:root {
    --brand:        #6f3df5;
    --brand-2:      #8b6dff;
    --brand-3:      #a78bfa;
    --brand-deep:   #5a2dd6;
    --brand-soft:   #f1ecff;
    --brand-soft-2: #e8e0ff;
    --brand-bg:     #f9f6ff;
    --brand-glow:   rgba(111,61,245,0.35);

    --bg:           #ffffff;
    --bg-cream:     #fdfcff;
    --bg-tint:      #f6f3fc;

    --ink:          #1c1538;
    --ink-2:        #3d3361;
    --ink-mute:     #6c6489;
    --ink-dim:      #9893ad;

    --rule:         #ece8f5;
    --rule-soft:    #f3f0fa;

    --pink:         #ec4899;
    --pink-soft:    #fce7f3;
    --teal:         #14b8a6;
    --teal-soft:    #d1fae8;
    --orange:       #f97316;
    --orange-soft:  #fed7aa;
    --emerald:      #10b981;
    --emerald-soft: #d1fae5;
    --amber:        #f59e0b;
    --amber-soft:   #fef3c7;
    --cyan:         #06b6d4;
    --cyan-soft:    #cffafe;
    --red:          #ef4444;
    --red-soft:     #fee2e2;
    --blue:         #3b82f6;
    --blue-soft:    #dbeafe;

    --r-sm: 12px;
    --r-md: 18px;
    --r-lg: 28px;
    --r-xl: 36px;
    --r-pill: 999px;

    --shadow-sm: 0 2px 8px rgba(28,21,56,0.05);
    --shadow-md: 0 10px 32px rgba(111,61,245,0.10);
    --shadow-lg: 0 24px 60px rgba(111,61,245,0.15);
    --shadow-glow: 0 0 60px rgba(111,61,245,0.25);
  }

 
  a { color: inherit; text-decoration: none; }
  button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }


  /* ========== HERO ========== */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  .hero-cta{
    display:flex;gap:12px;justify-content:left;flex-wrap:wrap;
    animation:fadeUp .6s .2s ease both;margin-bottom:40px;
  }
  .btn-pri{
    display:inline-flex;align-items:center;gap:7px;
    background: linear-gradient(90deg, rgba(117, 84, 247, 1) 0%, rgba(117, 84, 247, 1) 62%, rgba(147, 94, 223, 1) 95%);color:#fff;
    padding:14px 30px;border-radius:10px;
    font-size:14.5px;font-weight:700;border:none;
    box-shadow:0 6px 24px rgba(108,71,255,.32);transition:all .22s;
  }
  .btn-pri:hover{    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(168, 85, 247, 0.5);
    color: #fff;
}
  .btn-sec{
    display:inline-flex;align-items:center;gap:7px;
    background:transparent;color:#fff;
    padding:13px 26px;border-radius:10px;
    font-size:14px;font-weight:700;
    border:1.5px solid rgba(255,255,255,0.25);transition:all .22s;
  }
  .btn-sec:hover{border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.05);transform:translateY(-2px);color: #fff;}

  .hero {
    position: relative;
    padding: 60px 24px 50px;
    overflow: hidden;
    background:
      radial-gradient(ellipse 70% 60% at 15% 10%, rgba(167,139,250,0.22) 0%, transparent 55%),
      radial-gradient(ellipse 55% 50% at 85% 90%, rgba(236,72,153,0.12) 0%, transparent 55%),
      radial-gradient(ellipse 40% 40% at 70% 20%, rgba(6,182,212,0.08) 0%, transparent 50%),
      linear-gradient(180deg, var(--bg) 0%, var(--bg-cream) 100%);
  }
  .hero-inner {
    display: grid; grid-template-columns: 1.1fr 0.9fr;
    gap: 60px; align-items: center;
    padding-top: 40px;
  }
  @media (max-width: 960px) { .hero-inner { grid-template-columns: 1fr; gap: 40px; padding-top: 20px; } }

  .hero-pill {
    animation: fadeUp .55s cubic-bezier(.22,.61,.36,1) both;
    display: inline-flex; align-items: center; gap: 10px;
    padding: 7px 14px 7px 8px;
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: var(--r-pill);
    box-shadow: var(--shadow-sm);
    font-size: 12.5px; color: var(--ink-2); font-weight: 500;
    margin-bottom: 28px;
  }
  .hero-pill .chip {
    background: linear-gradient(135deg, var(--brand-2) 0%, var(--brand) 100%);
    color: #fff;
    padding: 3px 10px; border-radius: var(--r-pill);
    font-size: 11px; font-weight: 700; letter-spacing: 0.04em;
  }
  .hero-pill .chip.green { background: linear-gradient(135deg, #10b981, #0d9488); }

