/* DS Networks — Corporate Site
 * Palette: navy #1a3050 / gold #c9a55f / light #f6f8fb
 */

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:'Pretendard','Noto Sans KR','Apple SD Gothic Neo',-apple-system,BlinkMacSystemFont,'Malgun Gothic',sans-serif;font-size:16px;line-height:1.65;color:#222;background:#fff;font-weight:400;letter-spacing:-0.01em}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:#1a3050}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4,h5{margin:0;font-weight:700;color:#1a3050;letter-spacing:-0.02em;line-height:1.3}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}

:root{
    --navy:#1a3050;
    --navy-dark:#0f1f38;
    --navy-light:#2c4870;
    --gold:#c9a55f;
    --gold-soft:#e8d4a3;
    --bg:#f6f8fb;
    --bg-dark:#eef2f8;
    --line:#e3e8ef;
    --text:#222;
    --muted:#666;
    --shadow-sm:0 2px 8px rgba(26,48,80,.06);
    --shadow-md:0 6px 24px rgba(26,48,80,.08);
    --shadow-lg:0 16px 48px rgba(26,48,80,.12);
}

.container{max-width:1240px;margin:0 auto;padding:0 24px}

/* ========== HEADER ========== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:all .3s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:44px;height:44px;object-fit:contain;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text .ko{font-size:17px;font-weight:700;color:var(--navy);letter-spacing:-0.03em}
.brand-text .en{font-size:11px;font-weight:600;color:var(--gold);letter-spacing:.1em}

.gnb{display:flex;gap:36px}
.gnb a{font-weight:600;font-size:15px;color:#333;padding:8px 0;position:relative}
.gnb a::after{content:'';position:absolute;left:50%;bottom:-2px;width:0;height:2px;background:var(--gold);transition:all .25s;transform:translateX(-50%)}
.gnb a:hover::after,.gnb a.active::after{width:100%}

.header-cta{display:flex;align-items:center;gap:14px}
.header-tel{font-weight:700;color:var(--navy);font-size:15px;display:flex;align-items:center;gap:6px}
.header-tel svg{width:16px;height:16px;color:var(--gold)}
.btn-inquiry{background:var(--navy);color:#fff !important;padding:10px 20px;border-radius:6px;font-size:14px;font-weight:600;transition:all .2s}
.btn-inquiry:hover{background:var(--navy-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}

.mobile-toggle{display:none;background:none;border:0;padding:8px;color:var(--navy)}
.mobile-toggle svg{width:26px;height:26px}

/* ========== HERO ========== */
.hero{position:relative;height:580px;margin-top:78px;overflow:hidden;display:flex;align-items:center;color:#fff}
.hero-bg{position:absolute;inset:0;z-index:1}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(15,31,56,.78) 0%,rgba(26,48,80,.55) 50%,rgba(26,48,80,.35) 100%)}
.hero-inner{position:relative;z-index:2;width:100%}
.hero-tag{display:inline-block;font-size:13px;letter-spacing:.18em;color:var(--gold-soft);font-weight:600;text-transform:uppercase;margin-bottom:18px;padding:6px 14px;border:1px solid rgba(232,212,163,.4);border-radius:30px}
.hero h1{font-size:48px;font-weight:800;color:#fff;line-height:1.25;margin-bottom:22px;letter-spacing:-0.03em}
.hero h1 strong{color:var(--gold-soft);font-weight:800}
.hero-desc{font-size:18px;color:rgba(255,255,255,.86);max-width:640px;line-height:1.75;margin-bottom:36px;font-weight:400}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:6px;font-weight:600;font-size:15px;transition:all .25s;border:0;cursor:pointer}
.btn-primary{background:var(--gold);color:var(--navy) !important}
.btn-primary:hover{background:#d4b06f;transform:translateY(-2px);box-shadow:0 12px 28px rgba(201,165,95,.4)}
.btn-outline{background:transparent;color:#fff !important;border:1.5px solid rgba(255,255,255,.5)}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff}

.hero-sub{height:380px}
.hero-sub h1{font-size:42px;margin-bottom:14px}
.hero-sub .hero-desc{font-size:17px;margin-bottom:0}

