/* ==========================================================================
   51吃瓜视频 · 整站样式表
   视觉方向：社区市集风企业服务官网
   配色：深蓝主色 + 橙/青/绿/紫分类标签 + 暖灰底
   ========================================================================== */

/* ==========================================================================
   Base — 基础变量、重置与全局排版
   ========================================================================== */

:root {
  /* 品牌主色 */
  --c-primary: #0F2B46;
  --c-primary-light: #1C3A5C;
  --c-primary-dark: #0A1E30;

  /* 分类标签色 */
  --c-orange: #F5A623;
  --c-orange-deep: #E86A33;
  --c-cyan: #1B9AAA;
  --c-green: #4C9F70;
  --c-purple: #7A6FF0;

  /* 中性色 */
  --c-bg: #F7F4EF;
  --c-text: #1C2733;
  --c-text-light: #5A6B7A;
  --c-border: #E4DED5;
  --c-white: #FFFFFF;

  /* 字体 */
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-num: "DIN Alternate", system-ui, sans-serif;

  /* 布局 */
  --container-w: 1200px;
  --content-w: 760px;
  --radius: 8px;
  --radius-sm: 4px;

  /* 过渡 */
  --t-fast: 0.2s ease;
  --t-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--c-orange-deep);
}

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 28px;
  line-height: 1.35;
}

h2 {
  font-size: 22px;
  line-height: 1.4;
}

h3 {
  font-size: 17px;
  line-height: 1.45;
}

p {
  margin-bottom: 0.9em;
}

p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Layout — 全站骨架：页头、页脚、容器、主区域
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--c-bg);
}

.site-header {
  background-color: var(--c-primary);
  border-bottom: 3px solid var(--c-orange);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}

.brand-link {
  display: flex;
  flex-direction: column;
  color: var(--c-white);
  line-height: 1.25;
  flex-shrink: 0;
}

.brand-link:hover {
  color: var(--c-white);
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-white);
}

.brand-slogan {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.4px;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: background var(--t-fast), color var(--t-fast);
}

.nav-link:hover {
  color: var(--c-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.is-current {
  color: var(--c-white);
  font-weight: 700;
  background-color: rgba(255, 255, 255, 0.14);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--c-white);
  border-radius: 2px;
  transition: transform var(--t-fast), opacity var(--t-fast);
}

/* 页脚 */
.site-footer {
  background-color: var(--c-primary);
  color: rgba(255, 255, 255, 0.75);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.footer-brand-name {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 6px;
}

.footer-slogan {
  font-size: 14px;
  color: var(--c-orange);
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
  max-width: 360px;
}

.footer-col h3 {
  font-size: 15px;
  color: var(--c-white);
  margin-bottom: 14px;
}

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

.footer-col a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-col a:hover {
  color: var(--c-orange);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

/* 主容器 */
.site-main {
  flex: 1;
  width: 100%;
}

.home-main {
  background-color: var(--c-bg);
}

.inner-main {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 4px;
  font-size: 13px;
  color: var(--c-text-light);
}

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

.breadcrumb a:hover {
  color: var(--c-orange-deep);
}

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

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

/* 页面标题区 */
.page-header {
  padding: 20px 0 24px;
}

.page-header .page-title {
  font-size: 28px;
  color: var(--c-primary);
}

.page-title-area {
  padding: 12px 0 28px;
}

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

/* 通用 section 标题 */
.section-head {
  text-align: center;
  margin-bottom: 36px;
}

.section-head h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.section-head p {
  font-size: 14px;
  color: var(--c-text-light);
  max-width: 560px;
  margin: 0 auto;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--c-primary);
  border-color: var(--c-primary);
}

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

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

.btn-light:hover {
  background-color: var(--c-orange);
  color: var(--c-primary);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--c-white);
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline-light:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--c-white);
}

/* 相关链接条 */
.related-links {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 20px 24px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
}

.related-links-label {
  color: var(--c-text-light);
  margin-right: 4px;
}

.related-links-item {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  color: var(--c-text-light);
  background-color: var(--c-white);
  transition: border-color var(--t-fast), color var(--t-fast);
}

.related-links-item:hover {
  border-color: var(--c-orange-deep);
  color: var(--c-orange-deep);
}

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

/* 图片容器统一约束 */
figure {
  margin: 0;
}

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

figcaption {
  padding: 10px 0 0;
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.6;
}

/* FAQ 折叠项 */
.faq-item {
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 0;
  margin-bottom: 12px;
  overflow: hidden;
}

