:root {
  color-scheme: light;
  --bg-start: #f7f9fc;
  --bg-mid: #eef3f9;
  --bg-end: #f8fafc;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: rgba(255, 255, 255, 0.92);
  --ink: #0f172a;
  --muted: #5b6779;
  --line: rgba(148, 163, 184, 0.22);
  --accent: #f18a00;
  --accent-deep: #db6d00;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg-mid);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "IBM Plex Sans", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(241, 138, 0, 0.16), transparent 24%),
    radial-gradient(circle at right 18%, rgba(251, 191, 36, 0.12), transparent 18%),
    linear-gradient(180deg, var(--bg-start) 0%, var(--bg-mid) 52%, var(--bg-end) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.2;
  background-image:
    linear-gradient(to right, rgba(15, 23, 42, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black 42%, transparent 92%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Manrope", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  letter-spacing: -0.02em;
}

.page-shell {
  width: min(1120px, calc(100% - 28px));
  margin: 0 auto;
  padding: 14px 0 28px;
}

.page-shell.page-shell-form {
  width: min(980px, calc(100% - 28px));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 6px 0 12px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: linear-gradient(135deg, #020617, #0f172a 42%, var(--accent));
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.13em;
  padding-left: 0.12em;
  box-shadow: var(--shadow);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-text strong {
  font-size: 12px;
  letter-spacing: 0.18em;
}

.brand-text span {
  color: var(--muted);
  font-size: 12px;
}

.top-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font-size: 13px;
  transition: 0.2s ease;
}

.pill-link:hover {
  background: #fff;
}

.hero-panel,
.glass-panel {
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.74));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-panel {
  padding: 16px;
}

.glass-panel {
  padding: 18px;
}

.hero-grid {
  display: grid;
  gap: 16px;
  align-items: center;
}

.hero-grid-assets {
  grid-template-columns: minmax(0, 1.22fr) minmax(228px, 0.78fr);
}

.hero-grid-form {
  grid-template-columns: 1fr;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #64748b;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.hero-title {
  margin-top: 0;
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1.02;
}

.hero-title.hero-title-form {
  font-size: clamp(30px, 4.3vw, 46px);
}

.hero-description {
  margin-top: 10px;
  max-width: 720px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff;
  box-shadow: 0 18px 40px rgba(241, 138, 0, 0.24);
}

.btn-primary:hover {
  filter: brightness(1.02);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.asset-stack {
  display: grid;
  gap: 10px;
}

.asset-stack-compact {
  align-self: start;
}

.title-with-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.logo-tile {
  overflow: hidden;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.logo-tile-inline {
  width: 52px;
  flex: 0 0 52px;
  border-radius: 14px;
}

.logo-tile.logo-tile-small {
  max-width: 170px;
  justify-self: end;
}

.logo-tile img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.info-card {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: var(--radius-lg);
  background: var(--panel-strong);
  padding: 14px;
}

.compact-card {
  padding: 12px;
}

.qr-card {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.qr-card img {
  width: 80px;
  height: 80px;
  border-radius: 16px;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.info-card strong {
  display: block;
  font-size: 16px;
}

.info-card p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.page-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.footer-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.feature-card {
  min-height: 100%;
}

.panel-title {
  margin-top: 8px;
  font-size: 18px;
}

.panel-text {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.mini-list {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.mini-list-tight {
  gap: 8px;
  margin-top: 12px;
}

.mini-list li {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  background: rgba(248, 250, 252, 0.9);
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.65;
  color: #334155;
}

.mini-list-tight li {
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.65;
}

.form-panel {
  margin-top: 10px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field.full {
  grid-column: 1 / -1;
}

.field label,
.question-label {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
}

.field input[type="text"],
.field input[type="email"],
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-size: 15px;
  outline: none;
  transition: 0.2s ease;
}

.field textarea {
  min-height: 110px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  border-color: rgba(241, 138, 0, 0.58);
  box-shadow: 0 0 0 4px rgba(241, 138, 0, 0.12);
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 8px;
}

.option-grid.option-grid-compact {
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.field-title .option-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 10px 14px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  background: rgba(248, 250, 252, 0.92);
  color: #334155;
  font-size: 15px;
  line-height: 1.5;
}

.option-item input {
  margin: 0;
  accent-color: var(--accent);
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.other-input {
  display: none;
  margin-top: 10px;
}

.sub-question-block {
  display: none;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 20px;
  background: rgba(248, 250, 252, 0.9);
}

.submit-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.helper-text {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.error {
  min-height: 18px;
  color: #dc2626;
  font-size: 12px;
  line-height: 1.5;
}

.submit-button[disabled] {
  opacity: 0.72;
  cursor: not-allowed;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.68);
  backdrop-filter: blur(4px);
}

.loading-content {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.loading-spinner {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 3px solid rgba(241, 138, 0, 0.18);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}

.success-panel {
  display: none;
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: 20px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #065f46;
  line-height: 1.8;
  font-size: 15px;
}

.success-panel strong {
  display: block;
  font-size: 20px;
  color: #064e3b;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@media (max-width: 980px) {
  .hero-grid-assets,
  .hero-grid-form {
    grid-template-columns: 1fr;
  }

  .field-title .option-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .logo-tile.logo-tile-small {
    justify-self: start;
    max-width: 140px;
  }
}

@media (max-width: 680px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .page-shell,
  .page-shell.page-shell-form {
    width: min(100% - 24px, 760px);
    padding-top: 14px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-panel,
  .glass-panel {
    border-radius: 28px;
    padding: 16px;
  }

  .hero-title {
    font-size: 32px;
  }

  .title-with-logo {
    gap: 10px;
  }

  .logo-tile-inline {
    width: 44px;
    flex-basis: 44px;
    border-radius: 12px;
  }

  .hero-description,
  .panel-text {
    font-size: 14px;
  }

  .qr-card {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  .qr-card img {
    width: 72px;
    height: 72px;
  }

  .form-grid,
  .option-grid {
    grid-template-columns: 1fr;
  }

  .submit-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }
}