/* STSEEK about — sample. No external fonts/images; CSP style-src 'self' safe (no inline styles). */
:root{
  --bg:#fff;--bg2:#f6f9fc;--bg3:#eef3f9;
  --text:#0b1220;--text2:#4a5a73;--text3:#64748b;
  --accent:#2563eb;--accent2:#1d4ed8;--accent-deep:#1e40af;--accent-soft:#eff4ff;
  --green:#059669;--sky:#0284c7;--orange:#ea580c;--pink:#db2777;
  --line:rgba(15,23,42,.10);--line2:rgba(15,23,42,.07);
  --sh-sm:0 1px 3px rgba(15,23,42,.06),0 1px 2px rgba(15,23,42,.03);
  --sh:0 4px 18px rgba(15,23,42,.07);--sh-lg:0 14px 44px rgba(15,23,42,.10);
  --r:16px;--r-sm:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{width:min(1120px,100% - 40px);margin-inline:auto}
.narrow{width:min(760px,100% - 40px)}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;z-index:200}
.skip:focus{left:12px}

/* nav */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;padding:14px 0;border-bottom:1px solid transparent;transition:background .25s,box-shadow .25s,border-color .25s}
.nav.scrolled{background:rgba(255,255,255,.88);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);border-color:var(--line2);box-shadow:var(--sh-sm)}
.nav-in{display:flex;align-items:center;gap:28px}
.logo{font-weight:900;letter-spacing:.14em;font-size:1.15rem;color:var(--text)}
.nav-links{display:flex;gap:24px;font-size:.92rem;color:var(--text2)}
.nav-links a:hover{color:var(--accent)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-login{font-size:.88rem;color:var(--text2)}
.nav-login:hover{color:var(--accent)}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;padding:2px;background:#fff}
.lang button{font:inherit;font-size:.78rem;border:0;background:none;padding:4px 10px;border-radius:999px;color:var(--text3);cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--accent-soft);color:var(--accent2);font-weight:700}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 30px;border-radius:12px;font-weight:700;font-size:1rem;background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(37,99,235,.25);transition:transform .2s,box-shadow .2s,background .2s}
.btn:hover{background:var(--accent2);transform:translateY(-1px);box-shadow:0 10px 24px rgba(37,99,235,.3)}
.btn-sm{padding:8px 16px;font-size:.86rem;border-radius:10px;box-shadow:none}
.btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line);box-shadow:var(--sh-sm)}
.btn-ghost:hover{background:var(--bg2);color:var(--accent2);box-shadow:var(--sh-sm)}
.btn-white{background:#fff;color:var(--accent-deep);box-shadow:none}
.btn-white:hover{background:var(--accent-soft)}
.btn-block{display:flex;width:100%}

/* type */
.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.18em;color:var(--accent);margin-bottom:12px}
.eyebrow-light{color:#bfdbfe}
h1{font-size:clamp(1.9rem,4.4vw,3.05rem);font-weight:900;line-height:1.3;letter-spacing:-.02em;margin-bottom:22px}
h2{font-size:clamp(1.5rem,3vw,2.15rem);font-weight:900;line-height:1.4;letter-spacing:-.01em;margin-bottom:14px}
h3{font-size:1.08rem;font-weight:800;line-height:1.5;margin-bottom:8px}
h1,h2,h3,.lead,.sec-lead{word-break:auto-phrase;line-break:strict}
.ib{display:inline-block}
.grad{background:linear-gradient(90deg,var(--accent) 0%,#7c3aed 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:1.06rem;color:var(--text2);max-width:34em;margin-bottom:30px}
.sec{padding:96px 0}
.sec-alt{background:var(--bg2)}
.sec-lead{color:var(--text2);max-width:46em;margin-bottom:44px}

/* hero */
.hero{padding:136px 0 88px;background:radial-gradient(1100px 520px at 85% 10%,#eaf1ff 0%,rgba(234,241,255,0) 60%),linear-gradient(180deg,#fbfcfe 0%,#fff 70%)}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:.9rem;color:var(--text2)}
.hero-points li::before{content:"✓";color:var(--green);font-weight:900;margin-right:6px}