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

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--c-orange-deep);
  flex-shrink: 0;
  transition: transform var(--t-normal);
}

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

.faq-item summary:hover {
  background-color: var(--c-bg);
}

.faq-item p {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.75;
}

/* CTA 通栏 */
.cta-section,
.cta-banner,
.cta,
.cta-block,
.process-cta {
  background-color: var(--c-primary);
  padding: 48px 24px;
  margin: 48px 0 0;
}

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

.cta-inner h2,
.cta-content h2,
.cta-banner h2,
.cta-block h2,
.process-cta h2 {
  color: var(--c-white);
  font-size: 24px;
  margin-bottom: 10px;
}

.cta-inner p,
.cta-content p,
.cta-banner p,
.cta-block p,
.process-cta p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto 24px;
}

.cta-actions,
.cta-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.cta-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 12px;
}

/* 卡片通用 */
.service-card,
.doc-card,
.delivery-card,
.category-card,
.responsibility-card,
.principle-card,
.boundary-item,
.audience-card,
.progress-item,
.material-item,
.support-card {
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

/* 彩色标签 */
.tag,
.service-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-white);
}

.tag-orange,
.service-tag-orange {
  background-color: var(--c-orange);
}

.tag-cyan,
.service-tag-cyan {
  background-color: var(--c-cyan);
}

.tag-green,
.service-tag-green {
  background-color: var(--c-green);
}

.tag-purple,
.service-tag-purple {
  background-color: var(--c-purple);
}

/* ==========================================================================
   Components — 首页模块
   ========================================================================== */

/* Hero */
.hero-section {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 32px;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--c-text-light);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-media {
  position: relative;
}

.hero-figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
  background-color: var(--c-white);
}

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

.hero-figure figcaption {
  padding: 12px 16px;
}

/* 服务分类市集 */
.service-categories {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px;
}

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

.service-categories .service-card {
  overflow: hidden;
  transition: transform var(--t-normal), box-shadow var(--t-normal);
}

.service-categories .service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.1);
}

.service-categories .card-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.service-categories .card-media img {
  transition: transform var(--t-normal);
}

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

.service-categories .service-card .tag {
  margin: 16px 16px 0;
}

.service-categories .service-card h3 {
  padding: 10px 16px 0;
  font-size: 18px;
}

.service-categories .service-card p {
  padding: 8px 16px 0;
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.65;
}

.service-categories .card-link {
  display: inline-block;
  padding: 12px 16px 16px;
  font-size: 13px;
  font-weight: 600;
}

/* 快速开始三步 */
.quick-start {
  background-color: var(--c-white);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 48px 24px;
}

.quick-steps {
  max-width: var(--container-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-item {
  text-align: center;
  padding: 20px 16px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-num);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
}

.quick-start .step-item h3 {
  margin-bottom: 8px;
}

.quick-start .step-item p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.7;
  max-width: 260px;
  margin: 0 auto;
}

/* 资料索引 */
.doc-index {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px;
}

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

.doc-card {
  padding: 28px 24px;
  transition: transform var(--t-normal), box-shadow var(--t-normal);
}

.doc-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.1);
}

.doc-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

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

.doc-card .card-link {
  font-size: 14px;
  font-weight: 600;
}

/* 交付版本信息条 */
.delivery-note {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px;
}

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

.delivery-item {
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}

.delivery-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--c-orange-deep);
}

.delivery-item p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.65;
}

/* FAQ 预览 */
.faq-preview {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
  max-width: 960px;
  margin: 0 auto;
}

.faq-more {
  text-align: center;
  margin-top: 28px;
}

/* 首页 CTA */
.home-main .cta-section {
  margin: 0;
}

.home-main .cta-inner {
  max-width: var(--container-w);
}

/* ==========================================================================
   Components — 内页共用模块
   ========================================================================== */

/* 内页 CTA（services 页） */
.cta-banner {
  margin: 48px 0 0;
  border-radius: var(--radius);
}

/* 内页通用 CTA */
.inner-main .cta,
.inner-main .cta-section,
.inner-main .cta-block,
.inner-main .process-cta {
  margin: 48px 0 0;
  border-radius: var(--radius);
}

/* 内页相关链接 */
.inner-main ~ .related-links,
.site-main ~ .related-links {
  margin-top: 0;
}

/* ==========================================================================
   Pages — 服务项目页
   ========================================================================== */

.page-services .service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 48px;
}

.page-services .service-card {
  overflow: hidden;
  transition: transform var(--t-normal), box-shadow var(--t-normal);
}

