - 整站样式表
   社区市集风：暖纸底、多色分类标签、紧凑条目、明确边界
   ========================================================================== */

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #24262b;
  background-color: #faf6ef;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #2f6f5e;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #d9553c;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.35;
  color: #24262b;
  font-weight: 600;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0.75em;
}

/* --------------------------------------------------------------------------
   Layout / 全站骨架
   -------------------------------------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e8e2d8;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: #24262b;
  letter-spacing: 0.5px;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand:hover {
  color: #d9553c;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.site-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: #4a4d55;
  border-radius: 4px;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav a:hover {
  color: #d9553c;
  background-color: #faf6ef;
}

.site-nav a.is-current {
  color: #d9553c;
  font-weight: 600;
  background-color: #fdf3ee;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid #e0d9cc;
  background-color: #ffffff;
  border-radius: 6px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #24262b;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.site-footer {
  background-color: #24262b;
  color: #c9ccd2;
  margin-top: auto;
}

.footer-cols {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.footer-col h2 {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 14px;
}

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

.footer-col a {
  color: #aeb2ba;
  font-size: 14px;
  line-height: 1.6;
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-col p {
  font-size: 14px;
  color: #aeb2ba;
  line-height: 1.7;
  margin-bottom: 0;
}

.footer-bottom {
  border-top: 1px solid #3a3d44;
  padding: 18px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 14px;
  color: #8a8f98;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   首页布局
   -------------------------------------------------------------------------- */
.home-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 主题首屏 */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 64px 0 56px;
}

.hero-content h1 {
  font-size: 40px;
  line-height: 1.3;
  margin-bottom: 20px;
  color: #24262b;
}

.hero-lead {
  font-size: 17px;
  color: #4a4d55;
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-directory {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.dir-link {
  display: block;
  padding: 12px 16px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  color: #24262b;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.dir-link:hover {
  border-color: #d9553c;
  color: #d9553c;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(36, 38, 43, 0.06);
}

.hero-figure {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(36, 38, 43, 0.08);
}

.hero-figure img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

/* 核心事实条 */
.fact-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 28px 24px;
  margin-bottom: 64px;
}

.fact-item h2 {
  font-size: 16px;
  font-weight: 600;
  color: #24262b;
  margin-bottom: 6px;
}

.fact-item p {
  font-size: 14px;
  color: #6b6f78;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 通用区块 */
.section-block {
  margin-bottom: 64px;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: 26px;
  margin-bottom: 6px;
}

.section-heading p {
  font-size: 15px;
  color: #6b6f78;
  margin-bottom: 0;
}

/* 服务范围矩阵 */
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scope-card {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px 20px;
  border-top: 4px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.scope-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(36, 38, 43, 0.06);
}

.scope-card--diagnosis {
  border-top-color: #d9553c;
}

.scope-card--design {
  border-top-color: #2f6f5e;
}

.scope-card--implement {
  border-top-color: #3b6ea5;
}

.scope-card--iterate {
  border-top-color: #e7b64c;
}

.scope-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.scope-card p {
  font-size: 14px;
  color: #6b6f78;
  line-height: 1.7;
  margin-bottom: 14px;
}

.scope-tag {
  display: inline-block;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 4px;
  background-color: #faf6ef;
  color: #4a4d55;
  font-weight: 500;
}

/* 场景预览 */
.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scenario-item {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  align-items: center;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.scenario-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(36, 38, 43, 0.05);
}

.scenario-item img {
  width: 240px;
  height: 140px;
  object-fit: cover;
  border-radius: 6px;
}

.scenario-text h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.scenario-text p {
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 8px;
}

.text-link {
  font-size: 14px;
  font-weight: 500;
  color: #2f6f5e;
}

.text-link:hover {
  color: #d9553c;
}

/* 流程预览 */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.step {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px 20px;
  text-align: center;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #d9553c;
  color: #ffffff;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 12px;
}

.step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.step p {
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 0;
  line-height: 1.6;
}

.section-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: #2f6f5e;
  padding: 8px 0;
}

.section-link:hover {
  color: #d9553c;
}

/* 交付标准摘要 */
.delivery-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 16px;
}

.delivery-col {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px;
}

.delivery-col h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.delivery-col p {
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 0;
  line-height: 1.7;
}