/* mock dashboard */
.mock{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--sh-lg);overflow:hidden}
.mock-bar{display:flex;align-items:center;gap:6px;padding:12px 16px;border-bottom:1px solid var(--line2);background:var(--bg2)}
.mock-bar span{width:10px;height:10px;border-radius:50%;background:#e2e8f0}
.mock-bar b{margin-left:10px;font-size:.8rem;color:var(--text3);font-weight:700}
.mock-body{padding:22px}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:22px}
.kpi{background:var(--bg2);border:1px solid var(--line2);border-radius:12px;padding:12px}
.kpi small{display:block;font-size:.72rem;color:var(--text3)}
.kpi strong{font-size:1.05rem;font-weight:900}
.mock-h{font-size:.8rem;font-weight:800;color:var(--text2);margin-bottom:10px}
.bars{display:grid;gap:10px;margin-bottom:20px}
.bar{display:grid;grid-template-columns:7.5em 1fr 3em;align-items:center;gap:10px;font-size:.82rem}
.bar em{font-style:normal;font-weight:800;text-align:right}
.track{display:block;height:10px;border-radius:99px;background:var(--bg3);overflow:hidden}
.fill{display:block;height:100%;border-radius:99px;background:var(--accent)}
.fill.c2{background:var(--sky)}.fill.c3{background:var(--green)}.fill.c4{background:var(--orange)}
.w38{width:76%}.w27{width:54%}.w21{width:42%}.w14{width:28%}
.mock-note{display:flex;flex-direction:column;gap:2px;background:var(--accent-soft);border:1px solid #dbe6ff;border-radius:12px;padding:12px 14px;font-size:.84rem}
.mock-note b{font-size:.74rem;color:var(--accent2)}
.mock-cap{font-size:.72rem;color:var(--text3);text-align:right;padding:0 16px 12px}

/* cards */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card,.feat{background:#fff;border:1px solid var(--line2);border-radius:var(--r);padding:26px;box-shadow:var(--sh-sm)}
.card p,.feat p{color:var(--text2);font-size:.94rem}
.num{display:inline-block;font-weight:900;color:var(--accent);font-size:.85rem;letter-spacing:.1em;margin-bottom:10px}
.feat h3::before{content:"";display:block;width:28px;height:4px;border-radius:4px;background:var(--accent);margin-bottom:14px}

/* use cases */
.cases{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.case{background:#fff;border:1px solid var(--line2);border-radius:var(--r);padding:28px;box-shadow:var(--sh)}
.case>p{color:var(--text2);font-size:.95rem;margin-bottom:14px}
.case ul li{position:relative;padding-left:20px;font-size:.92rem;margin-top:6px}
.case ul li::before{content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.tag{display:inline-block;font-size:.7rem;font-weight:800;letter-spacing:.14em;padding:4px 10px;border-radius:999px;margin-bottom:12px}
.t1{background:#eff4ff;color:var(--accent2)}.t2{background:#ecfdf5;color:var(--green)}.t3{background:#e0f2fe;color:var(--sky)}.t4{background:#fdf2f8;color:var(--pink)}
.more{display:grid;gap:10px;margin:6px 0 14px}
.more div{display:grid;grid-template-columns:7.5em 1fr;gap:12px;padding:10px 12px;background:var(--bg2);border-radius:10px;font-size:.9rem}
.more dt{font-weight:800}
.more dd{color:var(--text2)}
.add{border:1px dashed var(--line);border-radius:10px;text-align:center;padding:10px;font-size:.9rem;color:var(--accent2);font-weight:700}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}
.steps li{background:#fff;border:1px solid var(--line2);border-radius:var(--r);padding:26px;box-shadow:var(--sh-sm);position:relative}
.steps span{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;font-weight:900;margin-bottom:12px}
.steps p{color:var(--text2);font-size:.92rem}

