:root {
  --ink: #f7f8fa;
  --muted: #aeb7c3;
  --line: rgba(255, 255, 255, 0.12);
  --night: #080b10;
  --night-2: #101720;
  --amber: #ff7a1a;
  --amber-soft: #ffc07c;
  --blue: #86bfff;
  --max: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--night);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.grain {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  height: 82px;
  padding: 0 max(28px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid transparent;
  transition: background .35s ease, border-color .35s ease, backdrop-filter .35s ease;
}

.site-header.scrolled {
  background: rgba(8, 11, 16, .72);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.brand img, footer img {
  width: 166px;
  filter: invert(1) grayscale(1) brightness(2);
}

nav { display: flex; align-items: center; gap: 30px; }
nav a { color: #c8cfd8; font-size: .84rem; letter-spacing: .08em; }
nav a:hover { color: white; }
.nav-cta { border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; }

.hero {
  min-height: 100vh;
  padding: 132px max(28px, calc((100vw - var(--max)) / 2)) 40px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  grid-template-rows: 1fr auto;
  align-items: center;
  gap: 56px;
  position: relative;
  background:
    radial-gradient(circle at 80% 28%, rgba(50, 113, 179, .22), transparent 32%),
    radial-gradient(circle at 59% 72%, rgba(255, 108, 15, .12), transparent 26%),
    linear-gradient(145deg, #090c11 0%, #111924 58%, #07090d 100%);
}

.hero::after {
  content: "221";
  position: absolute;
  right: -1vw;
  top: 7vh;
  font-size: clamp(13rem, 28vw, 32rem);
  font-weight: 750;
  line-height: 1;
  letter-spacing: -.09em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,.06);
  pointer-events: none;
}

.hero-copy { position: relative; z-index: 2; max-width: 620px; }
.eyebrow, .section-kicker {
  margin: 0 0 22px;
  font-size: .78rem;
  letter-spacing: .19em;
  color: #9aa5b2;
  font-weight: 650;
}
.eyebrow span { color: var(--amber-soft); }
.hero h1 {
  margin: 0;
  font-size: clamp(3.4rem, 6.4vw, 6.8rem);
  line-height: .99;
  letter-spacing: -.07em;
  font-weight: 580;
}
.hero-en {
  margin: 30px 0 0;
  color: var(--amber-soft);
  font: italic 400 clamp(1.55rem, 2.3vw, 2.55rem)/1.1 Georgia, serif;
}
.hero-lede { max-width: 540px; margin: 28px 0 0; color: var(--muted); font-size: 1.05rem; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 38px; }
.primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  border-radius: 4px;
  background: var(--amber);
  color: #111;
  font-weight: 760;
  letter-spacing: .01em;
  transition: transform .25s ease, box-shadow .25s ease;
}
.primary:hover { transform: translateY(-2px); box-shadow: 0 14px 38px rgba(255,122,26,.28); }
.text-link { color: #dce1e7; border-bottom: 1px solid #64707c; padding: 8px 0; }

.hero-visual { position: relative; z-index: 2; min-height: 680px; display: grid; place-items: center; }
.product-stage {
  width: min(100%, 650px);
  margin: 0;
  position: relative;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 32px;
  overflow: hidden;
  background: #101720;
  box-shadow: 0 52px 110px rgba(0,0,0,.48);
  transform: rotate(1.2deg);
}
.product-stage img { width: 100%; aspect-ratio: 16 / 19; object-fit: cover; }
.product-stage figcaption {
  position: absolute;
  inset: auto 22px 20px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 15px;
  border-top: 1px solid rgba(255,255,255,.22);
  color: #e5eaf0;
  font-size: .78rem;
  letter-spacing: .07em;
}
.product-stage figcaption span { color: #9ca8b6; }
.orbit { position: absolute; border: 1px solid rgba(117,175,238,.2); border-radius: 50%; }
.orbit-a { width: 620px; height: 620px; animation: spin 24s linear infinite; }
.orbit-b { width: 460px; height: 460px; border-color: rgba(255,132,45,.22); animation: spin 18s linear infinite reverse; }
.orbit::after { content: ""; position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--amber); top: 11%; left: 18%; box-shadow: 0 0 28px var(--amber); }
@keyframes spin { to { transform: rotate(360deg); } }

.hotspot {
  position: absolute;
  min-width: 156px;
  padding: 12px 16px;
  background: rgba(9,13,19,.78);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  border-radius: 8px;
  box-shadow: 0 20px 50px rgba(0,0,0,.35);
}
.hotspot b, .hotspot span { display: block; }
.hotspot b { color: white; font-size: .94rem; }
.hotspot span { color: #9da8b5; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.hotspot-a { left: -24px; top: 26%; }
.hotspot-b { right: -25px; bottom: 22%; }

