/* ===== 电子礼簿登记 · 蓝色科技风公共样式 ===== */
:root{
  --bg:#070b16;
  --bg2:#0b1224;
  --card:rgba(18,28,52,.72);
  --card-solid:#0e1830;
  --line:rgba(95,140,220,.18);
  --line-strong:rgba(95,140,220,.34);
  --text:#e8eefc;
  --muted:#8aa0c8;
  --dim:#5e7299;
  --blue:#2f7dff;
  --blue-l:#5b9bff;
  --cyan:#22d3ee;
  --violet:#7c5cff;
  --gold:#e0b062;          /* 辅助点缀：选中态 / 数字 */
  --red:#ff5d6c;           /* 危险 / 删除 */
  --green:#36d399;
  --radius:14px;
  --r-sm:10px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --glow:0 0 0 1px rgba(47,125,255,.4), 0 8px 26px rgba(47,125,255,.28);
  --font:"PingFang SC","Microsoft YaHei","Helvetica Neue",system-ui,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(1100px 600px at 12% -10%, rgba(47,125,255,.16), transparent 60%),
    radial-gradient(900px 520px at 105% 8%, rgba(34,211,238,.12), transparent 58%),
    radial-gradient(800px 600px at 80% 110%, rgba(124,92,255,.12), transparent 60%);
  background-attachment:fixed;
  -webkit-text-size-adjust:100%;
  min-height:100%;
}
/* 科技网格背景（边缘淡出） */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(95,140,220,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(95,140,220,.05) 1px,transparent 1px);
  background-size:42px 42px;
  -webkit-mask-image:radial-gradient(circle at 50% 40%,#000 0%,transparent 85%);
          mask-image:radial-gradient(circle at 50% 40%,#000 0%,transparent 85%);
}

/* ===== 布局 ===== */
.wrap{max-width:1080px;margin:0 auto;padding:24px 18px 60px}
.center-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.sp{flex:1}
.mt{margin-top:16px}.mb{margin-bottom:16px}

/* ===== 卡片 / 玻璃面板 ===== */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:22px;
}
.tag{display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;
  background:rgba(47,125,255,.14);color:var(--blue-l);border:1px solid var(--line-strong)}
.tag.gold{background:rgba(224,176,98,.14);color:var(--gold);border-color:rgba(224,176,98,.3)}
.tag.green{background:rgba(54,211,153,.14);color:var(--green);border-color:rgba(54,211,153,.3)}
.tag.red{background:rgba(255,93,108,.14);color:var(--red);border-color:rgba(255,93,108,.3)}

/* ===== 文字 ===== */
h1,h2,h3{line-height:1.25;font-weight:700}
.muted{color:var(--muted)}
.dim{color:var(--dim)}
.gold{color:var(--gold)}
.cyan{color:var(--cyan)}
.small{font-size:13px}.xsmall{font-size:12px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  height:42px;padding:0 18px;border-radius:var(--r-sm);
  font-family:var(--font);font-size:15px;font-weight:600;cursor:pointer;
  border:1px solid var(--line-strong);background:rgba(20,32,60,.7);color:var(--text);
  transition:.15s;white-space:nowrap;
  -webkit-tap-highlight-color:transparent;
}
.btn:hover{border-color:var(--blue);background:rgba(30,48,86,.8)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn.primary{background:linear-gradient(180deg,#3a86ff,#2f6fe6);border-color:transparent;
  box-shadow:0 8px 22px rgba(47,125,255,.35)}
.btn.primary:hover{background:linear-gradient(180deg,#4a92ff,#3a7bf0)}
.btn.gold{background:linear-gradient(180deg,#e6bd72,#d6a64f);color:#241a06;border-color:transparent;
  box-shadow:0 8px 22px rgba(224,176,98,.3)}
.btn.ghost{background:transparent}
.btn.danger{border-color:rgba(255,93,108,.5);color:var(--red)}
.btn.danger:hover{background:rgba(255,93,108,.12)}
.btn.sm{height:34px;padding:0 12px;font-size:13px}
.btn.icon{width:42px;padding:0}

