/* สารส้ม.com — design tokens */
:root{
  --ink:#0b2530; --ink-2:#34505b; --muted:#5f7680;
  --deep:#0b3b4a; --teal:#0e7c86; --teal-2:#11939e; --aqua:#3cc7cf; --mist:#e7f5f6; --mist-2:#f3fafa;
  --line:#06c755; --line-d:#05a948; --amber:#f0a132;
  --bg:#ffffff; --card:#ffffff; --border:#dbe7ea; --border-2:#c6d8dc;
  --warn-bg:#fff6e8; --warn-bd:#f2c887; --note-bg:#eaf6f7; --note-bd:#9fd6db;
  --r:14px; --r-lg:22px; --shadow:0 1px 2px rgba(11,37,48,.06),0 6px 24px rgba(11,37,48,.07);
  --shadow-lg:0 2px 4px rgba(11,37,48,.06),0 18px 50px rgba(11,37,48,.12);
  --f-head:"Anuphan","Sarabun",system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;
  --f-body:"Sarabun",system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;
  --w:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;font-family:var(--f-body);font-size:17.5px;line-height:1.75;color:var(--ink);background:var(--bg);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--teal);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--deep)}
h1,h2,h3,h4{font-family:var(--f-head);line-height:1.3;color:var(--ink);margin:0 0 .5em;letter-spacing:-.005em}
h1{font-size:clamp(1.9rem,1.2rem + 2.6vw,3rem);font-weight:700}
h2{font-size:clamp(1.4rem,1.1rem + 1.1vw,2rem);font-weight:700}
h3{font-size:1.18rem;font-weight:600}
p{margin:0 0 1em}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--w);margin:0 auto;padding-inline:20px}
.narrow{max-width:820px}
.small{font-size:.9rem}.muted{color:var(--muted)}
.skip{position:absolute;left:-999px;top:8px;background:var(--deep);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:3px solid var(--aqua);outline-offset:2px;border-radius:6px}
.ico{display:inline-flex;width:1.15em;height:1.15em;flex:none}
.ico svg{width:100%;height:100%}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;font-family:var(--f-head);font-weight:600;font-size:1rem;line-height:1.2;padding:.72em 1.15em;border-radius:999px;border:1.5px solid transparent;text-decoration:none;cursor:pointer;transition:transform .15s ease,background-color .15s,box-shadow .15s,color .15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-lg{font-size:1.06rem;padding:.9em 1.4em}
.btn-block{width:100%}
.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--deep);color:#fff}
.btn-line{background:var(--line);color:#fff;box-shadow:0 6px 18px rgba(6,199,85,.28)}.btn-line:hover{background:var(--line-d);color:#fff}
.btn-outline{border-color:var(--border-2);color:var(--deep);background:#fff}.btn-outline:hover{border-color:var(--teal);color:var(--teal)}
.btn-ghost{color:var(--deep);background:transparent}.btn-ghost:hover{background:var(--mist)}
.btn-light{background:#fff;color:var(--deep)}.btn-light:hover{background:var(--mist);color:var(--deep)}
.btn-outline-light{border-color:rgba(255,255,255,.5);color:#fff}.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#fff}
.link-arrow{display:inline-flex;align-items:center;gap:.35em;font-family:var(--f-head);font-weight:600;text-decoration:none}
.link-arrow .ico{transition:transform .2s}.link-arrow:hover .ico{transform:translateX(3px)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid rgba(219,231,234,.8)}
.header-in{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex:none}
.logo-mark{width:40px;height:40px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-family:var(--f-head);font-size:1.4rem;font-weight:700;color:var(--deep)}
.brand-text strong span{color:var(--teal)}
.brand-text small{font-size:.76rem;color:var(--muted);margin-top:2px}
.main-nav{margin-left:auto}
.main-nav ul{display:flex;gap:2px;list-style:none;margin:0;padding:0}
.main-nav a{display:block;padding:8px 12px;border-radius:10px;font-family:var(--f-head);font-weight:500;font-size:.98rem;color:var(--ink-2);text-decoration:none}
.main-nav a:hover{background:var(--mist);color:var(--deep)}
.main-nav a[aria-current]{color:var(--teal);background:var(--mist)}
.header-cta{display:flex;align-items:center;gap:8px}
.header-cta .btn{padding:.6em 1em;font-size:.95rem}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:12px;background:#fff;color:var(--deep);padding:10px;cursor:pointer}
@media (max-width:1100px){.hide-sm{display:none}}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .main-nav{position:fixed;inset:72px 0 auto 0;background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);padding:10px 16px 18px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:.2s ease;margin:0}
  .main-nav.open{transform:none;opacity:1;pointer-events:auto}
  .main-nav ul{flex-direction:column}
  .main-nav a{padding:13px 12px;font-size:1.05rem;border-bottom:1px solid var(--mist)}
  .header-cta{margin-left:auto}
}
@media (max-width:520px){
  .header-cta .btn-line span:not(.ico){display:none}
  .header-cta .btn-line{padding:.62em;width:44px;height:44px}
  .brand-text strong{font-size:1.22rem}
  .logo-mark{width:34px;height:34px}
}