.page-services .service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.1);
}

.page-services .service-card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-services .service-tag {
  margin: 16px 20px 0;
}

.page-services .service-card-title {
  padding: 10px 20px 0;
  font-size: 19px;
}

.page-services .service-card-desc {
  padding: 8px 20px 0;
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.7;
}

.page-services .service-card-link {
  display: inline-block;
  padding: 12px 20px 18px;
  font-size: 14px;
  font-weight: 600;
}

/* 主内容 + 侧栏布局 */
.layout-shell {
  width: 100%;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

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

/* 服务详情 */
.service-detail {
  margin-bottom: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--c-border);
}

.service-detail:last-child {
  border-bottom: none;
}

.service-detail h2 {
  font-size: 22px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-orange);
}

.detail-block {
  margin-bottom: 20px;
}

.detail-block h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--c-primary);
}

.detail-block p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.75;
}

/* 侧栏 */
.sidebar-support {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 88px;
}

.support-card {
  padding: 24px 20px;
}

.support-card h3 {
  font-size: 16px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
}

.support-list li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--c-text-light);
  border-bottom: 1px dashed var(--c-border);
}

.support-list li:last-child {
  border-bottom: none;
}

.support-list a {
  font-size: 14px;
  color: var(--c-text-light);
}

.support-list a:hover {
  color: var(--c-orange-deep);
}

/* ==========================================================================
   Pages — 制作流程页
   ========================================================================== */

.page-process .page-title-block {
  padding: 12px 0 8px;
}

/* 流程总览 */
.process-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 24px 0 40px;
}

.process-intro-text h2 {
  margin-bottom: 16px;
}

.process-intro-text p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.8;
  margin-bottom: 12px;
}

.process-intro-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
}

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

/* 阶段组 */
.stage-groups {
  padding: 24px 0 40px;
}

.stage-groups > h2 {
  text-align: center;
  margin-bottom: 36px;
}

.stage-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--c-border);
}

.stage-block:last-child {
  border-bottom: none;
}

.stage-info {
  padding-right: 24px;
}

.stage-number {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-white);
  background-color: var(--c-orange-deep);
  padding: 4px 12px;
  border-radius: 3px;
  margin-bottom: 12px;
}

.stage-info h3 {
  font-size: 19px;
  margin-bottom: 12px;
}

.stage-info p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.75;
  margin-bottom: 10px;
}

.stage-action h4 {
  font-size: 15px;
  color: var(--c-primary);
  margin-bottom: 10px;
}

.stage-action ul {
  margin-bottom: 16px;
}

.stage-action li {
  font-size: 14px;
  color: var(--c-text-light);
  padding: 4px 0 4px 18px;
  position: relative;
  line-height: 1.65;
}

.stage-action li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--c-cyan);
}

.stage-action p {
  font-size: 14px;
  color: var(--c-text-light);
  background-color: var(--c-bg);
  border-left: 3px solid var(--c-green);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 素材清单 */
.material-checklist {
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  margin: 16px 0 40px;
}

.material-checklist > h2 {
  text-align: center;
  margin-bottom: 8px;
}

.checklist-intro {
  text-align: center;
  font-size: 14px;
  color: var(--c-text-light);
  margin-bottom: 28px;
}

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

.checklist-item {
  background-color: var(--c-bg);
  border-radius: var(--radius);
  padding: 24px 20px;
}

.checklist-item h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--c-primary);
}

.checklist-item li {
  font-size: 14px;
  color: var(--c-text-light);
  padding: 5px 0;
  line-height: 1.6;
}

/* 交付说明 */
.process-page .delivery-note {
  padding: 24px 0 40px;
}

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

.delivery-card {
  padding: 28px 24px;
}

.delivery-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--c-orange-deep);
}

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

/* 流程 CTA */
.process-cta {
  margin: 16px 0 0;
}

/* ==========================================================================
   Pages — 服务支持页
   ========================================================================== */

.page-support .page-title {
  margin-bottom: 8px;
}

.page-support .page-title + p {
  font-size: 15px;
  color: var(--c-text-light);
}

/* 政策 */
.policy-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 24px 0 40px;
}

.policy-content h2 {
  margin-bottom: 14px;
}

.policy-content p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.75;
  margin-bottom: 16px;
}

.policy-list li {
  font-size: 14px;
  color: var(--c-text-light);
  padding: 8px 0 8px 22px;
  position: relative;
  line-height: 1.65;
  border-bottom: 1px dashed var(--c-border);
}

