:root {
  --bg: #f5f7fd;
  --surface: #ffffff;
  --ink: #16213a;
  --muted: #55607a;
  --line: #dfe5f4;
  --brand: #3b66d9;
  --brand-ink: #ffffff;
  --brand-soft: #e6edff;
  --hero: linear-gradient(160deg, #4a78ea 0%, #3552c9 100%);
  --radius: 16px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1424;
    --surface: #161e33;
    --ink: #e9eefc;
    --muted: #9aa6c4;
    --line: #26304c;
    --brand: #7c9cff;
    --brand-ink: #0e1424;
    --brand-soft: #1d2a4f;
    --hero: linear-gradient(160deg, #1f3a8a 0%, #162a66 100%);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 var(--font);
}
a { color: var(--brand); text-underline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
code { font: 0.92em var(--mono); background: var(--brand-soft); padding: 0.1em 0.4em; border-radius: 6px; word-break: break-all; }

.wrap { width: min(1080px, 100% - 32px); margin-inline: auto; }

/* header */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; margin-right: auto; }
.brand span { white-space: nowrap; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav { display: flex; align-items: center; gap: 4px 18px; flex-wrap: wrap; justify-content: flex-end; font-size: 15px; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav .lang { border: 1px solid var(--line); border-radius: 999px; padding: 0 12px; color: var(--ink); }

/* hero */
.hero { background: var(--hero); color: #fff; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 32px; align-items: center; padding-block: 56px; }
.hero h1 { font-size: clamp(30px, 5vw, 48px); line-height: 1.2; margin: 0 0 16px; letter-spacing: -0.01em; }
.hero p { margin: 0 0 24px; font-size: 18px; opacity: 0.92; max-width: 34em; }
.hero .shots-hero { justify-self: center; width: min(280px, 70%); filter: drop-shadow(0 24px 40px rgba(8, 18, 60, 0.45)); }
.hero .shots-hero img { border-radius: 28px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn { display: inline-block; padding: 11px 22px; border-radius: 999px; background: #fff; color: #274ac0; font-weight: 600; text-decoration: none; }
.btn.ghost { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, 0.6); }
.badge { display: inline-block; padding: 6px 14px; border-radius: 999px; background: rgba(255, 255, 255, 0.16); font-size: 14px; }

/* sections */
section { padding-block: 56px; }
section h2 { font-size: clamp(24px, 3.5vw, 32px); line-height: 1.3; margin: 0 0 8px; }
section .lede { color: var(--muted); margin: 0 0 28px; max-width: 40em; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

.gallery { display: flex; gap: 16px; overflow-x: auto; padding: 4px 16px 20px; scroll-snap-type: x proximity; -webkit-overflow-scrolling: touch; }
.gallery img { width: 240px; flex: none; border-radius: 22px; border: 1px solid var(--line); scroll-snap-align: start; }
.gallery-wrap { width: min(1080px, 100%); margin-inline: auto; }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.steps li { counter-increment: s; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px 16px 60px; position: relative; }
.steps li::before { content: counter(s); position: absolute; left: 18px; top: 14px; width: 30px; height: 30px; border-radius: 50%; background: var(--brand); color: var(--brand-ink); display: grid; place-items: center; font-weight: 700; }
.steps li small { display: block; color: var(--muted); }

.band { background: var(--brand-soft); }
.ticks { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 8px; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 700; }

/* text pages */
.page { padding-block: 40px 64px; }
.page .wrap { width: min(760px, 100% - 32px); }
.page h1 { font-size: clamp(28px, 4vw, 38px); line-height: 1.25; margin: 0 0 12px; }
.page h2 { font-size: 22px; margin: 40px 0 8px; line-height: 1.35; scroll-margin-top: 76px; }
.page h3 { font-size: 17px; margin: 24px 0 4px; }
.page p, .page li { color: var(--ink); }
.page ul, .page ol { padding-left: 1.4em; }
.page li { margin: 4px 0; }
.page .steps, .page .ticks { padding-left: 0; }
.page .steps li { margin: 0; }
.page blockquote { margin: 0 0 24px; padding: 10px 16px; border-left: 4px solid var(--brand); background: var(--brand-soft); border-radius: 0 10px 10px 0; color: var(--muted); font-size: 15px; }
.page .table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.page table { width: 100%; border-collapse: collapse; font-size: 15px; }
.page th, .page td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.page th { background: var(--brand-soft); }
.page tr:last-child td { border-bottom: 0; }
.page details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 4px 16px; margin: 10px 0; }
.page summary { cursor: pointer; font-weight: 600; padding: 10px 0; }
.page details p { margin: 0 0 12px; color: var(--muted); }
.contact { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; margin: 16px 0; }
.contact p { margin: 2px 0; }

/* footer */
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding-block: 32px; }
.site-footer .wrap { display: grid; gap: 8px; }
.site-footer a { color: var(--muted); }
.site-footer .links { display: flex; flex-wrap: wrap; gap: 4px 18px; }

@media (max-width: 820px) {
  .hero .wrap { grid-template-columns: 1fr; padding-block: 40px; text-align: left; }
  .hero .shots-hero { width: min(220px, 60%); justify-self: start; }
  .features { grid-template-columns: 1fr; }
  section { padding-block: 40px; }
}
@media (max-width: 560px) {
  .site-header .wrap { flex-wrap: wrap; min-height: 0; padding-block: 8px; gap: 4px 12px; }
  .nav { font-size: 14px; gap: 2px 12px; }
  .nav .lang { padding: 0 10px; }
}
@media (min-width: 821px) and (max-width: 1000px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}