:root {
  --brand: #f97316;
  --brand-2: #fb923c;
  --brand-dark: #ea580c;
  --ink: #1f2937;
  --ink-soft: #4b5563;
  --ink-mute: #6b7280;
  --bg: #ffffff;
  --bg-soft: #fff7ed;
  --line: #f3e6da;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(249, 115, 22, 0.10);
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.brand-ico {
  width: 30px;
  height: 30px;
  filter: drop-shadow(0 4px 8px rgba(249, 115, 22, 0.25));
}

.nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
}

.nav a {
  color: var(--ink-soft);
  font-size: 15px;
  transition: color 0.2s;
}

.nav a:hover { color: var(--brand-dark); }

.nav a.active {
  color: var(--brand-dark);
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 6px 16px rgba(249, 115, 22, 0.28);
}

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

.btn-ghost {
  background: #fff;
  color: var(--brand-dark);
  border: 1.5px solid var(--brand-2);
}

.btn-ghost:hover {
  background: var(--bg-soft);
}

.btn-lg { padding: 14px 26px; font-size: 16px; }

/* Hero */
.hero {
  padding: 96px 0 80px;
  background:
    radial-gradient(900px 500px at 20% -10%, rgba(251, 146, 60, 0.18), transparent 60%),
    radial-gradient(800px 460px at 90% 10%, rgba(249, 115, 22, 0.14), transparent 55%),
    var(--bg);
}

.hero-inner { text-align: center; }

.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--brand-2);
  color: var(--brand-dark);
  font-size: 14px;
  font-weight: 600;
}

.hero h1 {
  margin: 26px 0 12px;
  font-size: clamp(2.4rem, 6vw, 4rem);
  letter-spacing: 0.02em;
  background: linear-gradient(120deg, var(--brand-dark), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lead {
  max-width: 620px;
  margin: 0 auto 32px;
  color: var(--ink-soft);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* Subpage hero */
.subhero {
  padding: 72px 0 56px;
  text-align: center;
  background:
    radial-gradient(700px 360px at 30% -10%, rgba(251, 146, 60, 0.18), transparent 60%),
    radial-gradient(600px 320px at 80% 0%, rgba(249, 115, 22, 0.14), transparent 55%),
    var(--bg);
}

.subhero h1 {
  margin: 18px 0 10px;
  font-size: clamp(2rem, 5vw, 3rem);
  background: linear-gradient(120deg, var(--brand-dark), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subhero p {
  max-width: 620px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 17px;
}

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-soft); }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

.section-head p {
  margin: 0;
  color: var(--ink-mute);
  font-size: 16px;
}

.section-actions {
  text-align: center;
  margin-top: 36px;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(249, 115, 22, 0.16);
}

.card-ico {
  font-size: 30px;
  width: 58px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-soft);
  border-radius: 14px;
  margin-bottom: 18px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.card p {
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-size: 15px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--brand-2);
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 600;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.feature {
  text-align: center;
  padding: 24px 18px;
}

.feature-ico {
  font-size: 32px;
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.feature h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.feature p {
  margin: 0;
  color: var(--ink-mute);
  font-size: 15px;
}

/* About */
.about-box {
  max-width: 720px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 32px;
  box-shadow: var(--shadow);
}

.about-box p {
  margin: 0 0 14px;
  color: var(--ink-soft);
}

.about-box p:last-child { margin-bottom: 0; }

/* Contact box */
.contact-box h3 {
  margin: 0 0 10px;
  font-size: 20px;
  text-align: center;
}

.contact-big {
  text-align: center;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--brand-dark);
  margin: 0 0 8px !important;
  word-break: break-all;
}

.contact-box .section-actions { margin-top: 12px; }

/* CTA */
.section-cta {
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(251, 146, 60, 0.20), transparent 60%),
    var(--bg-soft);
}

.cta-inner { text-align: center; }
.cta-inner h2 { margin: 0 0 8px; font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
.cta-inner p { margin: 0 0 26px; color: var(--ink-soft); }

.contact-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.contact-domains {
  color: var(--ink-mute);
  font-size: 14px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  background: #fff;
}

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

.footer-brand .brand-name { font-size: 16px; }
.copyright { margin: 0; color: var(--ink-mute); font-size: 14px; }

/* Responsive */
@media (max-width: 720px) {
  .header-inner { gap: 14px; }
  .nav { gap: 14px; }
  .header-inner .btn { display: none; }
  .hero { padding: 64px 0 56px; }
  .subhero { padding: 52px 0 44px; }
  .section { padding: 56px 0; }
  .footer-inner { justify-content: center; text-align: center; }
}