  .hero h1 {
    animation: fadeUp .55s .1s cubic-bezier(.22,.61,.36,1) both;
    font-size: clamp(38px, 5.2vw, 60px);
    line-height: 1.04;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--ink);
    margin-bottom: 24px;
  }
  .hero h1 .grad {
    background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand) 40%, var(--brand-3) 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .hero h1 .underline-wave { position: relative; display: inline-block; }
  .hero h1 .underline-wave::after {
    content: '';
    position: absolute; left: 0; right: 0; bottom: -10px;
    height: 10px;
    background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 10'><path d='M0 5 Q15 0,30 5 T60 5 T90 5 T120 5' fill='none' stroke='%236f3df5' stroke-width='2.5' stroke-linecap='round'/></svg>") repeat-x;
    background-size: 80px 10px;
    opacity: 0.75;
  }

  .hero p.lede {
    animation: fadeUp .55s .2s cubic-bezier(.22,.61,.36,1) both;
    font-size: 17px; color: var(--ink-mute);
    line-height: 1.65;
    margin-bottom: 32px;
    max-width: 560px;
  }
  .lede strong { color: var(--ink); font-weight: 700; }

  .hero-cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; animation: fadeUp .55s .3s cubic-bezier(.22,.61,.36,1) both; }
  .btn-primary {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 28px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--brand-2) 0%, var(--brand) 100%);
    color: #fff; font-weight: 600; font-size: 14.5px;
    box-shadow: 0 10px 28px var(--brand-glow);
    transition: transform .2s, box-shadow .2s;
  }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px var(--brand-glow); }
  .btn-primary .arrow {
    background: rgba(255,255,255,0.2);
    width: 22px; height: 22px; border-radius: 50%;
    display: grid; place-items: center;
    transition: transform .2s;
  }
  .btn-primary:hover .arrow { transform: translateX(3px); }
  .btn-ghost {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    background: #fff; color: var(--ink);
    border: 1px solid var(--rule);
    font-weight: 600; font-size: 14.5px;
    transition: border-color .2s, background .2s;
  }
  .btn-ghost:hover { border-color: var(--brand); background: var(--brand-soft); color: var(--brand); }

  /* hero stat row */
  .hero-stats {
    animation: fadeUp .55s .4s cubic-bezier(.22,.61,.36,1) both;
    margin-top: 36px;
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    max-width: 620px;
  }
  @media (max-width: 640px) { .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; } }
  .stat-card {
    position: relative;
    padding: 16px;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(12px);
    border: 1px solid var(--rule);
    border-radius: 18px;
    box-shadow: 0 4px 14px rgba(28,21,56,0.04);
    transition: transform .25s, box-shadow .25s, border-color .25s;
    overflow: hidden;
  }
  .stat-card:hover { transform: translateY(-3px); border-color: var(--brand-3); box-shadow: 0 12px 28px rgba(111,61,245,0.12); }
  .stat-card::before {
    content: ''; position: absolute;
    top: -30px; right: -20px;
    width: 80px; height: 80px; border-radius: 50%;
    filter: blur(28px); opacity: 0.35; pointer-events: none;
  }
  .stat-card.c1::before { background: var(--brand-3); }
  .stat-card.c2::before { background: var(--cyan); }
  .stat-card.c3::before { background: var(--emerald); }
  .stat-card.c4::before { background: var(--amber); }
  .stat-card > * { position: relative; z-index: 1; }
  .stat-icon {
    width: 26px; height: 26px;
    border-radius: 8px;
    display: grid; place-items: center;
    margin-bottom: 10px;
    box-shadow: 0 3px 10px rgba(28,21,56,0.06);
  }
  .stat-card.c1 .stat-icon { background: var(--brand-soft); color: var(--brand); }
  .stat-card.c2 .stat-icon { background: var(--cyan-soft); color: #0e7490; }
  .stat-card.c3 .stat-icon { background: var(--emerald-soft); color: #047857; }
  .stat-card.c4 .stat-icon { background: var(--amber-soft); color: #b45309; }
  .stat-num {
    font-size: 22px; font-weight: 800; letter-spacing: -0.03em;
    color: var(--ink); line-height: 1;
    display: flex; align-items: baseline; gap: 2px;
  }
  .stat-num .unit { font-size: 12px; color: var(--ink-mute); font-weight: 600; }
  .stat-lbl { font-size: 11.5px; color: var(--ink-mute); margin-top: 6px; font-weight: 600; }

