:root {
  --bg: #070a0b;
  --panel: rgba(13, 19, 20, .84);
  --line: rgba(117, 242, 219, .16);
  --cyan: #75f2db;
  --amber: #ffb45b;
  --text: #f3f7f6;
  --muted: #9aa8a5;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { overflow-x: hidden; overflow-x: clip; scroll-behavior: smooth; }
body {
  min-width: 0;
  overflow-x: hidden;
  overflow-x: clip;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Noto Sans SC", "Noto Sans TC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background:
    radial-gradient(circle at 78% 18%, rgba(117,242,219,.10), transparent 28%),
    radial-gradient(circle at 18% 72%, rgba(255,180,91,.07), transparent 30%),
    #070a0b;
}
.blueprint {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .25;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 82%);
  mask-image: linear-gradient(to bottom, #000, transparent 82%);
}
.home-button {
  position: fixed;
  top: 20px;
  left: 20px;
  width: 48px;
  height: 48px;
  z-index: 10000;
  display: grid;
  place-items: center;
  color: rgba(255,255,255,.72);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 50%;
  background: rgba(7,10,11,.72);
  backdrop-filter: blur(12px);
  text-decoration: none;
  transition: border-color .25s, color .25s, background .25s;
}
.home-button:hover { color: #fff; border-color: var(--cyan); background: rgba(117,242,219,.09); }
.home-button svg { width: 20px; height: 20px; fill: currentColor; }
.shell { width: min(1180px, calc(100% - 48px)); margin: auto; }
.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  align-items: center;
  gap: clamp(36px, 7vw, 96px);
  padding: 100px 0 64px;
}
.eyebrow, .section-kicker {
  color: var(--cyan);
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 18px 0 24px;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: clamp(48px, 7vw, 92px);
  line-height: .96;
  letter-spacing: -.05em;
}
.hero h1 span { color: var(--cyan); }
.hero-copy { max-width: 650px; color: var(--muted); font-size: clamp(16px, 2vw, 19px); }
.metrics { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 40px; }
.metric strong { display: block; color: var(--text); font: 600 24px/1 "Space Grotesk", sans-serif; }
.metric small { color: var(--muted); font-size: 12px; letter-spacing: .08em; }
.visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-height: 620px;
  isolation: isolate;
}
#forge-canvas { width: 100%; height: 100%; display: block; }
.visual-label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 6%;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  color: rgba(255,255,255,.5);
  font: 500 10px/1 "Space Grotesk", sans-serif;
  letter-spacing: .14em;
}
.section { padding: clamp(72px, 10vw, 130px) 0; }
.section-head { display: grid; grid-template-columns: .7fr 1.3fr; gap: 40px; margin-bottom: 52px; }
.section-head h2 { font: 600 clamp(32px, 5vw, 54px)/1.08 "Space Grotesk", sans-serif; letter-spacing: -.035em; }
.section-head p { align-self: end; max-width: 650px; color: var(--muted); }
.tech-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.tech-card {
  min-width: 0;
  padding: clamp(28px, 4vw, 44px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(117,242,219,.035), transparent 55%);
  transition: background .3s, transform .3s;
}
.tech-card:hover { background: rgba(117,242,219,.075); transform: translateY(-4px); }
.card-no { color: var(--amber); font: 500 12px/1 "Space Grotesk", sans-serif; letter-spacing: .14em; }
.tech-card h3 { margin: 34px 0 14px; font: 600 20px/1.25 "Space Grotesk", Inter, sans-serif; }
.tech-card p { color: var(--muted); font-size: 14px; }
.timeline { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 54px; }
.timeline::before { content: ""; position: absolute; top: 8px; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, var(--cyan), var(--amber)); }
.step { position: relative; padding: 34px 30px 0 0; }
.step::before { content: ""; position: absolute; top: 3px; left: 0; width: 11px; height: 11px; border: 2px solid var(--bg); border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 1px var(--cyan), 0 0 18px var(--cyan); }
.step:last-child::before { background: var(--amber); box-shadow: 0 0 0 1px var(--amber), 0 0 18px var(--amber); }
.step b { font: 600 15px "Space Grotesk", sans-serif; }
.step p { margin-top: 7px; color: var(--muted); font-size: 13px; }
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.app-item { padding: 26px; border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.025); }
.app-icon { display: block; margin-bottom: 24px; color: var(--amber); font: 600 13px/1 "Space Grotesk", sans-serif; }
.app-item h3 { font-size: 17px; }
.app-item p { margin-top: 8px; color: var(--muted); font-size: 13px; }
footer { padding: 38px 20px; border-top: 1px solid var(--line); text-align: center; }
footer p, footer a { color: #fff; font-size: 13px; line-height: 1.8; text-decoration: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .tech-card { transition: none; } }
@media (max-width: 800px) {
  .shell { width: min(100% - 32px, 640px); }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 18px; padding: 108px 0 64px; }
  .hero-copy { font-size: 15px; }
  .metrics { gap: 20px; margin-top: 28px; }
  .metric strong { font-size: 20px; }
  .visual { max-width: 410px; margin: 0 auto; }
  .section-head { grid-template-columns: 1fr; gap: 18px; }
  .tech-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; gap: 24px; }
  .timeline::before { top: 0; bottom: 0; left: 5px; right: auto; width: 1px; height: auto; }
  .step { padding: 0 0 0 32px; }
  .step::before { top: 4px; }
  .app-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 46px; }
  .visual { width: calc(100% + 8px); margin-left: -4px; }
  .app-grid { grid-template-columns: 1fr; }
  .home-button { width: 44px; height: 44px; }
}