/* breadcrumbs */
.crumbs ol{display:flex;flex-wrap:wrap;gap:4px;list-style:none;margin:0;padding:16px 0 0;font-size:.88rem;color:var(--muted)}
.crumbs li+li::before{content:"›";margin:0 6px;color:var(--border-2)}
.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--teal)}

/* sections */
.section{padding-block:clamp(48px,6vw,88px)}
.section-flush{padding-top:24px}
.section-tint{background:linear-gradient(180deg,var(--mist-2),var(--mist))}
.section-dark{background:radial-gradient(1200px 400px at 90% -10%,rgba(60,199,207,.25),transparent 60%),var(--deep);color:#d9eef0}
.section-dark h2{color:#fff}
.sec-head{max-width:720px;margin-bottom:28px}
.sec-head-sm{margin-top:48px;margin-bottom:20px}
.sec-head p:last-child{color:var(--muted)}
.row-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;max-width:none}
.eyebrow{display:inline-flex;align-items:center;gap:.4em;font-family:var(--f-head);font-weight:600;font-size:.9rem;color:var(--teal);letter-spacing:.02em;margin-bottom:.6em;text-transform:none}
.eyebrow-light{color:var(--aqua)}
.h-sub{margin:36px 0 18px;font-size:1.45rem}
.h-sub:first-child{margin-top:8px}

/* hero */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(900px 500px at 85% 20%,rgba(60,199,207,.22),transparent 60%),
  radial-gradient(700px 420px at 0% 100%,rgba(14,124,134,.10),transparent 60%),
  linear-gradient(180deg,#f5fbfb 0%,#fff 100%)}
.hero-in{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding-block:clamp(40px,6vw,84px)}
.hero h1{font-size:clamp(2rem,1.2rem + 3vw,3.35rem);line-height:1.22;margin-bottom:.45em}
.grad{background:linear-gradient(90deg,var(--teal),var(--aqua));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{font-size:1.14rem;color:var(--ink-2);max-width:40em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 22px}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px 22px;list-style:none;margin:0;padding:0;color:var(--ink-2);font-size:.95rem}
.hero-trust li{display:flex;align-items:center;gap:.45em}
.hero-trust .ico{color:var(--teal)}
.hero-art img{width:100%;filter:drop-shadow(0 30px 40px rgba(11,59,74,.15))}
@media (max-width:860px){.hero-in{grid-template-columns:1fr;gap:8px;padding-top:28px}.hero-art{max-width:340px;margin:0 auto}}

