/* ============================================================
   base — 全局基础样式
   ============================================================ */

*, *::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: "Songti SC", "SimSun", "STSong", Georgia, serif;
  font-size: 16px;
  line-height: 1.7;
  color: #111111;
  background-color: #f5f3ef;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: #111111;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #8a1f1f;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

strong {
  font-weight: 700;
}

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

/* ============================================================
   layout — 整站布局骨架
   ============================================================ */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

.site-header {
  background-color: #ffffff;
  border-bottom: 3px solid #111111;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #111111;
  border-bottom: 3px solid #8a1f1f;
  padding-bottom: 2px;
}

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li a {
  display: block;
  padding: 10px 14px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  font-weight: 500;
  color: #111111;
  border-bottom: 2px solid transparent;
}

.nav-list li a:hover {
  background-color: #f0ede8;
}

.nav-list li a.is-current {
  background-color: #111111;
  color: #ffffff;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid #111111;
  border-radius: 4px;
}

.nav-toggle-icon {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #111111;
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: #111111;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.header-cta {
  display: inline-block;
  padding: 9px 18px;
  background-color: #8a1f1f;
  color: #ffffff;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid #8a1f1f;
  border-radius: 4px;
  flex-shrink: 0;
  transition: background-color 0.2s ease;
}

.header-cta:hover {
  background-color: #6e1818;
  color: #ffffff;
}

.site-footer {
  background-color: #111111;
  color: #cccccc;
  margin-top: auto;
}

.footer-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr 1fr;
  gap: 40px;
}

.footer-col h2,
.footer-col h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.7;
  color: #aaaaaa;
}

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

.footer-col ul li a {
  color: #bbbbbb;
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid #333333;
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  max-width: 1200px;
  margin: 0 auto;
  font-size: 13px;
  color: #888888;
}

/* 内页通用骨架 */

.inner-main {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.breadcrumb {
  padding: 20px 0 12px;
  font-size: 14px;
  color: #666666;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a {
  color: #666666;
}

.breadcrumb a:hover {
  color: #8a1f1f;
}

.breadcrumb-sep {
  color: #999999;
}

.breadcrumb-current {
  color: #111111;
  font-weight: 600;
}

.page-header {
  border-bottom: 2px solid #111111;
  padding: 12px 0 24px;
  margin-bottom: 40px;
}

.page-title {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: #111111;
  line-height: 1.3;
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: #666666;
  max-width: 720px;
}

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

/* 按钮 */

.btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  font-weight: 600;
  border-radius: 4px;
  text-align: center;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: #8a1f1f;
  color: #ffffff;
  border: 1px solid #8a1f1f;
}

.btn-primary:hover {
  background-color: #6e1818;
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  color: #111111;
  border: 1px solid #111111;
}

.btn-secondary:hover {
  background-color: #111111;
  color: #ffffff;
}

.btn-outline {
  background-color: transparent;
  color: #111111;
  border: 1px solid #111111;
}

.btn-outline:hover {
  background-color: #111111;
  color: #ffffff;
}

/* 文字链接 */

.text-link {
  display: inline-block;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #8a1f1f;
  border-bottom: 1px solid #8a1f1f;
  padding-bottom: 2px;
}

.text-link:hover {
  color: #6e1818;
  border-color: #6e1818;
}

/* 区块标题 */

.section-heading {
  margin-bottom: 28px;
}

.section-heading h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 8px;
  position: relative;
  padding-left: 12px;
  border-left: 4px solid #8a1f1f;
}

.section-lead {
  font-size: 15px;
  color: #666666;
  max-width: 680px;
}

.section-title {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 8px;
  position: relative;
  padding-left: 12px;
  border-left: 4px solid #8a1f1f;
}

/* 内容图片 */

.content-media {
  margin: 24px 0;
}

.content-media img {
  width: 100%;
  height: auto;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
}

.content-media figcaption {
  font-size: 13px;
  color: #666666;
  padding: 8px 4px 0;
  line-height: 1.5;
}

.content-media-primary {
  margin: 0;
}

.content-media-primary img {
  border: 2px solid #111111;
  border-radius: 0;
}

.content-media-inline {
  margin: 32px 0;
}

/* FAQ 折叠 */

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

.faq-item {
  border: 1px solid #ddd9d3;
  background-color: #ffffff;
  border-radius: 4px;
}

