/* ========== Deep-Blue Industrial Color System ========== */
:root{
  /* core deep navy */
  --primary:#0E2A47;          /* deep navy — main brand */
  --primary-dark:#061A2E;     /* darkest navy — footer / deep sections */
  --primary-deep:#0A1E36;     /* hero stage navy */
  --steel:#1F4566;            /* steel blue — hover / secondary */
  --steel-2:#2A5677;          /* mid steel */
  --ice:#5DA9D6;              /* ice cyan accent — links / icons */
  --ice-strong:#3F8FBE;       /* deeper cyan — active states */
  --silver:#B8C5D1;           /* stainless steel silver */
  --silver-2:#9AAAB9;         /* darker silver */

  /* surfaces */
  --dark:#0E1B2A;             /* headings on light */
  --text:#1A2A3C;             /* body text */
  --muted:#5A6A7C;            /* secondary text */
  --line:#D5DEE7;             /* borders */
  --line-2:#E5ECF2;
  --bg:#F2F6F9;               /* light section bg */
  --white:#FFFFFF;

  /* radii / shadow */
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 14px 40px rgba(10,30,54,.10);
  --shadow-lg:0 22px 60px rgba(10,30,54,.18);
  --shadow-inset:inset 0 0 0 1px rgba(184,197,209,.35);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,Arial,Helvetica,sans-serif;color:var(--text);background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button,input,textarea,select{font:inherit}

.container{width:min(1180px,calc(100% - 40px));margin:auto}

.section{padding:90px 0;position:relative}
.section-light{background:var(--bg)}
.section-dark{background:linear-gradient(180deg,var(--primary-deep),var(--primary));color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:#c2d2e0}

.section-header{max-width:780px;margin:0 auto 50px;text-align:center}

.eyebrow{display:inline-block;margin-bottom:14px;font-size:12px;font-weight:700;letter-spacing:2.2px;text-transform:uppercase;color:var(--ice-strong)}
.eyebrow-line{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:14px;font-size:12px;font-weight:700;letter-spacing:2.2px;text-transform:uppercase;color:var(--ice-strong)}
.eyebrow-line::before,.eyebrow-line::after{content:"";width:34px;height:1px;background:linear-gradient(90deg,transparent,var(--silver),transparent)}

h1,h2,h3,h4{margin-top:0;color:var(--dark);line-height:1.18;letter-spacing:-.4px}
h1{font-size:clamp(38px,5vw,64px);letter-spacing:-1.6px;margin-bottom:22px;font-weight:800}
h2{font-size:clamp(28px,3.6vw,42px);letter-spacing:-.6px;margin-bottom:18px;font-weight:800}
h3{font-size:20px;margin-bottom:10px;font-weight:700}
p{margin-top:0}

.section-header p{color:var(--muted);font-size:17px;margin-bottom:0;line-height:1.7}

/* ========== Buttons ========== */
.btn-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 26px;border-radius:8px;font-size:15px;font-weight:700;letter-spacing:.2px;transition:.25s;border:1px solid transparent;cursor:pointer;gap:8px}
.btn-primary{color:#fff;background:linear-gradient(180deg,var(--ice-strong),#2F7BAA);box-shadow:0 10px 24px rgba(63,143,190,.25)}
.btn-primary:hover{background:linear-gradient(180deg,#357ea9,var(--ice-strong));transform:translateY(-2px);box-shadow:0 14px 28px rgba(63,143,190,.35)}
.btn-outline{border-color:var(--primary);color:var(--primary);background:#fff}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-ghost{color:#fff;border:1px solid rgba(255,255,255,.35);background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#fff}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(0,0,0,.18)}

/* ========== Top Bar ========== */
.top-bar{background:var(--primary-dark);color:#cfd9e3;font-size:13px;border-bottom:1px solid rgba(184,197,209,.12)}
.top-bar-inner{min-height:38px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.top-bar a{color:#cfd9e3}.top-bar a:hover{color:#fff}
.top-bar .tb-dot{margin:0 10px;color:var(--silver-2)}

