/* ==========================================================================
   aichi5.com 整站样式表
   企业影像营销服务官网 · 米白基底 / 苔绿点缀 / 麦金强调
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base — 基础变量、重置、全局排版
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #F7F5F0;
  --color-primary: #2E6E5A;
  --color-primary-dark: #1F3A3A;
  --color-accent: #E8B45F;
  --color-text: #1F2A24;
  --color-text-light: #5A6B62;
  --color-card: #FFFFFF;
  --color-border: #E4E0D8;

  --font-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;

  --container-width: 1200px;
  --sidebar-width: 240px;
  --header-height: 72px;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(31, 42, 36, 0.08);
  --shadow-md: 0 4px 16px rgba(31, 42, 36, 0.1);
  --shadow-lg: 0 8px 32px rgba(31, 42, 36, 0.12);
}

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

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

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;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 40px;
  font-weight: 700;
}

h2 {
  font-size: 32px;
}

h3 {
  font-size: 20px;
}

p {
  margin-bottom: 1em;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-top: 8px;
}

/* 按钮基础 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 8px 0;
  transition: gap 0.2s ease, color 0.2s ease;
}

.btn-text::after {
  content: "→";
  font-size: 18px;
  line-height: 1;
  transition: transform 0.2s ease;
}

.btn-text:hover {
  color: var(--color-primary-dark);
  gap: 10px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 4px 0;
  transition: gap 0.2s ease, color 0.2s ease;
}

.text-link::after {
  content: "→";
  font-size: 18px;
  line-height: 1;
}

.text-link:hover {
  color: var(--color-primary-dark);
  gap: 10px;
}

/* --------------------------------------------------------------------------
   Layout — 全站骨架：页头、导航、面包屑、页脚、侧栏布局
   -------------------------------------------------------------------------- */

/* 页头 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background-color: rgba(247, 245, 240, 0.97);
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

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

.brand:hover .brand-name {
  color: var(--color-primary-dark);
}

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-list li {
  margin: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: rgba(46, 110, 90, 0.06);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  background-color: rgba(46, 110, 90, 0.1);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

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

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--color-text-light);
  transition: color 0.2s ease;
}

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

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

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

/* 独立面包屑导航（cases.html） */
.breadcrumb-nav {
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 12px 24px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-light);
}

.breadcrumb-list a {
  color: var(--color-text-light);
  transition: color 0.2s ease;
}

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

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

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

/* 内页布局容器 */
.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 64px;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 48px;
  align-items: start;
}

/* 侧栏在左的标准布局 */
.sidebar-left {
  grid-template-columns: var(--sidebar-width) 1fr;
}

.sidebar-left .sidebar,
.sidebar-left .sidebar-nav,
.sidebar-left .aside-nav,
.sidebar-left .page-sidebar {
  grid-column: 1;
}

.sidebar-left .inner-main {
  grid-column: 2;
}

/* 侧栏通用样式 */
.sidebar,
.sidebar-nav,
.aside-nav,
.page-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title,
.aside-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--color-primary);
}

.sidebar-list,
.aside-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-list li,
.aside-list li {
  margin: 0;
}

.sidebar-list a,
.aside-list a,
.aside-link {
  display: block;
  padding: 10px 12px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.sidebar-list a:hover,
.aside-list a:hover,
.aside-link:hover {
  color: var(--color-primary);
  background-color: rgba(46, 110, 90, 0.06);
}

.sidebar-list a.is-active,
.aside-list a.is-active,
.aside-link.is-active {
  color: var(--color-primary);
  font-weight: 600;
  background-color: rgba(46, 110, 90, 0.1);
}

/* 侧栏辅助说明 */
.aside-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.aside-note-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

/* 内页主内容 */
.inner-main {
  min-width: 0;
}

/* 内页页头 */
.page-header {
  margin-bottom: 16px;
}

.page-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

.page-head {
  margin-bottom: 32px;
}

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

.page-title-area {
  margin-bottom: 32px;
}

.page-title-inner {
  max-width: 720px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 56px 24px 24px;
  margin-top: 64px;
}

