/* ============================================================
   在线吃瓜网 · 全站样式表
   视觉方向：公共交通风 · 线路蓝 / 信号黄
   ============================================================ */

/* ------------------------------------------------------------
   Base · 基础变量与重置
   ------------------------------------------------------------ */
:root {
  --blue: #1a73e8;
  --blue-dark: #1557b0;
  --blue-light: #e8f0fe;
  --yellow: #ffb400;
  --yellow-light: #fff7e0;
  --dark: #1a1a1a;
  --gray-dark: #333;
  --gray: #5f6368;
  --gray-light: #9aa0a6;
  --bg-light: #f5f7fa;
  --white: #ffffff;
  --border: #e0e4e8;
  --radius: 8px;
  --container: 1200px;
  --header-h: 64px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--dark);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin-bottom: 0.5rem;
}

/* ------------------------------------------------------------
   Layout · 全站骨架
   ------------------------------------------------------------ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
}

/* 统一容器宽度 */
.header-inner,
.footer-inner,
.hero-content,
.need-selector,
.service-scope,
.workflow,
.case-preview,
.faq-section,
.contact-guide-inner,
.inner-main,
.page-layout,
.contact-prompt-content,
.series-contact-cta .cta-content,
.series-related,
.related-links-section {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: 0.02em;
}

.brand-tag {
  font-size: 0.75rem;
  color: var(--gray);
  font-weight: 400;
  border-left: 2px solid var(--yellow);
  padding-left: 8px;
  line-height: 1.2;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gray-dark);
  border-radius: 4px;
  line-height: 1.4;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--blue);
  background: var(--blue-light);
}

.nav-link.is-current {
  color: var(--blue);
  background: var(--blue-light);
  font-weight: 700;
}

/* ------------------------------------------------------------
   Components · 页脚
   ------------------------------------------------------------ */
.site-footer {
  background: var(--dark);
  color: #ccc;
  margin-top: 0;
}

.footer-inner {
  padding-top: 48px;
  padding-bottom: 32px;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr;
  gap: 48px;
}

.footer-brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 0.875rem;
  line-height: 1.8;
  color: #aaa;
}

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

.footer-link {
  font-size: 0.9375rem;
  color: #ccc;
  padding: 4px 0;
  display: inline-block;
}

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

.footer-feedback p {
  font-size: 0.875rem;
  color: #aaa;
  margin-bottom: 12px;
  line-height: 1.7;
}

.footer-feedback a {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--yellow);
  border: 1px solid #555;
  border-radius: var(--radius);
  padding: 8px 16px;
}

.footer-feedback a:hover {
  border-color: var(--yellow);
}

.footer-bottom {
  border-top: 1px solid #333;
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: #777;
  margin: 0;
}

/* ------------------------------------------------------------
   Components · 按钮与通用链接
   ------------------------------------------------------------ */
.cta-button {
  display: inline-block;
  background: var(--yellow);
  color: var(--dark);
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 28px;
  border-radius: var(--radius);
  border: 2px solid var(--yellow);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.cta-button:hover {
  background: #e6a200;
  border-color: #e6a200;
  color: var(--dark);
}

.cta-button.secondary {
  background: transparent;
  border-color: var(--yellow);
  color: var(--yellow);
}

.cta-button.secondary:hover {
  background: var(--yellow);
  color: var(--dark);
}

.text-link {
  display: inline-block;
  font-weight: 600;
  font-size: 0.9375rem;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--yellow);
}

/* ------------------------------------------------------------
   Components · 区块头部（首页）
   ------------------------------------------------------------ */
.section-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.section-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--blue);
  color: var(--white);
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  line-height: 1.4;
}

.section-head h2 {
  font-size: 1.5rem;
  color: var(--dark);
  margin: 0;
}

.section-desc {
  flex-basis: 100%;
  color: var(--gray);
  font-size: 0.9375rem;
  margin: 0;
}

/* ------------------------------------------------------------
   Components · FAQ 折叠面板
   ------------------------------------------------------------ */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  background: var(--white);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}

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

.faq-item summary::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--yellow);
  border-radius: 2px;
  flex-shrink: 0;
}

.faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--gray);
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid var(--border);
}

.faq-item p {
  padding: 16px 20px;
  color: var(--gray-dark);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.8;
}

/* ------------------------------------------------------------
   Components · 面包屑（内页统一）
   ------------------------------------------------------------ */
.breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 0.875rem;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

