/* ========================================================================
   JoyinnTek — AMD-inspired dark theme
   AI + Communication Hardware Design
   ======================================================================== */

:root {
  --ink: #0a0a0f;
  --ink-2: #12121a;
  --ink-3: #1a1a28;
  --paper: #ffffff;
  --soft: #f5f6f8;
  --soft-2: #ebedf0;
  --muted: #6b7280;
  --muted-dark: #9ca3af;
  --line: #e5e7eb;
  --line-dark: rgba(255,255,255,0.08);
  --red: #e4002b;
  --red-2: #b8001f;
  --red-glow: rgba(228,0,43,0.3);
  --green: #10b981;
  --cyan: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #e4002b 0%, #06b6d4 100%);
  --accent-gradient-h: linear-gradient(90deg, #e4002b 0%, #06b6d4 100%);
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --max: 1280px;
  --radius: 8px;
  --radius-lg: 16px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 280ms cubic-bezier(0.4, 0, 0.2, 1);
  color-scheme: light;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:'Inter',Arial,"Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.65;letter-spacing:-.01em;-webkit-font-smoothing:antialiased}
body.is-menu-open{overflow:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;letter-spacing:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}
h1,h2,h3,h4{overflow-wrap:anywhere;margin:0}
.skip-link{position:absolute;left:16px;top:-64px;z-index:1000;padding:10px 16px;color:var(--paper);background:var(--red);border-radius:var(--radius);font-weight:600}
.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:900;background:rgba(10,10,15,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--line-dark);transition:background var(--transition)}
.nav-shell{width:min(100% - 48px,var(--max));min-height:72px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--paper);font-weight:700;line-height:1.1}
.brand-logo{height:36px;width:auto;display:block;object-fit:contain;filter:brightness(0) invert(1)}
.brand small{display:block;margin-top:3px;color:var(--muted-dark);font-size:11px;font-weight:500;letter-spacing:.02em;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-link{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;color:rgba(255,255,255,0.8);font-size:14px;font-weight:500;border-radius:6px;transition:all var(--transition)}
.nav-link:hover,.nav-link:focus-visible,.nav-item:hover .nav-link{color:var(--paper);background:rgba(255,255,255,0.08)}
.dropdown{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(8px);min-width:260px;padding:8px;display:grid;gap:2px;background:rgba(18,18,26,0.98);border:1px solid var(--line-dark);border-radius:var(--radius-lg);box-shadow:0 24px 64px rgba(0,0,0,0.4),0 0 0 1px rgba(255,255,255,0.05);opacity:0;pointer-events:none;transition:all 200ms var(--ease)}
.nav-item:hover .dropdown,.nav-item:focus-within .dropdown{opacity:1;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.dropdown a{padding:10px 14px;color:rgba(255,255,255,0.75);border-radius:6px;font-size:14px;transition:all 160ms var(--ease)}
.dropdown a:hover,.dropdown a:focus-visible{color:var(--paper);background:rgba(228,0,43,0.15)}
.nav-actions{display:inline-flex;align-items:center;gap:10px}
.lang-switch{display:inline-flex;align-items:center;gap:2px;padding:3px;background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius)}
.lang-switch button{min-width:40px;height:32px;padding:0 10px;color:rgba(255,255,255,0.6);background:transparent;border:0;border-radius:5px;font-size:13px;font-weight:600;transition:all var(--transition)}
.lang-switch button[aria-pressed="true"]{color:var(--paper);background:var(--red);box-shadow:0 0 12px var(--red-glow)}
.lang-switch button:hover:not([aria-pressed="true"]){color:var(--paper);background:rgba(255,255,255,0.1)}
.menu-toggle{display:none;width:42px;height:42px;align-items:center;justify-content:center;color:var(--paper);background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:var(--radius);flex-direction:column;gap:5px}
