:root {
  --bg: #f7f7f8;
  --surface: #ffffff;
  --surface-2: #f0f1f3;
  --text: #15171a;
  --muted: #62676f;
  --line: #d9dce1;
  --accent: #17191c;
  --accent-soft: #eceef1;
  --success: #176b3a;
  --warning: #8a5400;
  --radius: 20px;
  --shadow: 0 18px 55px rgba(22, 25, 30, .09);
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img, svg { max-width: 100%; }
button, input { font: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(217, 220, 225, .85);
}
.header-inner {
  width: min(calc(100% - 32px), var(--max));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-weight: 850;
  letter-spacing: .01em;
  white-space: nowrap;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border: 2px solid var(--text);
  border-radius: 9px;
  position: relative;
  background: var(--surface);
}
.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  background: var(--text);
}
.brand-mark::before { width: 2px; top: 3px; bottom: 3px; left: 15px; }
.brand-mark::after { height: 2px; left: 3px; right: 3px; top: 15px; }
.nav { display: flex; align-items: center; gap: 20px; }
.nav a { text-decoration: none; font-size: 14px; font-weight: 700; color: #40444b; }
.nav a:hover { color: #000; }
.nav .nav-cta {
  background: var(--accent);
  color: #fff;
  padding: 9px 15px;
  border-radius: 999px;
}
.menu-button { display: none; border: 0; background: transparent; font-size: 24px; padding: 8px; }
main { min-height: 65vh; }
.container { width: min(calc(100% - 32px), var(--max)); margin-inline: auto; }
.hero {
  padding: 86px 0 58px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 54px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}
h1, h2, h3 { line-height: 1.25; letter-spacing: -.025em; }
h1 { font-size: clamp(38px, 6vw, 68px); margin: 18px 0 22px; }
h2 { font-size: clamp(29px, 4vw, 43px); margin: 0 0 20px; }
h3 { font-size: 20px; margin: 0 0 10px; }
.lead { color: var(--muted); font-size: clamp(17px, 2vw, 20px); max-width: 640px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 11px 20px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 800;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: white;
}
.button.secondary { background: var(--surface); color: var(--text); border-color: var(--line); }
.button:hover { transform: translateY(-1px); }
.trust-line { margin-top: 22px; color: var(--muted); font-size: 13px; }
.mock-editor {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 14px;
  box-shadow: var(--shadow);
  transform: rotate(.6deg);
}
.mock-bar { height: 39px; background: #f1f2f4; border-radius: 13px; margin-bottom: 12px; display:flex; align-items:center; gap:7px; padding:0 12px; }
.mock-dot { width: 8px; height: 8px; border-radius:50%; background:#9da2aa; }
.mock-canvas { aspect-ratio: .71; background: #fff; border: 1px solid #cfd2d7; border-radius: 10px; padding: 7%; display:grid; grid-template-columns:1fr 1fr; grid-template-rows:.8fr 1.2fr .9fr; gap:11px; }
.mock-panel { border: 4px solid #202226; background: linear-gradient(135deg,#fff,#f0f1f3); }
.mock-panel.wide { grid-column:1/-1; }
.section { padding: 72px 0; }
.section.alt { background: #eff0f2; border-block: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head p { color: var(--muted); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: 0 8px 28px rgba(22,25,30,.04);
}
.card p { color: var(--muted); margin-bottom: 0; }
.icon-box { width: 42px; height: 42px; border-radius: 12px; background: var(--accent-soft); display:grid; place-items:center; margin-bottom:17px; font-size:21px; }
.steps { counter-reset: step; display: grid; gap: 14px; }
.step { counter-increment: step; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 21px 22px 21px 70px; position: relative; }
.step::before { content: counter(step); position: absolute; left: 20px; top: 20px; width: 33px; height: 33px; border-radius: 10px; background: var(--text); color:#fff; display:grid; place-items:center; font-weight:850; }
.step strong { display:block; font-size:18px; margin-bottom:3px; }
.step span { color:var(--muted); }
.safety { display:grid; grid-template-columns:.8fr 1.2fr; gap:28px; align-items:center; }
.safety-badge { min-height:280px; border-radius:26px; background:#17191c; color:#fff; display:grid; place-items:center; text-align:center; padding:32px; }