  /* ========== HERO CLUSTER VISUAL ========== */
  .hero-cluster {
    position: relative;
    aspect-ratio: 1/1.05;
    max-width: 460px;
    margin-left: auto;
  }
  .hero-cluster::before {
    content: ''; position: absolute; inset: -8%;
    background: radial-gradient(circle, rgba(167,139,250,0.35) 0%, transparent 60%);
    filter: blur(50px);
    z-index: 0;
  }
  .cluster-card {
    position: relative; z-index: 1;
    width: 100%; height: 100%;
    background: linear-gradient(160deg, #1c1538 0%, #2a1d5e 60%, #3d2072 100%);
    border-radius: var(--r-xl);
    padding: 26px;
    color: #fff;
    border: 1px solid #3d2680;
    box-shadow: var(--shadow-glow);
    overflow: hidden;
  }
  .cluster-card::after {
    content: ''; position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 28px 28px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 30%, #000, transparent 80%);
    pointer-events: none;
  }
  .cluster-card > * { position: relative; z-index: 1; }
  .cluster-head {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 22px;
  }
  .cluster-head-title {
    font-size: 13px; font-weight: 700; letter-spacing: -0.01em;
  }
  .cluster-head-title small {
    display: block; margin-top: 3px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px; font-weight: 600;
    color: rgba(255,255,255,0.5); letter-spacing: 0.04em;
  }
  .cluster-head .live { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700; color: var(--brand-3); }
  .cluster-head .live::before {
    content: ''; width: 7px; height: 7px; border-radius: 50%;
    background: var(--brand-3); box-shadow: 0 0 0 4px rgba(167,139,250,0.25);
    animation: pulse 2s ease-in-out infinite;
  }
  @keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(167,139,250,0); } }

  /* node grid inside cluster */
  .cluster-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 22px;
  }
  .node {
    aspect-ratio: 1/1;
    background: rgba(167,139,250,0.08);
    border: 1px solid rgba(167,139,250,0.16);
    border-radius: 8px;
    display: grid; place-items: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px; font-weight: 700;
    color: rgba(255,255,255,0.45);
    transition: all .3s;
    position: relative;
  }
  .node.active {
    background: linear-gradient(135deg, var(--brand-3), var(--brand));
    border-color: var(--brand-3);
    color: #fff;
    box-shadow: 0 0 16px var(--brand-glow);
  }
  .node.active::after {
    content: ''; position: absolute; inset: 0;
    border-radius: 8px;
    background: radial-gradient(circle, rgba(167,139,250,0.4) 0%, transparent 70%);
    animation: nodePulse 2s ease-in-out infinite;
  }
  @keyframes nodePulse { 0%,100% { opacity: 0.4; } 50% { opacity: 0.8; } }

  .cluster-specs {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 8px 14px;
    padding-top: 16px;
    border-top: 1px dashed rgba(255,255,255,0.12);
  }
  .cluster-specs > div {
    display: flex; flex-direction: column; gap: 2px;
  }
  .cs-lbl {
    font-size: 10px;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase; letter-spacing: 0.08em;
    font-weight: 700;
  }
  .cs-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px; font-weight: 700; color: #fff;
  }


  /* ========== SECTION SHELL ========== */
  .section { padding: 96px 24px; }
  .section-inner { /* layout handled by .container */ }
  .eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 14px;
    background: var(--brand-soft);
    color: var(--brand);
    border-radius: var(--r-pill);
    font-size: 12px; font-weight: 700;
    letter-spacing: 0.06em; text-transform: uppercase;
  }
  .eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }
  h2.heading {
    font-size: clamp(32px, 4vw, 46px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--ink);
    margin: 16px 0 18px;
  }
  h2.heading .grad {
    background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand) 50%, var(--brand-3) 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .sub {
    font-size: 16px; color: var(--ink-mute);
    max-width: 720px; line-height: 1.65;
  }
  .section-head-center { text-align: center; margin-bottom: 56px; }


  /* ========== "WHY CHOOSE" SECTION ========== */
  .why-section {
    background: var(--bg);
    position: relative;
    overflow: hidden;
  }
  .why-section::before {
    content: ''; position: absolute; inset: 0;
    background:
      radial-gradient(ellipse 50% 40% at 90% 0%, rgba(167,139,250,0.10) 0%, transparent 60%),
      radial-gradient(ellipse 50% 40% at 10% 100%, rgba(236,72,153,0.06) 0%, transparent 60%);
    pointer-events: none;
  }
  .why-section > * { position: relative; }

  .why-grid {
    margin-top: 56px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  @media (max-width: 960px) { .why-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 600px) { .why-grid { grid-template-columns: 1fr; } }

