/* ==========================================================================
   yijiazhigou.com - 全站样式表
   设计方向：现代主义海报风 · 深蓝背景 · 高饱和色块 · 严格对齐
   ========================================================================== */

/* ==========================================================================
   Base / 基础样式
   ========================================================================== */
:root {
  --color-deep-blue: #0A1128;
  --color-light-bg: #F4F7FB;
  --color-accent-red: #FF4D4D;
  --color-accent-yellow: #FFD166;
  --color-white: #FFFFFF;
  --color-secondary-blue: #1D3557;
  --color-text-dark: #1A2233;
  --color-text-medium: #4A5568;
  --color-text-light: #8A94A6;
  --color-border: #E2E8F0;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --container-width: 1200px;
  --header-height: 64px;
  --header-height-scrolled: 48px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text-dark);
  background-color: var(--color-light-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

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

/* 视觉隐藏（仅用于屏幕阅读器） */
.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;
}

/* ==========================================================================
   Layout / 布局骨架
   ========================================================================== */

/* 全站容器 */
.header-shell,
.footer-shell,
.home-main > section,
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 内页主容器 */
.inner-main {
  padding-top: 32px;
  padding-bottom: 64px;
  min-height: calc(100vh - var(--header-height) - 60px);
}

/* 内页布局壳（侧栏 + 内容） */
.layout-shell {
  display: block;
}

.sidebar-left {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

/* ==========================================================================
   Header / 页头
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-deep-blue);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  height: var(--header-height);
  transition: height var(--transition-fast);
}

.site-header.is-scrolled {
  height: var(--header-height-scrolled);
}

.header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

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

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

.nav-item {
  display: block;
  padding: 8px 14px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-item:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-item.is-current {
  color: var(--color-white);
  background-color: rgba(255, 77, 77, 0.25);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

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

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

/* ==========================================================================
   Footer / 页脚
   ========================================================================== */
.site-footer {
  background-color: var(--color-deep-blue);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 0;
}

.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 40px;
}

.footer-left {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-brand {
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

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

.footer-nav a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 13px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.06);
}

.footer-compliance {
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
}

/* ==========================================================================
   Components / 公共组件
   ========================================================================== */

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--color-text-light);
}

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

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

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

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

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

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-deep-blue);
  line-height: 1.25;
}

.page-title-block {
  margin-bottom: 40px;
}

.page-intro {
  font-size: 16px;
  color: var(--color-text-medium);
  max-width: 720px;
  line-height: 1.7;
}

/* 区块标记 */
.section-mark {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-red);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

/* CTA 按钮 */
.cta-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-accent-red);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.cta-primary:hover {
  background-color: #e63e3e;
  transform: translateY(-2px);
}

.cta-secondary {
  display: inline-block;
  padding: 12px 28px;
  background-color: transparent;
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.cta-secondary:hover {
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

/* 区块标题 */
.section-heading {
  margin-bottom: 40px;
}

.section-kicker {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-red);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-deep-blue);
  line-height: 1.3;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-medium);
  max-width: 640px;
  margin-top: 12px;
  line-height: 1.6;
}

/* 相关链接 */
.related-links {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 13px;
  color: var(--color-text-light);
}

.related-links-item {
  font-size: 14px;
  color: var(--color-secondary-blue);
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.related-links-item:hover {
  background-color: rgba(29, 53, 87, 0.06);
  color: var(--color-accent-red);
}

/* 图文媒体 */
.content-media {
  margin: 24px 0;
}

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

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

.content-media-inline img {
  border-radius: var(--radius-lg);
}

.content-media-inline figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
}

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

/* --- 首屏服务状态区 --- */
.hero-status {
  background-color: var(--color-deep-blue);
  color: var(--color-white);
  padding: 64px 24px 48px;
  margin-bottom: 64px;
}

.home-main > .hero-status {
  max-width: 100%;
  padding-left: 24px;
  padding-right: 24px;
}

.hero-status .hero-copy {
  max-width: var(--container-width);
  margin: 0 auto;
}

.hero-kicker {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent-yellow);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 640px;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  max-width: var(--container-width);
  margin: 48px auto 0;
  position: relative;
}

.hero-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.status-card {
  position: absolute;
  right: 24px;
  bottom: 24px;
  background-color: var(--color-accent-yellow);
  color: var(--color-deep-blue);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  max-width: 260px;
}

.status-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.status-value {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.status-meta {
  font-size: 13px;
  opacity: 0.8;
}

/* 服务对象索引 */
.service-audience-index {
  max-width: var(--container-width);
  margin: 48px auto 0;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.service-audience-index .section-subtitle {
  color: var(--color-white);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 24px;
}

