/* AlgoSilicon - precision-instrument aesthetic
   Paper-white body, navy ink, cyan accent, mono numerals, provenance badges. */

:root {
  --ink: #14264D;
  --ink-soft: #3A4A6B;
  --cyan: #00B4D8;
  --cyan-deep: #0090AE;
  --paper: #F7F8FA;
  --card: #FFFFFF;
  --line: #D8DEE9;
  --navy: #0E1D3A;
  --navy-2: #142850;
  --amber: #C77D00;
  --amber-bg: #FFF4E0;
  --teal-bg: #E3F7FB;
  --mono: "IBM Plex Mono", "Courier New", monospace;
  --sans: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  --display: "Archivo", "IBM Plex Sans", "Noto Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 16.5px;
}
/* Chinese typography: denser glyphs need more breathing room everywhere
   the English design uses tight values. */
:lang(zh) body { line-height: 1.95; letter-spacing: 0.015em; }
:lang(zh) .hero h1, :lang(zh) .page-hero h1 { line-height: 1.3; letter-spacing: 0; }
:lang(zh) h2 { line-height: 1.45; }
:lang(zh) .hero p.lead, :lang(zh) .page-hero p { line-height: 1.95; }
:lang(zh) .card h3, :lang(zh) .step h3 { line-height: 1.5; }
:lang(zh) .card p, :lang(zh) .step p, :lang(zh) .sec-sub { line-height: 1.9; }
:lang(zh) .metric-strip .m .k { line-height: 1.7; margin-top: 6px; }
:lang(zh) .tile .k, :lang(zh) .tbl-note { line-height: 1.8; }
:lang(zh) table.spec th, :lang(zh) table.spec td { line-height: 1.8; padding: 13px 14px; }
:lang(zh) .trust p { line-height: 1.9; }
:lang(zh) footer a { padding: 5px 0; }

a { color: var(--cyan-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- header ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247,248,250,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 28px; height: 64px;
}
.nav .brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.nav .brand img { height: 38px; display: block; }
.nav a.nlink {
  color: var(--ink); font-weight: 500; font-size: 15px;
  padding: 6px 2px; border-bottom: 2px solid transparent;
}
.nav a.nlink:hover, .nav a.nlink.active { border-bottom-color: var(--cyan); text-decoration: none; }
.nav .dropdown { position: relative; }
.nav .dropdown > a.nlink::after { content: " \25BE"; font-size: 11px; color: var(--ink-soft); }
.nav .menu {
  position: absolute; top: 100%; left: -12px; min-width: 270px;
  background: var(--card); border: 1px solid var(--line); border-top: 2px solid var(--cyan);
  box-shadow: 0 12px 32px rgba(20,38,77,0.12);
  display: none; padding: 8px 0;
}
.nav .dropdown:hover .menu, .nav .dropdown:focus-within .menu { display: block; }
.nav .menu a {
  display: block; padding: 9px 18px; color: var(--ink); font-size: 14.5px;
}
.nav .menu a:hover { background: var(--teal-bg); text-decoration: none; }
.nav .menu a span { display: block; font-family: var(--mono); font-size: 11px; color: var(--ink-soft); }
.lang-toggle {
  font-family: var(--mono); font-size: 13px; border: 1px solid var(--line);
  padding: 5px 12px; border-radius: 3px; color: var(--ink);
  background: var(--card);
}
.lang-toggle:hover { border-color: var(--cyan); text-decoration: none; }

/* ---------- hero ---------- */
.hero {
  background:
    linear-gradient(rgba(0,180,216,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,180,216,0.05) 1px, transparent 1px),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 70%, #16335E 100%);
  background-size: 36px 36px, 36px 36px, cover;
  color: #E9EEF8;
  overflow: hidden;
}
.hero-inner {
  max-width: 1180px; margin: 0 auto; padding: 84px 24px 72px;
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px; align-items: center;
}
.hero h1 {
  font-family: var(--display); font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.08; letter-spacing: -0.5px; font-weight: 700; color: #FFFFFF;
}
.hero h1 .cy { color: var(--cyan); }
.hero p.lead { margin-top: 22px; font-size: 18.5px; color: #C2CDE3; max-width: 560px; }
.hero .cta-row { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.kicker {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--cyan); margin-bottom: 18px;
}
.btn {
  display: inline-block; padding: 12px 26px; font-weight: 600; font-size: 15.5px;
  border-radius: 3px; border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--cyan); color: #07243B; }
.btn-primary:hover { background: #2BC9E8; }
.btn-ghost { border-color: rgba(233,238,248,0.45); color: #E9EEF8; }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-ink { background: var(--ink); color: #fff; }
.btn-ink:hover { background: #1E3463; }
.btn-line { border-color: var(--ink); color: var(--ink); }
.btn-line:hover { border-color: var(--cyan-deep); color: var(--cyan-deep); }

