/* ==========================================================================
   51黑料网 · 全站样式表
   工艺品牌风：暖木色 + 理性灰蓝，信息核查工作台隐喻
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Base —— 重置、变量、全局基础
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #A66B42;
  --color-secondary: #3A546D;
  --color-bg: #F7F4EF;
  --color-text: #2B2B2B;
  --color-accent: #C4492B;
  --color-white: #FFFFFF;
  --color-border: #E2DCD3;
  --color-light: #EFEAE3;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --container-max: 1200px;
  --content-max: 960px;
  --sidebar-width: 220px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --shadow-sm: 0 1px 3px rgba(43, 43, 43, 0.08);
  --shadow-md: 0 4px 12px rgba(43, 43, 43, 0.08);
}

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

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

body {
  font-family: var(--font-sans);
  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-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.3;
  color: var(--color-text);
  font-weight: 600;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 1em;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 14px;
  color: #6B6B6B;
  text-align: center;
  margin-top: 8px;
  line-height: 1.5;
}

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

/* --------------------------------------------------------------------------
   2. Layout —— 全站容器、页头、页脚、面包屑、页面标题
   -------------------------------------------------------------------------- */

.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
}

.brand-tagline {
  font-size: 12px;
  color: var(--color-secondary);
  letter-spacing: 1px;
}

.site-nav .nav-list {
  display: flex;
  gap: 8px;
}

.site-nav .nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s, color 0.2s;
}

.site-nav .nav-list a:hover {
  background-color: var(--color-light);
  color: var(--color-primary);
}

.site-nav .nav-list a.is-current {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

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

.site-main.inner-main {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.breadcrumb {
  padding: 24px 0 8px;
  font-size: 14px;
  color: #6B6B6B;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: #A0A0A0;
}

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

.page-header {
  padding: 16px 0 32px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.page-header .page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-header .page-description {
  font-size: 16px;
  color: #5A5A5A;
  max-width: 720px;
  margin-bottom: 0;
}

/* 内页布局：侧栏 + 主内容 */
.page-layout.sidebar-left,
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding-bottom: 64px;
}

.sidebar,
.sidebar-tree {
  position: sticky;
  top: 96px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 0;
}

.sidebar-title,
.tree-title {
  font-size: 16px;
  font-weight: 600;
  padding: 0 24px 16px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
  color: var(--color-primary);
}

.sidebar-list,
.tree-list {
  padding: 0 16px;
}

.sidebar-list li,
.tree-list li {
  margin-bottom: 4px;
}

.sidebar-list a,
.tree-list a {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s, color 0.2s;
}

.sidebar-list a:hover,
.tree-list a:hover {
  background-color: var(--color-light);
  color: var(--color-primary);
}

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

/* 页脚 */
.site-footer {
  background-color: #2B2B2B;
  color: #C8C8C8;
  padding: 56px 0 32px;
  margin-top: 40px;
}

.footer-columns {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 48px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.footer-brand strong {
  color: var(--color-white);
  font-weight: 600;
}

.footer-brand .copyright {
  color: #8A8A8A;
  font-size: 13px;
  margin-top: 16px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-links ul li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #C8C8C8;
  font-size: 14px;
}

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

.footer-legal p {
  font-size: 13px;
  line-height: 1.6;
  color: #8A8A8A;
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   3. Components —— 按钮、卡片、FAQ、步骤条、图文块等
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
  min-height: 44px;
}

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

.btn-primary:hover {
  background-color: #8F5A36;
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.btn-secondary:hover {
  background-color: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
}

.btn-text::after {
  content: "→";
  font-size: 18px;
  transition: transform 0.2s;
}

.btn-text:hover::after {
  transform: translateX(4px);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-secondary);
  border: 1px solid var(--color-secondary);
  border-radius: var(--radius-md);
  min-height: 44px;
  transition: background-color 0.2s, color 0.2s;
}

.btn-link:hover {
  background-color: var(--color-secondary);
  color: var(--color-white);
}

/* FAQ 折叠面板 */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  position: relative;
  padding-right: 48px;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: var(--color-primary);
  font-weight: 400;
  transition: transform 0.2s;
}

