/* ==================== 基础重置与变量 ==================== */
:root {
  --primary: #2e3092;
  --primary-dark: #232472;
  --accent: #8b7cff;
  --accent-light: #b0a4ff;
  --dark: #0b0d24;
  --dark-light: #171b45;
  --text: #333;
  --text-light: #666;
  --text-muted: #999;
  --bg: #fff;
  --bg-light: #f5f7fa;
  --bg-dark: #0b0d24;
  --border: #e8ecf1;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --transition: all 0.3s ease;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font-family);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul { list-style: none; }

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ==================== 按钮 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46,48,146,0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}

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

.btn-block {
  width: 100%;
}

/* ==================== 导航 ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  background: #fff;
}

.header.scrolled {
  background: #fff;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
}

.logo-icon {
  color: var(--accent);
  font-size: 28px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  /* color: var(--primary); */
  color: #666;
  padding: 8px 16px;
  font-size: 15px;
  border-radius: var(--radius);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-dark);
  background: rgba(46,48,146,0.08);
}

.nav-btn {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  margin-left: 8px;
}

.nav-btn:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

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

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== Banner轮播 ==================== */
.banner-carousel {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

.banner-slides {
  position: relative;
  height: 100%;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
  display: flex;
  align-items: center;
}

.banner-slide.active {
  opacity: 1;
}

.banner-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 700px;
}

.banner-tag {
  display: inline-block;
  /* background: rgba(139,124,255,0.2); */
  /* color: var(--accent); */
  background: #fff;
  color: #2e3092;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid rgba(139,124,255,0.3);
}

.banner-content h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}

.banner-content h1 .highlight {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.banner-content p {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 32px;
}

/* ==================== Banner关键词滚屏 ==================== */
.banner-keywords {
  position: relative;
  height: 32px;
  margin-bottom: 32px;
  overflow: hidden;
}

.keyword-item {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  font-size: 17px;
  /* color: var(--accent); */
  color: #fff;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
  letter-spacing: 1px;
}

.keyword-item.active {
  opacity: 1;
  transform: translateY(0);
}

.keyword-item.exit {
  opacity: 0;
  transform: translateY(-20px);
}

.banner-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.banner-decoration {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.deco-circle {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.05);
}

.deco-circle-1 {
  width: 600px;
  height: 600px;
  right: -200px;
  top: -100px;
  background: radial-gradient(circle, rgba(46,48,146,0.1) 0%, transparent 70%);
}

.deco-circle-2 {
  width: 400px;
  height: 400px;
  right: 100px;
  bottom: -100px;
  background: radial-gradient(circle, rgba(139,124,255,0.08) 0%, transparent 70%);
}

.deco-line {
  position: absolute;
  width: 1px;
  height: 200px;
  right: 30%;
  top: 20%;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.1), transparent);
}

.banner-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: var(--transition);
}

.banner-dot.active {
  background: var(--accent);
  width: 32px;
  border-radius: 6px;
}

.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.banner-arrow:hover {
  background: rgba(255,255,255,0.2);
}

.banner-prev { left: 30px; }
.banner-next { right: 30px; }

/* ==================== 页面Banner ==================== */
.page-banner {
  position: relative;
  padding: 160px 0 80px;
  overflow: hidden;
}

.page-banner-content {
  position: relative;
  z-index: 2;
  color: #fff;
  text-align: center;
}

.page-banner-tag {
  display: inline-block;
  background: rgba(139,124,255,0.2);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  border: 1px solid rgba(139,124,255,0.3);
  letter-spacing: 2px;
}

.page-banner-content h1 {
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-banner-content p {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
}

.case-stats-inline {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.case-stats-inline span {
  color: rgba(255,255,255,0.7);
  font-size: 15px;
}

.case-stats-inline strong {
  color: var(--accent);
  font-size: 24px;
  margin-right: 4px;
}

/* ==================== 通用Section ==================== */
.section-block {
  padding: 80px 0;
}

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

.section-block.bg-dark {
  /* background: var(--bg-dark); */
  background: #2e3092;
  color: #fff;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header.light {
  color: #fff;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-header.light .section-tag {
  color: var(--accent);
}

.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-light);
}

.section-header.light p {
  color: rgba(255,255,255,0.6);
}

.section-more {
  text-align: center;
  margin-top: 40px;
}

/* ==================== 主营业务 ==================== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.business-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: var(--transition);
}

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

.business-card:hover::before {
  transform: scaleX(1);
}

.business-icon {
  width: 56px;
  height: 56px;
  color: var(--primary);
  margin-bottom: 20px;
}

.business-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.business-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ==================== 数据统计 ==================== */
.stats-section {
  background: linear-gradient(135deg, var(--dark), var(--dark-light));
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item {
  color: #fff;
}