  .why-card {
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: var(--r-xl);
    padding: 30px 28px;
    transition: transform .25s, border-color .25s, box-shadow .25s;
    position: relative; overflow: hidden;
    display: flex; flex-direction: column;
  }
  .why-card::before {
    content: ''; position: absolute;
    top: -40%; right: -25%;
    width: 220px; height: 220px; border-radius: 50%;
    filter: blur(50px); opacity: 0.20;
    background: var(--brand-3);
    transition: opacity .3s;
  }
  .why-card:hover {
    transform: translateY(-3px);
    border-color: var(--brand-3);
    box-shadow: var(--shadow-md);
  }
  .why-card:hover::before { opacity: 0.36; }
  .why-card > * { position: relative; z-index: 1; }
  .why-card.warm::before  { background: var(--orange); }
  .why-card.cool::before  { background: var(--teal); }
  .why-card.pink::before  { background: var(--pink); }
  .why-card.cyan::before  { background: var(--cyan); }
  .why-card.amber::before { background: var(--amber); }

  .why-icon {
    width: 50px; height: 50px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--brand-soft), #fff);
    border: 1px solid var(--rule);
    display: grid; place-items: center;
    color: var(--brand);
    margin-bottom: 20px;
    box-shadow: 0 6px 18px rgba(111,61,245,0.12);
  }
  .why-card.warm  .why-icon { background: linear-gradient(135deg, var(--orange-soft), #fff); color: var(--orange); box-shadow: 0 6px 18px rgba(249,115,22,0.14); }
  .why-card.cool  .why-icon { background: linear-gradient(135deg, var(--teal-soft), #fff);   color: var(--teal);   box-shadow: 0 6px 18px rgba(20,184,166,0.14); }
  .why-card.pink  .why-icon { background: linear-gradient(135deg, var(--pink-soft), #fff);   color: var(--pink);   box-shadow: 0 6px 18px rgba(236,72,153,0.14); }
  .why-card.cyan  .why-icon { background: linear-gradient(135deg, var(--cyan-soft), #fff);   color: #0e7490;       box-shadow: 0 6px 18px rgba(6,182,212,0.14); }
  .why-card.amber .why-icon { background: linear-gradient(135deg, var(--amber-soft), #fff);  color: #b45309;       box-shadow: 0 6px 18px rgba(245,158,11,0.14); }

  .why-card h3 {
    font-size: 19px; font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--ink);
    margin-bottom: 10px;
    line-height: 1.3;
  }
  .why-card p {
    font-size: 14px; color: var(--ink-mute);
    line-height: 1.65;
  }
  .why-card p b { color: var(--ink); font-weight: 700; }

  /* ========== "WHAT IS A GPU CLUSTER" PRIMER ========== */
  .primer-section {
    background: var(--bg);
  }
  .primer-grid {
    margin-top: 56px;
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  @media (max-width: 960px) { .primer-grid { grid-template-columns: 1fr; } }
  .primer-card {
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: var(--r-xl);
    padding: 30px 28px;
    transition: transform .25s, border-color .25s, box-shadow .25s;
    position: relative; overflow: hidden;
  }
  .primer-card::before {
    content: ''; position: absolute;
    top: -40%; right: -25%;
    width: 220px; height: 220px; border-radius: 50%;
    filter: blur(50px); opacity: 0.18;
    background: var(--brand-3);
    transition: opacity .3s;
  }
  .primer-card:hover {
    transform: translateY(-3px);
    border-color: var(--brand-3);
    box-shadow: var(--shadow-md);
  }
  .primer-card:hover::before { opacity: 0.32; }
  .primer-card > * { position: relative; z-index: 1; }
  .primer-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px; font-weight: 700;
    color: var(--brand);
    letter-spacing: 0.08em;
    margin-bottom: 18px;
  }
  .primer-card h3 {
    font-size: 20px; font-weight: 700;
    letter-spacing: -0.015em; color: var(--ink);
    margin-bottom: 12px;
    line-height: 1.25;
  }
  .primer-card p {
    font-size: 14.5px; color: var(--ink-mute);
    line-height: 1.7;
  }
  .primer-card p a {
    color: var(--brand);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    text-decoration-color: rgba(111,61,245,0.4);
    transition: text-decoration-color .2s;
  }
  .primer-card p a:hover { text-decoration-color: var(--brand); }

