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

*,
*::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: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #2c3e50;
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: #1f3a5f;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #e76f51;
}

ul,
ol {
  list-style: none;
}

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

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

input,
select {
  font-family: inherit;
  font-size: inherit;
}

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

/* ==========================================================================
   layout — 全站骨架
   ========================================================================== */

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

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

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e8edf2;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #1f3a5f;
  letter-spacing: 0;
}

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

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: #2c3e50;
  border-radius: 6px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-list li a:hover {
  color: #1f3a5f;
  background-color: #f5f7fa;
}

.nav-list li a.is-current {
  color: #1f3a5f;
  font-weight: 700;
  background-color: #f0f4f8;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: background-color 0.2s ease;
}

.nav-toggle:hover {
  background-color: #f5f7fa;
}

.nav-toggle-icon {
  position: relative;
  width: 20px;
  height: 2px;
  background-color: #1f3a5f;
  border-radius: 2px;
  transition: background-color 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background-color: #1f3a5f;
  border-radius: 2px;
  transition: transform 0.2s ease;
}

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

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

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-footer {
  background-color: #1f3a5f;
  color: #c8d4e3;
  margin-top: 0;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-col .footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #a9bcd0;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: #a9bcd0;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #8aa0b8;
}

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

.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: #7a8ba0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: #1f3a5f;
}

.breadcrumb a:hover {
  color: #e76f51;
}

.breadcrumb-sep {
  color: #b0bcc9;
  margin: 0 2px;
}

.breadcrumb-current {
  color: #7a8ba0;
}

.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  line-height: 1.7;
  color: #5a6b7d;
  max-width: 820px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.4;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.section-intro,
.section-desc {
  font-size: 16px;
  line-height: 1.7;
  color: #5a6b7d;
  margin-bottom: 24px;
  max-width: 820px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  background-color: #e76f51;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 6px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover {
  background-color: #d6603f;
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  background-color: #ffffff;
  color: #1f3a5f;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid #d4dce4;
  border-radius: 6px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.btn-secondary:hover {
  background-color: #f5f7fa;
  border-color: #1f3a5f;
  color: #1f3a5f;
}

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

.content-media img {
  width: 100%;
  border-radius: 8px;
}

.content-media figcaption {
  font-size: 14px;
  color: #7a8ba0;
  margin-top: 8px;
  line-height: 1.6;
}

.content-media-inline {
  max-width: 720px;
}

.related-links {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: #1f3a5f;
}

.related-links-item {
  font-size: 14px;
  color: #1f3a5f;
  padding: 6px 12px;
  background-color: #f5f7fa;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  background-color: #e8edf2;
  color: #e76f51;
}

/* FAQ 折叠项 */
.faq-item {
  border: 1px solid #e8edf2;
  border-radius: 8px;
  background-color: #ffffff;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: #1f3a5f;
  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:hover {
  background-color: #f5f7fa;
}

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: #e76f51;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-answer {
  padding: 0 20px 16px;
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
}

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

.faq-answer ol {
  padding-left: 20px;
  list-style: decimal;
  margin-bottom: 10px;
}

.faq-answer ol li {
  margin-bottom: 4px;
}

.faq-answer strong {
  color: #1f3a5f;
  font-weight: 600;
}

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

.home-main {
  width: 100%;
}

.hero-block {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 40px;
}

.hero-content {
  max-width: 720px;
}

.hero-content h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.35;
  color: #1f3a5f;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.7;
  color: #5a6b7d;
  margin-bottom: 24px;
  max-width: 640px;
}

.hero-cta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.hero-figure {
  margin-bottom: 40px;
}

.hero-figure img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid #e8edf2;
}

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

.entry-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  background-color: #f5f7fa;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  min-height: 96px;
}

.entry-card:hover {
  background-color: #ffffff;
  border-color: #1f3a5f;
  transform: translateY(-2px);
}

.entry-title {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 6px;
}

.entry-desc {
  font-size: 14px;
  line-height: 1.6;
  color: #5a6b7d;
}

.core-function-section {
  background-color: #f5f7fa;
  padding: 48px 0;
}

.core-function-section .section-intro {
  padding: 0 24px;
}

.core-function-section h2,
.core-function-section .section-intro {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.function-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.function-item {
  background-color: #ffffff;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.function-item:hover {
  border-color: #1f3a5f;
  box-shadow: 0 4px 12px rgba(31, 58, 95, 0.08);
}

.function-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.function-item p {
  font-size: 15px;
  line-height: 1.7;
  color: #5a6b7d;
}

