/* ============================================================
   大象传媒 · 全站样式表
   版本：1.0
   说明：覆盖整站 DOM 契约中全部语义 class，统一视觉语法
   ============================================================ */

/* ============================================================
   Base — 变量、重置、全局字体与颜色
   ============================================================ */
:root {
  --color-bg: #f4f1ea;
  --color-primary: #2d5345;
  --color-primary-light: #3a6b5a;
  --color-accent: #c9a87c;
  --color-text: #3a3a3a;
  --color-text-light: #6b6b6b;
  --color-card: #ffffff;
  --color-border: #e2ddd2;
  --color-footer-bg: #2a2a2a;
  --color-footer-text: #c8c8c8;
  --font-sans: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container-width: 1180px;
  --radius: 4px;
  --radius-card: 6px;
  --transition: 0.2s 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: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul,
ol {
  list-style: none;
}

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

/* ============================================================
   Layout — 全站容器、页头、页脚、面包屑
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

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

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

.brand-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  justify-content: flex-end;
}

/* 导航列表（桌面端显示） */
.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);
  transition: background-color var(--transition), color var(--transition);
}

.nav-list li a:hover {
  color: var(--color-primary);
  background-color: rgba(45, 83, 69, 0.06);
}

.nav-list li a.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background-color: rgba(45, 83, 69, 0.08);
}

/* 汉堡按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0;
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

/* 咨询按钮 */
.consult-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background-color var(--transition);
}

.consult-btn:hover {
  background-color: var(--color-primary-light);
  color: #ffffff;
}

.consult-btn.is-current {
  background-color: var(--color-primary-light);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 14px;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

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

.breadcrumb-sep {
  color: #b0aca3;
}

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

/* ---------- 主内容 ---------- */
.site-main {
  min-height: 60vh;
}

.inner-main {
  padding-bottom: 80px;
}

/* ---------- 页面标题区 ---------- */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 40px;
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.8;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding-top: 60px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.footer-col h3.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links li a {
  font-size: 14px;
  color: var(--color-footer-text);
  line-height: 1.6;
}

.footer-links li a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 24px;
  text-align: center;
  font-size: 14px;
  color: #8a8a8a;
}

.footer-bottom p {
  line-height: 1.6;
}

/* ============================================================
   Components — 通用组件
   ============================================================ */

/* ---------- 区块标题与头部 ---------- */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.section-link {
  font-size: 15px;
  color: var(--color-primary);
  white-space: nowrap;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

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

.section-intro {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 32px;
  line-height: 1.8;
}

.section-heading {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.3;
}

/* ---------- 图片容器 ---------- */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-top: 8px;
}

/* ---------- 折叠面板 ---------- */
.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
}

.faq-item summary {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 22px;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

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

.faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.faq-answer p {
  margin-bottom: 10px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

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

/* ---------- Hero 首屏 ---------- */
.hero-section {
  padding: 60px 24px 48px;
}

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

.hero-eyebrow {
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background-color var(--transition);
}

.hero-cta:hover {
  background-color: var(--color-primary-light);
  color: #ffffff;
}

.hero-figure {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: #e8e4db;
}

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

/* ---------- 服务索引 ---------- */
.service-index {
  max-width: var(--container-width);
  margin: 48px auto 0;
}

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

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

.service-index-list li a {
  display: block;
  padding: 20px 20px 18px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.service-index-list li a:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(45, 83, 69, 0.08);
}

/* ---------- 项目精选 ---------- */
.project-gallery-section {
  padding: 64px 24px;
}

.project-gallery-section .section-head {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
}

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

.project-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.project-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.project-card a {
  display: block;
  color: var(--color-text);
}

.project-figure {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: #e8e4db;
}

.project-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.project-card a:hover .project-figure img {
  transform: scale(1.03);
}

.project-meta {
  padding: 16px 20px 20px;
}

.project-category {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.project-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

/* ---------- 工作方法摘要 ---------- */
.method-summary-section {
  padding: 0 24px 64px;
}

.method-summary-section .section-head {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
}

