/* ==========================================================================
   bsmtyy120.com · 今日吃瓜 整站样式
   视觉方向：双色信息风 · 深蓝 #1B4E6B + 琥珀 #E8A33D
   结构：base → layout → components → pages → responsive
   ========================================================================== */

/* ==========================================================================
   Base
   ========================================================================== */
*,
*::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: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  color: #25333D;
  background-color: #FFFFFF;
}

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

a {
  color: #1B4E6B;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #E8A33D;
}

ul,
ol {
  list-style: none;
}

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

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

.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #D8E0E5;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.site-main {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.site-footer {
  background-color: #F5F7FA;
  border-top: 1px solid #D8E0E5;
  margin-top: 48px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 24px;
  border-top: 1px solid #D8E0E5;
}

/* ==========================================================================
   Components
   ========================================================================== */

/* ---------- 品牌 Logo ---------- */
.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 600;
  color: #1B4E6B;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-size: 12px;
  color: #6B7B85;
}

/* ---------- 主导航 ---------- */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 4px;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #1B4E6B;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.nav-item {
  margin: 0;
}

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 15px;
  color: #25333D;
  border-radius: 4px;
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: #1B4E6B;
  background-color: #F5F7FA;
}

.nav-link.is-current {
  color: #1B4E6B;
  font-weight: 600;
}

.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  background-color: #1B4E6B;
  border-radius: 1px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #6B7B85;
  margin-bottom: 16px;
}

.breadcrumb a {
  color: #1B4E6B;
}

.breadcrumb a:hover {
  color: #E8A33D;
}

.breadcrumb-sep {
  color: #9AA8B0;
}

.breadcrumb-current {
  color: #6B7B85;
}

/* ---------- 页面标题区 ---------- */
.page-header {
  margin-bottom: 24px;
}

.page-title {
  font-size: 36px;
  line-height: 1.3;
  font-weight: 600;
  color: #25333D;
}

/* ---------- 区块标题 ---------- */
.section-head {
  margin-bottom: 32px;
}

.section-title {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 16px;
  color: #6B7B85;
  max-width: 720px;
}

/* ---------- 按钮 ---------- */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: #1B4E6B;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  transition: background-color 0.2s ease;
}

.btn-primary:hover {
  background-color: #163E55;
  color: #FFFFFF;
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background-color: transparent;
  color: #1B4E6B;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid #1B4E6B;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.btn-secondary:hover {
  background-color: #F5F7FA;
  color: #1B4E6B;
}

/* ---------- 文字链接 ---------- */
.text-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: #1B4E6B;
  position: relative;
  padding-bottom: 2px;
}

.text-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background-color: #1B4E6B;
  transition: background-color 0.2s ease;
}

.text-link:hover {
  color: #E8A33D;
}

.text-link:hover::after {
  background-color: #E8A33D;
}

/* ---------- 标签 ---------- */
.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: #F5F7FA;
  color: #1B4E6B;
  font-size: 13px;
  border: 1px solid #D8E0E5;
  border-radius: 4px;
}

/* ---------- FAQ ---------- */
.faq-item {
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  margin-bottom: 12px;
  background-color: #FFFFFF;
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: #25333D;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  list-style: none;
  transition: background-color 0.2s ease;
}

.faq-question:hover {
  background-color: #F5F7FA;
}

.faq-question::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: #1B4E6B;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-answer {
  padding: 0 20px 16px;
  font-size: 15px;
  color: #4A5A63;
  border-top: 1px solid #F0F3F5;
}

.faq-answer p {
  padding-top: 12px;
}

/* ---------- 页脚 ---------- */
.footer-brand {
  flex: 1;
  min-width: 200px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 600;
  color: #1B4E6B;
  display: block;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: #6B7B85;
  max-width: 320px;
}

.footer-links {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.link-group {
  min-width: 120px;
}