.hero-footer {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}
.hero-footer div { padding: 22px 28px 0 0; display: flex; gap: 16px; align-items: baseline; }
.hero-footer small { color: var(--amber); }
.hero-footer strong { font-size: .9rem; letter-spacing: .05em; }

.statement {
  max-width: 1080px;
  margin: 0 auto;
  padding: 160px 28px 120px;
  text-align: center;
}
.statement h2, .product-lab h2, .applicator-copy h2, .specs h2, .closing h2 {
  margin: 0;
  font-size: clamp(2.6rem, 5.1vw, 5.6rem);
  line-height: 1.08;
  letter-spacing: -.055em;
  font-weight: 560;
}
.statement > p:last-child { max-width: 720px; margin: 30px auto 0; color: var(--muted); font-size: 1.1rem; }

.feature-grid {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 150px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.feature-card {
  min-height: 470px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(160deg, rgba(255,255,255,.065), rgba(255,255,255,.018));
  position: relative;
  overflow: hidden;
}
.feature-large { grid-column: 1 / -1; min-height: 520px; display: flex; align-items: flex-end; }
.feature-number { position: absolute; top: 28px; right: 30px; color: #6d7885; font-size: .78rem; }
.feature-copy { max-width: 570px; position: relative; z-index: 2; }
.feature-card h3 { margin: 0 0 18px; font-size: clamp(2.2rem, 4vw, 4.4rem); letter-spacing: -.05em; line-height: 1.06; }
.feature-card p:not(.section-kicker) { max-width: 480px; color: var(--muted); }
.airless-visual { position: absolute; width: 420px; height: 420px; right: 8%; top: 10%; border-radius: 50%; border: 1px solid rgba(126,185,249,.28); }
.pulse { position: absolute; inset: 18%; border: 1px solid rgba(126,185,249,.26); border-radius: 50%; animation: pulse 3s ease-out infinite; }
.pulse-two { animation-delay: 1.5s; }
.core-line { position: absolute; width: 2px; height: 64%; left: 50%; top: 18%; background: linear-gradient(transparent, var(--blue), transparent); box-shadow: 0 0 20px var(--blue); }
@keyframes pulse { from { transform: scale(.6); opacity: 0; } 45% { opacity: 1; } to { transform: scale(1.5); opacity: 0; } }
.valve-mark { position: absolute; right: 40px; bottom: 34px; width: 128px; height: 128px; border-radius: 50%; border: 1px solid var(--line); display: grid; place-items: center; }
.valve-mark::before, .valve-mark::after { content: ""; position: absolute; width: 54px; height: 1px; background: var(--blue); }
.valve-mark::after { transform: rotate(90deg); }
.valve-mark span { width: 38px; height: 38px; background: var(--night); border: 1px solid var(--blue); border-radius: 50%; z-index: 1; box-shadow: 0 0 28px rgba(134,191,255,.35); }
.amber-card { background: radial-gradient(circle at 80% 15%, #ffb05f, transparent 33%), linear-gradient(145deg, #f46d11, #8d2808); }
.amber-card .section-kicker, .amber-card p:not(.section-kicker) { color: rgba(255,255,255,.82); }
.refill-ring { position: absolute; width: 280px; height: 280px; right: -35px; bottom: -55px; border: 36px solid rgba(255,255,255,.15); border-radius: 50%; box-shadow: inset 0 0 0 1px rgba(255,255,255,.2); }

.product-lab {
  max-width: var(--max);
  margin: 0 auto 150px;
  padding: 70px 28px;
  min-height: 780px;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 50px;
  align-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.lab-copy > p:not(.section-kicker) { color: var(--muted); max-width: 530px; margin: 26px 0 0; }
.variant-switch { margin-top: 42px; display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.variant-switch button { background: transparent; border: 0; color: #8994a0; padding: 18px; cursor: pointer; text-align: left; transition: background .25s, color .25s; }
.variant-switch button + button { border-left: 1px solid var(--line); }
.variant-switch button span, .variant-switch button small { display: block; }
.variant-switch button small { margin-top: 4px; color: #76818d; }
.variant-switch button.active { background: #f3f5f7; color: #111821; }
.variant-switch button.active small { color: #56616d; }
.lab-visual { margin: 0; position: relative; min-height: 660px; display: grid; place-items: center; }
.lab-visual img { width: min(100%, 590px); border-radius: 28px; position: relative; z-index: 1; box-shadow: 0 46px 90px rgba(0,0,0,.38); transition: opacity .28s ease, transform .45s ease; }
.lab-visual img.swapping { opacity: .15; transform: scale(.97) rotate(-1deg); }
.lab-visual figcaption { position: absolute; z-index: 2; bottom: 24px; right: 28px; padding: 9px 13px; border-radius: 6px; background: rgba(7,10,14,.72); border: 1px solid var(--line); color: #adb7c2; font-size: .74rem; letter-spacing: .06em; }
.lab-glow { position: absolute; width: 70%; height: 75%; background: radial-gradient(circle, rgba(255,108,25,.27), transparent 64%); filter: blur(20px); }

