:root {
    --bg: #f5f7fc;
    --bg-soft: #eef2fa;
    --surface: #ffffff;
    --ink: #0e1430;
    --ink-2: #4a5878;
    --ink-3: #8a96b4;
    --card-bd: #e4e9f3;
    --card-bd-2: #eef1f8;
    --accent: #2f6bff;
    --accent-2: #06b6c9;
    --accent-3: #5e8bff;
    --gold: #c2870a;
    --shadow: 0 22px 60px rgba(24, 39, 95, 0.10);
    --shadow-sm: 0 8px 24px rgba(24, 39, 95, 0.07);
    --shadow-xs: 0 2px 10px rgba(24, 39, 95, 0.05);
    --radius: 20px;
    --maxw: 1180px;
    --font-sans: "Inter", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-display: "Sora", "Inter", "PingFang SC", -apple-system, BlinkMacSystemFont, "Microsoft YaHei", sans-serif;
    --font-mono: "Space Grotesk", "Inter", ui-monospace, "SF Mono", Menlo, monospace;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }

  body {
    font-family: var(--font-sans);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    cursor: none;
  }
  h1, h2, h3, h4, .section-title, .hero h1, .num, .pre-logo,
  .brand-name, .eyebrow, .nav-cta { font-family: var(--font-display); }
  .brand-name small, .iw-en, .axis-x, .sc-url, .kpi-en { font-family: var(--font-mono); }
  @media (max-width: 820px) { body { cursor: auto; } }

  a { color: inherit; text-decoration: none; }
  img { display: block; max-width: 100%; }
  ::selection { background: rgba(59, 91, 255, 0.18); color: var(--ink); }

  /* ===== Background ===== */
  .bg-layer {
    position: fixed; inset: 0; z-index: -3;
    background:
      radial-gradient(1100px 700px at 80% -10%, rgba(59, 91, 255, 0.08), transparent 60%),
      radial-gradient(900px 600px at -10% 15%, rgba(14, 165, 163, 0.06), transparent 58%),
      radial-gradient(900px 800px at 50% 120%, rgba(124, 92, 255, 0.06), transparent 62%),
      linear-gradient(180deg, #ffffff, var(--bg));
  }
  .orb {
    position: fixed; border-radius: 50%; filter: blur(80px); z-index: -2;
    opacity: 0.35; pointer-events: none; will-change: transform;
  }
  .orb.a { width: 460px; height: 460px; background: radial-gradient(circle, #6f86ff, transparent 70%); top: -140px; right: -60px; animation: float1 20s ease-in-out infinite; }
  .orb.b { width: 360px; height: 360px; background: radial-gradient(circle, #5fd6cf, transparent 70%); bottom: 6%; left: -120px; animation: float2 24s ease-in-out infinite; }
  .orb.c { width: 320px; height: 320px; background: radial-gradient(circle, #ffd27a, transparent 70%); top: 48%; left: 56%; opacity: 0.3; animation: float3 28s ease-in-out infinite; }
  @keyframes float1 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-40px,50px)} }
  @keyframes float2 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(60px,-40px)} }
  @keyframes float3 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-50px,-30px) scale(1.08)} }

  /* ===== Custom cursor ===== */
  .cursor-dot, .cursor-ring {
    position: fixed; top: 0; left: 0; border-radius: 50%;
    pointer-events: none; z-index: 9999; transform: translate(-50%, -50%);
  }
  .cursor-dot { width: 7px; height: 7px; background: var(--accent); }
  .cursor-ring {
    width: 36px; height: 36px; border: 1.5px solid rgba(59, 91, 255, 0.5);
    transition: width .25s, height .25s, background .25s, border-color .25s;
  }
  .cursor-ring.grow { width: 60px; height: 60px; background: rgba(59, 91, 255, 0.08); border-color: rgba(59,91,255,0.25); }
  @media (max-width: 820px) { .cursor-dot, .cursor-ring { display: none; } }

  /* ===== Scroll progress ===== */
  .progress {
    position: fixed; top: 0; left: 0; height: 3px; width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    z-index: 1000;
  }

