:root {
  --primary: #1e6deb;
  --primary-dark: #0d5ac1;
  --secondary: #2c3e50;
  --accent: #1e6deb;
  --light: #f8f9fa;
  --green: #10b981;
  --gray: #6c757d;
  --border: #e1e5eb;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
}

body {
  background-color: #f5f7fa;
  color: #333;
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* 头部导航 */
header {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  padding: 15px 0;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 24px;
  color: var(--primary);
}

.logo i {
  margin-right: 10px;
  color: var(--accent);
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin: 0 15px;
}

.nav-links a {
  text-decoration: none;
  color: var(--secondary);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-links a:after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-links a:hover:after {
  width: 100%;
}

.nav-buttons {
  display: flex;
}

.btn {
  padding: 10px 20px;
  border-radius: 30px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 16px;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  margin-right: 10px;
}

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

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 7px 14px rgba(30, 109, 235, 0.3);
}

/* Hero 区域 */
.hero {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, #f0f7ff 0%, #e6f7ff 100%);
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-text {
  flex: 1;
  max-width: 600px;
}

.hero-text h1 {
  font-size: 3.2rem;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--secondary);
}

.hero-text h1 span {
  color: var(--primary);
}

.hero-text p {
  font-size: 1.2rem;
  color: var(--gray);
  margin-bottom: 30px;
}

.hero-stats {
  display: flex;
  margin: 30px 0;
}

.stat-item {
  margin-right: 30px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--gray);
}

.hero-buttons {
  display: flex;
  gap: 15px;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  position: relative;
}

.mockup {
  /* 使用9:16的常见手机比例 */
  width: 100%;
  max-width: 360px;
  /* 更符合现代手机尺寸 */
  aspect-ratio: 9/16;
  /* 保持比例的关键属性 */

  background-image: url("../image/workbench.png");
  background-size: contain;
  /* 保持图片原始比例 */
  background-repeat: no-repeat;
  background-position: center;

  border-radius: 40px;
  /* box-shadow: var(--shadow); */
  position: relative;
  overflow: hidden;
  margin: 0 auto;
  /* 居中显示 */
}

.mockup-screen {
  height: 100%;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
  padding: 20px;
}

/* 核心优势 */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 2.5rem;
  color: var(--secondary);
  margin-bottom: 15px;
}

.section-title-highlight {
  font-size: 2.5rem;
  color: var(--light);
  margin-bottom: 15px;
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--gray);
  max-width: 700px;
  margin: 0 auto;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.advantage-card {
  background: white;
  border-radius: 15px;
  padding: 35px 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
}

.advantage-icon {
  width: 80px;
  height: 80px;
  background: rgba(30, 109, 235, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 25px;
  color: var(--primary);
  font-size: 32px;
}

.advantage-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--secondary);
}

.advantage-card p {
  color: var(--gray);
}

/* 业务流程 */
.workflow {
  background: linear-gradient(to right, #2c3e50, #1a2530);
  color: white;
  position: relative;
  overflow: hidden;
}

.workflow-steps {
  display: flex;
  justify-content: space-between;
  margin-top: 60px;
  position: relative;
}

.workflow-steps::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
}

.step {
  position: relative;
  z-index: 2;
  text-align: center;
  flex: 1;
}

.step-icon {
  width: 80px;
  height: 80px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 30px;
}

.step h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
}

.step-content {
  background: rgba(255, 255, 255, 0.1);
  padding: 20px;
  border-radius: 10px;
  max-width: 250px;
  margin: 0 auto;
}

.step-content ul {
  list-style: none;
  text-align: left;
}

.step-content li {
  padding: 8px 0;
  position: relative;
  padding-left: 25px;
}

.step-content li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

/* 产品亮点 */
.highlights-tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 25px;
  background: white;
  border: none;
  border-radius: 30px;
  margin: 5px 10px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.tab-btn.active,
.tab-btn:hover {
  background: var(--primary);
  color: white;
}

.highlight-content {
  display: none;
}

.highlight-content.active {
  display: block;
}

.highlight-card {
  background: white;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  margin-bottom: 30px;
}

.highlight-image {
  flex: 1;
  min-height: 300px;
  background: linear-gradient(45deg, #1e6deb, #2c3e50);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
  padding: 20px;
}