.menu-toggle span,.menu-toggle::before,.menu-toggle::after{content:"";width:20px;height:2px;display:block;background:currentColor;transition:all var(--transition)}
.hero{position:relative;min-height:420px;height:calc(100vh - 200px);max-height:560px;display:flex;align-items:center;overflow:hidden;color:var(--paper);background-color:var(--ink);background-position:center;background-size:cover}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,10,15,0.85) 0%,rgba(10,10,15,0.6) 50%,rgba(6,182,212,0.15) 100%)}
.hero::before{content:"";position:absolute;inset:0;z-index:0;background:radial-gradient(ellipse 600px 400px at 20% 80%,rgba(228,0,43,0.15) 0%,transparent 70%),radial-gradient(ellipse 500px 300px at 80% 20%,rgba(6,182,212,0.12) 0%,transparent 70%)}
.hero-content{position:relative;z-index:1;width:min(100% - 48px,var(--max));margin:0 auto;padding:60px 0 80px}
.eyebrow{margin:0 0 20px;font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.15em;background:var(--accent-gradient-h);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero h1{max-width:780px;margin:0;font-size:56px;line-height:1.06;font-weight:800;letter-spacing:-.03em}
.hero p{max-width:680px;margin:20px 0 0;color:rgba(255,255,255,0.7);font-size:18px;line-height:1.7}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 28px;color:var(--paper);background:var(--red);border:1px solid var(--red);border-radius:var(--radius);font-weight:700;font-size:15px;transition:all var(--transition);position:relative;overflow:hidden}
.button::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,transparent 50%,rgba(255,255,255,0.1) 100%);opacity:0;transition:opacity var(--transition)}
.button:hover,.button:focus-visible{transform:translateY(-2px);box-shadow:0 8px 24px var(--red-glow);background:var(--red-2);border-color:var(--red-2)}
.button:hover::after{opacity:1}
.button.secondary{color:var(--paper);background:transparent;border-color:rgba(255,255,255,0.3)}
.button.secondary:hover,.button.secondary:focus-visible{background:rgba(255,255,255,0.1);border-color:var(--paper);box-shadow:0 8px 24px rgba(255,255,255,0.08)}
.button.secondary::after{display:none}
.button.dark{color:var(--paper);background:var(--ink-2);border-color:var(--line-dark)}
.button.dark:hover,.button.dark:focus-visible{background:var(--red);border-color:var(--red);box-shadow:0 8px 24px var(--red-glow)}
.button.outline-dark{color:var(--ink);background:transparent;border-color:var(--line)}
.button.outline-dark:hover,.button.outline-dark:focus-visible{color:var(--paper);background:var(--ink);border-color:var(--ink);box-shadow:0 8px 24px rgba(0,0,0,0.15)}
.metrics{position:relative;background:var(--ink);color:var(--paper);overflow:hidden}
.metrics::before{content:"";position:absolute;inset:0;background:var(--accent-gradient-h);opacity:0.06}
.metrics-grid{width:min(100% - 48px,var(--max));margin:0 auto;position:relative;display:grid;grid-template-columns:repeat(4,1fr)}
.metric{min-height:120px;padding:28px;display:grid;align-content:center;border-right:1px solid var(--line-dark);transition:background var(--transition)}
.metric:first-child{border-left:1px solid var(--line-dark)}
.metric:hover{background:rgba(255,255,255,0.03)}
.metric strong{display:block;font-size:32px;line-height:1.1;font-weight:800;background:var(--accent-gradient-h);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.metric span{margin-top:8px;color:var(--muted-dark);font-size:13px;letter-spacing:.01em}
.section{padding:100px 0}
.section.compact{padding:64px 0}
.section.dark{color:var(--paper);background:var(--ink)}
.section.soft{background:var(--soft)}
.section.ink-2{color:var(--paper);background:var(--ink-2)}
.section.red-band{color:var(--paper);position:relative;overflow:hidden;background:linear-gradient(135deg,var(--red) 0%,var(--red-2) 100%)}