/* FAQ 预览 */
.faq-preview {
  max-width: 820px;
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: #d9553c;
  font-weight: 400;
}

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

.faq-item summary:hover {
  color: #d9553c;
}

.faq-item p {
  padding: 0 20px 18px;
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 0;
}

.faq-item .text-link {
  display: block;
  padding: 0 20px 18px;
}

/* 下一步入口 */
.next-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.next-card {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.next-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(36, 38, 43, 0.06);
}

.next-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.next-card p {
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 16px;
  line-height: 1.7;
}

.button-link {
  display: inline-block;
  padding: 10px 20px;
  background-color: #d9553c;
  color: #ffffff;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.button-link:hover {
  background-color: #c74a33;
  color: #ffffff;
}

/* 首页相关链接 */
.related-links {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0 48px;
  border-top: 1px solid #e8e2d8;
}

.related-links-label {
  font-size: 14px;
  color: #8a8f98;
  flex-shrink: 0;
}

.related-links-item {
  font-size: 14px;
  color: #2f6f5e;
  padding: 6px 12px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 4px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  border-color: #d9553c;
  color: #d9553c;
}

/* --------------------------------------------------------------------------
   内页布局
   -------------------------------------------------------------------------- */
.inner-main {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 14px;
  color: #8a8f98;
}

.breadcrumb a {
  color: #2f6f5e;
}

.breadcrumb a:hover {
  color: #d9553c;
}

.breadcrumb-sep {
  color: #c0c3ca;
}

.breadcrumb-current {
  color: #4a4d55;
}

.page-header {
  padding: 20px 0 12px;
}

.page-title {
  font-size: 32px;
  line-height: 1.35;
  margin-bottom: 0;
}

.page-heading {
  padding: 8px 0 24px;
}

.page-heading p {
  font-size: 16px;
  color: #4a4d55;
  line-height: 1.8;
  margin-bottom: 0;
}

/* 本页目录 */
.page-toc {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 40px;
}

.page-toc ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.page-toc a {
  font-size: 14px;
  color: #2f6f5e;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-toc a:hover {
  color: #d9553c;
  border-bottom-color: #d9553c;
}

/* 内容区块 */
.content-section {
  margin-bottom: 48px;
}

.content-section h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.content-section > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 16px;
}

/* 服务范围页 */
.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.service-card {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 0;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(36, 38, 43, 0.06);
}

.service-color-bar {
  height: 6px;
}

.service-card-orange .service-color-bar {
  background-color: #d9553c;
}

.service-card-green .service-color-bar {
  background-color: #2f6f5e;
}

.service-card-blue .service-color-bar {
  background-color: #3b6ea5;
}

.service-card-yellow .service-color-bar {
  background-color: #e7b64c;
}

.service-card h3 {
  font-size: 18px;
  padding: 20px 20px 0;
  margin-bottom: 6px;
}

.service-stage {
  font-size: 13px;
  color: #8a8f98;
  padding: 0 20px;
  margin-bottom: 10px;
  font-weight: 500;
}

.service-card p:not(.service-stage):not(.service-note) {
  font-size: 14px;
  color: #4a4d55;
  padding: 0 20px;
  line-height: 1.7;
  margin-bottom: 10px;
}

.service-note {
  font-size: 13px;
  color: #8a8f98;
  padding: 0 20px 20px;
  line-height: 1.6;
  margin-bottom: 0;
  border-top: 1px dashed #e8e2d8;
  margin-top: 10px;
  padding-top: 12px;
}

.service-flow-figure {
  margin-bottom: 32px;
}

.service-flow-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: 8px;
}

.service-flow-figure figcaption {
  font-size: 13px;
  color: #8a8f98;
  padding: 10px 4px 0;
  text-align: center;
}

/* 边界表格 */
.boundary-table-wrap {
  overflow-x: auto;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  background-color: #ffffff;
}

.boundary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.boundary-table th,
.boundary-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid #f0ece4;
  vertical-align: top;
}

.boundary-table th {
  background-color: #faf6ef;
  font-weight: 600;
  color: #24262b;
}

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

.boundary-table td {
  color: #4a4d55;
  line-height: 1.7;
}

/* 内页底部相关链接 */
aside.related-links {
  border-top: 1px solid #e8e2d8;
  padding: 32px 0;
  margin-bottom: 48px;
}

aside.related-links h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.related-card {
  display: block;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.related-card:hover {
  border-color: #d9553c;
  transform: translateY(-2px);
}

