:root{
  --ink:#111827;--slate:#4b5563;--muted:#6b7280;--line:#e5e7eb;--bg:#ffffff;--soft:#fdf2f8;--soft-2:#f9fafb;
  --brand:#be185d;--brand-2:#db2777;--brand-ink:#831843;--amber:#f59e0b;--violet:#7c3aed;
  --font:system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.0625rem/1.75 var(--font)}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand)}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em;margin:0 0 .55em;color:var(--ink)}
h1{font-size:clamp(2rem,4.2vw,3rem);font-weight:800}
h2{font-size:clamp(1.4rem,2.6vw,1.8rem);font-weight:800}
h3{font-size:1.08rem;font-weight:700}
p{margin:0 0 1.05em}
.wrap{width:min(1180px,100% - 32px);margin-inline:auto}

/* header */
.top{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:saturate(180%) blur(8px)}
.top-row{display:flex;align-items:center;gap:24px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;flex:none;color:var(--ink);text-decoration:none;font-weight:800;font-size:1.12rem;letter-spacing:-.02em}
.logo svg{flex:none}
.menu{display:flex;gap:2px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.menu::-webkit-scrollbar{display:none}
.menu a{flex:none;padding:8px 13px;border-radius:8px;color:var(--slate);text-decoration:none;font-weight:600;font-size:.95rem}
.menu a:hover,.menu a.is-here{color:var(--brand);background:var(--soft)}

/* hero */
.hero{padding:22px 0 46px;background:radial-gradient(1100px 420px at 85% 0,#fce7f3 0,transparent 60%),linear-gradient(180deg,#fff 0,#fff 100%)}
.crumbs{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0 0 20px;padding:0;font-size:.88rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:6px;color:#d1d5db}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--brand)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,620px);gap:48px;align-items:center}
.hero-text>p{color:var(--slate);font-size:1.1rem}
.byline{font-size:.92rem!important;color:var(--muted)!important;margin:0}
.byline a{font-weight:700;text-decoration:none}

/* demo */
.demo{position:relative;aspect-ratio:16/9;border-radius:18px;overflow:hidden;background:#1f0a17;box-shadow:0 24px 50px -18px rgba(131,24,67,.45),0 0 0 1px rgba(17,24,39,.06)}
.demo-cover{position:absolute;inset:0;cursor:pointer}
.demo-cover img{width:100%;height:100%;object-fit:cover}
.demo-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(17,24,39,.45),transparent 45%)}
.demo-cover:focus-visible{outline:4px solid var(--amber);outline-offset:-4px}
.demo-play{position:absolute;z-index:1;left:50%;top:50%;width:78px;height:78px;margin:-39px 0 0 -39px;display:grid;place-items:center;padding-left:4px;border-radius:50%;background:#fff;color:var(--brand);box-shadow:0 0 0 12px rgba(255,255,255,.28),0 12px 30px rgba(0,0,0,.35);transition:transform .2s}
.demo-cover:hover .demo-play{transform:scale(1.07)}
.demo-label{position:absolute;z-index:1;left:16px;bottom:14px;color:#fff;font-weight:700;font-size:.95rem;letter-spacing:.01em}
.demo iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* content */
.content{max-width:820px;padding:16px 0 70px}
.sec{display:flow-root;padding:38px 0 6px;border-top:1px solid var(--line)}
.sec:first-child{border-top:0}
.pic{width:280px;margin:4px 0 18px}
.pic img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:16px;box-shadow:0 14px 30px -12px rgba(17,24,39,.3)}
.pic-right{float:right;margin-left:28px}
.pic-left{float:left;margin-right:28px}

.table-wrap{clear:both;margin:8px 0 22px;overflow-x:auto;border:1px solid var(--line);border-radius:14px}
table{width:100%;border-collapse:collapse;font-size:.97rem;font-variant-numeric:tabular-nums}
th,td{padding:11px 16px;text-align:left;border-bottom:1px solid var(--line)}
tr:last-child>*{border-bottom:0}
.facts th{width:40%;font-weight:600;color:var(--slate);background:var(--soft-2)}
.facts td{font-weight:700}
.pay thead th,.versions thead th{background:var(--ink);color:#fff;font-weight:700;font-size:.92rem}
.pay td{text-align:center;font-weight:700}
.pay thead th:not(:first-child){text-align:center}
.pay tbody th{white-space:nowrap;font-weight:700}
.pay tbody th i{display:inline-block;width:10px;height:10px;margin-right:9px;border-radius:3px;background:var(--c)}
.pay tbody tr:nth-last-child(-n+4){background:#fff7fb}
.versions tbody th{font-weight:700;white-space:nowrap}
.versions td:nth-child(2){color:var(--slate);white-space:nowrap}