.stat-number {
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  display: inline;
  line-height: 1;
}

.stat-suffix {
  font-size: 24px;
  color: var(--accent);
  font-weight: 700;
}

.stat-label {
  font-size: 15px;
  color: rgba(255,255,255,0.6);
  margin-top: 8px;
}

/* ==================== 案例预览 ==================== */
.cases-preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.case-preview-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.case-preview-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.case-thumb {
  height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  position: relative;
  padding: 20px;
}

.case-industry {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,0.2);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  backdrop-filter: blur(4px);
}

.case-thumb h3 {
  font-size: 22px;
  font-weight: 700;
}

.case-info {
  padding: 20px;
}

.case-info h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.case-info p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 12px;
  line-height: 1.6;
}

.case-link {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
}

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

/* ==================== 合作客户 ==================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 16px;
}

.client-item {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
  font-weight: 600;
  transition: var(--transition);
  cursor: default;
}

.client-item:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ==================== 核心服务 ==================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: #fff;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-card-lg {
  grid-column: span 1;
}

.service-card-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.service-card-content {
  position: relative;
  z-index: 2;
  padding: 36px 28px;
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-features {
  list-style: none;
  padding: 0;
}

.service-features li {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.service-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ==================== 服务优势 ==================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-item {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  border: 1px solid var(--border);
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.advantage-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.15;
  margin-bottom: 8px;
  line-height: 1;
}

.advantage-item h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

/* ==================== 案例Tab与Grid ==================== */
.case-tabs,
.news-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.case-tab,
.news-tab {
  padding: 10px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--border);
  background: #fff;
  color: var(--text);
  transition: var(--transition);
}

.case-tab:hover,
.news-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.case-tab.active,
.news-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

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

.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.case-card.hidden {
  display: none;
}

.case-card-thumb {
  height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  position: relative;
  padding: 20px;
}

.case-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,0.2);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  backdrop-filter: blur(4px);
}

.case-card-thumb h3 {
  font-size: 24px;
  font-weight: 700;
}

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

.case-card-body h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

.case-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.case-tags span {
  background: var(--bg-light);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

/* ==================== 新闻 ==================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.news-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border);
}

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

.news-card.hidden {
  display: none;
}

.news-featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.news-featured .news-card-thumb {
  height: 100%;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-featured .news-card-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-card-thumb {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.news-badge {
  background: var(--primary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-sign {
  background: #00897b;
}

.badge-company {
  background: var(--primary);
}

.badge-media {
  background: #e65100;
}

.news-card-body {
  padding: 24px;
}

.news-date {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.news-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
}

.news-card-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-link {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
}

.news-link:hover {
  color: var(--primary-dark);
}

/* ==================== 关于 ==================== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-intro-text .section-tag {
  text-align: left;
  display: block;
}

.about-intro-text h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 20px;
}

.about-lead {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.7;
}

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

.about-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.about-highlight {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.about-highlight strong {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.about-highlight span {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
}

.about-intro-visual {
  position: sticky;
  top: 100px;
}

.about-visual-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.visual-item {
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  color: #fff;
  text-align: center;
}

.visual-num {
  font-size: 42px;
  font-weight: 800;
  display: inline;
  line-height: 1;
}

.visual-unit {
  font-size: 18px;
  font-weight: 700;
}

.visual-label {
  display: block;
  font-size: 14px;
  margin-top: 8px;
  opacity: 0.8;
}

/* ==================== 发展历程 ==================== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
  padding-left: 36px;
}

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

.timeline-dot {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid #fff;
  box-shadow: 0 0 0 3px var(--primary);
}

.timeline-content {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.timeline-year {
  font-size: 14px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* ==================== 荣誉资质 ==================== */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.honor-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.honor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.honor-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.honor-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.honor-card p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ==================== 联系我们 ==================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.contact-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 48px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 24px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.1);
  transition: var(--transition);
}

.contact-item:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

.contact-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  color: var(--accent);
}

.contact-item h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  color: #fff;
}

.contact-item p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
}

.contact-form {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(10px);
}

.contact-form h3 {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.05);
  color: #fff;
  font-size: 14px;
  margin-bottom: 16px;
  outline: none;
  transition: var(--transition);
  font-family: var(--font-family);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255,255,255,0.4);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.08);
}

.contact-form select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='rgba(255,255,255,0.5)' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

.contact-form select option {
  background: #171b45;
  color: #fff;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-row input {
  margin-bottom: 16px;
}

.contact-form textarea {
  resize: vertical;
  min-height: 100px;
}

/* ==================== 页脚 ==================== */
.footer {
  background: #fff;
  /* color: var(--primary); */
  color: #666;
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-about p {
  font-size: 14px;
  line-height: 1.8;
}