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

.method-step {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  position: relative;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  border-radius: 50%;
  margin-bottom: 16px;
}

.step-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---------- 合作预览 ---------- */
.cooperation-preview-section {
  padding: 0 24px 64px;
}

.cooperation-preview-section .section-head {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
}

.cooperation-nodes {
  max-width: var(--container-width);
  margin: 0 auto 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.cooperation-node {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 20px;
}

.cooperation-node .node-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

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

.feedback-note {
  max-width: var(--container-width);
  margin: 0 auto;
  font-size: 14px;
  color: var(--color-text-light);
  padding: 16px 20px;
  background-color: rgba(201, 168, 124, 0.1);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  line-height: 1.7;
}

/* ---------- FAQ 预览 ---------- */
.faq-preview-section {
  padding: 0 24px 64px;
}

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

.faq-preview-list {
  max-width: var(--container-width);
  margin: 0 auto;
}

/* ---------- 动态预览 ---------- */
.news-preview-section {
  padding: 0 24px 64px;
}

.news-preview-section .section-head {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
}

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

.news-preview-item a {
  display: block;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  height: 100%;
  transition: border-color var(--transition);
}

.news-preview-item a:hover {
  border-color: var(--color-primary);
}

.news-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.news-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---------- 合作引导条 ---------- */
.cta-bar {
  max-width: var(--container-width);
  margin: 0 auto 64px;
  padding: 40px 48px;
  background-color: var(--color-primary);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-text {
  font-size: 18px;
  color: #ffffff;
  line-height: 1.6;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: #ffffff;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background-color var(--transition);
}

.cta-btn:hover {
  background-color: #f0ece4;
  color: var(--color-primary);
}

/* ============================================================
   Pages — 服务领域
   ============================================================ */

.service-categories {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.service-categories .section-intro {
  margin-bottom: 32px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.category-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.category-card-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #e8e4db;
}

.category-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.category-card-body {
  padding: 24px;
  flex: 1;
}

.category-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

.category-detail {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  align-items: start;
}

.detail-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
  padding-top: 2px;
}

.detail-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---------- 服务指引 ---------- */
.service-guide {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.guide-content {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px;
}

.guide-content .section-title {
  margin-bottom: 16px;
}

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

.guide-content p:last-child {
  margin-bottom: 0;
}

/* ---------- 报价说明 ---------- */
.service-detail-note {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.note-card {
  background-color: rgba(45, 83, 69, 0.05);
  border: 1px solid rgba(45, 83, 69, 0.15);
  border-radius: var(--radius-card);
  padding: 32px;
}

.note-card .section-title {
  margin-bottom: 16px;
}

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

.note-card p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   Pages — 项目实录
   ============================================================ */

.project-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.project-list > .section-title {
  margin-bottom: 32px;
}

.project-item {
  margin-bottom: 48px;
}

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

.project-media {
  aspect-ratio: 16 / 7;
  overflow: hidden;
  border-radius: var(--radius-card);
  background-color: #e8e4db;
  margin-bottom: 16px;
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-meta {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.project-category {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.04em;
}

.project-name {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
}

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

.project-description {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 780px;
}

/* ---------- 项目导航 ---------- */
.project-nav {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

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

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

.project-nav-list li a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--color-text);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), background-color var(--transition);
}

.project-nav-list li a:hover {
  border-color: var(--color-primary);
  background-color: rgba(45, 83, 69, 0.05);
}

/* ============================================================
   Pages — 工作方法
   ============================================================ */

.method-steps-detail {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.content-media-inline {
  margin-bottom: 24px;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: #e8e4db;
}

.content-media-inline img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.content-media-inline figcaption {
  padding: 8px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-card) var(--radius-card);
}

.method-steps-detail .section-intro {
  margin-bottom: 40px;
}

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

.step-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding-bottom: 40px;
  position: relative;
}

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

.step-item::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 56px;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.step-item:last-child::before {
  display: none;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 18px;
  font-weight: 600;
  border-radius: 50%;
  z-index: 1;
}

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

.step-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 8px;
}

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

.step-confirm strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* ---------- 协作原则 ---------- */
.cooperation-principles {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