  /* ===== Nav ===== */
  nav {
    position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
    width: min(94%, var(--maxw)); z-index: 900;
    display: flex; align-items: center; justify-content: space-between;
    padding: 11px 14px 11px 18px; border-radius: 999px;
    background: rgba(255, 255, 255, 0.78); border: 1px solid var(--card-bd);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-xs);
    transition: transform .4s, box-shadow .4s;
  }
  nav.scrolled { box-shadow: var(--shadow-sm); }
  nav.hide { transform: translateX(-50%) translateY(-140%); }
  .brand { display: flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: .3px; }
  .brand .logo {
    width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center;
    flex: none; overflow: hidden; box-shadow: 0 6px 16px rgba(47,107,255,0.28);
  }
  .brand .logo img { width: 100%; height: 100%; display: block; }
  .brand-name { display: flex; flex-direction: column; line-height: 1.05; }
  .brand-name small { font-size: 9px; font-weight: 700; letter-spacing: 2.5px; color: var(--ink-3); }
  .nav-links { display: flex; gap: 4px; }
  .nav-links a {
    padding: 8px 15px; border-radius: 999px; font-size: 14px; color: var(--ink-2); font-weight: 600;
    transition: color .25s, background .25s;
  }
  .nav-links a:hover { color: var(--accent); background: rgba(59,91,255,0.07); }
  .nav-cta {
    padding: 9px 18px; border-radius: 999px; font-size: 14px; font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent-3)); color: #fff;
    transition: transform .2s, box-shadow .2s;
  }
  .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(59,91,255,0.35); }
  .nav-burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; }
  .nav-burger span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s; }
  @media (max-width: 820px) {
    .nav-links { position: absolute; top: 66px; left: 0; right: 0; flex-direction: column;
      background: rgba(255,255,255,0.98); border: 1px solid var(--card-bd); border-radius: 18px;
      padding: 12px; gap: 4px; opacity: 0; pointer-events: none; transform: translateY(-12px); transition: .3s; box-shadow: var(--shadow-sm); }
    .nav-links.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
    .nav-cta { display: none; }
    .nav-burger { display: flex; }
  }

  /* ===== Layout ===== */
  section { position: relative; padding: 108px 22px; }
  .wrap { max-width: var(--maxw); margin: 0 auto; }
  .eyebrow {
    display: inline-flex; align-items: center; gap: 10px; font-size: 12.5px; font-weight: 700;
    letter-spacing: .5px; color: var(--accent); text-transform: uppercase;
    padding: 6px 14px 6px 6px; border-radius: 999px; background: rgba(59,91,255,0.06);
    border: 1px solid rgba(59,91,255,0.16); margin-bottom: 20px;
  }
  .eyebrow .eb-no {
    display: inline-grid; place-items: center; min-width: 26px; height: 26px; padding: 0 6px;
    border-radius: 999px; font-size: 12px; font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-3)); color: #fff;
  }
  .section-title { font-size: clamp(30px, 4.2vw, 52px); font-weight: 800; line-height: 1.12; letter-spacing: -1.5px; }
  .section-sub { color: var(--ink-2); margin-top: 14px; max-width: 660px; font-size: 16px; }
  .grad-text { background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

  /* ===== Hero ===== */
  .hero { min-height: 100vh; display: flex; align-items: center; padding-top: 120px; }
  .hero-grid-bg {
    position: absolute; inset: 0; z-index: -1; pointer-events: none;
    background-image:
      linear-gradient(rgba(59,91,255,0.045) 1px, transparent 1px),
      linear-gradient(90deg, rgba(59,91,255,0.045) 1px, transparent 1px);
    background-size: 46px 46px;
    -webkit-mask-image: radial-gradient(circle at 30% 40%, #000 0%, transparent 68%);
    mask-image: radial-gradient(circle at 30% 40%, #000 0%, transparent 68%);
  }
  .hero-spot {
    position: absolute; width: 520px; height: 520px; border-radius: 50%; z-index: -1;
    background: radial-gradient(circle, rgba(59,91,255,0.10), transparent 65%);
    transform: translate(-50%, -50%); pointer-events: none;
    left: 35%; top: 45%; will-change: transform;
  }
  .hero-grid { display: grid; grid-template-columns: 1.12fr 0.88fr; gap: 50px; align-items: center; width: 100%; }
  @media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } }

  .hero .tag {
    display: inline-flex; align-items: center; gap: 9px; font-size: 14px; color: var(--ink-2); font-weight: 600;
    padding: 8px 16px; border-radius: 999px; background: var(--surface); border: 1px solid var(--card-bd);
    margin-bottom: 26px; box-shadow: var(--shadow-xs);
  }
  .dot-live { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 0 rgba(14,165,163,0.6); animation: pulse 2s infinite; }
  @keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(14,165,163,.5)} 70%{box-shadow:0 0 0 9px rgba(14,165,163,0)} 100%{box-shadow:0 0 0 0 rgba(14,165,163,0)} }

  .hero h1 { font-size: clamp(46px, 7.4vw, 92px); font-weight: 800; line-height: 0.98; letter-spacing: -3px; }
  .hero h1 .line { display: block; overflow: hidden; padding: 0 4px; margin: 0 -4px; }
  .hero h1 .line span { display: inline-block; transform: translateY(110%); animation: up .9s cubic-bezier(.2,.8,.2,1) forwards; }
  .hero h1 .line:nth-child(2) span { animation-delay: .12s; }
  .hero h1 .line:nth-child(3) span { animation-delay: .24s; }
  .hero h1 .h1-dot { color: var(--accent-2); -webkit-text-fill-color: var(--accent-2); }
  @keyframes up { to { transform: translateY(0); } }

