/* ============================================================
   BASE — 全站基础
   ============================================================ */
:root {
  --color-bg: #F5F1EA;
  --color-text: #1F2A36;
  --color-accent: #C4542B;
  --color-muted: #8A9A9B;
  --color-card: #FFFFFF;
  --color-border: #E0D8CC;
  --color-border-dark: #C9BFB0;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1180px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #9E421F;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

p {
  line-height: 1.75;
}

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

/* ============================================================
   LAYOUT — 全站布局骨架
   ============================================================ */
.site-header {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand-link {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  padding: var(--space-1) 0;
}

.brand-name {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 2px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-list li {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: var(--space-2) var(--space-1);
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.nav-link.is-current {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

.header-cta {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: background-color 0.2s ease;
}

.header-cta:hover {
  background-color: #9E421F;
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-3) var(--space-6);
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-3) 0;
  font-size: 14px;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-muted);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb-sep {
  margin: 0 var(--space-1);
  color: var(--color-border-dark);
}

.breadcrumb-current {
  color: var(--color-text);
}

/* 页面标题区 */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-3) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.page-description {
  font-size: 16px;
  color: #4A5560;
  max-width: 760px;
  line-height: 1.75;
}

/* 页脚 */
.site-footer {
  background-color: #E9E3D8;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-3) var(--space-3);
  display: grid;
  grid-template-columns: 280px 1fr 1fr 1fr;
  gap: var(--space-4);
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.footer-brand-desc {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
}

.footer-col h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.footer-col ul li {
  margin-bottom: var(--space-1);
}

.footer-col ul a {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
}

.footer-col ul a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  text-align: center;
  font-size: 13px;
  color: var(--color-muted);
  background-color: #E2DCCF;
}

/* 相关链接条 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-3) var(--space-5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-right: var(--space-1);
}

.related-links-item {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */
/* 按钮 */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-accent);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.btn-primary:hover {
  background-color: #9E421F;
  border-color: #9E421F;
  color: #fff;
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background-color: transparent;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-dark);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 区块标题 */
.section-head {
  margin-bottom: var(--space-4);
}

.section-head h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-1);
  position: relative;
  padding-left: 18px;
}

.section-head h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.section-head p {
  font-size: 15px;
  color: #5A6A70;
  max-width: 720px;
}

.section-desc {
  font-size: 15px;
  color: #5A6A70;
  max-width: 720px;
}

.section-title {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-2);
}

/* FAQ 折叠 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: var(--color-border-dark);
}

.faq-item[open] {
  border-color: var(--color-accent);
}

.faq-item summary {
  padding: var(--space-2) var(--space-3);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
  display: flex;
  align-items: center;
  min-height: 48px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: var(--space-2);
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

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

.faq-item p {
  padding: 0 var(--space-3) var(--space-2);
  font-size: 15px;
  color: #4A5560;
}

/* 内容媒体 */
.content-media {
  margin: var(--space-3) 0;
}

.content-media img {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: var(--space-1);
  text-align: center;
}

.content-media-inline {
  max-width: 100%;
}

/* ============================================================
   INDEX — 首页
   ============================================================ */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* 首屏服务公告板 */
.board-section {
  padding: var(--space-6) 0 var(--space-5);
}

.board-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}

.board-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.board-kicker {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.board-copy h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.board-lead {
  font-size: 17px;
  line-height: 1.8;
  color: #4A5560;
  margin-bottom: var(--space-4);
  max-width: 520px;
}

.board-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.notice-strip {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  background-color: #F0E9DE;
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  max-width: 520px;
}

.notice-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
  padding-top: 2px;
}

.notice-strip p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
}

.board-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(31, 42, 54, 0.08);
}

.board-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* 服务状态带 */
.status-strip {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border);
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.status-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  min-height: 120px;
}

.status-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(196, 84, 43, 0.1);
}

.status-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: "SF Mono", Consolas, monospace;
}

