:root {
  color-scheme: light;
  --ink: #1c1c1e;
  --muted: #6b6b70;
  --line: #e6e6ea;
  --soft: #f5f6f8;
  --accent: #2b5fd9;
  --accent-ink: #1f47a8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); }
a:hover { color: var(--accent-ink); }

/* header */
.site-header { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 10; }
.site-header .wrap { display: flex; align-items: center; gap: 20px; min-height: 64px; flex-wrap: wrap; }
.logo { font-weight: 700; letter-spacing: .02em; color: var(--ink); text-decoration: none; font-size: 18px; }
.site-header nav { display: flex; gap: 18px; flex-wrap: wrap; margin-left: auto; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 15px; padding: 6px 0; }
.site-header nav a:hover, .site-header nav a.active { color: var(--ink); }
.lang { font-size: 13px; color: var(--muted); text-decoration: none; border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; }
.lang:hover { color: var(--ink); border-color: var(--muted); }

/* content */
main { padding: 24px 20px 56px; }
h1 { font-size: 34px; line-height: 1.2; margin: 40px 0 12px; letter-spacing: -.01em; }
h2 { font-size: 24px; margin: 44px 0 10px; }
h3 { font-size: 17px; margin: 0 0 6px; }
p { margin: 0 0 14px; }
.lead { color: var(--muted); font-size: 18px; max-width: 640px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.btn {
  display: inline-block; margin-top: 8px; padding: 11px 20px; border-radius: 8px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600;
}
.btn:hover { background: var(--accent-ink); color: #fff; }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); margin-left: 8px; }
.btn.ghost:hover { background: var(--soft); }
.hero { padding: 24px 0 8px; }
.hero .actions { margin: 18px 0 8px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 20px 0; }
.card { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: #fff; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.card ul li { margin: 4px 0; }

.steps { counter-reset: step; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 20px 0; }
.steps div { padding: 16px; border-radius: 12px; background: var(--soft); }
.steps div::before { counter-increment: step; content: counter(step); display: inline-block; width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: #fff; text-align: center; line-height: 26px; font-weight: 600; margin-bottom: 8px; }
.steps h3 { font-size: 16px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; }

.service { border-top: 1px solid var(--line); padding: 26px 0; }
.service:last-child { border-bottom: 1px solid var(--line); }
.service h2 { margin: 0 0 8px; font-size: 21px; }
.service ul { margin: 10px 0 0; padding-left: 20px; color: var(--muted); }

.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 24px 0; align-items: start; }
.plan { border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.plan.featured { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(43, 95, 217, .1); }
.plan .price { font-size: 32px; font-weight: 700; margin: 6px 0 2px; }
.plan .per { color: var(--muted); font-size: 14px; margin-bottom: 12px; }
.plan ul { padding-left: 18px; margin: 0; color: var(--muted); font-size: 15px; }
.plan ul li { margin: 5px 0; }

table { border-collapse: collapse; width: 100%; margin: 16px 0 24px; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
td.c { text-align: center; }

.post-list article { border-top: 1px solid var(--line); padding: 20px 0; }
.post-list article:last-child { border-bottom: 1px solid var(--line); }
.post-list h2 { margin: 0 0 6px; font-size: 20px; }
.post-list h2 a { text-decoration: none; color: var(--ink); }
.post-list h2 a:hover { color: var(--accent); }
.post-meta { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
article.post { max-width: 720px; }
article.post h1 { margin-top: 24px; }
article.post h2 { font-size: 21px; margin-top: 30px; }
article.post pre { background: #0f1115; color: #e6e6ea; padding: 14px 16px; border-radius: 10px; overflow: auto; font-size: 13.5px; line-height: 1.5; }
article.post code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .95em; }
article.post p code, article.post li code { background: var(--soft); padding: 1px 5px; border-radius: 4px; }
article.post ul, article.post ol { padding-left: 22px; }

.note { background: var(--soft); border-left: 3px solid var(--accent); padding: 12px 16px; border-radius: 6px; margin: 16px 0; }
.contact-list { list-style: none; padding: 0; margin: 12px 0 24px; font-size: 17px; }
.contact-list li { margin: 8px 0; }
.stack { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 20px; }
.stack span { border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; font-size: 14px; color: var(--muted); }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 26px 0 44px; color: var(--muted); font-size: 13px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.foot-links a { color: var(--muted); text-decoration: none; margin-left: 16px; }
.foot-links a:hover { color: var(--ink); }

@media (max-width: 640px) {
  h1 { font-size: 28px; }
  .site-header nav { margin-left: 0; gap: 14px; }
  .site-header .wrap { padding-bottom: 10px; }
  .btn.ghost { margin-left: 0; margin-top: 10px; }
}