:root{--bg:#0f172a;--panel:rgba(255,255,255,.05);--text:#fff;--muted:#cbd5e1;--line:rgba(255,255,255,.12);--accent:#22d3ee;--success:#34d399;--shadow:0 20px 60px rgba(0,0,0,.28);--radius:24px;--container:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Pretendard","Apple SD Gothic Neo","Malgun Gothic",sans-serif;background:radial-gradient(circle at top right,rgba(34,211,238,.12),transparent 22%),radial-gradient(circle at left center,rgba(59,130,246,.10),transparent 18%),var(--bg);color:var(--text);line-height:1.65}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(var(--container),calc(100% - 40px));margin:0 auto}.section{padding:90px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:36px;flex-wrap:wrap}.eyebrow{display:inline-block;margin-bottom:14px;color:var(--accent);font-size:14px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}h1,h2,h3,h4,p{margin:0}
h1{font-size:clamp(38px,6vw,68px);line-height:1.12;letter-spacing:-.03em}h2{font-size:clamp(30px,4vw,46px);line-height:1.2;letter-spacing:-.02em}h3{font-size:24px;line-height:1.3}.lead{font-size:18px;color:var(--muted)}.muted{color:var(--muted)}
.section-top-text{margin-top:22px}.section-sub-text{margin-top:18px}.section-head-text{max-width:620px}.contact-lead{margin-top:20px}.contact-tags{margin-top:24px}.contact-info{margin-bottom:16px;font-size:14px}.map-section{padding-top:0}.map-wrap{border-radius:24px;overflow:hidden;border:1px solid rgba(255,255,255,.08)}
.btn-group{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:0 24px;border-radius:16px;border:1px solid transparent;font-weight:700;transition:.25s ease;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--accent),#67e8f9);color:#082032;box-shadow:0 14px 32px rgba(34,211,238,.22)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(34,211,238,.30)}
.btn-secondary{border-color:var(--line);background:rgba(255,255,255,.03);color:#fff}.btn-secondary:hover{background:rgba(255,255,255,.08);transform:translateY(-2px)}
.site-header{position:sticky;top:0;z-index:50;background:rgba(15,23,42,.82);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.08);transition:background .25s ease,box-shadow .25s ease,border-color .25s ease}
.site-header.is-scrolled{background:rgba(15,23,42,.94);box-shadow:0 12px 32px rgba(0,0,0,.22);border-bottom-color:rgba(34,211,238,.12)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:82px;gap:20px;transition:min-height .25s ease,padding .25s ease}.site-header.is-scrolled .header-inner{min-height:68px}
.brand{display:flex;align-items:center;gap:14px}.brand img{width:clamp(150px,18vw,220px);max-width:100%;height:auto;object-fit:contain;display:block;transition:width .25s ease,transform .25s ease}.site-header.is-scrolled .brand img{width:clamp(136px,15vw,190px)}.brand-text{display:none}
.nav{display:flex;align-items:center;gap:28px;flex-wrap:wrap;margin-left:auto}.nav a{font-size:15px;color:#e2e8f0;transition:color .2s ease}.nav a:hover{color:var(--accent)}
.menu-toggle{display:none;width:48px;height:48px;border:1px solid rgba(255,255,255,.12);border-radius:14px;background:rgba(255,255,255,.04);align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;padding:0}
.menu-toggle span{width:18px;height:2px;background:#fff;border-radius:999px;transition:transform .25s ease,opacity .25s ease}.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu-toggle.active span:nth-child(2){opacity:0}.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.hero{padding:90px 0 80px;border-bottom:1px solid rgba(255,255,255,.08)}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:42px;align-items:center}.badge{display:inline-flex;align-items:center;gap:8px;min-height:38px;padding:0 16px;border:1px solid rgba(34,211,238,.25);border-radius:999px;background:rgba(34,211,238,.08);color:#b6f4ff;font-size:13px;font-weight:700;margin-bottom:18px}.hero h1 span{color:var(--accent);display:block}.hero-copy p{margin-top:22px;max-width:700px}
.hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}.metric{padding:18px;border-radius:18px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}.metric small{display:block;color:#94a3b8;font-size:12px;margin-bottom:6px}.metric strong{font-size:24px;font-weight:800}
.hero-card{position:relative;border-radius:30px;padding:22px;background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.03));border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow)}.hero-card::after{content:"SB = Smart Bridge";position:absolute;top:-14px;right:20px;padding:10px 14px;border-radius:999px;background:rgba(34,211,238,.10);border:1px solid rgba(34,211,238,.20);color:#c9fbff;font-size:12px;font-weight:700}
.dashboard{border-radius:24px;padding:22px;background:rgba(15,23,42,.92);border:1px solid rgba(255,255,255,.08)}.dashboard-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.dashboard-head small{color:#94a3b8;display:block;margin-bottom:4px}.status{padding:8px 12px;border-radius:999px;background:rgba(52,211,153,.12);color:#8ff3ca;font-size:12px;font-weight:700;border:1px solid rgba(52,211,153,.18)}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.stat-box,.process-box{border-radius:20px;padding:18px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}.stat-box span,.process-box span{display:block;font-size:12px;color:#94a3b8;margin-bottom:8px}.stat-box strong{font-size:34px;line-height:1;display:block;margin-bottom:8px}.good{color:var(--success)}.accent{color:var(--accent)}.process-box{margin-top:14px}
.process-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}.process-step{padding:16px 10px;border-radius:16px;background:rgba(15,23,42,.95);text-align:center;border:1px solid rgba(255,255,255,.06)}.process-step b{display:block;color:#64748b;font-size:11px;margin-bottom:8px;letter-spacing:.08em}
.logo-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.logo-box{min-height:74px;display:flex;align-items:center;justify-content:center;border-radius:20px;border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.03);font-weight:700;color:#e2e8f0}
.grid-two{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:start}.value-grid,.card-grid,.product-grid,.project-list,.footer-grid{display:grid;gap:18px}.value-grid{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:repeat(4,1fr)}.product-grid{grid-template-columns:repeat(3,1fr)}.project-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1.2fr .8fr .8fr}
.card,.value-card,.product-card,.project-card,.contact-card{border-radius:var(--radius);border:1px solid rgba(255,255,255,.08);background:var(--panel);box-shadow:var(--shadow)}.value-card,.card,.project-card,.contact-card{padding:26px}.value-card h3,.card h3,.product-card h3,.project-card h3{margin-bottom:10px}.value-card p,.card p,.product-card p,.project-card p{color:var(--muted)}
.light-section{background:rgba(255,255,255,.03);border-top:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08)}.link-more{display:inline-flex;align-items:center;gap:8px;margin-top:18px;color:var(--accent);font-weight:700;font-size:14px}
.product-card{overflow:hidden;transition:transform .25s ease,border-color .25s ease;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02))}.product-card:hover{transform:translateY(-6px);border-color:rgba(34,211,238,.22)}
.product-visual{height:220px;background-size:cover;background-position:center;border-bottom:1px solid rgba(255,255,255,.08);position:relative;overflow:hidden}.product-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.06),rgba(15,23,42,.48))}
.visual-panel{background-image:linear-gradient(135deg,rgba(34,211,238,.28),rgba(59,130,246,.18)),url('http://www.thesb.kr/img/PLC_CONTROL_PANEL.png')}
.visual-scada{background-image:linear-gradient(135deg,rgba(34,211,238,.24),rgba(59,130,246,.16)),url('http://www.thesb.kr/img/HMI_SCADA.png')}
.visual-inverter{background-image:linear-gradient(135deg,rgba(34,211,238,.22),rgba(59,130,246,.16)),url('http://www.thesb.kr/img/INVERTER_PANEL.png')}