.link-group-title {
  font-size: 15px;
  font-weight: 600;
  color: #25333D;
  margin-bottom: 12px;
}

.link-list li {
  margin-bottom: 8px;
}

.footer-link {
  font-size: 14px;
  color: #6B7B85;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #1B4E6B;
}

.copyright {
  font-size: 13px;
  color: #9AA8B0;
}

/* ---------- 相关链接条 ---------- */
.related-links {
  margin-top: 48px;
  padding: 20px 24px;
  background-color: #F5F7FA;
  border-radius: 6px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: #1B4E6B;
}

.related-links-item {
  font-size: 14px;
  color: #6B7B85;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  color: #1B4E6B;
  background-color: #FFFFFF;
}

/* ---------- 图片容器 ---------- */
figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  color: #9AA8B0;
  margin-top: 8px;
  text-align: center;
}

/* ==========================================================================
   Pages · 首页
   ========================================================================== */

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

.hero-left {
  min-width: 0;
}

.hero-title {
  font-size: 36px;
  line-height: 1.3;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 16px;
  color: #4A5A63;
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-right {
  min-width: 0;
}

.hero-figure {
  margin-bottom: 20px;
}

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

.hero-entries {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.entry-card:hover {
  border-color: #1B4E6B;
  box-shadow: 0 2px 8px rgba(27, 78, 107, 0.08);
}

.entry-label {
  font-size: 12px;
  color: #E8A33D;
  font-weight: 600;
}

.entry-text {
  font-size: 14px;
  color: #25333D;
  line-height: 1.4;
}

/* ---------- 服务索引 ---------- */
.service-index {
  padding: 56px 0;
  border-top: 1px solid #D8E0E5;
}

.index-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  overflow: hidden;
}

.index-row {
  display: grid;
  grid-template-columns: 56px 1fr 1.4fr;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid #F0F3F5;
  transition: background-color 0.2s ease;
}

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

.index-row:hover {
  background-color: #F5F7FA;
}

.index-no {
  font-size: 14px;
  font-weight: 600;
  color: #E8A33D;
}

.index-name {
  font-size: 16px;
  font-weight: 600;
  color: #1B4E6B;
}

.index-name:hover {
  color: #E8A33D;
}

.index-summary {
  font-size: 14px;
  color: #6B7B85;
}

/* ---------- 服务详情 ---------- */
.service-details {
  padding: 56px 0;
  border-top: 1px solid #D8E0E5;
}

.detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.detail-block:last-child {
  margin-bottom: 0;
}

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

.detail-title {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
  color: #25333D;
  margin-bottom: 12px;
}

.detail-para {
  font-size: 15px;
  color: #4A5A63;
  margin-bottom: 12px;
}

.detail-text .tag-group {
  margin-bottom: 16px;
}

.detail-figure {
  min-width: 0;
}

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

/* 交替布局 */
.detail-reverse .detail-text {
  order: 2;
}

.detail-reverse .detail-figure {
  order: 1;
}

/* ---------- 场景预览 ---------- */
.scenario-preview {
  padding: 56px 0;
  border-top: 1px solid #D8E0E5;
}

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

.scenario-card {
  padding: 24px;
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.scenario-card:hover {
  border-color: #1B4E6B;
}

.scenario-name {
  font-size: 18px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 8px;
}

.scenario-desc {
  font-size: 15px;
  color: #4A5A63;
  margin-bottom: 16px;
}

/* ---------- 合作流程 ---------- */
.process {
  padding: 56px 0;
  border-top: 1px solid #D8E0E5;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.process-step {
  position: relative;
  padding: 24px;
  background-color: #FFFFFF;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
}

.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: #1B4E6B;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  border-radius: 50%;
  margin-bottom: 12px;
}

.step-title {
  font-size: 16px;
  font-weight: 600;
  color: #25333D;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: #6B7B85;
  line-height: 1.5;
}

