body {
  font-family: "Arial", sans-serif;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
  color: #ffffff;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(#1fe9e92b 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: 1;
  pointer-events: none;
}
/* Stars background */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* background: radial-gradient(2px 2px at 20px 30px, #00ffff, transparent),
        radial-gradient(2px 2px at 40px 70px, #ff0080, transparent),
        radial-gradient(1px 1px at 90px 40px, #ffffff, transparent),
        radial-gradient(1px 1px at 130px 80px, #00ff80, transparent),
        radial-gradient(2px 2px at 160px 30px, #8000ff, transparent); */
  background: url("../bg.png");

  background-repeat: no-repeat;
  /* background-size: 200px 100px; */
  z-index: 1;
  pointer-events: none;
  animation: twinkle 4s infinite;
  filter: brightness(0.5);
}
@keyframes twinkle {
  0%,
  100% {
    opacity: 0.5;
  }

  50% {
    opacity: 0.2;
  }
}

.container {
  position: relative;
  z-index: 2;
  backdrop-filter: blur(5px);
  background: rgba(255, 255, 255, 0.07);
}

/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  /* background: #f5f7fa; */
  color: #333;
  line-height: 1.6;
  padding: 40px 20px;
}

@media (max-width: 767px) {
  body {
    padding: 10px;
  }
}

.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 40px;
  /* background: white; */
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

@media (max-width: 767px) {
  .container {
    padding: 10px;
  }
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid #e9ecef;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: #1a56ff;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 0.9rem;
}

.main {
  display: flex;
  gap: 40px;
  padding: 30px 0 0 30px;
  align-items: center;
}

@media (max-width: 767px) {
  .main {
    flex-direction: column;
    padding: 0;
  }
}

.content {
  flex: 1;
}

.tagline {
  color: #cccccc;
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.title {
  font-size: 2.2rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 16px;
  line-height: 1.2;
  font-size: 3rem;
  font-weight: bold;
  background: linear-gradient(45deg, #00ffff, #ff0080, #00ff80);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
  text-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

.subtitle {
  color: #cccccc;
  font-size: 1rem;
  margin-bottom: 24px;
}

.features {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
}

.feature {
  flex: 1;
  padding: 16px;
  background: #e4f3ff;
  border-radius: 8px;
  border-left: 4px solid #1a56ff;
}

.feature h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
  color: #1a1a1a;
}

.feature p {
  font-size: 0.85rem;
  color: #bec3c7;
}

.cta-buttons {
  display: flex;
  gap: 12px;
}

.btn {
  padding: 12px 24px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(45deg, #00ffff, #ff0080);
  color: white;
  border: none;
}

.btn-secondary {
  background: transparent;
  color: #1a56ff;
  border: 2px solid #1a56ff;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #f1f3f50a;
  border-radius: 12px;
  padding: 20px;
  position: relative;
  height: 500px;
  gap: 12px;
}

@media (max-width: 1600px) {
  .visual {
    transform: translateX(-50px);
  }
}

@media (max-width: 767px) {
  .visual {
    transform: translateX(0px);
    width: 100%;
  }
}

.visual-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: start;
  height: 100%;
}

.circle {
  min-width: 250px;
  width: 250px;
  height: 250px;
  background: linear-gradient(135deg, #1a56ff, #00bfff);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 8px 20px rgba(26, 86, 255, 0.3);
}

.label {
  position: absolute;
  background: #ffffff57;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.85rem;
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.label-top {
  top: 30px;
  left: 30px;
}

.label-right {
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
}

@media (max-width: 767px) {
  .label-bottom,
  .label-top,
  .label-right {
    display: none !important;
  }
}

@media (max-width: 1600px) {
  .label-bottom,
  .label-top,
  .label-right {
    display: block;
  }
}

.label-bottom {
  bottom: 30px;
  left: 30px;
}

.footer {
  text-align: center;
  padding: 20px;
  font-size: 0.8rem;
  color: #6c757d;
  border-top: 1px solid #e9ecef;
}

.footer a {
  color: #1a56ff;
  text-decoration: none;
  margin: 0 10px;
}