:root {
  --color-primary: #ff6b1a;
  --color-primary-dark: #e95a0d;
  --color-bg: #f5f6f8;
  --color-bg-alt: #ffffff;
  --color-accent: #0f172a;
  --color-text: #1f2933;
  --color-muted: #6b7280;
  --radius: 12px;
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft Yahei", sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
}

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

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

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
}

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

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

.logo-image {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 8px;
  background-color: #f3f4f6;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-size: 18px;
  font-weight: 700;
}

.logo-subtitle {
  font-size: 12px;
  color: var(--color-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
}

.nav a {
  position: relative;
  padding: 4px 0;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.2s ease;
}

.nav a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid #e5e7eb;
  background-color: #ffffff;
  padding: 0 8px;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.nav-toggle span {
  height: 2px;
  background-color: #111827;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.nav-open span:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle.nav-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.nav-open span:nth-child(3) {
  transform: translateY(-3px) rotate(-45deg);
}

.hero {
  padding: 72px 0 56px;
  background: radial-gradient(circle at top left, rgba(255, 107, 26, 0.15), transparent), radial-gradient(circle at bottom right, rgba(15, 23, 42, 0.15), transparent);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 32px;
  align-items: center;
}

.hero-content h1 {
  font-size: 32px;
  margin: 0 0 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-muted);
  margin: 0 0 12px;
}

.hero-highlight {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 20px;
}

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

.hero-visual {
  justify-self: center;
}

.hero-image {
  width: 260px;
  max-width: 100%;
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
  background-color: #f9fafb;
  padding: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.05s ease, box-shadow 0.15s ease;
}

.btn.primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 10px 20px rgba(255, 107, 26, 0.35);
}

.btn.primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn.secondary {
  background-color: #ffffff;
  color: var(--color-accent);
  border-color: #e5e7eb;
}

.btn.secondary:hover {
  background-color: #f3f4f6;
}

.btn-large {
  padding: 12px 28px;
  font-size: 15px;
}

.section {
  padding: 56px 0;
  background-color: var(--color-bg);
}

.section-light {
  background-color: var(--color-bg-alt);
}

.section-accent {
  background: linear-gradient(135deg, #0f172a, #111827);
  color: #e5e7eb;
}

.section-title {
  font-size: 24px;
  margin: 0 0 12px;
  text-align: center;
}

.section-intro {
  margin: 0 0 32px;
  text-align: center;
  font-size: 14px;
  color: var(--color-muted);
}

.section-accent .section-intro {
  color: #9ca3af;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background-color: #ffffff;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-soft);
}

.section-accent .card {
  background: rgba(15, 23, 42, 0.6);
  box-shadow: none;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

.section-accent .card p {
  color: #d1d5db;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background-color: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.step-body h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.step-body p {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 32px;
  align-items: center;
}

.about-text p {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--color-muted);
}

.about-highlight {
  display: grid;
  gap: 16px;
}

.stat {
  background-color: #ffffff;
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow-soft);
}

.stat-number {
  font-size: 22px;
  font-weight: 700;
}

.stat-label {
  font-size: 13px;
  color: var(--color-muted);
  display: block;
  margin-top: 4px;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 32px;
  align-items: center;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 14px;
}

.contact-list li + li {
  margin-top: 6px;
}

.contact-list a {
  color: #f97316;
}

.contact-cta p {
  font-size: 14px;
  color: #d1d5db;
  margin: 0 0 16px;
}

.site-footer {
  background-color: #020617;
  color: #94a3b8;
  padding: 20px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 12px;
}

.footer-brand {
  font-size: 16px;
  font-weight: 600;
  color: #e5e7eb;
}

.footer-company {
  margin-top: 2px;
}

.footer-copy {
  margin-top: 4px;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid #1e293b;
  color: #e5e7eb;
  font-size: 12px;
}

.back-to-top:hover {
  background-color: #020617;
}

.icp {
  margin-top: 6px;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    order: -1;
  }

  .about-layout,
  .contact-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .header-inner {
    height: 64px;
  }

  .nav {
    position: absolute;
    inset: 64px 16px auto;
    background-color: #ffffff;
    border-radius: 16px;
    padding: 12px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    box-shadow: var(--shadow-soft);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.15s ease, transform 0.15s ease;
  }

  .nav.nav-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

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

  .hero {
    padding-top: 56px;
  }

  .section {
    padding: 40px 0;
  }

  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}