.scene-entry-section {
  padding: 48px 0;
}

.scene-entry-section h2,
.scene-entry-section .section-intro {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.scene-cards {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.scene-card {
  background-color: #ffffff;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.scene-card:hover {
  border-color: #1f3a5f;
  box-shadow: 0 4px 12px rgba(31, 58, 95, 0.08);
}

.scene-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.scene-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1f3a5f;
  padding: 16px 20px 4px;
}

.scene-card p {
  font-size: 15px;
  line-height: 1.7;
  color: #5a6b7d;
  padding: 0 20px 12px;
}

.scene-card a {
  display: inline-block;
  margin: 0 20px 16px;
  font-size: 14px;
  font-weight: 600;
  color: #1f3a5f;
}

.scene-card a:hover {
  color: #e76f51;
}

.updates-preview-section {
  background-color: #f5f7fa;
  padding: 48px 0;
}

.updates-preview-section h2,
.updates-preview-section .section-intro {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

.timeline-preview li {
  position: relative;
  padding: 0 0 20px 28px;
  border-left: 2px solid #d4dce4;
}

.timeline-preview li:last-child {
  padding-bottom: 0;
}

.timeline-preview li::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #e76f51;
  border: 2px solid #ffffff;
}

.timeline-preview time {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #e76f51;
  margin-bottom: 4px;
}

.timeline-preview p {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
}

.more-link {
  display: inline-block;
  margin: 24px 24px 0;
  font-size: 15px;
  font-weight: 600;
  color: #1f3a5f;
}

.more-link:hover {
  color: #e76f51;
}

.faq-preview-section {
  padding: 48px 0;
}

.faq-preview-section > h2 {
  max-width: 1200px;
  margin: 0 auto 24px;
  padding: 0 24px;
}

.faq-preview-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

.topic-dir {
  background-color: #f5f7fa;
  border-radius: 8px;
  padding: 20px;
}

.topic-dir h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.topic-dir ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-dir ul li a {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  color: #3d4f61;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.topic-dir ul li a:hover {
  background-color: #e8edf2;
  color: #1f3a5f;
}

.cta-banner {
  max-width: 1200px;
  margin: 0 auto 48px;
  padding: 40px 48px;
  background-color: #1f3a5f;
  border-radius: 8px;
  text-align: center;
}

.cta-banner h2 {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.cta-banner p {
  font-size: 16px;
  color: #a9bcd0;
  margin-bottom: 20px;
}

/* ==========================================================================
   pages — 内页通用
   ========================================================================== */

.inner-main {
  width: 100%;
  padding-bottom: 48px;
}

/* 侧栏布局 */
.page-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

.sidebar-left .page-layout {
  grid-template-columns: 240px 1fr;
}

.page-sidebar {
  background-color: #f5f7fa;
  border-radius: 8px;
  padding: 20px;
  position: sticky;
  top: 80px;
}

.sub-nav-title {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.sub-nav ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sub-nav ul li a {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  color: #3d4f61;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.sub-nav ul li a:hover {
  background-color: #e8edf2;
  color: #1f3a5f;
}

.page-content {
  min-width: 0;
}

.content-section {
  margin-bottom: 40px;
  padding-top: 8px;
}

.content-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.content-section p {
  font-size: 16px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 12px;
}

.content-section p strong {
  color: #1f3a5f;
  font-weight: 600;
}

.overview-list {
  margin: 16px 0 20px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 24px;
}

.overview-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
}

.overview-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #e76f51;
}

.overview-list li strong {
  color: #1f3a5f;
  font-weight: 600;
}

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

.content-figure img {
  width: 100%;
  border-radius: 8px;
}

.content-figure figcaption {
  font-size: 14px;
  color: #7a8ba0;
  margin-top: 8px;
  line-height: 1.6;
}

/* 规模估算器 */
.scale-estimator {
  background-color: #f5f7fa;
  border-radius: 8px;
  padding: 24px;
  margin-top: 16px;
}

.scale-control {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.scale-control label {
  font-size: 15px;
  font-weight: 600;
  color: #1f3a5f;
}

.scale-control input[type="range"] {
  flex: 1;
  min-width: 200px;
  height: 4px;
  accent-color: #e76f51;
}

.scale-control input[type="number"] {
  width: 100px;
  min-height: 44px;
  padding: 6px 12px;
  border: 1px solid #d4dce4;
  border-radius: 6px;
  font-size: 16px;
  text-align: center;
  background-color: #ffffff;
}