  /* ========== GPU CARDS ========== */
  .gpu-section {
    background: linear-gradient(180deg, var(--bg-cream) 0%, var(--bg) 100%);
    position: relative;
  }
  .gpu-section::before {
    content: ''; position: absolute; inset: 0;
    background:
      radial-gradient(ellipse 50% 40% at 10% 0%, rgba(167,139,250,0.10) 0%, transparent 60%),
      radial-gradient(ellipse 50% 40% at 90% 100%, rgba(236,72,153,0.06) 0%, transparent 60%);
    pointer-events: none;
  }
  .gpu-section > * { position: relative; }

  .gpu-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
  @media (max-width: 1100px) { .gpu-grid { grid-template-columns: repeat(3, 1fr); } }
  @media (max-width: 820px)  { .gpu-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 520px)  { .gpu-grid { grid-template-columns: 1fr; } }

  .gpu-card {
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: var(--r-lg);
    padding: 24px 22px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    position: relative;
    overflow: hidden;
    display: flex; flex-direction: column;
  }
  .gpu-card::before {
    content: ''; position: absolute;
    top: -40%; right: -25%;
    width: 200px; height: 200px; border-radius: 50%;
    filter: blur(50px); opacity: 0.18;
    background: var(--brand-3);
    transition: opacity .3s;
    pointer-events: none;
  }
  .gpu-card:hover {
    transform: translateY(-4px);
    border-color: #f2f2f2;
    box-shadow: var(--shadow-lg);
    background: #f2f2f2;
  }
  .gpu-card:hover::before { opacity: 0.35; }
  .gpu-card > * { position: relative; z-index: 1; }

  
  .gpu-card.featured::before { background: var(--brand-3); opacity: 0.3; }
  .gpu-card.featured::after {
    content: ''; position: absolute; inset: 0;
    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: 26px 26px;
    mask-image: radial-gradient(ellipse 70% 60% at 70% 30%, #000, transparent 80%);
    pointer-events: none;
  }

  /* visual chip header */
  .gpu-visual {
    position: relative;
    aspect-ratio: 16/10;
    border-radius: var(--r-md);
    margin-bottom: 18px;
    overflow: hidden;
    background: linear-gradient(135deg, #1c1538 0%, #2a1d5e 100%);
  }
  .gpu-visual img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .5s ease;
  }
  .gpu-card:hover .gpu-visual img { transform: scale(1.06); }
  .gpu-visual::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(28,21,56,0.35) 100%);
    pointer-events: none;
  }

  /* tag chip */
  .gpu-tag {
    position: absolute;
    top: 12px; left: 12px;
    z-index: 3;
    padding: 4px 10px;
    border-radius: var(--r-pill);
    font-size: 10.5px; font-weight: 700;
    letter-spacing: 0.05em; text-transform: uppercase;
    background: #fff;
    color: var(--brand);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--rule);
  }
  .gpu-tag.purple { background: var(--brand); color: #fff; border-color: var(--brand); }
  .gpu-tag.orange { background: var(--orange); color: #fff; border-color: var(--orange); }
  .gpu-tag.teal   { background: var(--teal); color: #fff; border-color: var(--teal); }
  .gpu-tag.pink   { background: var(--pink); color: #fff; border-color: var(--pink); }
  .gpu-tag.amber  { background: var(--amber); color: #fff; border-color: var(--amber); }
  .gpu-tag.cyan   { background: var(--cyan); color: #fff; border-color: var(--cyan); }
  .gpu-tag.red    { background: var(--red); color: #fff; border-color: var(--red); }
  .gpu-tag.blue   { background: var(--blue); color: #fff; border-color: var(--blue); }

  /* gen indicator */
  .gpu-gen {
    position: absolute; top: 12px; right: 12px; z-index: 3;
    padding: 4px 9px;
    background: rgba(28,21,56,0.7);
    color: #fff;
    border-radius: var(--r-pill);
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px; font-weight: 700;
    letter-spacing: 0.06em;
    backdrop-filter: blur(8px);
  }

  .gpu-name {
    font-size: 20px; font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--ink);
    margin-bottom: 3px;
    line-height: 1.1;
  }
  a.gpu-name { display: block; transition: opacity .2s; }
  a.gpu-name:hover { opacity: 0.78; }
  .gpu-card.featured .gpu-name {
    background: linear-gradient(135deg, var(--brand-3) 0%, #fff 70%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .gpu-arch {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px; font-weight: 600;
    color: var(--ink-mute);
    margin-bottom: 14px;
    letter-spacing: 0.04em;
  }
  .gpu-card.featured .gpu-arch { color: rgba(255,255,255,0.55); }

