/* ============================================================
   base — 基础变量、重置与全局样式
   ============================================================ */
:root {
  --primary: #2F4F4F;
  --primary-dark: #243E3E;
  --primary-light: #3D6363;
  --accent: #8B4513;
  --accent-light: #A05A22;
  --bg-light: #F5F5F5;
  --bg-white: #FFFFFF;
  --text-dark: #333333;
  --text-mid: #555555;
  --text-light: #777777;
  --border: #E0E0E0;
  --border-light: #EDEDED;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.12);
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --transition: 0.25s ease;
}

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

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

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-white);
}

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

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  margin-bottom: 36px;
}

.section-header .subtitle {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.section-header h2 {
  font-size: 28px;
  line-height: 1.3;
  color: var(--primary-dark);
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-mid);
  font-size: 15px;
  max-width: 640px;
}

/* ============================================================
   layout — 页面整体布局、头部、导航、页脚
   ============================================================ */
.site-header {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-dark);
}

.logo-text span {
  color: var(--accent);
}

.logo-tagline {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 2px;
}

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

.main-nav a {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-mid);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.main-nav a:hover {
  color: var(--primary);
  background-color: rgba(47, 79, 79, 0.06);
}

.main-nav a.active {
  color: var(--primary);
  font-weight: 600;
  background-color: rgba(47, 79, 79, 0.08);
}

.nav-cta {
  margin-left: 12px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--primary-dark);
  margin: 3px 0;
  transition: all var(--transition);
}

.site-footer {
  background-color: var(--primary-dark);
  color: rgba(255, 255, 255, 0.85);
  margin-top: 80px;
}

.footer-top {
  padding: 56px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.65);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================================
   components — 按钮、卡片、表单、面包屑、FAQ等通用组件
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  min-height: 44px;
}

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

.btn-primary:hover {
  background-color: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 1.5px solid var(--primary);
  color: var(--primary);
  background-color: transparent;
}

.btn-outline:hover {
  background-color: var(--primary);
  color: #fff;
}

.btn-accent {
  background-color: var(--accent);
  color: #fff;
}

.btn-accent:hover {
  background-color: var(--accent-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 24px;
}

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

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

.breadcrumb .sep {
  color: #bbb;
}

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

/* 服务卡片 */
.service-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all var(--transition);
  height: 100%;
}

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

.service-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background-color: rgba(47, 79, 79, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.service-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--primary);
}

.service-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.6;
}

/* 案例卡片 */
.case-card {
  background-color: var(--bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  height: 100%;
}

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

.case-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.case-card:hover .case-thumb img {
  transform: scale(1.04);
}

.case-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background-color: rgba(47, 79, 79, 0.9);
  color: #fff;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 20px;
}

.case-body {
  padding: 20px;
}

.case-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.case-body p {
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.6;
}

/* 流程步骤 */
.step-item {
  display: flex;
  gap: 20px;
  position: relative;
}

.step-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}

.step-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 6px;
}

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

/* FAQ手风琴 */
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  background-color: var(--bg-white);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary-dark);
  text-align: left;
  gap: 16px;
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: rgba(47, 79, 79, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  transition: transform var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.7;
}

/* 表单 */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-mid);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text-dark);
  background-color: var(--bg-white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47, 79, 79, 0.1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* ============================================================
   pages — 首页与内页特有样式
   ============================================================ */
/* 首页 hero */
.hero {
  background-color: var(--bg-light);
  border-bottom: 1px solid var(--border-light);
  padding: 72px 0 64px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-content .hero-tag {
  display: inline-block;
  background-color: rgba(139, 69, 19, 0.1);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.3;
  color: var(--primary-dark);
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-content h1 em {
  color: var(--accent);
  font-style: normal;
}

.hero-content p {
  font-size: 16px;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 520px;
}

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

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
}

.hero-stat {
  text-align: left;
}

.hero-stat strong {
  display: block;
  font-size: 24px;
  color: var(--primary);
  font-weight: 700;
}

.hero-stat span {
  font-size: 13px;
  color: var(--text-light);
}

.hero-media {
  position: relative;
}

.hero-media img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  width: 100%;
}

/* 首页服务矩阵 */
.section {
  padding: 64px 0;
}

.section-alt {
  background-color: var(--bg-light);
}

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

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

/* 首页流程 */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
}

.steps-grid .step-item {
  flex-direction: column;
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
}

.steps-grid .step-item:hover {
  box-shadow: var(--shadow-hover);
}

/* 首页资讯 */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.insight-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
}

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

.insight-card .meta {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 10px;
}

.insight-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.insight-card p {
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.6;
}

/* 首页 CTA 区域 */
.cta-section {
  background-color: var(--primary);
  padding: 56px 0;
}