  .hero .role { font-size: clamp(17px, 2.2vw, 22px); color: var(--ink-2); margin-top: 24px; min-height: 34px; font-weight: 600; }
  .hero .role .typed { color: var(--accent); border-right: 2px solid var(--accent); padding-right: 3px; font-weight: 700; }
  .hero p.lead { color: var(--ink-2); margin-top: 18px; max-width: 560px; font-size: 16.5px; }
  .hero p.lead b { color: var(--ink); font-weight: 700; }

  .prog-chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; max-width: 580px; }
  .prog-chips span {
    font-size: 13px; font-weight: 600; color: var(--ink-2);
    padding: 7px 14px; border-radius: 999px; background: var(--surface);
    border: 1px solid var(--card-bd); box-shadow: var(--shadow-xs);
    opacity: 0; transform: translateY(10px); animation: chipIn .55s cubic-bezier(.22,1,.36,1) forwards;
    transition: color .25s, border-color .25s, transform .25s, box-shadow .25s;
  }
  .prog-chips span:hover { color: var(--accent); border-color: rgba(47,107,255,.4); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
  .prog-chips span:nth-child(1){animation-delay:.55s}.prog-chips span:nth-child(2){animation-delay:.62s}
  .prog-chips span:nth-child(3){animation-delay:.69s}.prog-chips span:nth-child(4){animation-delay:.76s}
  .prog-chips span:nth-child(5){animation-delay:.83s}.prog-chips span:nth-child(6){animation-delay:.90s}
  .prog-chips span:nth-child(7){animation-delay:.97s}
  @keyframes chipIn { to { opacity: 1; transform: translateY(0); } }

  .hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
  .btn {
    display: inline-flex; align-items: center; gap: 10px; padding: 14px 26px; border-radius: 14px;
    font-weight: 700; font-size: 15px; transition: transform .2s, box-shadow .3s, background .3s; cursor: none;
  }
  .btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-3)); color: #fff; box-shadow: 0 12px 26px rgba(59,91,255,0.30); }
  .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 18px 36px rgba(59,91,255,0.42); }
  .btn-ghost { background: var(--surface); border: 1px solid var(--card-bd); color: var(--ink); box-shadow: var(--shadow-xs); }
  .btn-ghost:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }

  .hero-stats { display: flex; gap: 34px; margin-top: 44px; flex-wrap: wrap; }
  .hero-stats .num { font-size: clamp(28px, 4vw, 40px); font-weight: 900; }
  .hero-stats .lbl { font-size: 13px; color: var(--ink-3); letter-spacing: .3px; }

  /* hero showcase (light browser mockup) */
  .hero-visual { perspective: 1200px; }
  .showcase {
    position: relative; border-radius: 22px; background: var(--surface);
    border: 1px solid var(--card-bd); box-shadow: var(--shadow);
    transform-style: preserve-3d; transition: transform .15s ease-out;
    animation: rise 1s .3s ease both; overflow: visible;
  }
  @keyframes rise { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
  .sc-top { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border-bottom: 1px solid var(--card-bd-2); }
  .sc-dots { display: flex; gap: 6px; }
  .sc-dots i { width: 11px; height: 11px; border-radius: 50%; }
  .sc-dots i:nth-child(1){background:#ff5f57}.sc-dots i:nth-child(2){background:#febc2e}.sc-dots i:nth-child(3){background:#28c840}
  .sc-url { flex: 1; font-size: 12px; color: var(--ink-3); background: var(--bg-soft); border-radius: 8px; padding: 5px 12px; text-align: center; font-weight: 600; }
  .sc-body { padding: 20px 20px 22px; }
  .sc-kpis { display: grid; grid-template-columns: repeat(3,1fr); background: var(--bg-soft); border: 1px solid var(--card-bd-2); border-radius: 14px; overflow: hidden; }
  .sc-kpi { padding: 14px 14px; position: relative; }
  .sc-kpi + .sc-kpi { border-left: 1px solid var(--card-bd); }
  .sc-kpi b { display: block; font-size: 23px; font-weight: 900; letter-spacing: -.5px; line-height: 1.1; }
  .sc-kpi small { display: block; font-size: 11.5px; color: var(--ink-3); margin-top: 3px; }
  .sc-kpi .delta { position: absolute; top: 13px; right: 13px; font-size: 10.5px; font-weight: 800; color: #0f9d68; background: rgba(15,157,104,0.10); padding: 2px 6px; border-radius: 6px; }