/* grids & cards */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media (max-width:1024px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow)}
.p-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s}
.p-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--note-bd)}
.p-media{display:block;background:linear-gradient(160deg,var(--mist-2),var(--mist));aspect-ratio:4/3}
.p-media img{width:100%;height:100%;object-fit:contain}
.grid-2 .p-card{flex-direction:row}
.grid-2 .p-media{flex:0 0 42%;aspect-ratio:auto}
@media (max-width:600px){.grid-2 .p-card{flex-direction:column}.grid-2 .p-media{aspect-ratio:4/3}}
.p-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.p-body h3{margin:.4em 0 .15em;font-size:1.2rem}
.p-body h3 a{color:var(--ink);text-decoration:none}
.p-body h3 a:hover{color:var(--teal)}
.p-body>p{font-size:.95rem;color:var(--ink-2);margin-bottom:.6em}
.p-chem{font-size:.86rem!important;color:var(--muted)!important}
.formula-inline{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;white-space:nowrap}
.p-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:8px;padding-top:12px;border-top:1px dashed var(--border)}
.price{font-family:var(--f-head);font-weight:600;color:var(--deep)}
.tag{display:inline-block;align-self:flex-start;font-family:var(--f-head);font-size:.76rem;font-weight:600;padding:3px 10px;border-radius:999px}
.tag-alum{background:var(--mist);color:var(--teal)}
.tag-chlorine{background:#eef3ff;color:#3656b3}

/* uses */
.uses{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:1024px){.uses{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.uses{grid-template-columns:1fr}}
.use{display:block;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:22px;text-decoration:none;color:var(--ink);transition:.2s}
.use:hover{border-color:var(--teal);transform:translateY(-2px);box-shadow:var(--shadow)}
.use-ico{font-size:2rem;display:block;margin-bottom:8px}
.use p{color:var(--ink-2);font-size:.95rem;margin:0}

/* how */
.how{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
@media (max-width:860px){.how{grid-template-columns:1fr}}
.mini-steps{counter-reset:s;list-style:none;padding:0;margin:20px 0 26px}
.mini-steps li{counter-increment:s;position:relative;padding:8px 0 8px 48px}
.mini-steps li::before{content:counter(s);position:absolute;left:0;top:6px;width:34px;height:34px;border-radius:50%;background:var(--mist);color:var(--teal);font-family:var(--f-head);font-weight:700;display:grid;place-items:center}

/* tools band */
.tools-band{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
@media (max-width:860px){.tools-band{grid-template-columns:1fr}}
.tool-links{display:grid;gap:14px}
.tool-link{display:flex;align-items:center;gap:16px;padding:20px 22px;border-radius:var(--r-lg);background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);color:#fff;text-decoration:none;transition:.2s}
.tool-link:hover{background:rgba(255,255,255,.13);color:#fff;transform:translateX(3px)}
.tool-link>.ico:first-child{width:2.2em;height:2.2em;color:var(--aqua)}
.tool-link span:not(.ico){flex:1;display:flex;flex-direction:column}
.tool-link strong{font-family:var(--f-head);font-size:1.12rem}
.tool-link small{color:#a9cfd4}

/* why */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:1024px){.why{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.why{grid-template-columns:1fr}}
.why-item{padding:22px;border-radius:var(--r-lg);background:var(--mist-2);border:1px solid var(--border)}
.why-item>.ico{width:2.2em;height:2.2em;color:var(--teal);margin-bottom:10px}
.why-item p{margin:0;color:var(--ink-2);font-size:.96rem}

/* article cards */
.a-card a{display:flex;flex-direction:column;height:100%;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:22px;text-decoration:none;color:var(--ink);transition:.2s}
.a-card a:hover{border-color:var(--teal);box-shadow:var(--shadow);transform:translateY(-2px)}
.a-card h3{font-size:1.1rem;margin:.5em 0}
.a-card p{font-size:.94rem;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.a-cat{display:inline-block;align-self:flex-start;font-family:var(--f-head);font-size:.78rem;font-weight:600;color:var(--teal);background:var(--mist);padding:3px 10px;border-radius:999px}
.a-meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:.88rem}

