/* ========================================
   Viin . KANGHE - v3
   Theme: Gold #d4a574 | White #fff | Light
   Breakpoints: 1200px / 1024px / 768px / 480px
   ======================================== */

:root {
  --bg-deep: #ffffff;
  --bg-card: #f5f5f5;
  --bg-section: #ffffff;
  --bg-alt: #fafafa;
  --border: rgba(0,0,0,.06);
  --border-hover: rgba(0,0,0,.12);
  --accent: #d4a574;
  --accent-hover: #c8966a;
  --accent-dim: rgba(212,165,116,.1);
  --text: #222222;
  --text-secondary: #555555;
  --text-tertiary: #888888;
  --radius: 0;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg-deep);color:var(--text-secondary);line-height:1.8;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#000}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:480px){.container{padding:0 16px}}

/* LOADER */
#loader{position:fixed;top:0;left:0;width:100%;height:100%;background:#000;display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:10000;transition:opacity .5s,visibility .5s}
#loader.hidden{opacity:0;visibility:hidden}
.loader-ring{width:60px;height:60px;border:2px solid rgba(212,165,116,.15);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loader-text{color:var(--accent);margin-top:16px;font-size:.8rem;letter-spacing:4px;font-weight:300}

/* HEADER */
.header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(0,0,0,.88);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.06);height:64px}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-img{height:48px;width:auto}
.team-avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.logo-text{display:inline-flex;align-items:center;font-size:1.2rem;font-weight:400;letter-spacing:3px;color:#fff}
.logo-divider{display:none}
.logo-sub{font-weight:300;font-size:.8rem;color:rgba(255,255,255,.5);letter-spacing:2px;margin-left:4px}

.nav{display:flex;align-items:center;gap:0}
.nav>a{display:block;padding:0 16px;color:var(--text-secondary);font-size:.72rem;font-weight:600;letter-spacing:1.5px;line-height:64px;transition:color .3s;white-space:nowrap}
.nav>a:hover{color:var(--accent)}
.nav-dropdown{position:relative}
.dropdown-trigger{display:block;padding:0 16px;color:var(--text-secondary);font-size:.72rem;font-weight:600;letter-spacing:1.5px;line-height:64px;cursor:default;transition:color .3s;white-space:nowrap}
.dd-arrow{font-size:.55rem;margin-left:3px;transition:transform .3s}
.nav-dropdown:hover>.dropdown-trigger,.nav-dropdown:focus-within>.dropdown-trigger{color:var(--accent)}
.nav-dropdown:hover .dd-arrow{transform:rotate(180deg)}
.dropdown-panel{display:none;position:absolute;top:100%;left:50%;transform:translateX(-50%);background:#000;border:1px solid var(--border);padding:20px;z-index:300;min-width:580px;grid-template-columns:1fr 1fr 1fr;gap:0}
.nav-dropdown:hover .dropdown-panel,.nav-dropdown:focus-within .dropdown-panel{display:grid}
.dp-col{padding:0 16px}
.dp-col+.dp-col{border-left:1px solid var(--border)}
.dp-col-title{font-size:.6rem;font-weight:600;color:var(--text-tertiary);letter-spacing:2px;text-transform:uppercase;margin-bottom:12px;padding-bottom:6px;border-bottom:1px solid var(--border)}
.dp-item{display:flex;align-items:center;gap:10px;padding:7px 6px;color:var(--text-secondary);transition:all .2s;font-size:.78rem}
.dp-item:hover{background:var(--accent-dim);color:var(--accent)}
.dp-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0}
.dp-text{display:flex;flex-direction:column;gap:1px}
.dp-name{font-weight:500;color:#ccc}
.dp-desc{font-size:.62rem;color:var(--text-tertiary)}

.nav-toggle{display:none;width:34px;height:34px;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;justify-content:space-around}
.nav-toggle span{display:block;width:100%;height:1.5px;background:var(--text-secondary);transition:all .3s}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(3px,4px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(3px,-4px)}
.nav-overlay{display:none;position:fixed;top:64px;left:0;width:100%;height:calc(100vh - 64px);background:rgba(0,0,0,.5);z-index:998}
.nav-overlay.active{display:block}
@media(min-width:769px){.nav-overlay{display:none!important}}

