:root {
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --ink: #111827;
  --ink-2: #4b5563;
  --ink-3: #6b7280;
  --line: #e5e7eb;
  --brand: #111827;
  --accent-1: #25f4ee;
  --accent-2: #fe2c55;
  --grad: linear-gradient(90deg, #25f4ee, #fe2c55);
  --radius: 14px;
  --shadow: 0 10px 30px rgba(17, 24, 39, .08);
  --maxw: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

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

/* ---------- header ---------- */
.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 28px; height: 64px; }

.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; }
.logo .mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--grad);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 15px; font-weight: 900;
}

.nav { display: flex; gap: 22px; margin-left: 8px; }
.nav a { color: var(--ink-2); font-weight: 600; font-size: 15px; padding: 6px 2px; }
.nav a:hover, .nav a.on { color: var(--ink); }

.top .sp { flex: 1; }

.lang { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang button {
  border: 0; background: #fff; padding: 5px 10px; font-size: 13px; font-weight: 700;
  color: var(--ink-3); cursor: pointer;
}
.lang button.active { background: var(--ink); color: #fff; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 10px; padding: 10px 20px; font-weight: 700; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: .15s;
}
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #000; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--ink-3); }
.btn-grad { background: var(--grad); color: #fff; }
.btn-grad:hover { filter: brightness(1.05); }
.btn-sm { padding: 8px 14px; font-size: 14px; }

/* ---------- hero ---------- */
.hero { padding: 84px 0 72px; background:
  radial-gradient(600px 300px at 15% 0%, rgba(37, 244, 238, .12), transparent 60%),
  radial-gradient(600px 300px at 85% 0%, rgba(254, 44, 85, .10), transparent 60%);
}
.hero h1 {
  font-size: clamp(34px, 5vw, 56px); line-height: 1.15; letter-spacing: -.02em;
  font-weight: 900; max-width: 820px;
}
.hero h1 .grad {
  display: inline-block;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.sub { margin-top: 18px; font-size: 18px; color: var(--ink-2); max-width: 640px; }
.hero .cta { margin-top: 30px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .note { margin-top: 14px; font-size: 13px; color: var(--ink-3); }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 6px 14px; font-size: 13px; font-weight: 700; color: var(--ink-2);
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--grad); }

/* ---------- sections ---------- */
section.block { padding: 64px 0; }
section.block.soft { background: var(--bg-soft); }
.eyebrow {
  color: var(--accent-2); font-weight: 800; font-size: 13px; letter-spacing: .12em;
  text-transform: uppercase; margin-bottom: 10px;
}
h2.title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 850; letter-spacing: -.01em; }
p.lead { margin-top: 12px; color: var(--ink-2); max-width: 680px; }

.grid { margin-top: 40px; display: grid; gap: 18px; }
.grid.g3 { grid-template-columns: repeat(3, 1fr); }
.grid.g2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid.g3 { grid-template-columns: 1fr; } }
@media (max-width: 720px) { .grid.g2 { grid-template-columns: 1fr; } }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: 0 2px 6px rgba(17, 24, 39, .04);
}
.card h3 { font-size: 17px; font-weight: 800; margin-bottom: 8px; }
.card p { color: var(--ink-2); font-size: 15px; }
.card .ico {
  width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center;
  justify-content: center; font-size: 20px; margin-bottom: 14px;
  background: rgba(37, 244, 238, .12);
}

/* steps */
.steps { counter-reset: step; margin-top: 40px; display: grid; gap: 18px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px 22px; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: -14px; left: 22px; width: 30px; height: 30px;
  border-radius: 50%; background: var(--grad); color: #fff; font-weight: 900;
  display: flex; align-items: center; justify-content: center; font-size: 14px;
}
.step h3 { font-size: 17px; font-weight: 800; margin: 8px 0 6px; }
.step p { color: var(--ink-2); font-size: 15px; }

/* pricing */
.plans { margin-top: 40px; display: grid; gap: 18px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .plans { grid-template-columns: 1fr; } }
.plan { border: 1px solid var(--line); border-radius: 16px; padding: 28px; background: #fff; display: flex; flex-direction: column; }
.plan.hot { border: 2px solid #111827; box-shadow: var(--shadow); position: relative; }
.plan .tag {
  position: absolute; top: -12px; left: 24px; background: var(--ink); color: #fff;
  font-size: 12px; font-weight: 800; padding: 4px 12px; border-radius: 999px;
}
.plan h3 { font-size: 18px; font-weight: 800; }
.plan .price { font-size: 40px; font-weight: 900; margin: 10px 0 2px; letter-spacing: -.02em; }
.plan .price small { font-size: 15px; color: var(--ink-3); font-weight: 600; }
.plan ul { list-style: none; margin: 18px 0 22px; display: grid; gap: 10px; }
.plan li { display: flex; gap: 10px; font-size: 15px; color: var(--ink-2); }
.plan li b { color: var(--ink); }
.plan li::before { content: "✓"; color: #0ea5a0; font-weight: 900; }
.plan .btn { margin-top: auto; }

/* faq */
.faq { margin-top: 34px; display: grid; gap: 12px; max-width: 860px; }
details { border: 1px solid var(--line); border-radius: 12px; background: #fff; padding: 16px 20px; }
details summary { cursor: pointer; font-weight: 800; font-size: 16px; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; font-size: 20px; color: var(--ink-3); }
details[open] summary::after { content: "–"; }
details .a { margin-top: 10px; color: var(--ink-2); font-size: 15px; }

/* legal pages */
.legal { padding: 56px 0 80px; }
.legal h1 { font-size: 34px; font-weight: 900; margin-bottom: 6px; }
.legal .upd { color: var(--ink-3); font-size: 14px; margin-bottom: 28px; }
.legal h2 { font-size: 20px; font-weight: 850; margin: 30px 0 10px; }
.legal p, .legal li { color: var(--ink-2); font-size: 15.5px; }
.legal ul { padding-left: 22px; margin: 8px 0; }
.legal .box { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 14px 0; }

/* help */
.help-grid { margin-top: 34px; display: grid; gap: 18px; grid-template-columns: repeat(2, 1fr); }
@media (max-width: 800px) { .help-grid { grid-template-columns: 1fr; } }

/* cta band */
.band { background: var(--ink); color: #fff; border-radius: 20px; padding: 44px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.band h2 { font-size: 26px; font-weight: 900; }
.band p { color: #d1d5db; margin-top: 6px; }

/* footer */
footer { border-top: 1px solid var(--line); padding: 34px 0 44px; margin-top: 40px; }
footer .cols { display: flex; gap: 40px; flex-wrap: wrap; justify-content: space-between; }
footer .fbrand { max-width: 320px; }
footer .fbrand p { color: var(--ink-3); font-size: 14px; margin-top: 8px; }
footer h4 { font-size: 14px; font-weight: 800; margin-bottom: 10px; }
footer ul { list-style: none; display: grid; gap: 8px; }
footer ul a { color: var(--ink-2); font-size: 14px; }
footer ul a:hover { color: var(--ink); }
footer .base { margin-top: 28px; color: var(--ink-3); font-size: 13px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }