/* ==========================================================================
   吃瓜网51 · 整站样式表
   视觉方向：建筑事务所风 —— 深灰、暖灰、黄色点缀，严谨网格与留白
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
:root {
  --color-dark: #1F2328;
  --color-bg: #F5F2EE;
  --color-accent: #D9A441;
  --color-ink: #2B2F33;
  --color-muted: #6B7076;
  --color-line: #E3DED6;
  --color-white: #FFFFFF;
  --font-head: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Georgia", "Times New Roman", "Songti SC", serif;
  --container-width: 1200px;
  --radius: 6px;
  --header-h: 72px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

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

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

ul,
ol {
  list-style: none;
}

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

/* --------------------------------------------------------------------------
   Layout 骨架
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-dark);
  position: sticky;
  top: 0;
  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: var(--header-h);
}

.brand {
  flex-shrink: 0;
}

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

.brand-name {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 1px;
}

.brand-tag {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.5px;
}

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

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-head);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

.nav-link.is-current {
  color: var(--color-accent);
  background-color: rgba(217, 164, 65, 0.12);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

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

/* 面包屑 */
.breadcrumb {
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

.breadcrumb-sep {
  color: var(--color-muted);
  opacity: 0.6;
}

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

/* 页面标题区（内页统一） */
.page-header {
  padding: 36px 0 20px;
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.25;
}

.page-description {
  margin-top: 12px;
  font-size: 15px;
  color: var(--color-muted);
  max-width: 720px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  margin-top: 80px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
}

.footer-brand-name {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col-title {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

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

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

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

.footer-note p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* 页面主题类（仅用于 body 标识，不覆盖全局） */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-body .site-main {
  flex: 1;
}

/* --------------------------------------------------------------------------
   通用组件
   -------------------------------------------------------------------------- */
/* 区块标题 */
.section-heading,
.section-head {
  margin-bottom: 32px;
}

.section-heading h2,
.section-head h2,
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 10px;
  position: relative;
  padding-bottom: 14px;
}

.section-heading h2::after,
.section-head h2::after,
.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background-color: var(--color-accent);
}

.section-heading p,
.section-head p,
.section-intro {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 640px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 640px;
}

/* 状态标签 */
.status-label {
  display: inline-block;
  font-size: 12px;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 2px 10px;
  border-radius: 20px;
  font-family: var(--font-head);
  letter-spacing: 0.5px;
}

.status-badge {
  display: inline-block;
  font-size: 12px;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 2px 10px;
  border-radius: 20px;
  font-family: var(--font-head);
}

/* 图片容器 */
.content-media {
  margin: 0;
}

.content-media img,
.hero-figure img,
.delivery-figure img,
.solution-media img,
.media-figure img,
.about-figure img,
.aside-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-media figcaption,
.delivery-figure figcaption,
.media-figure figcaption,
.about-figure figcaption,
.aside-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 10px 0 0;
  line-height: 1.5;
}

/* 通用链接按钮 */
.entry-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 4px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.section-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 4px;
  margin-top: 24px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item summary {
  padding: 18px 20px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent);
  transition: transform 0.3s ease;
}

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

.faq-item summary:hover {
  background-color: rgba(217, 164, 65, 0.06);
}

.faq-item p {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
}

/* 相关链接条 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 14px;
}

.related-links-label {
  color: var(--color-muted);
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.5px;
}

.related-links-item {
  color: var(--color-dark);
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 2px;
  font-family: var(--font-head);
  font-size: 14px;
}

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

/* --------------------------------------------------------------------------
   首页
   -------------------------------------------------------------------------- */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero 对比区 */
.hero-compare {
  padding: 56px 0 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: start;
}

.hero-copy h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-dark);
  color: var(--color-white);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius);
  transition: background-color 0.2s ease;
}

.hero-cta:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.hero-visual {
  position: relative;
}

.hero-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}

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

/* 对比卡片 */
.hero-cards {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 16px;
}

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

.audience-card h2 {
  font-size: 18px;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.audience-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

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

/* 首页主图 */
.content-media-primary {
  grid-column: 1 / -1;
  margin-top: 32px;
  border-radius: var(--radius);
  overflow: hidden;
}

.content-media-primary img {
  aspect-ratio: 16 / 6;
}

.content-media-primary figcaption {
  padding: 10px 4px;
}

/* 服务能力概览 */
.capability-overview {
  padding: 64px 0 40px;
}

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

.capability-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(31, 35, 40, 0.08);
}

.capability-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.capability-card p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}

/* 行业方案对照 */
.solution-compare {
  padding: 40px 0;
}

.compare-table {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--color-white);
}

