:root{
  --bg:#ffffff; --soft:#f6f7f9; --ink:#0d1117; --muted:#5b6573;
  --line:#e6e8ec; --accent:#2563eb; --accent2:#0ea5e9; --dark:#0b1220;
  --radius:16px; --shadow:0 10px 30px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font-family:"Noto Sans JP",system-ui,-apple-system,"Hiragino Kaku Gothic ProN",sans-serif;
  line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;letter-spacing:.02em;font-size:18px}
.brand span{color:var(--accent)}
.nav .links{display:flex;gap:28px;font-size:14px;font-weight:500}
.nav .links a{color:var(--muted)}
.nav .links a:hover,.nav .links a.active{color:var(--ink)}

/* hero */
.hero{background:radial-gradient(1200px 500px at 70% -10%,#1e293b 0%,var(--dark) 60%);
  color:#fff;padding:96px 0 88px}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.25;margin:0 0 18px;font-weight:800;letter-spacing:.01em}
.hero p{font-size:clamp(15px,2vw,19px);color:#c5cdd9;max-width:640px;margin:0 0 32px}
.hero .pill{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;
  color:#bfdbfe;background:rgba(37,99,235,.18);border:1px solid rgba(37,99,235,.4);
  padding:6px 14px;border-radius:999px;margin-bottom:22px}
.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:700;
  padding:14px 26px;border-radius:12px;font-size:15px;transition:.2s}
.btn:hover{background:#1d4ed8;transform:translateY(-1px)}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,.3);margin-left:10px}
.btn.ghost:hover{background:rgba(255,255,255,.08)}

/* sections */
section{padding:80px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 48px}
.sec-head .k{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--accent);text-transform:uppercase}
.sec-head h2{font-size:clamp(24px,3.4vw,36px);margin:10px 0 12px;font-weight:800}
.sec-head p{color:var(--muted);margin:0}
.alt{background:var(--soft)}

/* before-after */
.ba-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
@media(max-width:760px){.ba-grid{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow)}
.ba{position:relative;overflow:hidden;user-select:none;background:#eef1f5}
.ba-img{width:100%;display:block}
.ba-before{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
.ba-divider{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;
  box-shadow:0 0 0 1px rgba(0,0,0,.15);pointer-events:none}
.ba-divider::after{content:"⟺";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:38px;height:38px;border-radius:50%;background:#fff;color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:16px;box-shadow:var(--shadow)}
.ba-range{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize}
.ba-tag{position:absolute;top:12px;font-size:11px;font-weight:700;letter-spacing:.08em;
  color:#fff;background:rgba(13,17,23,.6);padding:4px 10px;border-radius:999px;pointer-events:none}
.ba-tag-l{left:12px}.ba-tag-r{right:12px;background:rgba(37,99,235,.85)}
.card .cap{padding:16px 18px}
.card .cap h3{margin:0 0 4px;font-size:16px;font-weight:700}
.card .cap p{margin:0;font-size:13px;color:var(--muted)}
.card .cap .badge{display:inline-block;font-size:11px;font-weight:600;color:var(--accent);
  background:#eff4ff;border:1px solid #dbe7ff;padding:2px 8px;border-radius:999px;margin-top:8px}

/* variants */
.var-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:860px){.var-grid{grid-template-columns:repeat(2,1fr)}}
.var{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.var img{width:100%;aspect-ratio:3/2;object-fit:contain;background:#fff}
.var span{display:block;text-align:center;font-size:12px;font-weight:600;padding:8px;color:var(--muted)}

/* steps (pipeline) */
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:36px}
@media(max-width:760px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.step .n{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
  border-radius:10px;background:var(--accent);color:#fff;font-weight:800;margin-bottom:12px}
.step h3{margin:0 0 6px;font-size:17px}
.step p{margin:0;color:var(--muted);font-size:14px}
.step .tool{display:inline-block;margin-top:10px;font-size:11px;color:#475569;background:var(--soft);
  border:1px solid var(--line);padding:3px 9px;border-radius:999px}
.diagram{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 28px;box-shadow:var(--shadow)}