.cta-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-text h2 {
  font-size: 24px;
  color: #fff;
  margin-bottom: 8px;
}

.cta-text p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
}

/* 内页通用 */
.page-main {
  padding: 48px 0 64px;
}

.page-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}

.page-sidebar {
  position: sticky;
  top: 96px;
}

.sidebar-nav {
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.sidebar-nav a {
  display: block;
  padding: 12px 20px;
  font-size: 14px;
  color: var(--text-mid);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition);
}

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

.sidebar-nav a:hover {
  background-color: rgba(47, 79, 79, 0.05);
  color: var(--primary);
}

.sidebar-nav a.active {
  background-color: var(--primary);
  color: #fff;
}

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

.page-content h1 {
  font-size: 28px;
  color: var(--primary-dark);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.page-content h2 {
  font-size: 22px;
  color: var(--primary-dark);
  font-weight: 600;
  margin: 32px 0 16px;
  line-height: 1.4;
}

.page-content h3 {
  font-size: 17px;
  color: var(--primary-dark);
  font-weight: 600;
  margin: 24px 0 12px;
}

.page-content p {
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-content ul,
.page-content ol {
  margin: 0 0 16px 20px;
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.8;
}

.page-content ul li,
.page-content ol li {
  margin-bottom: 6px;
}

.page-content ul li::marker {
  color: var(--accent);
}

/* 关于页 */
.about-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}

.about-block img {
  border-radius: var(--radius-md);
  width: 100%;
}

.values-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin: 32px 0;
}

.value-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
}

.value-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--primary-dark);
}

.value-item p {
  font-size: 14px;
  margin-bottom: 0;
}

/* 服务详情页 */
.feature-detail {
  margin-bottom: 32px;
}

.feature-detail-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.feature-detail-item {
  background-color: var(--bg-light);
  border-radius: var(--radius-md);
  padding: 20px;
}

.feature-detail-item h4 {
  font-size: 15px;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.feature-detail-item p {
  font-size: 14px;
  margin-bottom: 0;
}

/* 流程页 */
.process-timeline {
  position: relative;
  padding-left: 32px;
}

.process-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--border);
}

.process-timeline .step-item {
  position: relative;
  margin-bottom: 32px;
}

.process-timeline .step-num {
  position: absolute;
  left: -32px;
  top: 0;
}

/* 资讯列表 */
.article-list {
  display: grid;
  gap: 24px;
}

.article-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: all var(--transition);
}

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

.article-item img {
  width: 120px;
  height: 90px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

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

.article-content .meta {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.article-content p {
  font-size: 14px;
  margin-bottom: 0;
}

/* 联系页 */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-form-wrap {
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
}

.contact-info-list {
  margin-top: 24px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 20px;
  padding: 16px;
  background-color: var(--bg-light);
  border-radius: var(--radius-md);
}

.contact-info-item .icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: rgba(47, 79, 79, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 18px;
}

.contact-info-item h4 {
  font-size: 15px;
  color: var(--primary-dark);
  margin-bottom: 4px;
}

.contact-info-item p {
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 0;
}

/* ============================================================
   responsive — 响应式适配
   ============================================================ */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

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

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

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

  .hero-inner {
    gap: 32px;
  }

  .hero-content h1 {
    font-size: 30px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    display: none;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    padding: 12px 16px;
    font-size: 16px;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 12px;
  }

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

  .hero {
    padding: 48px 0 40px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .hero-media {
    order: -1;
  }

  .section {
    padding: 48px 0;
  }

  .services-grid,
  .cases-grid,
  .insights-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

  .page-sidebar {
    position: static;
    margin-bottom: 24px;
  }

  .sidebar-nav {
    display: flex;
    overflow-x: auto;
    border: none;
    background: none;
    gap: 8px;
  }

  .sidebar-nav a {
    flex-shrink: 0;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    background-color: var(--bg-white);
  }

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

  .values-list,
  .feature-detail-list {
    grid-template-columns: 1fr;
  }

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

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

  .article-item img {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
  }

  .cta-inner {
    flex-direction: column;
    text-align: center;
  }

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

  .footer-top {
    padding: 40px 0 24px;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-actions .btn {
    flex: 1;
    min-width: 140px;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .container {
    padding: 0 16px;
  }

  .section-header h2 {
    font-size: 22px;
  }

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

  .hero-content p {
    font-size: 15px;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-actions {
    flex-direction: column;
  }

  .form-group input,
  .form-group textarea {
    font-size: 16px;
  }

  .contact-form-wrap,
  .page-content {
    padding: 20px;
  }

  .footer-bottom {
    padding: 16px 0;
  }
}

/* ============================================================
   animations — 轻量动效
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Page styles: index.html */
.insights-more {
  margin-top: 32px;
  text-align: center;
}

