/* ===== 页面整体设置 ===== */
html, body {
  margin: 0;
  padding: 0 8px;
  min-height: 100vh;
  width: 100%;
  font-family: "Helvetica Neue", sans-serif;
  background: linear-gradient(to bottom right, #eef3f9, #ffffff);
  display: flex;
  flex-direction: column;
  justify-content: stretch;
  align-items: stretch;
  overflow-x: hidden;
  overflow-y: auto;
  touch-action: pan-y;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

/* ===== 边界盒子模型，避免溢出 ===== */
*, *::before, *::after {
  box-sizing: border-box;
}

/* ===== 容器卡片区域 ===== */
.login-container {
  width: 100%;
  max-width: 100%;
  height: calc(100vh - 16px);
  margin: 8px 0;
  background: white;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  position: relative;
}

/* ===== 顶部按钮区域（返回、语言） ===== */
.top-icons {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.top-icons i {
  font-size: 20px;
  cursor: pointer;
}

/* ===== 标题与副标题 ===== */
.title {
  font-size: 22px;
  font-weight: bold;
  color: #111;
  margin-bottom: 6px;
}

.subtitle {
  font-size: 14px;
  color: #666;
  margin-bottom: 16px;
}

/* ===== 注册引导 / 切换登录方式区域 ===== */
.register-tip {
  font-size: 14px;
  margin-bottom: 20px;
  color: #333;
}
.register-tip a {
  color: #007aff;
  text-decoration: none;
}

.bottom-options {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: #007aff;
  margin: 12px 0 20px;
}

/* ===== 输入框区域 ===== */
.input-group {
  position: relative;
  margin-bottom: 16px;
}

.input-group input {
  width: 100%;
  padding: 12px 16px;
  font-size: 16px;
  border: none;
  border-radius: 999px;
  background-color: #f1f3f5;
  outline: none;
}

input, textarea {
  font-size: 16px;
}

/* ===== 眼睛图标（密码切换） ===== */
.eye-icon {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  font-size: 16px;
  color: #888;
  cursor: pointer;
}

/* ===== 图片验证码区域 ===== */
.captcha-group {
  display: flex;
  align-items: center;
  gap: 10px;
}
.captcha-group img {
  height: 38px;
  border-radius: 12px;
  cursor: pointer;
}

/* ===== 邮箱验证码 + 按钮（横向） ===== */
.email-code-group {
  display: flex;
  align-items: center;
  gap: 10px;
}
.email-code-group input {
  flex: 1;
}
.email-code-group button {
  white-space: nowrap;
  padding: 10px 14px;
  font-size: 14px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(to right, #4facfe, #00f2fe);
  color: white;
  font-weight: bold;
  cursor: pointer;
}

/* ===== 主按钮（登录/注册/提交） ===== */
.login-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(to right, #4facfe, #00f2fe);
  color: white;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
}

/* ===== 返回按钮样式（左上角） ===== */
.back-icon {
  position: absolute;
  top: 12px;
  left: 12px;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  height: 25px;
  width: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0a67ca;
  cursor: pointer;
  flex-shrink: 0;
  z-index: 1000;
}
.back-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  stroke: currentColor;
  stroke-width: 4;
}

/* ===== 语言切换按钮样式（右上角） ===== */
.language-icon {
  position: absolute;
  top: 12px;
  right: 12px;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  height: 25px;
  width: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0a67ca;
  cursor: pointer;
  flex-shrink: 0;
  z-index: 1000;
}
.language-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  fill: currentColor;
}

/* ===== 语言选择菜单 ===== */
.language-menu {
  position: absolute;
  top: 54px;
  right: 16px;
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  padding: 6px 0;
  z-index: 999;
  min-width: 130px;
  font-size: 14px;
}
.lang-item {
  padding: 10px 16px;
  cursor: pointer;
  color: #333;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}
.lang-item:hover {
  background-color: #f0f4fb;
}
.hidden {
  display: none;
}
.flag-icon {
  width: 20px;
  height: 14px;
  margin-right: 8px;
  vertical-align: middle;
  object-fit: contain;
  border-radius: 2px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

/* ===== 内容整体下移一点（避免顶头） ===== */
.content {
  margin-top: 70px;
}

.agreement-check {
  font-size: 13px;
  color: #555;
  margin: 10px 0;
  line-height: 1.6;
}

.agreement-check input[type="checkbox"] {
  margin-right: 6px;
  vertical-align: middle;
}

.policy-link {
  color: #007aff;
  text-decoration: none;
  margin: 0 4px;
}

.policy-link:hover {
  text-decoration: underline;
}

/* ===== 密码强度条样式 ===== */
.password-strength-bar {
  display: flex;              /* 横排排列能量格 */
  align-items: center;        /* 垂直居中 */
  width: 95%;                /* 与输入框100%齐平 */
  gap: 0;                     /* 不留空 */
  margin-top: -6px;           /* 上移贴近输入框 */
  margin-bottom: 16px;        /* 下方留空 */
  height: 10px;               /* 能量条高度 */
  position: relative;         /* 相对定位 */
  margin: -6px auto 16px auto;
}

.strength-block {
  flex: 1;                    /* 三格均分宽度 */
  height: 100%;               /* 填满高度 */
  margin-right: 5px;          /* 格间距 */
  border-radius: 100px;         /* 圆角，类似胶囊 */
  background: #e0e0e0;        /* 默认灰色 */
  transition: background 0.2s;
}
.strength-block:last-child {
  margin-right: 0;            /* 最后一格无右间距 */
}

/* ========== Toast中间弹窗提示样式 ========== */
.toast {
  position: fixed;                    /* 固定定位，保证始终居中 */
  left: 50%;
  top: 50%;
  z-index: 9999;                      /* 显示在最上层 */
  transform: translate(-50%, -50%);   /* 精准居中 */
  min-width: 180px;
  max-width: 80vw;
  background: rgba(34, 34, 34, 0.93); /* 半透明黑底 */
  color: #fff;                        /* 白字 */
  font-size: 16px;
  padding: 18px 28px;                 /* 内边距，圆角 */
  border-radius: 14px;
  box-shadow: 0 6px 32px rgba(0,0,0,0.20);
  text-align: center;
  transition: opacity 0.3s;
  opacity: 0;                         /* 初始透明 */
  pointer-events: none;               /* 鼠标穿透 */
}
.toast.show {
  opacity: 1;                         /* 显示时不透明 */
  pointer-events: auto;
}
.toast.hidden {
  display: none;                      /* 隐藏时彻底消失 */
}