:root {
  color-scheme: light;
  --bg: #f4f6f5;
  --surface: #ffffff;
  --surface-2: #f8faf9;
  --text: #15201d;
  --muted: #65726e;
  --line: #dbe4e0;
  --accent: #126b54;
  --accent-2: #285f9d;
  --warn: #9b641b;
  --danger: #ad3e3e;
  --shadow: 0 12px 30px rgba(32, 47, 43, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button,
.button-link,
.file-button {
  border: 0;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  text-decoration: none;
  white-space: nowrap;
}

button.secondary,
.file-button {
  background: #e8efec;
  color: var(--text);
}

button.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.secondary-link {
  background: #e8efec;
  color: var(--text);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--text);
  outline: none;
  padding: 10px 11px;
}

textarea {
  resize: vertical;
  line-height: 1.55;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(18, 107, 84, 0.12);
}

.hidden {
  display: none !important;
}

.public-shell {
  min-height: 100vh;
  background: var(--bg);
}

.public-nav {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 54px);
  border-bottom: 1px solid var(--line);
  background: rgba(244, 246, 245, 0.94);
  backdrop-filter: blur(12px);
}

.public-brand {
  color: var(--text);
  text-decoration: none;
}

.public-brand small {
  color: var(--muted);
}

.public-links {
  display: flex;
  gap: 18px;
  align-items: center;
}

.public-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

.public-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.public-main {
  display: grid;
  gap: 28px;
  padding: 34px clamp(18px, 4vw, 54px) 54px;
}

.public-hero {
  min-height: min(620px, calc(100vh - 92px));
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
}

.public-copy {
  max-width: 680px;
}

.public-copy h1 {
  margin: 0 0 16px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.06;
  letter-spacing: 0;
}

.public-lead {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.product-preview {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 18px;
  min-width: 0;
}

.preview-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 12px;
}

.preview-head span,
.preview-query {
  color: var(--muted);
}

.preview-query {
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-2);
  padding: 10px 12px;
  margin-bottom: 12px;
}

#public-chart {
  width: 100%;
  aspect-ratio: 2.46 / 1;
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.preview-results {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.preview-results div {
  display: grid;
  grid-template-columns: 88px 1fr 54px;
  gap: 10px;
  align-items: center;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-2);
}

.preview-results span {
  color: var(--muted);
}

.preview-results em {
  justify-self: end;
  color: var(--accent);
  font-style: normal;
  font-weight: 800;
}

.public-section {
  scroll-margin-top: 92px;
  display: grid;
  gap: 16px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
}

.section-head h2,
.public-wechat h2 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0;
}

.section-head p,
.public-wechat p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.feature-grid article,
.trial-grid article,
.public-wechat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-grid article,
.trial-grid article {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 18px;
}

.feature-grid h3 {
  margin: 0;
  font-size: 19px;
}

.feature-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.trial-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.trial-grid strong {
  font-size: 19px;
}

.trial-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.public-wechat {
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 22px;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.auth-panel {
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 28px;
  align-items: stretch;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 30px;
}

.auth-panel h1 {
  margin: 0 0 12px;
  font-size: clamp(34px, 6vw, 64px);
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-2);
  font-weight: 700;
}

.muted,
.form-message,
.status-text,
.cost {
  color: var(--muted);
}

.auth-form,
.query-form {
  display: grid;
  gap: 14px;
}

.button-row,
.form-line {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.form-line {
  justify-content: space-between;
}

.form-line label,
.compact label {
  color: var(--muted);
}

.form-line input,
.compact input[type="number"] {
  width: 84px;
  margin-left: 8px;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 248px 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 18px;
  border-right: 1px solid var(--line);
  background: #101917;
  color: #fff;
  padding: 22px 16px;
}

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

.brand-logo {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 8px;
  display: block;
  box-shadow: 0 8px 18px rgba(18, 107, 84, 0.2);
}

.brand small {
  display: block;
  color: #aab6b1;
  margin-top: 2px;
}

.nav {
  display: grid;
  gap: 7px;
}

.nav button,
.logout {
  justify-content: flex-start;
  background: transparent;
  color: #dce5e1;
  border: 1px solid transparent;
}

