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

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

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

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1A202C;
  background-color: #F7F9FC;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: #2B6CB0;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #1E4E8C;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: #1A202C;
}

p {
  margin: 0;
}

figure {
  margin: 0;
}

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

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

/* ==========================================================================
   layout
   ========================================================================== */

.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E2E8F0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: #2B6CB0;
  line-height: 1.2;
}

.brand-tagline {
  font-size: 12px;
  color: #718096;
  letter-spacing: 0;
  line-height: 1.4;
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav .nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: #4A5568;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav .nav-link:hover {
  color: #2B6CB0;
  background-color: #EBF0F7;
}

.site-nav .nav-link.is-current {
  color: #2B6CB0;
  background-color: #EBF0F7;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  background-color: #FFFFFF;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #2B6CB0;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.home-main {
  padding-top: 0;
}

.inner-main {
  padding-top: 32px;
  padding-bottom: 64px;
}

.site-footer {
  background-color: #FFFFFF;
  border-top: 1px solid #E2E8F0;
  margin-top: 32px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.footer-brand h3 {
  font-size: 20px;
  color: #2B6CB0;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  color: #718096;
  line-height: 1.7;
  max-width: 360px;
}

.footer-nav h3,
.footer-contact h3 {
  font-size: 16px;
  color: #1A202C;
  margin-bottom: 16px;
}

.footer-nav ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a,
.footer-contact a {
  font-size: 14px;
  color: #4A5568;
}

.footer-nav a:hover,
.footer-contact a:hover {
  color: #2B6CB0;
}

.footer-bottom {
  border-top: 1px solid #E2E8F0;
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #A0AEC0;
}

/* 面包屑 */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #718096;
  margin-bottom: 16px;
}

.breadcrumb a {
  color: #2B6CB0;
}

.breadcrumb a:hover {
  color: #1E4E8C;
}

.breadcrumb-sep {
  color: #CBD5E0;
}

.breadcrumb-current {
  color: #4A5568;
}

/* 页标题区 */

.page-header {
  margin-bottom: 24px;
}

.page-header .page-title {
  font-size: 32px;
  font-weight: 700;
  color: #1A202C;
  line-height: 1.3;
}

.page-title .page-desc {
  font-size: 16px;
  color: #4A5568;
  line-height: 1.7;
  margin-top: 12px;
  max-width: 760px;
}

/* 相关链接 */

.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: #1A202C;
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: #2B6CB0;
  padding: 6px 14px;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  background-color: #FFFFFF;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.related-links-item:hover {
  border-color: #2B6CB0;
  background-color: #EBF0F7;
  color: #2B6CB0;
}

/* ==========================================================================
   components
   ========================================================================== */

/* 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  line-height: 1.5;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background-color: #2B6CB0;
  color: #FFFFFF;
  border: 1px solid #2B6CB0;
}

.btn-primary:hover {
  background-color: #1E4E8C;
  border-color: #1E4E8C;
  color: #FFFFFF;
}

.btn-secondary {
  background-color: transparent;
  color: #2B6CB0;
  border: 1px solid #2B6CB0;
}

.btn-secondary:hover {
  background-color: #EBF0F7;
  color: #2B6CB0;
}

.btn-ghost {
  background-color: transparent;
  color: #2B6CB0;
  border: 1px solid #E2E8F0;
}

.btn-ghost:hover {
  border-color: #2B6CB0;
  background-color: #EBF0F7;
}

/* 区块标题 */

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

.section-kicker {
  font-size: 14px;
  font-weight: 600;
  color: #2B6CB0;
  margin-bottom: 8px;
}

.section-heading h2 {
  font-size: 28px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 12px;
}

.section-heading .section-desc {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  max-width: 720px;
}

/* FAQ */

.faq-item {
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  background-color: #FFFFFF;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: #1A202C;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: #2B6CB0;
  flex-shrink: 0;
  line-height: 1;
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  background-color: #F7F9FC;
}

.faq-item .answer {
  padding: 0 20px 16px;
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
}

.faq-item .answer p + p {
  margin-top: 8px;
}

/* ==========================================================================
   pages
   ========================================================================== */