.safety-badge .lock { font-size:70px; line-height:1; }
.check-list { list-style:none; padding:0; margin:0; display:grid; gap:12px; }
.check-list li { position:relative; padding-left:30px; }
.check-list li::before { content:"✓"; position:absolute; left:0; top:0; font-weight:900; color:var(--success); }
.ad-shell { margin: 32px auto; min-height: 0; }
.ad-slot { display:none; overflow:hidden; text-align:center; }
.ad-slot[data-active="true"] { display:block; min-height:90px; }
.page-hero { padding: 64px 0 34px; max-width: 820px; }
.page-hero h1 { font-size: clamp(38px, 5vw, 58px); }
.article-layout { display:grid; grid-template-columns:minmax(0,1fr) 260px; gap:44px; align-items:start; padding-bottom:76px; }
.article { background:var(--surface); border:1px solid var(--line); border-radius:22px; padding:clamp(24px,5vw,50px); }
.article h2 { font-size:30px; margin-top:48px; }
.article h2:first-child { margin-top:0; }
.article h3 { margin-top:30px; }
.article p, .article li { color:#3f444c; }
.article code { background:#eceef1; padding:2px 6px; border-radius:6px; }
.toc { position:sticky; top:92px; background:var(--surface); border:1px solid var(--line); border-radius:18px; padding:20px; }
.toc strong { display:block; margin-bottom:10px; }
.toc a { display:block; text-decoration:none; color:var(--muted); font-size:14px; padding:5px 0; }
.toc a:hover { color:var(--text); }
.template-demo { display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin:22px 0 36px; }
.template-paper { aspect-ratio:.71; background:#fff; border:1px solid var(--line); padding:7px; display:grid; gap:5px; box-shadow:0 8px 18px rgba(0,0,0,.05); }
.template-paper.one { grid-template-rows:1fr; }
.template-paper.two { grid-template-rows:1fr 1fr; }
.template-paper.three { grid-template-rows:1.15fr .7fr 1.15fr; }
.template-paper.four { grid-template-columns:1fr 1fr; grid-template-rows:1fr 1fr; }
.template-paper span { border:3px solid #1f2226; background:#f5f6f7; }
.faq-list { display:grid; gap:12px; }
details { background:var(--surface); border:1px solid var(--line); border-radius:15px; padding:18px 20px; }
summary { cursor:pointer; font-weight:800; }
details p { color:var(--muted); margin-bottom:0; }
.notice { border-left:4px solid var(--warning); background:#fff7e8; padding:16px 18px; border-radius:0 12px 12px 0; color:#63400c; }
.cta-box { background:#17191c; color:#fff; border-radius:28px; padding:clamp(28px,5vw,55px); display:flex; align-items:center; justify-content:space-between; gap:30px; }
.cta-box p { color:#c9cdd3; margin-bottom:0; }
.cta-box .button { background:#fff; color:#17191c; border-color:#fff; white-space:nowrap; }
.site-footer { border-top:1px solid var(--line); background:#fff; padding:42px 0; }
.footer-grid { display:grid; grid-template-columns:1fr auto; gap:30px; align-items:start; }
.footer-links { display:flex; flex-wrap:wrap; gap:16px 22px; }
.footer-links a { color:var(--muted); text-decoration:none; font-size:14px; }
.footer-note { color:var(--muted); font-size:13px; margin-top:12px; }
.config-warning { display:none; background:#fff4cc; border:1px solid #e7c860; padding:10px 14px; font-size:13px; text-align:center; }
.config-warning.show { display:block; }
@media (max-width: 900px) {
  .hero, .safety { grid-template-columns:1fr; }
  .hero { padding-top:52px; }
  .mock-editor { max-width:560px; margin:0 auto; width:100%; }
  .grid-3 { grid-template-columns:1fr 1fr; }
  .article-layout { grid-template-columns:1fr; }
  .toc { position:static; order:-1; }
  .template-demo { grid-template-columns:repeat(2,1fr); max-width:520px; }
}
@media (max-width: 720px) {
  .header-inner { min-height:60px; }
  .menu-button { display:block; }
  .nav { display:none; position:absolute; top:60px; left:0; right:0; background:var(--surface); border-bottom:1px solid var(--line); padding:14px 18px 20px; flex-direction:column; align-items:stretch; }
  .nav.open { display:flex; }
  .nav a { padding:8px; }
  .nav .nav-cta { text-align:center; }
  .grid-3, .grid-2 { grid-template-columns:1fr; }
  .section { padding:52px 0; }
  .cta-box { align-items:stretch; flex-direction:column; }
  .footer-grid { grid-template-columns:1fr; }
  h1 { font-size:40px; }
}

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