/* ============================================================
   base — 基础变量、重置与全局文字
   ============================================================ */
:root {
  --color-primary: #1b3e64;
  --color-accent: #c9911e;
  --color-bg: #f4f6f9;
  --color-text: #2d3e50;
  --color-text-light: #5a6b7c;
  --color-white: #ffffff;
  --color-border: #e2e8f0;
  --color-footer-bg: #16283c;
  --color-footer-text: #b8c4d0;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(27, 62, 100, 0.08);
  --shadow-hover: 0 4px 12px rgba(27, 62, 100, 0.12);
  --transition-base: 0.2s ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -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);
}

ul,
ol {
  list-style: none;
}

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

/* ============================================================
   layout — 全站统一容器、页头、页脚骨架
   ============================================================ */
.site-header {
  background-color: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(27, 62, 100, 0.25);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

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

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.logo:hover .logo-text {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.nav-link:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.12);
}

.nav-link.is-current {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.18);
  font-weight: 600;
}

.site-main {
  min-height: 60vh;
}

.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 28px 20px 16px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  flex: 1 1 280px;
}

.footer-logo {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(184, 196, 208, 0.85);
  max-width: 420px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  padding-top: 4px;
}

.footer-link {
  font-size: 14px;
  color: rgba(184, 196, 208, 0.9);
  padding: 4px 0;
}

.footer-link:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 12px 20px;
  text-align: center;
}

.copyright {
  font-size: 13px;
  color: rgba(184, 196, 208, 0.7);
}

/* ============================================================
   components — 通用按钮、面包屑、标题、卡片、列表
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  line-height: 1.5;
  min-height: 44px;
  transition: background-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: #b07f16;
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(201, 145, 30, 0.35);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border-color: var(--color-white);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

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

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

.breadcrumb-sep {
  color: #aeb8c2;
}

.breadcrumb-current {
  color: var(--color-primary);
  font-weight: 500;
}

.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-intro,
.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
  margin-bottom: 10px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

.section-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}

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

/* ============================================================
   pages / index — 首页
   ============================================================ */
.hero-section {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 56px 20px 48px;
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-white);
  margin-bottom: 16px;
}

.hero-description {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.hero-next-hint {
  margin-top: 24px;
}

.next-section-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  padding: 6px 0;
}

.next-section-link:hover {
  color: var(--color-accent);
}

.content-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.content-media img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.content-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  background-color: rgba(0, 0, 0, 0.25);
  text-align: center;
}

.home-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.home-main-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.home-sidebar {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.sidebar-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.sidebar-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 4px 0;
}

.sidebar-link:hover {
  color: var(--color-primary);
}

.quick-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.quick-link-item {
  border-bottom: 1px solid var(--color-border);
}

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

.quick-link {
  display: block;
  padding: 10px 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1.5;
}

.quick-link:hover {
  color: var(--color-accent);
  padding-left: 10px;
}

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

.feature-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}

.feature-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.feature-item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-light);
}

.section-more {
  font-size: 14px;
  color: var(--color-text-light);
}

.section-more a {
  color: var(--color-accent);
  font-weight: 500;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.capability-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.capability-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

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

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 14px 16px 6px;
  line-height: 1.4;
}

.card-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-light);
  padding: 0 16px;
  flex: 1;
}

.card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 10px 16px 14px;
}

.card-link:hover {
  color: var(--color-primary);
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 16px;
}

.step-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.step-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-light);
}

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

.insight-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  transition: box-shadow var(--transition-base);
}

.insight-item:hover {
  box-shadow: var(--shadow-hover);
}

.insight-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(201, 145, 30, 0.1);
  padding: 2px 10px;
  border-radius: 20px;
  margin-bottom: 8px;
}

.insight-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.45;
  margin-bottom: 6px;
}

.insight-summary {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-light);
}

.faq-mini-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  line-height: 1.5;
}

.faq-question::after {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
}

.faq-item[open] .faq-question::after {
  content: '−';
}

.faq-answer {
  padding: 0 18px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
}

.cooperation-guide-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  border-left: 4px solid var(--color-accent);
}

.cooperation-guide-section .section-title {
  margin-bottom: 8px;
}

.cooperation-guide-section .btn {
  margin-top: 8px;
}

/* ============================================================
   pages / inner — 内页通用双栏布局
   ============================================================ */
.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 20px;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-content,
.main-content,
.page-main-content,
.site-main.inner-main {
  min-width: 0;
}