.process-link {
  text-align: center;
}

/* ---------- FAQ 预览 ---------- */
.faq-preview {
  padding: 56px 0;
  border-top: 1px solid #D8E0E5;
}

.faq-more {
  margin-top: 24px;
}

/* ==========================================================================
   Pages · 内页公共
   ========================================================================== */

/* ---------- 内页 page-head ---------- */
.page-head {
  margin-bottom: 40px;
}

.page-head-text {
  max-width: 720px;
}

.page-desc {
  font-size: 16px;
  color: #4A5A63;
  line-height: 1.7;
}

.page-head-figure {
  margin-top: 24px;
}

.page-head-image {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: 8px;
}

.figure-caption {
  font-size: 13px;
  color: #9AA8B0;
  margin-top: 8px;
  text-align: center;
}

.page-head-desc {
  font-size: 16px;
  color: #4A5A63;
  max-width: 720px;
  line-height: 1.7;
}

.page-head-inner {
  max-width: 720px;
}

.page-intro {
  font-size: 16px;
  color: #4A5A63;
  line-height: 1.7;
}

.page-lead {
  font-size: 17px;
  color: #4A5A63;
  line-height: 1.7;
  max-width: 720px;
  margin-bottom: 24px;
}

/* ==========================================================================
   Pages · 数据目录 (data)
   ========================================================================== */
.topic-list {
  margin-bottom: 48px;
}

.topic-group {
  margin-bottom: 32px;
  padding: 24px;
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
}

.group-title {
  font-size: 18px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #E8A33D;
  display: inline-block;
}

.topic-group .topic-card {
  background-color: #FFFFFF;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  padding: 16px 20px;
  margin-bottom: 12px;
  transition: border-color 0.2s ease;
}

.topic-group .topic-card:last-child {
  margin-bottom: 0;
}

.topic-group .topic-card:hover {
  border-color: #1B4E6B;
}

.topic-name {
  font-size: 16px;
  font-weight: 600;
  color: #25333D;
  margin-bottom: 6px;
}

.topic-desc {
  font-size: 14px;
  color: #6B7B85;
  margin-bottom: 8px;
}

.topic-link {
  font-size: 14px;
  font-weight: 600;
  color: #1B4E6B;
}

.topic-link:hover {
  color: #E8A33D;
}

/* ---------- 交付形式 ---------- */
.delivery-notes {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid #D8E0E5;
}

.delivery-notes .delivery-card {
  padding: 24px;
  background-color: #FFFFFF;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  margin-bottom: 16px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.delivery-notes .delivery-card:hover {
  border-color: #1B4E6B;
  background-color: #F5F7FA;
}

.delivery-title {
  font-size: 18px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 8px;
}

.delivery-desc {
  font-size: 15px;
  color: #4A5A63;
  margin-bottom: 12px;
}

.delivery-link {
  font-size: 14px;
  font-weight: 600;
  color: #E8A33D;
}

.delivery-link:hover {
  color: #1B4E6B;
}

/* ==========================================================================
   Pages · 字段说明 (fields)
   ========================================================================== */
.schema-overview {
  margin-bottom: 48px;
}

.schema-overview-inner {
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  align-items: center;
}

.schema-overview-text .section-title {
  margin-bottom: 12px;
}

.schema-figure {
  min-width: 0;
}

.schema-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: 6px;
}

.schema-caption {
  font-size: 13px;
  color: #9AA8B0;
  margin-top: 8px;
  text-align: center;
}

/* ---------- 字段表格 ---------- */
.field-table-section {
  margin-bottom: 48px;
}

.field-table-inner {
  background-color: #FFFFFF;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
}

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

.field-table thead {
  background-color: #1B4E6B;
  color: #FFFFFF;
}

.field-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.field-table td {
  padding: 12px 16px;
  border-top: 1px solid #F0F3F5;
  color: #4A5A63;
  vertical-align: top;
}

