/* ============================================================
   XuTurn official site — v2 redesign
   Light, airy, professional. Blue used ONLY as accent;
   the colorful app logo sits directly on light surfaces.
   ============================================================ */
:root {
  --primary: #2563EB;
  --primary-700: #1D4FD7;
  --primary-900: #0B1530;
  --primary-50: #EAF1FE;
  --ink: #101828;
  --ink-2: #344054;
  --muted: #667085;
  --bg: #FFFFFF;
  --bg-soft: #F6F8FC;
  --card: #FFFFFF;
  --line: #E6EAF2;
  --radius: 16px;
  --maxw: 1120px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 10px 30px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 24px 60px rgba(13, 42, 100, 0.16);
}

* { 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", "Noto Sans CJK SC", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary-700); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 62px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 9px; object-fit: cover; flex: none;
  box-shadow: var(--shadow-sm), 0 0 0 1px rgba(16, 24, 40, 0.06);
}
.nav { display: flex; align-items: center; gap: 20px; }
.nav > a { color: var(--ink-2); font-size: 14px; font-weight: 500; }
.nav > a:hover { color: var(--primary-700); text-decoration: none; }
.lang-switch { display: flex; gap: 4px; align-items: center; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.lang-switch a {
  font-size: 13px; padding: 4px 11px; border-radius: 999px; color: var(--muted); font-weight: 600;
}
.lang-switch a:hover { text-decoration: none; color: var(--ink); }
.lang-switch a.active { background: var(--ink); color: #fff; }

/* ---------- Hero (light, logo shown directly) ---------- */
.hero {
  position: relative; overflow: hidden; text-align: center;
  padding: 46px 0 42px;
  background:
    radial-gradient(640px 320px at 12% -6%, rgba(37, 99, 235, 0.09), transparent 62%),
    radial-gradient(560px 300px at 88% 4%, rgba(14, 165, 233, 0.10), transparent 62%),
    radial-gradient(760px 380px at 50% 116%, rgba(37, 99, 235, 0.06), transparent 60%),
    linear-gradient(180deg, #FCFDFF 0%, #F5F8FD 100%);
}
.hero .container { position: relative; z-index: 1; }
.hero-logo {
  width: 78px; height: 78px; border-radius: 20px; object-fit: cover;
  margin: 0 auto 16px;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(16, 24, 40, 0.06);
}
.badges { display: flex; gap: 10px; justify-content: center; margin: 0 0 14px; flex-wrap: wrap; }
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 600; padding: 5px 13px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.85); border: 1px solid var(--line); color: var(--ink-2);
  box-shadow: var(--shadow-sm);
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
.hero h1 {
  font-size: 42px; margin: 0 0 8px; font-weight: 800; letter-spacing: -1px; line-height: 1.15;
}
.hero .tagline {
  font-size: 19px; font-weight: 700; margin: 0 auto 8px; max-width: 680px;
  background: linear-gradient(92deg, #2563EB, #0EA5E9);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { font-size: 15.5px; color: var(--muted); max-width: 600px; margin: 0 auto 20px; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 12px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(37, 99, 235, 0.30); }
.btn-primary:hover { background: var(--primary-700); }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--line); box-shadow: var(--shadow-sm); }
.btn-outline:hover { border-color: #C6D2E8; }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--primary-700); background: var(--primary-50);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 14px;
}
.section-head h2 { font-size: 32px; margin: 0 0 12px; font-weight: 800; letter-spacing: -0.5px; }
.section-head p { color: var(--muted); margin: 0 auto; max-width: 640px; font-size: 15.5px; }

/* ---------- Features ---------- */
#features { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 18px;
}
.feature-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #D5DFF0; }
.feature-card .ic {
  width: 46px; height: 46px; border-radius: 13px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800;
}
.feature-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 700; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
/* per-card accent hues (soft pastel chip + strong glyph) */
.ic.c1 { background: #EAF1FE; color: #2563EB; }
.ic.c2 { background: #EEE9FE; color: #7C3AED; }
.ic.c3 { background: #E0F5F1; color: #0D9488; }
.ic.c4 { background: #FEF3E2; color: #D97706; }
.ic.c5 { background: #FDE8EC; color: #E11D48; }
.ic.c6 { background: #E0F2FE; color: #0284C7; }
.ic.c7 { background: #E9EDEF; color: #334155; }

