:root {
  --page-bg: #f7f9fc;
  --panel-bg: #ffffff;
  --panel-border: #dfe6f1;
  --section-bg: #ffffff;
  --section-border: #e4eaf3;
  --row-bg: #ffffff;
  --field-border: #d5deeb;
  --text: #1a2b49;
  --muted: #7b889f;
  --primary: #2f6df6;
  --primary-dark: #1f56d2;
  --primary-soft: #e7f0ff;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --shadow: 0 10px 26px rgba(15, 23, 42, 0.05);
  --preview-gap: 28px;
  --input-preview-scale: 0.88;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: var(--page-bg);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.hidden {
  display: none !important;
}

.workspace {
  min-height: 100vh;
  width: min(1880px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  justify-content: center;
  align-items: flex-start;
  gap: var(--preview-gap);
  padding: 28px 24px 36px;
}

.workspace.has-preview {
  grid-template-columns: minmax(720px, 900px) minmax(820px, 1040px);
}

.input-panel-shell {
  width: min(1260px, 100%);
  margin: 0 auto;
}

.workspace.has-preview .input-panel-shell {
  width: 100%;
  max-width: 900px;
  margin: 0;
}

.input-panel,
.preview-panel {
  width: 100%;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.workspace.has-preview .input-panel {
  width: calc(100% / var(--input-preview-scale));
  transform: scale(var(--input-preview-scale));
  transform-origin: top left;
}

.panel-header,
.preview-header {
  padding: 28px 28px 0;
}

.panel-header {
  padding-bottom: 10px;
}

.panel-header h1,
.preview-header h2 {
  margin: 0;
  color: #183a75;
  font-size: 34px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.panel-header p,
.preview-header p,
.section-head p,
.preview-state p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.panel-body {
  padding: 18px 28px 28px;
}

.section {
  margin-bottom: 20px;
  padding: 18px;
  border: 1px solid var(--section-border);
  border-radius: 18px;
  background: var(--section-bg);
}

.section-title {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 800;
  color: #163a78;
}

.section-head {
  margin-bottom: 14px;
}

.basic-form {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.field.field-span-2 {
  grid-column: span 2;
}

.field label {
  font-size: 14px;
  font-weight: 700;
  color: #21416f;
}

.field input,
.field select {
  width: 100%;
  height: 46px;
  border: 1px solid var(--field-border);
  border-radius: 12px;
  padding: 0 14px;
  font-size: 14px;
  outline: none;
  background: #ffffff;
  color: var(--text);
  transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.field input::placeholder {
  color: #99a6bb;
}

.field input:focus,
.field select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(47, 109, 246, 0.14);
  background: #ffffff;
}

.parking-row {
  display: grid;
  grid-template-columns: 1.4fr 1.1fr auto auto;
  gap: 12px;
  align-items: end;
  padding: 16px;
  border: 1px solid #e3e9f2;
  border-radius: 16px;
  background: var(--row-bg);
}

.pile-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr 0.82fr 0.95fr 1.2fr 0.82fr 0.95fr auto auto;
  gap: 12px;
  align-items: end;
  padding: 16px;
  border: 1px solid #e3e9f2;
  border-radius: 16px;
  background: var(--row-bg);
}

.action-btn {
  height: 46px;
  min-width: 46px;
  padding: 0 16px;
  border: none;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
}

.add-btn,
.primary-button {
  background: linear-gradient(180deg, #3877ff 0%, #2f6df6 100%);
  color: #fff;
  box-shadow: 0 8px 18px rgba(47, 109, 246, 0.20);
}

.add-btn:hover,
.primary-button:hover {
  background: linear-gradient(180deg, #2868f4 0%, #215bdd 100%);
}

.remove-btn {
  background: #edf2f8;
  color: #6e7d96;
}

.form-actions {
  margin-top: 8px;
}

.primary-button {
  width: 100%;
  height: 52px;
  border: none;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 800;
}

.primary-button:disabled {
  opacity: 0.72;
  cursor: wait;
}

.error-box {
  margin-bottom: 16px;
  padding: 14px 16px;
  border: 1px solid #fecaca;
  border-radius: 12px;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 14px;
  line-height: 1.6;
}

.preview-panel {
  width: 100%;
  min-height: calc(100vh - 64px);
  padding: 0 24px 24px;
  overflow: hidden;
}

.preview-state,
.preview-container {
  margin-top: 20px;
}

.preview-state {
  min-height: 240px;
  border: 1px dashed #d5dfec;
  border-radius: 16px;
  background: #f9fbfe;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  padding: 24px;
}

.loading-dot {
  width: 42px;
  height: 42px;
  border: 4px solid rgba(47, 109, 246, 0.18);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.preview-frame {
  width: 100%;
  min-height: calc(100vh - 150px);
  border: 1px solid #dde5f0;
  border-radius: 16px;
  background: #fff;
}

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

@media (max-width: 1720px) {
  :root {
    --input-preview-scale: 0.92;
  }

  .workspace.has-preview {
    grid-template-columns: minmax(660px, 820px) minmax(740px, 940px);
  }
}

@media (max-width: 1480px) {
  .workspace,
  .workspace.has-preview {
    grid-template-columns: 1fr;
  }

  .workspace.has-preview .input-panel-shell,
  .input-panel-shell,
  .preview-panel {
    width: 100%;
    max-width: none;
  }

  .workspace.has-preview .input-panel {
    width: 100%;
    transform: none;
  }

  .preview-panel {
    min-height: auto;
  }

  .preview-frame {
    min-height: 760px;
  }
}

@media (max-width: 1200px) {
  .basic-form {
    grid-template-columns: 1fr 1fr;
  }

  .parking-row,
  .pile-row {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .workspace {
    padding: 16px;
  }

  .panel-header,
  .preview-header,
  .panel-body,
  .preview-panel {
    padding-left: 16px;
    padding-right: 16px;
  }

  .panel-header h1,
  .preview-header h2 {
    font-size: 28px;
  }

  .basic-form,
  .parking-row,
  .pile-row {
    grid-template-columns: 1fr;
  }

  .field.field-span-2 {
    grid-column: span 1;
  }

  .action-btn {
    width: 100%;
  }
}