@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-latin.woff2') format('woff2');
  font-weight: 300 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Space Grotesk';
  src: url('../fonts/space-grotesk-latin.woff2') format('woff2');
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --bg: #080d16;
  --bg-soft: #0b1220;
  --surface: #111a27;
  --card: #172334;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --brand: #00c8e8;
  --brand-dim: rgba(0, 200, 232, 0.14);
  --silver: #a8b4c4;
  --text: #f5f8fc;
  --muted: #93a2b5;
  --faint: #64748b;
  --paper: #eef2f7;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --display: 'Space Grotesk', 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --pad: clamp(20px, 4.6vw, 72px);
  --max: 1360px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: rgba(0, 200, 232, 0.25); color: #fff; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }

/* ---------- typography ---------- */
.mono {
  font-family: var(--display);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: '';
  width: 26px;
  height: 1px;
  background: var(--brand);
  opacity: 0.7;
}

h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.02em; line-height: 1.1; }
h1 { font-family: var(--display); font-size: clamp(32px, 4.2vw, 62px); font-weight: 500; letter-spacing: -0.03em; text-wrap: balance; }
h2 { font-size: clamp(26px, 3vw, 42px); }
h3 { font-size: clamp(19px, 1.6vw, 24px); }
p { margin: 0; }

.lede { color: var(--silver); font-size: clamp(15px, 1.15vw, 17px); line-height: 1.75; }
.dim { color: var(--muted); }

.sec-num {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--faint);
}

/* ---------- header ---------- */
.site-head {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  height: 74px;
  display: flex;
  align-items: center;
  background: linear-gradient(to bottom, rgba(8, 13, 22, 0.92), rgba(8, 13, 22, 0.6));
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s, background 0.4s;
}
.site-head.is-stuck {
  border-bottom-color: var(--line);
  background: rgba(8, 13, 22, 0.94);
}
.head-in {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  gap: 40px;
}
.brand-mark {
  font-family: var(--display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.34em;
  padding-right: 0.34em;
  white-space: nowrap;
}
.brand-mark span { color: var(--brand); }

.nav { display: flex; gap: 30px; margin-left: auto; }
.nav a {
  position: relative;
  font-size: 13.5px;
  color: var(--silver);
  letter-spacing: 0.02em;
  padding: 6px 0;
  transition: color 0.25s;
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--brand);
  transition: width 0.35s var(--ease);
}
.nav a:hover { color: var(--text); }
.nav a:hover::after, .nav a[aria-current]::after { width: 100%; }
.nav a[aria-current] { color: var(--text); }

.head-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--silver);
  transition: 0.3s;
}
.icon-btn:hover { color: var(--text); border-color: var(--line-strong); }
.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--display);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--faint);
  padding: 0 4px;
}
.lang-switch a { padding: 4px 2px; transition: color 0.25s; }
.lang-switch a.on, .lang-switch a:hover { color: var(--text); }
.lang-switch i { font-style: normal; color: var(--line-strong); }

.burger { display: none; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: 132px 0 0;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -12%;
  right: -8%;
  width: 62vw;
  height: 62vw;
  max-width: 900px;
  max-height: 900px;
  background: radial-gradient(circle at 50% 50%, rgba(0, 200, 232, 0.13), rgba(0, 200, 232, 0.03) 42%, transparent 68%);
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.024) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 20%, transparent 78%);
  pointer-events: none;
}
.hero-in {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  min-height: min(76vh, 700px);
  padding-bottom: 7vh;
}
.hero-copy { max-width: 640px; }
.hero h1 { margin: 26px 0 0; }
.hero h1 .thin { color: var(--silver); }
.hero-sub { margin-top: 26px; max-width: 520px; color: var(--muted); font-size: 16px; line-height: 1.8; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 50px;
  padding: 0 26px;
  border-radius: 2px;
  font-size: 13.5px;
  letter-spacing: 0.06em;
  font-weight: 500;
  transition: 0.35s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; transition: transform 0.35s var(--ease); }
.btn:hover svg { transform: translateX(4px); }
.btn-primary { background: var(--brand); color: #04121a; }
.btn-primary:hover { background: #22dcf8; box-shadow: 0 12px 40px -12px rgba(0, 200, 232, 0.6); }
.btn-ghost { border: 1px solid var(--line-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