.compare-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr 1fr;
  border-bottom: 1px solid var(--color-line);
}

.compare-row:last-child {
  border-bottom: none;
}

.compare-cell {
  padding: 20px 24px;
}

.compare-cell + .compare-cell {
  border-left: 1px solid var(--color-line);
}

.compare-cell h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.compare-cell p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 交付流程摘要 */
.delivery-summary {
  padding: 40px 0;
}

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

.process-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.process-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 0 0 3px 3px;
}

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

.process-step p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.7;
}

.prepare-info {
  display: block;
  font-size: 13px;
  color: var(--color-accent);
  font-family: var(--font-head);
  padding-top: 10px;
  border-top: 1px dashed var(--color-line);
}

/* 最新洞察 */
.insight-preview {
  padding: 40px 0;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px 28px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.article-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.article-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

.article-item .status-label {
  flex-shrink: 0;
  margin-top: 4px;
}

/* FAQ 精选 */
.faq-preview {
  padding: 40px 0;
}

/* 合作咨询入口 */
.cooperation-entry {
  padding: 48px 0;
  background-color: var(--color-dark);
  border-radius: var(--radius);
  margin: 40px 0;
}

.cooperation-entry .section-heading {
  padding: 0 40px;
}

.cooperation-entry .section-heading h2 {
  color: var(--color-white);
}

.cooperation-entry .section-heading h2::after {
  background-color: var(--color-accent);
}

.cooperation-entry .section-heading p {
  color: rgba(255, 255, 255, 0.6);
}

.prepare-checklist {
  padding: 0 40px 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.prepare-checklist li {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-head);
}

.cooperation-entry .entry-link {
  margin-left: 40px;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.cooperation-entry .entry-link:hover {
  color: var(--color-white);
  border-color: var(--color-white);
}

/* --------------------------------------------------------------------------
   内页通用：页面标题区
   -------------------------------------------------------------------------- */
.page-heading {
  padding: 0 0 32px;
}

.page-heading-desc,
.page-intro,
.page-title-desc {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 720px;
  line-height: 1.8;
}

/* 内页配图 */
.content-media-inline {
  margin-top: 24px;
  border-radius: var(--radius);
  overflow: hidden;
}

.content-media-inline img {
  aspect-ratio: 16 / 7;
}

/* --------------------------------------------------------------------------
   业务体系页
   -------------------------------------------------------------------------- */
.service-grid-section {
  padding: 32px 0 48px;
}

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

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.service-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.service-card-head h3 {
  font-size: 17px;
}

.service-status {
  font-size: 12px;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 2px 10px;
  border-radius: 20px;
  font-family: var(--font-head);
  flex-shrink: 0;
}

.service-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.service-scope {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--color-line);
}

.scope-label {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.service-scope p:not(.scope-label) {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.service-scope p:last-child {
  margin-bottom: 0;
}

/* 服务边界 */
.boundary-section {
  padding: 40px 0;
}

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

.boundary-item {
  background-color: var(--color-white);
  border-left: 3px solid var(--color-accent);
  padding: 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

.boundary-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
}

/* 合作入口 */
.service-entry-section {
  padding: 40px 0;
}

.service-entry-content {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
}

.service-entry-content h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.service-entry-content p {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto 24px;
  line-height: 1.8;
}

.entry-links {
  display: flex;
  justify-content: center;
  gap: 32px;
}

/* --------------------------------------------------------------------------
   行业方案页
   -------------------------------------------------------------------------- */
.page-title-area {
  padding: 0 0 32px;
}

.solution-list-section {
  padding: 32px 0 48px;
}

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

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

.solution-media {
  margin: 0;
  overflow: hidden;
}

.solution-media img {
  aspect-ratio: 16 / 9;
  transition: transform 0.3s ease;
}

.solution-card:hover .solution-media img {
  transform: scale(1.03);
}

.solution-content {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.solution-name {
  font-size: 18px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.solution-demand,
.solution-fit {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.solution-demand::before {
  content: "典型需求";
  display: block;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-dark);
}

.solution-fit::before {
  content: "适配方案";
  display: block;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-dark);
}

.solution-note {
  font-size: 13px;
  color: var(--color-muted);
  font-style: italic;
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px dashed var(--color-line);
}

.solution-link {
  margin-top: 16px;
  align-self: flex-start;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

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

/* 方案选择指引 */
.guide-section {
  padding: 40px 0;
}

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

.guide-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.guide-heading {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--color-dark);
  position: relative;
  padding-left: 16px;
}

