/* نویان البرز — «آبِ زلال»: آبیِ اقیانوسی، فیروزه‌ای، سفیدِ آبی؛ Noto Sans Arabic */
@font-face{font-family:NS;font-weight:400;font-display:swap;src:url(/a/fonts/noto-sans-arabic-arabic-400-normal.woff2) format('woff2');unicode-range:U+0600-06FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE80-FEFC}
@font-face{font-family:NS;font-weight:400;font-display:swap;src:url(/a/fonts/noto-sans-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+2000-206F}
@font-face{font-family:NS;font-weight:500 700;font-display:swap;src:url(/a/fonts/noto-sans-arabic-arabic-600-normal.woff2) format('woff2');unicode-range:U+0600-06FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE80-FEFC}
@font-face{font-family:NS;font-weight:800 900;font-display:swap;src:url(/a/fonts/noto-sans-arabic-arabic-800-normal.woff2) format('woff2');unicode-range:U+0600-06FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE80-FEFC}
@font-face{font-family:NS;font-weight:600 900;font-display:swap;src:url(/a/fonts/noto-sans-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+2000-206F}

:root{--bg:#f3fafc;--surface:#fff;--ink:#062a40;--muted:#4f6b7c;--line:#d9ecf2;--brand:#063a5c;--brand-ink:#fff;--accent:#18b6d8;
--aqua:#18b6d8;--aqua-l:#d9f4fb;--ocean:#063a5c;--radius:20px;--radius-sm:14px;
--shadow:0 1px 2px rgb(6 58 92/.05),0 16px 40px rgb(6 58 92/.10);--font-body:NS,Tahoma,sans-serif;--font-display:NS,Tahoma,sans-serif;
--ft-bg:#052c45;--ft-ink:#dff3fa}
body{line-height:1.95}
h1,h2,h3,.sec__title{font-weight:800;letter-spacing:-.2px}
.hd{background:color-mix(in srgb,#fff 90%,transparent)}
.brand svg{width:44px;height:44px}
.brand__text b{font-size:20px;font-weight:800;color:var(--ocean)}
.hd__call{background:var(--ocean);color:#fff}
.nav a:hover,.nav a[aria-current=page]{background:var(--aqua-l);color:var(--ocean)}
.btn--brand{background:var(--ocean);color:#fff}
.btn--aqua{background:var(--aqua);color:#fff}
.btn--aqua:hover{background:#109dbd}
.card__img--art{background:#eaf7fb}
.card__price{color:#0b7fa0}
.pd__price{background:linear-gradient(120deg,#effbfe,#dcf4fa);border:1px solid #c5ebf4}
.pd__price b{color:var(--ocean)}
.pd__coll{color:#0b7fa0}
.ft{background:radial-gradient(600px 260px at 50% 0%,rgb(24 182 216/.18),transparent 70%),var(--ft-bg)}
.ft .brand__text b{color:#fff}

/* ---------- home ---------- */
.n-hero{position:relative;overflow:hidden;color:#e6f7fc;background:radial-gradient(700px 420px at 20% 30%,rgb(24 182 216/.35),transparent 65%),linear-gradient(170deg,#0a5a85,#063a5c 55%,#04263c)}
.n-hero__in{position:relative;z-index:1;display:grid;gap:28px;align-items:center;padding-block:clamp(34px,6vw,80px) clamp(70px,9vw,120px)}
@media (min-width:940px){.n-hero__in{grid-template-columns:1.1fr .9fr;gap:40px}}
.n-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgb(255 255 255/.10);color:#bfeefa;font-size:13.5px;font-weight:600}
.n-hero h1{font-size:clamp(32px,5.6vw,58px);line-height:1.4;margin:16px 0 10px;color:#fff}
.n-hero h1 em{font-style:normal;color:#7fe2f6}
.n-hero p{color:#c3e4ef;max-width:540px}
.n-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.n-hero .btn--ghost{color:#fff}
.n-drop{position:relative;width:min(340px,70vw);aspect-ratio:1;margin-inline:auto;display:grid;place-items:center}
.n-drop i{position:absolute;inset:auto;border-radius:50%;border:2px solid rgb(127 226 246/.45);width:40%;aspect-ratio:1;bottom:6%;animation:ripple 3.6s ease-out infinite}
.n-drop i:nth-child(2){animation-delay:1.2s}.n-drop i:nth-child(3){animation-delay:2.4s}
.n-drop svg{position:relative;width:62%;filter:drop-shadow(0 24px 40px rgb(0 0 0/.3));animation:bob 4s ease-in-out infinite}
@keyframes ripple{0%{transform:scale(.6) scaleY(.35);opacity:.9}100%{transform:scale(2.2) scaleY(.35);opacity:0}}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.n-wave{position:absolute;inset:auto 0 -1px;height:80px;z-index:0}
.n-wave svg{width:100%;height:100%;display:block}
@media (prefers-reduced-motion:reduce){.n-drop i,.n-drop svg{animation:none}}