.hero-visual { position: relative; display: grid; place-items: center; }
.bottle-stage { position: relative; display: grid; place-items: center; }
.hero-bottle {
  position: relative;
  z-index: 2;
  width: auto;
  height: min(64vh, 600px);
  max-width: 100%;
  filter: drop-shadow(0 40px 70px rgba(0, 0, 0, 0.62));
  animation: floaty 9s ease-in-out infinite;
}
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
.hero-halo {
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(0, 200, 232, 0.16);
  box-shadow: inset 0 0 90px rgba(0, 200, 232, 0.08);
}
.hero-halo::after {
  content: '';
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.hero-chips {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}
.chip {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 9px 12px;
  background: rgba(17, 26, 39, 0.82);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  min-width: 96px;
}
.chip b {
  font-family: var(--display);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.chip span { font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.chip.c1 { top: 8%; left: -186px; }
.chip.c2 { top: 44%; right: -190px; }
.chip.c3 { bottom: 8%; left: -164px; }

.hero-strip {
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.hero-strip ul {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
}
.hero-strip li {
  padding: 26px 0 26px clamp(0px, 2vw, 28px);
  border-left: 1px solid var(--line);
}
.hero-strip li:first-child { border-left: 0; padding-left: 0; }
.hero-strip b {
  display: block;
  font-family: var(--display);
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.hero-strip span { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); }

/* ---------- sections ---------- */
.section { padding: clamp(72px, 9vw, 132px) 0; position: relative; }
.section.alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: clamp(36px, 4vw, 64px);
}
.sec-head .t { max-width: 720px; }
.sec-head h2 { margin-top: 16px; }
.sec-head p { margin-top: 14px; color: var(--muted); max-width: 560px; font-size: 15px; }
.sec-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
  white-space: nowrap;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line);
  transition: 0.3s;
}
.sec-link:hover { color: var(--brand); border-color: var(--brand); }

/* ---------- series grid ---------- */
.series-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.series-card {
  position: relative;
  padding: 30px 26px 34px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-height: 260px;
  display: flex;
  flex-direction: column;
  transition: background 0.45s;
  overflow: hidden;
}
.series-card::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 2px;
  width: 0;
  background: var(--brand);
  transition: width 0.5s var(--ease);
}
.series-card:hover { background: var(--surface); }
.series-card:hover::after { width: 100%; }
.series-card .idx { font-family: var(--display); font-size: 11px; letter-spacing: 0.18em; color: var(--faint); }
.series-card .code {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--brand);
  margin-top: 22px;
}
.series-card h3 { margin-top: 10px; font-size: 19px; font-weight: 500; }
.series-card .en { font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin-top: 6px; }
.series-card p { margin-top: 16px; font-size: 13.5px; line-height: 1.7; color: var(--muted); }
.series-card .count {
  margin-top: auto;
  padding-top: 22px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--faint);
}

/* ---------- product cards ---------- */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: clamp(14px, 1.6vw, 22px);
}
.prod-card {
  position: relative;
  border: 1px solid var(--line);
  background: var(--surface);
  transition: 0.45s var(--ease);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.prod-card:hover { transform: translateY(-5px); border-color: rgba(0, 200, 232, 0.4); }
.prod-thumb {
  position: relative;
  aspect-ratio: 1 / 1.16;
  background: radial-gradient(120% 90% at 50% 12%, #ffffff 0%, #f2f5f9 46%, #e4eaf1 100%);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.prod-thumb img {
  position: absolute;
  inset: 0;
  margin: auto;
  height: 88%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 18px 22px rgba(16, 30, 48, 0.24));
  transition: transform 0.6s var(--ease);
}
.prod-card:hover .prod-thumb img { transform: translateY(-6px) scale(1.03); }
.prod-thumb .swatches {
  position: absolute;
  right: 12px;
  top: 12px;
  display: flex;
  gap: 5px;
  padding: 5px 7px;
  background: rgba(255, 255, 255, 0.78);
  border-radius: 999px;
  backdrop-filter: blur(4px);
}
.prod-thumb .swatches i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(16, 30, 48, 0.14);
}
.prod-body { padding: 20px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.prod-code {
  font-family: var(--display);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--brand);
}
.prod-name { margin-top: 8px; font-size: 16.5px; font-weight: 500; letter-spacing: -0.01em; }
.prod-en { margin-top: 4px; font-size: 11.5px; color: var(--faint); letter-spacing: 0.04em; }
.prod-specs {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.prod-specs div { display: flex; flex-direction: column; gap: 2px; }
.prod-specs b { font-family: var(--display); font-size: 15px; font-weight: 500; }
.prod-specs span { font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); }
.prod-card .go {
  position: absolute;
  right: 16px;
  top: 16px;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(16, 30, 48, 0.2);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #101e30;
  background: rgba(255, 255, 255, 0.7);
  opacity: 0;
  transition: 0.4s var(--ease);
}
.prod-card:hover .go { opacity: 1; }