.status-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
}

.status-desc {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
}

/* 首页通用区块 */
.section-block {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border);
}

/* 服务能力摘要 */
.summary-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.summary-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease;
  align-items: flex-start;
}

.summary-item:hover {
  border-color: var(--color-accent);
}

.summary-index {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-accent);
  font-family: "SF Mono", Consolas, monospace;
  flex-shrink: 0;
  min-width: 32px;
}

.summary-content {
  flex: 1;
  min-width: 0;
}

.summary-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.summary-content p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
  margin-bottom: var(--space-2);
}

.summary-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  margin-top: var(--space-1);
}

/* 业务场景摘要 */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.scenario-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
}

.scenario-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 12px rgba(31, 42, 54, 0.08);
}

.scenario-card figure {
  margin: 0;
  overflow: hidden;
}

.scenario-card figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.scenario-body {
  padding: var(--space-3);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.scenario-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.scenario-body p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
  margin-bottom: var(--space-2);
  flex: 1;
}

.scenario-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  align-self: flex-start;
}

/* 合作流程预览 */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.step-item {
  position: relative;
  padding: var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 110px;
  display: flex;
  flex-direction: column;
}

.step-item:hover {
  border-color: var(--color-accent);
}

.step-number {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: "SF Mono", Consolas, monospace;
  margin-bottom: var(--space-1);
}

.step-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.step-item p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
}

.process-more-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  padding: var(--space-1) 0;
  border-bottom: 2px solid var(--color-accent);
}

/* FAQ 预览 */
.faq-preview .faq-list {
  max-width: 800px;
}

.faq-more-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  margin-top: var(--space-3);
  padding: var(--space-1) 0;
  border-bottom: 2px solid var(--color-accent);
}

/* 更新动态摘要 */
.update-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.update-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease;
  align-items: flex-start;
}

.update-item:hover {
  border-color: var(--color-accent);
}

.update-date {
  font-size: 14px;
  color: var(--color-muted);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 2px;
  font-family: "SF Mono", Consolas, monospace;
}

.update-content {
  flex: 1;
  min-width: 0;
}

.update-content h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.update-content p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
}

.update-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  margin-top: var(--space-1);
}

/* ============================================================
   SERVICES — 服务能力页
   ============================================================ */
.layout-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.sidebar-left {
  grid-template-columns: 280px 1fr;
}

.sidebar-left .sidebar-panel {
  order: 1;
}

.sidebar-left .content-panel {
  order: 2;
}

.sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 0;
}

.sidebar-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.sidebar-card h2 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-card p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.7;
}

.sidebar-card a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  margin-top: var(--space-2);
}

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

.service-figure {
  margin: 0 0 var(--space-4);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.service-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.service-list {
  margin-bottom: var(--space-5);
}

.service-list > h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.section-lead {
  font-size: 15px;
  color: #5A6A70;
  margin-bottom: var(--space-4);
  max-width: 700px;
}

.service-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.service-item:first-of-type {
  border-top: 1px solid var(--color-border);
}

.service-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-accent);
  font-family: "SF Mono", Consolas, monospace;
  flex-shrink: 0;
  min-width: 60px;
  line-height: 1.2;
}

.service-content {
  flex: 1;
  min-width: 0;
}

.service-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.service-stage {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.service-desc {
  font-size: 15px;
  color: #4A5560;
  margin-bottom: var(--space-2);
  line-height: 1.75;
}

.service-deliverable {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.6;
  padding: var(--space-2);
  background-color: #F0E9DE;
  border-radius: var(--radius-sm);
}

.scenario-guide {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.scenario-guide h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.scenario-guide p {
  font-size: 15px;
  color: #4A5560;
  line-height: 1.75;
  margin-bottom: var(--space-2);
}

.scenario-guide a {
  display: inline-block;
  font-weight: 600;
  margin-top: var(--space-1);
}

/* ============================================================
   SCENARIOS — 业务场景页
   ============================================================ */
.filter-tips {
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.filter-tips p {
  font-size: 15px;
  color: #4A5560;
  margin-bottom: var(--space-3);
  max-width: 760px;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter-tags li {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: #F0E9DE;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.scenario-grid .section-title {
  margin-bottom: var(--space-3);
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.scenario-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.scenario-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.scenario-content {
  padding: var(--space-3);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.scenario-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.scenario-goal {
  font-size: 14px;
  color: #4A5560;
  line-height: 1.7;
  margin-bottom: var(--space-2);
}

.scenario-challenge {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.7;
  margin-bottom: var(--space-2);
}

.scenario-path {
  font-size: 14px;
  color: #5A6A70;
  margin-bottom: var(--space-2);
}

.scenario-path a {
  font-weight: 600;
  margin: 0 var(--space-1);
}

.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  margin-top: auto;
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
}

.scenario-tips {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.scenario-tips .section-title {
  margin-bottom: var(--space-3);
}

.tips-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.tip-item {
  padding: var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.tip-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.tip-item p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.7;
}

.tips-footer {
  font-size: 15px;
  color: #4A5560;
  line-height: 1.75;
}

.tips-footer a {
  font-weight: 600;
  margin: 0 var(--space-1);
}

/* ============================================================
   PROCESS — 合作流程页
   ============================================================ */
.process-overview {
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.overview-head {
  margin-bottom: var(--space-3);
}

.overview-head h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.overview-head p {
  font-size: 15px;
  color: #5A6A70;
}

.overview-step-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
}

.overview-step {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background-color: #F5F1EA;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.overview-step .step-index {
  font-size: 14px;
  font-weight: 800;
  color: var(--color-accent);
  font-family: "SF Mono", Consolas, monospace;
  flex-shrink: 0;
}

.overview-step .step-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.process-timeline {
  margin-bottom: var(--space-5);
}

.timeline-head {
  margin-bottom: var(--space-4);
}

.timeline-head h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.timeline-head p {
  font-size: 15px;
  color: #5A6A70;
  max-width: 720px;
}

.timeline-step {
  position: relative;
  padding: 0 0 var(--space-4) var(--space-4);
  border-left: 2px solid var(--color-border);
  margin-left: var(--space-2);
}

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

.timeline-step::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 2px solid var(--color-card);
}

.timeline-step-head {
  margin-bottom: var(--space-2);
}

.timeline-step-head .step-number {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: "SF Mono", Consolas, monospace;
  display: block;
  margin-bottom: var(--space-1);
}

.timeline-step-head h3 {
  font-size: 19px;
  font-weight: 700;
}

.timeline-step-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.timeline-step-body .step-item {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
  min-height: 0;
}

.timeline-step-body .step-item .item-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
  min-width: 64px;
}

.timeline-step-body .step-item p {
  font-size: 14px;
  color: #4A5560;
  line-height: 1.7;
  flex: 1;
}

.process-checklist {
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.checklist-head {
  margin-bottom: var(--space-3);
}

.checklist-head h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.checklist-head p {
  font-size: 15px;
  color: #5A6A70;
}

.checklist-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: #F5F1EA;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.check-mark {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
  line-height: 1.5;
}

.checklist-item p {
  font-size: 15px;
  color: #4A5560;
  line-height: 1.7;
  flex: 1;
}

.process-next {
  padding: var(--space-4);
  background-color: #F0E9DE;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.next-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.next-text p {
  font-size: 15px;
  color: #4A5560;
  line-height: 1.7;
}

/* ============================================================
   FAQ — 常见问题页
   ============================================================ */
.page-layout {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}

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

.page-layout.sidebar-left .faq-sidebar {
  order: 1;
}

.page-layout.sidebar-left .faq-content {
  order: 2;
}

.faq-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 0;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--color-border);
}