.footer-links h4,
.footer-contact h4 {
  /* color: var(--primary-dark); */
  color: #666;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

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

.footer-links a {
  font-size: 14px;
  /* color: var(--primary); */
  color: #666;
}

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

.footer-contact p {
  font-size: 14px;
  margin-bottom: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(46,48,146,0.15);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 20px;
  cursor: pointer;
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 999;
  box-shadow: 0 4px 16px rgba(46,48,146,0.3);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
}

/* ==================== 服务流程 ==================== */
.process-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 20px 0;
}

.process-step {
  flex: 1;
  min-width: 160px;
  max-width: 200px;
  text-align: center;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.process-step:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.process-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: 8px;
}

.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

.process-arrow {
  color: var(--primary);
  font-size: 24px;
  font-weight: 700;
  opacity: 0.3;
}

/* ==================== 客户评价 ==================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.testimonial-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-light);
  margin-bottom: 24px;
  position: relative;
  padding-left: 20px;
  border-left: 3px solid var(--primary);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 15px;
  font-weight: 700;
}

.testimonial-title {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 1024px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .process-flow {
    flex-direction: column;
  }

  .process-arrow {
    transform: rotate(90deg);
  }

  .process-step {
    max-width: 100%;
    width: 100%;
  }

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

/* ==================== 响应式 - 平板 ==================== */
@media (max-width: 1024px) {
  .business-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .clients-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

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

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

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

  .about-intro {
    grid-template-columns: 1fr;
  }

  .about-intro-visual {
    position: static;
  }
}

/* ==================== 响应式 - 手机 ==================== */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: #fff;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-120%);
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    border-top: 1px solid rgba(46,48,146,0.1);
    z-index: 1001;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
  }

  .nav.open {
    transform: translateY(0);
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    padding: 12px 16px;
    width: 100%;
    border-radius: var(--radius);
  }

  .nav-btn {
    margin-left: 0;
    margin-top: 8px;
    text-align: center;
  }

  .menu-toggle {
    display: flex;
  }

  .banner-carousel {
    height: 55vh;
    min-height: 360px;
  }

  .banner-slide {
    padding: 80px 0 40px;
    align-items: center;
  }

  .banner-content {
    max-width: 100%;
  }

  .banner-tag {
    font-size: 12px;
    padding: 4px 12px;
    margin-bottom: 14px;
  }

  .banner-content h1 {
    font-size: 28px;
    margin-bottom: 14px;
  }

  .banner-content p {
    font-size: 14px;
    margin-bottom: 24px;
  }

  .banner-keywords {
    height: 28px;
    margin-bottom: 24px;
  }

  .keyword-item {
    font-size: 14px;
  }

  .banner-btns {
    gap: 10px;
  }

  .banner-dots {
    bottom: 24px;
    gap: 8px;
  }

  .banner-dot {
    width: 8px;
    height: 8px;
  }

  .banner-dot.active {
    width: 24px;
  }

  .banner-arrow {
    display: none;
  }

  .deco-circle {
    display: none;
  }

  .deco-line {
    display: none;
  }

  .section-block {
    padding: 48px 0;
  }

  .section-header h2 {
    font-size: 26px;
  }

  .page-banner {
    padding: 120px 0 48px;
  }

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

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

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

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

  .stat-number {
    font-size: 36px;
  }

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

  .clients-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .client-item {
    padding: 14px 8px;
    font-size: 12px;
  }

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

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

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

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

  .news-featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

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

  .about-highlights {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

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

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

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

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

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

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

  .case-stats-inline {
    gap: 16px;
  }

  .case-stats-inline strong {
    font-size: 20px;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline-item {
    padding-left: 24px;
  }

  .timeline-dot {
    left: -26px;
    width: 12px;
    height: 12px;
  }
}

@media (max-width: 480px) {
  .banner-carousel {
    height: 50vh;
    min-height: 320px;
  }

  .banner-slide {
    padding: 70px 0 40px;
  }

  .banner-content h1 {
    font-size: 22px;
    margin-bottom: 10px;
  }

  .banner-content p {
    font-size: 13px;
    margin-bottom: 20px;
  }

  .banner-keywords {
    height: 24px;
    margin-bottom: 20px;
  }

  .keyword-item {
    font-size: 13px;
  }

  .banner-btns {
    /* flex-direction: column; */
  }

  .banner-btns .btn {
    text-align: center;
    /* width: 100%; */
  }

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

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .case-tabs,
  .news-tabs {
    gap: 8px;
  }

  .case-tab,
  .news-tab {
    padding: 8px 16px;
    font-size: 13px;
  }
}