.related-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
  color: #24262b;
}

.related-card p {
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 0;
  line-height: 1.6;
}

.related-card:hover h3 {
  color: #d9553c;
}

/* 内页底部相关链接列表形式 */
.inner-main > .related-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.inner-main > .related-links a {
  font-size: 15px;
  color: #2f6f5e;
  padding: 8px 0;
  border-bottom: 1px solid #f0ece4;
  display: block;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.inner-main > .related-links a:hover {
  color: #d9553c;
  padding-left: 6px;
}

/* --------------------------------------------------------------------------
   合作流程页
   -------------------------------------------------------------------------- */
.stage-overview {
  margin-bottom: 48px;
}

.stage-overview h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.stage-figure {
  margin-bottom: 16px;
}

.stage-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 8px;
}

.stage-overview p {
  font-size: 15px;
  color: #4a4d55;
}

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

.stage-details > h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.stage-details > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 24px;
}

.stage-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.stage-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: #d9553c;
  color: #ffffff;
  font-size: 22px;
  font-weight: 700;
}

.stage-item-2 .stage-number {
  background-color: #2f6f5e;
}

.stage-item-3 .stage-number {
  background-color: #3b6ea5;
}

.stage-item-4 .stage-number {
  background-color: #e7b64c;
  color: #24262b;
}

.stage-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.stage-content > p {
  font-size: 14px;
  color: #4a4d55;
  margin-bottom: 12px;
}

.stage-actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stage-actions li {
  font-size: 14px;
  color: #6b6f78;
  padding-left: 20px;
  position: relative;
  line-height: 1.7;
}

.stage-actions li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.85em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #d9553c;
}

.stage-item-2 .stage-actions li::before {
  background-color: #2f6f5e;
}

.stage-item-3 .stage-actions li::before {
  background-color: #3b6ea5;
}

.stage-item-4 .stage-actions li::before {
  background-color: #e7b64c;
}

/* 资料准备清单 */
.preparation-checklist {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 48px;
}

.preparation-checklist h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.preparation-checklist > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 20px;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.checklist li {
  font-size: 15px;
  color: #4a4d55;
  padding-left: 32px;
  position: relative;
  line-height: 1.7;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.25em;
  width: 20px;
  height: 20px;
  border: 2px solid #2f6f5e;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   场景参考页
   -------------------------------------------------------------------------- */
.scene-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 48px;
}

.intro-text p {
  font-size: 15px;
  color: #4a4d55;
  line-height: 1.8;
  margin-bottom: 0;
}

.scene-main-figure {
  border-radius: 8px;
  overflow: hidden;
}

.scene-main-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.scene-main-figure figcaption {
  font-size: 13px;
  color: #8a8f98;
  padding: 10px 4px 0;
  text-align: center;
}

.scene-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 28px 24px;
  margin-bottom: 20px;
}

.scene-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: #3b6ea5;
  color: #ffffff;
  font-size: 22px;
  font-weight: 700;
}

.scene-item:nth-child(4) .scene-number {
  background-color: #2f6f5e;
}

.scene-item:nth-child(5) .scene-number {
  background-color: #e7b64c;
  color: #24262b;
}

.scene-content h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.problem-box,
.solution-box,
.boundary-box {
  margin-bottom: 16px;
}

.problem-box h3,
.solution-box h3,
.boundary-box h3 {
  font-size: 15px;
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid #f0ece4;
}

.problem-box h3 {
  color: #d9553c;
}

.solution-box h3 {
  color: #2f6f5e;
}

.boundary-box h3 {
  color: #3b6ea5;
}

.problem-box p,
.solution-box p,
.boundary-box p {
  font-size: 14px;
  color: #4a4d55;
  margin-bottom: 0;
  line-height: 1.7;
}

/* 对应关系表 */
.scene-mapping {
  margin-bottom: 48px;
}

.scene-mapping h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

.scene-mapping table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  overflow: hidden;
}

.scene-mapping th,
.scene-mapping td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid #f0ece4;
}

.scene-mapping th {
  background-color: #faf6ef;
  font-weight: 600;
}

.scene-mapping tr:last-child td {
  border-bottom: none;
}

.scene-mapping td {
  color: #4a4d55;
}

.mapping-note {
  font-size: 14px;
  color: #8a8f98;
  margin-top: 14px;
  margin-bottom: 0;
}