.nav button.active {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.12);
}

.logout {
  margin-top: auto;
  color: #f1c4c4;
}

.main {
  min-width: 0;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 18px;
}

.topbar h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.user-pill {
  min-width: 220px;
  display: grid;
  gap: 4px;
  justify-items: end;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.user-pill span {
  color: var(--muted);
  max-width: 260px;
  overflow-wrap: anywhere;
}

.view {
  display: none;
}

.view.active {
  display: grid;
  gap: 16px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric,
.panel,
.plan-card,
.result-row {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.metric {
  padding: 16px;
}

.metric span {
  display: block;
  color: var(--muted);
  margin-bottom: 10px;
}

.metric strong {
  font-size: 26px;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  padding: 18px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.panel-head h2 {
  margin: 0;
  font-size: 19px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.quick-grid button {
  background: #eef3f1;
  color: var(--text);
  justify-content: center;
}

.action-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.results-panel {
  min-height: 260px;
}

.results-table {
  display: grid;
  gap: 9px;
}

.result-row {
  display: grid;
  grid-template-columns: 138px 104px minmax(0, 1fr) 94px 110px;
  gap: 12px;
  align-items: start;
  padding: 12px;
}

.result-chart {
  display: block;
  width: 138px;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 7px;
  overflow: hidden;
  background: #f5f8f7;
}

.result-chart img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.result-chart-empty {
  background: transparent;
  border-style: dashed;
}

.result-row strong {
  display: block;
}

.result-row small,
.result-reason {
  color: var(--muted);
}

.result-reason {
  line-height: 1.45;
}

.result-evidence {
  margin-top: 6px;
  font-size: 0.86rem;
  color: #4c635d;
}

.pending-result {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #f7faf9;
}

.pending-result p {
  margin: 6px 0;
  color: var(--muted);
}

.sketch-layout {
  grid-template-columns: minmax(360px, 0.95fr) minmax(360px, 1.05fr);
}

#sketch-canvas {
  width: 100%;
  aspect-ratio: 2 / 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  touch-action: none;
}

.file-button input {
  display: none;
}

.compact {
  margin-top: 12px;
  grid-template-columns: 1fr auto auto;
  align-items: center;
}

.checkbox {
  display: flex;
  gap: 8px;
  align-items: center;
}

.checkbox input {
  width: auto;
}

.plan-card {
  padding: 18px;
  display: grid;
  gap: 12px;
}

.plan-card h3 {
  margin: 0;
  font-size: 18px;
}

.plan-price {
  font-size: 31px;
  font-weight: 800;
}

.plan-price span {
  font-size: 15px;
  color: var(--muted);
}

.wechat-box {
  display: grid;
  gap: 16px;
  max-width: 620px;
}

.kv {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 10px;
  margin: 0;
}

.kv dt {
  color: var(--muted);
}

.kv dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(420px, calc(100vw - 36px));
  background: #111b18;
  color: #fff;
  border-radius: 8px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
  z-index: 10;
}

@media (max-width: 900px) {
  .public-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .public-links,
  .public-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .public-actions button {
    flex: 1 1 130px;
  }

  .public-hero,
  .feature-grid,
  .trial-grid,
  .public-wechat,
  .app-shell,
  .auth-panel,
  .two-col,
  .sketch-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topbar,
  .user-pill {
    align-items: stretch;
    justify-items: start;
  }

  .topbar {
    flex-direction: column;
  }

  .result-row {
    grid-template-columns: 1fr;
  }

  .result-chart {
    width: 100%;
    max-width: 320px;
  }

  .compact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .public-main {
    padding: 22px 16px 42px;
  }

  .public-hero {
    min-height: auto;
  }

  .product-preview {
    padding: 14px;
  }

  .preview-results div {
    grid-template-columns: 1fr auto;
  }

  .preview-results span {
    grid-column: 1 / -1;
  }

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

  .main {
    padding: 16px;
  }

  .metrics {
    grid-template-columns: 1fr;
  }
}