.footer-top {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  align-items: start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand-name {
  font-size: 24px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  margin: 0;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  transition: color 0.2s ease;
}

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

.footer-cta {
  display: flex;
  justify-content: flex-end;
}

.footer-cta .btn-secondary {
  border-color: rgba(255, 255, 255, 0.5);
  color: #FFFFFF;
  background: transparent;
}

.footer-cta .btn-secondary:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

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

.copyright {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Components — 通用组件：卡片、列表、FAQ、引导块
   -------------------------------------------------------------------------- */

/* 区块标题 */
.section-heading {
  margin-bottom: 32px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-sub {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 640px;
  margin: 0;
}

.section-footer-link {
  margin-top: 32px;
  text-align: center;
}

/* 服务卡片（首页） */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.service-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.service-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  flex-grow: 1;
  margin: 0;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 4px 0;
  transition: gap 0.2s ease, color 0.2s ease;
}

.card-link::after {
  content: "→";
  font-size: 16px;
  line-height: 1;
}

.card-link:hover {
  color: var(--color-primary-dark);
  gap: 10px;
}

/* 案例卡片（首页） */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

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

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

.case-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: rgba(46, 110, 90, 0.1);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

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

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

.case-card .card-link {
  padding: 0;
}

/* 案例卡片（cases.html 详情页） */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.case-figure {
  overflow: hidden;
}

.case-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.case-body {
  padding: 20px 24px 24px;
}

.case-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap 0.2s ease, color 0.2s ease;
}

.case-link::after {
  content: "→";
  font-size: 16px;
  line-height: 1;
}

.case-link:hover {
  color: var(--color-primary-dark);
  gap: 10px;
}

/* 流程步骤条（首页） */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-item {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

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

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

.step-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

/* 更新条目（首页） */
.updates-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.update-item {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.update-item:hover {
  box-shadow: var(--shadow-md);
}

.update-date {
  font-size: 13px;
  color: var(--color-text-light);
  font-family: var(--font-serif);
}

.update-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.update-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

/* 帮助入口（首页） */
.help-topics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.help-topic-card {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.help-topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.topic-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.topic-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

/* 服务详情（services.html） */
.service-detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}

.service-detail-block:last-of-type {
  border-bottom: none;
}

.service-text h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.service-lead {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.7;
}

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

.service-points {
  list-style: none;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-points li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
}

.service-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.service-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* 案例页汇总区 */
.cases-summary {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 32px;
  margin-top: 40px;
}

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

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

/* 咨询引导卡 */
.consult-card {
  background-color: var(--color-primary-dark);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 48px;
  color: #FFFFFF;
}

.consult-content,
.consult-inner {
  max-width: 720px;
}

.consult-content h2,
.consult-inner h2 {
  font-size: 24px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.consult-content p,
.consult-inner p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 20px;
}

.consult-content .btn-primary,
.consult-inner .btn-primary {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

.consult-content .btn-primary:hover,
.consult-inner .btn-primary:hover {
  background-color: #FFFFFF;
  color: var(--color-primary-dark);
}

/* 流程页（process.html） */
.process-intro {
  margin-bottom: 40px;
}

.process-hero-image {
  margin-bottom: 24px;
}

.process-hero-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.process-intro p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
}

.process-phase {
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}

.phase-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.phase-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 20px;
  font-weight: 700;
  border-radius: 50%;
  font-family: var(--font-serif);
  flex-shrink: 0;
}

.phase-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

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

.phase-goal,
.phase-actions,
.phase-prepare {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 20px;
}

.phase-goal h3,
.phase-actions h3,
.phase-prepare h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.phase-goal p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  margin: 0;
}

.phase-actions ul,
.phase-prepare ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.phase-actions li,
.phase-prepare li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.phase-actions li::before,
.phase-prepare li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.phase-image {
  margin-top: 24px;
}

.phase-image img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.process-note {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 32px;
  margin-top: 32px;
}

