:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --panel-2: #eef3f5;
  --text: #101828;
  --muted: #667085;
  --line: #d9dee7;
  --brand: #0f766e;
  --brand-strong: #115e59;
  --accent: #b88935;
  --ink: #0b1220;
  --danger: #b42318;
  --success: #067647;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.75), rgba(244, 246, 248, 0.95) 28%),
    var(--bg);
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.5;
}

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

.shell {
  min-height: 100vh;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(16, 24, 40, 0.08);
  background: rgba(246, 247, 249, 0.88);
  backdrop-filter: blur(18px);
}

.nav-inner,
.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--ink);
  font-size: 12px;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.hero {
  padding: 78px 0 54px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  color: var(--text);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 660px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

.button.primary {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.button.primary:hover {
  background: var(--brand-strong);
}

.dashboard,
.visual-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(16, 24, 40, 0.11);
}

.dashboard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.dots {
  display: flex;
  gap: 6px;
}

.dots span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #cfd5df;
}

.dashboard-body {
  padding: 22px;
}

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

.metric,
.panel,
.auth-card,
.form-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.metric {
  padding: 16px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 24px;
}

.metric span,
.small {
  color: var(--muted);
  font-size: 13px;
}

.chart {
  display: grid;
  align-items: end;
  grid-template-columns: repeat(12, 1fr);
  gap: 8px;
  height: 180px;
  margin-top: 18px;
  padding: 16px;
  border-radius: 8px;
  background: var(--panel-2);
}

.bar {
  min-height: 28px;
  border-radius: 6px 6px 0 0;
  background: var(--brand);
}

.visual-card {
  position: relative;
  margin: 0;
  background: var(--ink);
}

.visual-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

.visual-card figcaption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  color: #fff;
  background: rgba(11, 18, 32, 0.68);
  backdrop-filter: blur(16px);
}

.visual-card figcaption span {
  display: block;
  margin-bottom: 4px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.visual-card figcaption strong {
  font-size: 16px;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 22px;
}

.capability-section {
  padding: 30px 0 44px;
}

.capability-grid,
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.panel {
  padding: 22px;
  min-height: 158px;
}

.panel h3 {
  margin: 0 0 10px;
  font-size: 19px;
}

.panel p {
  margin: 0;
  color: var(--muted);
}

.ai-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 34px;
  align-items: center;
  padding: 36px 0 54px;
}

.ai-copy {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.ai-copy p:not(.eyebrow) {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.ai-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.ai-points span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 8px;
  color: var(--brand-strong);
  background: rgba(15, 118, 110, 0.08);
  font-weight: 700;
  font-size: 13px;
}

.visual-card-dark img {
  aspect-ratio: 16 / 10;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 22px 0 78px;
}

.workflow-item {
  padding: 22px;
  border-top: 2px solid var(--brand);
  background: rgba(255, 255, 255, 0.68);
}

.workflow-item span {
  color: var(--accent);
  font-weight: 800;
}

.workflow-item strong {
  display: block;
  margin-top: 10px;
  font-size: 18px;
}

.workflow-item p {
  margin: 8px 0 0;
  color: var(--muted);
}

.center-wrap {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 32px 20px;
}

.form-card,
.auth-card {
  width: min(460px, 100%);
  padding: 30px;
  box-shadow: 0 18px 64px rgba(16, 24, 40, 0.10);
}

.form-card h1,
.auth-card h1 {
  font-size: 30px;
  line-height: 1.15;
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.field label {
  color: #344054;
  font-size: 14px;
  font-weight: 700;
}

.input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.input:focus {
  border-color: var(--brand);
  outline: 3px solid rgba(31, 122, 104, 0.12);
}

.alert {
  margin: 18px 0 0;
  padding: 12px 14px;
  border-radius: 8px;
  color: var(--danger);
  background: #fff3f0;
  border: 1px solid #ffd6cc;
}

.success {
  color: var(--success);
}

.auth-list {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.auth-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-weight: 700;
}

.footer {
  padding: 26px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 860px) {
  .nav-inner {
    height: auto;
    padding: 16px 0;
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }

  .hero-grid,
  .features,
  .metric-row,
  .capability-grid,
  .ai-section,
  .workflow {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 46px;
  }

  .dashboard-body {
    padding: 16px;
  }
}