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

.audience-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  min-height: 120px;
}

.audience-card:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-accent-yellow);
}

.audience-code {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-yellow);
  text-transform: uppercase;
}

.audience-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
}

.audience-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.5;
}

/* --- 服务能力矩阵 --- */
.service-matrix-section {
  padding: 64px 0;
}

.service-matrix-section .section-heading,
.service-matrix-section .section-title,
.service-matrix-section .section-intro {
  color: var(--color-deep-blue);
}

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

.matrix-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 32px;
  border-radius: var(--radius-lg);
  min-height: 220px;
  color: var(--color-white);
  transition: transform var(--transition-fast), box-shadow var(--transition-normal);
}

.matrix-block:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(10, 17, 40, 0.18);
}

.matrix-blue {
  background-color: var(--color-secondary-blue);
}

.matrix-yellow {
  background-color: var(--color-accent-yellow);
  color: var(--color-deep-blue);
}

.matrix-red {
  background-color: var(--color-accent-red);
}

.matrix-dark {
  background-color: var(--color-deep-blue);
}

.matrix-num {
  font-size: 14px;
  font-weight: 700;
  opacity: 0.7;
}

.matrix-name {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
}

.matrix-desc {
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.85;
  flex-grow: 1;
}

.matrix-link {
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  opacity: 0.9;
}

.matrix-block:hover .matrix-link {
  text-decoration: underline;
}

/* --- 价值主张 --- */
.value-section {
  background-color: var(--color-white);
  padding: 64px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
}

.value-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.value-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-deep-blue);
  line-height: 1.4;
}

.value-text {
  font-size: 15px;
  color: var(--color-text-medium);
  line-height: 1.7;
}

.value-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 8px;
}

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

/* --- 合作流程预览 --- */
.process-preview-section {
  padding: 64px 0;
}

.process-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.timeline-item {
  position: relative;
  padding: 24px 16px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline-item:hover {
  border-color: var(--color-accent-red);
  box-shadow: 0 4px 12px rgba(10, 17, 40, 0.06);
}

.timeline-num {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-red);
  background-color: rgba(255, 77, 77, 0.08);
  padding: 2px 10px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.timeline-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-deep-blue);
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 13px;
  color: var(--color-text-medium);
  line-height: 1.5;
}

.process-cta {
  text-align: left;
}

.process-cta .cta-primary {
  background-color: var(--color-deep-blue);
}

.process-cta .cta-primary:hover {
  background-color: var(--color-secondary-blue);
}

/* --- 交付标准说明 --- */
.delivery-section {
  background-color: var(--color-deep-blue);
  padding: 64px 0;
}

.delivery-section .section-heading {
  margin-bottom: 32px;
}

.delivery-section .section-title {
  color: var(--color-white);
}

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

.delivery-card {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.delivery-card:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-accent-yellow);
}

.delivery-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.delivery-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* --- 常见问题入口 --- */
.faq-entry-section {
  padding: 64px 0;
}

.faq-entry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.faq-entry-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-entry-card:hover {
  border-color: var(--color-accent-red);
  box-shadow: 0 4px 12px rgba(10, 17, 40, 0.06);
}

.faq-entry-q {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-deep-blue);
  line-height: 1.5;
}

.faq-entry-a {
  font-size: 14px;
  color: var(--color-text-medium);
  line-height: 1.6;
}

.faq-more-link {
  text-align: left;
}

.faq-more-link .cta-secondary {
  color: var(--color-deep-blue);
  border-color: var(--color-deep-blue);
}

.faq-more-link .cta-secondary:hover {
  background-color: var(--color-deep-blue);
  color: var(--color-white);
}

/* ==========================================================================
   Pages / 品牌理念 (about)
   ========================================================================== */

.brand-position {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.position-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.position-copy h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-deep-blue);
  line-height: 1.4;
}

.position-copy p {
  font-size: 15px;
  color: var(--color-text-medium);
  line-height: 1.75;
}

.position-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.position-figure figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
}

/* 服务原则 */
.principles-section {
  margin-bottom: 80px;
}

.principles-section h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 12px;
}

.principles-lead {
  font-size: 15px;
  color: var(--color-text-medium);
  max-width: 640px;
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.principle-card:hover {
  border-color: var(--color-accent-red);
  box-shadow: 0 4px 12px rgba(10, 17, 40, 0.06);
}

.principle-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-deep-blue);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent-yellow);
  display: inline-block;
}

.principle-card p {
  font-size: 14px;
  color: var(--color-text-medium);
  line-height: 1.7;
}