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

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

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

.principle-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.principle-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ---------- 相关链接 ---------- */
.method-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.method-links .section-heading {
  margin-bottom: 24px;
}

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

.method-link-card {
  display: block;
  padding: 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.method-link-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(45, 83, 69, 0.08);
}

.link-title {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.link-desc {
  display: block;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ============================================================
   Pages — 合作说明
   ============================================================ */

.preparation-section,
.key-nodes-section,
.feedback-mechanism-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

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

.preparation-col {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
}

.col-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.preparation-list li {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  padding: 8px 0 8px 20px;
  position: relative;
}

.preparation-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 18px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* ---------- 关键节点 ---------- */
.key-nodes-section .section-intro {
  margin-bottom: 32px;
}

.key-nodes-list {
  position: relative;
}

.node-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 0 0 28px;
  position: relative;
}

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

.node-item::before {
  content: '';
  position: absolute;
  left: 79px;
  top: 28px;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}

.node-item:last-child::before {
  display: none;
}

.node-item .node-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 4px 0;
  position: relative;
  z-index: 1;
  background-color: var(--color-bg);
  display: inline-block;
  width: fit-content;
  padding-right: 12px;
}

.node-item .node-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  padding-top: 4px;
}

/* ---------- 反馈机制 ---------- */
.feedback-content {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px;
}

.feedback-content p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 14px;
}

.feedback-content p:last-child {
  margin-bottom: 0;
}

/* ---------- 合作引导 ---------- */
.cooperation-cta {
  max-width: var(--container-width);
  margin: 0 auto 40px;
  padding: 0 24px;
}

.cooperation-cta p {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.8;
}

.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background-color var(--transition);
}

.cta-link:hover {
  background-color: var(--color-primary-light);
  color: #ffffff;
}

/* ---------- 合作媒体图 ---------- */
.cooperation-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.cooperation-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  border-radius: var(--radius-card);
}

.cooperation-media figcaption {
  padding: 8px 4px;
}

/* ============================================================
   Pages — 常见问题
   ============================================================ */

.faq-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.faq-section .section-title {
  margin-bottom: 20px;
}

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

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

.faq-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  border-radius: var(--radius-card);
}

.faq-media figcaption {
  padding: 8px 4px;
}

/* ============================================================
   Pages — 品牌动态
   ============================================================ */

.news-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.news-section > .section-title {
  margin-bottom: 32px;
}

.news-item {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 20px;
}

.news-media {
  min-height: 100%;
  background-color: #e8e4db;
}

.news-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.news-content {
  padding: 24px 24px 24px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-headline {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.news-summary {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.news-link-wrap a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.news-link-wrap a:hover {
  text-decoration: underline;
}

/* ---------- 动态摘要 ---------- */
.news-digest-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.news-digest-section > .section-title {
  margin-bottom: 24px;
}

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

.digest-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.digest-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

.digest-link a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
}

.digest-link a:hover {
  text-decoration: underline;
}

/* ---------- 更新说明 ---------- */
.update-note-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.update-note-section > .section-title {
  margin-bottom: 16px;
}

.update-note-text {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  background-color: rgba(201, 168, 124, 0.1);
  border-left: 3px solid var(--color-accent);
  padding: 16px 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

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

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

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

.error-title {
  font-size: 26px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 32px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background-color var(--transition);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  color: #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background-color: var(--color-card);
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), background-color var(--transition);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background-color: rgba(45, 83, 69, 0.04);
}

/* ============================================================
   Responsive — 响应式断点
   ============================================================ */

/* ---------- 平板及以下 ---------- */
@media (max-width: 992px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

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

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

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

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

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

  .news-item {
    grid-template-columns: 220px 1fr;
  }

  .node-item {
    grid-template-columns: 120px 1fr;
  }

  .node-item::before {
    left: 59px;
  }
}

/* ---------- 手机端 ---------- */
@media (max-width: 768px) {
  .header-inner {
    height: 64px;
    padding: 0 16px;
  }