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

.breadcrumb-current {
  color: var(--dark);
  font-weight: 600;
}

/* ------------------------------------------------------------
   Components · 内页页头（统一骨架）
   ------------------------------------------------------------ */
.inner-main {
  padding-top: 32px;
  padding-bottom: 64px;
}

.page-header {
  margin: 24px 0 32px;
}

.page-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.3;
}

/* ------------------------------------------------------------
   Components · 内页通用 section 标题
   ------------------------------------------------------------ */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.section-lead {
  color: var(--gray);
  font-size: 0.9375rem;
  margin-bottom: 32px;
  max-width: 720px;
}

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

/* ------------------------------------------------------------
   Pages · 首页 hero
   ------------------------------------------------------------ */
.hero {
  position: relative;
  background: var(--dark);
  overflow: hidden;
}

.hero-figure {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 88px;
  padding-bottom: 88px;
  color: var(--white);
  max-width: var(--container);
}

.hero-content h1 {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  max-width: 640px;
}

.hero-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: #ddd;
  margin-bottom: 28px;
  max-width: 560px;
}

/* ------------------------------------------------------------
   Pages · 首页问题选择区
   ------------------------------------------------------------ */
.need-selector {
  padding-top: 64px;
  padding-bottom: 64px;
}

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

.need-card {
  display: block;
  background: var(--bg-light);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.need-card:hover {
  border-color: var(--blue);
  background: var(--white);
}

.need-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--blue-light);
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 1.25rem;
}

.need-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
  color: var(--dark);
}

.need-card p {
  font-size: 0.875rem;
  color: var(--gray);
  line-height: 1.7;
  margin: 0;
}

/* ------------------------------------------------------------
   Pages · 首页服务范围
   ------------------------------------------------------------ */
.service-scope {
  padding-bottom: 64px;
}

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

.scope-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.scope-card h3 {
  font-size: 1.125rem;
  color: var(--dark);
  padding-bottom: 8px;
  border-bottom: 3px solid var(--yellow);
  display: inline-block;
  align-self: flex-start;
}

.scope-card p {
  font-size: 0.875rem;
  color: var(--gray);
  line-height: 1.7;
  flex: 1;
}

.scope-card a {
  font-size: 0.875rem;
  font-weight: 600;
  align-self: flex-start;
}

/* ------------------------------------------------------------
   Pages · 首页工作流程
   ------------------------------------------------------------ */
.workflow {
  padding-bottom: 64px;
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step-item {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--blue);
  color: var(--white);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.9375rem;
  border-radius: 50%;
  margin-bottom: 16px;
}

.step-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 0.875rem;
  color: var(--gray);
  line-height: 1.7;
  margin: 0;
}

/* ------------------------------------------------------------
   Pages · 首页案例摘要
   ------------------------------------------------------------ */
.case-preview {
  padding-bottom: 64px;
}

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

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

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

.case-item figcaption {
  padding: 16px 20px 20px;
}

.case-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.case-item p {
  font-size: 0.8125rem;
  color: var(--gray);
  margin: 0;
}

.case-more {
  text-align: center;
}

/* ------------------------------------------------------------
   Pages · 首页 FAQ
   ------------------------------------------------------------ */
.faq-section {
  padding-bottom: 64px;
  max-width: var(--container);
}

/* ------------------------------------------------------------
   Pages · 首页联系引导
   ------------------------------------------------------------ */
.contact-guide {
  background: var(--blue-light);
  padding: 56px 0;
}

.contact-guide-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.contact-guide-inner .section-code {
  flex-shrink: 0;
}

.contact-guide-inner h2 {
  font-size: 1.5rem;
  margin: 0;
  flex: 1;
  min-width: 200px;
}

.contact-guide-inner p {
  color: var(--gray-dark);
  font-size: 0.9375rem;
  flex-basis: 100%;
  margin: 0;
}

.contact-guide-inner .cta-button {
  flex-shrink: 0;
}

/* ------------------------------------------------------------
   Pages · 精选影集 gallery
   ------------------------------------------------------------ */
.exhibition-hero {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 48px;
}

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

.exhibition-main-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.exhibition-caption {
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--gray);
  background: var(--bg-light);
}

.exhibition-intro .page-description {
  font-size: 1rem;
  color: var(--gray-dark);
  line-height: 1.9;
  margin: 0;
}

.filter-bar {
  margin-bottom: 48px;
}

.filter-title {
  font-size: 1.125rem;
  margin-bottom: 16px;
}

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

.filter-tag {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.875rem;
  color: var(--gray-dark);
}

.filter-tag:hover {
  background: var(--blue-light);
  border-color: var(--blue);
  color: var(--blue);
}

