/* ============================================================
   调查问卷系统 · 视觉样式（升级版）
   设计语言：柔和渐变背景 + 玻璃质感顶栏 + 卡片化 + 圆角 + 动效
   ============================================================ */
:root {
  --bg-grad1: #eef3ff;
  --bg-grad2: #e8f0fb;
  --panel: #ffffff;
  --panel-soft: #f7f9ff;
  --border: #e6e9f0;
  --border-soft: #eef1f6;
  --text: #1d2430;
  --muted: #7a8696;
  --primary: #4f7cff;
  --primary-2: #7c5cff;
  --primary-grad: linear-gradient(135deg, #4f7cff 0%, #7c5cff 100%);
  --primary-soft: #eef3ff;
  --success: #1fb574;
  --warning: #f5a524;
  --danger: #ef4444;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(17, 24, 39, .06);
  --shadow: 0 6px 24px rgba(31, 39, 51, .08);
  --shadow-lg: 0 18px 50px rgba(79, 124, 255, .18);
  --ring: 0 0 0 4px rgba(79, 124, 255, .15);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, var(--bg-grad1), var(--bg-grad2));
  background-attachment: fixed;
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: .15s; }
button { font-family: inherit; cursor: pointer; }

/* ---------------- 顶栏（玻璃质感） ---------------- */
.topbar {
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(230, 233, 240, .9);
  box-shadow: 0 4px 20px rgba(17, 24, 39, .04);
  padding: 0 24px;
  height: 58px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .logo {
  font-weight: 800;
  font-size: 18px;
  background: var(--primary-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: .3px;
}
.topbar .links { margin-left: auto; display: flex; gap: 18px; align-items: center; }
.topbar .links a { color: var(--muted); font-size: 13px; font-weight: 500; }
.topbar .links a:hover { color: var(--primary); }

.container { max-width: 960px; margin: 26px auto; padding: 0 16px; }
.container.wide { max-width: 1120px; }
.container.narrow { max-width: 680px; }

/* ---------------- 卡片 ---------------- */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 14px; font-size: 18px; font-weight: 700; }
.card h3 { margin: 0 0 10px; font-size: 15px; font-weight: 600; }

/* ---------------- 按钮 ---------------- */
.btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 9px 18px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 500;
  transition: .18s ease;
  box-shadow: var(--shadow-sm);
}
.btn:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn.primary {
  background: var(--primary-grad);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 16px rgba(79, 124, 255, .30);
}
.btn.primary:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 10px 24px rgba(79, 124, 255, .40); }
.btn.danger { color: var(--danger); border-color: #f6cfd0; background: #fff; }
.btn.danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn.success { color: var(--success); border-color: #bfe9d4; }
.btn.success:hover { background: var(--success); color: #fff; border-color: var(--success); }
.btn.sm { padding: 6px 12px; font-size: 12px; box-shadow: none; }
.btn.block { width: 100%; padding: 14px; font-size: 15px; font-weight: 600; margin-top: 18px; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none !important; }

/* ---------------- 表单 ---------------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 7px; font-weight: 500; }
input[type=text], input[type=number], textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 13px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  transition: .15s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--ring);
}
textarea { resize: vertical; min-height: 64px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---------------- 徽章 ---------------- */
.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge.draft { background: #eef1f6; color: var(--muted); }
.badge.published { background: #e3f7ee; color: var(--success); }
.badge.closed { background: #fdeaea; color: var(--danger); }

/* ---------------- 表格 ---------------- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--border); }
th { font-size: 12px; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }

/* ---------------- 问卷列表 ---------------- */
.survey-item {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--panel); margin-bottom: 10px; transition: .18s ease;
  box-shadow: var(--shadow-sm);
}
.survey-item:hover { border-color: #cdd9ff; transform: translateY(-2px); box-shadow: var(--shadow); }
.survey-item .info { flex: 1; min-width: 0; }
.survey-item .info .t { font-weight: 600; font-size: 15px; }
.survey-item .info .m { color: var(--muted); font-size: 12px; margin-top: 3px; }
.survey-item .actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------------- 题目编辑器 ---------------- */
.q-block {
  border: 1px solid var(--border); border-radius: 12px; padding: 16px;
  margin-bottom: 12px; background: var(--panel-soft);
  transition: .18s;
}
.q-block:focus-within { border-color: #cdd9ff; box-shadow: var(--ring); }
.q-block .q-head { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.q-block .q-head .idx {
  font-weight: 700; color: #fff; background: var(--primary-grad);
  width: 26px; height: 26px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-size: 13px; flex: none;
}
.q-block .opt-row { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; }
.q-block .opt-row input { flex: 1; }
.icon-btn {
  border: none; background: transparent; color: var(--muted);
  font-size: 16px; padding: 5px 9px; border-radius: 8px; transition: .15s;
}
.icon-btn:hover { background: #fdeaea; color: var(--danger); }

