:root{--navy:#102c45;--blue:#126f8b;--teal:#208c9b;--red:#08758b;--ink:#203243;--muted:#637382;--line:#d9e2e8;--soft:#f4f7f9;--white:#fff;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:Arial,Helvetica,sans-serif;line-height:1.6}a{color:inherit}.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}.top{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.topin{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:900;letter-spacing:.04em;color:var(--navy);text-decoration:none;font-size:19px}.nav{display:flex;gap:20px;align-items:center;font-size:14px;font-weight:700}.nav a{text-decoration:none}.cta{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;background:var(--navy);color:white!important;text-decoration:none;font-weight:800;border-radius:3px}.crumbs{padding:22px 0 0;font-size:13px;color:var(--muted)}.crumbs a{text-decoration:none}.hero{padding:42px 0 56px;background:linear-gradient(180deg,#fff 0%,#f5f8fa 100%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,.85fr);gap:58px;align-items:center}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:.16em;font-weight:900;color:var(--teal)}h1{margin:8px 0 18px;color:var(--navy);font-size:clamp(42px,5.8vw,76px);line-height:.98;letter-spacing:-.045em}.lead{max-width:740px;font-size:19px;color:#4d6070}.hero-img{background:#fff;border:1px solid var(--line);padding:28px;box-shadow:18px 20px 0 rgba(32,140,155,.12)}.hero-img img{width:100%;height:390px;object-fit:contain;display:block}.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:-1px}.fact{background:#fff;padding:22px}.fact small{display:block;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.1em;font-weight:800}.fact strong{display:block;margin-top:4px;color:var(--navy);font-size:18px}.section{padding:72px 0}.section.alt{background:var(--soft)}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}h2{margin:0 0 18px;color:var(--navy);font-size:clamp(30px,4vw,50px);line-height:1.05;letter-spacing:-.03em}.copy p{margin:0 0 18px}.panel{background:#fff;border:1px solid var(--line);padding:30px}.panel dl{display:grid;grid-template-columns:1fr;gap:0;margin:0}.panel div{padding:15px 0;border-bottom:1px solid var(--line)}.panel div:last-child{border:0}.panel dt{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:800}.panel dd{margin:4px 0 0;font-weight:800;color:var(--navy)}.tags{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:22px 0 0;list-style:none}.tags li{padding:7px 10px;background:#e9f2f4;color:var(--navy);font-size:12px;font-weight:800}.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.gallery figure{margin:0;border:1px solid var(--line);background:#fff}.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}.gallery figcaption{padding:10px 12px;color:var(--muted);font-size:12px}.related{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.related a{display:block;padding:18px;border:1px solid var(--line);text-decoration:none;background:white;font-weight:800;color:var(--navy)}.related a:hover{border-color:var(--teal)}.contact{background:var(--navy);color:white;padding:56px 0}.contact h2{color:white}.contact p{max-width:780px;color:#d9e6ee}.contact .cta{background:white;color:var(--navy)!important;margin-right:10px}.secondary{display:inline-flex;min-height:46px;align-items:center;padding:11px 18px;border:1px solid #7891a4;color:white;text-decoration:none;font-weight:800}.footer{padding:30px 0;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
@media(max-width:820px){.wrap{width:min(100% - 28px,var(--max))}.topin{min-height:64px}.nav>a:not(.cta){display:none}.hero{padding:28px 0 38px}.hero-grid,.grid2{grid-template-columns:1fr;gap:30px}h1{font-size:clamp(36px,12vw,54px)}.lead{font-size:17px}.hero-img{padding:16px;box-shadow:10px 12px 0 rgba(32,140,155,.12)}.hero-img img{height:280px}.facts{grid-template-columns:1fr}.fact{padding:16px 18px}.section{padding:50px 0}.gallery,.related{grid-template-columns:1fr}.contact .cta,.secondary{width:100%;margin:0 0 10px;text-align:center}.panel{padding:22px}}

a:focus-visible,button:focus-visible{outline:3px solid #08758b;outline-offset:4px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}


/* MTX V6 – human-readable TSUGAMI series guide */
.series-showcase{padding:82px 0 72px;background:linear-gradient(180deg,#f6f8fa 0%,#ffffff 46%,#f7f9fb 100%);border-top:1px solid #e3e9ee;border-bottom:1px solid #e3e9ee}
.series-shell{width:min(1180px,calc(100% - 40px));margin:0 auto}