  .gpu-desc {
    margin-bottom: 16px;
    flex-grow: 1;
  }
  .gpu-card.featured .gpu-desc { color: rgba(255,255,255,0.72); }
  .gpu-desc a { color: var(--brand); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: rgba(111,61,245,0.4); transition: text-decoration-color .2s; }
  .gpu-desc a:hover { text-decoration-color: var(--brand); }
  .gpu-card.featured .gpu-desc a { color: var(--brand-3); text-decoration-color: rgba(167,139,250,0.5); }
  .gpu-card.featured .gpu-desc a:hover { text-decoration-color: var(--brand-3); }
  .gpu-desc b { color: var(--ink); font-weight: 700; }
  .gpu-card.featured .gpu-desc b { color: #fff; }

  .gpu-specs {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 14px 0;
    border-top: 1px dashed var(--rule);
    border-bottom: 1px dashed var(--rule);
    margin-bottom: 16px;
  }
  .gpu-card.featured .gpu-specs { border-color: rgba(255,255,255,0.10); }
  .gpu-specs > div { display: flex; flex-direction: column; gap: 1px; }
  .gpu-spec-lbl {
    font-size: 10px; font-weight: 700;
    letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--ink-dim);
  }
  .gpu-card.featured .gpu-spec-lbl { color: rgba(255,255,255,0.45); }
  .gpu-spec-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px; font-weight: 700;
    color: var(--ink);
  }
  .gpu-card.featured .gpu-spec-val { color: #fff; }

  .gpu-btn {
    display: block; width: 100%;
    padding: 11px 16px; text-align: center;
    border-radius: var(--r-pill);
    font-weight: 700; font-size: 13px;
    background: var(--bg-tint);
    color: var(--brand);
    border: 1px solid var(--rule);
    transition: all .2s;
    margin-top: auto;
  }
  .gpu-btn:hover { background: var(--brand); color: #fff; border-color: var(--brand); }
  /* Disabled-state "Coming soon" variant for cards not yet linked */
  .gpu-btn.soon {
    background: var(--bg-tint);
    color: var(--ink-mute);
    border: 1px dashed var(--rule);
    cursor: not-allowed;
    display: flex; align-items: center; justify-content: center; gap: 7px;
  }
  .gpu-btn.soon:hover { background: var(--bg-tint); color: var(--ink-mute); border-color: var(--rule); }
  .gpu-btn.soon::before {
    content: ''; width: 6px; height: 6px; border-radius: 50%;
    background: var(--amber);
    box-shadow: 0 0 0 3px rgba(245,158,11,0.18);
  }
  .gpu-card.featured .gpu-btn {
    background: linear-gradient(135deg, var(--brand-2), var(--brand));
    color: #fff; border-color: var(--brand);
    box-shadow: 0 8px 22px var(--brand-glow);
  }
  .gpu-card.featured .gpu-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px var(--brand-glow); }

  /* ========== CTA BANNER ========== */
  .cta-banner {
    position: relative;
  }
  .cta-banner-inner {
    background: linear-gradient(150deg, #1c1538 0%, #2a1d5e 55%, #3d2072 100%);
    border-radius: var(--r-xl);
    padding: 60px 48px;
    color: #fff;
    text-align: center;
    position: relative; overflow: hidden;
    box-shadow: var(--shadow-glow);
  }
  .cta-banner-inner::before {
    content: ''; position: absolute;
    top: -40%; right: -10%;
    width: 360px; height: 360px; border-radius: 50%;
    background: radial-gradient(circle, rgba(167,139,250,0.5) 0%, transparent 60%);
    filter: blur(40px);
  }
  .cta-banner-inner::after {
    content: ''; position: absolute; inset: 0;
    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: 32px 32px;
    mask-image: radial-gradient(ellipse 70% 70% at 50% 30%, #000, transparent 75%);
    pointer-events: none;
  }
  .cta-banner-inner > * { position: relative; z-index: 1; }
  .cta-banner .eyebrow {
    background: rgba(167,139,250,0.18);
    color: var(--brand-3);
  }
  .cta-banner .eyebrow::before { background: var(--brand-3); }
  .cta-banner h2 {
    font-size: clamp(30px, 4vw, 42px);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.1;
    margin: 16px 0 14px;
  }
  .cta-banner h2 .grad {
    background: linear-gradient(135deg, var(--brand-3) 0%, #fff 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .cta-banner p {
    font-size: 15.5px; color: rgba(255,255,255,0.72);
    max-width: 820px; margin: 0 auto 32px;
    line-height: 1.65;
  }
  .cta-banner .btn-row { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
  .cta-banner .btn-ghost {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.16);
    color: #fff;
  }
  .cta-banner .btn-ghost:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.3); color: #fff; }
  .cta-trust {
    margin-top: 32px;
    display: flex; gap: 26px; justify-content: center;
    flex-wrap: wrap;
    font-size: 12.5px; color: rgba(255,255,255,0.6);
  }
  .cta-trust span { display: inline-flex; align-items: center; gap: 7px; }
  .cta-trust span::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--emerald); }