  .sc-panel { margin-top: 16px; border: 1px solid var(--card-bd-2); border-radius: 14px; padding: 14px 14px 8px; }
  .sc-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
  .sc-title { font-size: 13px; font-weight: 800; color: var(--ink); }
  .sc-pill { font-size: 10.5px; font-weight: 800; letter-spacing: .5px; color: var(--accent); background: rgba(47,107,255,0.08); border: 1px solid rgba(47,107,255,0.16); padding: 3px 9px; border-radius: 999px; }
  .sc-graph { width: 100%; height: auto; aspect-ratio: 440 / 150; display: block; overflow: visible; }
  .sc-graph .grid-l { stroke: var(--card-bd); stroke-width: 1; stroke-dasharray: 3 4; }
  .sc-graph .axis-x { font-size: 9px; fill: var(--ink-3); font-weight: 600; }
  .sc-graph .sc-area { fill: url(#scFill); opacity: 0; animation: areaIn 1s .9s ease forwards; }
  .sc-graph .sc-line { fill: none; stroke: url(#scStroke); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 760; stroke-dashoffset: 760; animation: drawLine 1.6s .3s cubic-bezier(.4,0,.2,1) forwards; }
  .sc-graph .sc-dot { fill: #fff; stroke: var(--accent); stroke-width: 2.4; opacity: 0; animation: dotIn .4s ease forwards; }
  .sc-graph .sc-dot.last { stroke: var(--accent); r: 5; filter: drop-shadow(0 3px 6px rgba(47,107,255,.4)); }
  @keyframes drawLine { to { stroke-dashoffset: 0; } }
  @keyframes areaIn { to { opacity: 1; } }
  @keyframes dotIn { to { opacity: 1; } }
  .sc-legend { display: flex; flex-wrap: wrap; gap: 7px 16px; margin-top: 14px; }
  .sc-legend span { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 700; color: var(--ink-2); }
  .sc-legend span::before { content: ""; width: 8px; height: 8px; border-radius: 3px; background: var(--accent); }
  .sc-legend span:nth-child(2)::before { background: var(--accent-2); }
  .sc-legend span:nth-child(3)::before { background: #0f9d68; }
  .sc-legend span:nth-child(4)::before { background: var(--gold); }

  .float-badge {
    position: absolute; padding: 10px 15px; border-radius: 13px; font-size: 13px; font-weight: 700; color: var(--ink);
    background: var(--surface); border: 1px solid var(--card-bd); box-shadow: var(--shadow-sm);
    display: flex; align-items: center; gap: 8px;
  }
  .float-badge.one { top: -16px; right: -12px; animation: bob 4s ease-in-out infinite; }
  .float-badge.two { bottom: -16px; left: -16px; animation: bob 5s ease-in-out infinite .5s; }
  @keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-9px)} }

  /* ===== Reveal ===== */
  .reveal { opacity: 0; transform: translateY(36px); transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1); }
  .reveal.in { opacity: 1; transform: none; }
  .reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; } .reveal.d3 { transition-delay: .24s; } .reveal.d4 { transition-delay: .32s; }

  /* ===== Marquee ===== */
  .marquee { overflow: hidden; padding: 24px 0; border-top: 1px solid var(--card-bd); border-bottom: 1px solid var(--card-bd); background: rgba(255,255,255,0.6); }
  .marquee-track { display: flex; gap: 56px; width: max-content; animation: scroll 30s linear infinite; }
  .marquee:hover .marquee-track { animation-play-state: paused; }
  .marquee span { font-size: clamp(17px,2.2vw,26px); font-weight: 800; color: var(--ink-3); white-space: nowrap; display: inline-flex; align-items: center; gap: 56px; }
  .marquee span::after { content: "✦"; color: var(--accent); }
  @keyframes scroll { to { transform: translateX(-50%); } }

  /* ===== About ===== */
  .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; margin-top: 50px; }
  @media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; gap: 32px; } }
  .about-card { background: var(--surface); border: 1px solid var(--card-bd); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-xs); }
  .about-card h3 { font-size: 20px; margin-bottom: 14px; }
  .about-card p { color: var(--ink-2); }
  .about-card b { color: var(--ink); }
  .fact-list { display: grid; gap: 14px; }
  .fact { display: flex; gap: 14px; align-items: flex-start; padding: 16px 18px; border-radius: 14px; background: var(--surface); border: 1px solid var(--card-bd); box-shadow: var(--shadow-xs); transition: transform .25s, box-shadow .25s; }
  .fact:hover { transform: translateX(6px); box-shadow: var(--shadow-sm); }
  .fact .ico { font-size: 22px; }
  .fact b { display: block; font-size: 15px; }
  .fact small { color: var(--ink-3); }