.scale-unit {
  font-size: 14px;
  color: #7a8ba0;
}

.scale-suggestion {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #d4dce4;
}

.scale-suggestion-title {
  font-size: 15px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 6px;
}

.scale-suggestion p:last-child {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 0;
}

/* 功能组合 */
.combo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.combo-card {
  background-color: #f5f7fa;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.combo-card:hover {
  border-color: #1f3a5f;
  box-shadow: 0 4px 12px rgba(31, 58, 95, 0.08);
}

.combo-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.combo-card p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.combo-note {
  margin-top: 16px;
  font-size: 14px;
  color: #7a8ba0;
}

.combo-note a {
  color: #1f3a5f;
  font-weight: 600;
}

/* ==========================================================================
   pages — 实施流程
   ========================================================================== */

.prep-checklist,
.step-list,
.risk-notice {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

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

.checklist-item {
  background-color: #f5f7fa;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s ease;
}

.checklist-item:hover {
  border-color: #1f3a5f;
}

.checklist-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.checklist-item p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 8px;
}

.checklist-meta {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #e76f51;
  background-color: #fdeeea;
  padding: 4px 10px;
  border-radius: 4px;
}

.step-list {
  padding-top: 40px;
}

.step-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid #e8edf2;
}

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

.step-number {
  width: 48px;
  height: 48px;
  background-color: #1f3a5f;
  color: #ffffff;
  font-size: 20px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 12px;
}

.step-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
}

.step-detail dt {
  font-size: 14px;
  font-weight: 600;
  color: #1f3a5f;
  margin-top: 8px;
}

.step-detail dd {
  font-size: 14px;
  line-height: 1.6;
  color: #3d4f61;
}

.risk-notice {
  padding-top: 40px;
}

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

.risk-card {
  background-color: #f5f7fa;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 20px;
}

.risk-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.risk-card p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.risk-card p strong {
  color: #1f3a5f;
  font-weight: 600;
}

/* ==========================================================================
   pages — 资料中心
   ========================================================================== */

.category-tabs,
.doc-list,
.acquire-guide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

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

.category-tab-item {
  background-color: #f5f7fa;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s ease;
}

.category-tab-item:hover {
  border-color: #1f3a5f;
}

.category-tab-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.category-tab-item p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
}

.doc-list {
  padding-top: 40px;
}

.doc-category-group {
  margin-bottom: 32px;
}

.doc-category-group h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #f0f4f8;
}

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

.doc-card {
  background-color: #ffffff;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.doc-card:hover {
  border-color: #1f3a5f;
  box-shadow: 0 4px 12px rgba(31, 58, 95, 0.08);
}

.doc-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.doc-card p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 8px;
}

.doc-role {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #e76f51;
  background-color: #fdeeea;
  padding: 4px 10px;
  border-radius: 4px;
}

.acquire-guide {
  padding-top: 40px;
}

.acquire-content {
  background-color: #f5f7fa;
  border-radius: 8px;
  padding: 24px;
}

.acquire-content p {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 12px;
}

.acquire-content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   pages — 作品案例
   ========================================================================== */

.case-grid,
.method-breakdown,
.works-relation,
.method-summary,
.people-link {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding-top: 24px;
}

.case-grid > .section-title,
.case-grid > .section-desc {
  grid-column: 1 / -1;
}

.case-card {
  background-color: #ffffff;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.case-card:hover {
  border-color: #1f3a5f;
  box-shadow: 0 4px 12px rgba(31, 58, 95, 0.08);
}

.case-media img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.case-body {
  padding: 20px;
}

.case-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #1f3a5f;
  background-color: #f0f4f8;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.case-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 10px;
}

.case-body p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.case-body p strong {
  color: #1f3a5f;
  font-weight: 600;
}

.case-meta,
.case-team {
  font-size: 13px;
  color: #7a8ba0;
}

.case-meta strong,
.case-team strong {
  color: #5a6b7d;
}

.method-breakdown {
  padding-top: 40px;
}

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

.breakdown-item {
  background-color: #f5f7fa;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 20px;
}

.breakdown-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.breakdown-item p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
}

.works-relation {
  padding-top: 40px;
}

.relation-table {
  border: 1px solid #e8edf2;
  border-radius: 8px;
  overflow: hidden;
}

.relation-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid #e8edf2;
  align-items: center;
}

.relation-row:last-child {
  border-bottom: none;
}

.relation-row.relation-head {
  background-color: #f5f7fa;
  font-weight: 700;
  color: #1f3a5f;
}