.page-sidebar,
.page-aside,
.sidebar,
.sidebar-content {
  min-width: 0;
}

/* ============================================================
   pages / about — 关于我们
   ============================================================ */
.about-section {
  margin-bottom: 36px;
}

.about-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.about-section p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.philosophy-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.philosophy-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.philosophy-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.sidebar-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}

.sidebar-block h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

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

.gallery-item {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.gallery-item img {
  width: 100%;
  height: 130px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.03);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-item {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.related-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.related-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
}

.related-link:hover {
  color: var(--color-accent);
}

.related-desc {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 4px;
}

/* ============================================================
   pages / capability — 核心能力
   ============================================================ */
.page-heading {
  margin-bottom: 28px;
}

.capability-map {
  margin-bottom: 36px;
}

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

.capability-grid .capability-card {
  padding: 0;
}

.capability-grid .capability-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.capability-grid .capability-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 14px 16px 4px;
  line-height: 1.4;
}

.capability-grid .capability-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-light);
  padding: 0 16px;
  flex: 1;
}

.capability-grid .capability-card a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 10px 16px 14px;
}

.comparison-section {
  margin-bottom: 36px;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 480px;
}

.comparison-table th,
.comparison-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  line-height: 1.6;
}

.comparison-table thead th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  font-size: 15px;
}

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

.comparison-table tbody tr:nth-child(even) {
  background-color: #f8fafc;
}

.target-audience {
  margin-bottom: 24px;
}

.audience-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.audience-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}

.audience-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.audience-item p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-light);
}

.sidebar .sidebar-card {
  margin-bottom: 20px;
}

.choice-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.choice-list li {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
}

.choice-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.choice-list strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.choice-list p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.choice-list a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.sidebar-btn {
  display: block;
  text-align: center;
  margin-top: 4px;
}

/* ============================================================
   pages / method — 服务方法
   ============================================================ */
.method-summary,
.method-audience,
.method-steps,
.delivery-standards {
  margin-bottom: 36px;
}

.method-summary h2,
.method-audience h2,
.method-steps h2,
.delivery-standards h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.method-summary p,
.method-audience p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 12px;
}

.method-audience .audience-item {
  margin-bottom: 10px;
}

.method-audience .audience-item:last-child {
  margin-bottom: 0;
}

.method-steps .steps-list {
  margin-bottom: 20px;
}

.method-steps .step-item {
  text-align: left;
  padding: 20px;
  position: relative;
}

.method-steps .step-number {
  display: inline-flex;
  width: 36px;
  height: 36px;
  font-size: 16px;
  margin-bottom: 10px;
}

.step-content {
  padding-top: 4px;
}

.step-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.step-content p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.method-figure {
  margin: 20px 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
}

.method-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.method-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

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

.standard-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.standard-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.standard-item p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-light);
  margin-bottom: 0;
}

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

.sidebar-link-item {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.sidebar-link-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-link-item a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
}

.sidebar-link-item a:hover {
  color: var(--color-accent);
}

/* ============================================================
   pages / insights — 行业洞察
   ============================================================ */
.insights-intro {
  margin-bottom: 28px;
}

.insights-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.insight-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base);
}

.insight-card:hover {
  box-shadow: var(--shadow-hover);
}

.insight-media {
  overflow: hidden;
}

.insight-media img {
  width: 100%;
  height: 100%;
  min-height: 160px;
  object-fit: cover;
}

.insight-body {
  padding: 18px 20px 18px 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.insight-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(201, 145, 30, 0.1);
  padding: 2px 10px;
  border-radius: 20px;
  margin-bottom: 8px;
}

.insight-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.45;
  margin-bottom: 8px;
}

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

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

.insight-summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 12px;
  flex: 1;
}

.insight-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.insight-categories {
  margin-bottom: 28px;
}

.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.category-tags a {
  display: inline-block;
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.category-tags a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.related-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 16px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

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

.related-links-item {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-light);
}

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

.recommended-reading .sidebar-links li {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 10px;
  margin-bottom: 10px;
}

.recommended-reading .sidebar-links li:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.recommended-reading .sidebar-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1.5;
  display: block;
}