/* ---------- 首页 ---------- */

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 64px 0 48px;
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.hero-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: #2B6CB0;
}

.hero-text h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: #1A202C;
}

.hero-desc {
  font-size: 16px;
  color: #4A5568;
  line-height: 1.7;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.hero-image figure {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.hero-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* 服务矩阵 */

.service-matrix {
  padding: 48px 0;
}

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

.service-card {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.service-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.service-card--wide {
  grid-column: span 2;
}

.service-icon {
  font-size: 28px;
  line-height: 1;
}

.service-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1A202C;
}

.service-card p {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
  flex-grow: 1;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  color: #2B6CB0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link:hover {
  color: #1E4E8C;
}

/* 流程预览 */

.process-preview {
  padding: 48px 0;
  background-color: #FFFFFF;
  border-top: 1px solid #E2E8F0;
  border-bottom: 1px solid #E2E8F0;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-steps .step {
  background-color: #F7F9FC;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step-num {
  font-size: 32px;
  font-weight: 700;
  color: #2B6CB0;
  line-height: 1;
}

.process-steps .step h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1A202C;
}

.process-steps .step p {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
}

.process-more {
  margin-top: 32px;
  text-align: center;
}

/* 内容参考引导 */

.reference-teaser {
  padding: 48px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.reference-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.reference-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: #1A202C;
}

.reference-text p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
}

.reference-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 8px 0;
}

.reference-points li {
  font-size: 14px;
  color: #4A5568;
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.reference-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: #2B6CB0;
}

.reference-image figure {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

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

/* FAQ 摘要 */

.faq-summary {
  padding: 48px 0;
}

.faq-summary .faq-list {
  margin-bottom: 24px;
}

.faq-more-link {
  text-align: center;
  margin-top: 24px;
}

/* 合作引导 */

.contact-guide {
  padding: 48px 0;
  background-color: #FFFFFF;
  border-top: 1px solid #E2E8F0;
  border-radius: 0;
}

.contact-guide-text {
  max-width: 720px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.contact-guide-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: #1A202C;
}

.contact-guide-text p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
}

/* ---------- 核心业务 ---------- */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 40px;
  align-items: start;
}

.main-column {
  min-width: 0;
}

.main-column .page-title {
  margin-bottom: 24px;
}

.business-overview {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 32px;
}

.business-overview figure {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.business-overview img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: 6px;
}

.business-overview figcaption {
  font-size: 14px;
  color: #718096;
  line-height: 1.6;
}

.business-list {
  margin-bottom: 40px;
}

.business-list .section-title {
  font-size: 28px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 24px;
}

.business-item {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
}

.business-icon {
  font-size: 28px;
  line-height: 1;
  grid-row: span 3;
}

.business-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1A202C;
  margin-bottom: 8px;
}

.business-item .business-scene,
.business-item .business-output {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
  margin-bottom: 6px;
}

.business-item strong {
  color: #1A202C;
  font-weight: 600;
  margin-right: 6px;
}

.business-detail {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
}

.business-detail > h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 12px;
}

.business-detail > p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 24px;
}

.detail-block {
  padding: 20px 0;
  border-top: 1px solid #E2E8F0;
}

.detail-block h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1A202C;
  margin-bottom: 10px;
}

.detail-block p {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 8px;
}

/* 侧栏 */

.sidebar {
  min-width: 0;
}

.sidebar-guide,
.sidebar-contact {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.sidebar h4 {
  font-size: 16px;
  font-weight: 600;
  color: #1A202C;
  margin-bottom: 14px;
}

.sidebar-guide ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-guide a {
  font-size: 14px;
  color: #4A5568;
  display: block;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.sidebar-guide a:hover {
  color: #2B6CB0;
}

.sidebar-contact p {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
  margin-bottom: 12px;
}

.sidebar-contact a {
  font-size: 14px;
  font-weight: 600;
  color: #2B6CB0;
}

/* ---------- 工作方式 ---------- */

.process-anchor {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 16px 20px;
}