.work-grid {
  margin-bottom: 48px;
}

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

.work-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.work-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.work-figure {
  position: relative;
  overflow: hidden;
}

.work-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.work-card:hover .work-image {
  transform: scale(1.03);
}

.work-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(26, 26, 26, 0.75);
  color: var(--white);
  font-size: 0.8125rem;
  padding: 8px 12px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.work-card:hover .work-caption {
  opacity: 1;
}

.work-info {
  padding: 16px 20px 20px;
}

.work-title {
  font-size: 1rem;
  margin-bottom: 6px;
}

.work-desc {
  font-size: 0.8125rem;
  color: var(--gray);
  margin: 0;
  line-height: 1.6;
}

/* 分页 */
.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.pagination-link {
  display: inline-block;
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--gray-dark);
  background: var(--white);
}

.pagination-link:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.pagination-current {
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--gray);
  padding: 8px 12px;
}

/* 联系提示 */
.contact-prompt {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 40px;
  margin-bottom: 48px;
}

.contact-prompt-content {
  text-align: center;
}

.contact-prompt-title {
  font-size: 1.375rem;
  margin-bottom: 12px;
}

.contact-prompt-text {
  color: var(--gray);
  font-size: 0.9375rem;
  margin-bottom: 24px;
}

.contact-prompt-button {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  font-weight: 700;
  padding: 12px 28px;
  border-radius: var(--radius);
}

.contact-prompt-button:hover {
  background: var(--blue-dark);
  color: var(--white);
}

/* 相关链接 */
.related-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 0.875rem;
  color: var(--gray);
  font-weight: 600;
}

.related-links-item {
  font-size: 0.875rem;
}

/* ------------------------------------------------------------
   Pages · 主题系列 series
   ------------------------------------------------------------ */
.series-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 48px;
}

.series-hero-image {
  border-radius: var(--radius);
  overflow: hidden;
}

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

.series-hero-content p {
  font-size: 1rem;
  color: var(--gray-dark);
  line-height: 1.9;
  margin: 0;
}

/* 线路图 */
.series-map {
  margin-bottom: 56px;
}

.line-map {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 24px;
  flex-wrap: wrap;
}

.line-station {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  border-radius: 6px;
  padding: 8px 14px;
  border: 2px solid var(--border);
  transition: border-color 0.2s ease;
}

.station-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  color: var(--white);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.station-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dark);
}

.line-blue .station-code { background: var(--blue); }
.line-blue { border-color: var(--blue); }
.line-yellow .station-code { background: var(--yellow); color: var(--dark); }
.line-yellow { border-color: var(--yellow); }
.line-green .station-code { background: #34a853; }
.line-green { border-color: #34a853; }
.line-purple .station-code { background: #8430ce; }
.line-purple { border-color: #8430ce; }
.line-orange .station-code { background: #f4511e; }
.line-orange { border-color: #f4511e; }

/* 系列区块 */
.series-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 64px;
}

.series-block-reverse .series-block-media {
  order: 2;
}

.series-block-reverse .series-block-content {
  order: 1;
}

.series-block-media {
  border-radius: var(--radius);
  overflow: hidden;
}

.series-block-media img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

.series-block-content h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--yellow);
  display: inline-block;
}

.series-intro {
  font-size: 1rem;
  color: var(--gray-dark);
  margin-bottom: 12px;
  line-height: 1.8;
}

.series-block-content p {
  font-size: 0.9375rem;
  color: var(--gray);
  line-height: 1.8;
  margin-bottom: 16px;
}

.series-block-content a {
  font-weight: 600;
  font-size: 0.9375rem;
}

/* CTA */
.series-contact-cta {
  background: var(--blue);
  padding: 48px 24px;
  margin-bottom: 48px;
}

.cta-content {
  max-width: var(--container);
  margin: 0 auto;
  text-align: center;
}

.cta-content h2 {
  color: var(--white);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.cta-content p {
  color: #d0e0f8;
  margin-bottom: 24px;
}

/* 相关推荐 */
.series-related {
  margin-bottom: 48px;
}

.related-title {
  font-size: 1.125rem;
  margin-bottom: 16px;
}

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

.related-links a {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg-light);
  border-radius: var(--radius);
  font-size: 0.875rem;
}

/* ------------------------------------------------------------
   Pages · 拍摄方法 methods
   ------------------------------------------------------------ */
.page-intro-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 56px;
}

.intro-copy p {
  font-size: 1rem;
  color: var(--gray-dark);
  line-height: 1.9;
  margin: 0;
}

