/* ===============================
   1. 全局与背景
================================= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'PingFang SC', 'Helvetica Neue', sans-serif;
  color: #444;
  background: linear-gradient(135deg, #ffecf2 0%, #e6f4ff 50%, #fff0f6 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

/* 背景光晕 */
.bg-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  z-index: 0;
  animation: float 20s infinite ease-in-out;
}
.shape-1 {
  width: 300px; height: 300px;
  background: #ffadd2;
  top: -50px; left: -50px;
}
.shape-2 {
  width: 250px; height: 250px;
  background: #bae7ff;
  bottom: -50px; right: -50px;
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, 40px); }
}

/* ===============================
   2. 主卡片 (磨砂玻璃)
================================= */
.main-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 380px; /* 稍微窄一点，更精致 */
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05), 0 5px 15px rgba(255, 133, 179, 0.1);
  padding: 35px 25px;
  display: flex;
  flex-direction: column;
  gap: 22px; /* 增加间距，拒绝拥挤 */
}

/* ===============================
   3. 头部样式
================================= */
.card-header { text-align: center; }

h1 {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1.2;
  color: #333;
  margin-bottom: 6px;
  background: linear-gradient(90deg, #ff85b3, #6ecbff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-fill-color: transparent;
}

h1 .highlight {
  display: block;
  font-size: 2.1rem;
  margin-top: 2px;
}

.subtitle {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 8px;
}

.author-sign {
  font-size: 0.75rem;
  color: #999;
  letter-spacing: 1px;
}

/* ===============================
   4. 表单通用
================================= */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-size: 0.9rem;
  font-weight: 700;
  color: #555;
  padding-left: 4px;
}

/* 输入框 & 下拉框 统一风格 */
input[type="text"],
select {
  width: 100%;
  padding: 14px 16px;
  font-size: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.85);
  color: #333;
  transition: all 0.3s ease;
  appearance: none; /* 移除默认样式 */
  -webkit-appearance: none;
  cursor: pointer;
}

/* 输入框特有 */
.input-wrapper { position: relative; }
input[type="text"] { padding-left: 42px; }
.input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  pointer-events: none;
}

/* 下拉框特有：自定义箭头 */
select {
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23ff85b3%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 14px;
  padding-right: 40px; /* 给箭头留位置 */
}

/* 聚焦状态 */
input[type="text"]:focus,
select:focus {
  background: #fff;
  border-color: #ff85b3;
  box-shadow: 0 0 0 4px rgba(255, 133, 179, 0.15);
  transform: translateY(-2px);
}

/* 占位符颜色 */
::placeholder { color: #aaa; }
select option { color: #333; } /* 确保下拉选项文字清晰 */

/* ===============================
   5. 提示框与按钮
================================= */
.tip-box {
  /* 改小字体 */
  font-size: 0.7rem; 
  
  /* 减小内边距，让盒子更紧凑 */
  padding: 8px 12px; 
  
  /* 增加透明度，让它更淡一点，不抢眼 */
  background: rgba(255, 255, 255, 0.3); 
  border: 1px dashed rgba(0,0,0,0.05); /* 边框也变淡 */
  
  border-radius: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px; /* 图标和文字间距稍微缩小 */
  color: #888; /* 文字颜色变浅灰 */
  line-height: 1.4;
}

.tip-icon { 
  font-size: 0.9rem; /* 图标也稍微变小 */
  opacity: 0.8;
}

.tip-box p { 
  margin: 0; 
  font-weight: 400; /* 取消加粗，更轻盈 */
}

/* ===============================
   6. 动画与适配
================================= */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--delay, 0s);
}

.shake {
  animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both;
  border-color: #ff4d4d !important;
}

@keyframes shake {
  10%, 90% { transform: translate3d(-1px, 0, 0); }
  20%, 80% { transform: translate3d(2px, 0, 0); }
  30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
  40%, 60% { transform: translate3d(4px, 0, 0); }
}

@media (max-width: 380px) {
  h1 { font-size: 1.5rem; }
  h1 .highlight { font-size: 1.8rem; }
  .main-card { padding: 25px 20px; }
}