/* ==========================================================================
   SPECTRATRUE · 科远光电
   Design system & site styles
   ========================================================================== */

:root {
  --ink: #0b1f33;
  --ink-2: #15324d;
  --navy: #061826;
  --navy-2: #0a2236;
  --navy-3: #0e2c44;
  --cyan: #00aeef;
  --cyan-2: #38d6ff;
  --cyan-3: #7fe3ff;
  --cyan-soft: #e6f8ff;
  --paper: #ffffff;
  --mist: #f4f8fb;
  --mist-2: #eaf2f8;
  --line: #dbe7ef;
  --line-dark: rgba(255, 255, 255, 0.12);
  --muted: #5b7185;
  --muted-2: #7d92a4;
  --amber: #ffb547;
  --green: #21c08b;
  --font-sans: "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  --font-display: "Segoe UI Semibold", "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --shadow-sm: 0 1px 2px rgba(11, 31, 51, 0.04), 0 4px 12px rgba(11, 31, 51, 0.04);
  --shadow-md: 0 18px 50px rgba(7, 26, 43, 0.1);
  --shadow-lg: 0 30px 80px rgba(7, 26, 43, 0.16);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --container: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 76px;
}

*, *::before, *::after { box-sizing: border-box; }

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

html, body { overflow-x: hidden; overflow-x: clip; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open { overflow: hidden; }

img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }
h1, h2, h3, h4, h5 {
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--ink);
}
h1 { font-size: clamp(2.35rem, 5.2vw, 4.6rem); }
h2 { font-size: clamp(1.85rem, 3.4vw, 2.9rem); }
h3 { font-size: clamp(1.2rem, 1.8vw, 1.5rem); }
h4 { font-size: 1.08rem; }
strong { font-weight: 700; }
code, pre { font-family: "Cascadia Code", Consolas, monospace; }

::selection { background: var(--cyan); color: #fff; }

:focus-visible {
  outline: 3px solid rgba(0, 174, 239, 0.55);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 20px;
  z-index: 999;
  padding: 12px 18px;
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}
.container--narrow { width: min(880px, calc(100% - 48px)); }

.section { padding: 104px 0; position: relative; }
.section--tight { padding: 76px 0; }
.section--mist { background: var(--mist); }
.section--dark { background: var(--navy); color: #dbe8f2; }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: #fff; }
.section--dark .eyebrow { color: var(--cyan-3); }
.section--dark p { color: #a9c0d2; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 48px;
}
.section-head__text { max-width: 720px; }
.section-head h2 { margin-bottom: 12px; }
.section-head p { color: var(--muted); margin: 0; font-size: 1.02rem; }
.section-head--center { display: block; text-align: center; margin-inline: auto; }
.section-head--center .eyebrow { justify-content: center; }
.section-head--center p { margin-inline: auto; }

.lead { font-size: 1.1rem; color: var(--muted); line-height: 1.8; }
.muted { color: var(--muted); }
.small { font-size: 0.86rem; }
.mono { font-variant-numeric: tabular-nums; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn .arrow { width: 16px; height: 16px; transition: transform 0.25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }
.btn--primary {
  background: var(--cyan);
  color: #fff;
  box-shadow: 0 10px 26px rgba(0, 174, 239, 0.28);
}
.btn--primary:hover { background: #0099d2; box-shadow: 0 14px 32px rgba(0, 174, 239, 0.34); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: var(--ink-2); }
.btn--ghost {
  background: transparent;
  color: inherit;
  border-color: rgba(255, 255, 255, 0.28);
}
.btn--ghost:hover { border-color: var(--cyan-3); color: var(--cyan-3); }
.btn--outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn--outline:hover { border-color: var(--cyan); color: var(--cyan); }
.btn--sm { min-height: 40px; padding: 0 18px; font-size: 0.84rem; }
.btn--lg { min-height: 56px; padding: 0 30px; font-size: 0.98rem; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--cyan);
  transition: gap 0.25s var(--ease);
}
.link-arrow:hover { gap: 13px; }
.link-arrow svg { width: 16px; height: 16px; }

/* Header */
.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: var(--header-h);
  color: #fff;
  transition: background 0.3s, color 0.3s, box-shadow 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}
.site-header--overlay { background: transparent; }
.site-header--solid {
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  border-bottom-color: var(--line);
  backdrop-filter: saturate(180%) blur(14px);
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(7, 26, 43, 0.06);
  backdrop-filter: saturate(180%) blur(14px);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 26px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand__mark { width: 40px; height: 40px; flex: 0 0 auto; }
.brand--logo { gap: 0; }
.brand__logo {
  height: 42px;
  width: auto;
  max-width: 150px;
  border-radius: 5px;
  display: block;
}
.site-footer .brand__logo { height: 44px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__en {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.09em;
}
.brand__zh {
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  opacity: 0.72;
  margin-top: 5px;
}

