/* ============================================================
   BASE — 全局基础
   ============================================================ */
:root {
  --color-ink: #1d232e;
  --color-panel: #f5f7fa;
  --color-primary: #2f6fda;
  --color-accent: #d98324;
  --color-text: #26303b;
  --color-border: #dde3ea;
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-card: 0 1px 3px rgba(29, 35, 46, 0.06);
  --shadow-hover: 0 4px 14px rgba(29, 35, 46, 0.1);
  --transition-base: 0.2s ease;
}

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

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

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

h1,
h2,
h3,
h4 {
  margin: 0 0 0.5em;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.3;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
}

li {
  margin-bottom: 0.4em;
}

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

figure {
  margin: 0;
}

/* ============================================================
   LAYOUT — 布局骨架
   ============================================================ */
.site-header {
  background: var(--color-ink);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid var(--color-primary);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.brand-name {
  color: #ffffff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

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

.site-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
}

.site-nav li {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  color: #c7d0dc;
  font-size: 15px;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background var(--transition-base);
}

.nav-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-link.is-current {
  color: #ffffff;
  background: var(--color-primary);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: #ffffff;
  border-radius: 1px;
}

.site-main {
  display: block;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px 60px;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */
.breadcrumb {
  padding: 20px 0 4px;
  font-size: 14px;
  color: #6b7684;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

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

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

.breadcrumb-sep {
  color: #9aa5b1;
}

.breadcrumb-current {
  color: #6b7684;
}

.page-header {
  padding: 16px 0 8px;
}

.page-title {
  font-size: 32px;
  margin: 0;
  color: var(--color-ink);
}

.page-intro {
  font-size: 16px;
  color: #4a5561;
  max-width: 720px;
  margin: 0 0 1em;
}

.btn-primary,
.btn-light {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
  line-height: 1.4;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: #2458b8;
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-light {
  background: #ffffff;
  color: var(--color-ink);
}

.btn-light:hover {
  background: var(--color-panel);
  color: var(--color-primary);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  font-size: 15px;
}

.text-link::after {
  content: "→";
  transition: transform var(--transition-base);
}

.text-link:hover::after {
  transform: translateX(3px);
}

.content-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.content-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: #6b7684;
  background: var(--color-panel);
  border-top: 1px solid var(--color-border);
}

.content-media-inline {
  max-width: 720px;
  margin: 8px 0 16px;
}

.content-media-inline img {
  aspect-ratio: 16 / 7;
}

.content-media-primary {
  margin: 0;
  width: 100%;
}

.content-media-primary img {
  aspect-ratio: 21 / 9;
}

.info-panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 16px 0;
}

.info-panel ul {
  margin: 0;
  padding-left: 1.2em;
}

.info-panel li {
  margin-bottom: 6px;
}

/* ============================================================
   COMPONENTS — 导航与页脚
   ============================================================ */
.site-footer {
  background: var(--color-ink);
  color: #aeb8c4;
  margin-top: 60px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 20px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 8px;
}

.footer-tagline {
  font-size: 14px;
  color: #8b96a3;
  margin: 0;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 15px;
  color: #ffffff;
  margin: 0 0 12px;
  font-weight: 600;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li {
  margin: 0 0 8px;
}

.footer-col a {
  color: #aeb8c4;
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 20px;
  text-align: center;
  font-size: 13px;
  color: #7c8692;
}

.footer-bottom p {
  margin: 0;
}

/* ============================================================
   COMPONENTS — 卡片、列表、表格
   ============================================================ */
.service-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.card-index {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(217, 131, 36, 0.1);
  border-radius: var(--radius-sm);
  padding: 2px 10px;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.service-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 14px;
  color: #4a5561;
  margin-bottom: 12px;
  line-height: 1.7;
}

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

.steps-horizontal {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.step-item {
  position: relative;
  padding: 20px 16px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.step-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: #4a5561;
}

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

.entry-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.entry-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}

.entry-card h3 {
  margin-bottom: 8px;
}

.entry-card p {
  font-size: 14px;
  color: #4a5561;
  margin-bottom: 12px;
}

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

.audience-col {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
}

.audience-col h3 {
  margin-bottom: 10px;
}

.audience-col p {
  font-size: 14px;
  color: #4a5561;
  margin: 0;
}

.faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.faq-list li {
  margin: 0 0 12px;
}

.faq-link {
  display: block;
  padding: 16px 20px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--color-ink);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.faq-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
  color: var(--color-primary);
}

.field-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}

.field-table {
  width: 100%;
  border: 1px solid var(--color-border);
  font-size: 14px;
}

.field-table th,
.field-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.field-table th {
  background: var(--color-panel);
  font-weight: 600;
  color: var(--color-ink);
  white-space: nowrap;
}

.field-table td {
  color: #4a5561;
  vertical-align: top;
}

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

.field-note {
  background: var(--color-panel);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13px;
  color: #6b7684;
}

.field-note p {
  margin: 0;
}

.version-tag {
  display: inline-block;
  background: var(--color-primary);
  color: #ffffff;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 2px 10px;
  white-space: nowrap;
}

