:root {
  --blue-900: #10397e;
  --blue-800: #124aa8;
  --blue-700: #1558d6;
  --blue-600: #2670ef;
  --blue-100: #eaf2ff;
  --blue-050: #f4f8ff;
  --ink-900: #17233c;
  --ink-700: #42506a;
  --ink-500: #69758a;
  --line: #dfe6f1;
  --line-strong: #c7d4e7;
  --surface: #ffffff;
  --bg: #f2f5fa;
  --success: #16865c;
  --danger: #c4404b;
  --shadow: 0 16px 42px rgba(30, 57, 103, 0.10);
  --radius-lg: 22px;
  --radius-md: 14px;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--bg); }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink-900);
  background:
    radial-gradient(circle at 12% 0%, rgba(50, 119, 239, 0.15), transparent 34rem),
    linear-gradient(180deg, #f8fbff 0, var(--bg) 38rem);
  line-height: 1.62;
}

button, input, textarea { font: inherit; }

button { color: inherit; }

.page-bg {
  position: fixed;
  inset: 0 0 auto;
  height: 340px;
  pointer-events: none;
  background: linear-gradient(130deg, rgba(21, 88, 214, 0.10), rgba(92, 148, 244, 0.02));
  clip-path: polygon(0 0, 100% 0, 100% 68%, 0 100%);
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 8px;
  left: 8px;
  transform: translateY(-150%);
  padding: 8px 12px;
  color: #fff;
  background: var(--blue-900);
  border-radius: 8px;
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  padding: 30px 0 18px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(145deg, var(--blue-600), var(--blue-900));
  border-radius: 13px;
  box-shadow: 0 8px 20px rgba(21, 88, 214, 0.24);
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--blue-700);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-title { margin: 0; font-weight: 760; }

.survey-shell {
  position: relative;
  z-index: 1;
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  outline: none;
}

.card {
  padding: 30px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(205, 216, 232, 0.9);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-card {
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.98), rgba(242,247,255,0.98)),
    var(--surface);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 12px;
  padding: 5px 10px;
  color: var(--blue-800);
  font-size: 0.78rem;
  font-weight: 750;
  background: var(--blue-100);
  border-radius: 999px;
}

.hero-card h1, .admin-card h1 {
  margin: 0;
  font-size: clamp(1.65rem, 4.8vw, 2.45rem);
  line-height: 1.22;
  letter-spacing: -0.035em;
}

.intro-copy {
  margin: 16px 0 0;
  color: var(--ink-700);
  font-size: 1rem;
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 24px 0;
}

.privacy-item {
  min-height: 90px;
  padding: 14px;
  color: var(--ink-700);
  font-size: 0.86rem;
  background: var(--blue-050);
  border: 1px solid #dce8fb;
  border-radius: var(--radius-md);
}

.privacy-item strong { display: block; margin-bottom: 2px; color: var(--ink-900); }

.progress-wrap {
  position: sticky;
  z-index: 5;
  top: 0;
  margin-bottom: 14px;
  padding: 12px 14px;
  background: rgba(248, 251, 255, 0.94);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(30, 57, 103, 0.07);
  backdrop-filter: blur(10px);
}

.progress-meta { display: flex; justify-content: space-between; gap: 12px; color: var(--ink-500); font-size: 0.8rem; }

.progress-track { height: 6px; margin-top: 8px; overflow: hidden; background: #dbe4f1; border-radius: 999px; }

.progress-bar { height: 100%; background: linear-gradient(90deg, var(--blue-700), #4a91ff); border-radius: inherit; transition: width 220ms ease; }

.section-head { margin-bottom: 26px; }

.section-head h1 { margin: 0; font-size: clamp(1.35rem, 4vw, 1.82rem); line-height: 1.3; }

.section-head p { margin: 8px 0 0; color: var(--ink-500); }

.question {
  min-width: 0;
  margin: 0;
  padding: 24px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.question:first-of-type { padding-top: 0; border-top: 0; }

.question legend { width: 100%; padding: 0; font-size: 1.02rem; font-weight: 760; line-height: 1.5; }

.question-tag {
  display: inline-block;
  min-width: 36px;
  margin-right: 8px;
  color: var(--blue-700);
  font-size: 0.76rem;
  font-weight: 800;
}

.question-help { margin: 5px 0 14px; color: var(--ink-500); font-size: 0.82rem; }

.option-list { display: grid; gap: 9px; margin-top: 14px; }

.option-card {
  position: relative;
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  align-items: start;
  padding: 13px 14px;
  cursor: pointer;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.option-card:hover { border-color: #9db9e6; transform: translateY(-1px); }

.option-card:has(input:checked) { background: var(--blue-050); border-color: var(--blue-600); box-shadow: inset 0 0 0 1px rgba(38,112,239,0.12); }

.option-card input { width: 18px; height: 18px; margin: 3px 0 0; accent-color: var(--blue-700); }

.option-label { display: block; color: var(--ink-900); font-size: 0.93rem; line-height: 1.55; }

.other-input-wrap { margin: 9px 0 0 32px; }

.text-input, .text-area {
  width: 100%;
  padding: 12px 14px;
  color: var(--ink-900);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.text-input:focus, .text-area:focus { border-color: var(--blue-600); box-shadow: 0 0 0 3px rgba(38,112,239,0.13); }

.text-area { min-height: 118px; resize: vertical; }

.char-count { margin-top: 4px; color: var(--ink-500); font-size: 0.76rem; text-align: right; }

.matrix-list { display: grid; gap: 14px; margin-top: 14px; }

.matrix-row { padding: 15px; background: #f9fbfe; border: 1px solid var(--line); border-radius: 13px; }