  .brand-text {
    font-size: 20px;
  }

  /* 汉堡按钮显示 */
  .nav-toggle {
    display: flex;
  }

  /* 导航列表默认收起 */
  .nav-list {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 16px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06);
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list li a {
    display: block;
    padding: 12px 16px;
    font-size: 16px;
    width: 100%;
  }

  .site-nav {
    gap: 8px;
  }

  .consult-btn {
    padding: 10px 16px;
    font-size: 14px;
  }

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

  .page-header {
    padding: 32px 16px 28px;
  }

  .page-title {
    font-size: 28px;
  }

  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
    padding: 0 16px 32px;
  }

  .footer-bottom {
    padding: 16px;
  }

  /* ---------- 首页 ---------- */
  .hero-section {
    padding: 40px 16px 32px;
  }

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

  .hero-figure {
    aspect-ratio: 4 / 3;
  }

  .service-index {
    margin-top: 32px;
  }

  .service-index-list {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .service-index-list li a {
    padding: 16px;
    font-size: 15px;
  }

  .project-gallery-section {
    padding: 48px 16px;
  }

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

  .method-summary-section {
    padding: 0 16px 48px;
  }

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

  .cooperation-preview-section {
    padding: 0 16px 48px;
  }

  .cooperation-nodes {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .cooperation-node {
    padding: 16px;
  }

  .faq-preview-section {
    padding: 0 16px 48px;
  }

  .news-preview-section {
    padding: 0 16px 48px;
  }

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

  .cta-bar {
    margin: 0 16px 48px;
    padding: 28px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .cta-text {
    font-size: 17px;
  }

  /* ---------- 内页 ---------- */
  .inner-main {
    padding-bottom: 48px;
  }

  .service-categories,
  .service-guide,
  .service-detail-note,
  .project-list,
  .project-nav,
  .method-steps-detail,
  .cooperation-principles,
  .method-links,
  .preparation-section,
  .key-nodes-section,
  .feedback-mechanism-section,
  .cooperation-cta,
  .cooperation-media,
  .faq-section,
  .faq-media,
  .news-section,
  .news-digest-section,
  .update-note-section {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .category-card-body {
    padding: 20px;
  }

  .guide-content,
  .note-card,
  .feedback-content {
    padding: 24px 20px;
  }

  .project-media {
    aspect-ratio: 4 / 3;
  }

  .project-meta {
    flex-direction: column;
    gap: 4px;
  }

  .project-name {
    font-size: 20px;
  }

  .project-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .content-media-inline img {
    aspect-ratio: 4 / 3;
  }

  .step-item {
    grid-template-columns: 44px 1fr;
    gap: 16px;
  }

  .step-number {
    width: 44px;
    height: 44px;
    font-size: 16px;
  }

  .step-item::before {
    left: 21px;
  }

  .principles-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .principle-card {
    padding: 20px 16px;
  }

  .links-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .preparation-col {
    padding: 24px 20px;
  }

  .node-item {
    grid-template-columns: 1fr;
    gap: 4px;
    padding-bottom: 24px;
  }

  .node-item::before {
    display: none;
  }

  .node-item .node-name {
    background-color: transparent;
    padding-right: 0;
  }

  .cooperation-media img {
    aspect-ratio: 4 / 3;
  }

  .faq-media img {
    aspect-ratio: 4 / 3;
  }

  .news-item {
    grid-template-columns: 1fr;
  }

  .news-media {
    aspect-ratio: 16 / 9;
  }

  .news-image {
    aspect-ratio: 16 / 9;
  }

  .news-content {
    padding: 20px;
  }

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

  .digest-item {
    padding: 20px;
  }

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

  .error-actions {
    flex-direction: column;
    gap: 12px;
  }

  .error-actions .btn-primary,
  .error-actions .btn-secondary {
    width: 100%;
  }
}

/* ---------- 小屏手机 ---------- */
@media (max-width: 420px) {
  .service-index-list {
    grid-template-columns: 1fr;
  }

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

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

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

  .consult-btn {
    padding: 10px 14px;
    font-size: 13px;
  }

  .hero-cta,
  .cta-btn,
  .cta-link,
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }

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