/* ==========================================================================
   yunxihuagong.cn · 小孩动画片 整站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   Base
   ========================================================================== */

:root {
  --color-text: #1F2A37;
  --color-text-secondary: #5A6B7A;
  --color-bg: #FFFFFF;
  --color-surface: #F2F5F7;
  --color-border: #DCE3E8;
  --color-accent: #2F6E74;
  --color-accent-dark: #24585D;
  --color-accent-light: #E8F0F1;
  --color-gold: #C9A063;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1140px;
  --radius: 6px;
  --radius-lg: 8px;
}

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

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

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

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

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

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

ul,
ol {
  list-style: none;
}

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

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

.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
   ========================================================================== */

.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  z-index: 100;
}

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

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.brand-tag {
  font-size: 12px;
  color: var(--color-text-secondary);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius);
  line-height: 1.4;
}

.nav-list li a:hover {
  background: var(--color-surface);
  color: var(--color-accent);
}

.nav-list li a.is-current {
  color: var(--color-accent);
  background: var(--color-accent-light);
  font-weight: 600;
}

.header-cta {
  display: inline-block;
  margin-left: 12px;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-bg);
  background: var(--color-accent);
  border-radius: var(--radius);
  line-height: 1.5;
  white-space: nowrap;
  transition: background 0.2s ease;
}

.header-cta:hover {
  background: var(--color-accent-dark);
  color: var(--color-bg);
}

.header-cta.is-current {
  background: var(--color-accent-dark);
  color: var(--color-bg);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

.nav-toggle-icon {
  display: block;
  position: relative;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: background 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.2s ease;
}

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

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

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

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

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 0;
}

.footer-cta {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 8px;
  text-align: center;
}

.btn-footer {
  display: inline-block;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-bg);
  background: var(--color-accent);
  border-radius: var(--radius);
  line-height: 1.5;
  transition: background 0.2s ease;
}

.btn-footer:hover {
  background: var(--color-accent-dark);
  color: var(--color-bg);
}

.footer-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.footer-nav h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.footer-nav ul li a {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* 内页共用骨架 */

.inner-main {
  padding-bottom: 64px;
}

.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

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

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

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

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

.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 28px 24px 24px;
}

.page-header .page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.page-header .page-description {
  margin-top: 12px;
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 720px;
  line-height: 1.75;
}

/* ==========================================================================
   Components
   ========================================================================== */

.section-block {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-top: 8px;
  max-width: 720px;
}

.section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  line-height: 1.5;
  transition: background 0.2s ease, color 0.2s ease;
}

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

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: var(--color-bg);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn-secondary:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

.btn-related {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 10px 24px;
  font-size: 14px;
}

.btn-related:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

/* 表格 */

.table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.service-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.service-table th,
.service-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.service-table thead th {
  background: var(--color-surface);
  font-weight: 600;
  color: var(--color-text);
  font-size: 14px;
  white-space: nowrap;
}

.service-table tbody tr:last-child td {
  border-bottom: 0;
}

.service-table tbody tr:hover {
  background: var(--color-surface);
}

/* FAQ 折叠 */

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  background: var(--color-bg);
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  line-height: 1.5;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.faq-item p a {
  font-weight: 500;
}

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

.home-main .section-block:first-of-type {
  padding-top: 0;
}

/* 首屏 */

.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px 64px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
  max-width: 520px;
}

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

.hero-media {
  position: relative;
}

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

.hero-figure img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

/* 服务方向目录表 */

.service-directory h2 {
  font-size: 26px;
  font-weight: 700;
}

/* 工作方法三段式 */

.method-summary {
  background: var(--color-surface);
}

.method-summary > .section-block {
  padding-bottom: 40px;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.method-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.method-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 12px rgba(31, 42, 55, 0.06);
}

.method-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.method-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

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

.method-figure {
  margin-top: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
}

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

/* 适用对象与场景入口 */

.audience-scenarios h2 {
  font-size: 26px;
  font-weight: 700;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.scenario-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.scenario-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 12px rgba(31, 42, 55, 0.06);
}

.scenario-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.scenario-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.scenario-item a {
  font-size: 14px;
  font-weight: 500;
}

/* 合作流程时间线 */

.cooperation-timeline h2 {
  font-size: 26px;
  font-weight: 700;
}

.timeline-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 32px;
  position: relative;
}

.timeline-step {
  position: relative;
  padding-top: 32px;
}

.timeline-step::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-border);
}

.timeline-step::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 0;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.timeline-step p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 资料中心入口条 */