/* flow diagram (vertical pipeline) */
.vflow{max-width:720px;margin:0 auto;display:flex;flex-direction:column;align-items:center}
.vterm{display:inline-flex;align-items:baseline;gap:10px;background:var(--dark);color:#fff;
  border-radius:999px;padding:13px 26px;font-weight:800;font-size:16px;box-shadow:var(--shadow)}
.vterm.out{background:var(--accent)}
.vterm small{font-weight:600;font-size:12px;color:#c5cdd9}
.vterm.out small{color:#dbeafe}
.vnode{width:100%;background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:15px 18px;box-shadow:var(--shadow);display:flex;gap:14px;align-items:flex-start;text-align:left}
.vnode .num{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;background:var(--accent);color:#fff;font-weight:800;font-size:14px}
.vnode .bd{flex:1;min-width:0}
.vnode .bd .t{margin:0;font-weight:700;font-size:15px;line-height:1.4}
.vnode .bd .cond{display:inline-block;font-size:11px;font-weight:600;color:#92400e;background:#fffbeb;
  border:1px solid #fde68a;border-radius:999px;padding:1px 9px;margin-left:8px;white-space:nowrap}
.vnode .tools{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-top:9px}
.vnode .tools .tg{font-size:11.5px;font-weight:600;color:#334155;background:var(--soft);
  border:1px solid var(--line);border-radius:7px;padding:3px 9px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.vnode .tools .arr{color:var(--muted);font-size:12px;font-weight:700}
.vconn{width:2px;height:20px;background:#cbd5e1;position:relative}
.vconn::after{content:"";position:absolute;left:50%;bottom:-1px;transform:translateX(-50%);
  border-left:5px solid transparent;border-right:5px solid transparent;border-top:7px solid #cbd5e1}
.vconn.derive{width:0;background:transparent;border-left:2px dashed #93b4f5;height:26px}
.vconn.derive::after{border-top-color:#93b4f5}
.derive-cap{font-size:11px;font-weight:600;letter-spacing:.04em;color:var(--accent);margin:2px 0 8px}
.vnode.derive{border:1px dashed var(--accent);background:#f5f9ff}
.vnode.derive .num{background:var(--accent2)}
.vnode.derive .vars{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}
.vnode.derive .vars span{font-size:11px;font-weight:600;color:var(--accent);background:#fff;
  border:1px solid #dbe7ff;border-radius:999px;padding:3px 10px}
@media(max-width:560px){
  .vnode{flex-direction:column;gap:8px}
  .vnode .bd .cond{margin-left:0;margin-top:4px}
}
.note{margin-top:28px;background:#fffbeb;border:1px solid #fde68a;color:#78350f;
  border-radius:12px;padding:16px 20px;font-size:14px}

/* footer */
footer{background:var(--dark);color:#9aa4b2;padding:48px 0;font-size:13px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
footer a{color:#cbd5e1}
.center{text-align:center}
.mt{margin-top:40px}

/* showroom / video */
.showcase{background:var(--dark);color:#fff}
.showcase .sec-head h2{color:#fff}
.showcase .sec-head .k{color:var(--accent2)}
.showcase .sec-head p{color:#c5cdd9}
.video-wrap{max-width:940px;margin:0 auto;border-radius:var(--radius);overflow:hidden;
  box-shadow:0 24px 70px rgba(0,0,0,.55);border:1px solid rgba(255,255,255,.08);background:#000}
.video-wrap video{width:100%;display:block}
.flow-iv{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;margin-bottom:30px}
.flow-iv .thumb{width:220px;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.15);background:#fff}
.flow-iv .thumb img{width:100%;display:block}
.flow-iv .ar{font-size:30px;color:var(--accent2);font-weight:800}
.flow-iv .lab{display:block;text-align:center;font-size:12px;color:#9aa4b2;margin-top:8px}
.vid-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:30px}
@media(max-width:760px){.vid-grid{grid-template-columns:1fr}}
.vid-card{border-radius:14px;overflow:hidden;border:1px solid rgba(255,255,255,.1);background:#0f1830}
.vid-card video{width:100%;display:block}
.vid-card .vc{padding:12px 16px;font-size:13px;color:#c5cdd9}
.vid-card .vc b{color:#fff;font-weight:700;display:block;margin-bottom:2px}

/* ===== SNS 投稿プレビュー ===== */
.pv-layout{display:grid;grid-template-columns:340px 1fr;gap:28px;align-items:start}
@media(max-width:860px){.pv-layout{grid-template-columns:1fr}}
.pv-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.pv-panel h4{margin:0 0 10px;font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.seg{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.seg button{flex:1;min-width:58px;border:1px solid var(--line);background:var(--soft);border-radius:10px;padding:9px 6px;font-size:12px;font-weight:700;color:#374151;cursor:pointer;transition:.15s}
.seg button.on{background:var(--accent);color:#fff;border-color:var(--accent)}
.pv-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:16px}
.pv-thumbs img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:8px;border:2px solid transparent;cursor:pointer;background:#f1f3f5}
.pv-thumbs img.on{border-color:var(--accent)}
.pv-field{margin-bottom:12px}
.pv-field label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}
.pv-field input,.pv-field textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:9px 11px;font:inherit;font-size:13px;resize:vertical;box-sizing:border-box}
.pv-upload{display:block;text-align:center;border:1px dashed #cbd5e1;border-radius:10px;padding:12px;font-size:12px;color:var(--muted);cursor:pointer;margin-bottom:6px}
.pv-stage{min-height:600px;display:flex;align-items:flex-start;justify-content:center;background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:34px 20px}

