body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #0f1535 60%, #1ec6e6 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  padding: 32px 16px 0 16px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.robot-img {
  width: 160px;
  height: 160px;
  margin-bottom: 16px;
  /* 占位SVG机器人 */
  background: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.robot-img img {
  animation: ai-float 2.2s ease-in-out infinite alternate;
}

@keyframes ai-float {
  0% {
    transform: translateY(0) scale(1);
    filter: drop-shadow(0 2px 8px #3eeaff44);
  }
  50% {
    transform: translateY(-12px) scale(1.04);
    filter: drop-shadow(0 8px 18px #3eeaff66);
  }
  100% {
    transform: translateY(0) scale(1);
    filter: drop-shadow(0 2px 8px #3eeaff44);
  }
}

.title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: #3eeaff;
  text-align: left;
  width: 100%;
}

.subtitle {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 24px;
  color: #fff;
  text-align: left;
  width: 100%;
  line-height: 1.2;
}

.card {
  background: rgba(20, 30, 60, 0.95);
  border-radius: 18px;
  padding: 20px 18px;
  margin-bottom: 24px;
  width: 100%;
  box-sizing: border-box;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
}

.result-box {
  background: linear-gradient(135deg, #18213c 60%, #1ec6e6 100%);
  border-radius: 12px;
  padding: 64px 18px; /* 高度加一倍，原32px改为64px */
  max-width: 340px;
  margin: 60px auto;
  color: #fff;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
}

.accuracy {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: #fff;
}

.accuracy .percent {
  color: #3eeaff;
  font-weight: bold;
  font-size: 1.3rem;
}

.desc {
  font-size: 1rem;
  color: #b8c6e0;
  margin-bottom: 6px;
}

.desc .highlight {
  color: #3eeaff;
  font-weight: 500;
  text-decoration: underline;
  cursor: pointer;
}

.input-group {
  width: 100%;
  margin-bottom: 18px;
}

.input-group input {
  width: 100%;
  padding: 14px 12px;
  border-radius: 8px;
  border: none;
  background: #232b45;
  color: #b8c6e0;
  font-size: 1rem;
  outline: none;
  margin-bottom: 0;
  box-sizing: border-box;
}

.btn {
  width: 100%;
  padding: 14px 0;
  border: none;
  border-radius: 24px;
  background: linear-gradient(90deg, #1ec6e6 0%, #3eeaff 100%);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 8px;
  box-shadow: 0 2px 8px rgba(30, 198, 230, 0.18);
  animation: btn-breath 1.8s ease-in-out infinite;
}

@keyframes btn-breath {
  0% {
    box-shadow: 0 2px 16px 0 rgba(30, 198, 230, 0.25),
      0 2px 8px rgba(30, 198, 230, 0.18);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 4px 32px 0 rgba(30, 198, 230, 0.38),
      0 2px 16px rgba(30, 198, 230, 0.22);
    transform: scale(1.04);
  }
  100% {
    box-shadow: 0 2px 16px 0 rgba(30, 198, 230, 0.25),
      0 2px 8px rgba(30, 198, 230, 0.18);
    transform: scale(1);
  }
}

#chat-btn {
  animation: breath 1.6s ease-in-out infinite;
}

@keyframes breath {
  0% {
    box-shadow: 0 2px 12px 0 #15a22333;
    transform: scale(1);
  }
  50% {
    box-shadow: 0 6px 24px 0 #15a22355;
    transform: scale(1.04);
  }
  100% {
    box-shadow: 0 2px 12px 0 #15a22333;
    transform: scale(1);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 18px 4px 0 4px;
  }

  .robot-img {
    width: 120px;
    height: 120px;
  }

  .title {
    font-size: 1.3rem;
  }

  .subtitle {
    font-size: 1.1rem;
  }
}