.rel-col {
  font-size: 14px;
  line-height: 1.6;
  color: #3d4f61;
}

.relation-note {
  margin-top: 12px;
  font-size: 14px;
  color: #7a8ba0;
}

.relation-note a {
  color: #1f3a5f;
  font-weight: 600;
}

.method-summary {
  padding-top: 40px;
}

.summary-content {
  background-color: #f5f7fa;
  border-radius: 8px;
  padding: 24px;
}

.summary-content p {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 12px;
}

.summary-content ul {
  margin-bottom: 12px;
  padding-left: 0;
}

.summary-content ul li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.summary-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #e76f51;
}

.summary-content ul li strong {
  color: #1f3a5f;
  font-weight: 600;
}

.summary-content a {
  color: #1f3a5f;
  font-weight: 600;
  margin-right: 16px;
}

.people-link {
  padding-top: 40px;
}

.people-link p {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
}

.people-link a {
  color: #1f3a5f;
  font-weight: 600;
}

/* ==========================================================================
   pages — 人物介绍
   ========================================================================== */

.layout-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

.layout-shell.sidebar-left {
  grid-template-columns: 240px 1fr;
}

.role-aside {
  background-color: #f5f7fa;
  border-radius: 8px;
  padding: 20px;
  position: sticky;
  top: 80px;
}

.aside-title {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.role-quick-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.role-quick-list li a {
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  color: #3d4f61;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.role-quick-list li a:hover {
  background-color: #e8edf2;
  color: #1f3a5f;
}

.aside-note {
  font-size: 13px;
  line-height: 1.6;
  color: #7a8ba0;
}

.role-detail-wrap {
  min-width: 0;
}

.role-card-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.role-card {
  background-color: #ffffff;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.role-card:hover {
  border-color: #1f3a5f;
  box-shadow: 0 4px 12px rgba(31, 58, 95, 0.08);
}

.role-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.role-name {
  font-size: 20px;
  font-weight: 700;
  color: #1f3a5f;
}

.role-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #e76f51;
  background-color: #fdeeea;
  padding: 4px 10px;
  border-radius: 4px;
}

.role-desc {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 12px;
}

.role-permission {
  margin-bottom: 12px;
  padding-left: 0;
}

.role-permission li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 4px;
}

.role-permission li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #e76f51;
}

.role-scene,
.role-config {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.role-scene strong,
.role-config strong {
  color: #1f3a5f;
  font-weight: 600;
}

.role-compare-table {
  margin-bottom: 32px;
  overflow-x: auto;
}

.role-compare-table table {
  min-width: 600px;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  overflow: hidden;
}

.role-compare-table th,
.role-compare-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  line-height: 1.6;
  border-bottom: 1px solid #e8edf2;
}

.role-compare-table th {
  background-color: #f5f7fa;
  font-weight: 700;
  color: #1f3a5f;
}

.role-compare-table td {
  color: #3d4f61;
}

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

.sync-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
  margin-top: 16px;
}

.sync-figure img {
  width: 100%;
  border-radius: 8px;
}

.sync-figure figcaption {
  font-size: 14px;
  color: #7a8ba0;
  margin-top: 8px;
  line-height: 1.6;
}

.sync-subtitle {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.sync-fields ul {
  margin-bottom: 12px;
}

.sync-fields ul li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 4px;
}

.sync-fields ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #e76f51;
}

.sync-fields p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
}

.role-related {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid #e8edf2;
}

.role-related p {
  font-size: 14px;
  color: #7a8ba0;
}

.role-related a {
  color: #1f3a5f;
  font-weight: 600;
  margin-right: 16px;
}

/* ==========================================================================
   pages — FAQ
   ========================================================================== */

.faq-list {
  margin-top: 8px;
}

.faq-list .section-title {
  font-size: 20px;
  margin-top: 24px;
  margin-bottom: 12px;
}

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

.faq-question {
  font-size: 16px;
  font-weight: 600;
  color: #1f3a5f;
}

.faq-phenomenon,
.faq-cause,
.faq-solution,
.faq-escalation {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
}

.faq-phenomenon strong,
.faq-cause strong,
.faq-solution strong,
.faq-escalation strong {
  color: #1f3a5f;
  font-weight: 600;
}

.topic-dir-title {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.topic-dir-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-dir-list li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  font-size: 15px;
  color: #3d4f61;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.topic-dir-list li a:hover {
  background-color: #e8edf2;
  color: #1f3a5f;
}