.process-note h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.process-note p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin: 0;
}

.contact-guide {
  background-color: var(--color-primary-dark);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 40px;
  color: #FFFFFF;
}

.contact-guide h2,
.contact-guide .section-title {
  font-size: 24px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.contact-guide p,
.contact-guide-text {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 20px;
}

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

.guide-links .btn-primary {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

.guide-links .btn-primary:hover {
  background-color: #FFFFFF;
}

.guide-links .btn-secondary {
  border-color: rgba(255, 255, 255, 0.5);
  color: #FFFFFF;
}

.guide-links .btn-secondary:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

/* 相关链接 */
.related-links {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

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

.related-links-item {
  font-size: 14px;
  color: var(--color-primary);
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--color-primary);
  background-color: rgba(46, 110, 90, 0.06);
}

/* 更新页（updates.html） */
.updates-section {
  margin-bottom: 48px;
}

.updates-section .section-title,
.views-section .section-title,
.reviews-section .section-title,
.progress-section .section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

.updates-section .update-item {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  margin-bottom: 16px;
}

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

.update-image {
  width: 100%;
  height: 140px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.update-item:hover .update-image {
  transform: scale(1.03);
}

.update-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.update-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-light);
}

.update-date {
  font-family: var(--font-serif);
}

.update-category {
  display: inline-block;
  background-color: rgba(46, 110, 90, 0.1);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
}

.update-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.update-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

.update-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 4px 0;
  transition: gap 0.2s ease, color 0.2s ease;
}

.update-link::after {
  content: "→";
  font-size: 16px;
  line-height: 1;
}

.update-link:hover {
  color: var(--color-primary-dark);
  gap: 10px;
}

/* 观点 / 复盘 / 进展列表 */
.views-list,
.reviews-list,
.progress-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.views-item,
.reviews-item,
.progress-item {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.views-title,
.reviews-title,
.progress-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.views-text,
.reviews-text,
.progress-text {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

/* 更新页联系入口 */
.contact-guide-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-accent);
  padding: 8px 0;
  transition: gap 0.2s ease, color 0.2s ease;
}

.contact-guide-link::after {
  content: "→";
  font-size: 18px;
  line-height: 1;
}

.contact-guide-link:hover {
  color: #FFFFFF;
  gap: 10px;
}

/* 帮助页（help.html） */
.faq-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 32px;
  margin-bottom: 40px;
}

.faq-hero-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

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

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

.faq-section h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.faq-section .section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.faq-item {
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

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

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

.faq-item[open] summary {
  color: var(--color-primary);
  background-color: rgba(46, 110, 90, 0.04);
}

.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-item summary:hover {
  background-color: rgba(46, 110, 90, 0.04);
}

.faq-answer {
  padding: 0 20px 16px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 8px;
}

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

/* 反馈准备区 */
.feedback-guide {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 32px;
  margin-top: 40px;
}

.feedback-guide h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.feedback-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 20px;
}

.feedback-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.feedback-card p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 8px;
}

.feedback-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}

.feedback-card a::after {
  content: "→";
}

.feedback-card a:hover {
  gap: 8px;
}

/* 帮助页底部 CTA */
.help-cta {
  background-color: var(--color-primary-dark);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 40px;
  text-align: center;
  color: #FFFFFF;
}

.help-cta h2 {
  font-size: 24px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.help-cta p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
}

.help-cta .btn-primary {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  margin-right: 12px;
}

.help-cta .btn-primary:hover {
  background-color: #FFFFFF;
}

.help-cta .btn-secondary {
  border-color: rgba(255, 255, 255, 0.5);
  color: #FFFFFF;
}

.help-cta .btn-secondary:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

/* 404 页 */
.error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.error-content {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-serif);
  line-height: 1.1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

.error-help {
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-text-light);
}

.error-help a {
  color: var(--color-primary);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Pages — 首页专属模块
   -------------------------------------------------------------------------- */