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

.guide-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
}

/* 合作入口 */
.solutions .cooperation-entry {
  padding: 48px 40px;
  text-align: center;
}

.solutions .cooperation-entry .section-title {
  color: var(--color-white);
}

.solutions .cooperation-entry .section-intro {
  color: rgba(255, 255, 255, 0.6);
  margin: 0 auto 24px;
}

.solutions .cooperation-entry .entry-link {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   交付体系页
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
}

/* 交付四阶段 */
.delivery-stages {
  padding: 32px 0 48px;
}

.stage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.stage-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.stage-number {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.stage-name {
  font-size: 16px;
  margin-bottom: 8px;
}

.stage-action {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.stage-prep {
  font-size: 13px;
  color: var(--color-muted);
  border-top: 1px dashed var(--color-line);
  padding-top: 10px;
  line-height: 1.6;
}

.stage-prep strong {
  display: block;
  font-family: var(--font-head);
  color: var(--color-dark);
  margin-bottom: 4px;
}

.delivery-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}

.delivery-figure img {
  aspect-ratio: 16 / 6;
}

/* 信息准备清单 */
.prep-checklist {
  padding: 40px 0;
}

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

.checklist-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.check-label {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  background-color: rgba(217, 164, 65, 0.12);
  padding: 4px 12px;
  border-radius: 4px;
  flex-shrink: 0;
  min-width: 72px;
  text-align: center;
}

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

/* 项目状态说明 */
.status-explainer {
  padding: 40px 0;
}

.status-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 640px;
}

.status-rules {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.status-rule .status-badge {
  flex-shrink: 0;
  margin-top: 2px;
}

.status-rule p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 相关入口 */
.related-entry {
  padding: 40px 0;
}

.related-entry .entry-links {
  justify-content: flex-start;
}

/* --------------------------------------------------------------------------
   洞察页
   -------------------------------------------------------------------------- */
.insights-list-section,
.topic-section,
.related-section {
  padding: 32px 0;
}

.insights-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.insight-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
}

.insight-media {
  margin: 0;
  overflow: hidden;
}

.media-figure {
  margin: 0;
  height: 100%;
}

.media-figure img {
  aspect-ratio: 4 / 3;
  height: 100%;
}

.insight-body {
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
}

.insight-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.insight-summary {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.insight-status {
  margin-top: auto;
}

/* 专题入口 */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.topic-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.topic-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.topic-title {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.topic-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 相关推荐 */
.related-section .related-links {
  padding: 0;
  display: flex;
  gap: 24px;
}

.related-link {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

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

/* --------------------------------------------------------------------------
   关于我们页
   -------------------------------------------------------------------------- */
.about-intro {
  padding: 32px 0 48px;
}

.about-intro-content {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.about-text-block h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

.about-text-block p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}

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

/* 服务原则 */
.principle-section {
  padding: 40px 0;
}

.principle-section > h2 {
  font-size: 24px;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 14px;
}

.principle-section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background-color: var(--color-accent);
}

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

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  border-top: 3px solid var(--color-accent);
}

.principle-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.principle-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.8;
}

/* 信息说明 */
.info-boundary {
  padding: 40px 0;
}

.info-boundary-inner {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 40px;
}

.info-boundary-inner h2 {
  font-size: 22px;
  margin-bottom: 24px;
}

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

.info-boundary-item {
  padding: 20px;
  background-color: var(--color-bg);
  border-radius: var(--radius);
}

.info-boundary-item h3 {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.info-boundary-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 联系入口 */
.contact-entry {
  padding: 40px 0;
}

.contact-entry-inner {
  background-color: var(--color-dark);
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
}

.contact-entry-inner h2 {
  color: var(--color-white);
  font-size: 22px;
  margin-bottom: 12px;
}

.contact-entry-inner p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 15px;
  margin-bottom: 24px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.contact-entry-inner .entry-link {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.contact-entry-inner .entry-link:hover {
  color: var(--color-white);
  border-color: var(--color-white);
}

/* --------------------------------------------------------------------------
   合作咨询页
   -------------------------------------------------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  padding: 32px 0 48px;
  align-items: start;
}

.contact-main {
  min-width: 0;
}

/* 准备清单 */
.prep-list-section {
  padding-bottom: 40px;
}

.prep-list-section h2,
.path-section h2,
.faq-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 12px;
}

.prep-list-section h2::after,
.path-section h2::after,
.faq-section h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 36px;
  height: 3px;
  background-color: var(--color-accent);
}

.prep-list-section > p,
.path-section > p {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 20px;
  max-width: 640px;
}

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

.prep-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.prep-item h3 {
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--color-dark);
}

