:root {
  --bg: #161618;
  --panel: #1a1a1c;
  --card: rgba(255, 255, 255, 0.03);
  --ring: rgba(255, 255, 255, 0.07);
  --line: rgba(255, 255, 255, 0.06);
  --text: #f5f5f7;
  --text-2: rgba(255, 255, 255, 0.62);
  --text-3: rgba(255, 255, 255, 0.38);
  --hover: rgba(255, 255, 255, 0.05);
  --hover-3: rgba(255, 255, 255, 0.14);
  --green: #28c840;
  --amber-text: rgba(254, 210, 120, 0.92);
  --amber-bg: rgba(254, 188, 46, 0.09);
  --amber-line: rgba(254, 188, 46, 0.28);
  --btn-bg: #fff;
  --btn-fg: #111;
  --radius: 14px;
  --radius-sm: 9px;
}

html[data-theme="light"] {
  --bg: #eceef2;
  --panel: #f5f6f8;
  --card: #ffffff;
  --ring: rgba(15, 23, 42, 0.09);
  --line: rgba(15, 23, 42, 0.07);
  --text: #171b22;
  --text-2: rgba(23, 27, 34, 0.66);
  --text-3: rgba(23, 27, 34, 0.44);
  --hover: rgba(15, 23, 42, 0.05);
  --hover-3: rgba(15, 23, 42, 0.13);
  --green: #16a34a;
  --amber-text: #b45309;
  --amber-bg: rgba(217, 119, 6, 0.09);
  --amber-line: rgba(217, 119, 6, 0.3);
  --btn-bg: #171b22;
  --btn-fg: #fff;
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; display: flex; flex-direction: column; }

a { color: inherit; }
button { font-family: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

[data-lang] { display: none; }
[data-lang].on { display: block; }

.info-top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.info-top-in {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.info-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.info-brand img { width: 26px; height: 26px; border-radius: 7px; }
.info-brand:hover { opacity: 0.8; }

.info-top-sp { flex: 1; }

.info-langs {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--ring);
}
.info-lang-btn {
  padding: 4px 10px;
  border-radius: 7px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-3);
  transition: background 0.15s, color 0.15s;
}
.info-lang-btn:hover { color: var(--text); }
.info-lang-btn.active { background: var(--hover-3); color: var(--text); }

.info-main {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.info-main h1 {
  font-size: 1.7rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 6px;
}

.info-date {
  color: var(--text-3);
  font-size: 0.82rem;
  margin-bottom: 30px;
}

.info-main h2 {
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 34px 0 10px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.info-main h2:first-of-type { margin-top: 22px; border-top: 0; padding-top: 0; }

.info-main p { color: var(--text-2); margin-bottom: 12px; }
.info-main li { color: var(--text-2); margin: 6px 0 6px 20px; }
.info-main strong { color: var(--text); font-weight: 600; }
.info-main code {
  font-family: ui-monospace, "JetBrains Mono", monospace;
  font-size: 0.82em;
  background: var(--hover);
  border: 1px solid var(--ring);
  border-radius: 5px;
  padding: 1px 6px;
  color: var(--text);
  white-space: nowrap;
}
.info-main a { color: var(--text); text-decoration-color: var(--text-3); text-underline-offset: 3px; }
.info-main a:hover { text-decoration-color: var(--text); }

.info-note {
  display: block;
  background: var(--amber-bg);
  border: 1px solid var(--amber-line);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--amber-text);
  font-size: 0.88rem;
  margin: 16px 0;
}

.faq-item { border-top: 1px solid var(--line); }
.faq-item:last-of-type { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 2px;
  font-weight: 550;
  font-size: 0.95rem;
  transition: color 0.15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  margin-left: auto;
  flex: none;
  width: 8px;
  height: 8px;
  border-right: 1.6px solid var(--text-3);
  border-bottom: 1.6px solid var(--text-3);
  transform: rotate(45deg);
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: rotate(-135deg); }
.faq-item summary:hover { color: var(--text-2); }
.faq-body { padding: 0 2px 16px; color: var(--text-2); font-size: 0.92rem; }
.faq-body p { margin-bottom: 8px; }
.faq-body p:last-child { margin-bottom: 0; }

.info-main a.tg-cta { color: var(--btn-fg); text-decoration: none; }

.tg-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 12px;
  text-decoration: none;
  transition: opacity 0.15s, transform 0.15s;
  margin: 6px 0 4px;
}
.tg-cta:hover { opacity: 0.88; transform: translateY(-1px); }
.tg-cta svg { width: 18px; height: 18px; }

.contact-cards { display: grid; gap: 14px; margin-top: 26px; }
@media (min-width: 620px) { .contact-cards { grid-template-columns: 1fr 1fr; } }

.contact-card {
  background: var(--card);
  border: 1px solid var(--ring);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
.contact-card h2 { margin: 0; padding: 0; border: 0; font-size: 1rem; }
.contact-card p { font-size: 0.88rem; flex: 1; }
.contact-ico {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--hover);
  border: 1px solid var(--ring);
  display: grid;
  place-items: center;
  color: var(--text-2);
  margin-bottom: 4px;
}

.info-foot {
  border-top: 1px solid var(--line);
  padding: 18px 20px 26px;
}
.info-foot-in {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  color: var(--text-3);
  font-size: 0.8rem;
}
.info-foot a { color: var(--text-3); text-decoration: none; }
.info-foot a:hover { color: var(--text); }
.info-foot-sp { flex: 1; }

@media (max-width: 560px) {
  .info-main { padding: 28px 16px 48px; }
  .info-main h1 { font-size: 1.45rem; }
  .info-top-in { padding: 10px 14px; gap: 10px; }
  .info-brand span { display: none; }
}