.faq-anchor-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.faq-anchor-list li a {
  display: block;
  padding: var(--space-2);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.faq-anchor-list li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.sidebar-note {
  padding: var(--space-3);
  background-color: #F0E9DE;
  border-radius: var(--radius-md);
}

.sidebar-note p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.7;
  margin-bottom: var(--space-2);
}

.sidebar-note a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
}

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

.faq-cover {
  margin: 0 0 var(--space-4);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.faq-cover img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.faq-cover figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-card);
}

.faq-category {
  margin-bottom: var(--space-5);
}

.faq-category-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.faq-category-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 48px;
  height: 2px;
  background-color: var(--color-accent);
}

.faq-next-step {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.faq-next-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.faq-next-step p {
  font-size: 15px;
  color: #4A5560;
  line-height: 1.75;
}

.faq-next-step p a {
  font-weight: 600;
  margin: 0 var(--space-1);
}

/* ============================================================
   ABOUT — 关于我们页
   ============================================================ */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  align-items: center;
}

.intro-text h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-3);
}

.intro-text p {
  font-size: 15px;
  color: #4A5560;
  line-height: 1.8;
  margin-bottom: var(--space-2);
}

.intro-media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.intro-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.about-principles {
  margin-bottom: var(--space-5);
}

.about-principles > h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.principles-lead {
  font-size: 15px;
  color: #5A6A70;
  margin-bottom: var(--space-4);
  max-width: 720px;
}

.principles-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.principle-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  align-items: flex-start;
}

.principle-no {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-accent);
  font-family: "SF Mono", Consolas, monospace;
  flex-shrink: 0;
  line-height: 1.2;
}

.principle-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.principle-item p {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.7;
}

.about-boundary {
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.about-boundary > h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.boundary-lead {
  font-size: 15px;
  color: #5A6A70;
  margin-bottom: var(--space-3);
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.boundary-list li {
  padding: var(--space-2) var(--space-3);
  background-color: #F5F1EA;
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: #4A5560;
  line-height: 1.7;
}

.boundary-more {
  margin-top: var(--space-3);
  font-size: 15px;
  color: #4A5560;
}

.boundary-more a {
  font-weight: 600;
  margin: 0 var(--space-1);
}

.about-related {
  padding: var(--space-4);
  background-color: #F0E9DE;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.about-related h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.about-related > p {
  font-size: 15px;
  color: #4A5560;
  margin-bottom: var(--space-3);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.related-links li a {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.related-links li a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   UPDATES — 更新动态页
   ============================================================ */
.filter {
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.filter .section-title {
  margin-bottom: var(--space-3);
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.filter-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: #F5F1EA;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.filter-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-desc {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.7;
}

.list {
  margin-bottom: var(--space-5);
}

.list .section-title {
  margin-bottom: var(--space-4);
}

.category-title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.category-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 40px;
  height: 2px;
  background-color: var(--color-accent);
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.update-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  align-items: flex-start;
  transition: border-color 0.2s ease;
}

.update-item:hover {
  border-color: var(--color-accent);
}

.update-date {
  font-size: 14px;
  color: var(--color-muted);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 2px;
  font-family: "SF Mono", Consolas, monospace;
}

.update-category {
  display: inline-block;
  padding: 2px 10px;
  background-color: #F0E9DE;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.update-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--color-text);
}

.update-summary {
  font-size: 14px;
  color: #5A6A70;
  line-height: 1.7;
}

.pagination {
  padding: var(--space-3);
  background-color: #F0E9DE;
  border-radius: var(--radius-md);
  text-align: center;
}

.pagination p {
  font-size: 14px;
  color: #5A6A70;
}

/* ============================================================
   404 — 错误页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: var(--space-5) var(--space-3);
}

.error-content {
  text-align: center;
  max-width: 600px;
}

.error-code {
  font-size: 72px;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-3);
  font-family: "SF Mono", Consolas, monospace;
}