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

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

.intro-figure figcaption {
  padding: 10px 16px;
  font-size: 0.8125rem;
  color: var(--gray);
  background: var(--bg-light);
}

/* 流程步骤（纵向） */
.process-section {
  margin-bottom: 56px;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.process-step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 24px;
}

.process-step .step-number {
  flex-shrink: 0;
  margin: 0;
}

.step-content h3 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.9375rem;
  color: var(--gray);
  line-height: 1.8;
  margin: 0;
}

/* 准备清单 */
.checklist-section {
  margin-bottom: 56px;
}

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

.checklist-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.check-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--yellow-light);
  border: 2px solid var(--yellow);
  border-radius: 6px;
  flex-shrink: 0;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--dark);
}

.check-content h3 {
  font-size: 0.9375rem;
  margin-bottom: 4px;
}

.check-content p {
  font-size: 0.8125rem;
  color: var(--gray);
  margin: 0;
  line-height: 1.6;
}

/* 相关链接区 */
.related-links-section {
  margin-bottom: 0;
}

.related-links-section h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.related-links-section > p {
  color: var(--gray);
  font-size: 0.9375rem;
  margin-bottom: 16px;
}

.related-links-section .related-links {
  gap: 12px;
}

.related-links-section .related-links a {
  background: var(--bg-light);
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
}

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

/* ------------------------------------------------------------
   Pages · 项目记录 projects
   ------------------------------------------------------------ */
.page-hero {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 48px;
}

.hero-image {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 26, 26, 0.8), transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 32px;
}

.hero-overlay .page-intro {
  color: var(--white);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0;
  max-width: 640px;
}

.page-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

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

/* 概览 */
.project-overview {
  margin-bottom: 48px;
}

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

.overview-item {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.overview-label {
  font-size: 0.8125rem;
  color: var(--gray);
  font-weight: 600;
}

.overview-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
}

/* 过程纪实 */
.project-process {
  margin-bottom: 48px;
}

.process-entry {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 40px;
}

.process-entry:nth-child(even) {
  direction: rtl;
}

.process-entry:nth-child(even) > * {
  direction: ltr;
}

.process-text h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.process-text p {
  font-size: 0.9375rem;
  color: var(--gray);
  line-height: 1.8;
  margin: 0;
}

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

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

.process-figure figcaption {
  padding: 8px 12px;
  font-size: 0.8125rem;
  color: var(--gray);
  background: var(--bg-light);
}

/* 成片图集 */
.result-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

.result-item img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.result-item figcaption {
  padding: 10px 12px;
  font-size: 0.8125rem;
  color: var(--gray);
  text-align: center;
}

/* 侧栏 */
.project-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 24px;
}

.sidebar-title {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--yellow);
}

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

.sidebar-links li a {
  font-size: 0.875rem;
  display: inline-block;
  padding: 4px 0;
}

/* 联系引导 */
.contact-guide {
  margin-top: 48px;
}

.guide-link {
  display: inline-block;
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 28px;
  background: var(--blue);
  color: var(--white);
  border-radius: var(--radius);
}

.guide-link:hover {
  background: var(--blue-dark);
  color: var(--white);
}

/* ------------------------------------------------------------
   Pages · 联系路径 contact
   ------------------------------------------------------------ */
.contact-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 48px;
}

.intro-media {
  border-radius: var(--radius);
  overflow: hidden;
}

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

.intro-content p {
  font-size: 1rem;
  color: var(--gray-dark);
  line-height: 1.9;
  margin: 0;
}

/* 合作流程 */
.cooperation-process .process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-item {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 24px;
}

.process-item .step-number {
  margin-bottom: 12px;
}

.process-item .step-content h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.process-item .step-content p {
  font-size: 0.875rem;
  color: var(--gray);
  line-height: 1.7;
  margin: 0;
}

/* 咨询渠道 */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.channel-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.channel-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--yellow);
  display: inline-block;
}

.channel-card p {
  font-size: 0.9375rem;
  color: var(--gray);
  line-height: 1.8;
  margin-bottom: 16px;
}

.channel-link {
  font-weight: 600;
  font-size: 0.9375rem;
}

/* 反馈路径 */
.feedback-path {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 40px;
}

.feedback-path .section-title {
  margin-bottom: 8px;
}

.feedback-path > p {
  color: var(--gray);
  font-size: 0.9375rem;
  margin-bottom: 24px;
}