/* faq */
.faq h2{margin-bottom:16px}
.faq details{border:1px solid var(--border);border-radius:var(--r);background:#fff;margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:16px 52px 16px 20px;font-family:var(--f-head);font-weight:600;font-size:1.04rem;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:20px;top:50%;width:10px;height:10px;border-right:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:translateY(-70%) rotate(45deg);transition:.2s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq details[open]{border-color:var(--note-bd)}
.faq-a{padding:0 20px 6px;color:var(--ink-2)}
.faq section+section,.faq+.faq{margin-top:28px}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--deep),#0d5f6a 60%,var(--teal));color:#e3f4f5;padding-block:48px}
.cta-in{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center}
.cta-band h2{color:#fff;margin-bottom:.3em}
.cta-band p{margin:0;color:#c8e6e9}
.cta-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
@media (max-width:960px){.cta-in{grid-template-columns:1fr}.cta-actions{justify-content:flex-start}}

/* page head */
.page-head{padding-block:28px 34px;background:linear-gradient(180deg,#fff,var(--mist-2))}
.page-head h1{max-width:900px;margin-bottom:.35em}
.page-head p{max-width:780px;color:var(--ink-2);font-size:1.08rem}
.page-head-tool{background:radial-gradient(600px 240px at 90% 0,rgba(60,199,207,.18),transparent 60%),linear-gradient(180deg,#fff,var(--mist-2))}
.page-head-gov{background:radial-gradient(700px 300px at 90% 0,rgba(14,124,134,.14),transparent 60%),linear-gradient(180deg,#fff,var(--mist-2))}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-block;padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--ink-2);font-size:.92rem;text-decoration:none}
a.chip:hover{border-color:var(--teal);color:var(--teal)}
.chip-tool{background:var(--mist);border-color:var(--note-bd)}

/* product page */
.product{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;padding-top:10px}
@media (max-width:900px){.product{grid-template-columns:1fr;gap:24px}}
.pm-frame{background:radial-gradient(circle at 50% 35%,#fff,var(--mist) 75%);border:1px solid var(--border);border-radius:28px;padding:20px;aspect-ratio:4/3;display:grid;place-items:center}
.pm-frame img{width:100%;height:100%;object-fit:contain}
.pm-badges{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:14px 0 0}
.pm-badges li{display:flex;align-items:center;gap:6px;font-size:.9rem;padding:6px 12px;background:var(--mist-2);border:1px solid var(--border);border-radius:999px;color:var(--ink-2)}
.pm-badges .ico{color:var(--teal)}
.product-info h1{margin:.3em 0 .1em;font-size:clamp(1.8rem,1.3rem + 2vw,2.6rem)}
.p-en{color:var(--muted);margin-bottom:.8em}
.lead{font-size:1.12rem;color:var(--ink-2)}
.buy-box{margin:22px 0 10px;padding:20px;border-radius:var(--r-lg);background:var(--mist-2);border:1px solid var(--border);display:grid;gap:16px}
.buy-price{display:flex;flex-direction:column}
.buy-price small{color:var(--muted)}
.buy-price strong{font-family:var(--f-head);font-size:1.6rem;color:var(--deep);line-height:1.3}
.buy-price span{font-size:.9rem;color:var(--muted)}
.buy-actions{display:grid;gap:10px}
.buy-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:420px){.buy-row{grid-template-columns:1fr}}
.product-detail{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
@media (max-width:900px){.product-detail{grid-template-columns:1fr}}
.pd-main>h2{margin-top:1.4em}.pd-main>h2:first-child{margin-top:0}
.pd-side{position:sticky;top:96px;display:grid;gap:16px}
.side-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:20px}
.side-card h2{font-size:1.08rem}
.side-links{list-style:none;padding:0;margin:0}
.side-links li{border-top:1px solid var(--mist);padding:10px 0}
.side-links a{text-decoration:none;color:var(--ink);font-weight:600;font-size:.96rem}
.side-links a:hover{color:var(--teal)}
.side-gov>.ico{width:2em;height:2em;color:var(--teal);margin-bottom:6px}
.side-gov p{font-size:.95rem;color:var(--ink-2)}