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

.faq-item p {
  padding: 0 24px 16px;
  font-size: 15px;
  color: #4A4A4A;
  margin-bottom: 0;
}

.faq-item a {
  display: inline-block;
  margin: 0 24px 20px;
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
}

/* 编号标签 */
.service-code,
.quality-code,
.step-number,
.step-num,
.step-badge,
.section-number {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-primary);
}

/* 滚动进入视口动画（增强，不影响初始可见性） */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   4. Pages —— 首页各模块
   -------------------------------------------------------------------------- */

/* 首屏 */
.hero-section {
  background-color: var(--color-bg);
  padding: 72px 24px 64px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: var(--container-max);
  margin: 0 auto;
}

.hero-content {
  padding: 24px 0;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-lead {
  font-size: 18px;
  color: #4A4A4A;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 280px;
}

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

.hero-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-figure img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* 品牌摘要 */
.brand-summary {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.summary-text h2 {
  margin-bottom: 16px;
  color: var(--color-text);
}

.summary-text p {
  color: #4A4A4A;
  margin-bottom: 16px;
}

.summary-text a {
  font-weight: 500;
}

.summary-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

/* 服务矩阵 */
.services-matrix {
  background-color: var(--color-white);
  padding: 64px 24px;
}

.services-matrix > h2 {
  max-width: var(--container-max);
  margin: 0 auto 40px;
}

.matrix-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-card .service-code {
  display: block;
  font-size: 14px;
  margin-bottom: 12px;
}

.service-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: #4A4A4A;
  margin-bottom: 20px;
}

.service-card a {
  font-size: 14px;
  font-weight: 500;
}

/* 服务场景 */
.service-scenarios {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 64px 24px;
}

.service-scenarios .section-title {
  margin-bottom: 40px;
}

.scenario-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 64px;
}

.scenario-block.reversed {
  direction: rtl;
}

.scenario-block.reversed > * {
  direction: ltr;
}

.scenario-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.scenario-figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.scenario-text h3 {
  font-size: 20px;
  margin-bottom: 16px;
}

.scenario-text p {
  color: #4A4A4A;
  margin-bottom: 20px;
}

.scenario-text a {
  font-weight: 500;
}

/* 工作流程预览 */
.process-preview {
  background-color: var(--color-white);
  padding: 64px 24px;
}

.process-preview > h2 {
  max-width: var(--container-max);
  margin: 0 auto 40px;
}

.steps-wrapper {
  max-width: var(--container-max);
  margin: 0 auto 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-item {
  padding: 24px;
  border-left: 3px solid var(--color-primary);
  background-color: var(--color-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.step-item .step-number {
  display: block;
  font-size: 14px;
  margin-bottom: 8px;
}

.step-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: #4A4A4A;
  margin-bottom: 0;
}

.process-preview .btn-text {
  display: block;
  max-width: var(--container-max);
  margin: 0 auto;
}

/* 质量标准摘要 */
.quality-summary {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 64px 24px;
}

.quality-summary > h2 {
  margin-bottom: 40px;
}

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

.quality-list li {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.quality-list strong {
  display: block;
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-secondary);
}

.quality-list li::before {
  content: "";
  display: block;
  width: 32px;
  height: 3px;
  background-color: var(--color-primary);
  margin: 0 auto 16px;
  border-radius: 2px;
}

.quality-summary > a {
  display: inline-block;
  margin-top: 24px;
  font-weight: 500;
}

/* 常见问题精选 */
.faq-preview {
  background-color: var(--color-white);
  padding: 64px 24px;
}

.faq-preview > h2 {
  max-width: var(--container-max);
  margin: 0 auto 32px;
}

.faq-preview .faq-item {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
}

/* 合作咨询说明 */
.contact-path {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 64px 24px;
  text-align: center;
}

.contact-path h2 {
  margin-bottom: 16px;
}

.contact-path p {
  color: #4A4A4A;
  max-width: 560px;
  margin: 0 auto 32px;
}

.contact-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   5. Pages —— 内页各模块
   -------------------------------------------------------------------------- */

/* 服务项目页 */
.service-overview {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 40px;
}

.service-overview h2 {
  margin-bottom: 16px;
}

.service-overview > p {
  color: #4A4A4A;
  margin-bottom: 24px;
}

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

.service-overview-list li {
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}