/* ========== Navbar ========== */
.navbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line-2);backdrop-filter:blur(14px)}
.nav-inner{min-height:72px;display:flex;justify-content:space-between;align-items:center;gap:30px}
.logo{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:800;color:var(--dark);letter-spacing:-.3px}
.logo-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--steel));color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;box-shadow:inset 0 -2px 0 rgba(0,0,0,.15)}
.logo span{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:600;color:#3a4a5c}
.nav-links a{position:relative;color:#3a4a5c;transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.nav-links a.active{color:var(--primary)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-26px;height:2px;background:var(--ice)}
.nav-mobile-btn{display:none;border:0;background:transparent;font-size:26px;cursor:pointer;color:var(--primary);padding:6px 10px;border-radius:6px}
.nav-mobile-btn:hover{background:var(--bg)}

.mobile-menu{display:none;background:#fff;border-bottom:1px solid var(--line-2);padding:14px 0}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:12px 0;color:var(--text);font-weight:600;border-bottom:1px solid var(--line-2)}
.mobile-menu a:last-child{border-bottom:0;color:var(--primary)}

/* ========== Hero ========== */
.hero{position:relative;overflow:hidden;padding:90px 0 110px;background:
  radial-gradient(900px 600px at 85% -10%,rgba(93,169,214,.18),transparent 60%),
  radial-gradient(700px 500px at 0% 100%,rgba(31,69,102,.35),transparent 60%),
  linear-gradient(135deg,var(--primary-deep),#0c2440 60%,#112e4b);
color:#e7eef5}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(184,197,209,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(184,197,209,.06) 1px,transparent 1px);
  background-size:42px 42px;opacity:.7}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:90px;background:linear-gradient(180deg,transparent,#fff);pointer-events:none}

.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:.95fr 1.05fr;align-items:center;gap:50px}
.hero h1{color:#fff;font-weight:800}
.hero .eyebrow{color:var(--ice);background:rgba(93,169,214,.12);padding:6px 12px;border-radius:99px;border:1px solid rgba(93,169,214,.3)}
.hero-subtitle{font-size:18px;color:#bccbd9;margin-bottom:26px;line-height:1.7;max-width:560px}

.hero-points{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 22px;margin:30px 0 36px}
.hero-point{display:flex;align-items:center;gap:12px;font-size:14px;font-weight:600;color:#dfe7f0}
.hero-point:before{content:"✓";flex:0 0 auto;width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#fff;background:linear-gradient(135deg,var(--ice),var(--ice-strong));font-size:12px;box-shadow:0 4px 12px rgba(93,169,214,.4)}

.hero-image-wrap{position:relative;min-height:460px;display:flex;align-items:center;justify-content:center}
.hero-image-wrap::before{content:"";position:absolute;width:480px;height:480px;max-width:90%;max-height:90%;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.14) 0%,rgba(255,255,255,.04) 50%,transparent 70%);
  box-shadow:0 60px 120px rgba(0,0,0,.35),inset 0 0 0 1px rgba(184,197,209,.18)}
.hero-image-wrap::after{content:"";position:absolute;width:420px;height:420px;max-width:80%;max-height:80%;border-radius:50%;
  background:linear-gradient(135deg,rgba(93,169,214,.08),transparent 60%);border:1px solid rgba(184,197,209,.12)}
.hero-machine{position:relative;z-index:2;width:100%;max-height:580px;object-fit:contain;filter:drop-shadow(0 40px 35px rgba(0,0,0,.45))}