.nav { margin-left: auto; }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0.86;
  transition: background 0.2s, opacity 0.2s, color 0.2s;
}
.nav__link:hover { opacity: 1; background: rgba(255, 255, 255, 0.1); }
.site-header--solid .nav__link:hover,
.site-header.is-scrolled .nav__link:hover { background: var(--mist); }
.nav__link.is-active { opacity: 1; color: var(--cyan); }
.nav__caret { width: 10px; height: 10px; opacity: 0.6; }

.nav-item { position: relative; }
.nav-item.has-menu::after {
  content: "";
  position: absolute;
  left: -12px;
  right: -12px;
  top: 100%;
  height: 18px;
  z-index: 1;
}
.mega {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  width: 620px;
  padding: 18px;
  transform: translate(-50%, 8px);
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  z-index: 3;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s, transform 0.22s, visibility 0.22s;
}
.nav-item:hover .mega,
.nav-item:focus-within .mega,
.nav-item.is-open .mega {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, 0);
}
.mega__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.mega__link {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  padding: 11px 12px;
  border-radius: 12px;
  transition: background 0.2s;
}
.mega__link:hover { background: var(--mist); }
.mega__icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--cyan-soft);
  color: var(--cyan);
  flex: 0 0 auto;
}
.mega__icon svg { width: 18px; height: 18px; }
.mega__title { font-size: 0.88rem; font-weight: 700; line-height: 1.35; }
.mega__desc { font-size: 0.74rem; color: var(--muted-2); line-height: 1.4; margin-top: 2px; }

.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  opacity: 0.8;
  transition: opacity 0.2s, border-color 0.2s, color 0.2s;
}
.lang-switch:hover { opacity: 1; color: var(--cyan); border-color: var(--cyan); }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: inherit;
  padding: 0;
  place-items: center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
  position: relative;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span::after { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero {
  position: relative;
  min-height: 880px;
  padding: 148px 0 86px;
  background: var(--navy);
  color: #fff;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero__bg { position: absolute; inset: 0; pointer-events: none; }
.hero__bg::before {
  content: "";
  position: absolute;
  width: 900px;
  height: 900px;
  right: -260px;
  top: -360px;
  background: radial-gradient(circle, rgba(0, 174, 239, 0.3), rgba(0, 174, 239, 0) 62%);
  filter: blur(8px);
}
.hero__bg::after {
  content: "";
  position: absolute;
  width: 700px;
  height: 700px;
  left: -320px;
  bottom: -420px;
  background: radial-gradient(circle, rgba(0, 120, 180, 0.24), rgba(0, 120, 180, 0) 65%);
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 86%);
}
.hero__spectrum {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 220px;
  width: 100%;
  opacity: 0.9;
}
.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 64px;
  align-items: center;
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}
.hero__copy { max-width: 660px; }
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cyan-3);
}
.hero__eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--cyan);
}
.hero h1 {
  color: #fff;
  font-size: clamp(2.7rem, 5.4vw, 5rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
}
.hero h1 em { font-style: normal; color: var(--cyan-3); }
html[lang="en"] .hero h1 { font-size: clamp(2.6rem, 4.3vw, 4.1rem); letter-spacing: -0.03em; }
.hero__sub {
  max-width: 590px;
  font-size: 1.08rem;
  line-height: 1.85;
  color: #a9c0d2;
  margin-bottom: 34px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 42px; }
.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px 30px;
  color: #8fa8ba;
  font-size: 0.8rem;
}
.hero__meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero__meta svg { width: 15px; height: 15px; color: var(--cyan); }

.hero__visual { position: relative; }
.hero-card {
  position: relative;
  padding: 16px;
  background: #fff;
  border-radius: 26px;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.36);
  transform: rotate(1.2deg);
}
.hero-card__media {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: #fff;
  aspect-ratio: 16 / 9;
}
.hero-card__media img { width: 100%; height: 100%; object-fit: contain; }
.hero-card__badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 7px 12px;
  background: rgba(6, 24, 38, 0.78);
  color: #fff;
  border-radius: 999px;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  backdrop-filter: blur(6px);
}
.hero-card__caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 6px 4px;
  color: var(--ink);
}
.hero-card__caption strong { display: block; font-size: 0.95rem; }
.hero-card__caption small { color: var(--muted); font-size: 0.74rem; }
.hero-card__caption .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px rgba(33, 192, 139, 0.14); }
.hero-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 15px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
  font-size: 0.78rem;
  font-weight: 700;
  backdrop-filter: blur(8px);
}
.hero-chip strong { color: var(--cyan); font-size: 1.02rem; }
.hero-chip--a { left: -28px; top: -26px; transform: rotate(-2deg); }
.hero-chip--b { right: -14px; bottom: -18px; transform: rotate(2deg); }
.hero-chip svg { width: 20px; height: 20px; color: var(--cyan); }