.service-detail-reverse {
  direction: rtl;
}

.service-detail-reverse > * {
  direction: ltr;
}

.service-code-label {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.service-detail-text h2 {
  margin-bottom: 16px;
}

.service-detail-text > p {
  color: #4A4A4A;
  font-size: 15px;
}

.service-detail-text h3 {
  margin: 24px 0 12px;
  font-size: 16px;
}

.service-detail-text ul {
  margin-bottom: 16px;
}

.service-detail-text ul li {
  padding-left: 20px;
  position: relative;
  font-size: 14px;
  color: #4A4A4A;
  margin-bottom: 8px;
}

.service-detail-text ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
}

.service-detail-text > p:last-of-type a {
  font-weight: 500;
}

.service-detail-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.service-detail-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.service-detail-media figcaption {
  padding: 8px 16px 16px;
  background-color: var(--color-white);
}

/* 工作流程页 */
.process-steps-overview {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 40px;
}

.process-steps-overview .section-title {
  margin-bottom: 24px;
}

.steps-preview {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.steps-preview .step-item {
  text-align: center;
  padding: 16px 8px;
  background-color: var(--color-bg);
  border-left: none;
  border-radius: var(--radius-md);
}

.steps-preview .step-num {
  display: block;
  font-size: 20px;
  margin-bottom: 4px;
}

.steps-preview .step-label {
  font-size: 13px;
  color: #4A4A4A;
}

.process-step-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.step-badge {
  font-size: 14px;
  background-color: var(--color-light);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.step-title {
  font-size: 20px;
  margin: 0;
}

.step-detail p {
  font-size: 15px;
  color: #4A4A4A;
  margin-bottom: 12px;
}

.step-detail strong {
  color: var(--color-text);
  font-weight: 600;
}

.process-media {
  margin-top: 24px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.process-media figcaption {
  background-color: var(--color-bg);
  padding: 8px 16px 12px;
}

.deliverables {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 32px;
}

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

.deliverable-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
  color: #4A4A4A;
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.deliverable-list li:last-child {
  border-bottom: none;
}

.deliverable-list strong {
  color: var(--color-text);
  min-width: 96px;
  font-size: 14px;
}

.deliverable-note {
  font-size: 14px;
  color: #6B6B6B;
  margin-top: 16px;
  padding: 12px 16px;
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
}

.related-links {
  margin-top: 32px;
  padding: 24px;
  background-color: var(--color-light);
  border-radius: var(--radius-md);
}

.related-links p {
  margin-bottom: 0;
  font-size: 14px;
}

.related-links a {
  font-weight: 500;
  margin-right: 16px;
}

/* 质量标准页 */
.quality-overview {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 40px;
}

.quality-overview h2 {
  margin-bottom: 16px;
}

.quality-overview > p {
  color: #4A4A4A;
  margin-bottom: 24px;
}

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

.overview-item {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 24px;
}

.overview-item .quality-code {
  display: block;
  font-size: 14px;
  margin-bottom: 8px;
}

.overview-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.overview-item p {
  font-size: 14px;
  color: #4A4A4A;
  margin-bottom: 0;
}

.quality-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
}

.quality-block h2 {
  margin-bottom: 16px;
}

.quality-block > p {
  color: #4A4A4A;
  margin-bottom: 24px;
}

.quality-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 24px;
}

.quality-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.quality-figure figcaption {
  background-color: var(--color-bg);
  padding: 8px 16px 12px;
}

.standard-list {
  margin-bottom: 24px;
}

.standard-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
  color: #4A4A4A;
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.standard-list li:last-child {
  border-bottom: none;
}

.standard-list strong {
  color: var(--color-text);
  min-width: 96px;
  font-size: 14px;
}

.quality-block > p:last-child a {
  font-weight: 500;
}

/* 常见问题页 */
.faq-category {
  margin-bottom: 40px;
}

.faq-cat-title {
  font-size: 20px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.faq-media-note {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 40px;
}

.faq-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.faq-note-title {
  font-size: 18px;
  margin-bottom: 16px;
}

.faq-note-text p {
  font-size: 15px;
  color: #4A4A4A;
  margin-bottom: 16px;
}

.faq-note-text a {
  font-weight: 500;
}

.faq-consult-entry {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  text-align: center;
}

