/* =========================
   全体
========================= */
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(135deg, #eef2f7, #dfe6ee);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* =========================
   容器
========================= */
.login-container {
  width: 100%;
  max-width: 380px;
  padding: 20px;
}

/* =========================
   卡片
========================= */
.login-box {
  background: #fff;
  padding: 28px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* =========================
   标题
========================= */
.title {
  text-align: center;
  margin-bottom: 20px;
  font-size: 20px;
  font-weight: bold;
  color: #333;
}

/* =========================
   错误提示
========================= */
.error {
  background: #ffecec;
  color: #d93025;
  padding: 10px;
  border-radius: 6px;
  margin-bottom: 15px;
  font-size: 14px;
}

/* =========================
   表单
========================= */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  margin-bottom: 4px;
  color: #555;
}

.form-group input {
  width: 93%;
  height: 40px;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 0 10px;
  font-size: 14px;
  background: #f9fafc;
  transition: all 0.2s;
}

.form-group input:focus {
  border-color: #409eff;
  background: #fff;
  outline: none;
}

/* =========================
   登录按钮
========================= */
.login-btn {
  width: 100%;
  height: 42px;
  border: none;
  border-radius: 6px;
  background: #409eff;
  color: #fff;
  font-size: 15px;
  font-weight: bold;
  cursor: pointer;
  transition: 0.2s;
}

.login-btn:hover {
  background: #2f86e0;
}

/* =========================
   下载按钮
========================= */
.download-btn {
  display: block;
  margin-top: 14px;
  text-align: center;
  height: 40px;
  line-height: 40px;
  border-radius: 6px;
  background: #f4f6f9;
  color: #333;
  text-decoration: none;
  font-size: 14px;
  transition: 0.2s;
}

.download-btn:hover {
  background: #e8ecf2;
}

/* =========================
   小字说明
========================= */
.footer-text {
  margin-top: 10px;
  text-align: center;
  font-size: 12px;
  color: #999;
}