.feedback-entry {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.feedback-btn {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  font-weight: 700;
  padding: 12px 28px;
  border-radius: var(--radius);
}

.feedback-btn:hover {
  background: var(--blue-dark);
  color: var(--white);
}

.feedback-note {
  font-size: 0.8125rem;
  color: var(--gray);
  margin: 0;
}

/* 相关推荐 */
.aside-block {
  margin-top: 48px;
}

.aside-title {
  font-size: 1.125rem;
  margin-bottom: 16px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 640px;
}

.related-list li a {
  display: block;
  padding: 12px 16px;
  background: var(--bg-light);
  border-radius: var(--radius);
  font-size: 0.9375rem;
}

.related-list li a:hover {
  background: var(--blue-light);
  color: var(--blue);
}

/* ------------------------------------------------------------
   Pages · 404
   ------------------------------------------------------------ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

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

.error-code {
  font-family: var(--mono);
  font-size: 4rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1.2;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-desc {
  color: var(--gray);
  font-size: 1rem;
  margin-bottom: 24px;
}

.error-link {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  font-weight: 700;
  padding: 12px 28px;
  border-radius: var(--radius);
  margin-bottom: 24px;
}

.error-link:hover {
  background: var(--blue-dark);
  color: var(--white);
}

.error-help {
  font-size: 0.875rem;
  color: var(--gray);
  margin: 0;
}

/* ------------------------------------------------------------
   Responsive · 响应式
   ------------------------------------------------------------ */
@media (max-width: 992px) {
  .grid-container {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .page-layout {
    grid-template-columns: 1fr;
  }

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

  .series-hero,
  .page-intro-block,
  .contact-intro {
    grid-template-columns: 1fr;
  }

  .exhibition-hero {
    grid-template-columns: 1fr;
  }

  .exhibition-main-image {
    height: 320px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer-feedback {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .site-header {
    position: relative;
  }

  .header-inner {
    height: auto;
    flex-direction: column;
    align-items: stretch;
    padding-top: 12px;
    padding-bottom: 12px;
    gap: 12px;
  }

  .brand {
    justify-content: center;
  }

  .site-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

  .site-nav::-webkit-scrollbar {
    height: 3px;
  }

  .site-nav::-webkit-scrollbar-thumb {
    background: var(--gray-light);
    border-radius: 3px;
  }

  .nav-link {
    padding: 8px 12px;
    font-size: 0.875rem;
    white-space: nowrap;
  }

  .nav-link::after {
    content: "";
    display: inline-block;
    width: 1px;
    height: 14px;
    background: var(--border);
    margin-left: 12px;
    vertical-align: middle;
  }

  .nav-link:last-child::after {
    display: none;
  }

  .hero-content {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .hero-content h1 {
    font-size: 1.75rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

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

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

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

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

  .series-block {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .series-block-reverse .series-block-media {
    order: 0;
  }

  .series-block-reverse .series-block-content {
    order: 0;
  }

  .series-block-media img {
    height: 240px;
  }

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

  .process-entry:nth-child(even) {
    direction: ltr;
  }

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

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

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

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

  .hero-overlay {
    padding: 20px;
  }

  .hero-image {
    height: 280px;
  }

  .project-sidebar {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 40px;
  }

  .footer-feedback {
    grid-column: auto;
  }

  .contact-guide-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .contact-guide-inner h2 {
    flex-basis: auto;
    min-width: 0;
  }

  .contact-prompt {
    padding: 32px 20px;
  }

  .breadcrumb {
    padding: 12px 16px 0;
    font-size: 0.8125rem;
  }

  .inner-main {
    padding-top: 20px;
    padding-bottom: 40px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .need-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .line-map {
    flex-direction: column;
    align-items: stretch;
  }

  .line-station {
    justify-content: flex-start;
  }

  .filter-tags {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
  }

  .filter-tag {
    flex-shrink: 0;
  }

  .hero-content {
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

  .hero-content p {
    font-size: 0.9375rem;
  }

  .cta-button {
    display: block;
    text-align: center;
    padding: 12px 20px;
  }

  .section-head {
    gap: 12px;
  }

  .section-code {
    font-size: 0.75rem;
    padding: 3px 8px;
  }

  .section-head h2 {
    font-size: 1.25rem;
  }

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

  .related-links {
    flex-direction: column;
    align-items: flex-start;
  }

  .series-contact-cta {
    padding: 32px 16px;
  }

  .feedback-entry {
    flex-direction: column;
    align-items: flex-start;
  }

  .feedback-btn {
    width: 100%;
    text-align: center;
  }
}

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}