.process-anchor a {
  font-size: 14px;
  font-weight: 600;
  color: #2B6CB0;
  padding: 6px 14px;
  border-radius: 6px;
  background-color: #F7F9FC;
  border: 1px solid #E2E8F0;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.process-anchor a:hover {
  background-color: #EBF0F7;
  border-color: #2B6CB0;
}

.step-detail {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.step-info {
  min-width: 0;
}

.step-info .step-num {
  font-size: 20px;
  font-weight: 700;
  color: #2B6CB0;
  margin-bottom: 8px;
  display: block;
}

.step-info h3 {
  font-size: 22px;
  font-weight: 600;
  color: #1A202C;
  margin-bottom: 12px;
}

.step-scope {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 16px;
}

.step-tasks {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step-tasks li {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.step-tasks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: #F6AD55;
}

.step-output {
  background-color: #F7F9FC;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-self: start;
}

.step-deliverable,
.step-check {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
}

.step-deliverable strong,
.step-check strong {
  color: #1A202C;
  font-weight: 600;
  margin-right: 6px;
}

.step-figure {
  grid-column: 1 / -1;
  margin-top: 8px;
}

.step-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 6px;
}

.step-figure figcaption {
  font-size: 13px;
  color: #718096;
  margin-top: 8px;
}

/* ---------- 内容参考 ---------- */

.method-framework {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 32px;
}

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

.framework-text h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 14px;
}

.framework-text p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.framework-text ul li {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.framework-text ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: #2B6CB0;
}

.framework-text ul li strong {
  color: #1A202C;
  font-weight: 600;
  margin-right: 4px;
}

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

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

.framework-image figcaption {
  font-size: 13px;
  color: #718096;
  margin-top: 8px;
}

.field-dictionary {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 32px;
}

.dictionary-table h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 12px;
}

.dictionary-table p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 20px;
}

.fields-table {
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  overflow: hidden;
}

.fields-table th {
  background-color: #F7F9FC;
  font-size: 14px;
  font-weight: 600;
  color: #1A202C;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid #E2E8F0;
  white-space: nowrap;
}

.fields-table td {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
  padding: 12px 16px;
  border-bottom: 1px solid #E2E8F0;
  vertical-align: top;
}

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

.fields-table tbody tr:hover td {
  background-color: #F7F9FC;
}

.dictionary-image {
  margin-top: 24px;
}

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

.dictionary-image img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.dictionary-image figcaption {
  font-size: 13px;
  color: #718096;
  margin-top: 8px;
}

.topic-examples {
  margin-bottom: 32px;
}

.topic-examples > h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 12px;
}

.topic-examples > p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.topic-card {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.topic-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.topic-name {
  font-size: 18px;
  font-weight: 600;
  color: #1A202C;
}

.topic-approach {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
}

.topic-boundary {
  font-size: 13px;
  color: #718096;
  line-height: 1.6;
  padding-top: 12px;
  border-top: 1px solid #E2E8F0;
}

.reference-note {
  background-color: #EBF0F7;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 32px;
}

.reference-note p {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.7;
}

.reference-note a {
  color: #2B6CB0;
  font-weight: 500;
}

/* ---------- FAQ 页 ---------- */

.faq-guide {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-guide p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  max-width: 720px;
}

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

.faq-guide-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.faq-guide-figure figcaption {
  font-size: 13px;
  color: #718096;
  margin-top: 8px;
}

.faq-list h2 {
  font-size: 22px;
  font-weight: 700;
  color: #1A202C;
  margin: 32px 0 16px;
}

.faq-list h2:first-child {
  margin-top: 0;
}

.faq-more {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-more p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
}

.faq-more-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.faq-more-links a {
  font-size: 14px;
  font-weight: 600;
  color: #2B6CB0;
  padding: 8px 16px;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  background-color: #F7F9FC;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.faq-more-links a:hover {
  background-color: #EBF0F7;
  border-color: #2B6CB0;
}

/* ---------- 合作联系 ---------- */

.contact-steps {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 32px;
}

.contact-steps > h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 8px;
}

.contact-steps .section-desc {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 24px;
}

