:root {
  --g: #06C755;
  --gd: #05a044;
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --bg: #f5f6f7;
  --card: #fff;
  --line: #e4e6e8;
  --win: #0078d4;
  --mac: #111;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: "Noto Sans JP", Meiryo, sans-serif; }
body { background: var(--bg); color: var(--ink); line-height: 1.65; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

header { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.hi { max-width: 1080px; margin: 0 auto; height: 66px; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 800; color: var(--g); font-size: 22px; display: flex; align-items: center; gap: 8px; }
.logo span { color: var(--muted); font-size: 13px; font-weight: 500; border-left: 1px solid var(--line); padding-left: 8px; }
nav { display: flex; gap: 16px; }
nav a { font-size: 14px; font-weight: 600; }
nav a:hover { color: var(--g); }

.hero { background: var(--card); padding: 44px 20px 20px; text-align: center; }
.hero h1 { font-size: 30px; margin: 8px 0 12px; }
.hero p { color: var(--muted); max-width: 640px; margin: 0 auto 8px; }

.os-pick { max-width: 720px; margin: 28px auto 40px; padding: 0 20px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.os { background: var(--card); border: 2px solid var(--line); border-radius: 16px; padding: 28px 20px; text-align: center; transition: .2s; }
.os:hover { border-color: var(--g); transform: translateY(-3px); box-shadow: 0 10px 24px rgba(0,0,0,.06); }
.ico { width: 64px; height: 64px; margin: 0 auto 14px; display: grid; place-items: center; }
.win-ico { width: 48px; height: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.win-ico i { background: var(--win); display: block; }
.win-ico i:nth-child(1) { border-radius: 2px 0 0 0; }
.win-ico i:nth-child(2) { border-radius: 0 2px 0 0; }
.win-ico i:nth-child(3) { border-radius: 0 0 0 2px; }
.win-ico i:nth-child(4) { border-radius: 0 0 2px 0; }
.mac-ico { width: 42px; height: 50px; background: var(--mac); border-radius: 12px 12px 16px 16px; position: relative; }
.mac-ico:before { content: ""; position: absolute; top: -10px; left: 50%; width: 16px; height: 12px; background: var(--mac); border-radius: 10px; transform: translateX(-50%); }
.os h3 { font-size: 20px; margin-bottom: 6px; }
.os p { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.btn { display: inline-block; background: var(--g); color: #fff; font-weight: 700; padding: 10px 18px; border-radius: 8px; font-size: 14px; }
.os.mac .btn { background: var(--mac); }

.hero-img { max-width: 880px; margin: 0 auto 40px; padding: 0 20px; }
.hero-img img { width: 100%; border-radius: 12px; border: 1px solid var(--line); }

.wrap { max-width: 1080px; margin: 48px auto; padding: 0 20px; }
.h2 { font-size: 22px; margin-bottom: 16px; text-align: center; }
.cats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.cat { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.cat:hover { border-color: var(--g); }
.cat h3 { font-size: 15px; margin-bottom: 6px; }
.cat p { font-size: 12px; color: var(--muted); }

.news { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 22px; }
.news h2 { font-size: 18px; margin-bottom: 12px; }
.row { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: 14px; align-items: center; }
.row:last-child { border-bottom: 0; }
.date { color: var(--muted); min-width: 90px; }
.tag { background: #e8f8ef; color: var(--gd); font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 4px; }

.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.col { background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.col img { height: 150px; width: 100%; object-fit: cover; }
.col div { padding: 14px; }
.col h4 { font-size: 15px; margin-bottom: 6px; }
.col p { font-size: 13px; color: var(--muted); }

.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.box { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 24px; text-align: center; }
.box.help { border-top: 4px solid var(--g); }
.sns { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.sns a { border: 1px solid var(--line); padding: 7px 12px; border-radius: 16px; font-size: 12px; font-weight: 700; }

footer { background: #1b1b1b; color: #aaa; padding: 40px 20px 16px; }
.foot { max-width: 1080px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.foot h4 { color: #fff; font-size: 13px; margin-bottom: 10px; }
.foot a { display: block; font-size: 13px; margin-bottom: 7px; }
.copy { max-width: 1080px; margin: 18px auto 0; border-top: 1px solid #333; padding-top: 12px; text-align: center; font-size: 12px; }

@media (max-width: 860px) {
  .os-pick, .cats, .cols, .two, .foot { grid-template-columns: 1fr; }
}

img{height:auto}
.wrap,.news,.cols,.two,footer{content-visibility:auto;contain-intrinsic-size:auto 520px}