:root{
  --bg:#080a0f;
  --panel:#11141c;
  --panel-2:#171b25;
  --text:#f4f7fb;
  --muted:#9da6b7;
  --line:#242a36;
  --accent:#7cff5b;
  --accent-2:#52d7ff;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Inter,system-ui,sans-serif;line-height:1.6;
}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit}
.header{
  position:sticky;top:0;z-index:50;
  height:72px;display:flex;align-items:center;justify-content:space-between;
  padding:0 max(24px,calc((100vw - var(--max))/2));
  background:rgba(8,10,15,.78);backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.logo{font-family:"Space Grotesk",sans-serif;font-weight:700;letter-spacing:.08em}
.logo span{color:var(--accent)}
.nav{display:flex;gap:28px}
.nav a{color:var(--muted);font-size:14px;transition:.2s}
.nav a:hover{color:var(--text)}
.menu-btn{display:none;background:none;border:0;color:white;font-size:24px}
.hero{
  min-height:calc(100vh - 72px);max-width:var(--max);margin:auto;padding:72px 24px;
  display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:50px;position:relative;
}
.hero__glow{
  position:absolute;right:0;top:12%;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,255,91,.18),transparent 68%);
  filter:blur(10px);pointer-events:none;
}
.eyebrow{color:var(--accent);text-transform:uppercase;letter-spacing:.16em;font-size:12px;font-weight:800}
h1,h2,h3{font-family:"Space Grotesk",sans-serif;margin-top:0}
h1{font-size:clamp(48px,7vw,86px);line-height:.96;letter-spacing:-.055em;margin-bottom:28px}
h1 span{color:transparent;-webkit-text-stroke:1px #6e7788}
.hero__text{max-width:640px;color:var(--muted);font-size:18px}
.hero__actions{display:flex;gap:14px;margin:34px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 20px;border-radius:10px;font-weight:700}
.btn--primary{background:var(--accent);color:#071005}
.btn--ghost{border:1px solid var(--line);background:rgba(255,255,255,.02)}
.hero__stats{display:flex;gap:34px;margin-top:54px}
.hero__stats div{display:flex;flex-direction:column}
.hero__stats strong{font-size:26px}
.hero__stats span{color:var(--muted);font-size:12px}
.pc-card{position:relative;display:flex;justify-content:center}
.pc-case{
  width:min(360px,78vw);aspect-ratio:4/5;border-radius:28px;border:1px solid #303747;
  background:linear-gradient(145deg,#151a23,#0b0e14);box-shadow:0 30px 90px rgba(0,0,0,.5);
  position:relative;overflow:hidden;
}
.pc-case:after{content:"";position:absolute;inset:18px;border:1px solid rgba(255,255,255,.08);border-radius:18px}
.fan{position:absolute;width:82px;height:82px;border:8px solid #222a37;border-radius:50%;box-shadow:0 0 25px rgba(82,215,255,.3)}
.fan:after{content:"✣";position:absolute;inset:0;display:grid;place-items:center;color:var(--accent-2);font-size:34px}
.fan--1{right:34px;top:44px}.fan--2{right:34px;top:144px}.fan--3{right:34px;top:244px}
.gpu{position:absolute;left:35px;bottom:96px;width:245px;height:55px;border-radius:7px;background:linear-gradient(90deg,#222a37,#151922);border-left:5px solid var(--accent)}
.ram{position:absolute;left:56px;top:92px;width:15px;height:150px;background:linear-gradient(var(--accent-2),#253341);box-shadow:24px 0 0 #222a37}
.cooler{position:absolute;left:95px;top:120px;width:92px;height:92px;border-radius:50%;border:12px solid #2b3342}
.floating-tag{position:absolute;padding:10px 12px;border:1px solid #303747;border-radius:10px;background:rgba(15,18,25,.9);font-size:11px;color:var(--muted);box-shadow:0 12px 30px rgba(0,0,0,.35)}
.floating-tag b{display:block;color:white;font-size:12px}.tag--cpu{left:-8px;top:25%}.tag--gpu{right:-8px;bottom:23%}.tag--ram{left:7%;bottom:7%}
.section{max-width:var(--max);margin:auto;padding:110px 24px}
.section--dark{max-width:none;background:#0c0f15}.section--dark>*{max-width:var(--max);margin-left:auto;margin-right:auto}
.section-heading{margin-bottom:46px;max-width:720px}