.section.red-band::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 600px 400px at 90% 50%,rgba(6,182,212,0.2) 0%,transparent 70%)}
.wrap{width:min(100% - 48px,var(--max));margin:0 auto}
.section-head{max-width:800px;margin-bottom:48px}
.section-head.center{margin-inline:auto;text-align:center}
.kicker{margin:0 0 12px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.15em;color:var(--red)}
.dark .kicker,.red-band .kicker,.ink-2 .kicker{background:var(--accent-gradient-h);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
h2{font-size:42px;line-height:1.12;font-weight:800;letter-spacing:-.02em}
h3{font-size:24px;line-height:1.3;font-weight:700}
h4{font-size:18px;line-height:1.4;font-weight:600}
.lede{margin:18px 0 0;color:var(--muted);font-size:18px;line-height:1.7}
.dark .lede,.ink-2 .lede{color:var(--muted-dark)}
.grid{display:grid;gap:24px}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.feature,.product-card,.resource-card,.news-card,.contact-card,.spec-panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);transition:all var(--transition)}
.feature:hover,.product-card:hover,.resource-card:hover,.news-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.08)}
.dark .feature,.dark .product-card,.dark .resource-card,.dark .news-card,.dark .spec-panel,.ink-2 .feature,.ink-2 .product-card{background:var(--ink-3);border-color:var(--line-dark)}
.dark .feature:hover,.dark .product-card:hover,.dark .resource-card:hover,.dark .news-card:hover,.ink-2 .feature:hover,.ink-2 .product-card:hover{box-shadow:0 12px 40px rgba(0,0,0,0.3),0 0 0 1px rgba(228,0,43,0.1)}
.feature{min-height:260px;padding:32px;display:grid;align-content:space-between;gap:24px}
.feature p,.product-card p,.resource-card p,.news-card p,.contact-card p,.spec-panel p{color:var(--muted)}
.dark .feature p,.dark .product-card p,.dark .resource-card p,.dark .news-card p,.dark .spec-panel p,.ink-2 .feature p,.ink-2 .product-card p{color:var(--muted-dark)}
.feature-mark{width:40px;height:4px;border-radius:2px;background:var(--red)}
.feature.alt .feature-mark{background:var(--green)}
.feature.cyan .feature-mark{background:var(--cyan)}
.product-card{overflow:hidden;display:grid;grid-template-rows:auto 1fr}
.product-media{aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;padding:24px;background:linear-gradient(180deg,#f8f9fa 0%,#eef0f2 100%);border-bottom:1px solid var(--line);transition:background var(--transition)}
.dark .product-media,.ink-2 .product-media{background:linear-gradient(180deg,rgba(255,255,255,0.04) 0%,rgba(255,255,255,0.02) 100%);border-bottom-color:var(--line-dark)}
.product-media img{width:100%;height:100%;object-fit:contain;transition:transform var(--transition)}
.product-card:hover .product-media img{transform:scale(1.03)}
.product-body{padding:24px;display:grid;gap:16px}
.product-body p{margin:0}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-flex;align-items:center;min-height:28px;padding:0 12px;color:var(--ink);background:var(--soft);border:1px solid var(--line);border-radius:20px;font-size:12px;font-weight:600}
.dark .tag,.ink-2 .tag{color:var(--paper);background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.1)}
.text-link{display:inline-flex;align-items:center;gap:8px;width:fit-content;color:var(--red);font-weight:700;font-size:14px;transition:all var(--transition)}
.text-link::after{content:"\2192";transition:transform var(--transition)}
.text-link:hover,.text-link:focus-visible{color:var(--red-2)}
.text-link:hover::after{transform:translateX(4px)}
.dark .text-link,.ink-2 .text-link{color:#ff6b81}
.dark .text-link:hover,.ink-2 .text-link:hover{color:#ff8fa0}
.media-split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,0.9fr);gap:64px;align-items:center}
.media-split.reverse{grid-template-columns:minmax(320px,0.9fr) minmax(0,1.1fr)}
.media-frame{overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--paper);position:relative}