.prep-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 问题类型路径 */
.path-section {
  padding-bottom: 40px;
}

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

.path-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.path-card h3 {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.path-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 14px;
  flex: 1;
}

.path-card a {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
  align-self: flex-start;
}

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

/* FAQ */
.faq-section {
  padding-bottom: 20px;
}

/* 侧栏 */
.contact-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.aside-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.aside-block h2 {
  font-size: 16px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-links li {
  border-bottom: 1px dashed var(--color-line);
}

.aside-links li:last-child {
  border-bottom: none;
}

.aside-links a {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-dark);
}

.aside-links a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.aside-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}

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

/* --------------------------------------------------------------------------
   404 页面
   -------------------------------------------------------------------------- */
.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-family: var(--font-head);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-content h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}

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

.btn-primary,
.btn-secondary {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

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

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

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   响应式：移动端
   -------------------------------------------------------------------------- */
@media (max-width: 991px) {
  /* 导航 */
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background-color: var(--color-dark);
    flex-direction: column;
    padding: 12px 24px 20px;
    gap: 2px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }

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

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

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  /* 首页 */
  .hero-compare {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-cards {
    grid-column: 1;
  }

  .content-media-primary {
    grid-column: 1;
  }

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

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

  /* 内页 */
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

  .contact-aside {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .aside-block {
    flex: 1;
    min-width: 240px;
  }

  .aside-figure {
    flex: 1;
    min-width: 240px;
  }
}

@media (max-width: 767px) {
  .header-inner {
    padding: 0 16px;
    min-height: 60px;
  }

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

  .brand-tag {
    display: none;
  }

  .nav-list {
    top: 60px;
    padding: 8px 16px 16px;
  }

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

  .breadcrumb {
    padding-top: 16px;
    font-size: 12px;
  }

  .page-header {
    padding: 24px 0 16px;
  }

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

  /* 首页 */
  .hero-compare {
    padding-top: 32px;
  }

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

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

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

  .audience-card {
    padding: 20px;
  }

  .content-media-primary img {
    aspect-ratio: 16 / 9;
  }

  .capability-overview {
    padding-top: 40px;
  }

  .capability-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .compare-row {
    grid-template-columns: 1fr;
  }

  .compare-cell + .compare-cell {
    border-left: none;
    border-top: 1px solid var(--color-line);
  }

  .process-strip {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .article-item {
    flex-direction: column;
    gap: 12px;
    padding: 20px;
  }

  .article-item .status-label {
    margin-top: 0;
  }

  .cooperation-entry {
    padding: 32px 0;
  }

  .cooperation-entry .section-heading {
    padding: 0 20px;
  }

  .prepare-checklist {
    grid-template-columns: 1fr;
    padding: 0 20px 24px;
    gap: 12px;
  }

  .cooperation-entry .entry-link {
    margin-left: 20px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

  .footer-bottom {
    padding: 16px;
  }

  /* 内页通用 */
  .page-heading {
    padding-bottom: 24px;
  }

  .content-media-inline img {
    aspect-ratio: 16 / 9;
  }

  /* 业务体系 */
  .service-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service-card {
    padding: 20px;
  }

  .boundary-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .service-entry-content {
    padding: 24px 20px;
  }

  .entry-links {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }

  /* 行业方案 */
  .solution-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .solution-content {
    padding: 20px;
  }

  .guide-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .solutions .cooperation-entry {
    padding: 32px 20px;
  }

  /* 交付体系 */
  .stage-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .delivery-figure img {
    aspect-ratio: 16 / 9;
  }

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

  .checklist-item {
    flex-direction: column;
    gap: 8px;
  }

  .status-rule {
    flex-direction: column;
    gap: 8px;
  }

  /* 洞察 */
  .insight-card {
    grid-template-columns: 1fr;
  }

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

  .insight-body {
    padding: 20px;
  }

  .topic-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

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

  /* 关于我们 */
  .about-intro-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-figure img {
    aspect-ratio: 16 / 9;
  }

  .principle-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .info-boundary-inner {
    padding: 24px 20px;
  }

  .info-boundary-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .contact-entry-inner {
    padding: 32px 20px;
  }

  /* 合作咨询 */
  .contact-layout {
    gap: 24px;
  }

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

  .prep-item {
    padding: 16px 20px;
  }

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

  .contact-aside {
    flex-direction: column;
  }

  .aside-block,
  .aside-figure {
    min-width: auto;
  }

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

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

  .btn-primary,
  .btn-secondary {
    width: 100%;
    text-align: center;
  }

  /* 相关链接 */
  .related-links {
    padding: 32px 16px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}