/* 智能焊接技术 — 登录页 */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  color: #333;
  background: linear-gradient(160deg, #f0f4f8 0%, #e8eef5 50%, #f5f7fa 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px 80px;
}

.login-wrap {
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.site-title {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 700;
  color: #1a5fb4;
  letter-spacing: 0.08em;
}

.site-sub {
  margin: 0 0 28px;
  font-size: 14px;
  color: #666;
}

.login-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(26, 95, 180, 0.1);
  border: 1px solid #dde4ec;
  padding: 32px 28px 28px;
  text-align: left;
}

.login-card h2 {
  margin: 0 0 20px;
  font-size: 18px;
  font-weight: 600;
  text-align: center;
  color: #333;
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  color: #555;
}

.field input[type="text"],
.field input[type="password"] {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid #c5d0de;
  border-radius: 6px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.15s;
}

.field input:focus {
  border-color: #1a5fb4;
  box-shadow: 0 0 0 2px rgba(26, 95, 180, 0.15);
}

.captcha-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.captcha-row input {
  flex: 1;
  min-width: 0;
  height: 42px;
  padding: 0 12px;
  border: 1px solid #c5d0de;
  border-radius: 6px;
  font-size: 15px;
  outline: none;
}

.captcha-row input:focus {
  border-color: #1a5fb4;
}

#captchaCanvas {
  flex-shrink: 0;
  width: 120px;
  height: 42px;
  border: 1px solid #c5d0de;
  border-radius: 6px;
  cursor: pointer;
  background: #f8fafc;
}

.captcha-hint {
  margin-top: 4px;
  font-size: 12px;
  color: #888;
}

.btn-login {
  width: 100%;
  height: 44px;
  margin-top: 8px;
  border: none;
  border-radius: 6px;
  background: linear-gradient(180deg, #3584e4, #1a5fb4);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s;
}

.btn-login:hover {
  filter: brightness(1.05);
}

.btn-login:active {
  filter: brightness(0.95);
}

.login-error {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 6px;
  background: #fdecea;
  border: 1px solid #f5c2c0;
  color: #b3261e;
  font-size: 14px;
  display: none;
}

.login-error.show {
  display: block;
}

.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px;
  text-align: center;
  font-size: 13px;
  color: #666;
  line-height: 1.8;
  background: rgba(255, 255, 255, 0.85);
  border-top: 1px solid #e8ecf0;
}

.site-footer a {
  color: #1a5fb4;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.site-footer .beian-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
}