.recommended-reading .sidebar-links a:hover {
  color: var(--color-accent);
}

.capability-guide p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.capability-guide .sidebar-link {
  margin-right: 12px;
}

/* ============================================================
   pages / faq — 常见问题
   ============================================================ */
.faq-group {
  margin-bottom: 32px;
}

.faq-group h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.faq-group .faq-item {
  margin-bottom: 12px;
}

.faq-group .faq-item:last-child {
  margin-bottom: 0;
}

.faq-group .faq-question {
  padding: 16px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-white);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  line-height: 1.5;
}

.faq-group .faq-question::after {
  content: '+';
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
}

.faq-group .faq-item[open] .faq-question::after {
  content: '−';
}

.faq-group .faq-answer {
  padding: 0 18px 18px;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.faq-group .faq-answer p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-light);
  padding-top: 12px;
}

.faq-figure {
  margin: 28px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
}

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

.faq-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.aside-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}

.aside-block h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.aside-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.aside-item {
  border-bottom: 1px solid var(--color-border);
}

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

.aside-link {
  display: block;
  padding: 8px 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1.5;
}

.aside-link:hover {
  color: var(--color-accent);
}

.aside-cta p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 14px;
}

.aside-cta .btn-primary {
  width: 100%;
}

/* ============================================================
   pages / contact — 合作咨询
   ============================================================ */
.page-title-area {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 28px 20px;
}

.page-subtitle {
  max-width: var(--container-width);
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
}

.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 20px;
}

.contact-section {
  margin-bottom: 36px;
}

.contact-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.contact-section > p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: 16px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.process-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.process-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}

.process-step h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
  line-height: 1.4;
}

.process-step p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.check-item::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

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

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.principle-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.principle-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.contact-figure {
  margin: 28px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
}

.contact-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.contact-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.sidebar-module {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}

.sidebar-module h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-module p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.sidebar-module .sidebar-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

/* ============================================================
   pages / 404 — 错误页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 40px 20px;
}

.error-section {
  text-align: center;
  max-width: 520px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 48px 40px;
  box-shadow: var(--shadow-card);
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 12px;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.error-link {
  display: inline-block;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  background-color: var(--color-accent);
  border-radius: var(--radius-md);
  min-height: 44px;
  line-height: 1.5;
}

.error-link:hover {
  background-color: #b07f16;
  color: var(--color-white);
}

/* ============================================================
   responsive — 响应式断点
   ============================================================ */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .content-media img {
    height: 260px;
  }

  .home-layout {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 24px;
  }

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

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

  .insight-card {
    grid-template-columns: 200px 1fr;
  }
}

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 2px;
  }

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

  .nav-link {
    padding: 12px 14px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .nav-link.is-current {
    background-color: rgba(255, 255, 255, 0.12);
  }

  .hero-section {
    padding: 36px 16px 32px;
  }

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

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

  .content-media img {
    height: 200px;
  }

  .home-layout {
    grid-template-columns: 1fr;
    padding: 28px 16px;
    gap: 28px;
  }

  .page-layout {
    grid-template-columns: 1fr;
    padding: 24px 16px;
    gap: 28px;
  }

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

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

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

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

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

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

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

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

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

  .insight-card {
    grid-template-columns: 1fr;
  }

  .insight-media img {
    height: 180px;
    min-height: 0;
  }

  .insight-body {
    padding: 0 18px 18px;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    padding: 24px 16px 12px;
  }

  .footer-links {
    padding-top: 0;
  }

  .footer-bottom {
    padding: 10px 16px;
  }

  .table-wrapper {
    margin: 0 -8px;
    padding: 0 8px;
  }

  .comparison-table {
    font-size: 13px;
    min-width: 420px;
  }

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

  .error-section {
    padding: 32px 24px;
  }

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

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

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

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

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

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

  .section-title {
    font-size: 20px;
  }

  .card-image {
    height: 140px;
  }

  .capability-grid .capability-card img {
    height: 120px;
  }

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

  .gallery-item img {
    height: 160px;
  }

  .method-figure img,
  .faq-figure img,
  .contact-figure img {
    height: 180px;
  }

  .insight-media img {
    height: 160px;
  }

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

  .cooperation-guide-section {
    padding: 20px;
  }

  .sidebar-card {
    padding: 18px;
  }
}