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

:root {
  --primary-dark: #0a2e36;
  --primary-light: #2a9d8f;
  --accent: #e9c46a;
  --text-light: #f1faee;
  --text-gray: #e0e0e0;
  --overlay: rgba(10, 46, 54, 0.85);
}

body {
  font-family: "Poppins", sans-serif;
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 背景与蒙层 */
.background-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
}

.background-image {
  background-image: url("https://images.unsplash.com/photo-1488646953014-85cb44e25828?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1935&q=80");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  width: 100%;
  height: 100%;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, var(--overlay), rgba(10, 46, 54, 0.7));
  z-index: 1;
}

/* 导航栏 */
header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 20px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background-color: rgba(10, 46, 54, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(42, 157, 143, 0.3);
}

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

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

.logo-text {
  font-family: "Montserrat", sans-serif;
  font-size: 28px;
  font-weight: 600;
  background: linear-gradient(to right, var(--accent), var(--primary-light));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  font-size: 16px;
  padding: 8px 16px;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.nav-links a:hover {
  color: var(--accent);
  background-color: rgba(42, 157, 143, 0.1);
}

/* 主要内容区 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 20px 60px;
}

.hero {
  text-align: center;
  padding: 80px 0 40px;
  margin-bottom: 60px;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 20px;
  font-family: "Montserrat", sans-serif;
  background: linear-gradient(to right, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: 20px;
  max-width: 700px;
  margin: 0 auto 30px;
  color: var(--text-gray);
}

/* 应用截图部分 */
.screenshots-section {
  margin: 80px 0;
}

.section-title {
  font-size: 32px;
  margin-bottom: 40px;
  text-align: center;
  font-family: "Montserrat", sans-serif;
  color: var(--text-light);
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  width: 80px;
  height: 4px;
  background: linear-gradient(to right, var(--primary-light), var(--accent));
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 2px;
}

.screenshots-container {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.screenshot-placeholder {
  width: 180px;
  height: 405px; /* 保持4:9宽高比 */
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  position: relative;
  border: 2px solid rgba(42, 157, 143, 0.5);
  transition: transform 0.3s ease;
}

.screenshot-placeholder:hover {
  transform: translateY(-10px);
}

.screenshot-placeholder:nth-child(1) {
  background: linear-gradient(145deg, #1d3557, #457b9d);
}

.screenshot-placeholder:nth-child(2) {
  background: linear-gradient(145deg, #2a9d8f, #1d3557);
}

.screenshot-placeholder:nth-child(3) {
  background: linear-gradient(145deg, #e9c46a, #2a9d8f);
}

.screenshot-placeholder:nth-child(4) {
  background: linear-gradient(145deg, #1d3557, #e76f51);
}

.screenshot-label {
  position: absolute;
  bottom: 20px;
  left: 0;
  width: 100%;
  text-align: center;
  font-weight: 600;
  color: var(--text-light);
  font-size: 14px;
}

/* 产品描述部分 */
.description-section {
  margin: 80px 0;
}

.description-block {
  background-color: rgba(10, 46, 54, 0.7);
  border-radius: 15px;
  padding: 40px;
  margin-bottom: 40px;
  border-left: 5px solid var(--primary-light);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.description-block h3 {
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--accent);
  font-family: "Montserrat", sans-serif;
}

.description-block p {
  margin-bottom: 15px;
  color: var(--text-gray);
}

.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.feature-card {
  background-color: rgba(42, 157, 143, 0.1);
  border-radius: 10px;
  padding: 25px;
  border: 1px solid rgba(42, 157, 143, 0.3);
  transition: all 0.3s ease;
}

.feature-card:hover {
  background-color: rgba(42, 157, 143, 0.2);
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 36px;
  color: var(--primary-light);
  margin-bottom: 15px;
}

.feature-card h4 {
  font-size: 20px;
  margin-bottom: 15px;
  color: var(--text-light);
}

/* 页脚 */
footer {
  background-color: rgba(10, 46, 54, 0.95);
  padding: 50px 20px 30px;
  margin-top: 60px;
  border-top: 1px solid rgba(42, 157, 143, 0.3);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-info {
  margin-bottom: 30px;
  text-align: center;
}

.contact-info a {
  color: var(--primary-light);
  text-decoration: none;
  font-size: 18px;
  transition: color 0.3s ease;
}

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

.copyright {
  color: var(--text-gray);
  font-size: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  width: 100%;
  text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-links {
    gap: 15px;
  }

  .nav-links a {
    font-size: 14px;
    padding: 6px 12px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero p {
    font-size: 18px;
  }

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

  .description-block {
    padding: 25px;
  }

  .screenshot-placeholder {
    width: 150px;
    height: 337.5px;
  }

  .features-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  header {
    flex-direction: column;
    padding: 15px 5%;
    gap: 15px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 60px 0 30px;
  }

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

  .screenshot-placeholder {
    width: 120px;
    height: 270px;
  }
}