:root{
  --bg:#f4f6f9; --card:#fff; --ink:#1b2430; --muted:#5d6b7a; --line:#e2e7ee;
  --brand:#ff6900; --brand-dark:#d95700; --navy:#14202e; --ok:#1f8a4c; --warn-bg:#fff4e5; --warn:#8a4b00;
  --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--brand-dark)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}

header.top{background:var(--navy);color:#fff}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;font-size:1.1rem}
.logo .dot{width:30px;height:30px;border-radius:50%;background:var(--brand);display:grid;place-items:center;font-size:.95rem}
header.top nav a{color:#cfd8e3;text-decoration:none;margin-left:18px;font-size:.95rem}
header.top nav a:hover{color:#fff}

.hero{background:linear-gradient(180deg,var(--navy) 0%,#1d2d40 100%);color:#fff;padding:36px 0 84px}
.hero h1{margin:0 0 8px;font-size:clamp(1.6rem,3.6vw,2.4rem);line-height:1.2}
.hero p{margin:0;color:#c9d3df;max-width:640px}

.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:-60px}
.tile{background:var(--card);border-radius:var(--radius);padding:22px;box-shadow:0 6px 24px rgba(20,32,46,.10);display:flex;flex-direction:column;text-decoration:none;color:inherit;border:1px solid var(--line);transition:transform .15s,box-shadow .15s}
.tile:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(20,32,46,.16)}
.tile .ico{width:46px;height:46px;border-radius:12px;background:#fff1e6;display:grid;place-items:center;font-size:1.5rem;margin-bottom:12px}
.tile h2{margin:0 0 6px;font-size:1.15rem}
.tile p{margin:0 0 16px;color:var(--muted);font-size:.95rem;flex:1}
.tile .tag{font-size:.75rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}
.btn{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;font-weight:600;padding:10px 16px;border-radius:10px;text-align:center;border:0;cursor:pointer;font-size:.95rem}
.btn:hover{background:var(--brand-dark)}
.btn.ghost{background:transparent;color:var(--brand-dark);border:1.5px solid var(--brand)}
.btn.ghost:hover{background:#fff1e6}

section{padding:40px 0 8px}
section h2.sec{font-size:1.4rem;margin:0 0 6px}
section p.lead{color:var(--muted);margin:0 0 18px}

.notice{background:var(--warn-bg);color:var(--warn);border-radius:10px;padding:12px 16px;margin:28px 0 0;font-size:.95rem;border:1px solid #ffd9a8}

.search{width:100%;max-width:420px;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:1rem;margin-bottom:18px;background:#fff}
.brands{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.brand{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.brand h3{margin:0 0 8px;font-size:1.02rem}
.brand ul{list-style:none;margin:0;padding:0}
.brand li{display:flex;justify-content:space-between;gap:10px;padding:6px 0;border-top:1px solid var(--line);font-size:.93rem}
.brand li:first-child{border-top:0}
.brand code{color:var(--muted);font-size:.8rem;white-space:nowrap}
.empty{display:none;color:var(--muted)}

.dl{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.dl a{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;color:inherit;display:block}
.dl a:hover{border-color:var(--brand)}
.dl strong{display:block}
.dl span{color:var(--muted);font-size:.85rem}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
ol.steps{padding-left:0;list-style:none;counter-reset:s;margin:0}
ol.steps li{counter-increment:s;position:relative;padding:0 0 18px 48px}
ol.steps li::before{content:counter(s);position:absolute;left:0;top:-2px;width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:6px;font-size:.92rem}
.legend span{display:inline-flex;align-items:center;gap:6px}
.sw{width:14px;height:14px;border-radius:4px;display:inline-block;border:1px solid #0002}
video{width:100%;max-width:420px;border-radius:12px;background:#000;display:block}
.two{display:grid;grid-template-columns:1.3fr 1fr;gap:22px;align-items:start}
@media(max-width:800px){.two{grid-template-columns:1fr}header.top nav{display:none}}

footer{margin-top:48px;padding:26px 0;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
.banner{display:block;width:100%;height:auto;border-radius:var(--radius);margin:0 0 26px;box-shadow:0 8px 28px rgba(0,0,0,.35)}
@media(max-width:600px){.banner{border-radius:10px;margin-bottom:18px}}
ol.sub{margin:10px 0 8px;padding-left:20px}
ol.sub li{padding:0 0 6px;font-size:.95rem;counter-increment:none}
ol.sub li::before{content:none}
.hint{display:block;font-size:.88rem;color:var(--muted);background:var(--bg);border-radius:8px;padding:8px 12px}
.yt{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#000}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}