:root{
  --ink:#13233f;
  --ink-soft:#4a5a75;
  --bg:#fbfaf6;
  --card:#ffffff;
  --line:#e3e6ec;
  --sky:#eaf2fb;
  --navy:#0f2a4d;
  --navy-2:#1b4378;
  --sun:#f5a524;
  --sun-deep:#c97a00;
  --sun-soft:#fff3d9;
  --ok:#1d7a4d;
  --radius:14px;
  --shadow:0 1px 2px rgba(19,35,63,.06),0 8px 24px rgba(19,35,63,.07);
  --wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px;-webkit-text-size-adjust:100%}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--navy-2);text-underline-offset:3px}
a:hover{color:var(--sun-deep)}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em;margin:0 0 .6em;font-weight:750}
h1{font-size:clamp(2rem,4.6vw,3.2rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:10px 14px;z-index:99}
.skip:focus{left:10px;top:10px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.05rem}
.logo svg{width:34px;height:34px;flex:none}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:9px 12px;border-radius:9px;text-decoration:none;color:var(--ink);font-size:.95rem;font-weight:600}
.nav a:hover,.nav a[aria-current="page"]{background:var(--sky);color:var(--navy)}
.nav .inq{background:var(--sun);color:#2b1c00}
.nav .inq:hover{background:#ffb83f;color:#2b1c00}
.nav .inq span{display:inline-block;min-width:1.4em;text-align:center;background:#fff;border-radius:99px;margin-left:6px;font-size:.8rem;padding:0 6px}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:8px 12px;font:inherit;font-weight:700;color:var(--ink);cursor:pointer}

/* hero */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 60%,#2b6cb0 100%);color:#fff;position:relative;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;padding-top:64px;padding-bottom:64px}
.hero h1{color:#fff}
.hero p{color:#dbe7f7;font-size:1.1rem;max-width:52ch}
.hero .sun{position:absolute;right:-90px;top:-90px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(245,165,36,.55),rgba(245,165,36,0) 68%)}
.hero-art{position:relative}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn{display:inline-block;border:0;border-radius:11px;padding:12px 20px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;background:var(--sun);color:#2b1c00;transition:transform .12s,background .12s}
.btn:hover{background:#ffb83f;color:#2b1c00;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn.ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.btn.dark{background:var(--navy);color:#fff}
.btn.dark:hover{background:var(--navy-2);color:#fff}
.btn.line{background:#fff;color:var(--navy);border:1.5px solid var(--line)}
.btn.line:hover{border-color:var(--sun);color:var(--navy)}
.btn.small{padding:8px 13px;font-size:.9rem}
.btn[disabled]{opacity:.65;cursor:default;transform:none}

.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding-top:18px;padding-bottom:18px}
.stat b{display:block;font-size:1.6rem;color:var(--navy)}
.stat span{color:var(--ink-soft);font-size:.92rem}

section{padding:56px 0}
.lead{color:var(--ink-soft);max-width:70ch}
.sec-head{display:flex;justify-content:space-between;align-items:end;gap:20px;flex-wrap:wrap;margin-bottom:22px}
.sec-head h2{margin:0}

/* type cards */
.types{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.type-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px;transition:transform .15s,border-color .15s}
.type-card:hover{transform:translateY(-3px);border-color:var(--sun);color:var(--ink)}
.type-card img{border-radius:10px;background:var(--sky);aspect-ratio:3/2;object-fit:contain;width:100%}
.type-card h3{margin:.4em 0 0}
.type-card p{margin:0;color:var(--ink-soft);font-size:.95rem}
.type-card .cnt{font-weight:700;color:var(--sun-deep);font-size:.9rem}

/* product grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.card[hidden]{display:none}
.card-img{background:linear-gradient(180deg,#eef4fb,#e2ecf8);display:block}
.card-img img{width:100%;aspect-ratio:3/2;object-fit:contain}
.card-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.brand{margin:0;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);font-weight:700}
.card h3{margin:0;font-size:1.05rem}
.card h3 a{text-decoration:none;color:var(--ink)}
.card h3 a:hover{color:var(--sun-deep)}
.badges{display:flex;flex-wrap:wrap;gap:6px}
.badge{font-size:.76rem;font-weight:700;padding:3px 9px;border-radius:99px;background:var(--sky);color:var(--navy)}
.badge.mono{background:#dfe9f8}
.badge.poly{background:#e0ecff;color:#1d4fa3}
.badge.amorf{background:#f3e8df;color:#6b4326}
.badge.tenko{background:#e5e8ee;color:#2b3445}
.badge.old{background:#fdeacc;color:#7a4a00}
.badge.black{background:#1b2230;color:#fff}
.mini{display:grid;grid-template-columns:1fr 1fr;gap:6px 10px;margin:6px 0 4px;font-size:.88rem}
.mini div{display:flex;flex-direction:column}
.mini dt{color:var(--ink-soft);font-size:.78rem}
.mini dd{margin:0;font-weight:700}
.price{margin:auto 0 0;font-weight:700;color:var(--ink-soft);font-size:.92rem}
.card-actions{display:flex;gap:8px;margin-top:8px}
.card-actions .btn{flex:1;text-align:center}