/* instagram feed */
.ig{width:375px;background:#fff;border:1px solid #dbdbdb;border-radius:10px;overflow:hidden;font-family:system-ui,sans-serif;box-shadow:var(--shadow)}
.ig-head{display:flex;align-items:center;gap:10px;padding:11px 14px}
.ig-ava{width:34px;height:34px;border-radius:50%;object-fit:cover;background:#eee}
.ig-ava.ring{padding:2px;border:2px solid #e1306c}
.ig-user{font-weight:700;font-size:13px;color:#111}
.ig-more{margin-left:auto;color:#111;font-weight:800;letter-spacing:1px}
.ig-photo{width:100%;aspect-ratio:1;object-fit:contain;background:#fafafa;display:block}
.ig-acts{display:flex;gap:14px;padding:10px 14px 6px;font-size:20px}
.ig-acts .sp{margin-left:auto}
.ig-likes{padding:2px 14px;font-weight:700;font-size:13px;color:#111}
.ig-cap{padding:3px 14px 6px;font-size:13px;color:#111;line-height:1.5;white-space:pre-wrap;word-break:break-word}
.ig-cap b{font-weight:700;margin-right:6px}
.ig-cap .tag{color:#00376b}
.ig-time{padding:2px 14px 14px;font-size:10px;color:#8e8e8e;letter-spacing:.04em}

/* instagram story */
.ig-story{width:300px;aspect-ratio:9/16;border-radius:20px;overflow:hidden;position:relative;background:#000;box-shadow:var(--shadow)}
.ig-story>img{width:100%;height:100%;object-fit:cover}
.ig-story .bar{position:absolute;top:12px;left:12px;right:12px;height:3px;background:rgba(255,255,255,.4);border-radius:2px}
.ig-story .bar::after{content:"";position:absolute;left:0;top:0;bottom:0;width:45%;background:#fff;border-radius:2px}
.ig-story .su{position:absolute;top:26px;left:14px;right:14px;display:flex;align-items:center;gap:8px;color:#fff;font-size:12px;font-weight:700;text-shadow:0 1px 4px rgba(0,0,0,.6)}
.ig-story .su img{width:30px;height:30px;border-radius:50%;border:2px solid #fff;object-fit:cover}
.ig-story .cap{position:absolute;bottom:34px;left:16px;right:16px;color:#fff;font-size:15px;font-weight:700;line-height:1.5;text-shadow:0 1px 6px rgba(0,0,0,.7);white-space:pre-wrap}

/* instagram grid (profile) */
.ig-grid{width:375px;background:#fff;border:1px solid #dbdbdb;border-radius:10px;overflow:hidden;box-shadow:var(--shadow)}
.ig-grid .gh{display:flex;align-items:center;gap:18px;padding:16px}
.ig-grid .gh>img{width:58px;height:58px;border-radius:50%;object-fit:cover;border:2px solid #e1306c;padding:2px}
.ig-grid .gh .st{display:flex;gap:18px;font-size:12px;color:#111}
.ig-grid .gh .st b{display:block;font-size:15px;text-align:center}
.ig-grid .gu{padding:0 16px 12px;font-size:13px;font-weight:700}
.ig-cells{display:grid;grid-template-columns:repeat(3,1fr);gap:2px}
.ig-cells img{width:100%;aspect-ratio:1;object-fit:cover;background:#fafafa}

/* X (twitter) */
.xc{width:440px;background:#fff;border:1px solid #e1e8ed;border-radius:16px;padding:14px 16px;font-family:system-ui,sans-serif;box-shadow:var(--shadow)}
.xc .xh{display:flex;gap:10px;align-items:center}
.xc .xa{width:44px;height:44px;border-radius:50%;object-fit:cover;background:#eee}
.xc .xn{font-weight:800;font-size:14px;color:#0f1419}
.xc .xu{color:#536471;font-size:13px}
.xc .xmore{margin-left:auto;color:#536471;font-weight:800}
.xc .xt{margin:10px 0;font-size:15px;color:#0f1419;line-height:1.5;white-space:pre-wrap;word-break:break-word}
.xc .xt .tag{color:#1d9bf0}
.xc .xi{width:100%;aspect-ratio:16/10;object-fit:contain;border-radius:16px;border:1px solid #e1e8ed;background:#fafafa;display:block}
.xc .xacts{display:flex;justify-content:space-between;margin-top:12px;color:#536471;font-size:13px}