/* ---------- application rows ---------- */
.app-list { border-top: 1px solid var(--line); }
.app-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 0.9fr) minmax(0, 1.1fr) 40px;
  align-items: center;
  gap: 28px;
  padding: 30px 6px;
  border-bottom: 1px solid var(--line);
  transition: 0.4s var(--ease);
}
.app-row:hover { background: rgba(255, 255, 255, 0.022); padding-left: 16px; }
.app-row .idx { font-family: var(--display); font-size: 12px; letter-spacing: 0.18em; color: var(--faint); }
.app-row h3 { font-size: clamp(18px, 1.8vw, 25px); font-weight: 500; }
.app-row .en { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin-top: 6px; }
.app-row p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.app-row .arrow { color: var(--faint); transition: 0.4s var(--ease); }
.app-row:hover .arrow { color: var(--brand); transform: translateX(6px); }

/* ---------- technology ---------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.tech-cell { background: var(--bg); padding: 30px 26px 34px; }
.tech-cell .n { font-family: var(--display); font-size: 11px; letter-spacing: 0.18em; color: var(--brand); }
.tech-cell h3 { margin-top: 20px; font-size: 17px; font-weight: 500; }
.tech-cell p { margin-top: 12px; font-size: 13.5px; line-height: 1.75; color: var(--muted); }
.tech-cell .glyph { margin-bottom: 26px; color: var(--brand); opacity: 0.85; }

/* ---------- encoding ---------- */
.encode-visual {
  display: grid;
  gap: 18px;
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(23, 35, 52, 0.85), rgba(11, 18, 32, 0.6));
}
.encode-code {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px;
  font-family: var(--display);
  font-size: clamp(30px, 4.6vw, 58px);
  letter-spacing: 0.02em;
}
.encode-code em { font-style: normal; color: var(--faint); }
.encode-code b { font-weight: 500; }
.encode-code .seg-xc { color: var(--text); }
.encode-code .seg-series { color: var(--brand); }
.encode-code .seg-feature { color: #7ee0f0; }
.encode-code .seg-fp { color: var(--silver); }
.encode-legend { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.encode-legend div { border-top: 1px solid var(--line); padding-top: 14px; }
.encode-legend b { display: block; font-family: var(--display); font-size: 12px; letter-spacing: 0.12em; color: var(--text); }
.encode-legend span { font-size: 12.5px; color: var(--muted); }

/* ---------- product detail ---------- */
.pd-hero {
  padding: 118px 0 0;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.pd-hero::before {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 60vw;
  height: 100%;
  background: radial-gradient(60% 60% at 60% 30%, rgba(0, 200, 232, 0.1), transparent 70%);
}
.pd-top {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
  padding-bottom: clamp(40px, 5vw, 68px);
  position: relative;
}
.pd-image {
  position: relative;
  height: clamp(360px, 34vw, 520px);
  background: radial-gradient(120% 90% at 50% 8%, #ffffff, #f1f4f9 52%, #e2e8f0 100%);
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.pd-image img {
  position: absolute;
  inset: 0;
  margin: auto;
  height: 88%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 30px 40px rgba(16, 30, 48, 0.3));
}
.pd-image .tag {
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--display);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #0d1a28;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(16, 30, 48, 0.12);
  padding: 5px 10px;
}
.pd-meta .code-row { display: flex; align-items: center; gap: 14px; }
.pd-meta .code { font-family: var(--display); font-size: 13px; letter-spacing: 0.2em; color: var(--brand); }
.pd-meta .divider { width: 30px; height: 1px; background: var(--line-strong); }
.pd-meta h1 { margin-top: 18px; font-size: clamp(28px, 3.6vw, 46px); }
.pd-meta .en-name {
  margin-top: 10px;
  font-family: var(--display);
  font-size: clamp(13px, 1.3vw, 16px);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.pd-meta .tagline { margin-top: 20px; color: var(--silver); font-size: 15px; }
.pd-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.pd-tags span {
  font-size: 12px;
  color: var(--silver);
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 999px;
}
.pd-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.pd-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.pd-stats div { padding: 24px 22px 28px; border-left: 1px solid var(--line); }
.pd-stats div:first-child { border-left: 0; padding-left: 0; }
.pd-stats b {
  display: block;
  font-family: var(--display);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}
.pd-stats b small { font-size: 0.42em; color: var(--muted); letter-spacing: 0.04em; margin-left: 4px; }
.pd-stats span { display: block; margin-top: 10px; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }

.pd-body { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 80px); }
.pd-block + .pd-block { margin-top: 54px; }
.pd-block > .label {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.pd-block > .label i { font-family: var(--display); font-style: normal; font-size: 11px; letter-spacing: 0.18em; color: var(--brand); }
.pd-block > .label h2 { font-size: 17px; font-weight: 500; letter-spacing: 0.02em; }
.pd-block > .label .en { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.pd-desc { font-size: 15px; line-height: 1.9; color: var(--silver); }
.pd-notes { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.pd-notes li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
}
.pd-notes li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--brand);
}
.pd-apps { display: flex; flex-wrap: wrap; gap: 10px; }
.pd-apps span {
  font-size: 13px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--silver);
}

.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr { border-bottom: 1px solid var(--line); }
.spec-table tr:first-child { border-top: 1px solid var(--line); }
.spec-table th, .spec-table td { padding: 13px 0; text-align: left; font-weight: 400; vertical-align: baseline; }
.spec-table th { width: 46%; font-size: 13px; color: var(--muted); }
.spec-table th small { display: block; font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin-top: 2px; }
.spec-table td { font-family: var(--display); font-size: 16px; letter-spacing: 0.01em; }
.spec-table td u { text-decoration: none; font-size: 11px; color: var(--faint); margin-left: 5px; letter-spacing: 0.08em; }
.spec-note { margin-top: 14px; font-size: 11.5px; color: var(--faint); line-height: 1.7; }

.info-panel { border: 1px solid var(--line); background: var(--surface); padding: 26px; }
.info-panel h4 { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); font-weight: 500; }
.info-panel dl { margin: 16px 0 0; display: grid; gap: 14px; }
.info-panel dt { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.info-panel dd { margin: 3px 0 0; font-size: 14px; color: var(--silver); }
.color-row { display: flex; gap: 7px; margin-top: 10px; }
.color-row i { width: 22px; height: 22px; border-radius: 50%; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16); }

.inquiry {
  margin-top: 22px;
  border: 1px solid rgba(0, 200, 232, 0.3);
  background: linear-gradient(160deg, rgba(0, 200, 232, 0.1), rgba(0, 200, 232, 0.02));
  padding: 26px;
}
.inquiry h4 { font-size: 15px; font-weight: 500; }
.inquiry p { margin-top: 8px; font-size: 13px; color: var(--muted); line-height: 1.7; }
.inquiry .btn { margin-top: 18px; height: 44px; }

.pd-next {
  border-top: 1px solid var(--line);
  margin-top: clamp(56px, 7vw, 96px);
  padding: 30px 0 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.pd-next .lab { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); }
.pd-next a { display: flex; align-items: center; gap: 16px; }
.pd-next strong { font-family: var(--display); font-size: 17px; font-weight: 500; letter-spacing: 0.06em; }
.pd-next em { font-style: normal; color: var(--muted); font-size: 13px; }

/* ---------- filter bar ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 0 34px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}
.filter-bar button {
  font-size: 12.5px;
  color: var(--muted);
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: 0.3s;
  letter-spacing: 0.02em;
}
.filter-bar button:hover { color: var(--text); border-color: var(--line-strong); }
.filter-bar button.on { background: var(--text); color: #08111c; border-color: var(--text); }