.faq-item summary {
  padding: 16px 20px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: #111111;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: #8a1f1f;
  flex-shrink: 0;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid #eeeae5;
}

.faq-item .faq-answer,
.faq-item p {
  padding: 16px 20px;
  font-size: 15px;
  color: #333333;
  line-height: 1.8;
}

/* 表格通用 */

.table-container,
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.deliverable-table,
.method-table {
  width: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
  font-size: 15px;
}

.deliverable-table th,
.deliverable-table td,
.method-table th,
.method-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid #e5e1dc;
  vertical-align: top;
  line-height: 1.6;
}

.deliverable-table thead th,
.method-table thead th {
  background-color: #111111;
  color: #ffffff;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  border-bottom: none;
}

.deliverable-table tbody tr:nth-child(even),
.method-table tbody tr:nth-child(even) {
  background-color: #faf9f7;
}

.deliverable-table tbody tr:hover,
.method-table tbody tr:hover {
  background-color: #f0ede8;
}

/* 相关链接 */

.related-links {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid #ddd9d3;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.related-links-label {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #666666;
}

.related-links-item {
  display: inline-block;
  padding: 8px 16px;
  background-color: #ffffff;
  border: 1px solid #ddd9d3;
  border-radius: 4px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: #111111;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.related-links-item:hover {
  border-color: #8a1f1f;
  background-color: #faf7f5;
  color: #8a1f1f;
}

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

.home-main {
  width: 100%;
}

/* 刊头主区 */

.masthead-section {
  background-color: #ffffff;
  border-bottom: 3px solid #111111;
}

.masthead-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
}

.masthead-copy {
  padding-bottom: 8px;
}

.site-title {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 40px;
  font-weight: 900;
  line-height: 1.25;
  color: #111111;
  margin-bottom: 12px;
}

.slogan {
  font-size: 18px;
  font-weight: 700;
  color: #8a1f1f;
  margin-bottom: 12px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

.intro-text {
  font-size: 16px;
  color: #333333;
  max-width: 520px;
  margin-bottom: 28px;
}

.masthead-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.masthead-brief {
  border-left: 3px solid #111111;
  padding-left: 24px;
}

.brief-list {
  display: flex;
  flex-direction: column;
}

.brief-item {
  padding: 16px 0;
  border-bottom: 1px solid #e5e1dc;
}

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

.brief-title {
  display: block;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 4px;
}

.brief-desc {
  display: block;
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
}

/* 服务要目 */

.services-overview {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 48px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.service-card {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-top: 3px solid #111111;
  border-radius: 4px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  border-top-color: #8a1f1f;
  box-shadow: 0 2px 12px rgba(17, 17, 17, 0.06);
}

.service-card h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #eeeae5;
}

.card-goal {
  font-size: 14px;
  color: #333333;
  margin-bottom: 8px;
  line-height: 1.6;
}

.card-output {
  font-size: 14px;
  color: #666666;
  margin-bottom: 16px;
  line-height: 1.6;
}

.card-link {
  margin-top: auto;
  display: inline-block;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #8a1f1f;
}

.card-link:hover {
  color: #6e1818;
  text-decoration: underline;
}

/* 方法专版 */

.method-spread {
  background-color: #111111;
  color: #e0ddd8;
}

.spread-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.spread-col h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #8a1f1f;
}

.method-points li,
.boundary-points li {
  font-size: 15px;
  line-height: 1.7;
  color: #cccccc;
  padding: 8px 0 8px 20px;
  position: relative;
}

.method-points li::before,
.boundary-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 8px;
  background-color: #8a1f1f;
  border-radius: 1px;
}

.spread-col .text-link {
  margin-top: 16px;
  color: #e8c4c4;
  border-color: #8a1f1f;
}

.spread-col .text-link:hover {
  color: #ffffff;
}

.spread-footer-link {
  max-width: 1200px;
  margin: 0 auto;
  padding: 8px 24px 48px;
}