.log-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.log-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.log-content {
  font-size: 14px;
  color: #4a5561;
}

.log-content p {
  margin: 0;
}

.catalog-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.catalog-item {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.catalog-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.catalog-item p {
  font-size: 14px;
  color: #4a5561;
  margin: 0;
}

/* ============================================================
   COMPONENTS — FAQ 折叠
   ============================================================ */
.faq-group {
  margin-bottom: 40px;
}

.faq-group h2 {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  background: #ffffff;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-base);
}

.faq-item summary:hover {
  background: var(--color-panel);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition-base);
}

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

.faq-item p {
  padding: 0 20px 16px;
  margin: 0;
  font-size: 14px;
  color: #4a5561;
  line-height: 1.7;
}

/* ============================================================
   COMPONENTS — 侧栏
   ============================================================ */
.sidebar {
  min-width: 0;
}

.sidebar-inner {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: sticky;
  top: 84px;
}

.sidebar h2,
.sidebar-content h2,
.sidebar-secondary h2,
.sidebar-related h2 {
  font-size: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.related-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}

.related-card h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.related-card p {
  font-size: 13px;
  color: #6b7684;
  margin: 0 0 8px;
  line-height: 1.6;
}

.related-card a {
  font-size: 13px;
}

.sidebar-content,
.sidebar-secondary,
.sidebar-related {
  min-width: 0;
}

.sidebar-card,
.aside-card {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
}

.sidebar-links,
.aside-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-links li,
.aside-links li {
  margin: 0 0 8px;
}

.sidebar-links a,
.aside-links a {
  font-size: 14px;
}

.aside-cta {
  display: block;
  text-align: center;
}

/* ============================================================
   COMPONENTS — 相关链接条
   ============================================================ */
.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 0;
  margin-top: 32px;
  border-top: 1px solid var(--color-border);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

.related-links-item {
  display: inline-block;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--color-text);
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

/* ============================================================
   PAGES — 首页
   ============================================================ */
.hero-section {
  background: var(--color-ink);
  color: #ffffff;
  padding: 72px 0 48px;
}

.hero-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  color: #ffffff;
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  color: #c7d0dc;
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.brand-story {
  background: var(--color-panel);
  padding: 56px 0;
}

.story-text {
  font-size: 17px;
  max-width: 800px;
  margin: 0 auto 32px;
  text-align: center;
}

.key-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 720px;
  margin: 0 auto;
}

.point-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.point-mark {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
}

.point-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #4a5561;
}

.section {
  padding: 56px 0;
}

.alt-bg {
  background: var(--color-panel);
}

.section h2 {
  margin-bottom: 8px;
}

.section-desc {
  color: #4a5561;
  margin-bottom: 28px;
  max-width: 680px;
}

.process-preview .steps-horizontal {
  margin-top: 8px;
}

.data-entry h2 {
  margin-bottom: 24px;
}

.audience-section h2 {
  margin-bottom: 24px;
}

.faq-preview h2 {
  margin-bottom: 24px;
}

.contact-cta {
  background: var(--color-ink);
  color: #ffffff;
}

.contact-cta h2 {
  color: #ffffff;
  margin-bottom: 12px;
}

.contact-cta p {
  color: #c7d0dc;
  max-width: 560px;
  margin-bottom: 28px;
}

/* ============================================================
   PAGES — 内页布局
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

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

.page-title-area {
  margin-bottom: 20px;
}

.page-title-area > p {
  font-size: 15px;
  color: #4a5561;
  max-width: 680px;
}

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

.page-title-block p {
  font-size: 15px;
  color: #4a5561;
  max-width: 680px;
}

.page-title-section p {
  font-size: 15px;
  color: #4a5561;
  max-width: 680px;
  margin-bottom: 24px;
}

.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

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

.section-intro {
  color: #4a5561;
  margin-bottom: 24px;
}

/* ============================================================
   PAGES — 服务页
   ============================================================ */
.service-matrix .service-card {
  margin-bottom: 16px;
}

.service-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.service-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.service-card-head h3 {
  margin: 0;
}

.service-meta {
  margin: 0 0 12px;
  font-size: 13px;
  color: #6b7684;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.service-meta dt {
  display: inline;
  font-weight: 600;
  color: var(--color-ink);
}

.service-meta dd {
  display: inline;
  margin: 0;
}

.meta-row {
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.deliverable-panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.deliverable-panel h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.deliverable-panel p {
  margin: 0;
  font-size: 14px;
  color: #4a5561;
}

.combination p {
  font-size: 15px;
  color: #4a5561;
  max-width: 680px;
}

/* ============================================================
   PAGES — 方法页
   ============================================================ */
.step-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.step-list .step-item {
  display: flex;
  gap: 16px;
  text-align: left;
  align-items: flex-start;
  margin-bottom: 12px;
  padding: 20px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}