.media-frame img{width:100%;height:100%;min-height:340px;object-fit:cover}
.media-frame::after{content:"";position:absolute;inset:0;border-radius:var(--radius-lg);box-shadow:inset 0 0 0 1px rgba(0,0,0,0.05)}
.dark .media-frame,.ink-2 .media-frame{border-color:var(--line-dark);box-shadow:0 0 40px rgba(0,0,0,0.3)}
.check-list{display:grid;gap:16px;margin:28px 0 0;padding:0;list-style:none}
.check-list li{position:relative;padding-left:28px;color:var(--muted)}
.dark .check-list li,.ink-2 .check-list li{color:var(--muted-dark)}
.check-list li::before{content:"";position:absolute;left:0;top:0.55em;width:12px;height:12px;border-radius:50%;background:var(--accent-gradient)}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line-dark)}
.timeline-step{min-height:200px;padding:32px 28px;border-right:1px solid var(--line-dark);transition:background var(--transition)}
.timeline-step:first-child{border-left:1px solid var(--line-dark)}
.timeline-step:hover{background:rgba(255,255,255,0.03)}
.timeline-step span{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;margin-bottom:20px;border-radius:50%;font-weight:800;font-size:14px;background:var(--accent-gradient);color:var(--paper)}
.resource-card,.news-card,.contact-card,.spec-panel{padding:28px;border-radius:var(--radius-lg)}
.news-card img,.resource-card img{width:100%;aspect-ratio:16/9;margin-bottom:20px;object-fit:cover;border-radius:var(--radius)}
.spec-table{width:100%;border-collapse:collapse;margin-top:24px;color:var(--muted)}
.spec-table th,.spec-table td{padding:16px 0;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table th{width:36%;color:var(--ink);font-weight:700}
.dark .spec-table{color:var(--muted-dark)}
.dark .spec-table th,.dark .spec-table td{border-bottom-color:var(--line-dark)}
.dark .spec-table th{color:var(--paper)}
.page-hero{min-height:380px;padding:100px 0 72px;display:flex;align-items:flex-end;color:var(--paper);background-color:var(--ink);background-position:right center;background-size:60% auto;background-repeat:no-repeat;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,10,15,0.88) 0%,rgba(10,10,15,0.7) 50%,rgba(6,182,212,0.1) 100%)}
.page-hero::before{content:"";position:absolute;inset:0;z-index:0;background:radial-gradient(ellipse 500px 300px at 10% 90%,rgba(228,0,43,0.12) 0%,transparent 70%)}
.page-hero .wrap{position:relative;z-index:1}
.page-hero h1{max-width:820px;font-size:48px;line-height:1.1;font-weight:800;letter-spacing:-.02em}
.page-hero p{max-width:720px;margin:16px 0 0;color:rgba(255,255,255,0.7);font-size:18px}
.breadcrumb{margin:0 0 16px;color:rgba(255,255,255,0.5);font-size:13px;font-weight:600;letter-spacing:.04em}
.contact-grid{display:grid;grid-template-columns:minmax(0,0.85fr) minmax(320px,1.15fr);gap:32px;align-items:start}
.contact-list{display:grid;gap:16px;margin-top:24px}
.contact-item{padding:20px 0;border-top:1px solid var(--line)}
.contact-item strong{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:4px}
.contact-item span,.contact-item a{color:var(--ink);font-weight:500}
.contact-item a:hover{color:var(--red)}
.contact-form{display:grid;gap:16px}
.contact-form label{display:grid;gap:6px;color:var(--muted);font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.04em}
.contact-form input,.contact-form textarea{width:100%;min-height:48px;padding:14px 16px;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);transition:border-color var(--transition),box-shadow var(--transition)}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--red);box-shadow:0 0 0 3px var(--red-glow)}
.contact-form textarea{min-height:140px;resize:vertical}
.map-panel{min-height:300px;display:grid;place-items:center;padding:32px;color:var(--paper);background:var(--ink-2);border-radius:var(--radius-lg);border:1px solid var(--line-dark)}
.map-panel p{max-width:620px;margin:0;color:rgba(255,255,255,0.7)}
