:root {
  --bg: #070d17;
  --bg-soft: #0b1220;
  --card: #101a2b;
  --card-2: #16233a;
  --line: #24344f;
  --text: #e6edf5;
  --muted: #9fb0c7;
  --brand: #38bdf8;
  --brand-2: #4ade80;
  --danger: #f87171;
  --amber: #fbbf24;
  --radius: 14px;
}

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

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1000px 520px at 12% -10%, rgba(56, 189, 248, .16), transparent 60%),
    radial-gradient(900px 520px at 100% 0%, rgba(74, 222, 128, .12), transparent 55%),
    var(--bg);
  color: var(--text);
  font: 15px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  min-height: 100%;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 22px 14px 140px; }

/* ---------- 头部 ---------- */
.hero { margin-bottom: 18px; }
.hero-top { display: flex; gap: 12px; align-items: center; }
.logo {
  width: 46px; height: 46px; flex: 0 0 46px; border-radius: 13px;
  display: grid; place-items: center; color: #052033;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 8px 22px rgba(56, 189, 248, .25);
}
.brand { font-size: 12.5px; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; }
.hero h1 { margin: 2px 0 0; font-size: 23px; line-height: 1.25; }
.intro { color: var(--muted); font-size: 13.5px; margin: 14px 0 0; }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chip {
  font-size: 12px; color: var(--brand); background: rgba(56, 189, 248, .1);
  border: 1px solid rgba(56, 189, 248, .28); border-radius: 999px; padding: 4px 11px;
}
.chip.green { color: var(--brand-2); background: rgba(74, 222, 128, .1); border-color: rgba(74, 222, 128, .28); }
.chip.amber { color: var(--amber); background: rgba(251, 191, 36, .1); border-color: rgba(251, 191, 36, .3); }

/* ---------- 卡片 ---------- */
.card {
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin: 0 0 14px;
}
.card-title { margin: 0; font-size: 16px; }
.card-desc { margin: 6px 0 14px; color: var(--muted); font-size: 13px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }

.field { display: block; }
.label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.req { color: var(--danger); font-size: 11px; font-weight: 600; }
.opt { color: var(--muted); font-size: 11px; }
input[type=text], select, textarea {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px; padding: 11px 12px;
  font: inherit; outline: none; transition: border-color .15s, box-shadow .15s;
}
input[type=text]:focus, select:focus, textarea:focus {
  border-color: var(--brand); box-shadow: 0 0 0 3px rgba(56, 189, 248, .14);
}
textarea { min-height: 116px; resize: vertical; line-height: 1.7; }

/* ---------- 分节 ---------- */
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 10px; margin: 26px 0 10px; padding-left: 2px;
}
.section-head h2 { margin: 0; font-size: 16.5px; }
.section-head .score { font-size: 12px; color: var(--amber); }
.section-desc { color: var(--muted); font-size: 12.5px; margin: 0 0 12px; padding-left: 2px; }

.q {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; margin: 0 0 12px;
}
.q.invalid { border-color: rgba(248, 113, 113, .65); box-shadow: 0 0 0 3px rgba(248, 113, 113, .1); }
.q-head { display: flex; gap: 9px; align-items: flex-start; margin-bottom: 11px; }
.q-no {
  flex: 0 0 26px; height: 26px; border-radius: 8px; display: grid; place-items: center;
  font-size: 12.5px; font-weight: 700; color: #062033; background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.q-text { font-size: 14.5px; line-height: 1.6; }
.q-type { font-size: 11px; color: var(--brand); background: rgba(56, 189, 248, .1);
  border: 1px solid rgba(56, 189, 248, .25); border-radius: 6px; padding: 2px 7px; margin-left: 6px; white-space: nowrap; }

.opts { display: grid; gap: 8px; }
.opt-row {
  display: flex; gap: 10px; align-items: flex-start; cursor: pointer;
  background: var(--bg); border: 1px solid var(--line); border-radius: 11px; padding: 10px 12px;
  transition: border-color .15s, background .15s, transform .1s;
}
.opt-row:active { transform: scale(.995); }
.opt-row:hover { border-color: #35507a; }
.opt-row.on { border-color: var(--brand); background: rgba(56, 189, 248, .09); }
.opt-row .mark {
  flex: 0 0 20px; height: 20px; margin-top: 1px; border-radius: 50%;
  border: 2px solid #3d5379; display: grid; place-items: center; font-size: 11px; color: #062033;
}
.opt-row.multi .mark { border-radius: 6px; }
.opt-row.on .mark { background: var(--brand); border-color: var(--brand); }
.opt-row .txt { font-size: 14px; }
.opt-key { color: var(--muted); font-weight: 700; margin-right: 6px; }

.code {
  background: #060b14; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; margin: 0 0 10px; overflow-x: auto;
  font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #a7f3d0;
  white-space: pre;
}
.hint { font-size: 12px; color: var(--muted); margin: 8px 0 0; }
.counter { font-size: 12px; color: var(--muted); text-align: right; margin-top: 6px; }
.counter.warn { color: var(--amber); }
.counter.err { color: var(--danger); }

/* ---------- 底部提交 ---------- */
.submit-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  display: flex; gap: 14px; align-items: center;
  max-width: 760px; margin: 0 auto; padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  background: rgba(7, 13, 23, .92); backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
}
.progress { flex: 1; min-width: 0; }
.progress-text { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.progress-text b { color: var(--brand); }
.progress-track { height: 6px; border-radius: 999px; background: #1b2a42; overflow: hidden; }
.progress-fill { height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, var(--brand), var(--brand-2)); transition: width .25s; }

.btn {
  border: 1px solid var(--line); background: var(--card-2); color: var(--text);
  border-radius: 11px; padding: 11px 18px; font: inherit; font-weight: 600; cursor: pointer;
}
.btn.primary {
  border: none; color: #04240f; padding: 12px 22px;
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
  box-shadow: 0 8px 20px rgba(74, 222, 128, .2);
}
.btn.primary:disabled { opacity: .55; cursor: not-allowed; box-shadow: none; }
.btn:active { transform: translateY(1px); }

.tips { display: flex; gap: 7px; color: var(--muted); font-size: 12px; margin: 18px 2px 0; }
.tips svg { flex: 0 0 14px; margin-top: 3px; }

/* ---------- 结果弹层 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 40; display: grid; place-items: center;
  background: rgba(4, 8, 14, .78); backdrop-filter: blur(4px); padding: 20px;
}
.modal[hidden] { display: none; }
.modal-card {
  width: 100%; max-width: 400px; text-align: center;
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--line); border-radius: 18px; padding: 26px 20px;
}
.modal-card h2 { margin: 12px 0 6px; font-size: 19px; }
.modal-desc { color: var(--muted); font-size: 13px; margin: 0 0 14px; }
.ok {
  width: 56px; height: 56px; margin: 0 auto; border-radius: 50%;
  display: grid; place-items: center; color: #052e16;
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
}
.ref { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.ref b { color: var(--brand); font-size: 15px; letter-spacing: .06em; }

.toast {
  position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%);
  background: rgba(248, 113, 113, .95); color: #2b0505; font-size: 13.5px; font-weight: 600;
  padding: 10px 16px; border-radius: 11px; z-index: 50; max-width: 88vw; text-align: center;
}
.toast[hidden] { display: none; }