.hero-badge{position:absolute;z-index:3;right:6%;bottom:8%;background:rgba(255,255,255,.96);border-radius:14px;padding:14px 18px;box-shadow:0 18px 40px rgba(0,0,0,.25);border:1px solid var(--line);min-width:140px}
.hero-badge strong{display:block;color:var(--primary);font-size:24px;line-height:1.1}
.hero-badge span{color:var(--muted);font-size:12px;margin-top:4px;display:block}
.hero-badge-2{position:absolute;z-index:3;left:4%;top:10%;background:rgba(14,26,42,.92);color:#fff;border-radius:14px;padding:14px 18px;box-shadow:0 18px 40px rgba(0,0,0,.3);border:1px solid rgba(184,197,209,.2)}
.hero-badge-2 strong{display:block;color:var(--ice);font-size:18px}
.hero-badge-2 span{color:#b6c5d4;font-size:11px;margin-top:4px;display:block;letter-spacing:1px;text-transform:uppercase}

/* ========== Stats ========== */
.stats{position:relative;z-index:3;margin-top:-50px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);overflow:hidden}
.stat{padding:26px 22px;text-align:center;border-right:1px solid var(--line);position:relative}
.stat:last-child{border-right:none}
.stat strong{display:block;color:var(--primary);font-size:26px;letter-spacing:-.5px}
.stat span{font-size:13px;color:var(--muted);margin-top:4px;display:block}

/* ========== Trust Bar ========== */
.trust-bar{padding:34px 0;background:var(--bg);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;align-items:center}
.trust-item{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px;font-weight:600}
.trust-item .ti-icon{width:38px;height:38px;border-radius:10px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--ice-strong);flex:0 0 auto}
.trust-item strong{display:block;color:var(--dark);font-size:14px}

/* ========== Overview ========== */
.overview-grid,.application-layout,.custom-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.media-card{position:relative;background:linear-gradient(145deg,#eef4f9,#fff);border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;min-height:420px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.media-card::after{content:"";position:absolute;inset:auto -30% -40% auto;width:60%;height:60%;background:radial-gradient(circle,rgba(93,169,214,.18),transparent 70%);pointer-events:none}
.media-card img{max-height:430px;object-fit:contain;position:relative;z-index:1;filter:drop-shadow(0 22px 22px rgba(14,26,42,.18))}

.feature-list{display:grid;gap:16px;margin-top:30px}
.feature-item{display:flex;gap:14px;align-items:flex-start;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:12px;transition:.2s}
.feature-item:hover{border-color:var(--ice);box-shadow:var(--shadow);transform:translateY(-2px)}
.feature-icon{flex:0 0 auto;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--steel));color:#fff;font-weight:800;box-shadow:0 6px 16px rgba(14,42,71,.18)}
.feature-item h3{font-size:16px;margin-bottom:4px}
.feature-item p{margin:0;font-size:14px;color:var(--muted)}

/* ========== Process ========== */
.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.process-card{position:relative;padding:30px 28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;transition:.25s}
.process-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--ice)}
.process-number{position:absolute;right:18px;top:8px;font-size:64px;line-height:1;font-weight:800;color:rgba(14,42,71,.05);letter-spacing:-2px}
.process-icon{width:46px;height:46px;margin-bottom:18px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--steel));color:#fff;font-weight:800;box-shadow:0 8px 18px rgba(14,42,71,.18)}
.process-card h3{font-size:18px;margin-bottom:8px}
.process-card p{color:var(--muted);margin-bottom:0;font-size:14px;line-height:1.7}

/* ========== Application ========== */
.application-visual{position:relative;min-height:460px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-lg);background:linear-gradient(145deg,#eaf2f7,#fff);border:1px solid var(--line);overflow:hidden}
.application-visual::before{content:"";position:absolute;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(93,169,214,.2),transparent 70%);top:-100px;right:-100px}
.application-visual::after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(31,69,102,.15),transparent 70%);bottom:-80px;left:-80px}
.gel-image{position:absolute;width:50%;left:8%;top:8%;transform:rotate(-8deg);filter:drop-shadow(0 24px 22px rgba(14,26,42,.18));z-index:2}
.sachet-image{position:absolute;width:42%;right:7%;bottom:4%;transform:rotate(7deg);filter:drop-shadow(0 20px 22px rgba(40,50,60,.18));z-index:2}
.application-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:30px}
.application-card{padding:22px;border:1px solid var(--line);border-radius:12px;background:#fff;transition:.2s}
.application-card:hover{border-color:var(--ice);transform:translateY(-2px);box-shadow:var(--shadow)}
.application-card h3{font-size:17px;margin-bottom:6px}
.application-card p{color:var(--muted);margin:0;font-size:14px}