.method-steps-section .step-content {
  flex: 1;
}

.step-content p {
  margin: 0;
  font-size: 14px;
  color: #4a5561;
}

.example-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin: 16px 0 32px;
}

.example-text p {
  font-size: 14px;
  color: #4a5561;
}

.example-media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.example-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.prep-list {
  margin: 0;
  padding-left: 1.2em;
}

.prep-list li {
  font-size: 14px;
  color: #4a5561;
  margin-bottom: 6px;
}

/* ============================================================
   PAGES — 数据页
   ============================================================ */
.field-figure {
  margin: 16px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.field-figure figcaption {
  padding: 8px 16px;
  font-size: 13px;
  color: #6b7684;
  background: var(--color-panel);
}

.update-log-block .log-item {
  margin-bottom: 12px;
}

/* ============================================================
   PAGES — FAQ 页
   ============================================================ */
.faq-related {
  margin-top: 40px;
}

.related-entry-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.related-entry-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.related-entry-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}

.related-entry-card h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.related-entry-card p {
  font-size: 14px;
  color: #4a5561;
  margin-bottom: 12px;
}

.related-link {
  font-weight: 600;
  font-size: 15px;
}

/* ============================================================
   PAGES — 合作意向页
   ============================================================ */
.cooperation-steps .step-item {
  display: flex;
  gap: 16px;
  text-align: left;
  align-items: flex-start;
  margin-bottom: 12px;
  padding: 20px;
}

.cooperation-steps .step-content {
  flex: 1;
}

.cooperation-steps .step-content h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.cooperation-steps .step-content p {
  margin: 0;
  font-size: 14px;
  color: #4a5561;
}

.preparation-list .info-panel ul li strong {
  color: var(--color-ink);
}

.follow-up p {
  font-size: 15px;
  color: #4a5561;
  max-width: 680px;
}

.content-media + .related-entry {
  margin-top: 24px;
}

.related-entry h2 {
  margin-bottom: 8px;
}

.related-entry > p {
  font-size: 15px;
  color: #4a5561;
  max-width: 680px;
}

.related-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.related-links a {
  display: inline-block;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 20px;
  font-size: 14px;
  color: var(--color-text);
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

.sidebar-related {
  margin-top: 32px;
}

.sidebar-related .sidebar-card {
  background: #ffffff;
}

.sidebar-related .sidebar-card a {
  font-weight: 600;
  font-size: 15px;
}

.sidebar-related .sidebar-card p {
  font-size: 13px;
  color: #6b7684;
  margin: 4px 0 0;
}

/* ============================================================
   PAGES — 404
   ============================================================ */
.error-main {
  background: var(--color-panel);
  min-height: calc(100vh - 64px - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-panel {
  text-align: center;
  padding: 60px 20px;
}

.error-code {
  font-size: 80px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 8px;
  line-height: 1;
}

.error-panel h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  color: #4a5561;
  margin-bottom: 24px;
}

.error-action {
  display: inline-block;
  background: var(--color-primary);
  color: #ffffff;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
}

.error-action:hover {
  background: #2458b8;
  color: #ffffff;
}

/* ============================================================
   RESPONSIVE — 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps-horizontal {
    grid-template-columns: repeat(3, 1fr);
  }

  .steps-horizontal .step-item:nth-child(4),
  .steps-horizontal .step-item:nth-child(5) {
    grid-column: span 1;
  }

  .page-layout,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
  }
}

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-ink);
    border-bottom: 2px solid var(--color-primary);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav.is-open {
    max-height: 420px;
    overflow-y: auto;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
  }

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

  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0 16px;
  }

  .hero-section {
    padding: 48px 0 32px;
  }

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

  .hero-lead {
    font-size: 15px;
  }

  .content-media-primary img {
    aspect-ratio: 16 / 9;
  }

  .brand-story {
    padding: 40px 0;
  }

  .section {
    padding: 40px 0;
  }

  .service-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .steps-horizontal {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .entry-grid,
  .audience-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .sidebar-inner,
  .sidebar-card,
  .aside-card {
    position: static;
  }

  .example-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .catalog-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .related-entry-inner {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

  .inner-main {
    padding: 0 16px 40px;
  }

  .breadcrumb {
    padding: 16px 0 4px;
  }

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

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 20px;
  }

  .container {
    padding: 0 16px;
  }

  .log-item {
    flex-direction: column;
    gap: 8px;
  }

  .field-table {
    font-size: 13px;
  }

  .field-table th,
  .field-table td {
    padding: 10px 12px;
  }

  .related-links {
    gap: 8px;
  }

  .related-links-item {
    padding: 6px 12px;
    font-size: 12px;
  }

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

@media (max-width: 480px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .brand-name {
    font-size: 17px;
  }

  .btn-primary,
  .btn-light {
    padding: 10px 20px;
    font-size: 14px;
  }

  .step-item {
    padding: 16px 12px;
  }

  .point-item {
    padding: 16px;
  }

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

  .faq-item p {
    padding: 0 16px 14px;
    font-size: 13px;
  }

  .hero-copy h1 {
    font-size: 24px;
  }

  .error-panel {
    padding: 40px 16px;
  }

  .error-code {
    font-size: 48px;
  }
}