/* ========== SECTION COMMON ========== */
section{padding:96px 0}
.sec-head{text-align:center;margin-bottom:56px}
.sec-tag{display:inline-block;font-size:13px;letter-spacing:.18em;color:var(--gold);font-weight:700;text-transform:uppercase;margin-bottom:14px}
.sec-head h2{font-size:38px;margin-bottom:14px;letter-spacing:-0.03em}
.sec-head p{font-size:17px;color:var(--muted);max-width:680px;margin:0 auto}

/* ========== BUSINESS CARDS ========== */
.biz-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.biz-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.biz-card .img{position:relative;height:240px;overflow:hidden}
.biz-card .img img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.biz-card:hover .img img{transform:scale(1.05)}
.biz-card .img::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(15,31,56,.4) 100%)}
.biz-card .badge{position:absolute;top:18px;left:18px;background:var(--gold);color:var(--navy);padding:5px 12px;border-radius:4px;font-size:11px;font-weight:700;letter-spacing:.05em;z-index:2}
.biz-card .body{padding:28px;flex:1;display:flex;flex-direction:column}
.biz-card h3{font-size:22px;margin-bottom:12px;color:var(--navy)}
.biz-card .desc{color:var(--muted);font-size:15px;line-height:1.75;flex:1}
.biz-card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.biz-card .tag{font-size:12px;background:var(--bg);color:var(--navy);padding:4px 10px;border-radius:30px;font-weight:500}

/* ========== STRENGTHS ========== */
.strength-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.strength-card{text-align:center;padding:32px 18px;background:#fff;border-radius:14px;border:1px solid var(--line);transition:all .3s}
.strength-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:transparent}
.strength-card .ico{width:78px;height:78px;margin:0 auto 18px;background:var(--bg);border-radius:50%;display:flex;align-items:center;justify-content:center;overflow:hidden}
.strength-card .ico img{width:100%;height:100%;object-fit:cover}
.strength-card h4{font-size:16px;color:var(--navy);margin-bottom:10px}
.strength-card p{font-size:13.5px;color:var(--muted);line-height:1.7;margin:0}

/* ========== HISTORY TIMELINE ========== */
.timeline{position:relative;max-width:880px;margin:0 auto;padding:0 24px}
.timeline::before{content:'';position:absolute;left:140px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--gold) 0%,var(--gold-soft) 100%)}
.tl-item{display:flex;gap:48px;margin-bottom:40px;align-items:flex-start;position:relative}
.tl-item:last-child{margin-bottom:0}
.tl-year{flex:0 0 100px;text-align:right;font-size:28px;font-weight:800;color:var(--navy);letter-spacing:-0.02em;padding-top:4px}
.tl-dot{position:absolute;left:131px;top:14px;width:18px;height:18px;background:#fff;border:3px solid var(--gold);border-radius:50%;z-index:2}
.tl-body{flex:1;padding-left:56px}
.tl-body h4{font-size:17px;color:var(--navy);margin-bottom:6px}
.tl-body p{color:var(--muted);font-size:15px;margin:0}

/* ========== CEO / ABOUT ========== */
.about-overview{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-overview .text h2{font-size:36px;margin-bottom:24px}
.about-overview .text .lead{font-size:18px;color:var(--navy);margin-bottom:20px;font-weight:600;line-height:1.6}
.about-overview .text p{font-size:15.5px;color:#444;line-height:1.85}
.about-overview .image{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg)}
.about-overview .image img{width:100%;height:480px;object-fit:cover}

.fact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:56px}
.fact-row{display:contents}
.fact-key{background:var(--bg);padding:18px 24px;font-size:14px;font-weight:700;color:var(--navy);border-bottom:1px solid var(--line)}
.fact-val{padding:18px 24px;font-size:15px;color:#333;border-bottom:1px solid var(--line)}
.fact-row:nth-last-child(-n+2) .fact-key,.fact-row:nth-last-child(-n+2) .fact-val{border-bottom:0}

