:root {
  --color-primary: #f59e0b;
  --color-on-primary: #0f172a;
  --color-secondary: #fbbf24;
  --color-accent: #d97706;
  --color-background: #0f172a;
  --color-background-deep: #0b1220;
  --color-foreground: #f8fafc;
  --color-muted: #272f42;
  --color-muted-foreground: #94a3b8;
  --color-border: #334155;
  --color-destructive: #ef4444;
  --color-ring: #f59e0b;
  --color-success: #059669;
  --color-card: #151c2c;
  --color-card-elevated: #1a2336;
  --shadow-gold: 0 10px 40px rgba(245, 158, 11, 0.18);
  --font-heading: "Lexend", "Source Sans 3", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Sans 3", "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius: 16px;
  --radius-sm: 10px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --z-nav: 20;
  --z-overlay: 30;
  --z-modal: 40;
  --z-toast: 50;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--color-background-deep);
  color: var(--color-foreground);
  line-height: 1.6;
  min-height: 100vh;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 3px;
}

[hidden],
.is-hidden {
  display: none !important;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: var(--z-toast);
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 600;
}

.skip-link:focus {
  top: 12px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(245, 158, 11, 0.16), transparent 55%),
    radial-gradient(700px 420px at 92% 8%, rgba(217, 119, 6, 0.1), transparent 50%),
    linear-gradient(180deg, #0b1220 0%, #0f172a 42%, #0b1220 100%);
}

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

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  height: var(--header-h);
  backdrop-filter: blur(16px);
  background: rgba(11, 18, 32, 0.78);
  border-bottom: 1px solid rgba(51, 65, 85, 0.7);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.02em;
}

.brand-sub {
  display: block;
  font-size: 11px;
  color: var(--color-muted-foreground);
  font-weight: 500;
  letter-spacing: 0.16em;
}

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

.nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  color: var(--color-muted-foreground);
  font-weight: 500;
  border-radius: 8px;
  transition: color 180ms var(--ease), background 180ms var(--ease);
}

.nav a:hover {
  color: var(--color-foreground);
  background: rgba(245, 158, 11, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 600;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease), box-shadow 180ms var(--ease), opacity 180ms var(--ease);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
  background: var(--color-secondary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-foreground);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  background: rgba(245, 158, 11, 0.08);
}

.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  background: transparent;
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.hero,
.section {
  position: relative;
  z-index: 1;
}

.hero {
  padding: 88px 0 72px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: 999px;
  color: var(--color-secondary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  background: rgba(245, 158, 11, 0.08);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.15;
  margin: 20px 0 16px;
  letter-spacing: -0.03em;
}

.gold {
  color: var(--color-primary);
}

.lead {
  font-size: 18px;
  color: #cbd5e1;
  max-width: 540px;
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-panel {
  background: linear-gradient(180deg, rgba(26, 35, 54, 0.92), rgba(15, 23, 42, 0.92));
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-gold);
}

.hero-panel h2 {
  font-family: var(--font-heading);
  font-size: 20px;
  margin: 0 0 8px;
}

.hero-panel p {
  margin: 0 0 20px;
  color: var(--color-muted-foreground);
}

.form {
  display: grid;
  gap: 12px;
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.field input,
.field textarea {
  width: 100%;
  min-height: 48px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: #0f172a;
  padding: 12px 14px;
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.18);
  outline: none;
}

.form-error {
  color: #fca5a5;
  font-size: 13px;
  min-height: 18px;
}

.trust {
  padding: 8px 0 56px;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.trust-item,
.card,
.metric {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.trust-item {
  padding: 20px;
}

.trust-item strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 22px;
  color: var(--color-primary);
}

.trust-item span {
  color: var(--color-muted-foreground);
  font-size: 14px;
}

.section {
  padding: 72px 0;
}

.section-head {
  max-width: 640px;
  margin-bottom: 32px;
}

.section-head h2 {
  font-family: var(--font-heading);
  font-size: clamp(28px, 3vw, 36px);
  margin: 10px 0 12px;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--color-muted-foreground);
}

.about-grid,
.product-grid,
.contact-grid {
  display: grid;
  gap: 20px;
}

.about-grid {
  grid-template-columns: 1.1fr 0.9fr;
}

.product-grid {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  padding: 24px;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.card:hover {
  border-color: rgba(245, 158, 11, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
}

.icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(245, 158, 11, 0.12);
  color: var(--color-primary);
  margin-bottom: 16px;
}

.card h3 {
  font-family: var(--font-heading);
  margin: 0 0 8px;
  font-size: 20px;
}

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

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

.list li {
  display: flex;
  gap: 10px;
  color: #dbe4f0;
}

.list svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-primary);
}

.contact-grid {
  grid-template-columns: 0.9fr 1.1fr;
}

.contact-card {
  padding: 24px;
}

.contact-row {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-row:last-child {
  border-bottom: 0;
}

.contact-row strong {
  display: block;
  font-size: 14px;
}

.contact-row span,
.contact-row a {
  color: var(--color-muted-foreground);
}

.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-border);
  padding: 28px 0 36px;
  color: var(--color-muted-foreground);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer a:hover {
  color: var(--color-primary);
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: var(--z-toast);
  background: #122033;
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: var(--color-foreground);
  padding: 14px 16px;
  border-radius: 12px;
  box-shadow: var(--shadow-gold);
  transform: translateY(16px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.toast.show {
  opacity: 1;
  transform: none;
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(2, 6, 23, 0.62);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease);
}

.overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav {
  position: fixed;
  top: var(--header-h);
  right: 16px;
  left: 16px;
  z-index: var(--z-modal);
  background: #151c2c;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 12px;
  display: none;
}

.mobile-nav.open {
  display: grid;
}

.mobile-nav a,
.mobile-nav .btn {
  width: 100%;
  justify-content: flex-start;
}

.admin-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
  position: relative;
  z-index: 1;
}

.sidebar {
  border-right: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.82);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.side-nav {
  display: grid;
  gap: 4px;
}

.side-nav a,
.side-nav button {
  min-height: 44px;
  border: 0;
  background: transparent;
  color: var(--color-muted-foreground);
  border-radius: 10px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-align: left;
}

.side-nav a.active,
.side-nav a:hover,
.side-nav button:hover {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-foreground);
}

.admin-main {
  padding: 28px;
}

.admin-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.metric {
  padding: 18px;
}

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

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
  font-family: var(--font-heading);
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-card);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

th {
  color: var(--color-muted-foreground);
  font-size: 13px;
  font-weight: 600;
}

.status {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status-on {
  background: rgba(5, 150, 105, 0.16);
  color: #34d399;
}

.status-wait {
  background: rgba(245, 158, 11, 0.16);
  color: var(--color-secondary);
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 16px;
  position: relative;
  z-index: 1;
}

.login-card {
  width: min(420px, 100%);
  background: var(--color-card);
  border: 1px solid rgba(245, 158, 11, 0.28);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow-gold);
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

@media (max-width: 960px) {
  .hero-grid,
  .about-grid,
  .product-grid,
  .contact-grid,
  .trust-grid,
  .metrics,
  .admin-shell {
    grid-template-columns: 1fr;
  }

  .nav,
  .header .btn-primary {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .hero {
    padding: 56px 0 40px;
  }

  .section {
    padding: 56px 0;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 10;
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
  }

  .side-nav {
    display: flex;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}