/* 场景页底部相关链接 */
.scene-mapping + .related-links {
  border-top: 1px solid #e8e2d8;
  padding: 32px 0;
  margin-bottom: 48px;
}

.scene-mapping + .related-links h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.scene-mapping + .related-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.scene-mapping + .related-links a {
  font-size: 15px;
  color: #2f6f5e;
  padding: 6px 0;
  display: block;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.scene-mapping + .related-links a:hover {
  color: #d9553c;
  padding-left: 6px;
}

/* --------------------------------------------------------------------------
   交付标准页
   -------------------------------------------------------------------------- */
.delivery-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 48px;
}

.delivery-figure {
  border-radius: 8px;
  overflow: hidden;
}

.delivery-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.delivery-figure figcaption {
  font-size: 13px;
  color: #8a8f98;
  padding: 10px 4px 0;
  text-align: center;
}

.delivery-intro > p {
  font-size: 15px;
  color: #4a4d55;
  line-height: 1.8;
  margin-bottom: 0;
}

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

.delivery-section h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.delivery-section > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 20px;
}

.deliverable-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.deliverable-card {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 20px;
  border-left: 4px solid #3b6ea5;
}

.deliverable-card:nth-child(2) {
  border-left-color: #2f6f5e;
}

.deliverable-card:nth-child(3) {
  border-left-color: #e7b64c;
}

.deliverable-card:nth-child(4) {
  border-left-color: #d9553c;
}

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

.deliverable-card p {
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 0;
  line-height: 1.7;
}

.acceptance-list {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px 32px;
  margin-bottom: 16px;
  counter-reset: acceptance;
}

.acceptance-list li {
  font-size: 14px;
  color: #4a4d55;
  padding: 8px 0;
  padding-left: 36px;
  position: relative;
  line-height: 1.7;
  counter-increment: acceptance;
}

.acceptance-list li::before {
  content: counter(acceptance);
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: #2f6f5e;
  color: #ffffff;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.iteration-rules {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.iteration-rules p {
  font-size: 14px;
  color: #4a4d55;
  line-height: 1.7;
  margin-bottom: 0;
  padding-left: 20px;
  position: relative;
}

.iteration-rules p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #e7b64c;
}

.iteration-rules p strong {
  color: #24262b;
  font-weight: 600;
  margin-right: 4px;
}

/* 边界提醒框 */
.boundary-box {
  background-color: #fdf6ee;
  border: 1px solid #f0dfc8;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 48px;
}

.boundary-box h2 {
  font-size: 18px;
  margin-bottom: 10px;
  color: #a06a2a;
}

.boundary-box p {
  font-size: 14px;
  color: #6b5d4a;
  margin-bottom: 0;
  line-height: 1.7;
}

/* 交付页底部链接 */
.delivery-section + .boundary-box + .related-links {
  border-top: 1px solid #e8e2d8;
  padding: 32px 0;
  margin-bottom: 48px;
}

.delivery-section + .boundary-box + .related-links h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.delivery-section + .boundary-box + .related-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.delivery-section + .boundary-box + .related-links a {
  font-size: 15px;
  color: #2f6f5e;
  padding: 6px 0;
  display: block;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.delivery-section + .boundary-box + .related-links a:hover {
  color: #d9553c;
  padding-left: 6px;
}

/* --------------------------------------------------------------------------
   FAQ 页
   -------------------------------------------------------------------------- */
.faq-group {
  margin-bottom: 48px;
}

.faq-group > h2 {
  font-size: 22px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #f0ece4;
}

.faq-card {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-card details {
  border: none;
}

.faq-card summary {
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color 0.2s ease;
}

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

.faq-card summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: #d9553c;
  font-weight: 400;
}

.faq-card details[open] summary::after {
  content: "−";
}

.faq-card summary:hover {
  color: #d9553c;
}

.faq-answer {
  padding: 0 20px 18px;
  border-top: 1px solid #f0ece4;
}

.faq-answer p {
  font-size: 14px;
  color: #4a4d55;
  line-height: 1.8;
  margin-bottom: 10px;
  padding-top: 14px;
}