/* ========== PARTNERS ========== */
.partner-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.partner-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:36px 20px;text-align:center;transition:all .3s;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:160px}
.partner-card:hover{border-color:var(--gold);box-shadow:var(--shadow-md)}
.partner-card .name{font-size:16px;font-weight:700;color:var(--navy);margin-bottom:4px}
.partner-card .sub{font-size:13px;color:var(--muted)}

/* ========== CTA BAND ========== */
.cta-band{background:var(--navy);color:#fff;padding:72px 0;position:relative;overflow:hidden}
.cta-band::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 80% 50%,rgba(201,165,95,.18) 0%,transparent 60%)}
.cta-band .inner{display:flex;align-items:center;justify-content:space-between;gap:40px;position:relative;z-index:1}
.cta-band h3{color:#fff;font-size:30px;line-height:1.35;margin-bottom:10px}
.cta-band p{font-size:16px;color:rgba(255,255,255,.78);margin:0}
.cta-band .actions{display:flex;gap:12px;flex-shrink:0}

/* ========== CONTACT ========== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-info{background:var(--bg);padding:48px;border-radius:16px}
.contact-info h3{font-size:24px;margin-bottom:8px}
.contact-info .lead{color:var(--muted);font-size:15px;margin-bottom:32px}
.contact-list{display:flex;flex-direction:column;gap:20px}
.contact-list .item{display:flex;gap:16px;align-items:flex-start}
.contact-list .ico{flex:0 0 44px;height:44px;background:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--gold);box-shadow:var(--shadow-sm)}
.contact-list .ico svg{width:20px;height:20px}
.contact-list .label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;margin-bottom:4px;font-weight:600}
.contact-list .val{font-size:16px;color:var(--navy);font-weight:600}

.inquiry-form{background:#fff;padding:48px;border-radius:16px;border:1px solid var(--line)}
.inquiry-form h3{font-size:22px;margin-bottom:6px}
.inquiry-form .lead{color:var(--muted);font-size:14px;margin-bottom:28px}
.form-row{margin-bottom:18px}
.form-row.split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-row label{display:block;font-size:13px;font-weight:600;color:var(--navy);margin-bottom:8px}
.form-row label .req{color:#e85c5c;margin-left:3px}
.form-row input,.form-row select,.form-row textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;font-size:14.5px;font-family:inherit;background:#fff;color:#222;transition:all .2s}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:0;border-color:var(--navy);box-shadow:0 0 0 3px rgba(26,48,80,.08)}
.form-row textarea{resize:vertical;min-height:140px}
.form-agree{display:flex;align-items:center;gap:8px;margin-bottom:20px;font-size:13.5px;color:var(--muted)}
.form-agree input{width:18px;height:18px}
.form-submit{width:100%;background:var(--navy);color:#fff;border:0;padding:16px;border-radius:8px;font-size:15px;font-weight:600;transition:all .2s}
.form-submit:hover{background:var(--navy-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.form-msg{padding:14px 18px;border-radius:8px;margin-bottom:18px;font-size:14px}
.form-msg.success{background:#e8f5e8;color:#1f6b1f;border:1px solid #c9e8c9}
.form-msg.error{background:#fdecec;color:#a83232;border:1px solid #f5c9c9}

.map-wrap{margin-top:48px;border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.map-wrap iframe{width:100%;height:420px;display:block;border:0}

/* ========== FOOTER ========== */
.site-footer{background:var(--navy-dark);color:rgba(255,255,255,.7);padding:64px 0 28px;margin-top:0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand .name{color:#fff;font-size:22px;font-weight:800;letter-spacing:-0.02em}
.footer-brand .name span{color:var(--gold)}
.footer-logo-row{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-mark{width:48px;height:48px;object-fit:contain}
.footer-brand p{font-size:14px;line-height:1.75;margin:0}
.footer-col h5{color:#fff;font-size:14px;font-weight:700;margin-bottom:18px;letter-spacing:.05em;text-transform:uppercase}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.65);transition:color .2s}
.footer-col ul a:hover{color:var(--gold-soft)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;font-size:13px;color:rgba(255,255,255,.5);flex-wrap:wrap;gap:12px}
.footer-bottom .biz{display:flex;flex-wrap:wrap;gap:18px}