.error-content h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: var(--space-2);
}

.error-desc {
  font-size: 16px;
  color: #4A5560;
  margin-bottom: var(--space-2);
}

.error-tip {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.error-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   RESPONSIVE — 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

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

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

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

  .overview-step-list {
    grid-template-columns: repeat(5, auto);
    overflow-x: auto;
    padding-bottom: var(--space-2);
  }

  .overview-step {
    flex-shrink: 0;
  }

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

  .page-layout.sidebar-left {
    grid-template-columns: 200px 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    min-height: 64px;
    padding: 0 var(--space-2);
  }

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

  .brand-tagline {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-3);
    gap: var(--space-1);
    z-index: 100;
    box-shadow: 0 4px 12px rgba(31, 42, 54, 0.08);
  }

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

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

  .nav-link {
    display: block;
    padding: var(--space-2);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-link.is-current {
    border-bottom-color: var(--color-border);
    background-color: #F5F1EA;
    border-radius: var(--radius-sm);
  }

  .header-cta {
    display: none;
  }

  .home-main {
    padding: 0 var(--space-2);
  }

  .board-layout {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .board-copy h1 {
    font-size: 28px;
  }

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

  .board-figure {
    order: 2;
  }

  .status-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

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

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

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

  .step-item {
    min-height: 0;
  }

  .inner-main {
    padding: var(--space-3) var(--space-2) var(--space-5);
  }

  .breadcrumb {
    padding: var(--space-2) var(--space-2) 0;
  }

  .page-header {
    padding: var(--space-3) var(--space-2);
  }

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

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

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

  .sidebar-left .sidebar-panel {
    order: 2;
  }

  .sidebar-left .content-panel {
    order: 1;
  }

  .sidebar-panel {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-card {
    flex: 1 1 calc(50% - var(--space-2));
    min-width: 200px;
  }

  .service-item {
    flex-direction: column;
    gap: var(--space-2);
  }

  .service-number {
    min-width: 0;
  }

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

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

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

  .page-layout.sidebar-left .faq-sidebar {
    order: 2;
  }

  .page-layout.sidebar-left .faq-content {
    order: 1;
  }

  .faq-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .sidebar-title {
    flex-basis: 100%;
  }

  .faq-anchor-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .faq-anchor-list li a {
    white-space: nowrap;
  }

  .sidebar-note {
    flex-basis: 100%;
  }

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

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

  .overview-step-list {
    grid-template-columns: repeat(5, 1fr);
    overflow-x: auto;
  }

  .timeline-step {
    margin-left: var(--space-1);
    padding-left: var(--space-3);
  }

  .update-item {
    flex-wrap: wrap;
  }

  .update-date {
    flex-basis: 100%;
  }

  .update-category {
    margin-left: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .footer-brand {
    grid-column: 1;
  }

  .footer-col {
    margin-bottom: var(--space-2);
  }

  .related-links {
    padding: var(--space-3) var(--space-2);
    gap: var(--space-2);
  }

  .related-links-item {
    padding: var(--space-1) var(--space-2);
  }

  .error-code {
    font-size: 52px;
  }

  .error-content h1 {
    font-size: 24px;
  }

  .process-next {
    padding: var(--space-3);
  }

  .next-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .status-grid {
    grid-template-columns: 1fr;
  }

  .sidebar-card {
    flex-basis: 100%;
  }

  .filter-tags {
    gap: var(--space-1);
  }

  .filter-tag {
    padding: var(--space-1) var(--space-2);
    font-size: 13px;
  }

  .update-item {
    padding: var(--space-2);
  }

  .service-item {
    padding: var(--space-3) 0;
  }

  .timeline-step-body .step-item {
    flex-direction: column;
    gap: var(--space-1);
  }

  .timeline-step-body .step-item .item-label {
    min-width: 0;
  }

  .checklist-item {
    flex-direction: column;
    gap: var(--space-1);
  }

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

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