/* TYPOGRAPHY */
.section{padding:90px 0}
.section-dark{background:#ffffff}
.section-header{text-align:center;margin-bottom:55px}
.section-badge{display:inline-block;font-size:.65rem;font-weight:600;letter-spacing:3px;color:var(--accent);margin-bottom:10px}
.section-title{font-size:2.2rem;font-weight:400;letter-spacing:5px;color:var(--text);margin-bottom:14px}
.section-divider{width:50px;height:2px;background:var(--accent);margin:0 auto 14px}
.section-subtitle{font-size:.82rem;color:var(--text-tertiary);max-width:560px;margin:0 auto;line-height:1.8}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 36px;font-size:.75rem;font-weight:600;letter-spacing:2px;border:none;cursor:pointer;transition:all .3s}
.btn-primary{background:var(--accent);color:#000}
.btn-primary:hover{background:var(--accent-hover);transform:scale(1.04)}
.btn-outline{background:transparent;color:#d4a574;border:1.5px solid #d4a574}
.btn-outline:hover{background:#d4a574;color:#000;border-color:#d4a574;transform:scale(1.04)}
.btn-block{width:100%}

/* HERO */
.hero{position:relative;height:79vh;min-height:550px;margin-top:64px;overflow:hidden;background:#000}
.hero-slider{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .9s ease;z-index:0}
.hero-slide.active{opacity:1;z-index:1}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,0,0,.7) 0%,rgba(0,0,0,.4) 100%);z-index:2}
.hero-content{position:absolute;top:50%;left:8%;transform:translateY(-50%);text-align:left;color:#fff;z-index:3;width:auto;max-width:680px}

.hero-title{font-size:2.8rem;font-weight:300;letter-spacing:6px;margin-bottom:12px;color:#fff;line-height:1.25}
.hero-highlight{display:block;font-weight:200;letter-spacing:10px;color:var(--accent);margin-top:6px}
.hero-subtitle{font-size:1.35rem;color:rgba(212,165,116,.75);letter-spacing:3px;margin-bottom:28px;font-weight:300}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:44px;height:44px;background:rgba(255,255,255,.04);border:1px solid var(--border);color:#fff;font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s;line-height:1}
.hero-arrow:hover{background:var(--accent);color:#000;border-color:var(--accent)}
.hero-arrow-prev{left:20px}
.hero-arrow-next{right:20px}
.hero-dots{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.35);cursor:pointer;transition:all .3s;border:none}
.hero-dot.active{width:24px;border-radius:3px;background:var(--accent)}

/* SERVICES */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--border);border-left:1px solid var(--border)}
.service-card{position:relative;padding:44px 36px;cursor:default;background:var(--bg-deep);border-right:1px solid var(--border);border-bottom:1px solid var(--border);transition:all .3s}
.service-card:hover{background:var(--bg-alt)}

.service-card-content{text-align:left;color:var(--text)}
.sc-icon{font-size:1.5rem;margin-bottom:16px;display:block}
.sc-title-group{margin-bottom:14px}
.sc-title-group h3{font-size:1.05rem;font-weight:600;letter-spacing:2px;color:var(--text);margin-bottom:4px}
.sc-title-group .sc-desc{font-size:.75rem;color:var(--text-tertiary);line-height:1.6}
.sc-features{list-style:none;padding:0;margin:12px 0 0;border-top:1px solid var(--border);padding-top:12px}
.sc-features li{font-size:.72rem;color:var(--text-secondary);padding:4px 0;position:relative;padding-left:14px;line-height:1.5}
.sc-features li::before{content:"—";position:absolute;left:0;color:var(--accent);opacity:.6}
.sc-badge{display:inline-block;padding:3px 14px;background:var(--accent);color:#000;font-size:.58rem;font-weight:700;letter-spacing:1px;margin-bottom:14px}
.sc-link{display:inline-block;margin-top:12px;color:var(--accent);font-size:.7rem;letter-spacing:1px;font-weight:500;transition:all .3s}
.sc-link:hover{opacity:.7}