/* ===== 表单 ===== */
.field{margin-bottom:14px}
label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:7px}
input[type=text],input[type=password],input[type=number],input[type=email],textarea,select{
  width:100%;height:46px;padding:0 14px;font-size:15px;font-family:var(--font);color:var(--text);
  background:rgba(8,14,28,.8);border:1px solid var(--line);border-radius:var(--r-sm);
  outline:none;transition:.15s;-webkit-appearance:none;
}
textarea{padding:10px 14px;height:auto;line-height:1.5;resize:vertical}
input:focus,textarea:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,125,255,.18);background:#0a1226}
::placeholder{color:#46587a}
select option{background:#0b1224;color:var(--text)}

/* ===== 顶栏 ===== */
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:12px;
  flex-wrap:wrap;row-gap:8px;
  padding:10px 16px;background:rgba(8,13,26,.7);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)}
.topbar .brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:16px;flex:0 0 auto;white-space:nowrap}
.seal{width:30px;height:30px;flex:0 0 auto;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,#2f7dff,#7c5cff);box-shadow:0 4px 12px rgba(47,125,255,.4);font-size:16px}
.topbar .sp{flex:1 1 20px}

/* ===== 验证码 ===== */
.captcha{display:flex;align-items:center;gap:10px}
.captcha canvas{height:46px;border-radius:var(--r-sm);border:1px solid var(--line);cursor:pointer;background:#0a1226;flex:0 0 auto}
.captcha input{flex:1}

/* ===== 表格 ===== */
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
.tbl th{color:var(--muted);font-weight:600;font-size:13px;background:rgba(8,14,28,.4)}
.tbl tr:hover td{background:rgba(47,125,255,.06)}
.tbl .num{font-variant-numeric:tabular-nums;color:var(--gold);font-weight:700;text-align:right}

/* ===== 提示条 / 弹层 ===== */
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);
  background:#0e1830;border:1px solid var(--line-strong);color:var(--text);
  padding:11px 18px;border-radius:12px;font-size:14px;box-shadow:var(--shadow);
  opacity:0;pointer-events:none;transition:.2s;z-index:300;max-width:90%}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}
.mask{position:fixed;inset:0;z-index:200;background:rgba(4,7,15,.6);
  display:none;align-items:center;justify-content:center;padding:16px;backdrop-filter:blur(3px)}
.mask.on{display:flex}
.modal{background:var(--card-solid);border:1px solid var(--line-strong);border-radius:16px;
  max-width:420px;width:100%;padding:24px;box-shadow:var(--shadow)}
.modal h3{margin-bottom:8px;font-size:18px}
.modal .x{position:absolute;top:14px;right:16px;font-size:20px;color:var(--muted);cursor:pointer;background:none;border:none}

/* ===== 网格 / 卡片组 ===== */
.grid{display:grid;gap:16px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:760px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}}

/* ===== 统计块 ===== */
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;box-shadow:var(--shadow)}
.stat .k{font-size:13px;color:var(--muted)}
.stat .v{font-size:26px;font-weight:700;margin-top:4px}
.stat .v.gold{color:var(--gold)}

/* ===== 二维码占位 ===== */
.qr-box{width:200px;height:200px;margin:12px auto;border-radius:14px;
  background:repeating-linear-gradient(45deg,#0a1226,#0a1226 10px,#0d1730 10px,#0d1730 20px);
  border:1px dashed var(--line-strong);display:grid;place-items:center;color:var(--dim);font-size:13px;text-align:center}

/* ===== 滚动条 ===== */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:rgba(95,140,220,.3);border-radius:6px}
::-webkit-scrollbar-track{background:transparent}

/* ===== 工具类 ===== */
.hide{display:none!important}
.fade{animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}