.step-card {
  background-color: #F7F9FC;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step-card .step-num {
  font-size: 28px;
  font-weight: 700;
  color: #2B6CB0;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1A202C;
}

.step-card p {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.7;
}

.step-card p a {
  color: #2B6CB0;
  font-weight: 500;
}

.step-figure {
  margin-top: 12px;
}

.step-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 6px;
}

.step-figure figcaption {
  font-size: 13px;
  color: #718096;
  margin-top: 8px;
}

.preparation-list {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 32px;
}

.preparation-list > h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 8px;
}

.preparation-list .section-desc {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.pre-list li {
  background-color: #F7F9FC;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 20px;
}

.pre-list li strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: #1A202C;
  margin-bottom: 8px;
}

.pre-list li p {
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
}

.response-note {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 32px;
}

.response-note h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 12px;
}

.response-note p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
  margin-bottom: 12px;
}

.response-note p:last-child {
  margin-bottom: 0;
}

.faq-link {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 32px;
}

.faq-link h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1A202C;
  margin-bottom: 12px;
}

.faq-link p {
  font-size: 15px;
  color: #4A5568;
  line-height: 1.7;
}

.faq-link p a {
  color: #2B6CB0;
  font-weight: 600;
}

/* ---------- 404 ---------- */

.error-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
  min-height: 60vh;
}

.error-section {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #2B6CB0;
  line-height: 1;
}

.error-section h1 {
  font-size: 28px;
  font-weight: 700;
  color: #1A202C;
}

.error-desc {
  font-size: 16px;
  color: #4A5568;
  line-height: 1.7;
}

.error-hint {
  font-size: 14px;
  color: #718096;
  line-height: 1.6;
}

.error-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

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

@media (max-width: 992px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-card--wide {
    grid-column: span 2;
  }

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

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

  .sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .sidebar-guide,
  .sidebar-contact {
    margin-bottom: 0;
  }

  .step-detail {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .step-figure {
    grid-column: 1;
  }

  .method-framework {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .reference-teaser {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid #E2E8F0;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    display: flex;
  }

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

  .site-nav .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: 6px;
  }

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

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

  .inner-main {
    padding-top: 24px;
    padding-bottom: 48px;
  }

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

  .footer-brand p {
    max-width: 100%;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px 0 32px;
  }

  .hero-image img {
    height: 240px;
  }

  .hero-text h1 {
    font-size: 28px;
  }

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

  .section-heading h2 {
    font-size: 24px;
  }

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

  .service-card--wide {
    grid-column: span 1;
  }

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

  .reference-image img {
    height: 220px;
  }

  .contact-guide-text h2 {
    font-size: 24px;
  }

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

  .business-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .business-icon {
    font-size: 24px;
  }

  .step-detail {
    padding: 24px;
  }

  .step-info h3 {
    font-size: 20px;
  }

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

  .field-dictionary {
    padding: 24px;
  }

  .fields-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .fields-table thead,
  .fields-table tbody {
    min-width: 640px;
  }

  .topic-card {
    padding: 20px;
  }

  .faq-guide {
    padding: 20px;
  }

  .faq-guide-figure img {
    height: 180px;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 15px;
  }

  .faq-item .answer {
    padding: 0 16px 14px;
    font-size: 14px;
  }

  .contact-steps {
    padding: 24px;
  }

  .preparation-list {
    padding: 24px;
  }

  .response-note {
    padding: 24px;
  }

  .faq-link {
    padding: 24px;
  }

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

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

@media (max-width: 480px) {
  .brand-name {
    font-size: 20px;
  }

  .brand-tagline {
    display: none;
  }

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

  .process-anchor {
    flex-direction: column;
    align-items: stretch;
  }

  .process-anchor a {
    text-align: center;
  }

  .step-output {
    padding: 16px;
  }

  .method-framework {
    padding: 24px;
  }

  .framework-image img {
    height: 200px;
  }

  .dictionary-image img {
    height: 180px;
  }

  .faq-more-links {
    flex-direction: column;
  }

  .faq-more-links a {
    text-align: center;
  }
}