/* ---------- Screenshots (real captures) ---------- */
.shots-section { background: var(--bg); }
.shots { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 22px; max-width: 980px; margin: 0 auto; }
.shot {
  position: relative; border-radius: 26px; padding: 10px 10px 14px;
  background: linear-gradient(180deg, #FBFCFF, #EFF3FB);
  border: 1.5px solid #DCE4F2;
  box-shadow: var(--shadow-md);
}
.shot img { border-radius: 18px; width: 100%; display: block; }
.shot .shot-label { text-align: center; font-weight: 700; color: var(--primary-700); margin-top: 12px; font-size: 15px; }

/* ---------- Promo showcase (in hero, first screen) ---------- */
.promo-figure {
  max-width: 920px; margin: 30px auto 0; background: #fff;
  border: 1px solid var(--line); border-radius: 18px; padding: 12px;
  box-shadow: var(--shadow-md);
}
.promo-figure img { border-radius: 10px; width: 100%; }

/* ---------- Download ---------- */
#download { background: var(--bg-soft); border-top: 1px solid var(--line); }
.dl-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.dl-card {
  display: flex; align-items: center; gap: 18px;
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 18px 22px; box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease;
}
.dl-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.dl-icon { width: 46px; height: 46px; flex: none; display: flex; align-items: center; justify-content: center; }
.dl-icon svg { width: 100%; height: 100%; }
.dl-icon img { width: 100%; height: 100%; object-fit: contain; }
.dl-icon.appteka { background: linear-gradient(135deg, #16a34a, #65a30d); border-radius: 10px; box-shadow: 0 1px 2px rgba(0,0,0,0.06); }
.dl-icon.appteka svg { width: 26px; height: 26px; }
.dl-info { flex: 1; min-width: 0; }
.dl-info h3 { margin: 0; font-size: 16px; font-weight: 700; }
.dl-info p { margin: 2px 0 0; font-size: 13.5px; color: var(--muted); }
.dl-btn {
  flex: none; display: inline-flex; align-items: center; justify-content: center;
  min-width: 96px; padding: 9px 20px; border-radius: 10px;
  border: 1.5px solid var(--primary); color: var(--primary); background: #fff;
  font-weight: 700; font-size: 14px;
}
.dl-btn:hover { text-decoration: none; background: var(--primary-50); }
.dl-btn.soon { border-color: transparent; background: #E9EDF4; color: #98A2B3; cursor: not-allowed; }
.dl-btn.soon:hover { background: #E9EDF4; }

/* ---------- Privacy promise ---------- */
.promise { background: var(--bg-soft); border-top: 1px solid var(--line); }
.promise-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
.promise-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm);
}
.promise-item .check {
  width: 30px; height: 30px; border-radius: 50%; margin-bottom: 12px;
  display: flex; align-items: center; justify-content: center;
  background: #E5F5EE; color: #12915F; font-size: 15px; font-weight: 800;
}
.promise-item h4 { margin: 0 0 6px; font-size: 15.5px; color: var(--ink); font-weight: 700; }
.promise-item p { margin: 0; font-size: 13.5px; color: var(--muted); }

/* ---------- CTA band ---------- */
.cta-band {
  text-align: center; color: #fff; border-radius: 24px; padding: 56px 28px;
  background:
    radial-gradient(420px 200px at 18% 0%, rgba(59, 130, 246, 0.35), transparent 62%),
    radial-gradient(420px 220px at 84% 100%, rgba(14, 165, 233, 0.28), transparent 62%),
    linear-gradient(135deg, #0D1B3E, #0B1530);
  box-shadow: var(--shadow-lg);
}
.cta-band h2 { margin: 0 0 10px; font-size: 28px; font-weight: 800; letter-spacing: -0.4px; }
.cta-band p { opacity: 0.82; margin: 0 0 26px; font-size: 15px; }
.cta-band .btn-primary { background: #fff; color: var(--primary-900); box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35); }
.cta-band .btn-primary:hover { background: #EFF4FF; }
.cta-band .btn-outline { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.35); box-shadow: none; }
.cta-band .btn-outline:hover { border-color: rgba(255, 255, 255, 0.6); }