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

.faq-answer a {
  font-size: 14px;
  font-weight: 500;
  color: #2f6f5e;
}

.faq-answer a:hover {
  color: #d9553c;
}

/* 引导图片 */
.faq-guide-image {
  margin-bottom: 48px;
  border-radius: 8px;
  overflow: hidden;
}

.faq-guide-image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.faq-guide-image figcaption {
  font-size: 13px;
  color: #8a8f98;
  padding: 10px 4px 0;
  text-align: center;
}

/* 仍不确定 */
.still-unsure {
  margin-bottom: 48px;
}

.still-unsure > h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.still-unsure > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 20px;
}

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

.suggestion-card {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.suggestion-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(36, 38, 43, 0.05);
}

.suggestion-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.suggestion-card p {
  font-size: 14px;
  color: #6b6f78;
  margin-bottom: 12px;
  line-height: 1.7;
}

.suggestion-card a {
  font-size: 14px;
  font-weight: 500;
  color: #2f6f5e;
}

.suggestion-card a:hover {
  color: #d9553c;
}

/* FAQ 页底部链接 */
.still-unsure + .related-links {
  border-top: 1px solid #e8e2d8;
  padding: 32px 0;
  margin-bottom: 48px;
}

.still-unsure + .related-links h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.still-unsure + .related-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.still-unsure + .related-links a {
  font-size: 15px;
  color: #2f6f5e;
  padding: 6px 0;
  display: block;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.still-unsure + .related-links a:hover {
  color: #d9553c;
  padding-left: 6px;
}

/* --------------------------------------------------------------------------
   合作说明页
   -------------------------------------------------------------------------- */
.container {
  max-width: 820px;
  margin: 0 auto;
}

.intro-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 48px;
}

.intro-media {
  border-radius: 8px;
  overflow: hidden;
}

.intro-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.intro-media figcaption {
  font-size: 13px;
  color: #8a8f98;
  padding: 10px 4px 0;
  text-align: center;
}

.intro-block > p {
  font-size: 15px;
  color: #4a4d55;
  line-height: 1.8;
  margin-bottom: 0;
}

/* 准备清单 */
.prep-section {
  margin-bottom: 48px;
}

.prep-section > h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.prep-section > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 20px;
}

.prep-list {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 24px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
}

.prep-list li {
  font-size: 14px;
  color: #4a4d55;
  padding-left: 28px;
  position: relative;
  line-height: 1.7;
}

.prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.25em;
  width: 18px;
  height: 18px;
  border: 2px solid #2f6f5e;
  border-radius: 4px;
}

/* 方式选择 */
.approach-section {
  margin-bottom: 48px;
}

.approach-section > h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.approach-section > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 20px;
}

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

.approach-card {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.approach-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(36, 38, 43, 0.05);
}

.approach-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.approach-card p {
  font-size: 14px;
  color: #6b6f78;
  line-height: 1.7;
  margin-bottom: 12px;
}

.approach-card a {
  font-size: 14px;
  font-weight: 500;
  color: #2f6f5e;
  display: block;
  margin-bottom: 6px;
}

.approach-card a:hover {
  color: #d9553c;
}

/* 摘要模板 */
.summary-section {
  margin-bottom: 48px;
}

.summary-section > h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.summary-section > p {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 20px;
}

.template-block {
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 12px;
}

.template-block h3 {
  font-size: 15px;
  color: #2f6f5e;
  margin-bottom: 6px;
}

.template-block p {
  font-size: 14px;
  color: #4a4d55;
  margin-bottom: 0;
  line-height: 1.7;
}

/* 边界说明 */
.boundary-note {
  background-color: #fdf6ee;
  border: 1px solid #f0dfc8;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 48px;
}

.boundary-note h2 {
  font-size: 18px;
  margin-bottom: 14px;
  color: #a06a2a;
}

.boundary-note ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundary-note li {
  font-size: 14px;
  color: #6b5d4a;
  padding-left: 20px;
  position: relative;
  line-height: 1.7;
}

.boundary-note li::before {
  content: "·";
  position: absolute;
  left: 4px;
  top: 0;
  font-size: 18px;
  color: #a06a2a;
}

/* 合作说明底部链接 */
.boundary-note + .related-links {
  border-top: 1px solid #e8e2d8;
  padding: 32px 0;
  margin-bottom: 48px;
}

