/* ==========================================================================
   问卷系统 · 浅蓝可爱风格
   ========================================================================== */

:root{
  --pink-50:#f0f7ff;
  --pink-100:#e0efff;
  --pink-200:#c5e0f5;
  --pink-300:#a0cceb;
  --pink-400:#7db6dd;
  --pink-500:#5b9bd5;
  --pink-600:#4a86c2;
  --purple-100:#eef5ff;
  --purple-200:#dbeaff;
  --blue-400:#7db6dd;
  --blue-500:#5b9bd5;
  --text-1:#3d4a5c;
  --text-2:#6b7a8f;
  --text-3:#9aa8ba;
  --text-4:#c8d2de;
  --line:#e6eef7;
  --bg-1:#eaf4ff;
  --bg-2:#f0f7ff;
  --white:#ffffff;
  --danger:#ff6b81;
  --success:#6ecb8f;
  --warn:#ffb74d;
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:24px;
  --shadow-sm:0 4px 12px rgba(160,204,235,.20);
  --shadow:0 8px 24px rgba(160,204,235,.28);
  --shadow-lg:0 12px 40px rgba(160,204,235,.35);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Hiragino Sans GB", "Segoe UI", Roboto, sans-serif;
}

*{ box-sizing:border-box; -webkit-tap-highlight-color:transparent; }

html,body{ margin:0; padding:0; }

body{
  font-family:var(--font);
  color:var(--text-1);
  background:linear-gradient(135deg,var(--bg-1) 0%,var(--bg-2) 100%);
  background-attachment:fixed;
  min-height:100vh;
  line-height:1.6;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}

/* ---------- 装饰气泡 ---------- */
body::before,
body::after{
  content:"";
  position:fixed;
  border-radius:50%;
  filter:blur(60px);
  opacity:.55;
  z-index:0;
  pointer-events:none;
}
body::before{ width:280px; height:280px; background:var(--pink-200); top:-100px; left:-100px; }
body::after { width:320px; height:320px; background:var(--purple-200); bottom:-120px; right:-120px; }

/* ---------- 布局 ---------- */
.wrap{
  position:relative;
  z-index:1;
  max-width:720px;
  margin:0 auto;
  padding:40px 18px 80px;
}
.wrap.narrow{ max-width:480px; }

.center{ text-align:center; }

/* ---------- 卡片 ---------- */
.card{
  background:var(--white);
  border-radius:var(--radius-lg);
  padding:28px 24px;
  box-shadow:var(--shadow);
  margin-bottom:18px;
  position:relative;
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;
  top:0; left:0; right:0;
  height:5px;
  background:linear-gradient(90deg,var(--pink-300),var(--pink-500),var(--blue-400));
  opacity:.8;
}

/* ---------- 标题 ---------- */
h1,h2,h3,h4{ color:var(--text-1); margin:0 0 14px; line-height:1.35; font-weight:600; }
h1{ font-size:24px; }
h2{ font-size:20px; }
h3{ font-size:17px; margin-top:8px; }

.page-title{ font-size:22px; margin-bottom:16px; color:var(--pink-500); }

.big-emoji{ font-size:52px; line-height:1; margin-bottom:10px; }

.intro{
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
  margin:12px 0 20px;
}

.muted{ color:var(--text-3); font-size:13.5px; }

a{ color:var(--pink-500); text-decoration:none; transition:color .2s; }
a:hover{ color:var(--pink-600); }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:11px 22px;
  font-size:14.5px;
  font-weight:500;
  font-family:var(--font);
  color:#fff;
  background:linear-gradient(135deg,var(--pink-400) 0%,var(--pink-500) 100%);
  border:none;
  border-radius:999px;
  cursor:pointer;
  transition:all .25s ease;
  box-shadow:0 4px 14px rgba(91,155,213,.35);
  text-decoration:none;
  white-space:nowrap;
  user-select:none;
}
.btn:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 20px rgba(91,155,213,.45);
  color:#fff;
}
.btn:active{ transform:translateY(0); }
.btn:disabled{ opacity:.55; cursor:not-allowed; transform:none; }