  /* ===== Company ===== */
  .company {
    position: relative; border-radius: 28px; padding: 48px; overflow: hidden;
    background: linear-gradient(135deg, #ffffff, #f3f6fe);
    border: 1px solid var(--card-bd); margin-top: 50px; box-shadow: var(--shadow-sm);
  }
  .company::before { content:""; position:absolute; width:320px; height:320px; right:-70px; top:-70px; border-radius:50%; background: radial-gradient(circle,rgba(59,91,255,0.10),transparent 70%); }
  .company-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; position: relative; }
  @media (max-width: 860px) { .company-grid { grid-template-columns: 1fr; } .company { padding: 32px; } }
  .company h3 { font-size: clamp(23px,3vw,32px); font-weight: 900; }
  .company .yc { font-size: 15px; color: var(--ink-2); margin-top: 16px; }
  .company-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .meta-item { padding: 18px; border-radius: 16px; background: var(--surface); border: 1px solid var(--card-bd); box-shadow: var(--shadow-xs); }
  .meta-item .t { font-size: 12px; color: var(--ink-3); letter-spacing: .5px; }
  .meta-item .v { font-size: 16px; font-weight: 800; margin-top: 6px; }

  /* ===== Cases ===== */
  .filters { display: flex; flex-wrap: wrap; gap: 10px; margin: 34px 0 38px; }
  .filter {
    padding: 9px 18px; border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--ink-2);
    background: var(--surface); border: 1px solid var(--card-bd); cursor: none; transition: .25s; box-shadow: var(--shadow-xs);
  }
  .filter:hover { color: var(--accent); }
  .filter.active { background: linear-gradient(135deg,var(--accent),var(--accent-3)); color: #fff; border-color: transparent; }

  .cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  @media (max-width: 980px) { .cases { grid-template-columns: repeat(2,1fr); } }
  @media (max-width: 640px) { .cases { grid-template-columns: 1fr; } }

  .case {
    position: relative; border-radius: 20px; overflow: hidden; background: var(--surface);
    border: 1px solid var(--card-bd); cursor: none; transform-style: preserve-3d; box-shadow: var(--shadow-xs);
    transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s, border-color .35s;
  }
  .case::before {
    content: ""; position: absolute; inset: 0; border-radius: 20px; padding: 1.5px; z-index: 6;
    background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude;
    opacity: 0; transition: opacity .35s; pointer-events: none;
  }
  .case:hover::before { opacity: 1; }
  .case:hover { box-shadow: var(--shadow); border-color: transparent; }
  .case.hide { display: none; }

  .case-cover { position: relative; aspect-ratio: 16/10; overflow: hidden; background: #0b1226; }
  .case-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top; z-index: 2; transition: transform .6s cubic-bezier(.2,.8,.2,1); }
  .case:hover .case-cover img { transform: scale(1.07); }
  .case-cover::after { content:""; position:absolute; inset:0; z-index: 3; background: linear-gradient(180deg, transparent 55%, rgba(11,18,38,0.55)); }
  .case-cat { position: absolute; top: 13px; left: 13px; z-index: 5; font-size: 12px; font-weight: 700; padding: 5px 12px; border-radius: 999px; background: rgba(255,255,255,0.92); color: var(--ink); box-shadow: var(--shadow-xs); }

  /* professional placeholder cover */
  .ph-pro {
    position: absolute; inset: 0; z-index: 1; overflow: hidden;
    background:
      radial-gradient(120% 90% at 80% 0%, var(--g1, #2a3f8f), transparent 55%),
      radial-gradient(120% 90% at 0% 100%, var(--g2, #155e75), transparent 55%),
      linear-gradient(135deg, #141d3d, #0e1430);
  }
  .ph-pro .ph-net {
    position: absolute; inset: 0; opacity: .5;
    background-image:
      linear-gradient(rgba(255,255,255,0.07) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.07) 1px, transparent 1px);
    background-size: 30px 30px;
    -webkit-mask-image: radial-gradient(circle at 50% 45%, #000, transparent 75%);
    mask-image: radial-gradient(circle at 50% 45%, #000, transparent 75%);
  }
  .ph-pro .ph-bar { position: absolute; top: 12px; left: 12px; display: flex; gap: 6px; z-index: 2; }
  .ph-pro .ph-bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,0.4); }
  .ph-pro .ph-emoji { position: absolute; right: 14px; bottom: 12px; font-size: 64px; opacity: .26; }
  .ph-pro .ph-core { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; padding: 0 22px; z-index: 2; }
  .ph-pro .ph-title { font-size: 20px; font-weight: 900; letter-spacing: -.3px; color: #fff; line-height: 1.25; max-width: 80%; text-shadow: 0 4px 18px rgba(0,0,0,.4); }
  .ph-pro .ph-stack { margin-top: 10px; font-size: 11.5px; font-weight: 700; letter-spacing: .5px; color: rgba(255,255,255,0.72); }
  .ph-pro .ph-hint { position: absolute; bottom: 11px; left: 22px; z-index: 2; font-size: 10px; font-weight: 700; letter-spacing: 1px; color: rgba(255,255,255,0.5); }