/* ---------- Footer ---------- */
.site-footer { background: var(--primary-900); color: #B9C2D8; padding: 48px 0 28px; font-size: 14px; }
.site-footer a { color: #B9C2D8; }
.site-footer a:hover { color: #fff; }
.site-footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
.site-footer h4 { color: #fff; font-size: 14px; margin: 0 0 12px; font-weight: 700; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 9px; }
.site-footer .cols > div > p { margin: 0; font-size: 13.5px; opacity: 0.85; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.10); margin-top: 30px; padding-top: 18px; font-size: 12.5px; color: #7E89A6; }

/* ---------- Privacy doc (shared with privacy pages) ---------- */
.doc {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 40px; margin: 32px 0 48px; box-shadow: var(--shadow-sm);
}
.doc h1 { font-size: 28px; margin: 0 0 6px; letter-spacing: -0.4px; }
.doc .updated { color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.doc h2 { font-size: 20px; margin: 30px 0 10px; padding-top: 14px; border-top: 1px solid var(--line); }
.doc h2:first-of-type { border-top: none; }
.doc p, .doc li { color: var(--ink-2); font-size: 15px; }
.doc ul { padding-left: 22px; }
.doc strong { color: var(--primary-900); }
.doc .toc { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 18px 0; }
.doc .toc a { font-weight: 500; }

/* ---------- Sibling app pill (first-screen cross link) ---------- */
.sibling-pill {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 auto 14px;
  padding: 8px 18px 8px 10px; background: #fff; border: 1px solid var(--line);
  border-radius: 999px; font-size: 13.5px; color: var(--muted);
  box-shadow: var(--shadow-sm); transition: border-color .15s ease, box-shadow .15s ease;
}
.sibling-pill:hover { text-decoration: none; border-color: #C6D2E8; box-shadow: var(--shadow-md); }
.sibling-pill img { width: 28px; height: 28px; border-radius: 8px; object-fit: cover; flex: none; }
.sibling-pill strong { color: var(--ink); font-weight: 700; }
.sibling-pill .arrow { color: var(--primary-700); font-weight: 700; margin-left: 2px; }
.sibling-pill .tag { flex: none; font-size: 11px; font-weight: 700; color: var(--primary-700); background: var(--primary-50); padding: 2px 8px; border-radius: 999px; margin-right: 2px; }
@media (max-width: 640px) { .sibling-pill .desc { display: none; } .sibling-pill { padding: 7px 14px 7px 9px; } }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .hero { padding: 30px 0 26px; }
  .hero-logo { width: 60px; height: 60px; border-radius: 16px; margin-bottom: 12px; }
  .hero h1 { font-size: 30px; }
  .hero .tagline { font-size: 16px; }
  .hero .lead { font-size: 14px; margin-bottom: 16px; }
  .nav { gap: 12px; }
  .nav > a.hide-sm { display: none; }
  section { padding: 48px 0; }
  .section-head { margin-bottom: 30px; }
  .section-head h2 { font-size: 24px; }
  .doc { padding: 24px; }
  .site-footer .cols { grid-template-columns: 1fr; }
  .shot { padding: 8px 8px 12px; border-radius: 22px; }
  .shot img { border-radius: 15px; }
  .promo-figure { margin-top: 18px; padding: 7px; border-radius: 12px; }
  .promo-figure img { border-radius: 7px; }
  .dl-card { padding: 14px 16px; gap: 13px; }
  .dl-icon { width: 38px; height: 38px; }
  .dl-btn { min-width: 84px; padding: 8px 14px; }
  .cta-band { padding: 42px 20px; border-radius: 18px; }
}
@media (max-width: 420px) {
  .brand span.name { display: none; }
  .lang-switch a { padding: 4px 8px; }
}