.field-table tbody tr:hover {
  background-color: #F5F7FA;
}

/* ---------- 字段关联 ---------- */
.relation-notes {
  margin-bottom: 48px;
}

.relation-notes-inner {
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  padding: 32px;
}

.relation-notes-inner .section-title {
  margin-bottom: 24px;
}

.relation-item {
  padding: 16px 0;
  border-bottom: 1px solid #D8E0E5;
}

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

.relation-title {
  font-size: 16px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 6px;
}

.relation-text {
  font-size: 15px;
  color: #4A5A63;
  line-height: 1.6;
}

/* ==========================================================================
   Pages · 使用示例 (examples)
   ========================================================================== */
.scenario-block {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid #D8E0E5;
}

.scenario-block:last-of-type {
  border-bottom: none;
}

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

.scenario-text h2 {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 12px;
}

.scenario-goal {
  font-size: 15px;
  color: #E8A33D;
  font-weight: 600;
  margin-bottom: 12px;
}

.scenario-text p {
  font-size: 15px;
  color: #4A5A63;
  margin-bottom: 12px;
}

.scenario-text h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
  color: #25333D;
  margin: 20px 0 12px;
}

.step-list {
  margin: 0 0 16px 20px;
}

.step-list li {
  font-size: 15px;
  color: #4A5A63;
  margin-bottom: 8px;
  position: relative;
  padding-left: 4px;
}

.step-list:not([type]) li::before,
ul.step-list li::before {
  content: "·";
  color: #E8A33D;
  font-weight: 700;
  position: absolute;
  left: -14px;
}

ol.step-list {
  list-style: decimal;
}

ol.step-list li::before {
  content: none;
}

.scenario-figure {
  min-width: 0;
  position: sticky;
  top: 100px;
}

.scenario-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 6px;
}

/* ---------- 相关卡片 ---------- */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.related-card {
  display: block;
  padding: 20px;
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.related-card:hover {
  border-color: #1B4E6B;
}

.related-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 6px;
}

.related-card p {
  font-size: 14px;
  color: #6B7B85;
}

/* ==========================================================================
   Pages · 更新记录 (changelog)
   ========================================================================== */
.timeline-section {
  margin-bottom: 48px;
}

.timeline-wrap {
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  padding: 32px;
}

.timeline-intro {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 32px;
}

.timeline-intro-text h2 {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 12px;
}

.timeline-intro-text p {
  font-size: 15px;
  color: #4A5A63;
  line-height: 1.6;
}

.timeline-figure {
  min-width: 0;
}

.timeline-figure img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 6px;
}

.timeline-list {
  position: relative;
  padding-left: 24px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: #D8E0E5;
}

.timeline-item {
  position: relative;
  padding: 0 0 32px 24px;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 4px;
  width: 12px;
  height: 12px;
  background-color: #E8A33D;
  border: 2px solid #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 0 0 2px #E8A33D;
}

.timeline-date {
  font-size: 13px;
  font-weight: 600;
  color: #E8A33D;
  margin-bottom: 4px;
}

.timeline-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 8px;
}

.timeline-points {
  margin: 0 0 8px 20px;
}

.timeline-points li {
  font-size: 15px;
  color: #4A5A63;
  margin-bottom: 6px;
  list-style: disc;
}

.timeline-note {
  font-size: 14px;
  color: #6B7B85;
  font-style: italic;
}

/* ---------- 更新说明 ---------- */
.update-note-section {
  padding: 40px 0 0;
  border-top: 1px solid #D8E0E5;
}

.update-note-section h2 {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 16px;
}

.update-note-content p {
  font-size: 15px;
  color: #4A5A63;
  line-height: 1.7;
  margin-bottom: 12px;
  max-width: 720px;
}

.update-note-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 16px;
}

/* ==========================================================================
   Pages · 引用规则 (citing)
   ========================================================================== */
.citation-sample {
  margin-bottom: 48px;
}