/* ========== Features Grid ========== */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-card{padding:26px 24px;border-radius:14px;border:1px solid var(--line);background:#fff;transition:.25s;position:relative;overflow:hidden}
.feature-card::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(93,169,214,.04),transparent 50%);opacity:0;transition:.25s}
.feature-card:hover{border-color:var(--ice);box-shadow:var(--shadow);transform:translateY(-3px)}
.feature-card:hover::before{opacity:1}
.feature-card-icon{width:46px;height:46px;border-radius:12px;margin-bottom:16px;background:linear-gradient(135deg,var(--primary),var(--steel));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;box-shadow:0 8px 18px rgba(14,42,71,.16);position:relative;z-index:1}
.feature-card h3{font-size:16px;margin-bottom:6px;position:relative;z-index:1}
.feature-card p{color:var(--muted);margin:0;font-size:14px;position:relative;z-index:1}

/* ========== Viscosity Box (dark) ========== */
.viscosity-box{display:grid;grid-template-columns:1fr 1fr;background:linear-gradient(135deg,#0a1d33,#112e4b);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.viscosity-box::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(184,197,209,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(184,197,209,.05) 1px,transparent 1px);background-size:30px 30px;pointer-events:none}
.viscosity-content{padding:60px;position:relative;z-index:1}
.viscosity-content h2{color:#fff}
.viscosity-content p{color:#bccbd9}
.viscosity-content .eyebrow{color:var(--ice)}
.dark-list{list-style:none;padding:0;margin:30px 0 0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px 18px;color:#dfe7f0;font-weight:600;font-size:14px}
.dark-list li{display:flex;align-items:center;gap:8px}
.dark-list li::before{content:"✓";color:var(--ice);font-weight:bold;width:18px;height:18px;border-radius:50%;background:rgba(93,169,214,.15);display:inline-flex;align-items:center;justify-content:center;font-size:11px;flex:0 0 auto}
.viscosity-visual{position:relative;min-height:420px;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at center,rgba(93,169,214,.25),transparent 60%)}
.viscosity-visual img{width:72%;max-height:380px;object-fit:contain;filter:drop-shadow(0 30px 25px rgba(0,0,0,.4));position:relative;z-index:1}

/* ========== Parameter Table ========== */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);background:#fff}
.parameter-table{width:100%;border-collapse:collapse;min-width:760px}
.parameter-table th,.parameter-table td{padding:17px 22px;text-align:left;border-bottom:1px solid var(--line-2)}
.parameter-table tr:last-child th,.parameter-table tr:last-child td{border-bottom:0}
.parameter-table th{width:34%;color:var(--dark);background:#f7fafc;font-size:14px;font-weight:700}
.parameter-table td{font-size:14px;color:#5b6874}
.parameter-table tr:hover{background:#fafcfd}
.parameter-note{margin-top:18px;padding:14px 18px;border-radius:10px;color:#576877;background:#eaf2f8;border-left:3px solid var(--ice);font-size:13px}

/* ========== Options ========== */
.options-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.option-card{min-height:130px;text-align:center;padding:22px 12px;background:#fff;border:1px solid var(--line);border-radius:13px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;transition:.2s;font-weight:600;color:var(--dark);font-size:14px}
.option-card:hover{border-color:var(--ice);transform:translateY(-3px);box-shadow:var(--shadow)}
.option-icon{width:42px;height:42px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--bg),#fff);color:var(--primary);font-weight:800;border:1px solid var(--line)}