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: #7891a5;
  font-size: 0.64rem;
  letter-spacing: 0.2em;
}
.scroll-cue::after {
  content: "";
  width: 1px;
  height: 42px;
  background: linear-gradient(var(--cyan), transparent);
  animation: cue 2s infinite;
}
@keyframes cue {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
}

/* Stats */
.stats { background: #fff; border-bottom: 1px solid var(--line); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 34px 28px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 8px;
}
.stat__num span { color: var(--cyan); font-size: 0.55em; }
.stat__label { font-size: 0.82rem; color: var(--muted); letter-spacing: 0.02em; }

/* Cards & grids */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.category-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s, border-color 0.35s;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 174, 239, 0.35);
}
.category-card__media {
  position: relative;
  height: 168px;
  background: linear-gradient(135deg, #eef7fc, #dfeef7);
  overflow: visible;
}
.category-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.category-card:hover .category-card__media img { transform: scale(1.05); }
.category-card__icon {
  position: absolute;
  z-index: 2;
  left: 18px;
  bottom: -20px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: #fff;
  color: var(--cyan);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
}
.category-card__icon svg { width: 23px; height: 23px; }
.category-card__body { padding: 34px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.category-card__title { font-size: 1.02rem; margin-bottom: 6px; }
.category-card__desc { font-size: 0.82rem; color: var(--muted); line-height: 1.6; margin-bottom: 16px; flex: 1; }
.category-card__link { display: inline-flex; align-items: center; gap: 7px; font-size: 0.78rem; font-weight: 700; color: var(--cyan); margin-top: auto; }
.category-card__link svg { width: 14px; height: 14px; }

.product-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s, border-color 0.35s;
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(0, 174, 239, 0.35); }
.product-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #f1f6f9;
  overflow: hidden;
}
.product-card__media img { width: 100%; height: 100%; object-fit: contain; padding: 14px; transition: transform 0.5s var(--ease); }
.product-card:hover .product-card__media img { transform: scale(1.035); }
.product-card__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 5px 9px;
  border-radius: 6px;
  background: rgba(6, 24, 38, 0.8);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.product-card__body { padding: 18px 18px 20px; display: flex; flex-direction: column; flex: 1; }
.product-card__model { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.14em; color: var(--cyan); margin-bottom: 6px; }
.product-card__title { font-size: 1rem; margin-bottom: 7px; line-height: 1.4; }
.product-card__desc { font-size: 0.8rem; color: var(--muted); line-height: 1.6; margin-bottom: 14px; flex: 1; }
.product-card__meta { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 5px;
  background: var(--mist);
  color: var(--ink-2);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.chip--cyan { background: var(--cyan-soft); color: #007da8; }

/* Featured dark section */
.feature-dark { background: var(--navy); color: #dbe8f2; overflow: hidden; }
.feature-dark__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.feature-dark__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #0d273c;
  box-shadow: var(--shadow-lg);
}
.feature-dark__media img { width: 100%; height: 100%; object-fit: cover; }
.feature-dark__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(6, 24, 38, 0.65));
}
.feature-dark h2 { color: #fff; }
.feature-dark p { color: #a9c0d2; }
.spec-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 34px; margin: 28px 0 34px; }
.spec-list__item { padding: 15px 0; border-top: 1px solid var(--line-dark); }
.spec-list__item dt { font-size: 0.7rem; color: #7f9aaf; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 4px; }
.spec-list__item dd { margin: 0; font-size: 0.96rem; color: #fff; font-weight: 600; }
.feature-dark__actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Solutions */
.solution-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s;
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.solution-card__media { min-height: 300px; padding: 22px; background: linear-gradient(145deg, #f7fafc, #e9f1f6); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.solution-card__media img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.6s var(--ease); }
.solution-card:hover .solution-card__media img { transform: scale(1.04); }
.solution-card__body { padding: 34px 36px; display: flex; flex-direction: column; justify-content: center; }
.solution-card__num { font-size: 0.68rem; letter-spacing: 0.16em; color: var(--cyan); font-weight: 700; margin-bottom: 10px; }
.solution-card h3 { font-size: 1.35rem; margin-bottom: 10px; }
.solution-card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 18px; }
.solution-card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }

/* Technology / article cards */
.article-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s;
}
.article-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.article-card__media { aspect-ratio: 16 / 10; background: var(--mist); overflow: hidden; }
.article-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.article-card:hover .article-card__media img { transform: scale(1.04); }
.article-card__body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.article-card__meta { display: flex; gap: 10px; align-items: center; font-size: 0.68rem; color: var(--muted-2); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; }
.article-card__meta span:first-child { color: var(--cyan); font-weight: 700; }
.article-card h3 { font-size: 1.06rem; line-height: 1.45; margin-bottom: 8px; }
.article-card p { font-size: 0.82rem; color: var(--muted); line-height: 1.65; margin-bottom: 16px; flex: 1; }

/* About split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split--reverse .split__media { order: 2; }
.split__media { position: relative; }
.split__media img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.split__badge {
  position: absolute;
  right: -18px;
  bottom: 26px;
  padding: 18px 22px;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
}
.split__badge strong { display: block; font-size: 1.3rem; color: var(--ink); }
.split__badge span { font-size: 0.7rem; color: var(--muted); letter-spacing: 0.06em; }

.value-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.value-grid--4 { grid-template-columns: 1fr 1fr; }
.value {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.value__num { font-size: 0.66rem; font-weight: 700; color: var(--cyan); letter-spacing: 0.12em; margin-bottom: 7px; }
.value strong { display: block; font-size: 0.94rem; margin-bottom: 3px; }
.value span { font-size: 0.78rem; color: var(--muted); line-height: 1.5; }

/* CTA */
.cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(115deg, #071a2b 0%, #0b2b44 55%, #0d3b5c 100%);
  color: #fff;
  padding: 84px 0;
}
.cta::before {
  content: "";
  position: absolute;
  width: 640px;
  height: 640px;
  right: -160px;
  top: -300px;
  background: radial-gradient(circle, rgba(0, 174, 239, 0.36), transparent 65%);
}
.cta__inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta h2 { color: #fff; margin-bottom: 10px; }
.cta p { color: #a9c0d2; margin: 0; max-width: 620px; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 12px; flex-shrink: 0; }

/* Page hero */
.page-main { padding-top: var(--header-h); }
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 18px) 0 64px;
  background: var(--navy);
  color: #fff;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  width: 760px;
  height: 760px;
  right: -280px;
  top: -380px;
  background: radial-gradient(circle, rgba(0, 174, 239, 0.3), transparent 62%);
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000, transparent 90%);
}
.page-hero__inner { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; font-size: clamp(2.2rem, 4.4vw, 3.7rem); margin-bottom: 14px; }
.page-hero p { color: #a9c0d2; max-width: 760px; margin: 0; font-size: 1.02rem; }
.page-hero .eyebrow { color: var(--cyan-3); }
.page-hero--compact { padding: calc(var(--header-h) + 10px) 0 46px; }

.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 22px; font-size: 0.74rem; color: #7f9aaf; }
.breadcrumb a { color: #a9c0d2; transition: color 0.2s; }
.breadcrumb a:hover { color: var(--cyan-3); }
.breadcrumb svg { width: 11px; height: 11px; opacity: 0.5; }

/* Product listing */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 28px;
}
.filter-tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-tab {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.filter-tab:hover { border-color: var(--cyan); color: var(--cyan); }
.filter-tab.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }
.search-box { position: relative; flex: 0 1 300px; }
.search-box svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--muted-2); }
.search-box input {
  width: 100%;
  height: 44px;
  padding: 0 14px 0 40px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-box input:focus { border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(0, 174, 239, 0.12); }
.result-count { font-size: 0.8rem; color: var(--muted); margin-bottom: 20px; }
.empty-state { padding: 60px 20px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: var(--radius); display: none; }
.empty-state.is-visible { display: block; }

/* Product detail */
.product-hero { padding: calc(var(--header-h) + 16px) 0 70px; background: #fff; }
.product-hero__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.product-gallery__main {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #f1f6f9;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.product-gallery__main img { width: 100%; height: 100%; object-fit: contain; padding: 24px; }
.product-gallery__thumbs { display: flex; gap: 10px; margin-top: 12px; }