/* ===== preview v2: 高フィデリティ ===== */
.pv-acts svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;cursor:pointer}
.ig-foot{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;border-top:1px solid #efefef;font-size:13px;color:#8e8e8e}
.ig-foot .post{color:#0095f6;font-weight:700;opacity:.5}

/* profile mode */
.ig-prof{width:440px;max-width:100%;background:#fff;border:1px solid #dbdbdb;border-radius:10px;overflow:hidden;box-shadow:var(--shadow);font-family:system-ui,sans-serif}
.ig-prof .top{display:flex;align-items:center;gap:22px;padding:22px 20px}
.ig-prof .av{width:84px;height:84px;border-radius:50%;padding:3px;flex:0 0 auto;background:linear-gradient(45deg,#f9ce34,#ee2a7b,#6228d7)}
.ig-prof .av img{width:100%;height:100%;border-radius:50%;object-fit:cover;border:3px solid #fff;background:#eee}
.ig-prof .meta{flex:1}
.ig-prof .row1{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.ig-prof .uname{font-size:18px;font-weight:400}
.ig-prof .btn2{background:#efefef;border:0;border-radius:8px;padding:6px 12px;font-size:12px;font-weight:700;cursor:pointer;color:#111}
.ig-prof .stats{display:flex;gap:22px;font-size:13px}
.ig-prof .stats b{font-weight:700}
.ig-prof .bio{padding:0 20px 14px;font-size:13px;line-height:1.5}
.ig-prof .bio .nm{font-weight:700}
.ig-prof .tabs{display:flex;justify-content:center;gap:42px;border-top:1px solid #dbdbdb}
.ig-prof .tb{display:flex;align-items:center;gap:6px;padding:12px 0;font-size:11px;font-weight:700;letter-spacing:.08em;color:#8e8e8e;text-transform:uppercase}
.ig-prof .tb svg{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:2}
.ig-prof .tb.on{color:#111;border-top:1px solid #111;margin-top:-1px}
.ig-prof .cells{display:grid;grid-template-columns:repeat(3,1fr);gap:2px}
.ig-prof .cells img{width:100%;aspect-ratio:1;object-fit:cover;background:#fafafa;display:block}
.ig-prof .cells .cell{position:relative}
.ig-prof .cells .newp{outline:2px solid #0095f6;outline-offset:-2px}
.ig-prof .cells .newp .dot{position:absolute;top:5px;right:5px;width:8px;height:8px;border-radius:50%;background:#0095f6}

/* story phone frame */
.ig-phone{border:8px solid #1a1a1a !important;border-radius:40px !important;width:300px}

/* dark mode */
.pv-toggle{display:flex;gap:6px;margin-bottom:16px}
.pv-stage.dark{background:#0a0a0a}
.pv-stage.dark .ig,.pv-stage.dark .ig-prof,.pv-stage.dark .ig-grid{background:#000;border-color:#262626;color:#fff}
.pv-stage.dark .ig-user,.pv-stage.dark .ig-likes,.pv-stage.dark .ig-cap,.pv-stage.dark .ig-prof .uname,.pv-stage.dark .ig-prof .bio,.pv-stage.dark .ig-grid .gu,.pv-stage.dark .ig-grid .st{color:#fff}
.pv-stage.dark .ig-photo,.pv-stage.dark .ig-cells img,.pv-stage.dark .ig-prof .cells img{background:#121212}
.pv-stage.dark .ig-more,.pv-stage.dark .ig-acts{color:#fff}
.pv-stage.dark .ig-prof .btn2{background:#363636;color:#fff}
.pv-stage.dark .ig-prof .tabs{border-color:#262626}
.pv-stage.dark .ig-prof .tb.on{color:#fff;border-top-color:#fff}
.pv-stage.dark .ig-foot{border-color:#262626}
.pv-stage.dark .xc{background:#000;border-color:#262626}
.pv-stage.dark .xc .xn{color:#fff}
.pv-stage.dark .xc .xt{color:#e7e9ea}
.pv-stage.dark .xc .xi{background:#121212;border-color:#262626}