.highlight-image-nobackgroud {
  flex: 1;
  border-radius: 0px 12px 12px 0px;
  overflow: hidden;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
  width: 100%;
  height: auto;
  display: block;
}

.highlight-text {
  flex: 1;
  padding: 40px;
}

.highlight-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.2;
  margin-bottom: 15px;
}

.highlight-text h3 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--secondary);
}

/* 客户案例 */
.case-study {
  background: #f0f7ff;
  padding: 80px 0;
}

.case-content {
  display: flex;
  align-items: center;
  gap: 50px;
}

.case-text {
  flex: 1;
}

.case-stats {
  display: flex;
  margin: 25px 0 35px;
}

.case-image {
  flex: 1;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

.case-image img {
  width: 100%;
  height: auto;
  display: block;
}

.quote {
  font-style: italic;
  font-size: 1.2rem;
  border-left: 4px solid var(--accent);
  padding-left: 20px;
  margin: 30px 0;
  color: var(--secondary);
}

.author {
  font-weight: 600;
  color: var(--primary);
}

/* 未来演进 */
.roadmap {
  position: relative;
}

.roadmap-container {
  display: flex;
  position: relative;
  margin-top: 60px;
  flex-wrap: wrap;
}

.roadmap-container::before {
  content: "";
  position: absolute;
  top: 60px;
  left: 50%;
  height: calc(100% - 120px);
  width: 4px;
  background: var(--border);
  transform: translateX(-50%);
}

.milestone {
  width: 50%;
  padding: 30px;
  position: relative;
}

.milestone:nth-child(odd) {
  padding-right: 70px;
  text-align: right;
}

.milestone:nth-child(even) {
  margin-top: 120px;
  padding-left: 70px;
}

.milestone-content {
  background: white;
  border-radius: 15px;
  padding: 30px;
  box-shadow: var(--shadow);
  position: relative;
}

.milestone:nth-child(odd) .milestone-content::after {
  content: "";
  position: absolute;
  top: 40px;
  right: -20px;
  width: 20px;
  height: 20px;
  border: 4px solid var(--primary);
  border-radius: 50%;
  background: white;
}

.milestone:nth-child(even) .milestone-content::after {
  content: "";
  position: absolute;
  top: 40px;
  left: -20px;
  width: 20px;
  height: 20px;
  border: 4px solid var(--primary);
  border-radius: 50%;
  background: white;
}

.milestone-date {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.milestone h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--secondary);
}

.milestone ul {
  list-style: none;
}

.milestone li {
  padding: 8px 0;
  position: relative;
  padding-left: 25px;
}

.milestone li:before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 1.5rem;
  line-height: 1;
}

/* 页脚 */
footer {
  background: var(--secondary);
  color: white;
  padding: 80px 0 30px;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: 50px;
  margin-bottom: 50px;
}

.footer-column {
  flex: 1;
  min-width: 250px;
}

.footer-column h3 {
  font-size: 1.4rem;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 15px;
}

.footer-column h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background: var(--accent);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
  padding-left: 5px;
}

.contact-info {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  color: rgba(255, 255, 255, 0.7);
}

.contact-info i {
  margin-right: 15px;
  color: var(--accent);
  width: 20px;
}

.social-links {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  transition: var(--transition);
  text-decoration: none;
}

.social-links a:hover {
  background: var(--primary);
  transform: translateY(-3px);
}

.copyright {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
    margin-bottom: 50px;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .case-content {
    flex-direction: column;
  }

  .highlight-card {
    flex-direction: column;
  }

  .roadmap-container {
    flex-direction: column;
  }

  .roadmap-container::before {
    left: 20px;
    height: 100%;
  }

  .milestone {
    width: 100%;
    padding: 30px 0 30px 70px !important;
    text-align: left !important;
  }

  .milestone:nth-child(even) {
    margin-top: 0;
  }

  .milestone:nth-child(odd) .milestone-content::after,
  .milestone:nth-child(even) .milestone-content::after {
    left: 0px;
    right: auto;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .workflow-steps {
    flex-direction: column;
    gap: 40px;
  }

  .workflow-steps::before {
    display: none;
  }

  .step {
    flex: none;
    width: 100%;
  }
}