/* ADVANTAGES */
.advantages-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.advantage-card{padding:44px 36px;background:var(--bg-alt);border-right:1px solid var(--border);border-bottom:1px solid var(--border);transition:all .3s;position:relative}
.advantage-card:nth-child(3n){border-right:none}
.advantage-card:nth-last-child(-n+3){border-bottom:none}
.advantage-card:hover{background:var(--bg-card)}
.ac-num{font-size:2rem;font-weight:200;color:var(--accent);margin-bottom:10px;letter-spacing:1px}
.advantage-card h3{font-size:.85rem;font-weight:600;letter-spacing:1px;color:var(--text);margin-bottom:8px}
.advantage-card p{font-size:.78rem;color:var(--text-tertiary);line-height:1.7}

/* CUSTOMER WALL */
.customer-wall{max-width:100%;margin:0 auto;display:flex;flex-direction:column;padding:0 48px}
.cw-category{display:flex;align-items:center;gap:32px;padding:24px 0;border-bottom:1px solid var(--border)}
.cw-category:last-child{border-bottom:none}
.cw-industry{flex-shrink:0;width:90px;font-size:.85rem;font-weight:600;letter-spacing:2px;color:var(--accent)}
.cw-logos{display:flex;flex-wrap:wrap;gap:10px}
.cw-logo{display:inline-block;padding:6px 20px;font-size:.78rem;color:var(--text-secondary);border:1px solid var(--border);transition:all .2s}
.cw-logo:hover{background:var(--accent-dim);color:var(--accent);border-color:rgba(212,165,116,.2)}

/* CASES */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.case-card{position:relative}
.case-image{position:relative;height:240px;overflow:hidden}
.case-image img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.case-card:hover .case-image img{transform:scale(1.06)}
.case-overlay{position:absolute;inset:0;background:rgba(0,0,0,.3);display:flex;align-items:center;justify-content:center;transition:background .3s}
.case-card:hover .case-overlay{background:rgba(0,0,0,.15)}
.case-tag{color:#fff;font-size:.7rem;letter-spacing:2px;font-weight:500;border-bottom:1px solid rgba(255,255,255,.3);padding-bottom:3px}
.case-list{padding:24px 20px;background:var(--bg-alt)}
.case-list h3{font-size:.82rem;font-weight:600;letter-spacing:1px;color:var(--text);margin-bottom:10px}
.case-list ul{list-style:none}
.case-list li{font-size:.75rem;color:var(--text-tertiary);padding:3px 0;position:relative;padding-left:12px}
.case-list li::before{content:"---";position:absolute;left:0;color:var(--accent);opacity:.5}

/* ABOUT */
.about-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-image{height:420px;overflow:hidden}
.about-image img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.about-image:hover img{transform:scale(1.04)}
.about-text h3{font-size:1.3rem;font-weight:500;letter-spacing:3px;color:var(--text);margin-bottom:16px}
.about-text p{font-size:.82rem;color:var(--text-tertiary);line-height:1.9;margin-bottom:12px}
.about-motto{color:var(--accent);font-size:.85rem;letter-spacing:3px;margin:18px 0;font-weight:500}
.about-stats{display:flex;gap:36px;margin-top:8px}
.stat-item{text-align:left}
.stat-num{font-size:1.8rem;font-weight:300;color:var(--accent);display:block;letter-spacing:1px}
.stat-label{font-size:.68rem;color:var(--text-tertiary);display:block;margin-top:1px;letter-spacing:1px}

/* TEAM */
.team-section{padding:70px 0 0}
.team-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.team-card{text-align:center;padding:36px 14px;border-right:1px solid var(--border);transition:all .3s}
.team-card:last-child{border-right:none}
.team-card:hover{background:var(--bg-alt)}
.team-avatar{width:195px;height:195px;border-radius:50%;overflow:hidden;margin:0 auto 16px}
.team-card h4{font-size:.82rem;font-weight:600;color:var(--text);letter-spacing:1px;margin-bottom:2px}
.team-role{font-size:.65rem;color:var(--accent);font-weight:500;display:block;margin-bottom:8px;letter-spacing:1px}
.team-card p{font-size:.7rem;color:var(--text-tertiary);line-height:1.6;max-width:180px;margin:0 auto}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--border)}
.contact-info{padding:36px}
.ci-item{display:flex;gap:12px;margin-bottom:18px}
.ci-item:last-child{margin-bottom:0}
.ci-icon{font-size:1rem;flex-shrink:0;margin-top:2px;opacity:.5}
.ci-label{font-size:.75rem;color:var(--text-tertiary);letter-spacing:1px;display:block}
.ci-value{font-size:1rem;color:var(--text);margin-top:1px}
.contact-form{padding:36px;border-left:1px solid var(--border)}
.contact-form h3{font-size:.82rem;font-weight:600;letter-spacing:2px;color:var(--text);margin-bottom:18px}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;padding:11px 14px;background:rgba(255,255,255,.02);border:1px solid var(--border);font-size:.8rem;color:var(--text);font-family:inherit;margin-bottom:12px;transition:border-color .3s}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:rgba(212,165,116,.3)}
.cf-inline{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:0}
.contact-form select option{background:#fff;color:#222}
.form-note{text-align:center;font-size:.65rem;color:var(--text-tertiary);margin-top:8px}