.btn-block{ display:flex; width:100%; padding:13px 22px; font-size:15.5px; }

.btn-ghost{
  background:var(--pink-50);
  color:var(--pink-500);
  box-shadow:none;
  border:1.5px solid var(--pink-200);
}
.btn-ghost:hover{
  background:var(--pink-100);
  color:var(--pink-600);
  box-shadow:0 4px 12px rgba(160,204,235,.35);
}

.btn-danger{
  background:linear-gradient(135deg,#ff879c 0%,#ff6b81 100%);
  box-shadow:0 4px 14px rgba(255,107,129,.35);
}
.btn-danger:hover{ box-shadow:0 8px 20px rgba(255,107,129,.45); }

.btn-sm{ padding:6px 14px; font-size:13px; border-radius:999px; }

.btn + .btn{ margin-left:0; }

/* ---------- 表单 ---------- */
.form-grid{ display:flex; flex-direction:column; gap:14px; }
.form-grid label{
  display:block;
  font-size:14px;
  color:var(--text-2);
  font-weight:500;
}
.sec-title{
  font-size:15px;
  color:var(--pink-500);
  margin:6px 0 2px;
  padding-left:10px;
  border-left:3px solid var(--pink-300);
  line-height:1.2;
}

.input{
  display:block;
  width:100%;
  margin-top:6px;
  padding:11px 14px;
  font-size:15px;
  font-family:var(--font);
  color:var(--text-1);
  background:var(--pink-50);
  border:1.5px solid transparent;
  border-radius:var(--radius-sm);
  outline:none;
  transition:all .22s ease;
}
.input:focus{
  background:#fff;
  border-color:var(--pink-300);
  box-shadow:0 0 0 4px rgba(160,204,235,.25);
}
textarea.input{ resize:vertical; min-height:80px; line-height:1.6; }

select.input{
  appearance:none;
  -webkit-appearance:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%235b9bd5' d='M6 8L0 0h12z'/></svg>");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:36px;
}

.check-row{ display:flex; gap:20px; flex-wrap:wrap; }
.check-row label{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-1);
  cursor:pointer;
}
.check-row input[type="checkbox"]{ accent-color:var(--pink-500); width:16px; height:16px; }

.option-label{
  display:flex;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  margin-top:6px;
  background:var(--pink-50);
  border-radius:var(--radius-sm);
  font-size:14.5px;
  color:var(--text-1);
  cursor:pointer;
  transition:background .18s;
}
.option-label:hover{ background:var(--pink-100); }
.option-label input{ accent-color:var(--pink-500); }

/* ---------- 提示条 ---------- */
.alert{
  padding:12px 16px;
  border-radius:var(--radius-sm);
  font-size:14px;
  margin-bottom:14px;
  line-height:1.6;
}
.alert-error{ background:#fff0f2; color:#d64a63; border:1px solid #ffd6dd; }
.alert-info { background:#eef5ff; color:#4b7bd6; border:1px solid #d6e4ff; }
.alert-success{ background:#eefaf1; color:#3fa168; border:1px solid #d6f0df; }
.install-alert{
  margin:14px 0;
  padding:12px 16px;
  background:#fff8e6;
  color:#b8860b;
  border-radius:var(--radius-sm);
  font-size:13.5px;
  border:1px solid #ffedb3;
}

/* ---------- 问卷题目 ---------- */
.question-item{
  padding:16px 0;
  border-bottom:1px dashed var(--line);
}
.question-item:last-child{ border-bottom:none; }

.q-label{
  display:block;
  font-size:15px;
  font-weight:500;
  color:var(--text-1);
  margin-bottom:6px;
  line-height:1.5;
}
.q-hint{ font-size:13px; color:var(--text-3); margin-bottom:6px; }
.required{ color:var(--danger); margin-left:2px; }