/* ---------- page hero (inner pages) ---------- */
.page-hero {
  padding: 132px 0 clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  left: -10%;
  top: -40%;
  width: 70vw;
  height: 70vw;
  max-width: 780px;
  max-height: 780px;
  background: radial-gradient(circle, rgba(0, 200, 232, 0.09), transparent 62%);
  pointer-events: none;
}
.page-hero h1 { font-size: clamp(32px, 4.4vw, 62px); margin-top: 22px; }
.page-hero .lede { margin-top: 22px; max-width: 640px; }
.crumb { display: flex; gap: 10px; font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.crumb a:hover { color: var(--silver); }
.crumb i { font-style: normal; opacity: 0.5; }

/* ---------- blocks ---------- */
.cols-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(28px, 4vw, 64px); }
.prose { max-width: 700px; }
.prose p { color: var(--silver); font-size: 15.5px; line-height: 1.9; }
.prose p + p { margin-top: 18px; }

.kv-list { border-top: 1px solid var(--line); }
.kv-list div { display: grid; grid-template-columns: 180px 1fr; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.kv-list dt { font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.kv-list dd { margin: 0; font-size: 14.5px; color: var(--silver); }

/* ---------- CTA ---------- */
.cta {
  position: relative;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(0, 200, 232, 0.06), transparent 70%);
  padding: clamp(64px, 8vw, 110px) 0;
  overflow: hidden;
}
.cta-in { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; align-items: center; }
.cta h2 { font-size: clamp(26px, 3.4vw, 44px); }
.cta p { margin-top: 16px; color: var(--muted); max-width: 480px; }
.cta .actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--line); padding: 64px 0 34px; background: #060a11; }
.foot-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.foot-brand .brand-mark { font-size: 20px; }
.foot-brand p { margin-top: 18px; font-size: 12.5px; color: var(--faint); line-height: 1.9; max-width: 300px; }
.foot-col h5 {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 500;
  margin: 0 0 16px;
}
.foot-col a, .foot-col p { display: block; font-size: 13px; color: var(--muted); padding: 5px 0; transition: color 0.25s; }
.foot-col a:hover { color: var(--text); }
.foot-bottom {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--faint);
  letter-spacing: 0.02em;
}

/* ---------- search overlay ---------- */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(6, 10, 17, 0.86);
  backdrop-filter: blur(14px);
  display: none;
  padding: 14vh var(--pad) 0;
}
.search-overlay.open { display: block; }
.search-box { max-width: 760px; margin: 0 auto; }
.search-box input {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  color: var(--text);
  font-family: var(--display);
  font-size: clamp(20px, 2.6vw, 30px);
  padding: 14px 0;
  outline: none;
  letter-spacing: -0.01em;
}
.search-box input::placeholder { color: var(--faint); }
.search-hint { margin-top: 14px; font-size: 12px; color: var(--faint); letter-spacing: 0.04em; }
.search-results { margin-top: 26px; max-height: 52vh; overflow: auto; }
.sr-item { display: flex; align-items: center; gap: 16px; padding: 14px 2px; border-bottom: 1px solid var(--line); }
.sr-item:hover { background: rgba(255, 255, 255, 0.03); }
.sr-item .c { font-family: var(--display); font-size: 11.5px; letter-spacing: 0.14em; color: var(--brand); min-width: 96px; }
.sr-item .n { font-size: 14px; }
.sr-item .s { margin-left: auto; font-size: 11px; color: var(--faint); letter-spacing: 0.1em; text-transform: uppercase; }
.search-close { position: absolute; top: 26px; right: var(--pad); }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-bottle { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .nav { display: none; }
  .burger { display: grid; }
  .series-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-in { grid-template-columns: 1fr; min-height: auto; gap: 40px; }
  .hero-visual { order: -1; }
  .hero-bottle { height: min(46vh, 380px); }
  .chip.c1 { left: -30px; }
  .chip.c2 { right: -30px; }
  .chip.c3 { left: -16px; }
  .pd-top { grid-template-columns: 1fr; }
  .pd-image { aspect-ratio: 4 / 3.4; }
  .pd-image img { width: 34%; }
  .pd-body { grid-template-columns: 1fr; }
  .cta-in { grid-template-columns: 1fr; }
  .cta .actions { justify-content: flex-start; }
  .foot-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .site-head { height: 64px; }
  .hero { padding-top: 104px; }
  .hero-strip ul { grid-template-columns: repeat(2, 1fr); }
  .hero-strip li:nth-child(3) { border-left: 0; padding-left: 0; }
  .hero-strip li:nth-child(3), .hero-strip li:nth-child(4) { border-top: 1px solid var(--line); }
  .series-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .pd-stats { grid-template-columns: repeat(2, 1fr); }
  .pd-stats div:nth-child(3) { border-left: 0; padding-left: 0; }
  .pd-stats div:nth-child(3), .pd-stats div:nth-child(4) { border-top: 1px solid var(--line); }
  .app-row { grid-template-columns: 40px 1fr; gap: 10px 16px; }
  .app-row p { grid-column: 2; }
  .app-row .arrow { display: none; }
  .kv-list div { grid-template-columns: 1fr; gap: 4px; }
  .sec-head { flex-direction: column; align-items: flex-start; }
  .encode-legend { grid-template-columns: repeat(2, 1fr); }
  .cols-2 { grid-template-columns: 1fr; }
  .foot-top { grid-template-columns: 1fr; }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-body { padding: 14px 14px 16px; }
  .prod-specs { gap: 10px; }
  .prod-specs b { font-size: 13px; }
}
@media (max-width: 460px) {
  .prod-grid { grid-template-columns: 1fr; }
  .pd-actions .btn, .hero-cta .btn { flex: 1 1 100%; justify-content: center; }
}