/* 工作方式 */
.work-style {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.work-style-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.work-style-text h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-deep-blue);
  line-height: 1.4;
}

.work-style-text p {
  font-size: 15px;
  color: var(--color-text-medium);
  line-height: 1.75;
}

.work-style-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

/* 页面底部链接 */
.about-links {
  margin-bottom: 32px;
}

.about-links h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 20px;
}

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

.link-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.link-card:hover {
  border-color: var(--color-accent-red);
  box-shadow: 0 4px 12px rgba(10, 17, 40, 0.06);
}

.link-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-deep-blue);
}

.link-card-desc {
  font-size: 13px;
  color: var(--color-text-medium);
  line-height: 1.5;
}

/* ==========================================================================
   Pages / 服务能力 (services)
   ========================================================================== */

/* 侧边栏 */
.page-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.service-index {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.service-index-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.service-index-item:hover {
  border-color: var(--color-accent-red);
  background-color: rgba(255, 77, 77, 0.04);
}

.index-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-red);
}

.index-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-deep-blue);
}

.sidebar-note {
  background-color: var(--color-deep-blue);
  border-radius: var(--radius-md);
  padding: 16px;
}

.sidebar-note p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.6;
}

/* 服务详情块 */
.service-detail-block {
  margin-bottom: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

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

.service-detail-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.service-detail-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  background-color: var(--color-accent-red);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}

.service-detail-head h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-deep-blue);
}

.service-detail-body {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.service-context h3,
.service-process h3,
.service-output h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-secondary-blue);
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-accent-yellow);
}

.service-context p {
  font-size: 15px;
  color: var(--color-text-medium);
  line-height: 1.7;
  padding-left: 12px;
}

.process-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 12px;
}

.process-list li {
  font-size: 14px;
  color: var(--color-text-medium);
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.process-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent-red);
  border-radius: 50%;
}

.output-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 12px;
}

.output-list li {
  font-size: 14px;
  color: var(--color-text-medium);
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.output-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent-red);
  font-weight: 700;
}

/* 场景速配表 */
.match-table-block {
  margin-top: 56px;
  margin-bottom: 56px;
}

.match-table-block h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 12px;
}

.block-desc {
  font-size: 15px;
  color: var(--color-text-medium);
  margin-bottom: 24px;
  line-height: 1.6;
}

.table-wrap {
  overflow-x: auto;
}

.match-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.match-table th,
.match-table td {
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--color-border);
}

.match-table th {
  background-color: var(--color-deep-blue);
  color: var(--color-white);
  font-weight: 600;
  white-space: nowrap;
}

.match-table td {
  color: var(--color-text-medium);
  line-height: 1.6;
}

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

.match-table tbody tr:hover {
  background-color: rgba(255, 209, 102, 0.08);
}

/* 服务配图 */
.service-image-block {
  margin-bottom: 56px;
}

.service-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.service-figure figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
}

/* 下一步 */
.next-step-block {
  margin-top: 56px;
}

.next-step-block h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 24px;
}

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

.next-step-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.next-step-card:hover {
  border-color: var(--color-accent-red);
  box-shadow: 0 4px 12px rgba(10, 17, 40, 0.06);
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-deep-blue);
}

.card-desc {
  font-size: 13px;
  color: var(--color-text-medium);
  line-height: 1.5;
}

/* ==========================================================================
   Pages / 合作流程 (process)
   ========================================================================== */

/* 流程索引 */
.process-index {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.index-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent-yellow);
}

.index-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.index-list li a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--color-text-medium);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.index-list li a:hover {
  background-color: rgba(255, 77, 77, 0.06);
  color: var(--color-accent-red);
}

.index-note {
  margin-top: 24px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.index-note p {
  font-size: 13px;
  color: var(--color-text-medium);
  line-height: 1.6;
  margin-bottom: 12px;
}

.index-note a {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent-red);
}

.index-note a:hover {
  text-decoration: underline;
}

/* 流程正文 */
.process-content {
  min-width: 0;
}

.process-steps {
  margin-bottom: 56px;
}

.process-steps .section-title {
  margin-bottom: 32px;
}

.stage-block {
  margin-bottom: 40px;
  padding: 28px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.stage-block:hover {
  border-color: var(--color-accent-yellow);
  box-shadow: 0 4px 12px rgba(10, 17, 40, 0.04);
}

.stage-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-accent-yellow);
}

.stage-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  background-color: var(--color-deep-blue);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}

.stage-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-deep-blue);
}

.stage-detail {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stage-goal,
.stage-actions,
.stage-deliverable,
.stage-client {
  font-size: 14px;
  color: var(--color-text-medium);
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
}