.product-content{padding:24px}.tag-list{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.tag{padding:10px 14px;border-radius:999px;border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.04);font-size:14px;color:#e2e8f0}
.project-card{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}.project-meta{width:120px;height:84px;border-radius:22px;background-size:cover;background-position:center;border:1px solid rgba(255,255,255,.08);overflow:hidden}
.project-1{background-image:linear-gradient(135deg,rgba(34,211,238,.10),rgba(59,130,246,.10)),url('http://www.thesb.kr/img/sdi_sr.png')}
.project-2{background-image:linear-gradient(135deg,rgba(34,211,238,.10),rgba(59,130,246,.10)),url('http://www.thesb.kr/img/chemical_mixing.png')}
.project-3{background-image:linear-gradient(135deg,rgba(34,211,238,.10),rgba(59,130,246,.10)),url('http://www.thesb.kr/img/fems.png')}
.project-4{background-image:linear-gradient(135deg,rgba(34,211,238,.10),rgba(59,130,246,.10)),url('http://www.thesb.kr/img/sk_scrubber.png')}
.project-card small{display:inline-block;margin-bottom:8px;color:#64748b;letter-spacing:.14em;text-transform:uppercase;font-size:11px;font-weight:700}
.contact-wrap{border-radius:34px;padding:34px;background:linear-gradient(135deg,rgba(34,211,238,.10),rgba(15,23,42,.9));border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow)}.contact-grid{display:grid;grid-template-columns:1fr .95fr;gap:26px;align-items:center}.form-grid{display:grid;gap:14px}
.field{width:100%;min-height:54px;border-radius:16px;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.05);color:#fff;padding:0 16px;outline:none}textarea.field{min-height:130px;padding:16px;resize:vertical}.field::placeholder{color:#94a3b8}
.site-footer{padding:34px 0 40px;border-top:1px solid rgba(255,255,255,.08);background:rgba(0,0,0,.10)}.footer-title{font-size:18px;font-weight:800;margin-bottom:12px}.footer-list{display:grid;gap:8px;color:var(--muted);font-size:15px}.copyright{margin-top:24px;padding-top:18px;border-top:1px solid rgba(255,255,255,.08);color:#94a3b8;font-size:14px}
@media (min-width:1024px){.nav{display:flex!important;position:static;background:none;box-shadow:none}.menu-toggle{display:none!important}}
@media (max-width:1080px){.hero-grid,.grid-two,.contact-grid,.footer-grid,.card-grid,.product-grid{grid-template-columns:1fr 1fr}.hero-grid{grid-template-columns:1fr}.grid-two,.contact-grid,.footer-grid{grid-template-columns:1fr}.card-grid{grid-template-columns:repeat(2,1fr)}.product-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:1023px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:768px){.hero-grid{grid-template-columns:1fr}.hero h1{font-size:32px}.section{padding:60px 0}.container{width:calc(100% - 24px)}.btn{width:100%;font-size:16px}.card-grid,.product-grid,.hero-metrics{grid-template-columns:1fr}.nav{position:fixed;top:0;right:-100%;width:80%;height:100vh;background:#0f172a;flex-direction:column;padding:80px 20px;transition:right .3s ease}.nav.open{right:0}}
@media (max-width:760px){.brand img{width:150px}.site-header.is-scrolled .brand img{width:138px}.section{padding:72px 0}.header-inner{padding:12px 0;align-items:center;min-height:72px}.menu-toggle{display:inline-flex;margin-left:auto}.nav{position:fixed;top:0;right:-100%;width:80%;height:100vh;display:flex;flex-direction:column;align-items:stretch;gap:0;margin-left:0;padding:80px 20px;border-radius:0;background:rgba(15,23,42,.98);border-left:1px solid rgba(255,255,255,.10);box-shadow:-20px 0 50px rgba(0,0,0,.28)}.nav.open{right:0}.nav a{display:block;padding:14px 12px;border-radius:14px}.nav a:hover{background:rgba(255,255,255,.05)}.hero{padding-top:70px}.logo-strip,.value-grid,.stat-grid,.process-steps,.card-grid,.product-grid{grid-template-columns:1fr}.project-card{grid-template-columns:1fr}.project-meta{width:100%;height:16px;border-radius:999px}.hero-card::after{position:static;display:inline-flex;margin-bottom:14px}}