/* content blocks */
.table-wrap{overflow-x:auto;margin:0 0 1.4em;border:1px solid var(--border);border-radius:var(--r);background:#fff}
table{width:100%;border-collapse:collapse;font-size:.96rem}
th,td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--mist)}
thead th{background:var(--mist-2);font-family:var(--f-head);font-weight:600;color:var(--deep);white-space:nowrap}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
table.spec th{width:36%;background:var(--mist-2);font-weight:600;color:var(--ink-2)}
.checklist{list-style:none;padding:0;margin:0 0 1.2em}
.checklist li{position:relative;padding:4px 0 4px 32px}
.checklist li::before{content:"";position:absolute;left:2px;top:.62em;width:20px;height:20px;border-radius:50%;background:var(--mist) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%230e7c86' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='m6 12 4 4 8-8'/%3E%3C/svg%3E") center/14px no-repeat}
.steps{counter-reset:st;list-style:none;padding:0;margin:0 0 1.4em}
.steps li{counter-increment:st;position:relative;padding:10px 0 10px 50px;border-left:2px solid var(--mist);margin-left:17px;padding-left:34px}
.steps li:last-child{border-left-color:transparent}
.steps li::before{content:counter(st);position:absolute;left:-18px;top:8px;width:34px;height:34px;border-radius:50%;background:var(--teal);color:#fff;font-family:var(--f-head);font-weight:700;display:grid;place-items:center;font-size:.95rem;box-shadow:0 0 0 4px #fff}
.section-tint .steps li::before{box-shadow:0 0 0 4px var(--mist-2)}
.note,.warn{border-radius:var(--r);padding:14px 18px;margin:0 0 1.4em;font-size:.97rem}
.note{background:var(--note-bg);border-left:4px solid var(--teal)}
.warn{background:var(--warn-bg);border-left:4px solid var(--amber)}
.warn ul{margin:.3em 0 0;padding-left:1.2em}
.warn-sm{font-size:.88rem;padding:10px 14px}
.formula{font-family:var(--f-head);background:#fff;border:1px dashed var(--note-bd);border-radius:var(--r);padding:12px 16px;margin:0 0 12px;color:var(--deep)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:1.4em}
@media (max-width:600px){.two-col{grid-template-columns:1fr}}
.card-soft{background:var(--mist-2);border:1px solid var(--border);border-radius:var(--r);padding:16px 18px}
.card-soft ul{margin:0;padding-left:1.2em}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:0 0 1.4em;counter-reset:f}
.flow div{background:#fff;border:1px solid var(--border);border-radius:12px;padding:12px;display:flex;flex-direction:column;position:relative}
.flow strong{font-family:var(--f-head);color:var(--deep);font-size:.98rem}
.flow span{font-size:.84rem;color:var(--muted)}
@media (max-width:700px){.flow{grid-template-columns:repeat(2,1fr)}}

/* article */
.article-head{padding-top:18px;padding-bottom:10px;max-width:900px;margin-left:auto;margin-right:auto}
.article-head h1{margin:.4em 0 .3em;font-size:clamp(1.8rem,1.2rem + 2.2vw,2.7rem)}
.article-desc{font-size:1.14rem;color:var(--ink-2)}
.a-byline{color:var(--muted);font-size:.9rem;border-top:1px solid var(--border);padding-top:12px}
.article-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;align-items:start;padding-bottom:56px;max-width:1120px}
.toc{position:sticky;top:96px;font-size:.93rem}
.toc summary{font-family:var(--f-head);font-weight:700;cursor:pointer;margin-bottom:8px;color:var(--deep)}
.toc ol{list-style:none;padding:0;margin:0;border-left:2px solid var(--mist)}
.toc a{display:block;padding:6px 0 6px 14px;margin-left:-2px;border-left:2px solid transparent;color:var(--ink-2);text-decoration:none;line-height:1.45}
.toc a:hover,.toc a.active{color:var(--teal);border-left-color:var(--teal)}
@media (max-width:900px){.article-layout{grid-template-columns:1fr;gap:10px}.toc{position:static;background:var(--mist-2);border:1px solid var(--border);border-radius:var(--r);padding:12px 16px}}
.prose{max-width:760px}
.prose h2{margin-top:1.8em;padding-top:.2em}
.prose h2:first-child{margin-top:0}
.prose ol:not(.steps),.prose ul:not(.checklist){padding-left:1.3em}
.prose li{margin-bottom:.3em}
.article-products{margin-top:36px;padding:22px;background:var(--mist-2);border:1px solid var(--border);border-radius:var(--r-lg)}
.article-products h2{margin-top:0;font-size:1.25rem}
.mini-products{display:grid;gap:10px}
.mini-p{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:8px 14px 8px 8px;text-decoration:none;color:var(--ink)}
.mini-p:hover{border-color:var(--teal)}
.mini-p img{width:72px;height:54px;object-fit:contain;background:var(--mist);border-radius:10px}
.mini-p span:not(.ico){flex:1;display:flex;flex-direction:column;line-height:1.35}
.mini-p small{color:var(--muted)}
.mini-p .ico{color:var(--teal)}
.disclaimer{margin-top:28px;font-size:.86rem;color:var(--muted);border-top:1px solid var(--border);padding-top:14px}