/* Model-number graphic for products without a clean photo */
.graphic-visual {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  overflow: hidden;
  background:
    radial-gradient(circle at 72% 22%, rgba(0, 174, 239, 0.28), transparent 55%),
    radial-gradient(circle at 20% 90%, rgba(0, 120, 180, 0.22), transparent 55%),
    linear-gradient(135deg, #071a2b, #0b2b44);
  color: #fff;
}
.graphic-visual__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, #000, transparent 78%);
}
.graphic-visual strong {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 2.3rem);
  letter-spacing: 0.08em;
  color: #fff;
}
.graphic-visual small {
  position: relative;
  z-index: 1;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--cyan-3);
  text-align: center;
  padding: 0 18px;
}
.graphic-visual--large strong { font-size: clamp(2rem, 4vw, 3.4rem); }
.graphic-visual--large small { font-size: 0.82rem; }
.product-gallery__thumb {
  width: 76px;
  height: 62px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #f1f6f9;
  padding: 4px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.product-gallery__thumb img { width: 100%; height: 100%; object-fit: contain; }
.product-gallery__thumb.is-active, .product-gallery__thumb:hover { border-color: var(--cyan); }
.product-info__model { display: inline-flex; align-items: center; gap: 8px; font-size: 0.7rem; letter-spacing: 0.14em; font-weight: 700; color: var(--cyan); margin-bottom: 10px; }
.product-info h1 { font-size: clamp(1.9rem, 3.2vw, 2.8rem); margin-bottom: 12px; }
.product-info__summary { color: var(--muted); font-size: 0.98rem; line-height: 1.75; margin-bottom: 22px; }
.product-info__chips { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 26px; }
.product-info__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.product-info__note { display: flex; gap: 10px; align-items: flex-start; padding: 14px 16px; background: var(--mist); border-radius: 10px; font-size: 0.78rem; color: var(--muted); }
.product-info__note svg { width: 17px; height: 17px; color: var(--cyan); flex: 0 0 auto; margin-top: 2px; }

.detail-section { padding: 64px 0; border-top: 1px solid var(--line); }
.detail-section--mist { background: var(--mist); }
.detail-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 64px; align-items: start; }
.detail-grid h2 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); }
.feature-list { display: grid; gap: 13px; }
.feature-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 0.92rem; color: var(--ink-2); }
.feature-list svg { width: 18px; height: 18px; color: var(--cyan); flex: 0 0 auto; margin-top: 2px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.spec-table th, .spec-table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table th { width: 34%; color: var(--muted); font-weight: 600; background: #f8fbfd; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table td { color: var(--ink); font-weight: 600; }

/* Homepage poster: instrument-first product showcase */
.home-poster-section { background: var(--mist); }
.poster {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 44px;
  align-items: center;
  padding: 42px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.poster::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(11, 31, 51, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 31, 51, 0.035) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(115deg, rgba(0, 0, 0, 0.7), transparent 62%);
  pointer-events: none;
}
.poster__copy { position: relative; z-index: 1; }
.poster__model { font-size: 0.72rem; letter-spacing: 0.18em; font-weight: 700; color: var(--cyan); margin-bottom: 8px; }
.poster h2 { font-size: clamp(2rem, 3.4vw, 3rem); margin-bottom: 12px; }
.poster p { color: var(--muted); font-size: 0.95rem; line-height: 1.75; margin-bottom: 18px; }
.poster__specs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.poster__specs span { display: inline-flex; align-items: baseline; gap: 5px; padding: 8px 11px; border-radius: 7px; background: var(--ink); color: #fff; font-size: 0.72rem; line-height: 1.35; }
.poster__specs b { font-size: 0.62rem; font-weight: 600; color: var(--cyan-3); }
.poster__actions { display: flex; flex-wrap: wrap; gap: 10px; }
.poster__media { position: relative; z-index: 1; min-height: 360px; border-radius: 18px; background: linear-gradient(145deg, #eef5fa, #dfeaf3); display: flex; align-items: center; justify-content: center; padding: 20px; overflow: hidden; }
.poster__media::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 70% 20%, rgba(0, 174, 239, 0.16), transparent 55%); pointer-events: none; }
.poster__media img { position: relative; z-index: 1; max-width: 100%; max-height: 420px; object-fit: contain; }
.poster__brand { position: absolute; z-index: 2; right: 16px; bottom: 14px; font-size: 0.62rem; font-weight: 700; letter-spacing: 0.18em; color: rgba(11, 31, 51, 0.45); }