.spread-footer-link .btn-outline {
  color: #ffffff;
  border-color: #ffffff;
}

.spread-footer-link .btn-outline:hover {
  background-color: #ffffff;
  color: #111111;
}

/* 应用简报 */

.application-brief {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 48px;
}

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

.app-card {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease;
}

.app-card:hover {
  box-shadow: 0 4px 16px rgba(17, 17, 17, 0.08);
}

.app-media {
  border-bottom: 1px solid #e0ddd8;
}

.app-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.app-card h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #111111;
  padding: 20px 20px 8px;
}

.app-focus {
  font-size: 14px;
  color: #333333;
  padding: 0 20px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.app-fit {
  font-size: 14px;
  color: #666666;
  padding: 0 20px;
  line-height: 1.6;
  margin-bottom: 16px;
}

.app-card .card-link {
  margin: 0 20px 20px;
}

/* 问答专栏 */

.faq-preview {
  background-color: #ffffff;
  border-top: 1px solid #e0ddd8;
  border-bottom: 1px solid #e0ddd8;
}

.faq-preview > .section-heading {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 0;
}

.faq-preview .faq-list {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 8px;
}

.faq-preview > .text-link {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: block;
  width: fit-content;
}

/* 行动入口条 */

.cta-band {
  background-color: #8a1f1f;
  color: #ffffff;
}

.cta-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px;
  text-align: center;
}

.cta-content h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 26px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.cta-content p {
  font-size: 16px;
  color: #f0dada;
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

.cta-content .btn-primary {
  background-color: #ffffff;
  color: #8a1f1f;
  border-color: #ffffff;
}

.cta-content .btn-primary:hover {
  background-color: #f0ede8;
  color: #6e1818;
}

/* ============================================================
   pages — 服务说明页
   ============================================================ */

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

.service-groups > h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 4px solid #8a1f1f;
}

.service-group-block {
  margin-bottom: 40px;
}

.group-title {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #111111;
  padding: 12px 16px;
  background-color: #ffffff;
  border-left: 3px solid #111111;
  margin-bottom: 20px;
}

.service-item-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-item {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  padding: 24px;
}

.service-name {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #eeeae5;
}

.service-item p {
  font-size: 14px;
  color: #333333;
  line-height: 1.7;
  margin-bottom: 8px;
}

.service-item p strong {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  color: #666666;
  display: block;
  margin-bottom: 2px;
}

.deliverable-table-section {
  margin-bottom: 48px;
}

.deliverable-table-section > h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 4px solid #8a1f1f;
}

.service-media {
  margin-top: 24px;
}

.service-media img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
}

.service-media figcaption {
  font-size: 13px;
  color: #666666;
  padding: 8px 4px 0;
}

.related-entry {
  margin-top: 48px;
  padding: 24px;
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
}

.related-entry p {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.related-entry a {
  display: inline-block;
  padding: 8px 16px;
  background-color: #f5f3ef;
  border: 1px solid #ddd9d3;
  border-radius: 4px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: #111111;
}

.related-entry a:hover {
  border-color: #8a1f1f;
  color: #8a1f1f;
}

/* ============================================================
   pages — 工作方法页
   ============================================================ */

.method-steps {
  margin-bottom: 48px;
}

.method-steps > h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 4px solid #8a1f1f;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.step-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  padding: 24px;
}

.step-number {
  width: 48px;
  height: 48px;
  background-color: #111111;
  color: #ffffff;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.step-content h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 15px;
  color: #333333;
  line-height: 1.7;
  margin-bottom: 8px;
}

.step-content .step-output {
  font-size: 14px;
  color: #666666;
  background-color: #f5f3ef;
  padding: 8px 12px;
  border-left: 3px solid #8a1f1f;
}

.method-table-section {
  margin-bottom: 48px;
}

.method-table-section > h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 8px;
  padding-left: 12px;
  border-left: 4px solid #8a1f1f;
}

.method-table-section > p {
  font-size: 15px;
  color: #666666;
  margin-bottom: 20px;
}

.method-conclusion {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-left: 4px solid #8a1f1f;
  border-radius: 4px;
  padding: 32px;
  margin-bottom: 24px;
}

.method-conclusion h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 16px;
}

.method-conclusion p {
  font-size: 15px;
  color: #333333;
  line-height: 1.8;
  margin-bottom: 12px;
}