/* FOOTER */
.footer{border-top:1px solid var(--border);padding:44px 0 0;background:#fafafa}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:36px}
.footer-col h3{font-size:.85rem;font-weight:600;letter-spacing:2px;color:var(--text);margin-bottom:14px}
.footer-col h4{font-size:.7rem;font-weight:600;letter-spacing:1px;color:var(--text);margin-bottom:12px}
.footer-col p{font-size:.75rem;color:var(--text-tertiary);line-height:1.7}
.footer-motto{color:var(--accent)!important;margin-top:8px!important;font-size:.75rem!important}
.footer-col ul{list-style:none}
.footer-col ul li{font-size:.74rem;color:var(--text-tertiary);padding:3px 0;transition:color .3s}
.footer-col ul li:hover{color:var(--accent)}
.footer-bottom{background:var(--bg-card);padding:14px 0;text-align:center;font-size:.68rem;color:var(--text-tertiary)}
.footer-bottom p{opacity:.7}

/* INTERACTIONS */
.reveal{opacity:0;transform:translateY(20px);transition:all .6s cubic-bezier(.25,.46,.45,.94)}
.reveal.visible{opacity:1;transform:translateY(0)}
.header.scrolled{background:rgba(0,0,0,.97)}

/* PRODUCT LOGO (onecast / vocai) */
.product-logo-wrap{margin-bottom:10px}
.product-logo-img{max-width:200px;height:auto;margin:0 auto}
/* PRODUCT PAGES (shared) */
.product-hero{padding:140px 0 80px;text-align:center;background:var(--bg-section);border-bottom:1px solid var(--border)}
.product-badge{display:inline-block;font-size:.6rem;letter-spacing:3px;color:var(--accent);margin-bottom:12px;font-weight:600}
.product-hero h1{font-size:3rem;font-weight:300;letter-spacing:8px;color:#fff;margin-bottom:6px}
.product-hero-sub{font-size:1rem;color:var(--accent);letter-spacing:3px;margin-bottom:8px}
.product-hero-desc{font-size:.8rem;color:var(--text-tertiary);letter-spacing:1px;max-width:600px;margin:0 auto}
.product-features,.product-scenarios{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--border)}
.pf-card,.scenario-card{padding:36px 28px;border-right:1px solid var(--border);border-bottom:1px solid var(--border);transition:all .3s}
.pf-card:nth-child(3n),.scenario-card:nth-child(3n){border-right:none}
.pf-card:nth-last-child(-n+3),.scenario-card:nth-last-child(-n+3){border-bottom:none}
.pf-card:hover,.scenario-card:hover{background:var(--bg-alt)}
.pf-card h3,.scenario-card h3{font-size:.82rem;font-weight:600;letter-spacing:1px;color:var(--text);margin-bottom:6px}
.pf-card p,.scenario-card p{font-size:.75rem;color:var(--text-tertiary);line-height:1.7}
.product-footer-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:20px}

/* RESPONSIVE - 1024px */
@media(max-width:1024px){
  .hero-title{font-size:2.4rem;letter-spacing:5px}
  .hero-highlight{letter-spacing:8px}
  .section-title{font-size:1.6rem}
  .services-grid,.advantages-grid,.cases-grid{grid-template-columns:repeat(2,1fr)}
  .advantage-card:nth-child(2n){border-right:none}
  .advantage-card:nth-child(3n){border-right:1px solid var(--border)}
  .advantage-card:nth-last-child(-n+2){border-bottom:none}
  .advantage-card:nth-last-child(-n+3){border-bottom:1px solid var(--border)}
  .about-content{grid-template-columns:1fr;gap:40px}
  .about-image{height:300px}
  .team-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .product-features,.product-scenarios{grid-template-columns:repeat(2,1fr)}
  .pf-card:nth-child(3n),.scenario-card:nth-child(3n){border-right:1px solid var(--border)}
  .pf-card:nth-child(2n),.scenario-card:nth-child(2n){border-right:none}
}