.policy-list li:last-child {
  border-bottom: none;
}

.policy-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 8px;
  color: var(--c-green);
  font-weight: 700;
}

.policy-image {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
}

.policy-image img {
  aspect-ratio: 4 / 3;
}

/* 问题分类 */
.problem-categories {
  padding: 24px 0 40px;
}

.problem-categories > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.category-card {
  padding: 24px 20px;
  transition: transform var(--t-normal), box-shadow var(--t-normal);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.08);
}

.category-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--c-primary);
}

.category-card p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.7;
}

/* 处理流程 */
.process-steps {
  padding: 24px 0 40px;
}

.process-steps > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.support-page .step-item {
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: left;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-num);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.support-page .step-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.support-page .step-item p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.65;
}

/* 资料交付 */
.material-list {
  padding: 24px 0 40px;
}

.material-list > h2 {
  text-align: center;
  margin-bottom: 8px;
}

.material-list > p {
  text-align: center;
  font-size: 14px;
  color: var(--c-text-light);
  margin-bottom: 28px;
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

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

.material-item h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.material-item p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.65;
}

/* 进度说明 */
.progress-note {
  padding: 24px 0 32px;
}

.progress-note > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.progress-item {
  padding: 24px 20px;
}

.progress-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--c-cyan);
}

.progress-item p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.65;
}

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

.page-faq .page-title {
  margin-bottom: 8px;
}

.page-faq .page-title + p {
  font-size: 15px;
  color: var(--c-text-light);
}

.intro-image {
  padding: 8px 0 32px;
}

.intro-image figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
}

.intro-image img {
  aspect-ratio: 21 / 8;
  width: 100%;
}

.intro-image figcaption {
  padding: 12px 16px;
  background-color: var(--c-white);
}

.faq-groups {
  padding: 0 0 24px;
}

.faq-group {
  margin-bottom: 32px;
}

.faq-group h2 {
  font-size: 19px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--c-orange);
}

.faq-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
}

.faq-list .faq-item {
  margin-bottom: 0;
}

/* ==========================================================================
   Pages — 服务顾问页
   ========================================================================== */

.page-advisors .page-title-area {
  padding: 8px 0 24px;
}

/* 角色卡 */
.role-card-section {
  padding: 0 0 40px;
}

.role-card {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.role-card-media {
  min-height: 280px;
}

.role-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.role-card-content {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.role-card-content h2 {
  margin-bottom: 14px;
}

.role-card-content p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.75;
  margin-bottom: 12px;
}

/* 职责 */
.responsibility-section {
  padding: 24px 0 40px;
}

.responsibility-section > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.responsibility-card {
  padding: 24px 20px;
  transition: transform var(--t-normal), box-shadow var(--t-normal);
}

.responsibility-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.08);
}

.resp-number {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-purple);
  margin-bottom: 10px;
}

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

.responsibility-card p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.65;
}

/* 协作观点 */
.perspective-section {
  padding: 24px 0 40px;
}

.perspective-section > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.perspective-item {
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.perspective-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-white);
  background-color: var(--c-cyan);
  padding: 3px 12px;
  border-radius: 3px;
  margin-bottom: 14px;
}

.perspective-item h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.perspective-item p {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.7;
}

/* 关联服务 */
.related-deliverables-section {
  padding: 24px 0 40px;
}

.related-deliverables-section > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.related-card {
  display: block;
  background-color: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: transform var(--t-normal), box-shadow var(--t-normal), border-color var(--t-fast);
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.1);
  border-color: var(--c-orange);
}

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

.related-card p {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.65;
  margin-bottom: 12px;
}

.related-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-orange-deep);
}

/* ==========================================================================
   Pages — 关于我们页
   ========================================================================== */

.page-about .page-title-area {
  padding: 8px 0 24px;
}

/* 团队图 */
.team-image-block {
  padding: 0 0 32px;
}

.team-figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
}

.team-photo {
  width: 100%;
  aspect-ratio: 21 / 8;
  object-fit: cover;
}

.team-figure figcaption {
  padding: 12px 16px;
  background-color: var(--c-white);
}

/* 定位 */
.position-block {
  padding: 24px 0 32px;
  max-width: 840px;
}

.position-block h2 {
  margin-bottom: 14px;
}

.position-block p {
  font-size: 15px;
  color: var(--c-text-light);
  line-height: 1.85;
  margin-bottom: 14px;
}

