* { box-sizing: border-box; }

body {
  font-family: Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
  background: url("../img/bj.jpg") no-repeat center/cover;
  display: flex;
  justify-content: center;
  align-items: center;
}

.box {
  background: rgba(0,0,0,0.78);
  padding: 30px 28px;
  border-radius: 15px;
  width: 90%;
  max-width: 430px;
  box-shadow: 0 0 25px rgba(255,215,0,0.55);
  color: white;
}

h2 {
  text-align: center;
  color: gold;
  font-size: 24px;
  margin-bottom: 28px;
}

input, select {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  margin-bottom: 18px;
  border-radius: 8px;
  border: none;
  font-size: 15px;
  outline: none;
}

button {
  width: 100%;
  height: 50px;
  background: gold;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  font-size: 17px;
  cursor: pointer;
}

button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.tip {
  font-size: 13px;
  margin-top: 16px;
  line-height: 1.6;
  color: white;
}

.tip-red {
  color: red;
  font-weight: bold;
}

#msg {
  text-align: center;
  margin-top: 12px;
  font-size: 15px;
  font-weight: bold;
  color: #00ff99;
}
.logo {
  display: block;
  margin: 0 auto 15px;
  width: 340px;
  height: 106px;
  object-fit: cover;
  border-radius: 12px;
  background: #ffffff00;
  padding: 8px;
}
iframe { display: none; }