/* animated quantize wave: draw-in, then glow + traveling pulse + scope sweep */
.wavebox { position: relative; }
.wavebox svg { width: 100%; height: auto; display: block; }
.wavebox .draw {
  stroke-dasharray: 760; stroke-dashoffset: 760;
  animation: drawwave 2.6s cubic-bezier(.6,.05,.3,1) 0.3s forwards;
}
@keyframes drawwave { to { stroke-dashoffset: 0; } }
.wavebox .wave-glow {
  opacity: 0;
  animation: glowin 1.2s ease 2.6s forwards, glowpulse 3.4s ease-in-out 3.8s infinite;
}
@keyframes glowin { to { opacity: 0.5; } }
@keyframes glowpulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.22; }
}
.wavebox .pulse {
  opacity: 0;
  animation: dotin 0.4s ease 3s forwards;
}
.wavebox .pulse2 { animation-delay: 5.25s; }
@keyframes dotin { to { opacity: 1; } }
.wavebox .sweep {
  animation: sweepmove 5.5s linear 3s infinite;
  opacity: 0;
}
@keyframes sweepmove {
  0% { transform: translateX(-70px); opacity: 0; }
  8% { opacity: 1; }
  92% { opacity: 1; }
  100% { transform: translateX(420px); opacity: 0; }
}
.wavebox .gridline { stroke: rgba(0,180,216,0.18); stroke-width: 1; }
.wavebox .gridline.blink { animation: gridblink 4s ease-in-out infinite; }
@keyframes gridblink {
  0%, 100% { stroke: rgba(0,180,216,0.18); }
  50% { stroke: rgba(0,180,216,0.34); }
}
.wavebox .axis-label {
  font-family: var(--mono); font-size: 11px; fill: rgba(194,205,227,0.7);
}
@media (prefers-reduced-motion: reduce) {
  .wavebox .draw { animation: none; stroke-dashoffset: 0; }
  .wavebox .wave-glow { animation: none; opacity: 0.4; }
  .wavebox .pulse, .wavebox .sweep { display: none; }
  .wavebox .gridline.blink { animation: none; }
}

/* hero metric strip */
.metric-strip {
  border-top: 1px solid rgba(0,180,216,0.25);
  background: rgba(7,18,40,0.55);
}
.metric-strip .row {
  max-width: 1180px; margin: 0 auto; padding: 22px 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.metric-strip .m .v {
  font-family: var(--mono); font-size: 27px; font-weight: 600; color: #fff;
}
.metric-strip .m .v small { font-size: 15px; color: #9FB1D1; }
.metric-strip .m .k { font-size: 13px; color: #9FB1D1; margin-top: 2px; }

/* ---------- provenance badges ---------- */
.badge {
  display: inline-block; font-family: var(--mono); font-size: 10px;
  letter-spacing: 1px; padding: 2px 7px; border-radius: 2px;
  vertical-align: middle; margin-left: 8px; position: relative; top: -2px;
}
.badge.measured { background: var(--teal-bg); color: var(--cyan-deep); border: 1px solid #BCE8F2; }
.badge.target { background: var(--amber-bg); color: var(--amber); border: 1px solid #F4DCAE; }
.badge.dev { background: #EDE9FE; color: #5B4BB7; border: 1px solid #D8D0F5; }

/* ---------- sections ---------- */
section { padding: 76px 0; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.sec-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 14px; }
.sec-num { font-family: var(--mono); font-size: 14px; color: var(--cyan-deep); letter-spacing: 2px; }
h2 { font-family: var(--display); font-size: clamp(26px, 3vw, 36px); letter-spacing: -0.3px; }
.sec-sub { color: var(--ink-soft); max-width: 720px; margin-bottom: 42px; font-size: 17px; }
.alt { background: #EEF1F6; }