  /* ========== CAPABILITIES (multi-node training etc.) ========== */
  .cap-section {background: var(--bg); }
  .cap-grid {
    margin-top: 56px;
    display: grid; grid-template-columns: 1.3fr 1fr 1fr;
    gap: 16px;
  }
  @media (max-width: 1024px) { .cap-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 600px)  { .cap-grid { grid-template-columns: 1fr; } }
  .cap-tile {
    background: #fff;
    border: 1px solid var(--rule);
    border-radius: var(--r-xl);
    padding: 30px 28px;
    transition: transform .25s, border-color .25s, box-shadow .25s;
    position: relative; overflow: hidden;
    display: flex; flex-direction: column;
  }
  .cap-tile.span-2 { grid-column: span 2; }
  @media (max-width: 1024px) { .cap-tile.span-2 { grid-column: span 1; } }
  .cap-tile:hover { transform: translateY(-3px); border-color: var(--brand-3); box-shadow: var(--shadow-md); }
  .cap-tile.dark {
    background: linear-gradient(150deg, #1c1538 0%, #2a1d5e 60%, #3d2072 100%);
    color: #fff; border-color: #3d2680;
  }
  .cap-tile.dark::after {
    content: ''; position: absolute; inset: 0;
    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: 28px 28px;
    mask-image: radial-gradient(ellipse 60% 60% at 70% 30%, #000, transparent 75%);
    pointer-events: none;
  }
  .cap-tile > * { position: relative; z-index: 1; }
  .cap-icon {
    width: 42px; height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--brand-soft), #fff);
    border: 1px solid var(--rule);
    display: grid; place-items: center;
    color: var(--brand);
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(111,61,245,0.12);
  }
  .cap-tile.dark .cap-icon {
    background: rgba(167,139,250,0.18);
    color: var(--brand-3);
    border-color: rgba(167,139,250,0.3);
  }
  .cap-tile h3 {
    font-size: 18px; font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--ink);
    margin-bottom: 10px;
    line-height: 1.25;
  }
  .cap-tile.dark h3 { color: #fff; }
  .cap-tile.span-2 h3 { font-size: 22px; }
  .cap-tile p {
    font-size: 14px;
    color: var(--ink-mute);
    line-height: 1.65;
  }
  .cap-tile.dark p { color: rgba(255,255,255,0.72); }

  /* ========== REVEAL ========== */
  .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .55s cubic-bezier(.22,.61,.36,1), transform .55s cubic-bezier(.22,.61,.36,1);
  }
  .reveal.in { opacity: 1; transform: translateY(0); }
  .reveal:nth-child(2) { transition-delay: .08s; }
  .reveal:nth-child(3) { transition-delay: .16s; }
  .reveal:nth-child(4) { transition-delay: .24s; }

  /* ============================================================
     RESPONSIVE — mobile-first enhancements
     Breakpoints: 480px | 640px | 768px | 960px | 1024px | 1100px
  ============================================================ */

  /* ---- GLOBAL SECTION PADDING ---- */
  

  /* ---- HERO ---- */
  @media (max-width: 960px) {
    .hero { padding: 48px 20px 40px; }
    .hero-cluster { max-width: 420px; margin: 0 auto; }
  }
  @media (max-width: 640px) {
    .hero { padding: 36px 16px 32px; }
    .hero h1 { font-size: clamp(30px, 8vw, 44px); }
    .hero p.lede { font-size: 15px; }
    .hero-cta { flex-direction: column; align-items: stretch; }
    .hero-cta .btn-primary,
    .hero-cta .btn-ghost { text-align: center; justify-content: center; }
    .hero-stats { max-width: 100%; }
    .hero-pill { font-size: 11.5px;}
  }
  @media (max-width: 480px) {
    .hero { padding: 28px 16px 24px; }
    .hero h1 { font-size: clamp(26px, 9vw, 38px); }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .stat-num { font-size: 18px; }
    .hero-cluster { display: none; } /* hide visual widget on very small screens */
  }

  /* ---- BUTTONS ---- */
  @media (max-width: 480px) {
    .btn-primary,
    .btn-ghost { padding: 12px 20px; font-size: 13.5px; }
  }

  /* ---- SECTION HEADINGS ---- */
  @media (max-width: 640px) {
    h2.heading { font-size: clamp(24px, 7vw, 36px); }
    .section-head-center { margin-bottom: 36px; }
    .sub { font-size: 14.5px; }
  }