.section-intro {
  font-size: 15px;
  color: #6B7B85;
  margin-bottom: 24px;
  max-width: 720px;
}

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

.citation-item {
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  padding: 24px;
}

.citation-title {
  font-size: 16px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 6px;
}

.citation-context {
  font-size: 14px;
  color: #6B7B85;
  margin-bottom: 12px;
}

.citation-format {
  background-color: #FFFFFF;
  border-left: 3px solid #E8A33D;
  padding: 16px 20px;
  font-size: 14px;
  color: #25333D;
  line-height: 1.6;
  font-family: 'Courier New', monospace;
}

/* ---------- 使用边界 ---------- */
.usage-boundary {
  margin-bottom: 48px;
}

.boundary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.boundary-column {
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  padding: 24px;
}

.boundary-allow .boundary-title {
  color: #1B4E6B;
}

.boundary-avoid .boundary-title {
  color: #B85C38;
}

.boundary-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.boundary-list li {
  font-size: 15px;
  color: #4A5A63;
  margin-bottom: 10px;
  padding-left: 20px;
  position: relative;
}

.boundary-allow .boundary-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #1B4E6B;
  font-weight: 700;
}

.boundary-avoid .boundary-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  color: #B85C38;
  font-weight: 700;
}

/* ---------- 引用说明 ---------- */
.citation-note {
  padding: 40px 0 0;
  border-top: 1px solid #D8E0E5;
}

.note-text {
  font-size: 15px;
  color: #4A5A63;
  line-height: 1.7;
  max-width: 720px;
}

.note-text a {
  color: #1B4E6B;
  font-weight: 600;
}

.note-text a:hover {
  color: #E8A33D;
}

/* ==========================================================================
   Pages · 常见问题 (faq)
   ========================================================================== */
.faq-section {
  margin-bottom: 48px;
}

.faq-section-title {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 8px;
}

.faq-section-desc {
  font-size: 15px;
  color: #6B7B85;
  margin-bottom: 20px;
  max-width: 720px;
}

.faq-inline-link {
  color: #1B4E6B;
  font-weight: 600;
}

.faq-inline-link:hover {
  color: #E8A33D;
}

/* ---------- FAQ 相关 ---------- */
.faq-related {
  padding: 40px 0 0;
  border-top: 1px solid #D8E0E5;
}

.faq-related-title {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 8px;
}

.faq-related-desc {
  font-size: 15px;
  color: #6B7B85;
  margin-bottom: 20px;
}

.faq-related-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.faq-related-item {
  padding: 16px;
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.faq-related-item:hover {
  border-color: #1B4E6B;
}

.faq-related-link {
  font-size: 15px;
  color: #1B4E6B;
  font-weight: 500;
}

.faq-related-link:hover {
  color: #E8A33D;
}

/* ==========================================================================
   Pages · 关于我们 (about)
   ========================================================================== */
.principles {
  margin-bottom: 48px;
}

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

.principle-card {
  padding: 24px;
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.principle-card:hover {
  border-color: #1B4E6B;
}

.principle-title {
  font-size: 16px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid #E8A33D;
  display: inline-block;
}

.principle-text {
  font-size: 14px;
  color: #4A5A63;
  line-height: 1.6;
}

/* ---------- 服务边界 ---------- */
.boundaries {
  padding: 40px 0 0;
  border-top: 1px solid #D8E0E5;
}

.boundaries .section-title {
  margin-bottom: 24px;
}

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

.boundary-item {
  padding: 20px 24px;
  background-color: #F5F7FA;
  border: 1px solid #D8E0E5;
  border-radius: 6px;
}

.boundary-title {
  font-size: 16px;
  font-weight: 600;
  color: #1B4E6B;
  margin-bottom: 8px;
}