.consult-title {
  margin-bottom: 12px;
}

.faq-consult-entry > p {
  color: #4A4A4A;
  margin-bottom: 24px;
}

.consult-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 关于我们页 */
.about-section {
  margin-bottom: 56px;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.section-number {
  font-size: 20px;
  background-color: var(--color-light);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.section-heading h2 {
  margin: 0;
}

.about-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.about-block-reverse {
  direction: rtl;
}

.about-block-reverse > * {
  direction: ltr;
}

.about-text p {
  color: #4A4A4A;
  font-size: 15px;
}

.about-figure {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.about-figure figcaption {
  background-color: var(--color-white);
  padding: 8px 16px 12px;
}

.methodology-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

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

.method-card h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--color-secondary);
}

.method-card p {
  font-size: 14px;
  color: #4A4A4A;
  margin-bottom: 0;
}

.method-note {
  font-size: 15px;
  color: #4A4A4A;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  border-left: 3px solid var(--color-primary);
}

.method-note a {
  font-weight: 500;
  margin-right: 16px;
}

/* 404 页 */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 64px 24px;
}

.error-panel {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 24px;
  margin-bottom: 16px;
}

.error-desc {
  color: #4A4A4A;
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   6. Responsive —— 响应式断点
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .matrix-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

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

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

  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: auto;
    min-height: 64px;
    padding: 8px 16px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
    order: 3;
  }

  .site-nav {
    order: 4;
    flex-basis: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 8px 0 16px;
    gap: 4px;
  }

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

  .site-nav .nav-list a {
    padding: 12px 16px;
  }

  .hero-section {
    grid-template-columns: 1fr;
    padding: 40px 16px;
    gap: 24px;
  }

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

  .hero-figure img {
    height: 240px;
  }

  .brand-summary {
    grid-template-columns: 1fr;
    padding: 40px 16px;
    gap: 24px;
  }

  .summary-figure img {
    height: 220px;
  }

  .services-matrix {
    padding: 40px 16px;
  }

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

  .service-scenarios {
    padding: 40px 16px;
  }

  .scenario-block {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .scenario-block.reversed {
    direction: ltr;
  }

  .scenario-figure img {
    height: 220px;
  }

  .process-preview {
    padding: 40px 16px;
  }

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

  .quality-summary {
    padding: 40px 16px;
  }

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

  .faq-preview {
    padding: 40px 16px;
  }

  .contact-path {
    padding: 40px 16px;
  }

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

  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .sidebar,
  .sidebar-tree {
    position: static;
    order: 2;
    margin-top: 32px;
  }

  .content-area,
  .page-content,
  .main-content {
    order: 1;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 0 16px;
  }

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

  .service-detail {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .service-detail-reverse {
    direction: ltr;
  }

  .service-detail-media img {
    height: 200px;
  }

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

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

  .faq-media-note {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-block {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-block-reverse {
    direction: ltr;
  }

  .about-figure img {
    height: 220px;
  }

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

  .deliverable-list li {
    flex-direction: column;
    gap: 4px;
  }

  .standard-list li {
    flex-direction: column;
    gap: 4px;
  }

  .consult-links {
    flex-direction: column;
    align-items: center;
  }

  .error-actions {
    flex-direction: column;
    align-items: center;
  }

  .related-links a {
    display: inline-block;
    margin-bottom: 8px;
  }

  .method-note a {
    display: inline-block;
    margin-bottom: 8px;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 18px;
  }

  .brand-tagline {
    font-size: 11px;
  }

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

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

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

  .btn {
    width: 100%;
    padding: 12px 20px;
  }

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

  .page-header .page-description {
    font-size: 15px;
  }

  .breadcrumb {
    font-size: 13px;
  }

  .service-card {
    padding: 24px 16px;
  }

  .step-item {
    padding: 16px;
  }

  .quality-list li {
    padding: 20px 16px;
  }

  .process-step-block,
  .quality-block,
  .service-overview,
  .deliverables,
  .faq-media-note,
  .faq-consult-entry {
    padding: 24px 16px;
  }

  .step-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .section-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .footer-columns {
    gap: 24px;
  }
}