  .case-body { padding: 20px; }
  .case-body h4 { font-size: 18px; font-weight: 800; }
  .case-body p { color: var(--ink-2); font-size: 14px; margin-top: 8px; min-height: 42px; }

  .case-feats { margin-top: 14px; border-top: 1px dashed var(--card-bd); padding-top: 14px; }
  .feat-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
  .feat-head span { font-size: 12px; font-weight: 700; letter-spacing: .5px; color: var(--ink-3); }
  .feat-head b { font-size: 11px; font-weight: 800; padding: 3px 9px; border-radius: 999px; color: var(--accent-2); background: rgba(14,165,163,0.10); border: 1px solid rgba(14,165,163,0.22); }
  .feat-list-mini { display: grid; gap: 7px; }
  .feat-list-mini li { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; color: var(--ink-2); list-style: none; }
  .feat-list-mini li .ck { color: var(--accent-2); font-weight: 900; flex: none; }

  .case-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
  .case-tags span { font-size: 12px; color: var(--accent); background: rgba(59,91,255,0.06); border: 1px solid rgba(59,91,255,0.15); padding: 3px 10px; border-radius: 8px; }
  .case-price { margin-top: 16px; display: flex; align-items: center; justify-content: space-between; }
  .case-price .p { font-weight: 800; color: var(--gold); font-size: 13.5px; }
  .case-price .more { font-size: 13px; font-weight: 700; color: var(--accent); display: inline-flex; gap: 6px; align-items: center; transition: gap .25s; }
  .case:hover .case-price .more { gap: 11px; }

  /* ===== Cases · show more ===== */
  .cases-more { display: flex; justify-content: center; margin-top: 40px; }
  .more-btn {
    display: inline-flex; align-items: center; gap: 10px; cursor: none;
    padding: 13px 24px; border-radius: 999px; font-weight: 700; font-size: 15px;
    color: var(--ink); background: var(--surface); border: 1px solid var(--card-bd);
    box-shadow: var(--shadow-xs); transition: transform .25s, box-shadow .3s, border-color .3s, color .3s;
  }
  .more-btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: rgba(47,107,255,.4); color: var(--accent); }
  .more-btn .mb-count {
    font-size: 12.5px; font-weight: 800; font-family: var(--font-mono);
    color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2));
    padding: 2px 9px; border-radius: 999px; line-height: 1.6;
  }
  .more-btn .mb-count:empty { display: none; }
  .more-btn .mb-ico { width: 18px; height: 18px; transition: transform .35s cubic-bezier(.2,.8,.2,1); }
  .more-btn.is-open .mb-ico { transform: rotate(180deg); }

  /* ===== Skills ===== */
  .skill-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; margin-top: 50px; }
  @media (max-width: 900px) { .skill-grid { grid-template-columns: repeat(2,1fr); } }
  .skill { position: relative; padding: 28px 24px; border-radius: 18px; background: var(--surface); border: 1px solid var(--card-bd); box-shadow: var(--shadow-xs); transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s, border-color .35s; overflow: hidden; }
  .skill::after { content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .4s cubic-bezier(.2,.8,.2,1); }
  .skill:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
  .skill:hover::after { width: 100%; }
  .skill .ico {
    width: 54px; height: 54px; border-radius: 15px; display: grid; place-items: center; margin-bottom: 18px;
    color: var(--accent); background: linear-gradient(135deg, rgba(47,107,255,0.12), rgba(6,182,201,0.12));
    border: 1px solid rgba(47,107,255,0.16); transition: background .35s, color .35s, box-shadow .35s, transform .35s;
  }
  .skill .ico svg { width: 27px; height: 27px; }
  .skill:hover .ico { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-color: transparent; box-shadow: 0 10px 22px rgba(47,107,255,0.32); transform: scale(1.05); }
  .skill h4 { font-size: 17px; font-weight: 800; }
  .skill p { color: var(--ink-2); font-size: 13.5px; margin-top: 8px; min-height: 42px; }
  .skill-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
  .skill-tags span { font-size: 11.5px; font-weight: 600; color: var(--ink-2); background: var(--bg-soft); border: 1px solid var(--card-bd); padding: 4px 10px; border-radius: 999px; }

  /* ===== Process ===== */
  .steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-top: 50px; }
  @media (max-width: 900px) { .steps { grid-template-columns: repeat(2,1fr); } }
  .step { padding: 26px 22px; border-radius: 18px; background: var(--surface); border: 1px solid var(--card-bd); box-shadow: var(--shadow-xs); }
  .step .no { font-size: 42px; font-weight: 900; line-height: 1; background: linear-gradient(135deg,var(--accent),var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .step h4 { margin-top: 14px; font-size: 17px; }
  .step p { color: var(--ink-2); font-size: 14px; margin-top: 8px; }