/* ========== ANIMATIONS ========== */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .8s ease,transform .8s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* ========== RESPONSIVE ========== */
@media(max-width:1024px){
    .gnb{gap:24px}
    .gnb a{font-size:14px}
    .header-tel{display:none}
    .biz-grid{gap:20px}
    .strength-grid{grid-template-columns:repeat(3,1fr)}
    .strength-card:nth-child(4),.strength-card:nth-child(5){grid-column:span 1}
    .partner-grid{grid-template-columns:repeat(3,1fr)}
    .footer-top{grid-template-columns:1fr 1fr;gap:36px}
}
@media(max-width:768px){
    .gnb,.header-cta .btn-inquiry{display:none}
    .mobile-toggle{display:flex}
    .header-inner{height:64px}
    .hero{height:480px;margin-top:64px}
    .hero h1{font-size:32px}
    .hero-desc{font-size:15px}
    .hero-sub{height:300px}
    .hero-sub h1{font-size:28px}
    section{padding:64px 0}
    .sec-head h2{font-size:28px}
    .biz-grid{grid-template-columns:1fr}
    .strength-grid{grid-template-columns:repeat(2,1fr)}
    .strength-card:nth-child(5){grid-column:span 2}
    .timeline::before{left:50px}
    .tl-year{flex:0 0 36px;font-size:18px;text-align:left}
    .tl-dot{left:46px;width:14px;height:14px}
    .tl-body{padding-left:32px}
    .about-overview{grid-template-columns:1fr;gap:36px}
    .about-overview .image img{height:300px}
    .fact-grid{grid-template-columns:1fr}
    .fact-row{display:contents}
    .partner-grid{grid-template-columns:repeat(2,1fr)}
    .cta-band .inner{flex-direction:column;text-align:center}
    .contact-grid{grid-template-columns:1fr;gap:28px}
    .contact-info,.inquiry-form{padding:32px 24px}
    .form-row.split{grid-template-columns:1fr}
    .footer-top{grid-template-columns:1fr;gap:28px}
    .footer-bottom{flex-direction:column;text-align:center}
}

/* Mobile slide menu */
.mobile-menu{position:fixed;top:0;right:-100%;width:80%;max-width:340px;height:100vh;background:#fff;z-index:200;padding:24px;transition:right .3s;box-shadow:-10px 0 40px rgba(0,0,0,.1);overflow-y:auto}
.mobile-menu.open{right:0}
.mobile-menu-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:199;opacity:0;pointer-events:none;transition:opacity .3s}
.mobile-menu-overlay.open{opacity:1;pointer-events:auto}
.mobile-menu .close{position:absolute;top:16px;right:16px;background:0;border:0;padding:8px}
.mobile-menu .close svg{width:24px;height:24px}
.mobile-menu .m-brand{display:flex;align-items:center;gap:10px;padding:8px 4px 18px;border-bottom:1px solid var(--line);margin-top:50px;margin-bottom:18px}
.mobile-menu .m-brand img{width:38px;height:38px;object-fit:contain}
.mobile-menu .m-brand span{display:flex;flex-direction:column;line-height:1.15}
.mobile-menu .m-brand strong{font-size:15px;color:var(--navy);font-weight:700;letter-spacing:-0.02em}
.mobile-menu .m-brand em{font-style:normal;font-size:11px;color:var(--gold);font-weight:600;letter-spacing:.1em}
.mobile-menu nav{display:flex;flex-direction:column;gap:4px}
.mobile-menu nav a{padding:14px 16px;font-size:16px;font-weight:600;color:var(--navy);border-radius:8px;transition:background .2s}
.mobile-menu nav a:hover,.mobile-menu nav a.active{background:var(--bg)}
.mobile-menu .m-cta{margin-top:24px;padding:20px 16px;background:var(--bg);border-radius:12px}
.mobile-menu .m-cta .tel{display:block;font-size:20px;font-weight:800;color:var(--navy);margin-bottom:8px}
.mobile-menu .m-cta .hours{font-size:13px;color:var(--muted);margin-bottom:14px}
.mobile-menu .m-cta a.btn{display:block;text-align:center;background:var(--navy);color:#fff !important;padding:12px;border-radius:8px;font-size:14px;font-weight:600}