/* ========== Samples ========== */
.samples-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px}
.sample-card{padding:34px;min-height:480px;border-radius:var(--radius-lg);border:1px solid var(--line);background:linear-gradient(145deg,#fff,#f0f5f9);display:flex;flex-direction:column;transition:.2s}
.sample-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.sample-card p{color:var(--muted)}
.sample-image-wrap{flex:1;display:flex;justify-content:center;align-items:center;margin-top:24px}
.sample-image-wrap img{max-height:320px;width:auto;object-fit:contain;filter:drop-shadow(0 22px 22px rgba(14,26,42,.18))}

/* ========== Custom Section ========== */
.custom-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:28px}
.custom-list-item{padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:10px;font-size:13px;font-weight:600;color:var(--text);display:flex;align-items:center;gap:10px}
.custom-list-item::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ice);flex:0 0 auto}
.sample-box{padding:34px;border-radius:var(--radius-lg);border:1px solid #cfe0ec;background:linear-gradient(145deg,#edf6fc,#fff)}
.sample-box ul{list-style:none;padding:0;margin:18px 0}
.sample-box li{padding:8px 0;color:var(--text);font-size:14px;display:flex;align-items:center;gap:10px;border-bottom:1px dashed var(--line-2)}
.sample-box li:last-child{border-bottom:0}
.sample-box li::before{content:"→";color:var(--ice-strong);font-weight:bold}

/* ========== FAQ ========== */
.faq-wrap{max-width:920px;margin:auto;background:#fff;border-radius:var(--radius-lg);border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden}
.faq-item{border-bottom:1px solid var(--line-2)}
.faq-item:last-child{border-bottom:0}
.faq-question{width:100%;border:none;background:transparent;color:var(--dark);padding:22px 26px;font-size:16px;font-weight:700;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;transition:.2s}
.faq-question:hover{background:#fafcfd;color:var(--primary)}
.faq-question span:last-child{width:28px;height:28px;border-radius:50%;background:var(--bg);color:var(--primary);font-size:18px;display:inline-flex;align-items:center;justify-content:center;transition:.25s;flex:0 0 auto}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s}
.faq-answer-inner{padding:0 26px 22px;color:var(--muted);font-size:14px;line-height:1.7}
.faq-item.active .faq-answer{max-height:400px}
.faq-item.active .faq-question{color:var(--primary)}
.faq-item.active .faq-question span:last-child{background:var(--primary);color:#fff;transform:rotate(45deg)}

/* ========== CTA Section ========== */
.cta-section{padding:90px 0;background:
  radial-gradient(800px 500px at 80% 20%,rgba(93,169,214,.2),transparent 60%),
  linear-gradient(135deg,var(--primary-dark),var(--primary) 60%,var(--steel));
  color:#fff;position:relative;overflow:hidden}
.cta-section::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(184,197,209,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(184,197,209,.05) 1px,transparent 1px);
  background-size:42px 42px}
.cta-grid{position:relative;z-index:1;display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}
.cta-copy h2{color:#fff;font-size:40px}
.cta-copy p{color:#c8d6e3}
.cta-points{display:grid;gap:12px;margin-top:26px;color:#dfe7f0;font-size:14px}
.cta-points span{display:flex;align-items:center;gap:10px}
.cta-points span::before{content:"✓";width:22px;height:22px;border-radius:50%;background:rgba(93,169,214,.2);color:var(--ice);display:inline-flex;align-items:center;justify-content:center;font-size:11px;flex:0 0 auto}

