:root {
  --brand: #e5883a;
  --brand-light: #f09a4f;
  --brand-dark: #c96d26;
  --accent: #2b5278;
  --accent-light: #3a8bc8;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --bg-muted: #eef2f7;
  --text: #1a1f2c;
  --text-secondary: #5b6b7d;
  --text-muted: #8b9bb4;
  --border: #e2e8f0;
  --success: #5db57e;
  --radius: 12px;
  --shadow: 0 10px 40px rgba(0,0,0,0.08);
  --shadow-sm: 0 4px 16px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-light); }
img { max-width: 100%; height: auto; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--text); }
.logo-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  display: grid; place-items: center; color: #fff; font-size: 14px;
}
.nav { display: flex; gap: 28px; align-items: center; }
.nav a { color: var(--text-secondary); font-size: 15px; font-weight: 500; }
.nav a:hover, .nav a.active { color: var(--brand); }
.nav .btn { margin-left: 4px; }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 22px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: none; cursor: pointer; transition: transform .15s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-light)); color: #fff; box-shadow: 0 6px 20px rgba(229,136,58,0.28); }
.btn-primary:hover { box-shadow: 0 8px 26px rgba(229,136,58,0.36); color: #fff; }
.btn-secondary { background: var(--bg-muted); color: var(--text); }
.btn-secondary:hover { background: var(--border); color: var(--text); }
.btn-ghost { background: transparent; color: var(--accent); padding: 8px 14px; }

/* Hero */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(180deg, #fff8f3 0%, #ffffff 100%);
  padding: 90px 0 70px;
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.hero h1 { font-size: 46px; line-height: 1.15; margin: 0 0 18px; letter-spacing: -1px; }
.hero h1 .accent { color: var(--brand); }
.hero .slogan { font-size: 22px; color: var(--text-secondary); margin-bottom: 28px; }
.hero .lead { font-size: 17px; color: var(--text-secondary); margin-bottom: 32px; max-width: 520px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; margin-top: 36px; }
.hero-stats .num { font-size: 28px; font-weight: 800; color: var(--brand); }
.hero-stats .label { font-size: 13px; color: var(--text-muted); }
.hero-phones { position: relative; display: flex; justify-content: center; gap: 20px; }
.phone-frame {
  width: 240px; border-radius: 32px; overflow: hidden;
  box-shadow: 0 30px 70px rgba(0,0,0,0.18);
  border: 8px solid #1a1f2c; background: #1a1f2c;
}
.phone-frame:nth-child(2) { transform: translateY(40px); }

/* Sections */
.section { padding: 76px 0; }
.section-soft { background: var(--bg-soft); }
.section-title { text-align: center; max-width: 680px; margin: 0 auto 50px; }
.section-title h2 { font-size: 32px; margin: 0 0 12px; }
.section-title p { color: var(--text-secondary); font-size: 17px; }

/* Feature cards */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: transform .2s, box-shadow .2s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-icon {
  width: 50px; height: 50px; border-radius: 14px;
  background: linear-gradient(135deg, #fff0e6, #fff8f3);
  color: var(--brand); display: grid; place-items: center; margin-bottom: 18px;
}
.feature-card h3 { font-size: 18px; margin: 0 0 10px; }
.feature-card p { color: var(--text-secondary); font-size: 15px; margin: 0; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: #fff; border-radius: var(--radius); padding: 24px; border: 1px solid var(--border);
  position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--brand); color: #fff; font-weight: 700;
  display: grid; place-items: center; margin-bottom: 16px;
}
.step h4 { margin: 0 0 8px; font-size: 17px; }
.step p { margin: 0; font-size: 14px; color: var(--text-secondary); }

/* Screenshot gallery */
.gallery { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.shot {
  border-radius: 18px; overflow: hidden; border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); transition: transform .2s;
}
.shot:hover { transform: scale(1.03); }
.shot img { display: block; width: 100%; }

/* Content pages */
.page-hero { background: linear-gradient(135deg, #fff8f3, #ffffff); padding: 60px 0 40px; text-align: center; }
.page-hero h1 { font-size: 34px; margin: 0 0 10px; }
.page-hero p { color: var(--text-secondary); font-size: 16px; margin: 0; }

.content-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; box-shadow: var(--shadow-sm); margin-bottom: 24px;
}
.content-card h2 { font-size: 22px; margin: 28px 0 12px; color: var(--text); }
.content-card h2:first-child { margin-top: 0; }
.content-card p { color: var(--text-secondary); margin: 0 0 14px; }
.content-card ul { color: var(--text-secondary); padding-left: 22px; margin: 0 0 16px; }
.content-card li { margin-bottom: 8px; }
.content-card strong { color: var(--text); }

/* Info list */
.info-list { list-style: none; padding: 0; margin: 0; }
.info-list li {
  display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--border);
}
.info-list li:last-child { border-bottom: none; }
.info-list .icon { color: var(--brand); flex-shrink: 0; margin-top: 2px; }
.info-list h4 { margin: 0 0 4px; font-size: 16px; }
.info-list p { margin: 0; color: var(--text-secondary); font-size: 14px; }

/* Download */
.download-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.download-card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 28px;
  background: #fff; text-align: center; transition: box-shadow .2s;
}
.download-card:hover { box-shadow: var(--shadow); }
.download-card .qr { width: 160px; height: 160px; margin: 0 auto 16px; background: var(--bg-muted); border-radius: 12px; display: grid; place-items: center; color: var(--text-muted); font-size: 13px; }

/* Footer */
.site-footer {
  background: #0f1724; color: #aab8cc; padding: 60px 0 24px; font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
.site-footer .logo { color: #fff; margin-bottom: 14px; }
.site-footer h4 { color: #fff; font-size: 15px; margin: 0 0 16px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #aab8cc; }
.site-footer a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #1e293b; padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer-bottom a { color: #aab8cc; }

/* Mobile */
@media (max-width: 1024px) {
  .features, .steps { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 20px; border-bottom: 1px solid var(--border); gap: 10px; }
  .nav.open { display: flex; }
  .menu-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero h1 { font-size: 32px; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-phones { display: none; }
  .features, .steps, .gallery, .download-options { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .phone-frame:nth-child(2) { transform: none; }
}