  /* ===== Contact ===== */
  .contact-card {
    position: relative; border-radius: 28px; padding: 56px 48px; text-align: center; overflow: hidden;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    margin-top: 50px; box-shadow: 0 26px 60px rgba(47,107,255,0.30);
  }
  .contact-card::before { content:""; position:absolute; inset:0; background: radial-gradient(600px 300px at 80% -20%, rgba(255,255,255,0.18), transparent 60%); }
  .contact-card h2 { font-size: clamp(28px,4vw,46px); font-weight: 900; color: #fff; position: relative; }
  .contact-card p { color: rgba(255,255,255,0.88); margin-top: 16px; max-width: 540px; margin-inline: auto; position: relative; }
  .contact-actions { display: flex; gap: 14px; justify-content: center; margin-top: 30px; flex-wrap: wrap; position: relative; }
  .contact-card .btn-primary { background: #fff; color: var(--accent); box-shadow: 0 12px 26px rgba(0,0,0,0.15); }
  .contact-card .btn-ghost { background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.4); color: #fff; box-shadow: none; }
  .contact-qr { position: relative; width: max-content; margin: 34px auto 0; padding: 14px 14px 12px; background: #fff; border-radius: 20px; box-shadow: 0 18px 44px rgba(0,0,0,0.20); }
  .contact-qr img { width: 220px; height: auto; display: block; border-radius: 12px; }
  .contact-qr span { display: block; margin-top: 10px; font-size: 13px; font-weight: 700; color: var(--ink-2); }

  footer { padding: 48px 22px 60px; border-top: 1px solid var(--card-bd); background: var(--surface); }
  .foot-grid { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 18px; }
  footer .copy { color: var(--ink-3); font-size: 13px; }
  .back-top { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; background: var(--surface); border: 1px solid var(--card-bd); cursor: none; transition: .25s; box-shadow: var(--shadow-xs); }
  .back-top:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }

  /* ===== Modal ===== */
  .modal { position: fixed; inset: 0; z-index: 1200; display: none; align-items: center; justify-content: center; padding: 24px; }
  .modal.open { display: flex; }
  .modal-bg { position: absolute; inset: 0; background: rgba(14,20,48,0.45); backdrop-filter: blur(6px); animation: fade .3s ease; }
  @keyframes fade { from { opacity: 0; } to { opacity: 1; } }
  .modal-box { position: relative; max-width: 760px; width: 100%; max-height: 88vh; overflow-y: auto; border-radius: 22px; background: var(--surface); border: 1px solid var(--card-bd); box-shadow: var(--shadow); animation: pop .35s cubic-bezier(.2,.8,.2,1); }
  @keyframes pop { from { opacity: 0; transform: scale(.93) translateY(20px); } to { opacity: 1; transform: none; } }
  .modal-cover { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #0b1226; }
  .modal-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top; z-index: 2; }
  .modal-cover .ph-pro .ph-title { font-size: 26px; }
  .modal-cover .ph-pro .ph-emoji { font-size: 90px; }
  .modal-pad { padding: 28px; }
  .modal-pad h3 { font-size: 24px; font-weight: 900; }
  .modal-pad .cat { color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: .5px; margin-bottom: 10px; }
  .modal-pad > p { color: var(--ink-2); margin-top: 14px; }
  .m-group { margin-top: 22px; }
  .m-group h5 { font-size: 13px; font-weight: 800; letter-spacing: .5px; color: var(--ink); display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
  .m-group h5::before { content: ""; width: 4px; height: 14px; border-radius: 3px; background: linear-gradient(var(--accent), var(--accent-3)); }
  .m-feats { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 9px 18px; }
  @media (max-width: 560px) { .m-feats { grid-template-columns: 1fr; } }
  .m-feats li { display: flex; gap: 9px; align-items: flex-start; font-size: 14px; color: var(--ink-2); }
  .m-feats li .ck { color: var(--accent-2); font-weight: 900; flex: none; }
  .m-chips { display: flex; flex-wrap: wrap; gap: 8px; }
  .m-chips span { font-size: 12.5px; padding: 5px 12px; border-radius: 999px; }
  .m-chips.stack span { color: var(--accent); background: rgba(59,91,255,0.06); border: 1px solid rgba(59,91,255,0.18); }
  .m-chips.scenes span { color: var(--gold); background: rgba(180,105,14,0.08); border: 1px solid rgba(180,105,14,0.2); }
  .modal-close { position: absolute; top: 14px; right: 14px; width: 38px; height: 38px; border-radius: 12px; background: rgba(255,255,255,0.92); border: 1px solid var(--card-bd); display: grid; place-items: center; cursor: none; z-index: 3; transition: .25s; box-shadow: var(--shadow-xs); }
  .modal-close:hover { transform: rotate(90deg); box-shadow: var(--shadow-sm); }