/* tools / forms */
.tool{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:24px;align-items:start}
@media (max-width:900px){.tool{grid-template-columns:1fr}}
fieldset{border:0;padding:0;margin:0 0 22px}
fieldset:last-child{margin-bottom:0}
legend{font-family:var(--f-head);font-weight:700;font-size:1.08rem;color:var(--deep);margin-bottom:12px;padding:0}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.seg label{position:relative;cursor:pointer}
.seg input{position:absolute;opacity:0;inset:0}
.seg span{display:block;padding:9px 14px;border:1.5px solid var(--border);border-radius:12px;background:#fff;font-size:.95rem;line-height:1.35;text-align:center;transition:.15s}
.seg small{color:var(--muted);font-size:.8rem}
.seg input:checked+span{border-color:var(--teal);background:var(--mist);color:var(--deep);font-weight:600}
.seg input:focus-visible+span{outline:3px solid var(--aqua);outline-offset:2px}
.seg-wrap label{flex:1 1 130px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field>span{font-size:.92rem;font-weight:600;color:var(--ink-2)}
input:not([type=radio]):not([type=checkbox]),select,textarea{font:inherit;font-size:1rem;width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:12px;background:#fff;color:var(--ink);transition:border-color .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px rgba(14,124,134,.12)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field-row.three{grid-template-columns:1fr 1fr 1fr}
@media (max-width:520px){.field-row,.field-row.three{grid-template-columns:1fr}}
.hint{font-size:.86rem;color:var(--muted);margin:-4px 0 0}
.result{position:sticky;top:92px}
.card-accent{background:linear-gradient(180deg,#fff,var(--mist-2));border-color:var(--note-bd)}
.r-label{font-family:var(--f-head);font-weight:600;color:var(--muted);margin:0;font-size:1rem}
.r-big{font-family:var(--f-head);font-weight:700;font-size:clamp(2.2rem,1.6rem + 2vw,3rem);color:var(--deep);margin:0;line-height:1.2}
.r-sub{color:var(--teal);font-weight:600;margin-bottom:12px}
.r-list{margin:0 0 14px;padding:12px 0;border-block:1px solid var(--border)}
.r-list div{display:flex;justify-content:space-between;gap:12px;padding:3px 0;font-size:.95rem}
.r-list dt{color:var(--muted)}.r-list dd{margin:0;font-weight:600;text-align:right}
.r-note{font-size:.88rem;color:var(--ink-2)}
.result .btn{margin-top:8px}
.q-items{display:grid;gap:8px}
.q-item{display:grid;grid-template-columns:auto 1fr 1fr;gap:10px;align-items:center;border:1.5px solid var(--border);border-radius:12px;padding:8px 10px 8px 14px;background:#fff}
.q-item:has(input:checked){border-color:var(--teal);background:var(--mist-2)}
.q-item input[type=checkbox]{width:20px;height:20px;accent-color:var(--teal)}
.q-name{font-weight:600}
.q-item .q-qty{padding:8px 12px}
@media (max-width:520px){.q-item{grid-template-columns:auto 1fr}.q-item .q-qty{grid-column:1/-1}}
.q-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.q-preview{white-space:pre-wrap;font-family:var(--f-body);font-size:.95rem;background:#fff;border:1px dashed var(--border-2);border-radius:12px;padding:14px;min-height:180px;margin:10px 0}
.form-error{color:#b3261e;font-weight:600}