/* examples of work — these are options, not a bundled feature list */
.offer-section{border-top:1px solid var(--line2)}
.offer-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:22px}
.offer-list li{background:var(--bg2);border:1px solid var(--line2);border-radius:12px;padding:15px 18px;font-size:.94rem}
.offer-list li::before{content:"・";color:var(--accent);font-weight:900;margin-right:6px}
.offer-note{color:var(--text2);font-size:.9rem}

/* pricing */
.plans{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:start}
.plan{background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;box-shadow:var(--sh-sm)}
.plan-main{border:2px solid var(--accent);box-shadow:var(--sh-lg)}
.plan h3{font-size:1.4rem}
.plan-badge{display:inline-block;font-size:.74rem;font-weight:800;color:#fff;background:var(--accent);padding:4px 12px;border-radius:999px;margin-bottom:12px}
.plan-badge-alt{background:var(--text2)}
.plan-desc{color:var(--text2);font-size:.94rem;margin-bottom:18px}
.price{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:8px}
.price div{background:var(--bg2);border-radius:12px;padding:14px}
.price small{display:block;font-size:.76rem;color:var(--text3)}
.price strong{font-size:1.9rem;font-weight:900;letter-spacing:-.01em}
.price strong span{font-size:.78rem;font-weight:700;color:var(--text3);margin-left:6px}
.price-quote{display:block;background:var(--bg2);border-radius:12px;padding:18px}
.price-quote strong{font-size:1.15rem}
.price-note{font-size:.84rem;color:var(--text3);margin-bottom:18px}
.plan-scope{background:var(--bg2);border:1px solid var(--line2);border-radius:12px;padding:16px 18px;margin-bottom:24px;color:var(--text2);font-size:.92rem}
.pay{margin-top:28px;background:#fff;border:1px solid var(--line2);border-radius:var(--r);padding:24px 28px}
.pay h3{font-size:.98rem}
.pay li{font-size:.86rem;color:var(--text2);padding-left:16px;position:relative;margin-top:6px}
.pay li::before{content:"・";position:absolute;left:0}

/* faq */
details{border-bottom:1px solid var(--line);padding:18px 4px}
details:first-of-type{border-top:1px solid var(--line);margin-top:28px}
summary{cursor:pointer;font-weight:800;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-weight:900;font-size:1.2rem;line-height:1}
details[open] summary::after{content:"−"}
details p{color:var(--text2);margin-top:10px;font-size:.95rem}

/* cta */
.cta{padding:88px 0;text-align:center;background:linear-gradient(135deg,var(--accent-deep) 0%,var(--accent) 60%,#4f46e5 100%);color:#fff}
.cta h2{color:#fff}
.cta p:not(.eyebrow){color:#dbeafe;margin-bottom:28px}

/* footer */
.foot{background:#0b1220;color:#cbd5e1;padding:48px 0 32px;font-size:.88rem}
.foot .logo{color:#fff;margin-bottom:6px}
.foot-in{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-bottom:24px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-tag{color:#94a3b8}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 22px}
.foot-links a:hover{color:#fff}
.foot-notes{padding-top:20px;color:#94a3b8;font-size:.8rem;display:grid;gap:8px}

/* responsive */
@media (max-width:980px){
  .hero-in{grid-template-columns:1fr}
  .grid4,.steps{grid-template-columns:repeat(2,1fr)}
  .plans{grid-template-columns:1fr}
}
@media (max-width:760px){
  .nav-links,.nav-login{display:none}
  .nav-in{gap:12px}
  .nav-right{gap:8px}
  .hero{padding:112px 0 64px}
  .sec{padding:72px 0}
  .grid3,.grid4,.steps,.cases,.offer-list{grid-template-columns:1fr}
  .price{grid-template-columns:1fr}
  .kpis{grid-template-columns:1fr 1fr 1fr}
  .kpi{padding:10px 8px}
  .kpi strong{font-size:.92rem}
  .bar{grid-template-columns:6.5em 1fr 2.6em}
}
@media (max-width:420px){
  .btn-sm{display:none}
  .more div{grid-template-columns:1fr;gap:2px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn,.nav{transition:none}}