  /* ===== Intro / Opening animation ===== */
  .intro {
    position: fixed; inset: 0; z-index: 3000; overflow: hidden;
    display: grid; place-items: center;
    background: radial-gradient(125% 125% at 50% 0%, #ffffff 0%, #eef3fc 55%, #e6ecfb 100%);
    clip-path: inset(0 0 0 0);
    transition: clip-path 1s cubic-bezier(.76, 0, .24, 1);
  }
  .intro.done { clip-path: inset(0 0 100% 0); pointer-events: none; }

  .intro-grid {
    position: absolute; inset: -2px; opacity: .55;
    background-image:
      linear-gradient(to right, rgba(47, 107, 255, .07) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(47, 107, 255, .07) 1px, transparent 1px);
    background-size: 46px 46px;
    -webkit-mask-image: radial-gradient(62% 62% at 50% 44%, #000 0%, transparent 78%);
    mask-image: radial-gradient(62% 62% at 50% 44%, #000 0%, transparent 78%);
    animation: introGrid 7s linear infinite;
  }
  @keyframes introGrid { to { background-position: 46px 46px; } }
  .intro-scan {
    position: absolute; left: 0; right: 0; top: 0; height: 38%;
    background: linear-gradient(to bottom, rgba(47, 107, 255, .10), transparent);
    filter: blur(6px); opacity: .9;
    animation: introScan 2.6s cubic-bezier(.65, 0, .35, 1) infinite;
  }
  @keyframes introScan { 0% { transform: translateY(-40%); opacity: 0; } 30% { opacity: .9; } 100% { transform: translateY(280%); opacity: 0; } }

  .intro-core {
    position: relative; display: grid; justify-items: center; gap: 22px;
    transition: opacity .5s ease, transform .7s cubic-bezier(.22, 1, .36, 1);
  }
  .intro.exiting .intro-core { opacity: 0; transform: translateY(-28px) scale(.96); }

  .intro-mark { position: relative; width: 132px; height: 132px; display: grid; place-items: center; }
  .mark-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
  .mark-box {
    fill: rgba(255, 255, 255, .72); stroke: url(#markG); stroke-width: 3;
    stroke-dasharray: 430; stroke-dashoffset: 430;
    filter: drop-shadow(0 18px 40px rgba(47, 107, 255, .22));
    animation: markDraw 1s cubic-bezier(.65, 0, .35, 1) .15s forwards;
  }
  @keyframes markDraw { to { stroke-dashoffset: 0; } }
  .mark-char {
    position: relative; z-index: 2; width: 72px; height: 72px; display: block;
    opacity: 0; transform: scale(.62); filter: blur(8px);
    animation: markChar .7s cubic-bezier(.22, 1, .36, 1) .55s forwards;
  }
  @keyframes markChar { to { opacity: 1; transform: scale(1); filter: blur(0); } }
  .mark-orbit {
    position: absolute; inset: -15px; border-radius: 50%;
    background: conic-gradient(from 0deg, transparent 0 62%, rgba(6, 182, 201, .55) 82%, var(--accent) 100%);
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
    mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
    opacity: 0; animation: orbitIn .6s ease .7s forwards, orbitSpin 2.4s linear .7s infinite;
  }
  @keyframes orbitIn { to { opacity: 1; } }
  @keyframes orbitSpin { to { transform: rotate(360deg); } }

  .intro-word { overflow: hidden; padding: 2px 0; }
  .iw-cn, .iw-en { display: block; text-align: center; transform: translateY(120%); animation: wordUp .8s cubic-bezier(.22, 1, .36, 1) forwards; }
  .iw-cn { font-size: 25px; font-weight: 900; letter-spacing: 2px; color: var(--ink); animation-delay: .82s; }
  .iw-en { font-size: 11px; font-weight: 700; letter-spacing: 8px; color: var(--ink-3); margin-top: 6px; animation-delay: .94s; }
  @keyframes wordUp { to { transform: translateY(0); } }

  .intro-tag { font-size: 13px; color: var(--ink-2); letter-spacing: 2px; opacity: 0; animation: fadeUp .7s ease 1.18s forwards; }
  .intro-meter { display: flex; align-items: center; gap: 12px; opacity: 0; animation: fadeUp .6s ease 1.3s forwards; }
  .im-track { width: 210px; height: 2px; border-radius: 999px; background: rgba(47, 107, 255, .14); overflow: hidden; }
  .im-track i { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
  .intro-meter b { font-size: 12px; font-weight: 800; color: var(--ink-2); font-variant-numeric: tabular-nums; min-width: 38px; }
  @keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

  @media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } .reveal { opacity: 1; transform: none; } }