/* product cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--cyan);
  padding: 28px 26px 24px; display: flex; flex-direction: column;
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(20,38,77,0.10); }
.card h3 { font-family: var(--display); font-size: 21px; margin-bottom: 6px; }
.card .tagline { font-family: var(--mono); font-size: 12px; color: var(--cyan-deep); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 14px; }
.card p { font-size: 15px; color: var(--ink-soft); flex: 1; }
.card .stats { margin: 18px 0 16px; border-top: 1px dashed var(--line); padding-top: 14px; display: grid; gap: 7px; }
.card .stat { display: flex; justify-content: space-between; font-size: 14px; }
.card .stat .sv { font-family: var(--mono); font-weight: 600; }
.card a.more { font-weight: 600; font-size: 14.5px; }
.card a.more::after { content: " \2192"; }

/* spec tables */
table.spec { width: 100%; border-collapse: collapse; background: var(--card); font-size: 15px; }
table.spec th, table.spec td { border: 1px solid var(--line); padding: 11px 14px; text-align: left; }
table.spec th { background: var(--ink); color: #fff; font-weight: 600; font-size: 14px; }
table.spec td.num { font-family: var(--mono); }
table.spec tr:nth-child(even) td { background: #FAFBFD; }
table.spec .win { color: var(--cyan-deep); font-weight: 600; }
.tbl-note { font-size: 13.5px; color: var(--ink-soft); margin-top: 10px; }

/* page hero (interior pages) */
.page-hero { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%); color: #E9EEF8; padding: 58px 0 46px; }
.page-hero h1 { font-family: var(--display); font-size: clamp(28px, 3.6vw, 44px); color: #fff; }
.page-hero p { margin-top: 12px; color: #C2CDE3; max-width: 760px; font-size: 17.5px; }

/* big metric tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.tile { background: var(--card); border: 1px solid var(--line); padding: 24px 22px; }
.tile .v { font-family: var(--mono); font-size: 32px; font-weight: 700; color: var(--ink); }
.tile .v small { font-size: 16px; color: var(--ink-soft); font-weight: 400; }
.tile .k { font-size: 14px; color: var(--ink-soft); margin-top: 4px; }

/* process steps (services) */
.steps { counter-reset: step; display: grid; gap: 0; border-left: 2px solid var(--cyan); margin-left: 10px; }
.step { position: relative; padding: 0 0 38px 36px; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; left: -23px; top: -2px;
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  background: var(--cyan); color: #07243B; padding: 4px 8px; border-radius: 2px;
}
.step h3 { font-family: var(--display); font-size: 19px; margin-bottom: 6px; }
.step p { color: var(--ink-soft); font-size: 15.5px; max-width: 740px; }

/* two-col feature */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.split .img-frame { border: 1px solid var(--line); background: var(--card); padding: 14px; }
.split .img-frame img { width: 100%; display: block; }

/* trust banner */
.trust {
  background: var(--navy); color: #E9EEF8; border-left: 6px solid var(--cyan);
  padding: 30px 34px; display: flex; gap: 24px; align-items: center; flex-wrap: wrap;
}
.trust .t-title { font-family: var(--display); font-size: 21px; color: #fff; }
.trust p { color: #C2CDE3; font-size: 15.5px; max-width: 820px; }

/* contact form */
form.inquiry { display: grid; gap: 16px; max-width: 640px; }
form.inquiry label { font-weight: 600; font-size: 14.5px; }
form.inquiry input, form.inquiry select, form.inquiry textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 3px;
  font-family: var(--sans); font-size: 15.5px; background: var(--card); color: var(--ink);
}
form.inquiry input:focus, form.inquiry select:focus, form.inquiry textarea:focus {
  outline: 2px solid var(--cyan); border-color: var(--cyan);
}

/* footer */
footer { background: var(--navy); color: #9FB1D1; padding: 52px 0 36px; margin-top: 0; }
footer .cols { max-width: 1180px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 34px; }
footer img.flogo { height: 40px; margin-bottom: 14px; }
footer h4 { color: #fff; font-size: 14.5px; margin-bottom: 12px; font-family: var(--display); }
footer a { color: #9FB1D1; display: block; font-size: 14px; padding: 3px 0; }
footer a:hover { color: var(--cyan); }
footer .fineprint { max-width: 1180px; margin: 36px auto 0; padding: 18px 24px 0; border-top: 1px solid rgba(159,177,209,0.25); font-size: 12.5px; }

@media (max-width: 880px) {
  .hero-inner, .split { grid-template-columns: 1fr; }
  .metric-strip .row { grid-template-columns: repeat(2, 1fr); }
  footer .cols { grid-template-columns: 1fr 1fr; }
  .nav { gap: 16px; overflow-x: auto; }
}