/* ---------- mobile nav ---------- */
.mnav {
  position: fixed;
  inset: 64px 0 0;
  z-index: 85;
  background: #070c14;
  padding: 18px var(--pad) 40px;
  display: none;
  overflow: auto;
}
.mnav.open { display: block; }
.mnav a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  color: var(--text);
}
.mnav a span { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.mnav .mnav-foot { margin-top: 28px; display: flex; gap: 18px; font-size: 12px; color: var(--muted); }

/* ---------- misc ---------- */
.rule { height: 1px; background: var(--line); border: 0; margin: 0; }
.note-box {
  border-left: 2px solid var(--brand);
  padding: 4px 0 4px 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
}
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill-row span {
  font-size: 12px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--silver);
}
.form-grid { display: grid; gap: 16px; }
.field { display: grid; gap: 7px; }
.field label { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.field input, .field textarea, .field select {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  padding: 12px 14px;
  border-radius: 2px;
  outline: none;
  transition: border-color 0.3s;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: rgba(0, 200, 232, 0.6); }
.field textarea { min-height: 120px; resize: vertical; }

.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 1000px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-3 { grid-template-columns: 1fr; } }

.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 1000px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-3 { grid-template-columns: 1fr; } }

.pd-body > aside { position: sticky; top: 96px; align-self: start; }
@media (max-width: 1100px) { .pd-body > aside { position: static; } }
.pd-next a.back { color: var(--silver); }
.pd-next a.back svg { width: 16px; height: 16px; transform: rotate(180deg); }
.pd-next a.forward { text-align: right; }
.micro-facts { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 26px; font-size: 11.5px; letter-spacing: .06em; color: var(--faint); }
.micro-facts span { position: relative; padding-left: 12px; }
.micro-facts span::before { content: ''; position: absolute; left: 0; top: 6px; width: 4px; height: 4px; border-radius: 50%; background: var(--brand); opacity: .7; }

.pd-body > aside { position: sticky; top: 96px; align-self: start; }
@media (max-width: 1100px) { .pd-body > aside { position: static; } }
.pd-next a.back { color: var(--silver); }
.pd-next a.back svg { width: 16px; height: 16px; transform: rotate(180deg); }
.pd-next a.forward { text-align: right; }
.micro-facts { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 26px; font-size: 11.5px; letter-spacing: .06em; color: var(--faint); }
.micro-facts span { position: relative; padding-left: 12px; }
.micro-facts span::before { content: ''; position: absolute; left: 0; top: 6px; width: 4px; height: 4px; border-radius: 50%; background: var(--brand); opacity: .7; }