.matrix-title { margin: 0 0 10px; font-size: 0.9rem; font-weight: 700; }

.matrix-scale { display: grid; grid-template-columns: repeat(5, minmax(44px, 1fr)); gap: 6px; }

.scale-option { position: relative; cursor: pointer; }

.scale-option input { position: absolute; width: 1px; height: 1px; opacity: 0.01; }

.scale-face {
  display: grid;
  min-height: 50px;
  place-items: center;
  padding: 5px 2px;
  color: var(--ink-700);
  font-size: 0.72rem;
  line-height: 1.2;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.scale-face strong { display: block; color: var(--ink-900); font-size: 0.95rem; }

.scale-option input:checked + .scale-face { color: var(--blue-800); background: var(--blue-100); border-color: var(--blue-600); box-shadow: inset 0 0 0 1px var(--blue-600); }

.scale-option input:focus-visible + .scale-face { outline: 3px solid rgba(38,112,239,0.25); outline-offset: 2px; }

.scale-option.na { grid-column: 1 / -1; }

.scale-option.na .scale-face { min-height: 36px; }

.form-error {
  margin: 0 0 16px;
  padding: 11px 13px;
  color: #8b2632;
  font-size: 0.86rem;
  background: #fff2f3;
  border: 1px solid #f4cbd0;
  border-radius: 10px;
}

.actions { display: flex; justify-content: space-between; gap: 10px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }

.button {
  min-height: 46px;
  padding: 0 20px;
  cursor: pointer;
  font-weight: 750;
  border: 1px solid transparent;
  border-radius: 12px;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.button:hover { transform: translateY(-1px); }

.button:focus-visible { outline: 3px solid rgba(38,112,239,0.25); outline-offset: 2px; }

.button.primary { color: #fff; background: linear-gradient(135deg, var(--blue-600), var(--blue-800)); box-shadow: 0 8px 18px rgba(21,88,214,0.2); }

.button.secondary { color: var(--blue-800); background: #fff; border-color: #b9cce9; }

.button:disabled { cursor: not-allowed; opacity: 0.55; transform: none; box-shadow: none; }

.review-list { display: grid; gap: 10px; margin-top: 18px; }

.review-item { padding: 13px 14px; background: #f8fafd; border: 1px solid var(--line); border-radius: 11px; }
.review-meta { margin: -10px 0 18px; color: var(--blue-800); font-size: 0.84rem; font-weight: 700; }

.review-item dt { color: var(--ink-500); font-size: 0.78rem; }

.review-item dd { margin: 4px 0 0; font-size: 0.9rem; white-space: pre-wrap; }

.consent-box { margin-top: 18px; padding: 13px 14px; color: var(--ink-700); font-size: 0.84rem; background: #f7f9fc; border-radius: 10px; }

.success-card { text-align: center; }

.success-icon { display: grid; width: 66px; height: 66px; margin: 0 auto 16px; place-items: center; color: #fff; font-size: 1.8rem; background: var(--success); border-radius: 50%; box-shadow: 0 10px 26px rgba(22,134,92,0.25); }

.receipt { margin: 22px 0 0; padding: 14px; text-align: left; background: #f6f9fd; border: 1px solid var(--line); border-radius: 12px; }

.receipt span { display: block; color: var(--ink-500); font-size: 0.74rem; }

.receipt code { overflow-wrap: anywhere; color: var(--ink-900); }

.site-footer { position: relative; z-index: 1; padding: 22px 20px 34px; color: var(--ink-500); font-size: 0.76rem; text-align: center; }

.toast { position: fixed; z-index: 30; right: 18px; bottom: 18px; max-width: min(360px, calc(100% - 36px)); padding: 11px 14px; color: #fff; background: var(--ink-900); border-radius: 10px; box-shadow: var(--shadow); opacity: 0; transform: translateY(12px); pointer-events: none; transition: 180ms ease; }

.toast.show { opacity: 1; transform: translateY(0); }

.admin-body { display: grid; min-height: 100vh; place-items: center; padding: 24px; }

.admin-shell { width: min(680px, 100%); }

.admin-card { padding: 30px; }

.field-label { display: block; margin: 24px 0 7px; font-weight: 720; }

.admin-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 15px; }

.check-line { display: flex; gap: 8px; align-items: center; margin-top: 16px; color: var(--ink-700); font-size: 0.86rem; }

.check-line input { width: 18px; height: 18px; accent-color: var(--blue-700); }

.admin-result { min-height: 48px; margin-top: 16px; padding: 12px; color: var(--ink-700); background: #f7f9fc; border-radius: 10px; }

.privacy-note { margin: 18px 0 0; color: var(--ink-500); font-size: 0.78rem; }

@media (max-width: 640px) {
  .site-header, .survey-shell { width: min(100% - 24px, 820px); }
  .site-header { padding-top: 20px; }
  .card { padding: 20px 17px; border-radius: 18px; }
  .privacy-grid { grid-template-columns: 1fr; }
  .privacy-item { min-height: auto; }
  .progress-wrap { margin-inline: -1px; }
  .question { padding-block: 21px; }
  .matrix-row { padding: 12px 9px; }
  .matrix-scale { gap: 4px; }
  .scale-face { min-height: 48px; font-size: 0.66rem; border-radius: 8px; }
  .actions { position: sticky; z-index: 4; bottom: 0; margin-inline: -17px; padding: 14px 17px calc(14px + env(safe-area-inset-bottom)); background: rgba(255,255,255,0.96); }
  .button { flex: 1; padding-inline: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}