.note{clear:both;margin:6px 0 22px;padding:18px 22px 6px;border-radius:14px;background:var(--soft);border:1px solid #fbcfe8}
.note-title{font-weight:800;color:var(--brand-ink);margin-bottom:.5em}
.note ol{margin:0 0 12px;padding-left:20px}
.note li{margin-bottom:4px}
.ticks,.steps{margin:0 0 20px;padding:0;list-style:none}
.ticks li{position:relative;padding-left:30px;margin-bottom:9px}
.ticks li::before{content:"";position:absolute;left:0;top:7px;width:18px;height:18px;border-radius:50%;background:var(--brand)}
.ticks li::after{content:"";position:absolute;left:6px;top:10px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.steps{counter-reset:s}
.steps li{position:relative;padding:0 0 10px 42px;counter-increment:s}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:var(--ink);color:#fff;font-weight:700;font-size:.88rem}

.qa-list{display:grid;gap:12px}
.qa{padding:18px 22px 6px;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;background:var(--soft-2)}
.qa p{color:var(--slate)}

.author{display:flex;gap:20px;align-items:flex-start;margin-top:40px;padding:24px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(135deg,#fff 0,#fdf2f8 100%)}
.author-avatar{flex:none;width:72px;height:72px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand-2),var(--violet));color:#fff;font-weight:800;font-size:1.35rem}
.author-name{font-weight:800;font-size:1.15rem;margin:0}
.author-role{font-weight:600;color:var(--brand);margin:0 0 10px;font-size:.92rem}
.author-date{font-size:.86rem;color:var(--muted);margin:0}

/* footer */
.foot{background:#0b0f19;color:#9ca3af;padding:42px 0 30px;font-size:.95rem}
.foot-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:32px;margin-bottom:24px}
.foot-logo{color:#fff;font-weight:800;font-size:1.2rem}
.foot-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 24px;align-content:start}
.foot-links a{color:#e5e7eb;text-decoration:none}
.foot-links a:hover{color:#fff;text-decoration:underline}
.badges{display:flex;flex-wrap:wrap;gap:10px;padding:18px 0;border-top:1px solid #1f2937;border-bottom:1px solid #1f2937}
.badge{display:inline-flex;align-items:center;height:34px;padding:0 13px;border:1px solid #374151;border-radius:8px;color:#e5e7eb;text-decoration:none;font-weight:700;font-size:.85rem}
.badge-age{border-color:var(--brand-2);color:#f9a8d4;font-size:.95rem}
.foot-small{margin:16px 0 0;font-size:.85rem;color:#6b7280}

@media (max-width:960px){
  .hero-grid{display:flex;flex-direction:column;gap:22px}
  .demo{order:-1;width:100%}
}
@media (max-width:760px){
  .top-row{flex-wrap:wrap;gap:0;min-height:0;padding-top:10px}
  .logo{padding-bottom:6px}
  .menu{width:100%;margin:0 -6px;padding-bottom:6px}
  .menu a{padding:7px 11px;font-size:.92rem}
  html{scroll-padding-top:110px}
}
@media (max-width:700px){
  body{font-size:1.02rem}
  .hero{padding:16px 0 32px}
  .demo{aspect-ratio:4/3;border-radius:14px}
  .demo.is-playing{aspect-ratio:3/4}
  .pic,.pic-right,.pic-left{float:none;width:min(320px,100%);margin:6px auto 20px}
  th,td{padding:10px 10px}
  .pay,.versions{font-size:.9rem}
  .versions tbody th,.versions td:nth-child(2){white-space:normal}
  .foot-grid,.foot-links{grid-template-columns:minmax(0,1fr)}
  .author{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .demo-play{transition:none}
}

.foot-mail{font-size:.92rem;margin:10px 0 0;opacity:.9}.foot-mail a,.author-mail a{color:inherit;text-decoration:underline;text-underline-offset:2px;overflow-wrap:anywhere}
.sec ul,.sec ol{padding-left:22px}