.method-conclusion p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   pages — 行业应用页
   ============================================================ */

.scenario-group {
  margin-bottom: 48px;
}

.scenario-item {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 32px;
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  padding: 28px;
  margin-bottom: 24px;
  align-items: start;
}

.scenario-item:last-child {
  margin-bottom: 0;
}

.scenario-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
}

.scenario-content h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #111111;
}

.scenario-content p {
  font-size: 15px;
  color: #333333;
  line-height: 1.7;
  margin-bottom: 12px;
}

.scenario-content ul li {
  font-size: 14px;
  color: #444444;
  line-height: 1.6;
  padding: 4px 0 4px 20px;
  position: relative;
}

.scenario-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  background-color: #8a1f1f;
}

.scenario-guide {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  padding: 32px;
  margin-bottom: 24px;
}

.scenario-guide h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 12px;
}

.scenario-guide p {
  font-size: 15px;
  color: #333333;
  line-height: 1.8;
}

/* ============================================================
   pages — 常见问题页
   ============================================================ */

.page-content {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

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

.faq-section .section-heading {
  margin-bottom: 20px;
}

.section-intro {
  font-size: 15px;
  color: #666666;
  max-width: 680px;
}

.faq-section .faq-list {
  margin-top: 20px;
}

.faq-more-entry {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  padding: 28px;
  margin-top: 8px;
}

.faq-more-entry p {
  font-size: 15px;
  color: #333333;
  margin-bottom: 16px;
}

.entry-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.entry-links a {
  display: inline-block;
  padding: 10px 20px;
  background-color: #f5f3ef;
  border: 1px solid #ddd9d3;
  border-radius: 4px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #111111;
}

.entry-links a:hover {
  border-color: #8a1f1f;
  color: #8a1f1f;
}

/* ============================================================
   pages — 合作流程页
   ============================================================ */

.process-steps-block {
  margin-bottom: 48px;
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 8px;
  padding-left: 12px;
  border-left: 4px solid #8a1f1f;
}

.section-head p {
  font-size: 15px;
  color: #666666;
  max-width: 680px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-card {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-top: 3px solid #111111;
  border-radius: 4px;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.process-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eeeae5;
}

.process-step-num {
  width: 36px;
  height: 36px;
  background-color: #8a1f1f;
  color: #ffffff;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
}

.process-card-head h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: #111111;
}

.process-activity {
  font-size: 14px;
  color: #333333;
  line-height: 1.7;
  margin-bottom: 16px;
}

.process-prepare {
  margin-top: auto;
  background-color: #f5f3ef;
  border-radius: 4px;
  padding: 14px;
}

.process-prepare h4 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 8px;
}

.process-prepare ul li {
  font-size: 13px;
  color: #555555;
  line-height: 1.6;
  padding: 2px 0 2px 14px;
  position: relative;
}

.process-prepare ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background-color: #8a1f1f;
}

.process-media-block {
  margin: 32px 0;
}

.process-media-block img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
}

.process-media-block figcaption {
  font-size: 13px;
  color: #666666;
  padding: 8px 4px 0;
}

.prep-list-block {
  margin-bottom: 48px;
}

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

.prep-list li {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-left: 3px solid #8a1f1f;
  border-radius: 4px;
  padding: 20px;
}

.prep-list h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #111111;
  margin-bottom: 6px;
}

.prep-list p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

.related-links-block {
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  padding: 28px;
}

.related-links-inner p {
  font-size: 15px;
  color: #333333;
  margin-bottom: 16px;
}

.related-links-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-group a {
  display: inline-block;
  padding: 10px 20px;
  background-color: #f5f3ef;
  border: 1px solid #ddd9d3;
  border-radius: 4px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #111111;
}

.related-links-group a:hover {
  border-color: #8a1f1f;
  color: #8a1f1f;
}

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  flex: 1 0 auto;
}

.error-panel {
  max-width: 560px;
  width: 100%;
  text-align: center;
  background-color: #ffffff;
  border: 1px solid #e0ddd8;
  border-radius: 4px;
  padding: 56px 40px;
}