/* Hero 区 */
.hero {
  padding: 48px 0 24px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  margin: 0;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin: 0;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.hero-service-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.hero-service-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background-color: var(--color-card);
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.hero-service-links a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: rgba(46, 110, 90, 0.06);
}

.hero-media {
  position: relative;
}

.hero-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

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

/* Hero 下方案例缩略横条 */
.hero-case-strip {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.case-thumb-link {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.case-thumb-link:hover {
  background-color: rgba(46, 110, 90, 0.06);
}

.case-thumb-link img {
  width: 72px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.case-thumb-link span {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
}

.case-strip-note {
  font-size: 13px;
  color: var(--color-text-light);
  white-space: nowrap;
  flex-shrink: 0;
}

/* 首页各区块通用间距 */
.services-section,
.cases-preview,
.process-overview,
.updates-preview,
.help-entry {
  padding: 48px 0;
}

.help-entry {
  padding-bottom: 64px;
}

.cases-preview,
.process-overview,
.help-entry {
  border-top: 1px solid var(--color-border);
}

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

/* 1024px 平板 */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }

  .page-layout {
    padding: 32px 20px 48px;
    gap: 32px;
  }

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

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

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

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

/* 768px 手机横屏 / 小平板 */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 26px;
  }

  /* 汉堡菜单 */
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    display: block;
    visibility: visible;
    opacity: 1;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 16px;
  }

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

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

  .nav-link {
    display: flex;
    width: 100%;
    padding: 12px 8px;
    border-bottom: 1px solid rgba(228, 224, 216, 0.6);
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  /* 布局切换为单列 */
  .page-layout,
  .sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar-left .sidebar,
  .sidebar-left .sidebar-nav,
  .sidebar-left .aside-nav,
  .sidebar-left .page-sidebar,
  .sidebar-left .inner-main {
    grid-column: 1;
  }

  /* 手机端正文优先，侧栏下移 */
  .sidebar-left .inner-main {
    grid-row: 1;
  }

  .sidebar-left .sidebar,
  .sidebar-left .sidebar-nav,
  .sidebar-left .aside-nav,
  .sidebar-left .page-sidebar {
    grid-row: 2;
    position: static;
  }

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

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

  /* 首页模块 */
  .hero {
    padding: 32px 0 24px;
  }

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

  .hero-figure img {
    height: 260px;
  }

  .hero-case-strip {
    flex-wrap: wrap;
  }

  .case-thumb-link {
    flex: 0 0 calc(33.333% - 12px);
  }

  .case-strip-note {
    width: 100%;
    text-align: center;
    white-space: normal;
  }

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

  .help-topics {
    grid-template-columns: 1fr;
  }

  .service-detail-block {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .updates-section .update-item {
    grid-template-columns: 1fr;
  }

  .update-media {
    height: 180px;
  }

  .update-media img {
    height: 100%;
  }

  .views-list,
  .reviews-list,
  .progress-list {
    grid-template-columns: 1fr;
  }

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

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

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

  .footer-cta {
    justify-content: flex-start;
  }
}

/* 480px 手机竖屏 */
@media (max-width: 480px) {
  .header-inner {
    padding: 0 16px;
  }

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

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

  .page-layout {
    padding: 24px 16px 40px;
  }

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

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .hero-figure img {
    height: 200px;
  }

  .hero-service-links {
    flex-direction: column;
  }

  .hero-service-links a {
    text-align: center;
  }

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

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

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

  .case-thumb-link {
    flex: 0 0 100%;
  }

  .service-detail-block {
    padding: 24px 0;
  }

  .service-figure img {
    height: 200px;
  }

  .consult-card {
    padding: 24px;
  }

  .process-phase {
    padding: 24px 0;
  }

  .phase-number {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .phase-header h2 {
    font-size: 20px;
  }

  .contact-guide {
    padding: 24px;
  }

  .guide-links {
    flex-direction: column;
  }

  .guide-links .btn-primary,
  .guide-links .btn-secondary {
    width: 100%;
  }

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

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

  .footer-top {
    gap: 20px;
  }
}

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}