/* RESPONSIVE - 768px */
@media(max-width:768px){
  .nav{display:block!important;position:fixed;top:64px;left:-100%;width:75%;min-width:260px;height:calc(100vh - 64px);background:rgba(0,0,0,.98);overflow-y:auto;z-index:999;transition:left .35s cubic-bezier(.4,0,.2,1);border-right:1px solid var(--border);padding:8px 0}
  .nav.open{left:0;display:block!important}
  .nav>a,.dropdown-trigger{line-height:48px;padding:0 20px}
  .nav-dropdown .dropdown-panel{display:none!important}
  .nav-dropdown.dropdown-open .dropdown-panel{display:grid!important;position:static;transform:none;min-width:auto;border:none;padding:8px 16px;background:rgba(255,255,255,.02)}
  .nav-toggle{display:flex}
  .hero-content{left:5%;width:90%;max-width:90%}
  .hero{height:66vh;min-height:500px}
  .hero-title{font-size:1.8rem;letter-spacing:4px}
  .hero-highlight{letter-spacing:6px;font-size:1.2rem}
  .hero-subtitle{font-size:1.1rem}
  .services-grid,.advantages-grid,.cases-grid,.about-content,.contact-grid{grid-template-columns:1fr}
  .advantage-card:nth-child(n){border-right:none}
  .advantage-card:nth-last-child(-n+1){border-bottom:none}
  .about-image{height:240px}
  .team-grid{grid-template-columns:repeat(3,1fr)}
  .contact-info,.contact-form{border:none;padding:24px}
  .contact-form{border-top:1px solid var(--border)}
  .product-features,.product-scenarios{grid-template-columns:1fr}
  .pf-card:nth-child(n),.scenario-card:nth-child(n){border-right:none}
  .case-card{border-bottom:1px solid var(--border)}
  .case-card:last-child{border-bottom:none}
}

/* RESPONSIVE - 480px */
@media(max-width:480px){
  .section{padding:50px 0}
  .section-header{margin-bottom:32px}
  .section-title{font-size:1.2rem;letter-spacing:3px}
  .hero-content{left:16px;right:16px;width:auto;max-width:100%}
  .hero{height:66vh;min-height:420px}
  .hero-title{font-size:1.4rem;letter-spacing:4px}
  .hero-subtitle{font-size:1rem;letter-spacing:1px}
  .hero-dots{bottom:20px}
  .hero-arrow{width:34px;height:34px;font-size:1.1rem}
  .hero-arrow-prev{left:8px}
  .hero-arrow-next{right:8px}
  .service-card{padding:28px 20px}
  .sc-icon{font-size:1.1rem}
  .sc-title-group h3{font-size:.82rem;letter-spacing:1px}
  .sc-title-group .sc-desc{font-size:.65rem}
  .sc-features li{font-size:.65rem}
  .team-grid{grid-template-columns:repeat(2,1fr)}
  .team-card{padding:20px 8px}
  .team-card p{display:none}
  .team-avatar{width:130px;height:130px}
  .about-text h3{font-size:1rem}
  .about-content{gap:24px}
  .about-image{height:200px}
  .about-stats{gap:20px}
  .stat-num{font-size:1.3rem}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer{padding:32px 0 0}
  .cf-inline{grid-template-columns:1fr}
  .btn{padding:10px 24px;font-size:.68rem;letter-spacing:1px}
  .contact-info,.contact-form{padding:16px}
  .product-hero{padding:100px 0 50px}
  .product-hero h1{font-size:1.8rem;letter-spacing:5px}
  .cw-category{flex-direction:column;align-items:flex-start;gap:8px;padding:16px 0}
  .cw-industry{width:auto}
  .case-image{height:180px}
  .case-list{padding:16px}
  .customer-wall{padding:0 0}
}