.faq-more {
  margin-top: 24px;
  text-align: center;
}

.contact-header {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.contact-grid {
  max-width: 880px;
  margin: 0 auto;
}

.form-select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.form-submit {
  width: 100%;
}

.footer-logo {
  color: #fff;
}

.footer-logo-accent {
  color: #E8A87C;
}

.footer-service-text {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
}

/* Page styles: txvlog/features.html */
/* 页面专用微调：服务矩阵页的版式细节 */
.service-matrix-intro {
  background: var(--bg-white);
  border-left: 4px solid var(--accent);
  padding: 1.2rem 1.5rem;
  margin-bottom: 2rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  line-height: 1.7;
}

.service-matrix-intro p {
  margin: 0;
  color: var(--text-mid);
  font-size: 1rem;
}

.feature-detail-list {
  margin-top: 1.5rem;
}

.feature-detail-item {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.8rem 1.8rem 2rem;
  margin-bottom: 1rem;
  transition: box-shadow var(--transition);
}

.feature-detail-item:hover {
  box-shadow: var(--shadow-hover);
}

.feature-detail-item h4 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.feature-detail-item h4::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  display: inline-block;
}

.feature-detail-item p {
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 0;
}

.deliverable-tag {
  display: inline-block;
  background: var(--bg-light);
  color: var(--primary);
  font-size: 0.85rem;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  margin-top: 1rem;
  margin-right: 0.5rem;
  border: 1px solid var(--border);
}

.service-sidebar-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 2rem;
}

.service-sidebar-card h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border-light);
}

.service-sidebar-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.service-sidebar-card li {
  padding: 0.4rem 0;
  color: var(--text-mid);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.service-sidebar-card li::before {
  content: "•";
  color: var(--accent);
  font-weight: bold;
}

.cta-section-spacing {
  margin-top: 2.5rem;
}

@media (max-width: 768px) {
  .service-matrix-intro {
    padding: 1rem;
  }

  .feature-detail-item {
    padding: 1.2rem;
  }
}

/* Page styles: txvlog/guide.html */
/* 合作流程页专用样式 */
.process-hero {
  background: linear-gradient(135deg, #2F4F4F 0%, #243E3E 100%);
  color: #fff;
  padding: 3.5rem 0;
  margin-bottom: 2rem;
}
.process-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.process-hero h1 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
  color: #fff;
  font-weight: 700;
}
.process-hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 720px;
  line-height: 1.7;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.process-step-card {
  background: #fff;
  border-radius: 8px;
  padding: 1.8rem 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  border-top: 4px solid #2F4F4F;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.process-step-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}
.step-number {
  font-size: 2rem;
  font-weight: 800;
  color: #8B4513;
  line-height: 1;
  margin-bottom: 0.8rem;
}
.process-step-card h3 {
  font-size: 1.2rem;
  color: #2F4F4F;
  margin-bottom: 0.6rem;
}
.process-step-card p {
  font-size: 0.95rem;
  color: #555;
  line-height: 1.6;
}
.deliverable-box {
  background: #F5F5F5;
  border-radius: 8px;
  padding: 2rem 1.8rem;
  margin-top: 2.5rem;
  border-left: 5px solid #8B4513;
}
.deliverable-box h2 {
  font-size: 1.5rem;
  color: #2F4F4F;
  margin-bottom: 1rem;
}
.deliverable-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.deliverable-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #EDEDED;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1rem;
  color: #333;
}
.deliverable-list li::before {
  content: "✓";
  color: #8B4513;
  font-weight: 700;
}
.timeline-note {
  background: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  border: 1px solid #EDEDED;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.timeline-note .note-icon {
  font-size: 1.8rem;
  color: #8B4513;
}
.timeline-note p {
  margin: 0;
  color: #555;
  line-height: 1.6;
}
.cta-box {
  background: #F5F5F5;
  border-radius: 12px;
  padding: 2.5rem;
  text-align: center;
}
.cta-box h2 {
  color: #2F4F4F;
  margin-bottom: 0.75rem;
}
.cta-box p {
  color: #555;
  max-width: 600px;
  margin: 0 auto 1.5rem;
}
.cta-box .btn {
  font-size: 1rem;
  padding: 0.85rem 2.2rem;
}
@media (max-width: 992px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 576px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
  .process-hero h1 {
    font-size: 1.8rem;
  }
}

/* responsive guard */
html, body { max-width: 100%; overflow-x: hidden; }
img, video, canvas, svg { max-width: 100%; height: auto; }
* { min-width: 0; }
@media (max-width: 480px) {
  table { display: block; max-width: 100%; overflow-x: auto; }
}