:root {
    --primary-red: rgba(155, 0, 18, 1);
    --dark-red: #cc0010;
    --white: #ffffff;
    --black: #000000;
    --dark-gray: #333333;
    --light-gray: #f5f5f5;
    --yellow: #FFD700;
    --transition: all 0.3s ease;
    --txt-dark: #330004;
    --txt-gray: #665C5D;
    --txt-dark-gray: #998A8B;
    --primary-pink: #FFA6AC;
    --btn-blue: #0B85E6;
    --btn-blue-hover: #0099FF;
}

/* --- Floating buttons --- */
.floating-buttons{
  position: fixed;
  right: 30px;
  bottom: 30px;
  z-index: 1000000;              /* 悬浮按钮层级 */
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.floating-btn{
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--img, none) no-repeat center/100% 100%;
  box-shadow: 0 8px 20px rgba(0,0,0,.18);
  transition: transform .18s ease, box-shadow .18s ease, background-image .18s ease, opacity .18s;
  display: inline-block;
}
.floating-btn:hover{
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0,0,0,.22);
  background-image: var(--img-hover, var(--img));
}
/* 回到顶部：默认隐藏，到阈值才显 */
#backToTopBtn{ opacity: 0; pointer-events: none; }
#backToTopBtn.is-visible{ opacity: 1; pointer-events: auto; }

/* --- Modal 覆盖层 + 锚定对齐 --- */
.modal{
  position: fixed; inset: 0;
  opacity: 0; pointer-events: none;
  transition: opacity .2s ease;
  z-index: 999999;              /* 弹框层级，比悬浮按钮高 */
}
.modal.is-open{ opacity: 1; pointer-events: auto; }
.modal__overlay{
  position: absolute; inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 999999;              /* 弹框覆盖层层级 */
}

/* 对话框：用 fixed 定位，JS 设 top/right 与按钮对齐 */
.modal__dialog{
  position: fixed;
  z-index: 1000000;              /* 弹框对话框层级，最高 */
  width: min(860px, 92vw);
  background: #f5f6f8;
  border-radius: 16px;
/*  box-shadow: 0 20px 60px rgba(0,0,0,.35);*/
  overflow: hidden;
  transform: translateY(8px);   /* 轻微过渡 */
  transition: transform .22s ease;
}
.modal.is-open .modal__dialog{ transform: translateY(0); }

/* 顶部蓝条和标题 */
.modal__header{
  background: #0b82f0;
  color: #fff;
  padding: 22px 28px 18px;
}
.modal__header h2{
  margin: 0 0 6px; font-size: 36px; line-height: 1.15; font-weight: 800;
}
.modal__header p{ margin: 0; opacity: .95; }

/* 表单主体 */
.modal__form{
  padding: 26px 28px 30px;
  background: #f5f6f8;
}
.form-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 18px 22px;
}
.field{ display: block; }
.field--full{ grid-column: 1 / -1; }

input, textarea{
  width: 100%;
  font: 16px/1.4 system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  padding: 14px 16px;
  color: #333;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
textarea{ min-height: 120px; resize: vertical; }
input:focus, textarea:focus{
  border-color: #0b82f0;
  box-shadow: 0 0 0 3px rgba(11,130,240,.15);
}

.btn-primary{
  display: block;
  width: 100%;
  margin-top: 22px;
  padding: 14px 18px;
  font-size: 18px; font-weight: 700;
  color: #fff; 
  background-color: var(--btn-blue);
  border: none; border-radius: 999px;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn-primary:hover{ 
  background-color: var(--btn-blue-hover);
}

/* 右上角 X */
.modal__close{
  position: absolute; top: 14px; right: 14px;
  width: 40px; height: 40px; border: 0; padding: 0;
  border-radius: 50%;
  background: var(--img, none) no-repeat center/100% 100%;
  cursor: pointer;
  transition: transform .15s ease, background-image .15s ease;
  z-index: 2;                   /* 在遮罩之上 */
}
.modal__close:hover{
  /* 移除旋转动画，只保留缩放效果 */
  transform: scale(1.04);
  background-image: var(--img-hover, var(--img));
}

/* hover 换图通用（由 JS 注入变量） */
.img-swap{ background-image: var(--img); }
.img-swap:hover{ background-image: var(--img-hover, var(--img)); }

/* 响应式 */
@media (max-width: 640px){
  .form-grid{ grid-template-columns: 1fr; }
  .modal__header h2{ font-size: 28px; }
}

/* 标题与副标题居中 */
.modal__header{ text-align:center; }

/* 去掉 X 的样式（可删除原来的 .modal__close 相关规则） */

/* 必填红星：在输入框内左侧绘制，文本自动右移 */
.field.required{ position:relative; }
.field.required::before{
  content:"*";
  position:absolute;
  left:12px;
  top:12px;                      /* 左上对齐 */
  transform:none;                /* 取消垂直居中 */
  color:#ff4d4f;                 /* 红色 */
  font-size:18px;
  font-weight:700;
  pointer-events:none;
  line-height:1;
}
.field.required input,
.field.required textarea{
  padding-left:30px;             /* 给红星留空间 */
}

.field--full.required::before{
  top: 12px;            /* 与普通输入框保持一致的左上对齐 */
  left: 12px;
  transform: none;      /* 取消垂直居中 */
}
/* textarea 的星也垂直居中，如果想靠上可改为 top:16px; transform:none; */