/* Three-part showcase: instrument / composition / report */
.showcase { background: #fff; }
.showcase--report { background: var(--mist); }
.showcase__head { max-width: 720px; margin-bottom: 32px; }
.showcase__head h2 { margin-bottom: 8px; }
.showcase__head p { color: var(--muted); margin: 0; font-size: 0.92rem; }
.composition-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.part-card { margin: 0; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: #fff; display: flex; flex-direction: column; }
.part-card__media { height: 210px; background: #f1f6f9; padding: 16px; display: grid; place-items: center; overflow: hidden; }
.part-card__media img { width: 100%; height: 100%; object-fit: contain; display: block; }
.part-card__label { background: var(--ink); color: #fff; padding: 12px 14px; font-size: 0.8rem; font-weight: 700; text-align: center; line-height: 1.4; }
.feature-strip { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 16px; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #fff; }
.feature-strip__item { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 16px; font-size: 0.82rem; font-weight: 600; border-right: 1px solid var(--line); }
.feature-strip__item:last-child { border-right: 0; }
.feature-strip__item svg { width: 20px; height: 20px; color: var(--cyan); flex: 0 0 auto; }
.report-board { display: grid; grid-template-columns: 1.15fr 0.85fr; grid-template-rows: auto auto; gap: 16px; }
.report-card { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; min-height: 200px; }
.report-card--chart { padding: 20px; min-height: 330px; }
.report-card--software, .report-card--instrument { min-height: 230px; }
.report-card--software img, .report-card--instrument img { width: 100%; height: 100%; object-fit: cover; }
.report-card--instrument img { object-fit: contain; background: #f1f6f9; padding: 16px; }
.report-card__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 0.9rem; font-weight: 700; }
.report-card__head small { font-size: 0.58rem; letter-spacing: 0.12em; color: var(--muted-2); font-weight: 700; }
.report-card__tag { position: absolute; left: 12px; bottom: 12px; padding: 5px 9px; border-radius: 5px; background: rgba(6, 24, 38, 0.78); color: #fff; font-size: 0.58rem; letter-spacing: 0.1em; font-weight: 700; }
.report-card--aux { padding: 18px; display: flex; flex-direction: column; }
.showcase-chart { width: 100%; height: auto; display: block; margin-top: 10px; }
.aux-chart { width: 100%; height: auto; display: block; margin-top: 8px; }
.report-card--software img { object-fit: contain; background: #fff; padding: 8px; }
.report-thumb { display: block; margin-top: 10px; }
.report-preview { width: 100%; height: 360px; object-fit: contain; border-radius: 8px; background: #fff; margin-top: 0; }
.report-download { display: inline-flex; margin-top: 10px; font-size: 0.78rem; font-weight: 700; color: var(--cyan); }
.report-full { margin-top: 24px; padding: 22px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.report-full__head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.report-full__head h3 { margin: 4px 0 0; }
.report-full img { width: 100%; max-height: 1100px; object-fit: contain; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.output-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 16px; }
.output-pill { display: flex; align-items: center; gap: 9px; padding: 13px 14px; background: #fff; border: 1px solid var(--line); border-radius: 12px; font-size: 0.8rem; font-weight: 600; }
.output-pill svg { width: 17px; height: 17px; color: var(--cyan); flex: 0 0 auto; }

.application-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.application {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 0.86rem;
  font-weight: 600;
}
.application span { display: block; font-size: 0.64rem; letter-spacing: 0.12em; color: var(--cyan); margin-bottom: 6px; }

/* Article */
.article-hero { padding: calc(var(--header-h) + 18px) 0 46px; background: var(--navy); color: #fff; }
.article-hero h1 { color: #fff; font-size: clamp(2rem, 3.6vw, 3.2rem); max-width: 900px; }
.article-hero p { color: #a9c0d2; max-width: 780px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 64px; align-items: start; padding: 64px 0 92px; }
.prose { max-width: 760px; color: #1d3448; font-size: 1rem; line-height: 1.9; }
.prose h2 { font-size: 1.6rem; margin: 2.1em 0 0.6em; padding-top: 0.2em; }
.prose h3 { font-size: 1.2rem; margin: 1.8em 0 0.5em; }
.prose p { margin: 0 0 1.15em; }
.prose ul, .prose ol { margin: 0 0 1.3em; padding-left: 1.3em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.45em; }
.prose strong { color: var(--ink); }
.prose blockquote {
  margin: 1.8em 0;
  padding: 18px 22px;
  border-left: 3px solid var(--cyan);
  background: var(--mist);
  border-radius: 0 10px 10px 0;
  color: var(--ink-2);
}
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0 1.8em; font-size: 0.88rem; }
.prose th, .prose td { padding: 10px 12px; border: 1px solid var(--line); text-align: left; }
.prose th { background: var(--mist); font-weight: 700; }
.prose img { border-radius: 12px; margin: 1.5em 0; }
.article-aside { position: sticky; top: 100px; }
.aside-card { padding: 22px; background: var(--mist); border-radius: 14px; margin-bottom: 16px; }
.aside-card h3 { font-size: 0.95rem; margin-bottom: 12px; }
.aside-card ul { display: grid; gap: 9px; }
.aside-card a { font-size: 0.82rem; color: var(--muted); }
.aside-card a:hover { color: var(--cyan); }
.aside-cta { background: var(--navy); color: #fff; }
.aside-cta h3 { color: #fff; }
.aside-cta p { color: #a9c0d2; font-size: 0.8rem; }
.aside-cta .btn, .aside-cta .btn:hover { color: #fff; }