.stage-goal::before {
  content: "目标";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-red);
}

.stage-actions::before {
  content: "动作";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-red);
}

.stage-deliverable::before {
  content: "交付";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-red);
}

.stage-client::before {
  content: "配合";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-red);
}

/* 准备清单 */
.checklist-section {
  margin-bottom: 48px;
}

.checklist-section .section-title {
  margin-bottom: 12px;
}

.checklist-intro {
  font-size: 15px;
  color: var(--color-text-medium);
  margin-bottom: 24px;
  line-height: 1.6;
}

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

.checklist-items li {
  font-size: 14px;
  color: var(--color-text-medium);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  line-height: 1.6;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.checklist-items li::before {
  content: "□";
  color: var(--color-accent-red);
  font-weight: 700;
  flex-shrink: 0;
}

/* 流程图 */
.process-figure {
  margin-top: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.process-figure figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
}

/* ==========================================================================
   Pages / 常见问题 (faq)
   ========================================================================== */

.page-intro .page-desc {
  font-size: 16px;
  color: var(--color-text-medium);
  max-width: 720px;
  line-height: 1.7;
}

/* 分类导航 */
.faq-category-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 32px 0 48px;
  padding: 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.faq-category-nav .content-media {
  margin: 0;
  margin-right: 8px;
}

.faq-category-nav .content-media img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.faq-category-nav .content-media figcaption {
  display: none;
}

.cat-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-medium);
  background-color: var(--color-light-bg);
  border-radius: 20px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.cat-link:hover {
  background-color: var(--color-deep-blue);
  color: var(--color-white);
}

/* FAQ 分组 */
.faq-group {
  margin-bottom: 48px;
}

.faq-group h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent-yellow);
  display: inline-block;
}

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

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

.faq-item summary {
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-deep-blue);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--transition-fast);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent-red);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

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

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

.faq-answer {
  padding: 0 20px 20px;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  margin-top: 0;
}

.faq-answer p {
  font-size: 14px;
  color: var(--color-text-medium);
  line-height: 1.7;
}

/* 下一步指引 */
.next-step {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.next-step .next-step-card {
  background-color: var(--color-deep-blue);
  border: none;
  border-radius: var(--radius-md);
  padding: 28px;
  transition: background-color var(--transition-fast);
}

.next-step .next-step-card:hover {
  background-color: var(--color-secondary-blue);
}

.next-step .next-step-card h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 8px;
}

.next-step .next-step-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
  margin-bottom: 16px;
}

.next-step .next-step-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent-yellow);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.next-step .next-step-card a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Pages / 内容档案 (archive)
   ========================================================================== */

.archive-hero {
  background-color: var(--color-deep-blue);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin-bottom: 48px;
}

.archive-hero-inner {
  max-width: 720px;
}

.archive-lead {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
}

.archive-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  align-items: start;
}

.archive-index {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.archive-index h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent-yellow);
}

.term-group-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.term-group-list li a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--color-text-medium);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.term-group-list li a:hover {
  background-color: rgba(255, 77, 77, 0.06);
  color: var(--color-accent-red);
}

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

.term-section {
  margin-bottom: 56px;
}

.term-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent-yellow);
  display: inline-block;
}

.term-section .content-media {
  margin: 0 0 24px;
}

.term-section .content-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.term-section .content-media figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
}

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

.term-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.term-card:hover {
  border-color: var(--color-accent-yellow);
  box-shadow: 0 4px 12px rgba(10, 17, 40, 0.04);
}

.term-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-deep-blue);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.term-card p {
  font-size: 13px;
  color: var(--color-text-medium);
  line-height: 1.6;
}

.term-card .term-scene {
  font-size: 13px;
  color: var(--color-secondary-blue);
  line-height: 1.6;
}

.term-card .term-related {
  font-size: 12px;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* 相关入口 */
.archive-related {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.archive-related h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 20px;
}

.related-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background-color: var(--color-deep-blue);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.related-card:hover {
  background-color: var(--color-secondary-blue);
}

.related-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
}

.related-card p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* ==========================================================================
   Pages / 404
   ========================================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - 60px);
  padding: 48px 24px;
}

.error-panel {
  text-align: center;
  max-width: 520px;
}

.error-code {
  font-size: 72px;
  font-weight: 800;
  color: var(--color-accent-red);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 16px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-medium);
  line-height: 1.7;
  margin-bottom: 32px;
}

.error-back {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-deep-blue);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.error-back:hover {
  background-color: var(--color-secondary-blue);
}