.unique-tag,
.badge{
  display:inline-block;
  padding:2px 9px;
  font-size:11.5px;
  border-radius:999px;
  font-weight:500;
  line-height:1.6;
  margin-left:6px;
  vertical-align:middle;
}
.badge{ background:var(--purple-100); color:var(--blue-500); margin-left:0; }
.badge-open { background:#e6f8ed; color:#3fa168; }
.badge-closed{ background:#ffeef2; color:#d64a63; }
.badge-req { background:#fff2e0; color:#d98b16; }
.badge-uniq{ background:#e0efff; color:#4a86c2; }

.unique-tag{
  background:#e0efff;
  color:#4a86c2;
  font-size:11px;
}

/* ---------- 弹窗（自定义） ---------- */
.modal-mask{
  position:fixed;
  top:0; left:0; right:0; bottom:0;
  background:rgba(61,74,92,.45);
  backdrop-filter:blur(3px);
  -webkit-backdrop-filter:blur(3px);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
  z-index:9999;
  animation:fadeIn .22s ease;
}
@keyframes fadeIn{ from{opacity:0} to{opacity:1} }

.modal-box{
  background:#fff;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  width:100%;
  max-width:380px;
  overflow:hidden;
  animation:popIn .28s cubic-bezier(.34,1.56,.64,1);
}
@keyframes popIn{
  from{ opacity:0; transform:scale(.9) translateY(12px) }
  to  { opacity:1; transform:scale(1) translateY(0) }
}

.modal-head{
  padding:16px 20px;
  background:linear-gradient(135deg,var(--pink-100),var(--pink-50));
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-weight:600;
  color:var(--pink-600);
  font-size:15.5px;
}
.modal-close{
  font-size:22px;
  line-height:1;
  cursor:pointer;
  color:var(--pink-400);
  padding:0 4px;
  transition:color .18s;
}
.modal-close:hover{ color:var(--pink-600); }

.modal-body{
  padding:22px 20px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.7;
  word-break:break-word;
}
.modal-body p{ margin:6px 0; }

.modal-foot{
  padding:12px 20px 20px;
  display:flex;
  justify-content:center;
  gap:10px;
}

/* ---------- 表格 ---------- */
.table-scroll{
  overflow-x:auto;
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  background:#fff;
  -webkit-overflow-scrolling:touch;
}
.table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
  min-width:600px;
}
.table th,
.table td{
  padding:12px 14px;
  text-align:left;
  border-bottom:1px solid var(--line);
  vertical-align:middle;
}
.table th{
  background:linear-gradient(180deg,var(--pink-50),#fff);
  color:var(--pink-600);
  font-weight:600;
  font-size:13.5px;
  white-space:nowrap;
}
.table tbody tr:hover{ background:var(--pink-50); }
.table .actions{ white-space:nowrap; }
.table .actions .btn{ margin-right:4px; margin-bottom:4px; }

/* ---------- 页头 ---------- */
.page-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  margin-bottom:18px;
}

/* ---------- 后台 ---------- */
.admin-body{
  background:linear-gradient(135deg,#eaf4ff 0%,#f0f7ff 100%);
  padding-top:0;
}
.admin-nav{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 12px rgba(160,204,235,.15);
}
.nav-inner{
  max-width:1100px;
  margin:0 auto;
  padding:14px 20px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
}
.nav-brand{
  font-size:17px;
  font-weight:600;
  color:var(--pink-500);
  white-space:nowrap;
}
.nav-links{
  display:flex;
  gap:6px;
  flex-wrap:wrap;
}
.nav-links a{
  padding:6px 14px;
  border-radius:999px;
  font-size:14px;
  color:var(--text-2);
  transition:all .2s;
}
.nav-links a:hover{
  background:var(--pink-100);
  color:var(--pink-600);
}
.nav-logout{ color:var(--danger) !important; }
.nav-user{
  max-width:1100px;
  margin:0 auto;
  padding:0 20px 8px;
  font-size:12.5px;
  color:var(--text-3);
}
.admin-main{
  max-width:1100px;
  margin:0 auto;
  padding:26px 20px 60px;
  position:relative;
  z-index:1;
}