/* About */
.about-story { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 72px; align-items: start; }
.about-story__media { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.about-story__media img { width: 100%; height: 100%; object-fit: cover; border-radius: 14px; }
.about-story__media img:first-child { grid-row: span 2; }
.about-story__media img { min-height: 180px; }
.about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; margin: 26px 0; border-top: 1px solid var(--line); }
.about-facts div { padding: 15px 0; border-bottom: 1px solid var(--line); }
.about-facts dt { font-size: 0.68rem; color: var(--muted-2); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 3px; }
.about-facts dd { margin: 0; font-size: 0.9rem; font-weight: 600; }
.timeline { display: grid; gap: 0; margin-top: 30px; }
.timeline__item { display: grid; grid-template-columns: 100px 1fr; gap: 24px; padding: 22px 0; border-top: 1px solid var(--line); }
.timeline__year { font-weight: 700; color: var(--cyan); font-size: 0.9rem; }
.timeline__body strong { display: block; margin-bottom: 4px; }
.timeline__body p { margin: 0; font-size: 0.86rem; color: var(--muted); }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.capability { padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.capability svg { width: 26px; height: 26px; color: var(--cyan); margin-bottom: 14px; }
.capability h3 { font-size: 1rem; margin-bottom: 6px; }
.capability p { font-size: 0.82rem; color: var(--muted); margin: 0; }
.cert-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.cert { background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.cert img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: #f7fafc; padding: 10px; }
.cert figcaption { padding: 12px 14px; font-size: 0.8rem; color: var(--muted); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: start; }
.contact-title { font-size: clamp(1.8rem, 2.4vw, 2.35rem); line-height: 1.28; }
.contact-cards { display: grid; gap: 12px; }
.contact-card { display: flex; gap: 15px; padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.contact-card__icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 11px; background: var(--cyan-soft); color: var(--cyan); flex: 0 0 auto; }
.contact-card__icon svg { width: 20px; height: 20px; }
.contact-card h3 { font-size: 0.86rem; margin-bottom: 3px; }
.contact-card p, .contact-card a { font-size: 0.86rem; color: var(--muted); margin: 0; line-height: 1.6; }
.contact-card a:hover { color: var(--cyan); }
.form-card { padding: 32px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.form-card h2 { font-size: 1.5rem; margin-bottom: 6px; }
.form-card > p { font-size: 0.86rem; color: var(--muted); margin-bottom: 24px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 0.76rem; font-weight: 700; color: var(--ink-2); }
.field label span { color: var(--cyan); }
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fbfdfe;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--cyan); background: #fff; box-shadow: 0 0 0 4px rgba(0, 174, 239, 0.1); }
.field.is-invalid input, .field.is-invalid textarea { border-color: #e05252; }
.form-note { font-size: 0.72rem; color: var(--muted-2); margin-top: 12px; }
.form-status { display: none; margin-top: 14px; padding: 12px 14px; border-radius: 9px; font-size: 0.82rem; }
.form-status.is-visible { display: block; }
.form-status.is-ok { background: #e8f8f2; color: #147a56; }
.form-status.is-error { background: #fdecec; color: #b23a3a; }
.map-card { margin-top: 18px; padding: 22px; background: var(--navy); color: #fff; border-radius: 14px; }
.map-card h3 { color: #fff; font-size: 0.95rem; }
.map-card p { color: #a9c0d2; font-size: 0.8rem; margin-bottom: 12px; }

/* Footer */
.site-footer { background: #04121e; color: #8fa8ba; padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 48px; padding-bottom: 54px; }
.footer-brand .brand__en { color: #fff; }
.footer-brand p { font-size: 0.82rem; color: #7f9aaf; line-height: 1.8; margin: 18px 0 20px; max-width: 330px; }
.footer-col h4 { color: #fff; font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 16px; }
.footer-col ul { display: grid; gap: 9px; }
.footer-col a { font-size: 0.82rem; color: #8fa8ba; transition: color 0.2s; }
.footer-col a:hover { color: var(--cyan-3); }
.footer-contact li { display: flex; gap: 9px; font-size: 0.8rem; line-height: 1.6; margin-bottom: 10px; }
.footer-contact svg { width: 15px; height: 15px; color: var(--cyan); flex: 0 0 auto; margin-top: 3px; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.72rem;
  color: #5f778a;
}
.footer-bottom a { color: #7f9aaf; }
.footer-bottom a:hover { color: var(--cyan-3); }