/* ==========================================================================
   Responsive / 响应式
   ========================================================================== */

/* 平板及以下 */
@media (max-width: 1024px) {
  .sidebar-left {
    grid-template-columns: 200px 1fr;
    gap: 32px;
  }

  .archive-layout {
    grid-template-columns: 180px 1fr;
    gap: 32px;
  }

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

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

/* 移动端 */
@media (max-width: 768px) {
  .header-shell,
  .footer-shell,
  .home-main > section,
  .inner-main {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  /* 页头 */
  .site-header {
    height: 56px;
  }

  .site-header.is-scrolled {
    height: 48px;
  }

  .brand-name {
    font-size: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-deep-blue);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0 16px;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
  }

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

  .nav-item {
    padding: 14px 12px;
    border-radius: var(--radius-sm);
    font-size: 15px;
  }

  /* 页脚 */
  .footer-shell {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .footer-right {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .footer-nav {
    flex-wrap: wrap;
  }

  /* 首页 */
  .hero-status {
    padding: 40px 16px 32px;
    margin-bottom: 48px;
  }

  .hero-title {
    font-size: 30px;
  }

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

  .hero-figure img {
    height: 200px;
  }

  .status-card {
    position: static;
    margin-top: 16px;
    max-width: 100%;
  }

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

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

  .matrix-block {
    min-height: 160px;
    padding: 24px;
  }

  .value-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .value-figure img {
    height: 180px;
  }

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

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

  .faq-entry-grid {
    grid-template-columns: 1fr;
  }

  /* 内页通用 */
  .page-title {
    font-size: 26px;
  }

  .page-title-block {
    margin-bottom: 32px;
  }

  .section-title {
    font-size: 22px;
  }

  /* 侧栏布局 */
  .sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-sidebar,
  .process-index {
    position: static;
  }

  .service-index {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .service-index-item {
    flex-shrink: 0;
  }

  .sidebar-note {
    display: none;
  }

  .index-list {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .index-list li {
    flex-shrink: 0;
  }

  .index-note {
    display: none;
  }

  /* about */
  .brand-position {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 56px;
  }

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

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

  .work-style {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 56px;
  }

  .work-style-figure img {
    height: 220px;
  }

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

  /* services */
  .service-detail-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .service-detail-head h2 {
    font-size: 20px;
  }

  .service-detail-body {
    gap: 20px;
  }

  .process-list,
  .output-list {
    padding-left: 0;
  }

  .service-context p {
    padding-left: 0;
  }

  .service-context h3,
  .service-process h3,
  .service-output h3 {
    padding-left: 0;
    border-left: none;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-accent-yellow);
    display: inline-block;
  }

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

  .match-table {
    min-width: 560px;
  }

  .service-figure img {
    height: 200px;
  }

  /* process */
  .stage-block {
    padding: 20px;
  }

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

  .stage-name {
    font-size: 18px;
  }

  .stage-goal,
  .stage-actions,
  .stage-deliverable,
  .stage-client {
    padding-left: 0;
    padding-top: 20px;
  }

  .stage-goal::before,
  .stage-actions::before,
  .stage-deliverable::before,
  .stage-client::before {
    top: 0;
  }

  .checklist-items {
    grid-template-columns: 1fr;
  }

  .process-figure img {
    height: 200px;
  }

  /* faq */
  .faq-category-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 12px;
    gap: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .faq-category-nav .content-media {
    display: none;
  }

  .cat-link {
    flex-shrink: 0;
    white-space: nowrap;
  }

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

  .faq-answer {
    padding: 0 16px 16px;
  }

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

  /* archive */
  .archive-hero {
    padding: 32px 24px;
  }

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

  .archive-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .archive-index {
    position: static;
  }

  .term-group-list {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .term-group-list li {
    flex-shrink: 0;
  }

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

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

  .term-section .content-media img {
    height: 160px;
  }

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

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

/* 小屏手机 */
@media (max-width: 480px) {
  .hero-title {
    font-size: 26px;
  }

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

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

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

  .faq-more-link .cta-secondary {
    width: 100%;
    text-align: center;
  }
}

/* ==========================================================================
   动效增强（不影响初始可见性）
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  .home-main section,
  .inner-main section {
    animation: fadeInUp 0.6s ease both;
  }

  .home-main section:nth-child(2),
  .inner-main section:nth-child(2) {
    animation-delay: 0.1s;
  }

  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(16px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* 滚动时区块淡入（由 JS 添加 .is-visible） */
@media (prefers-reduced-motion: no-preference) {
  .home-main section,
  .inner-main section {
    opacity: 1;
    transform: none;
  }
}