/* 工作原则 */
.principles-block {
  padding: 24px 0 40px;
}

.principles-block > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.principle-card {
  padding: 28px 24px;
  transition: transform var(--t-normal), box-shadow var(--t-normal);
}

.principle-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.08);
}

.principle-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--c-orange-deep);
}

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

/* 合作边界 */
.boundary-block {
  padding: 24px 0 40px;
}

.boundary-block > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.boundary-item {
  padding: 24px 20px;
  border-left: 4px solid var(--c-orange-deep);
}

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

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

/* 适合企业 */
.audience-block {
  padding: 24px 0 40px;
}

.audience-block > h2 {
  text-align: center;
  margin-bottom: 28px;
}

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

.audience-card {
  padding: 28px 24px;
}

.audience-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: var(--c-cyan);
}

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

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-content {
  text-align: center;
  max-width: 480px;
}

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

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

.error-desc {
  font-size: 15px;
  color: var(--c-text-light);
  margin-bottom: 8px;
}

.error-tip {
  font-size: 14px;
  color: var(--c-text-light);
  margin-bottom: 24px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: var(--c-primary);
  color: var(--c-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background var(--t-fast);
}

.error-btn:hover {
  background-color: var(--c-primary-light);
  color: var(--c-white);
}

/* ==========================================================================
   Responsive — 响应式布局
   ========================================================================== */

/* 平板 */
@media (max-width: 992px) {
  .service-categories .service-grid,
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 28px;
  }
}

/* 手机端 */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 60px;
  }

  .brand-name {
    font-size: 17px;
  }

  .brand-slogan {
    font-size: 11px;
  }

  /* 导航切换 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    order: 3;
  }

  .site-nav .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--c-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    padding: 8px 0;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 14px 24px;
    border-radius: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-link.is-current {
    background-color: rgba(255, 255, 255, 0.1);
  }

  .site-header {
    position: relative;
  }

  /* Hero */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 36px 16px 28px;
  }

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

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

  .hero-actions .btn {
    width: 100%;
  }

  /* 首页模块 */
  .service-categories,
  .quick-start,
  .doc-index,
  .delivery-note,
  .faq-preview {
    padding: 36px 16px;
  }

  .service-categories .service-grid,
  .doc-cards,
  .quick-steps,
  .delivery-items,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .quick-steps {
    gap: 8px;
  }

  .step-item {
    padding: 16px 12px;
  }

  /* 内页 */
  .inner-main {
    padding: 0 16px 48px;
  }

  .page-header {
    padding: 16px 0 20px;
  }

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

  .breadcrumb {
    padding: 16px 0 0;
  }

  /* services 页 */
  .page-services .service-grid {
    grid-template-columns: 1fr;
  }

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

  .sidebar-support {
    position: static;
    margin-top: 32px;
  }

  /* process 页 */
  .process-intro {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .stage-info {
    padding-right: 0;
  }

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

  /* support 页 */
  .policy-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .category-grid,
  .steps-row,
  .progress-grid {
    grid-template-columns: 1fr;
  }

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

  /* faq 页 */
  .faq-list {
    grid-template-columns: 1fr;
  }

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

  /* advisors 页 */
  .role-card {
    grid-template-columns: 1fr;
  }

  .role-card-media {
    min-height: 200px;
  }

  .role-card-content {
    padding: 24px 20px;
  }

  .responsibility-grid,
  .perspective-list {
    grid-template-columns: 1fr;
  }

  /* about 页 */
  .principles-grid,
  .boundary-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .team-photo {
    aspect-ratio: 16 / 9;
  }

  /* CTA */
  .cta-section,
  .cta-banner,
  .cta,
  .cta-block,
  .process-cta {
    padding: 40px 16px;
  }

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

  .cta-actions .btn {
    width: 100%;
  }

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

  .footer-desc {
    max-width: none;
  }

  .related-links {
    padding: 16px 16px 32px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  .hero-content h1 {
    font-size: 23px;
  }

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

  .service-categories .service-grid,
  .doc-cards,
  .delivery-items {
    grid-template-columns: 1fr;
  }

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

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

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

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

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

/* ==========================================================================
   Accessibility — 可访问性与动效
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 聚焦可见性 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--c-orange-deep);
  outline-offset: 2px;
}

/* 卡片 hover 上浮动效（不影响初始可见性） */
@media (hover: hover) {
  .service-card,
  .doc-card,
  .category-card,
  .responsibility-card,
  .related-card,
  .principle-card {
    transition: transform var(--t-normal), box-shadow var(--t-normal);
  }
}