.error-code {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 72px;
  font-weight: 900;
  color: #8a1f1f;
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 24px;
  font-weight: 800;
  color: #111111;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.error-link {
  display: inline-block;
  padding: 12px 24px;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid #111111;
  color: #111111;
  background-color: transparent;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.error-link:hover {
  background-color: #111111;
  color: #ffffff;
}

.error-link:first-child {
  background-color: #8a1f1f;
  border-color: #8a1f1f;
  color: #ffffff;
}

.error-link:first-child:hover {
  background-color: #6e1818;
}

/* ============================================================
   responsive — 响应式
   ============================================================ */

@media (max-width: 1024px) {

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

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

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

  .footer-layout {
    grid-template-columns: 1fr 1fr;
  }

  .masthead-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .masthead-brief {
    border-left: none;
    border-top: 3px solid #111111;
    padding-left: 0;
    padding-top: 20px;
  }

}

@media (max-width: 768px) {

  .header-inner {
    padding: 0 16px;
    min-height: 60px;
    flex-wrap: wrap;
  }

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

  .nav-toggle {
    display: flex;
    order: 3;
  }

  .header-cta {
    display: none;
  }

  .site-nav {
    order: 4;
    width: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    background-color: #ffffff;
    border-top: 1px solid #e0ddd8;
    padding: 8px 0;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list li a {
    display: block;
    padding: 14px 16px;
    border-bottom: 1px solid #f0ede8;
    border-radius: 0;
  }

  .nav-list li a.is-current {
    background-color: #111111;
    color: #ffffff;
  }

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

  .breadcrumb {
    padding: 16px 0 10px;
    font-size: 13px;
  }

  .page-header {
    padding: 10px 0 18px;
    margin-bottom: 32px;
  }

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

  .page-description {
    font-size: 15px;
  }

  .home-main {
    padding: 0;
  }

  .masthead-layout {
    padding: 40px 16px 32px;
  }

  .site-title {
    font-size: 30px;
  }

  .slogan {
    font-size: 16px;
  }

  .intro-text {
    font-size: 15px;
  }

  .services-overview,
  .application-brief {
    padding: 40px 16px;
  }

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

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

  .spread-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

  .spread-footer-link {
    padding: 8px 16px 40px;
  }

  .faq-preview > .section-heading {
    padding: 40px 16px 0;
  }

  .faq-preview .faq-list {
    padding: 20px 16px 8px;
  }

  .faq-preview > .text-link {
    padding: 0 16px 40px;
  }

  .cta-content {
    padding: 40px 16px;
  }

  .cta-content h2 {
    font-size: 22px;
  }

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

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

  /* 服务说明页 */

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

  .service-groups > h2,
  .deliverable-table-section > h2 {
    font-size: 20px;
  }

  /* 工作方法页 */

  .method-steps > h2,
  .method-table-section > h2 {
    font-size: 20px;
  }

  .step-item {
    grid-template-columns: 44px 1fr;
    gap: 14px;
    padding: 18px;
  }

  .step-number {
    width: 40px;
    height: 40px;
    font-size: 17px;
  }

  .method-conclusion {
    padding: 24px;
  }

  /* 行业应用页 */

  .scenario-item {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
  }

  .scenario-media img {
    height: 200px;
  }

  .scenario-guide {
    padding: 24px;
  }

  /* 合作流程页 */

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

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

  .related-links-block {
    padding: 24px;
  }

  /* 404 */

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

  .error-panel {
    padding: 40px 24px;
  }

  .error-code {
    font-size: 56px;
  }

}

@media (max-width: 480px) {

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

  .masthead-actions .btn {
    text-align: center;
  }

  .brief-item {
    padding: 14px 0;
  }

  .service-card {
    padding: 20px;
  }

  .app-media img {
    height: 180px;
  }

  .cta-content p {
    font-size: 15px;
  }

  .error-actions {
    flex-direction: column;
  }

  .error-actions .error-link {
    text-align: center;
  }

  .entry-links,
  .related-links-group,
  .related-entry p {
    flex-direction: column;
  }

  .entry-links a,
  .related-links-group a,
  .related-entry a {
    text-align: center;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
  }

  .deliverable-table,
  .method-table {
    min-width: 520px;
  }

}