.series-intro{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:54px;align-items:end;margin-bottom:30px}
.series-intro h2{margin:8px 0 0;font-size:clamp(2.15rem,4vw,4.2rem);line-height:.98;letter-spacing:-.05em;color:#15364a;max-width:780px}
.series-intro-copy{border-left:3px solid #56b9cc;padding-left:24px}
.series-intro-copy p{margin:0 0 10px;color:#526674;font-size:1.02rem;line-height:1.7}
.series-jumpbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:14px 16px;margin-bottom:24px;border:1px solid #dce5ea;background:#fff;border-radius:16px;box-shadow:0 8px 26px rgba(18,56,74,.05)}
.series-jump-label{font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.09em;color:#6d7f8b;margin-right:6px}
.series-jumpbar a{display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;background:#edf5f7;color:#18465c;font-weight:700;font-size:.83rem;text-decoration:none}
.series-jumpbar a:hover{background:#dceef2}
.series-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.series-card{position:relative;display:flex;flex-direction:column;min-height:310px;padding:28px;border-radius:20px;border:1px solid #dce4e9;background:rgba(255,255,255,.96);box-shadow:0 14px 38px rgba(16,47,64,.07);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.series-card:before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:#204e66;opacity:.9}
.series-card:hover{transform:translateY(-3px);box-shadow:0 20px 46px rgba(16,47,64,.11);border-color:#bfd4de}
.series-card--featured{background:linear-gradient(145deg,#153b50 0%,#1b5068 100%);border-color:#153b50}
.series-card--featured:before{background:#61c5d5}
.series-card-top{display:flex;align-items:center;gap:12px;margin-bottom:19px}
.series-code{display:inline-flex;align-items:center;justify-content:center;min-width:50px;height:42px;padding:0 12px;border-radius:12px;background:#153b50;color:#fff;font-size:.79rem;font-weight:900;letter-spacing:.06em}
.series-kicker{font-size:.75rem;text-transform:uppercase;letter-spacing:.09em;font-weight:800;color:#5f7887}
.series-card h3{margin:0 0 12px;color:#15364a;font-size:1.45rem;line-height:1.08;letter-spacing:-.025em}
.series-desc{margin:0 0 15px;color:#4f6370;line-height:1.62}
.series-fit{margin:0 0 20px;padding-top:14px;border-top:1px solid #e6ecef;color:#344f5e;line-height:1.55;font-size:.92rem}
.series-fit strong{color:#163f55}
.series-link{margin-top:auto;color:#0c6c86;font-weight:800;text-decoration:none;display:inline-flex;align-items:center;gap:7px}
.series-card--featured .series-code{background:#fff;color:#153b50}
.series-card--featured .series-kicker{color:#a8e5ed}.series-card--featured h3{color:#fff}.series-card--featured .series-desc{color:#dbe9ee}.series-card--featured .series-fit{border-color:rgba(255,255,255,.18);color:#e6f1f4}.series-card--featured .series-fit strong{color:#fff}.series-card--featured .series-link{color:#a8e5ed}
.series-decision{display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;margin-top:22px;padding:28px 30px;border-radius:22px;background:#fff;border:1px solid #d7e3e8;box-shadow:0 15px 42px rgba(16,47,64,.07)}
.series-decision-mark{width:62px;height:62px;display:grid;place-items:center;border-radius:18px;background:#153b50;color:#fff;font-weight:900;font-size:1.15rem}
.series-decision-kicker{margin:0 0 5px;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;font-weight:900;color:#5d7a89}
.series-decision h3{margin:0 0 7px;color:#15364a;font-size:1.35rem}.series-decision p{margin:0;color:#586d79;line-height:1.6}
.series-decision-cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 18px;border-radius:12px;background:#153b50;color:#fff;font-weight:800;text-decoration:none;white-space:nowrap}.series-decision-cta:hover{background:#1c536e}
@media(max-width:900px){.series-showcase{padding:64px 0 58px}.series-intro{grid-template-columns:1fr;gap:22px}.series-intro-copy{border-left:0;border-top:3px solid #56b9cc;padding:18px 0 0}.series-grid{grid-template-columns:1fr}.series-card{min-height:0}.series-decision{grid-template-columns:auto 1fr}.series-decision-cta{grid-column:1/-1;width:100%}}
@media(max-width:560px){.series-shell{width:min(100% - 24px,1180px)}.series-showcase{padding:48px 0}.series-intro h2{font-size:2.2rem}.series-card{padding:22px;border-radius:16px}.series-jumpbar{border-radius:14px}.series-decision{grid-template-columns:1fr;padding:22px}.series-decision-mark{width:52px;height:52px}.series-decision-cta{grid-column:auto}}