  /* ---- PRIMER GRID ---- */
  @media (max-width: 640px) {
    .primer-grid { grid-template-columns: 1fr; gap: 14px; margin-top: 36px; }
    .primer-card { padding: 24px 20px; }
    .primer-card h3 { font-size: 17px; }
  }

  /* ---- GPU CARDS ---- */
  @media (max-width: 480px) {
    .gpu-grid { grid-template-columns: 1fr; gap: 14px; }
    .gpu-card { padding: 20px 18px; }
    .gpu-name { font-size: 18px; }
    .gpu-desc { font-size: 12.5px; }
  }

  /* ---- CTA BANNER ---- */
  @media (max-width: 768px) {
    .cta-banner-inner { padding: 44px 32px; border-radius: var(--r-lg); }
    .cta-banner h2 { font-size: clamp(24px, 6vw, 36px); }
  }
  @media (max-width: 640px) {
    .cta-banner-inner { padding: 36px 24px;border-radius: 0; }
    .cta-banner p { font-size: 14px; }
    .cta-banner .btn-row { flex-direction: column; width: 100%; }
    .cta-banner .btn-row .btn-primary,
    .cta-banner .btn-row .btn-ghost { width: 100%; justify-content: center; }
    .cta-trust { gap: 14px; font-size: 12px; }
  }
  @media (max-width: 480px) {
    .cta-banner-inner { padding: 28px 18px; }
  }

  /* ---- CAPABILITIES GRID ---- */
  @media (max-width: 640px) {
    .cap-grid { grid-template-columns: 1fr; gap: 12px; margin-top: 36px; }
    .cap-tile { padding: 24px 20px; }
    .cap-tile.span-2 { grid-column: span 1; }
    .cap-tile.span-2 h3 { font-size: 18px; }
  }

  /* ---- WHY CHOOSE GRID ---- */
  @media (max-width: 480px) {
    .why-grid { grid-template-columns: 1fr; gap: 12px; margin-top: 36px; }
    .why-card { padding: 24px 20px; }
    .why-card h3 { font-size: 16px; }
  }
  @media (max-width: 640px) {
    .why-section { padding: 64px 16px; }
  }

  /* hero stat row */
  .hero-stats {
    animation: fadeUp .55s .4s cubic-bezier(.22,.61,.36,1) both;
    margin-top: 36px;
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    max-width: 620px;
  }
  @media (max-width: 640px) { .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; } }
  .stat-card {
    position: relative;
    padding: 16px;
    background:#fff;
    backdrop-filter: blur(12px);
    border: 1px solid var(--rule);
    border-radius: 18px;
    box-shadow: 0 4px 14px rgba(28,21,56,0.04);
    transition: transform .25s, box-shadow .25s, border-color .25s;
    overflow: hidden;
  }
  .stat-card:hover { transform: translateY(-3px); border-color: var(--brand-3); box-shadow: 0 12px 28px rgba(111,61,245,0.12); }
  .stat-card::before {
    content: ''; position: absolute;
    top: -30px; right: -20px;
    width: 80px; height: 80px; border-radius: 50%;
    filter: blur(28px); opacity: 0.35; pointer-events: none;
  }
  .stat-card.c1::before { background: #a78bfa; }
  .stat-card.c2::before { background: #06b6d4; }
  .stat-card.c3::before { background: #10b981; }
  .stat-card.c4::before { background: #f59e0b; }
  .stat-card > * { position: relative; z-index: 1; }
  .stat-icon {
    width: 26px; height: 26px;
    border-radius: 8px;
    display: grid; place-items: center;
    margin-bottom: 10px;
    box-shadow: 0 3px 10px rgba(28,21,56,0.06);
  }
  .stat-card.c1 .stat-icon { background: var(--brand-soft); color: var(--brand); }
  .stat-card.c2 .stat-icon { background: var(--cyan-soft); color: #0e7490; }
  .stat-card.c3 .stat-icon { background: var(--emerald-soft); color: #047857; }
  .stat-card.c4 .stat-icon { background: var(--amber-soft); color: #b45309; }
  .stat-num {
    font-size: 22px; font-weight: 800; letter-spacing: -0.03em;
    color: var(--ink); line-height: 1;
    display: flex; align-items: baseline; gap: 2px;
  }
  .stat-num .unit { font-size: 12px; color: var(--ink-mute); font-weight: 600; }
  .stat-lbl { font-size: 11.5px; color: var(--ink-mute); margin-top: 6px; font-weight: 600; }