.boundary-text {
  font-size: 15px;
  color: #4A5A63;
  line-height: 1.6;
}

/* ==========================================================================
   Pages · 404
   ========================================================================== */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-section {
  text-align: center;
  max-width: 480px;
  padding: 48px 24px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #1B4E6B;
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 600;
  color: #25333D;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 15px;
  color: #6B7B85;
  margin-bottom: 8px;
}

.error-link {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 28px;
  background-color: #1B4E6B;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  transition: background-color 0.2s ease;
}

.error-link:hover {
  background-color: #163E55;
  color: #FFFFFF;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

/* ---------- 平板及以下 ---------- */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .site-main {
    padding: 0 20px;
  }

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

  .detail-block {
    gap: 24px;
  }

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

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

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

  .timeline-figure img {
    height: 160px;
  }
}

/* ---------- 手机端 ---------- */
@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
    gap: 12px;
  }

  .brand-name {
    font-size: 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background-color: #FFFFFF;
    border-bottom: 2px solid #1B4E6B;
    box-shadow: 0 4px 12px rgba(37, 51, 61, 0.1);
    padding: 8px 16px 16px;
    gap: 0;
    z-index: 99;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: block;
    padding: 12px 8px;
    font-size: 16px;
    border-bottom: 1px solid #F0F3F5;
    border-radius: 0;
  }

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

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

  .nav-link.is-current {
    color: #1B4E6B;
    background-color: #F5F7FA;
    font-weight: 600;
  }

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

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

  .page-title {
    font-size: 28px;
  }

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

  .hero-title {
    font-size: 28px;
  }

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

  .hero-img {
    height: 200px;
  }

  /* 服务索引 */
  .index-row {
    grid-template-columns: 40px 1fr;
    gap: 8px;
    padding: 14px 16px;
  }

  .index-summary {
    grid-column: 1 / -1;
    padding-left: 48px;
  }

  /* 服务详情 */
  .detail-block {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 32px;
  }

  .detail-reverse .detail-text {
    order: 1;
  }

  .detail-reverse .detail-figure {
    order: 2;
  }

  .detail-img {
    height: 180px;
  }

  /* 场景预览 */
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  /* 合作流程 */
  .process-steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 内页 page-head */
  .page-head {
    margin-bottom: 32px;
  }

  .page-head-image {
    max-height: 200px;
  }

  /* 字段说明 */
  .schema-overview-inner {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .schema-image {
    height: 180px;
  }

  .table-wrapper {
    margin: 0 -16px;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .field-table {
    min-width: 640px;
  }

  .relation-notes-inner {
    padding: 24px;
  }

  /* 使用示例 */
  .scenario-block {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 32px 0;
  }

  .scenario-figure {
    position: static;
  }

  .scenario-img {
    height: 180px;
  }

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

  /* 更新记录 */
  .timeline-wrap {
    padding: 24px;
  }

  .timeline-list {
    padding-left: 16px;
  }

  .timeline-item {
    padding-left: 16px;
  }

  /* 引用规则 */
  .boundary-grid {
    grid-template-columns: 1fr;
  }

  .citation-item {
    padding: 20px;
  }

  /* FAQ */
  .faq-related-list {
    grid-template-columns: 1fr;
  }

  /* 关于我们 */
  .principle-grid {
    grid-template-columns: 1fr;
  }

  /* 页脚 */
  .footer-inner {
    gap: 32px;
    padding: 32px 16px 16px;
  }

  .footer-links {
    gap: 24px;
  }

  /* 相关链接 */
  .related-links {
    padding: 16px;
    gap: 8px;
  }

  /* 404 */
  .error-code {
    font-size: 56px;
  }
}

/* ---------- 小屏手机 ---------- */
@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    text-align: center;
  }

  .process-link .btn-primary {
    width: 100%;
    text-align: center;
  }

  .timeline-intro {
    gap: 16px;
  }

  .timeline-figure img {
    height: 140px;
  }

  .footer-links {
    flex-direction: column;
    gap: 20px;
  }
}