.boundary-note + .related-links h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.boundary-note + .related-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundary-note + .related-links a {
  font-size: 15px;
  color: #2f6f5e;
  padding: 6px 0;
  display: block;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.boundary-note + .related-links a:hover {
  color: #d9553c;
  padding-left: 6px;
}

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

.error-panel {
  max-width: 560px;
  text-align: center;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 8px;
  padding: 48px 40px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: #d9553c;
  line-height: 1;
  margin-bottom: 16px;
  font-family: "SF Mono", "Consolas", "Menlo", monospace;
}

.error-panel h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: #4a4d55;
  margin-bottom: 12px;
}

.error-help {
  font-size: 14px;
  color: #8a8f98;
  margin-bottom: 24px;
}

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

.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: #d9553c;
  color: #ffffff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.btn-primary:hover {
  background-color: #c74a33;
  color: #ffffff;
}

.error-actions a:not(.btn-primary) {
  display: inline-block;
  padding: 12px 24px;
  background-color: #ffffff;
  border: 1px solid #e8e2d8;
  border-radius: 6px;
  font-size: 15px;
  color: #4a4d55;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.error-actions a:not(.btn-primary):hover {
  border-color: #d9553c;
  color: #d9553c;
}

/* --------------------------------------------------------------------------
   响应式断点
   -------------------------------------------------------------------------- */
/* 1024px */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

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

  .hero-section {
    gap: 32px;
    padding: 48px 0 40px;
  }

  .hero-content h1 {
    font-size: 34px;
  }

  .fact-bar {
    gap: 16px;
    padding: 24px 20px;
  }

  .matrix-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .next-cards {
    grid-template-columns: 1fr 1fr;
  }

  .footer-cols {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* 768px */
@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid #e8e2d8;
    box-shadow: 0 8px 16px rgba(36, 38, 43, 0.08);
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0;
  }

  .site-nav li {
    border-bottom: 1px solid #f5f1e9;
  }

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

  .site-nav a {
    display: block;
    padding: 14px 24px;
    font-size: 16px;
    border-radius: 0;
  }

  .site-nav a.is-current {
    background-color: #fdf3ee;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 0 32px;
  }

  .hero-content h1 {
    font-size: 30px;
  }

  .hero-figure img {
    height: 260px;
  }

  .fact-bar {
    grid-template-columns: 1fr 1fr;
    margin-bottom: 48px;
  }

  .scenario-item {
    grid-template-columns: 1fr;
  }

  .scenario-item img {
    width: 100%;
    height: 180px;
  }

  .delivery-columns {
    grid-template-columns: 1fr;
  }

  .next-cards {
    grid-template-columns: 1fr;
  }

  .suggestion-grid {
    grid-template-columns: 1fr;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .scene-intro {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .delivery-intro {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .intro-block {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .approach-cards {
    grid-template-columns: 1fr;
  }

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

  .stage-item {
    grid-template-columns: 56px 1fr;
    padding: 20px;
  }

  .scene-item {
    grid-template-columns: 56px 1fr;
    padding: 20px;
  }
}

/* 520px */
@media (max-width: 520px) {
  .header-inner {
    padding: 0 16px;
  }

  .brand {
    font-size: 18px;
  }

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

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

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

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

  .hero-directory {
    grid-template-columns: 1fr;
  }

  .hero-figure img {
    height: 200px;
  }

  .fact-bar {
    grid-template-columns: 1fr;
    padding: 20px 16px;
  }

  .matrix-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 16px 24px;
  }

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

  .page-heading p {
    font-size: 15px;
  }

  .page-toc {
    padding: 14px 16px;
  }

  .page-toc ul {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }

  .page-toc li {
    flex-shrink: 0;
  }

  .stage-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .stage-number {
    width: 44px;
    height: 44px;
    font-size: 18px;
  }

  .scene-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .scene-number {
    width: 44px;
    height: 44px;
    font-size: 18px;
  }

  .deliverable-grid {
    grid-template-columns: 1fr;
  }

  .checklist li {
    font-size: 14px;
  }

  .prep-list {
    padding: 20px;
  }

  .prep-list li {
    font-size: 14px;
  }

  .acceptance-list {
    padding: 20px;
  }

  .acceptance-list li {
    padding-left: 32px;
  }

  .error-panel {
    padding: 32px 24px;
  }

  .error-code {
    font-size: 48px;
  }
}