.site-footer{color:var(--paper);background:var(--ink);position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--accent-gradient-h);opacity:0.4}
.footer-grid{width:min(100% - 48px,var(--max));margin:0 auto;padding:64px 0 40px;display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px}
.footer-grid p,.footer-grid a{color:var(--muted-dark);font-size:14px}
.footer-grid a:hover,.footer-grid a:focus-visible{color:var(--paper)}
.footer-col{display:grid;align-content:start;gap:12px}
.footer-col h4{color:var(--paper);font-size:14px;text-transform:uppercase;letter-spacing:.08em}
.footer-bottom{width:min(100% - 48px,var(--max));margin:0 auto;padding:24px 0 36px;border-top:1px solid var(--line-dark);color:rgba(255,255,255,0.4);font-size:13px}
.footer-bottom a{color:rgba(255,255,255,0.48);transition:color var(--transition)}
.footer-bottom a:hover,.footer-bottom a:focus-visible{color:var(--paper)}
.footer-records{display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px 12px;margin-left:18px;vertical-align:baseline}
.footer-separator{color:rgba(255,255,255,0.22)}
.reveal{opacity:0;transform:translateY(30px);transition:opacity 0.6s var(--ease),transform 0.6s var(--ease)}
.reveal.is-visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:0.1s}
.reveal-delay-2{transition-delay:0.2s}
.reveal-delay-3{transition-delay:0.3s}
.only-mobile{display:none}
.gradient-text{background:var(--accent-gradient-h);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.accent-line{width:60px;height:3px;border-radius:2px;background:var(--accent-gradient-h);margin-bottom:20px}
.glass-card{background:var(--glass);border:1px solid var(--glass-border);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-lg)}
.grid-bg{position:relative}
.grid-bg::after{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 60% at 50% 50%,black 30%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 50%,black 30%,transparent 70%)}

@media (max-width:1040px){
  .nav-shell{min-height:68px}
  .menu-toggle{display:inline-flex}
  .nav{position:fixed;inset:68px 0 auto;max-height:calc(100vh - 68px);overflow:auto;display:none;flex-direction:column;align-items:stretch;gap:0;padding:16px 20px 24px;background:rgba(10,10,15,0.98);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-top:1px solid var(--line-dark)}
  body.is-menu-open .nav{display:flex}
  .nav-item{border-bottom:1px solid var(--line-dark)}
  .nav-link{width:100%;min-height:52px;justify-content:space-between}
  .dropdown{position:static;min-width:0;padding:0 0 12px 16px;display:grid;opacity:1;pointer-events:auto;transform:none;box-shadow:none;background:transparent;border:0}
  .nav-actions{margin-left:auto}
  .metrics-grid,.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}
  .media-split,.media-split.reverse,.contact-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:760px){
  .nav-shell,.wrap,.metrics-grid,.footer-grid,.footer-bottom{width:min(100% - 28px,var(--max))}
  .brand small{display:none}
  .brand-logo{height:32px}
  .lang-switch button{min-width:36px;padding:0 8px}
  .hero{min-height:360px;height:calc(100vh - 200px);max-height:480px}
  .hero h1{font-size:34px}
  .hero p,.lede,.page-hero p{font-size:16px}
  h2{font-size:30px}
  h3{font-size:21px}
  .section{padding:72px 0}
  .grid.two,.grid.three,.grid.four,.metrics-grid,.timeline,.footer-grid{grid-template-columns:1fr}
  .metric{border-bottom:1px solid var(--line-dark)}
  .media-frame img{min-height:240px}
  .page-hero{min-height:320px;padding:72px 0 56px;background-size:50% auto}
  .page-hero h1{font-size:32px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .button{width:100%;justify-content:center}
  .timeline-step:first-child{border-left:0}
  .timeline-step{border-right:0;border-bottom:1px solid var(--line-dark)}
  .footer-records{display:flex;margin:10px 0 0}
  .only-mobile{display:block}
}