/* RO stages */
.n-hd{text-align:center;margin-bottom:22px}
.n-hd h2{font-size:clamp(24px,3.4vw,34px);color:var(--ocean)}
.n-hd p{color:var(--muted);max-width:620px;margin:4px auto 0}
.n-stages{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;counter-reset:st}
@media (min-width:760px){.n-stages{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (min-width:1100px){.n-stages{grid-template-columns:repeat(6,minmax(0,1fr))}}
.n-stage{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;padding:20px 12px 16px;border-radius:20px;background:#fff;border:1px solid var(--line);text-align:center;text-decoration:none}
.n-stage__n{position:absolute;top:10px;inset-inline-start:12px;width:26px;height:26px;border-radius:50%;background:var(--aqua-l);color:var(--ocean);font-weight:800;font-size:13px;display:grid;place-items:center}
.n-stage__c{width:44px;height:96px;border-radius:12px;position:relative;box-shadow:inset 0 0 0 2px rgb(6 58 92/.15)}
.n-stage__c::after{content:"";position:absolute;inset:auto 8px 8px;height:30%;border-radius:6px;background:rgb(255 255 255/.45)}
.n-stage b{font-size:15px;color:var(--ocean)}
.n-stage small{color:var(--muted);font-size:12.5px;line-height:1.7}
.n-stage:hover{box-shadow:var(--shadow)}

.n-cats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
@media (min-width:760px){.n-cats{grid-template-columns:repeat(4,minmax(0,1fr))}}
.n-cat{display:flex;align-items:center;gap:12px;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line);text-decoration:none}
.n-cat__ic{width:52px;height:52px;flex-shrink:0;border-radius:16px;display:grid;place-items:center;background:var(--aqua-l);color:var(--ocean)}
.n-cat b{display:block;font-size:15px}
.n-cat small{color:var(--muted)}
.n-cat:hover{border-color:var(--aqua)}

.n-svc{border-radius:22px;overflow:hidden;border:1px solid var(--line);background:#fff}
.n-svc__hd{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:18px 20px;background:var(--ocean);color:#fff}
.n-svc__hd h2{font-size:clamp(20px,2.6vw,26px);color:#fff}
.n-svc__row{display:flex;justify-content:space-between;gap:12px;padding:12px 20px;border-bottom:1px solid var(--line);text-decoration:none}
.n-svc__row:last-child{border-bottom:0}
.n-svc__row b{white-space:nowrap;color:#0b7fa0}
.n-svc__row:hover span{color:var(--ocean);text-decoration:underline}

.n-contact{display:grid;gap:20px;align-items:center;padding:clamp(22px,4vw,40px);border-radius:26px;background:linear-gradient(140deg,#0a5a85,#063a5c);color:#e6f7fc}
@media (min-width:860px){.n-contact{grid-template-columns:1.2fr 1fr}}
.n-contact h2{color:#fff;font-size:clamp(22px,3vw,32px)}
.n-contact p{color:#c3e4ef}
.n-phones{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.n-phones a{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;border-radius:14px;background:rgb(255 255 255/.10);border:1px solid rgb(255 255 255/.18);color:#fff;text-decoration:none;font-weight:700;min-height:52px}
.n-phones a:first-child{grid-column:1/-1;background:var(--aqua);border-color:var(--aqua)}
.n-faq details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:4px 18px;margin-bottom:10px}
.n-faq summary{cursor:pointer;font-weight:700;min-height:52px;display:flex;align-items:center}
.n-faq p{color:var(--muted);padding-bottom:12px}