.section-heading h2{font-size:clamp(34px,5vw,56px);line-height:1.05;margin-bottom:14px;letter-spacing:-.035em}
.section-heading>p:last-child{color:var(--muted)}
.component-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.component-card{
  background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px;cursor:pointer;transition:.2s;
}
.component-card:hover,.component-card.active{transform:translateY(-3px);border-color:rgba(124,255,91,.55);background:#151b18}
.component-icon{font-size:26px;color:var(--accent)}
.component-card h3{margin:18px 0 2px;font-size:16px}
.component-card p{margin:0;color:var(--muted);font-size:12px}
.component-info{margin-top:16px;padding:24px;border-radius:16px;background:linear-gradient(135deg,rgba(124,255,91,.09),rgba(82,215,255,.05));border:1px solid #293236}
.component-info span{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--accent)}
.component-info h3{margin:6px 0}.component-info p{color:var(--muted);margin:0;max-width:850px}
.timeline{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.step{display:flex;gap:20px;padding:24px;border:1px solid var(--line);background:var(--panel);border-radius:16px}
.step>span{color:var(--accent);font-family:"Space Grotesk";font-size:24px;font-weight:700}
.step h3{margin:2px 0 8px}.step p{margin:0;color:var(--muted);font-size:14px}
.builder{display:grid;grid-template-columns:.8fr 1.2fr;gap:18px}
.builder__controls,.builder__result{border:1px solid var(--line);background:var(--panel);border-radius:18px;padding:28px}
.builder__controls label{display:block;color:var(--muted);font-size:13px;margin-bottom:28px}
select{width:100%;margin-top:8px;background:#0c0f15;color:white;border:1px solid var(--line);border-radius:10px;padding:12px}
input[type=range]{width:100%;accent-color:var(--accent);margin:18px 0 4px}
.range-row{display:flex;justify-content:space-between;align-items:center;font-size:11px}.range-row strong{font-size:18px;color:white}
.result-top{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.result-top span{color:var(--muted);font-size:12px}.result-top h3{font-size:27px;margin:5px 0 22px}
.badge{border:1px solid rgba(124,255,91,.35);color:var(--accent)!important;background:rgba(124,255,91,.08);padding:7px 11px;border-radius:999px}
.allocation{display:grid;gap:12px}
.alloc-row{display:grid;grid-template-columns:120px 1fr 70px;gap:12px;align-items:center;font-size:13px}
.bar{height:8px;background:#232835;border-radius:999px;overflow:hidden}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:999px}
.alloc-row b{text-align:right}.notice{font-size:11px;color:#7f8998;margin:24px 0 0}
.section--tips{padding-top:70px}
.tips-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.tip{min-height:190px;padding:22px;border-radius:16px;border:1px solid var(--line);background:linear-gradient(180deg,#121620,#0d1016)}
.tip b{color:var(--accent);font-size:12px}.tip p{margin-top:42px;color:#ccd3de;font-size:14px}
footer{max-width:var(--max);margin:auto;padding:34px 24px 50px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px}
@media(max-width:900px){
  .nav{display:none;position:absolute;left:0;right:0;top:72px;flex-direction:column;padding:20px 24px;background:#0b0e14;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}.menu-btn{display:block}
  .hero{grid-template-columns:1fr;padding-top:52px}.hero__visual{margin:20px 0 35px}
  .component-grid{grid-template-columns:repeat(2,1fr)}
  .timeline,.builder{grid-template-columns:1fr}
  .tips-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .hero{padding-left:18px;padding-right:18px}.hero__stats{gap:16px}.hero__stats span{max-width:90px}
  .hero__actions{flex-direction:column}.component-grid{grid-template-columns:1fr}
  .tips-grid{grid-template-columns:1fr}.timeline{gap:10px}
  .floating-tag{display:none}.section{padding:82px 18px}.alloc-row{grid-template-columns:86px 1fr 56px}
  footer{flex-direction:column}
}