/* ---------- 数据概览 ---------- */
.stat-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:14px;
  margin-bottom:20px;
}
.stat-card{
  background:#fff;
  border-radius:var(--radius);
  padding:22px 18px;
  text-align:center;
  box-shadow:var(--shadow-sm);
  transition:transform .22s, box-shadow .22s;
}
.stat-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow);
}
.stat-num{
  font-size:30px;
  font-weight:700;
  color:var(--pink-500);
  line-height:1.1;
  margin-bottom:6px;
}
.stat-label{ font-size:13px; color:var(--text-3); }

/* ---------- 题目列表 ---------- */
.q-list{
  list-style:none;
  padding:0;
  margin:8px 0 0;
}
.q-list li{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  padding:12px 14px;
  background:var(--pink-50);
  border-radius:var(--radius-sm);
  margin-bottom:10px;
  font-size:14px;
}
.q-list-title{ display:flex; align-items:center; gap:6px; flex-wrap:wrap; }
.q-list-title strong{ color:var(--text-1); font-weight:500; }

/* ---------- 二维码 ---------- */
.qr-img{
  max-width:220px;
  width:100%;
  height:auto;
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
}
.qrcode-area{
  display:flex;
  justify-content:center;
  margin-top:10px;
}
.qrcode-area img,
.qrcode-area canvas{
  border-radius:var(--radius-sm);
  background:#fff;
  padding:6px;
}

/* ---------- 链接复制 ---------- */
.link-box{
  display:flex;
  gap:8px;
  margin-top:10px;
  flex-wrap:wrap;
}
.link-input{ flex:1 1 240px; min-width:0; }
.link-extra{
  margin-top:16px;
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}

/* ---------- 底部 ---------- */
.site-footer{
  margin-top:40px;
  padding:22px 18px;
  text-align:center;
  font-size:12.5px;
  color:var(--text-3);
  position:relative;
  z-index:1;
}
.site-footer a{
  color:var(--text-3);
  display:inline-flex;
  align-items:center;
  gap:5px;
  margin:0 8px;
  vertical-align:middle;
}
.site-footer a:hover{ color:var(--pink-500); }
.site-footer img{
  width:14px;
  height:14px;
  vertical-align:middle;
  display:inline-block;
}

/* ---------- Toast ---------- */
.toast{
  position:fixed;
  left:50%;
  bottom:40px;
  transform:translate(-50%,20px);
  background:rgba(61,74,92,.9);
  color:#fff;
  padding:10px 22px;
  border-radius:999px;
  font-size:14px;
  opacity:0;
  transition:all .3s;
  z-index:99999;
  pointer-events:none;
  backdrop-filter:blur(6px);
}
.toast.show{
  opacity:1;
  transform:translate(-50%,0);
}

/* ---------- 响应式 ---------- */
@media (max-width:560px){
  .wrap{ padding:24px 14px 60px; }
  .card{ padding:22px 18px; border-radius:20px; }
  h1{ font-size:21px; }
  .page-title{ font-size:19px; }
  .big-emoji{ font-size:44px; }
  .btn{ padding:10px 18px; font-size:14px; }
  .btn-sm{ padding:5px 12px; font-size:12.5px; }
  .stat-num{ font-size:26px; }
  .modal-box{ max-width:92%; }
  .nav-inner{ padding:12px 14px; }
  .nav-links a{ padding:5px 11px; font-size:13px; }
  .admin-main{ padding:20px 14px 50px; }
  .modal-body{ padding:18px 16px; }
}

/* ---------- 滚动条（桌面） ---------- */
::-webkit-scrollbar{ width:8px; height:8px; }
::-webkit-scrollbar-track{ background:transparent; }
::-webkit-scrollbar-thumb{
  background:var(--pink-200);
  border-radius:999px;
}
::-webkit-scrollbar-thumb:hover{ background:var(--pink-300); }