.resources-entry {
  background: var(--color-surface);
}

.resources-entry h2 {
  font-size: 26px;
  font-weight: 700;
}

.resources-entry p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-top: 8px;
  max-width: 640px;
}

.resources-entry .btn-primary {
  margin-top: 24px;
}

/* FAQ 预览 */

.faq-preview h2 {
  font-size: 26px;
  font-weight: 700;
}

.faq-preview .faq-item {
  margin-top: 16px;
}

.faq-more-link {
  margin-top: 20px;
  font-size: 15px;
}

/* ==========================================================================
   Pages · 服务总览
   ========================================================================== */

.service-intro h2,
.service-directory h2,
.service-details h2,
.related-links h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.intro-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.intro-copy p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 14px;
}

.intro-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

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

.intro-media figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.service-details {
  border-top: 1px solid var(--color-border);
}

.service-item {
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.service-item:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.service-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.service-item p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 10px;
}

.link-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 24px;
}

.link-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s ease;
}

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

.link-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.link-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

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

/* ==========================================================================
   Pages · 内容方法
   ========================================================================== */

.method-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.method-overview-text h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.method-overview-text p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.method-overview-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.method-overview-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.page-layout.sidebar-left {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

.method-sidebar {
  position: sticky;
  top: 24px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

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

.sidebar-list li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
  border-radius: var(--radius);
  line-height: 1.5;
  border-left: 2px solid transparent;
}

.sidebar-list li a:hover {
  background: var(--color-surface);
  color: var(--color-accent);
}

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

.method-step-list {
  margin-bottom: 48px;
}

.method-step {
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border);
}

.method-step:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.method-step h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.method-step p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.method-step h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-top: 16px;
  margin-bottom: 8px;
}

.method-faq h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.faq-more {
  margin-top: 16px;
  font-size: 15px;
}

.method-related {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.method-related .related-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s ease;
}

.method-related .related-card:hover {
  border-color: var(--color-accent);
}

.related-card h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.related-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

/* ==========================================================================
   Pages · 适用场景
   ========================================================================== */

.scenario-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.scenario-overview-text p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.scenario-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

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

.scenario-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.scenario-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.scenario-list > h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.scenario-list > p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

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

.scenario-list .scenario-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.scenario-list .scenario-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 12px rgba(31, 42, 55, 0.06);
}

.scenario-list .scenario-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.scenario-role,
.scenario-detail,
.scenario-collab {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.scenario-collab {
  margin-bottom: 14px;
}

.scenario-list .scenario-item a {
  font-size: 14px;
  font-weight: 500;
}

.cooperation-link {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.cooperation-link h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.cooperation-link p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

/* ==========================================================================
   Pages · 合作指引
   ========================================================================== */

.cooperation-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 40px;
}

.overview-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.overview-content p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.overview-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

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

.cooperation-timeline {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.cooperation-timeline h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.cooperation-timeline .section-intro {
  margin-bottom: 32px;
}

.timeline-list {
  position: relative;
  padding-left: 0;
}

.timeline-item {
  position: relative;
  padding: 0 0 32px 32px;
  border-left: 2px solid var(--color-border);
  margin-left: 8px;
}

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

.timeline-item::before {
  content: "";
  position: absolute;
  top: 4px;
  left: -8px;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.timeline-item p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
}

.timeline-output {
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 8px 12px;
  display: inline-block;
  margin-top: 4px;
}

.materials-checklist {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.materials-checklist h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.materials-checklist .section-intro {
  margin-bottom: 24px;
}

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

.materials-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.5;
}

.cooperation-method {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.cooperation-method h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.cooperation-method p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
  max-width: 720px;
}

.faq-link {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.faq-link h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.more-faq {
  margin-top: 16px;
  font-size: 15px;
}

.related-pages {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px 0;
}

.related-pages ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.related-pages ul li a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  line-height: 1.5;
}

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

/* ==========================================================================
   Pages · 资料中心
   ========================================================================== */

.resources-intro {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.resources-intro-copy p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.resources-intro-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.resources-intro-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.resources-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
}

.resources-list > h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

.resource-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

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

.resource-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.resource-item-head h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.resource-tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}

.resource-item-body {
  padding: 20px 24px;
}

.resource-item-body p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 10px;
}

.resource-item-body p:last-child {
  margin-bottom: 0;
}

.resource-item-body strong {
  font-weight: 600;
  color: var(--color-text);
}

.resources-list .cooperation-link {
  padding: 40px 0 0;
}

.cooperation-link-inner {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.cooperation-link-inner h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.cooperation-link-inner p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.cooperation-link-inner .btn-primary {
  margin-top: 12px;
}