/* ---------------- 填写页 ---------------- */
.q-fill {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; margin-bottom: 14px; box-shadow: var(--shadow-sm); transition: .2s;
}
.q-fill.error { border-color: var(--danger); background: #fff6f6; }
.q-fill .q-title { font-weight: 600; margin-bottom: 12px; font-size: 15px; }
.q-fill .req { color: var(--danger); margin-left: 4px; }
.opt-label {
  display: flex; align-items: center; gap: 10px; padding: 11px 14px;
  border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px;
  cursor: pointer; transition: .15s; font-size: 14px;
}
.opt-label:hover { border-color: var(--primary); background: #f5f8ff; }
.opt-label:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); box-shadow: var(--ring); }
.opt-label input { margin: 0; accent-color: var(--primary); width: 16px; height: 16px; }
.stars { font-size: 30px; color: #d9dee8; cursor: pointer; user-select: none; letter-spacing: 4px; }
.stars .star { transition: transform .1s, color .1s; display: inline-block; }
.stars .star.active { color: var(--warning); }
.stars .star:hover { transform: scale(1.18); }

/* 填写进度 */
.fill-progress { margin-bottom: 18px; }
.fp-text { font-size: 12px; color: var(--muted); margin-bottom: 6px; font-weight: 500; }
.fp-track { height: 8px; background: var(--border-soft); border-radius: 999px; overflow: hidden; }
.fp-fill { height: 100%; background: var(--primary-grad); border-radius: 999px; transition: width .35s ease; }

/* 提交成功 */
.success-box { text-align: center; padding: 34px 10px; }
.success-box .check {
  font-size: 58px; width: 96px; height: 96px; line-height: 96px; margin: 0 auto 14px;
  border-radius: 50%; background: #e3f7ee; color: var(--success);
  animation: pop .4s ease;
}
.success-box h2 { margin: 6px 0; }
@keyframes pop { 0% { transform: scale(.4); opacity: 0; } 60% { transform: scale(1.12); } 100% { transform: scale(1); opacity: 1; } }

/* ---------------- 统计 ---------------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat-card { background: var(--panel-soft); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat-card .sc-num { font-size: 30px; font-weight: 800; color: var(--primary); }
.stat-card .sc-label { color: var(--muted); font-size: 12px; margin-top: 2px; }
.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; font-size: 13px; }
.bar-row .label { width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); }
.bar-track { flex: 1; height: 18px; background: var(--border-soft); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--primary-grad); border-radius: 999px; transition: width .5s ease; }
.bar-row .val { width: 76px; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---------------- 模态框 ---------------- */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(20, 28, 40, .42);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 50;
  animation: fade .2s ease;
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal-mask .card { animation: rise .25s ease; }
@keyframes rise { from { transform: translateY(16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.empty { text-align: center; color: var(--muted); padding: 44px 0; }
.empty::before { content: "📭"; display: block; font-size: 40px; margin-bottom: 10px; opacity: .6; }
.toast {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
  background: #1f2733; color: #fff; padding: 11px 22px; border-radius: 10px;
  font-size: 13px; z-index: 100; opacity: 0; transition: .25s; pointer-events: none;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .split { grid-template-columns: 1fr; } }
.muted { color: var(--muted); }
.center-msg { text-align: center; padding: 60px 20px; color: var(--muted); }
.foot { color: var(--muted); font-size: 13px; }

/* ---------------- 首页 Hero ---------------- */
.home-wrap { max-width: 900px; margin: 0 auto; padding: 78px 20px 64px; text-align: center; }
.home-wrap h1 {
  font-size: 42px; font-weight: 800; margin: 0 0 14px; letter-spacing: .5px;
  background: var(--primary-grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.home-wrap .sub { color: var(--muted); font-size: 16px; margin: 0 0 44px; }
.home-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.home-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 36px 28px; box-shadow: var(--shadow); transition: .25s ease; text-align: left;
  display: block; color: var(--text);
}
.home-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: #cdd9ff; color: var(--text); }
.home-card .hc-emoji {
  font-size: 34px; width: 72px; height: 72px; border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #eef3ff, #e6ecff); margin-bottom: 18px;
}
.home-card h2 { margin: 0 0 8px; font-size: 19px; }
.home-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.home-card code { background: var(--panel-soft); padding: 2px 6px; border-radius: 6px; font-size: 12px; color: var(--primary); }
.home-tip {
  margin-top: 40px; display: inline-block; background: rgba(255,255,255,.7);
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 22px; color: var(--muted); font-size: 13px;
}
@media (max-width: 640px) { .home-cards { grid-template-columns: 1fr; } .home-wrap h1 { font-size: 32px; } }