/* filters */
.filters{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:grid;grid-template-columns:2fr repeat(3,1fr) 1.2fr;gap:12px;margin-bottom:14px;box-shadow:var(--shadow)}
.filters label{display:flex;flex-direction:column;gap:4px;font-size:.8rem;font-weight:700;color:var(--ink-soft)}
.filters input[type=search],.filters select{font:inherit;font-weight:500;padding:10px 11px;border:1.5px solid var(--line);border-radius:10px;background:#fff;color:var(--ink)}
.filters input:focus,.filters select:focus{outline:2px solid var(--sun);border-color:var(--sun)}
.filters .chk{flex-direction:row;align-items:center;gap:8px;font-size:.92rem;color:var(--ink);align-self:end;padding-bottom:10px}
.count{margin:0 0 14px;color:var(--ink-soft);font-weight:600}
.empty{padding:30px;text-align:center;background:#fff;border:1px dashed var(--line);border-radius:var(--radius);display:none}

/* article text */
.prose{max-width:74ch}
.prose h2{margin-top:1.6em}
.prose h2:first-child{margin-top:0}
.prose h3{margin-top:1.4em}
.prose ul{padding-left:1.2em}
.prose li{margin:.3em 0}
.home-text{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band{background:var(--sun-soft)}
.cta-band .wrap{display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band h2{margin:0 0 .2em}
.cta-band p{margin:0;color:var(--ink-soft)}

/* detail */
.crumbs{font-size:.88rem;color:var(--ink-soft);padding:18px 0 0}
.crumbs a{color:var(--ink-soft)}
.detail{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;padding:20px 0 40px}
.detail .pic{background:linear-gradient(180deg,#eef4fb,#e2ecf8);border-radius:var(--radius);border:1px solid var(--line);padding:18px;position:sticky;top:90px;align-self:start}
table.spec{width:100%;border-collapse:collapse;margin:14px 0 20px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
table.spec th,table.spec td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:.96rem;vertical-align:top}
table.spec th{width:42%;color:var(--ink-soft);font-weight:600;background:#fafbfd}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0}
.note-box{background:var(--sun-soft);border-radius:12px;padding:14px 16px;font-size:.95rem;margin:16px 0}
.src{font-size:.85rem;color:var(--ink-soft)}
table.cmp{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:.94rem}
table.cmp th,table.cmp td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.cmp th{background:var(--sky)}
.table-scroll{overflow-x:auto}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:10px 0}
summary{cursor:pointer;font-weight:700}
.inq-list{list-style:none;margin:0;padding:0}
.inq-list li{display:flex;justify-content:space-between;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:8px 0}
.inq-list input{width:70px;padding:7px;border:1.5px solid var(--line);border-radius:8px;font:inherit}
textarea{width:100%;min-height:200px;font:inherit;padding:12px;border:1.5px solid var(--line);border-radius:12px;background:#fff}
.field{display:flex;flex-direction:column;gap:4px;margin:12px 0;font-weight:700;font-size:.9rem}
.field input{font:inherit;font-weight:400;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fff}

/* footer */
.site-footer{background:var(--navy);color:#cfdbee;padding:44px 0 26px;margin-top:20px}
.site-footer a{color:#fff}
.site-footer a:hover{color:var(--sun)}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.foot h3{color:#fff;font-size:1rem;margin-bottom:.7em}
.foot ul{list-style:none;margin:0;padding:0}
.foot li{margin:.35em 0}
.foot small{display:block;margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,255,255,.15);color:#a9bbd4;grid-column:1/-1}

@media (max-width:980px){
  .types{grid-template-columns:repeat(2,1fr)}
  .hero .wrap{grid-template-columns:1fr}
  .hero-art{max-width:520px}
  .detail{grid-template-columns:1fr}
  .detail .pic{position:static}
  .filters{grid-template-columns:1fr 1fr}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .foot{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .menu-btn{display:inline-block}
  .nav{display:none;position:absolute;left:0;right:0;top:66px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 16px}
  .nav.open{display:flex}
}
@media (max-width:560px){
  body{font-size:16px}
  section{padding:40px 0}
  .types{grid-template-columns:1fr}
  .filters{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr}
  .hero .wrap{padding-top:40px;padding-bottom:40px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}