/* order & contact */
.order-steps{list-style:none;padding:0;margin:0 0 28px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:900px){.order-steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.order-steps{grid-template-columns:1fr}}
.order-steps li{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:20px}
.order-steps h2{font-size:1.1rem;margin:.5em 0 .3em}
.order-steps p{margin:0;color:var(--ink-2);font-size:.95rem}
.os-n{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--teal);color:#fff;font-family:var(--f-head);font-weight:700}
.contact-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px}
@media (max-width:900px){.contact-cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:460px){.contact-cards{grid-template-columns:1fr}}
.c-card{display:flex;flex-direction:column;gap:2px;padding:20px;border-radius:var(--r-lg);border:1px solid var(--border);background:#fff;text-decoration:none;color:var(--ink);transition:.2s;min-width:0}
.c-card:hover{border-color:var(--teal);box-shadow:var(--shadow);color:var(--ink)}
.c-card>.ico{width:1.8em;height:1.8em;color:var(--teal);margin-bottom:8px}
.c-card strong{font-family:var(--f-head)}
.c-card span{font-family:var(--f-head);font-size:1.12rem;color:var(--deep);overflow-wrap:anywhere}
.c-card small{color:var(--muted)}
.c-line{background:linear-gradient(160deg,#effcf3,#fff);border-color:#b6ebc8}
.c-line>.ico{color:var(--line)}
.contact-split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:760px){.contact-split{grid-template-columns:1fr}}
.contact-split h2{display:flex;align-items:center;gap:8px;font-size:1.2rem}
.contact-split h2 .ico{color:var(--teal)}
.guide-box{margin-top:44px}
.nf{text-align:center;padding-block:70px}
.nf .hero-actions{justify-content:center}
.nf p{margin-inline:auto}
.nf-code{font-family:var(--f-head);font-size:5rem;font-weight:700;color:var(--mist);-webkit-text-stroke:2px var(--teal);margin:0;line-height:1}

/* footer */
.site-footer{background:#082a35;color:#a9c6cc;padding-top:56px;font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.3fr;gap:32px}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr}}
.site-footer h2{color:#fff;font-size:1rem;margin-bottom:12px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{padding:4px 0;display:flex;gap:8px;align-items:flex-start}
.site-footer li .ico{margin-top:.3em;color:var(--aqua)}
.site-footer a{color:#cfe4e8;text-decoration:none;display:inline-flex;gap:8px;align-items:flex-start}
.site-footer a:hover{color:#fff}
.brand-light .brand-text strong{color:#fff}.brand-light .brand-text small{color:#8fb3ba}
.f-brand p{margin-top:14px}
.sme{display:flex;gap:8px;align-items:flex-start;color:#d5ecef}
.sme .ico{color:var(--aqua);margin-top:.3em}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;border-top:1px solid rgba(255,255,255,.08);margin-top:40px;padding-block:18px 22px;font-size:.86rem}
.footer-bottom p{margin:0}
.footer-bottom a{display:inline;text-decoration:underline;text-underline-offset:3px}

/* mobile bottom bar */
.mobile-bar{display:none}
@media (max-width:760px){
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
  .mobile-bar{display:grid;grid-template-columns:1fr 1.2fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--border);box-shadow:0 -6px 20px rgba(11,37,48,.08);padding-bottom:env(safe-area-inset-bottom)}
  .mobile-bar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;height:62px;font-family:var(--f-head);font-weight:600;font-size:.82rem;color:var(--deep);text-decoration:none}
  .mobile-bar .ico{width:1.45em;height:1.45em}
  .mobile-bar .mb-line{background:var(--line);color:#fff}
  .result{position:static}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.mobile-bar,.site-footer,.cta-band,.toc,.hero-actions{display:none!important}body{font-size:12pt}}