.applicator-section {
  max-width: var(--max);
  margin: 0 auto 150px;
  padding: 0 28px;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 70px;
  align-items: center;
}
.applicator-copy > p:not(.section-kicker) { color: var(--muted); max-width: 500px; }
.applicator-copy ul { list-style: none; padding: 0; margin: 36px 0 0; border-top: 1px solid var(--line); }
.applicator-copy li { display: flex; gap: 30px; padding: 16px 0; border-bottom: 1px solid var(--line); color: #d8dde3; }
.applicator-copy li span { color: var(--amber); font-variant-numeric: tabular-nums; }
.applicator-image { margin: 0; border-radius: 28px; overflow: hidden; background: #f0f0ef; transform: rotate(-1.5deg); box-shadow: 0 38px 90px rgba(0,0,0,.36); }
.applicator-image img { width: 100%; }

.specs { padding: 145px max(28px, calc((100vw - var(--max)) / 2)); background: #eef1f4; color: #111820; }
.specs .section-kicker { color: #626e79; }
.specs-heading { max-width: 820px; }
.spec-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 80px; border-top: 1px solid #c9cfd5; border-bottom: 1px solid #c9cfd5; }
.spec-grid article { padding: 34px 28px 32px 0; min-height: 190px; }
.spec-grid article + article { border-left: 1px solid #c9cfd5; padding-left: 28px; }
.spec-grid strong { font-size: clamp(2.1rem, 3.3vw, 3.8rem); line-height: 1; letter-spacing: -.05em; font-weight: 590; }
.spec-grid span { margin-left: 7px; color: #747e88; }
.spec-grid p { margin-top: 24px; color: #6a747e; font-size: .85rem; }
.material-note { margin-top: 80px; padding: 48px; background: #111821; color: white; display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; align-items: end; border-radius: 24px; }
.material-note h3 { font-size: clamp(1.8rem, 3vw, 3.5rem); line-height: 1.1; letter-spacing: -.045em; margin: 0; }
.material-note > p { color: #aeb8c4; margin: 0; }

.closing { padding: 180px 28px; text-align: center; background: radial-gradient(circle at 50% 40%, rgba(255,119,25,.18), transparent 28%), #080b10; }
.closing .primary { margin-top: 42px; }
footer { max-width: var(--max); margin: 0 auto; padding: 38px 28px 56px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 32px; color: #77818c; font-size: .75rem; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.75,.2,1); }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  nav a:not(.nav-cta) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 126px; }
  .hero-visual { min-height: 610px; }
  .hotspot-a { left: 0; }
  .hotspot-b { right: 0; }
  .product-lab, .applicator-section { grid-template-columns: 1fr; }
  .product-lab { padding-top: 90px; }
  .lab-visual { min-height: 540px; }
  .spec-grid { grid-template-columns: 1fr 1fr; }
  .spec-grid article:nth-child(3) { border-left: 0; border-top: 1px solid #c9cfd5; }
  .spec-grid article:nth-child(4) { border-top: 1px solid #c9cfd5; }
  .material-note { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 680px) {
  .site-header { height: 68px; padding-inline: 18px; }
  .brand img { width: 132px; }
  .nav-cta { padding: 7px 11px; font-size: .72rem; }
  .hero { padding: 106px 20px 28px; gap: 30px; }
  .hero h1 { font-size: clamp(3rem, 15vw, 4.2rem); }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 12px; }
  .primary { justify-content: center; }
  .hero-visual { min-height: 470px; }
  .orbit-a { width: 430px; height: 430px; }
  .orbit-b { width: 330px; height: 330px; }
  .product-stage { border-radius: 20px; }
  .hotspot { display: none; }
  .hero-footer { grid-template-columns: 1fr; }
  .hero-footer div { border-top: 1px solid var(--line); padding: 13px 0; }
  .statement { padding: 110px 22px 80px; }
  .feature-grid { grid-template-columns: 1fr; padding-inline: 18px; }
  .feature-large { grid-column: auto; min-height: 520px; }
  .feature-card { padding: 26px; }
  .airless-visual { width: 290px; height: 290px; right: -60px; top: 10px; }
  .product-lab, .applicator-section { padding-inline: 20px; margin-bottom: 100px; }
  .variant-switch { grid-template-columns: 1fr; }
  .variant-switch button + button { border-left: 0; border-top: 1px solid var(--line); }
  .lab-visual { min-height: 420px; }
  .specs { padding: 100px 20px; }
  .spec-grid { grid-template-columns: 1fr; margin-top: 50px; }
  .spec-grid article + article { border-left: 0; border-top: 1px solid #c9cfd5; padding-left: 0; }
  .material-note { padding: 30px 24px; }
  .closing { padding: 120px 20px; }
  footer { grid-template-columns: 1fr; padding-inline: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}