/* ---------- light editorial band ---------- */
.section.light {
  background: #eef2f7;
  color: #0b1622;
  border-top: 1px solid rgba(11, 22, 34, 0.08);
  border-bottom: 1px solid rgba(11, 22, 34, 0.08);
}
.section.light .eyebrow { color: #5d6d80; }
.section.light .eyebrow::before { background: #0091ad; }
.section.light h2, .section.light h3 { color: #0b1622; }
.section.light .sec-head p, .section.light p { color: #44566a; }
.section.light .sec-link { color: #33475c; border-color: rgba(11, 22, 34, 0.18); }
.section.light .sec-link:hover { color: #00819b; border-color: #00819b; }
.section.light .tech-grid { background: rgba(11, 22, 34, 0.1); border-color: rgba(11, 22, 34, 0.1); }
.section.light .tech-cell { background: #eef2f7; }
.section.light .tech-cell .n { color: #00819b; }
.section.light .tech-cell h3 { color: #0b1622; }
.section.light .tech-cell p { color: #44566a; }
.encode-code b, .encode-code em { letter-spacing: 0.02em; }
.encode-code .seg-series { margin-right: 3px; }

/* ---------- light editorial band ---------- */
.section.light {
  background: #eef2f7;
  color: #0b1622;
  border-top: 1px solid rgba(11, 22, 34, 0.08);
  border-bottom: 1px solid rgba(11, 22, 34, 0.08);
}
.section.light .eyebrow { color: #5d6d80; }
.section.light .eyebrow::before { background: #0091ad; }
.section.light h2, .section.light h3 { color: #0b1622; }
.section.light .sec-head p, .section.light p { color: #44566a; }
.section.light .sec-link { color: #33475c; border-color: rgba(11, 22, 34, 0.18); }
.section.light .sec-link:hover { color: #00819b; border-color: #00819b; }
.section.light .tech-grid { background: rgba(11, 22, 34, 0.1); border-color: rgba(11, 22, 34, 0.1); }
.section.light .tech-cell { background: #eef2f7; }
.section.light .tech-cell .n { color: #00819b; }
.section.light .tech-cell h3 { color: #0b1622; }
.section.light .tech-cell p { color: #44566a; }
.encode-code b, .encode-code em { letter-spacing: 0.02em; }
.encode-code .seg-series { margin-right: 3px; }

@media (max-width: 780px) {
  .hero-chips { display: none; }
  .hero-halo { width: 300px; height: 300px; }
  .pd-image { height: clamp(300px, 62vw, 400px); }
  .pd-image img { height: 86%; }
}

@media (max-width: 780px) {
  .hero-chips { display: none; }
  .hero-halo { width: 300px; height: 300px; }
  .pd-image { height: clamp(300px, 62vw, 400px); }
  .pd-image img { height: 86%; }
}

/* hero refinements */
:lang(en) h1 { font-size: clamp(30px, 3.7vw, 56px); letter-spacing: -0.028em; }
.hero h1 { max-width: 15em; }
.chip { max-width: 128px; }
.chip span { font-size: 9.5px; line-height: 1.35; letter-spacing: 0.1em; }
.chip.c1 { left: -204px; }
.chip.c2 { right: -212px; }
.chip.c3 { left: -172px; }
@media (max-width: 1240px) { .hero-chips { display: none; } }

/* hero refinements */
:lang(en) h1 { font-size: clamp(30px, 3.7vw, 56px); letter-spacing: -0.028em; }
.hero h1 { max-width: 15em; }
.chip { max-width: 128px; }
.chip span { font-size: 9.5px; line-height: 1.35; letter-spacing: 0.1em; }
.chip.c1 { left: -204px; }
.chip.c2 { right: -212px; }
.chip.c3 { left: -172px; }
@media (max-width: 1240px) { .hero-chips { display: none; } }

/* chip connectors */
.chip::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 16px;
  height: 1px;
  background: rgba(255, 255, 255, 0.22);
}
.chip.c1::after, .chip.c3::after { right: -16px; }
.chip.c2::after { left: -16px; }
.pd-stats-label {
  display: flex; align-items: center; gap: 14px;
  padding-top: 26px;
}
.pd-stats-label i { font-family: var(--display); font-style: normal; font-size: 11px; letter-spacing: .18em; color: var(--brand); }
.pd-stats-label span { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--faint); }

/* chip connectors */
.chip::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 16px;
  height: 1px;
  background: rgba(255, 255, 255, 0.22);
}
.chip.c1::after, .chip.c3::after { right: -16px; }
.chip.c2::after { left: -16px; }
.pd-stats-label {
  display: flex; align-items: center; gap: 14px;
  padding-top: 26px;
}
.pd-stats-label i { font-family: var(--display); font-style: normal; font-size: 11px; letter-spacing: .18em; color: var(--brand); }
.pd-stats-label span { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--faint); }