.topic-count {
  font-size: 13px;
  color: #7a8ba0;
  background-color: #e8edf2;
  padding: 2px 8px;
  border-radius: 10px;
}

.support-path {
  margin-top: 40px;
}

.support-path-content {
  background-color: #f5f7fa;
  border-radius: 8px;
  padding: 24px;
}

.support-path-content p {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 12px;
}

.support-path-content ul {
  padding-left: 0;
}

.support-path-content ul li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.support-path-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #e76f51;
}

/* ==========================================================================
   pages — 更新动态
   ========================================================================== */

.timeline-section,
.roadmap-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

.timeline-year-group {
  margin-bottom: 32px;
}

.year-title {
  font-size: 20px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid #f0f4f8;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 0 0 24px 28px;
  border-left: 2px solid #d4dce4;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #e76f51;
  border: 2px solid #ffffff;
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.version-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: #1f3a5f;
  background-color: #f0f4f8;
  padding: 4px 10px;
  border-radius: 4px;
  width: fit-content;
}

.timeline-meta time {
  font-size: 14px;
  color: #7a8ba0;
}

.timeline-content h4 {
  font-size: 17px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 15px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.timeline-content p strong {
  color: #1f3a5f;
  font-weight: 600;
}

.timeline-figure {
  max-width: 1200px;
  margin: 24px auto 0;
  padding: 0 24px;
}

.timeline-figure img {
  width: 100%;
  border-radius: 8px;
}

.timeline-figure figcaption {
  font-size: 14px;
  color: #7a8ba0;
  margin-top: 8px;
  line-height: 1.6;
}

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

.roadmap-card {
  background-color: #f5f7fa;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s ease;
}

.roadmap-card:hover {
  border-color: #1f3a5f;
}

.roadmap-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 8px;
}

.roadmap-card p {
  font-size: 14px;
  line-height: 1.7;
  color: #3d4f61;
  margin-bottom: 6px;
}

.roadmap-card p strong {
  color: #1f3a5f;
  font-weight: 600;
}

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

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

.error-panel {
  text-align: center;
  max-width: 520px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #1f3a5f;
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  color: #1f3a5f;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  line-height: 1.7;
  color: #5a6b7d;
  margin-bottom: 24px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  background-color: #1f3a5f;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 6px;
  transition: background-color 0.2s ease;
}

.error-btn:hover {
  background-color: #2c4a70;
  color: #ffffff;
}

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

@media (max-width: 1024px) {
  .function-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

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

  .footer-columns {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 56px;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid #e8edf2;
    padding: 8px 16px 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    display: none;
    box-shadow: 0 8px 16px rgba(31, 58, 95, 0.08);
  }

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

  .nav-list li a {
    padding: 12px 16px;
    font-size: 16px;
  }

  .hero-block {
    padding: 32px 16px 32px;
  }

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

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

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

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

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

  .topic-dir {
    order: 2;
  }

  .page-layout {
    grid-template-columns: 1fr;
    padding: 0 16px;
  }

  .page-sidebar {
    position: static;
    order: 2;
    margin-top: 24px;
  }

  .layout-shell {
    grid-template-columns: 1fr;
    padding: 0 16px;
  }

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

  .role-aside {
    position: static;
    order: 2;
    margin-top: 24px;
  }

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

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

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

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

  .footer-bottom {
    padding: 12px 16px;
  }

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

  .relation-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .relation-row.relation-head {
    display: none;
  }

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

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

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

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

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

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

  .step-item {
    grid-template-columns: 44px 1fr;
    gap: 16px;
  }

  .step-number {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .step-detail {
    grid-template-columns: 1fr;
    gap: 4px 0;
  }

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

  .sync-intro {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-left: 20px;
  }

  .timeline-meta {
    flex-direction: row;
    align-items: center;
    gap: 8px;
  }

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

  .cta-banner {
    padding: 32px 24px;
    margin: 0 16px 32px;
  }

  .related-links {
    padding: 16px;
  }

  .scale-control {
    flex-direction: column;
    align-items: stretch;
  }

  .scale-control input[type="range"] {
    width: 100%;
    min-width: 0;
  }

  .scale-control input[type="number"] {
    width: 100%;
  }
}

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

  .hero-lead {
    font-size: 16px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .function-item {
    padding: 20px;
  }

  .scene-card img {
    height: 140px;
  }

  .timeline-preview li {
    padding-left: 24px;
  }

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

  .error-panel h1 {
    font-size: 22px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .hero-block {
    padding: 40px 24px 32px;
  }
}