.cta-form{background:#fff;border-radius:var(--radius-lg);padding:32px;color:var(--dark);box-shadow:0 30px 60px rgba(0,0,0,.3);border:1px solid rgba(255,255,255,.08)}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.form-group{display:flex;flex-direction:column;gap:7px}
.form-group.full{grid-column:1/-1}
.form-group label{font-size:13px;font-weight:700;color:#465563}
.form-group label .req{color:#d8556a;margin-left:2px}
.form-group input,.form-group select,.form-group textarea{width:100%;border:1px solid #d8e1e7;background:#fafcfd;border-radius:8px;padding:13px 14px;outline:none;color:var(--dark);transition:.2s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--ice);background:#fff;box-shadow:0 0 0 4px rgba(93,169,214,.12)}
.form-group input.invalid,.form-group select.invalid,.form-group textarea.invalid{border-color:#d8556a;background:#fff5f6;box-shadow:0 0 0 4px rgba(216,85,106,.12)}
.form-group textarea{min-height:120px;resize:vertical}
.form-hint{font-size:12px;color:var(--muted);margin-top:-2px}
.form-submit{margin-top:22px}
.form-submit .btn{width:100%;border:none;min-height:54px}
.form-note{font-size:12px;color:var(--muted);margin-top:14px;text-align:center}
.form-ok{display:none;background:#eaf6ee;border:1px solid #bfe3c8;color:#2d7a3d;padding:12px 14px;border-radius:8px;margin-bottom:14px;font-size:14px;font-weight:600}
.form-ok.show{display:block}

/* ========== Footer ========== */
footer{background:var(--primary-dark);color:#9aaab9;padding:40px 0;border-top:1px solid rgba(184,197,209,.08)}
.footer-inner{display:flex;justify-content:space-between;gap:25px;align-items:center;font-size:13px;flex-wrap:wrap}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:18px;color:#fff;font-weight:800;margin-bottom:6px}
.footer-logo .logo-mark{width:30px;height:30px;border-radius:8px}

/* ========== Floating elements ========== */
.back-to-top{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;border:0;box-shadow:0 12px 28px rgba(14,42,71,.35);opacity:0;visibility:hidden;transform:translateY(20px);transition:.3s}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--steel)}

.floating-cta{position:fixed;right:24px;bottom:84px;background:#25d366;color:#fff;padding:14px 18px;border-radius:99px;font-weight:700;font-size:14px;display:flex;align-items:center;gap:10px;box-shadow:0 14px 30px rgba(37,211,102,.35);z-index:90;transition:.3s}
.floating-cta:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(37,211,102,.45)}

/* ========== Responsive ========== */
@media(max-width:860px){
  .hero-grid,.overview-grid,.application-layout,.viscosity-box,.custom-grid,.cta-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .options-grid{grid-template-columns:repeat(3,1fr)}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .hero-image-wrap{min-height:400px}
  .application-visual{min-height:380px}
  .viscosity-visual{min-height:340px}
  .viscosity-content{padding:45px}
  .hero h1{font-size:42px}
  .floating-cta{display:none}
}
@media(max-width:620px){
  .section{padding:65px 0}
  .nav-links{display:none}
  .nav-mobile-btn{display:block}
  .stats-grid,.process-grid,.samples-grid{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .form-group.full{grid-column:auto}
  .footer-inner{flex-direction:column;align-items:flex-start}
  .stats{margin-top:-30px}
  .hero-badge-2{display:none}
  .hero-image-wrap{min-height:340px}
  .application-visual{min-height:340px}
  .viscosity-visual{min-height:300px}
}
@media(max-width:480px){
  .container{width:min(100% - 28px,1180px)}
  .top-bar-inner{font-size:12px}
  .top-bar span:last-child{display:none}
  .hero{padding-top:60px;padding-bottom:80px}
  .hero-points,.application-grid,.features-grid,.custom-list,.dark-list,.stats-grid,.process-grid,.samples-grid,.options-grid,.trust-grid{grid-template-columns:1fr}
  .application-visual{min-height:300px}
  .viscosity-content{padding:35px 25px}
  .cta-form{padding:22px}
  .btn-row{flex-direction:column;align-items:stretch}
  .btn-row .btn{width:100%}
  h1{font-size:38px}
  h2{font-size:28px}
  .stats strong{font-size:22px}
  .back-to-top{right:18px;bottom:18px;width:42px;height:42px}
}