.related-links-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 24px;
}

.related-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s ease;
}

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

.related-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.related-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ==========================================================================
   Pages · 常见问题
   ========================================================================== */

.faq-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 40px;
}

.faq-overview .overview-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.faq-overview .section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.faq-overview .overview-content p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.faq-overview .overview-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-layout.sidebar-left .faq-sidebar {
  position: sticky;
  top: 24px;
}

.faq-sidebar h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

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

.faq-group {
  margin-bottom: 40px;
}

.group-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.faq-more-hint {
  margin-top: 24px;
  font-size: 15px;
  color: var(--color-text-secondary);
}

.faq-more-hint a {
  font-weight: 500;
  margin-right: 16px;
}

.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

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

.related-links-item {
  font-size: 14px;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 16px;
  line-height: 1.5;
}

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

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: 60vh;
}

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

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

.error-panel h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {

  .hero-section {
    gap: 32px;
  }

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

  .timeline-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }

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

  .page-layout.sidebar-left {
    grid-template-columns: 200px 1fr;
    gap: 32px;
  }

}

@media (max-width: 900px) {

  .nav-toggle {
    display: flex;
    order: 2;
  }

  .site-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0;
    display: none;
  }

  .site-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    gap: 4px;
  }

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

  .site-nav .nav-list li a {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius);
  }

  .site-nav .header-cta {
    display: block;
    margin: 8px 24px 16px;
    text-align: center;
  }

  .site-nav.is-open {
    display: block;
  }

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

  .hero-content h1 {
    font-size: 30px;
  }

  .intro-layout,
  .method-overview,
  .scenario-overview,
  .overview-content,
  .resources-intro,
  .faq-overview .overview-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .link-cards,
  .related-links-grid,
  .scenario-items {
    grid-template-columns: 1fr;
  }

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

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

  .method-sidebar,
  .faq-sidebar {
    position: static;
    order: 2;
  }

  .method-content,
  .faq-groups {
    order: 1;
  }

}

@media (max-width: 768px) {

  .header-inner {
    padding: 0 16px;
    min-height: 64px;
  }

  .brand-tag {
    display: none;
  }

  .site-nav {
    top: 64px;
  }

  .hero-section {
    padding: 40px 16px 48px;
  }

  .hero-content h1 {
    font-size: 26px;
  }

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

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

  .hero-actions .btn {
    text-align: center;
  }

  .section-block {
    padding: 40px 16px;
  }

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

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

  .timeline-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .timeline-step {
    padding-top: 0;
    padding-left: 32px;
  }

  .timeline-step::before {
    top: 0;
    left: 8px;
    right: auto;
    width: 2px;
    height: 100%;
  }

  .timeline-step::after {
    top: 4px;
    left: 2px;
  }

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

  .page-header {
    padding: 20px 16px 20px;
  }

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

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

  .footer-cta {
    padding: 32px 16px 0;
  }

  .footer-bottom {
    padding: 16px;
  }

  .method-overview,
  .scenario-overview,
  .resources-intro,
  .faq-overview .overview-content,
  .overview-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-layout.sidebar-left {
    padding-left: 16px;
    padding-right: 16px;
  }

  .scenario-list,
  .cooperation-timeline,
  .materials-checklist,
  .cooperation-method,
  .faq-link,
  .resources-list,
  .cooperation-link,
  .method-related,
  .related-pages,
  .related-links {
    padding-left: 16px;
    padding-right: 16px;
  }

  .resource-item-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 16px;
  }

  .resource-item-body {
    padding: 16px;
  }

  .cooperation-link-inner {
    padding: 24px 20px;
  }

  .timeline-item {
    padding-left: 24px;
  }

  .error-main {
    padding: 60px 16px;
  }

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

}

@media (max-width: 480px) {

  .scenario-items {
    gap: 16px;
  }

  .scenario-list .scenario-item {
    padding: 20px;
  }

  .method-card {
    padding: 20px;
  }

  .link-card {
    padding: 20px;
  }

  .timeline-list {
    margin-left: 4px;
  }

  .timeline-item {
    padding-left: 20px;
  }

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

  .intro-media img,
  .method-overview-media img,
  .scenario-figure img,
  .overview-media img,
  .resources-intro-media img,
  .faq-overview .overview-media img {
    height: 220px;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 15px;
  }

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

}