:root {
  --bg: #ffffff; --bg2: #f6f7fb; --fg: #14161f; --muted: #5d6475; --line: #e6e8f0;
  --brand: #5b4bf5; --brand2: #1aa7c0; --card: #ffffff; --ok: #1f9d55;
  --radius: 16px; --max: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1016; --bg2: #151823; --fg: #eef0f6; --muted: #a0a7b8; --line: #262a38; --card: #171a25; --brand: #8b7dff; --brand2: #3cc8de; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.65 var(--font); color: var(--fg); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--card); padding: 8px 12px; border-radius: 8px; z-index: 10; }

/* header */
header.site { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--fg); }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.nav-links .lang { border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; color: var(--fg); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 10px; width: 40px; height: 36px; color: var(--fg); font-size: 18px; }
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 0; padding: 8px 24px 16px; background: var(--bg); border-bottom: 1px solid var(--line); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; width: 100%; }
}
.lang-hint { background: var(--bg2); border-bottom: 1px solid var(--line); text-align: center; font-size: 14px; padding: 8px; }

/* hero */
.hero { padding: 88px 0 64px; text-align: center; background: radial-gradient(900px 400px at 50% -10%, color-mix(in srgb, var(--brand) 16%, transparent), transparent 70%); }
.hero h1 { font-size: clamp(34px, 6vw, 60px); line-height: 1.15; margin: 0 0 18px; letter-spacing: -0.02em; }
.hero h1 .grad { background: linear-gradient(90deg, var(--brand), var(--brand2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--muted); max-width: 760px; margin: 0 auto 30px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px; font-weight: 600; border: 1px solid var(--line); color: var(--fg); background: var(--card); }
.btn:hover { text-decoration: none; border-color: var(--brand); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.badges { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 26px; }
.badge { font-size: 13px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; background: var(--card); }

/* sections */
section.block { padding: 72px 0; border-top: 1px solid var(--line); }
section.block.alt { background: var(--bg2); }
.kicker { color: var(--brand); font-weight: 700; font-size: 14px; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 8px; }
h2 { font-size: clamp(26px, 3.6vw, 38px); line-height: 1.2; margin: 0 0 14px; letter-spacing: -0.01em; }
.sub { color: var(--muted); max-width: 720px; margin: 0 0 36px; font-size: 17px; }
.grid { display: grid; gap: 18px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g6 { grid-template-columns: repeat(6, 1fr); }
@media (max-width: 960px) { .g3, .g6 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .g3, .g2 { grid-template-columns: 1fr; } .g6 { grid-template-columns: repeat(2, 1fr); } .hero h1 { font-size: 32px; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 10px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.icon { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: color-mix(in srgb, var(--brand) 12%, transparent); color: var(--brand); }
.icon svg { width: 22px; height: 22px; }
.device { text-align: center; padding: 20px 12px; }
.device .icon { margin: 0 auto; }
.device h3 { font-size: 16px; }
.device p { font-size: 13px; }

/* flow */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: step; }
@media (max-width: 860px) { .flow { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .flow { grid-template-columns: 1fr; } }
.flow .card { position: relative; padding-top: 44px; }
.flow .card::before { counter-increment: step; content: counter(step); position: absolute; top: 16px; left: 22px; width: 24px; height: 24px; border-radius: 50%; background: var(--brand); color: #fff; font-size: 13px; font-weight: 700; display: grid; place-items: center; }

/* transcript mock */
.mock { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 18px; box-shadow: 0 18px 50px -24px rgba(40, 30, 120, .35); }
.mock .bar { display: flex; gap: 6px; margin-bottom: 14px; }
.mock .bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.line { display: grid; grid-template-columns: 54px auto 1fr; gap: 10px; align-items: baseline; padding: 7px 0; border-bottom: 1px dashed var(--line); font-size: 15px; }
.line:last-child { border-bottom: 0; }
.line time { color: var(--muted); font-variant-numeric: tabular-nums; font-size: 13px; }
.who { font-size: 12px; font-weight: 700; color: #fff; padding: 1px 8px; border-radius: 6px; white-space: nowrap; }
.w1 { background: #5b4bf5; } .w2 { background: #e0457b; } .w3 { background: #1f9d55; }
mark.hot { background: color-mix(in srgb, var(--brand2) 25%, transparent); color: inherit; border-radius: 4px; padding: 0 3px; }
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
ul.ticks { list-style: none; padding: 0; margin: 0; }
ul.ticks li { padding: 8px 0 8px 30px; position: relative; color: var(--muted); }
ul.ticks li b { color: var(--fg); }
ul.ticks li::before { content: ""; position: absolute; left: 0; top: 14px; width: 18px; height: 18px; border-radius: 50%; background: color-mix(in srgb, var(--ok) 18%, transparent); box-shadow: inset 0 0 0 5px color-mix(in srgb, var(--ok) 70%, transparent); }

/* privacy tiers */
.tier h3 { display: flex; align-items: center; gap: 8px; }
.tag { font-size: 12px; font-weight: 600; border-radius: 999px; padding: 2px 10px; background: var(--bg2); color: var(--muted); border: 1px solid var(--line); }
.tag.green { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.tag.amber { color: #b7791f; border-color: #e7c27d; }
.tier ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }

/* pricing */
.price { text-align: center; max-width: 520px; margin: 0 auto; padding: 34px; }
.price .now { font-size: 54px; font-weight: 800; letter-spacing: -0.02em; }
.price .was { color: var(--muted); text-decoration: line-through; margin-left: 8px; font-size: 20px; }
.price ul { text-align: left; margin: 20px auto 24px; max-width: 360px; }

/* faq */
details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; margin-bottom: 10px; }
summary { cursor: pointer; padding: 14px 0; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--muted); font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { margin: 0 0 16px; color: var(--muted); }

/* legal pages */
.doc { max-width: 820px; padding: 56px 24px 80px; margin: 0 auto; }
.doc h1 { font-size: clamp(28px, 4vw, 40px); margin: 0 0 6px; }
.doc .meta { color: var(--muted); margin: 0 0 32px; font-size: 14px; }
.doc h2 { font-size: 21px; margin: 36px 0 10px; }
.doc p, .doc li { color: var(--fg); }
.doc .note { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; color: var(--muted); }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg2); }

/* footer */
footer.site { border-top: 1px solid var(--line); padding: 40px 0; color: var(--muted); font-size: 14px; }
.foot { display: flex; flex-wrap: wrap; gap: 18px 32px; align-items: center; justify-content: space-between; }
.foot nav { display: flex; gap: 18px; flex-wrap: wrap; }
.foot nav a { color: var(--muted); }
.center { text-align: center; }
.big404 { font-size: 88px; font-weight: 800; margin: 0; color: var(--brand); }