/* OrderLai 官网样式 */
:root {
  --color-bg: #0a0e17;
  --color-surface: #111827;
  --color-surface-2: #1a2332;
  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;
  --color-primary: #06b6d4;
  --color-primary-hover: #22d3ee;
  --color-accent: #f59e0b;
  --color-border: rgba(255, 255, 255, 0.08);
  --font-display: 'Outfit', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), #0891b2);
  color: #0a0e17;
  border-radius: 8px;
  font-size: 0.85rem;
}

.nav-main {
  display: flex;
  gap: 32px;
}

.nav-main a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

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

.btn-mobile-menu {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.btn-mobile-menu span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #0891b2);
  color: #0a0e17;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary));
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.35);
}

.btn-outline {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.12);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #d97706);
  color: #0a0e17;
}

.btn-accent:hover {
  background: linear-gradient(135deg, #fbbf24, var(--color-accent));
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(6, 182, 212, 0.2), transparent),
              radial-gradient(ellipse 60% 40% at 80% 60%, rgba(245, 158, 11, 0.08), transparent);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, black 30%, transparent 85%);
  pointer-events: none;
}

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

.hero-label {
  font-size: 0.9rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero-title .line {
  display: block;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.section-desc {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 48px;
}

/* Overview */
.overview-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.overview-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.overview-card:hover {
  border-color: rgba(6, 182, 212, 0.3);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.overview-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6, 182, 212, 0.15);
  color: var(--color-primary);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.overview-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.overview-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Platforms */
.platforms {
  background: var(--color-surface);
}

.platform-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.platform-tab {
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}

.platform-tab:hover {
  color: var(--color-text);
  border-color: rgba(255,255,255,0.15);
}

.platform-tab.active {
  color: #0a0e17;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.platform-panels {
  position: relative;
  min-height: 320px;
}

.platform-panel {
  display: none;
  animation: fadeIn 0.35s ease;
}

.platform-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-content {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.panel-content h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 8px;
}

.panel-content > p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: rgba(6, 182, 212, 0.25);
  transform: translateY(-2px);
}

.feature-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  opacity: 0.9;
  margin-bottom: 12px;
  display: block;
}

.feature-card h4 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* CTA */
.cta {
  padding: 60px 0;
}

.cta-box {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(8, 145, 178, 0.1));
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
}

.cta-box h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.cta-box p {
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* Download */
.download {
  background: var(--color-surface);
}

.download-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-top: 40px;
}

.download-buttons {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 16px 28px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-body);
  transition: var(--transition);
  min-width: 260px;
}

.download-btn:hover {
  border-color: var(--color-primary);
  background: rgba(6, 182, 212, 0.08);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.download-btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.download-btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.download-btn-text strong {
  font-size: 1rem;
  font-weight: 600;
}

.download-btn-text em {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: normal;
  font-weight: 400;
  margin-top: 2px;
}

.download-qr {
  text-align: center;
}

.download-qr-label {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.download-qr-placeholder {
  width: 160px;
  height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.download-qr-placeholder img{
  width: 100%;
  height: 100%;
}

.download-qr-placeholder small {
  font-size: 0.75rem;
  margin-top: 8px;
  opacity: 0.8;
}

.download-note {
  margin-top: 32px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Contact */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.contact-card:hover {
  border-color: rgba(6, 182, 212, 0.25);
}

.contact-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

.contact-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.contact-card p {
  color: var(--color-primary);
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  background: var(--color-surface);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}

.footer-brand .logo-icon {
  width: 32px;
  height: 32px;
  font-size: 0.75rem;
}

.footer-copy {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 900px) {
  .overview-cards,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .contact-cards {
    grid-template-columns: 1fr;
  }

  .platform-tabs {
    width: 100%;
  }

  .platform-tab {
    flex: 1;
    min-width: 100px;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .nav-main {
    display: none;
  }

  .btn-mobile-menu {
    display: flex;
  }

  .nav-main.is-open {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
    gap: 16px;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .section {
    padding: 56px 0;
  }

  .cta-box {
    padding: 36px 24px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .platform-tabs {
    flex-direction: column;
  }

  .download-btn {
    min-width: 100%;
  }

  .cta-actions {
    flex-direction: column;
  }

  .cta-actions .btn {
    width: 100%;
  }
}