/* Back to top */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s, visibility 0.25s, transform 0.25s;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top svg { width: 18px; height: 18px; }

/* Reveal animations */
[data-reveal] { opacity: 1; }
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}

/* Utilities */
.text-center { text-align: center; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive */
@media (max-width: 1120px) {
  .hero__inner { gap: 40px; }
  .hero-chip--a { left: -18px; }
  .hero-chip--b { right: -10px; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 1024px) {
  .nav { display: none; }
  .nav-toggle { display: grid; }
  .header-actions .btn { display: none; }
  .site-header .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    height: calc(100dvh - var(--header-h));
    margin: 0;
    padding: 18px 24px 40px;
    background: #fff;
    color: var(--ink);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    display: block;
    border-top: 1px solid var(--line);
  }
  .nav-open .site-header .nav { transform: translateX(0); }
  .nav__list { display: grid; gap: 2px; }
  .nav__link { display: flex; justify-content: space-between; padding: 14px 4px; border-radius: 0; border-bottom: 1px solid var(--line); font-size: 1rem; }
  .nav__link:hover { background: transparent; color: var(--cyan); }
  .nav-item.has-menu::after { display: none; }
  .nav-item:hover .mega, .nav-item:focus-within .mega { opacity: 0; visibility: hidden; pointer-events: none; }
  .nav-item.is-open .mega { position: static; width: auto; transform: none; opacity: 1; visibility: visible; pointer-events: auto; box-shadow: none; border: 0; padding: 8px 0 12px; display: block; }
  .mega__grid { grid-template-columns: 1fr; }
  .mega__link { padding: 10px 8px; }
  .mega__desc { display: none; }
  .header-actions { margin-left: auto; }
  .hero { min-height: auto; padding: 130px 0 74px; }
  .hero__inner { grid-template-columns: 1fr; gap: 46px; }
  .hero__copy { max-width: 780px; }
  .hero__visual { max-width: 640px; }
  .hero-chip--a { left: 10px; top: -18px; }
  .hero-chip--b { right: 6px; bottom: -16px; }
  .scroll-cue { display: none; }
  .hero__visual { width: 100%; }
  .hero-chip--a { display: none; }
  .hero-card__media { aspect-ratio: 4 / 3; }
  .feature-dark__grid, .split, .about-story, .contact-grid, .product-hero__grid, .detail-grid, .article-layout { grid-template-columns: 1fr; gap: 40px; }
  .split--reverse .split__media { order: 0; }
  .solution-card { grid-template-columns: 1fr; }
  .solution-card__media { min-height: 220px; padding: 12px; }
  .article-aside { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .about-story__media { max-width: 640px; }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .poster { grid-template-columns: 1fr; padding: 32px; gap: 28px; }
  .poster__media { min-height: 300px; }
  .composition-grid { grid-template-columns: repeat(2, 1fr); }
  .report-board { grid-template-columns: 1fr; }
  .report-card--chart { min-height: 280px; }
  .report-card--chart { grid-row: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  :root { --header-h: 68px; }
  .container, .container--narrow { width: calc(100% - 32px); }
  .section { padding: 70px 0; }
  .section--tight { padding: 56px 0; }
  .brand__mark { width: 36px; height: 36px; }
  .brand__logo { height: 38px; max-width: 130px; }
  .brand__en { font-size: 0.92rem; }
  .brand__zh { font-size: 0.64rem; }
  .lang-switch { padding: 7px 10px; font-size: 0.72rem; }
  .hero { padding: 112px 0 60px; }
  .hero h1 { font-size: clamp(2.25rem, 9vw, 3.2rem); }
  .hero__sub { font-size: 0.98rem; }
  .hero__eyebrow { font-size: 0.6rem; letter-spacing: 0.12em; white-space: normal; max-width: 100%; line-height: 1.7; }
  .hero__meta { gap: 10px 18px; font-size: 0.72rem; }
  .hero__actions .btn { flex: 1 1 100%; }
  .hero-card { transform: none; }
  .hero-chip { font-size: 0.7rem; padding: 9px 12px; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 24px 18px; border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: 0; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .section-head { display: block; margin-bottom: 32px; }
  .section-head .btn { margin-top: 18px; }
  .spec-list { grid-template-columns: 1fr; }
  .value-grid, .value-grid--4, .about-facts, .form-grid, .capability-grid, .cert-grid { grid-template-columns: 1fr; }
  .poster { padding: 22px; border-radius: 20px; }
  .poster__media { min-height: 230px; padding: 12px; }
  .poster__specs span { font-size: 0.68rem; }
  .composition-grid { grid-template-columns: 1fr 1fr; }
  .feature-strip { grid-template-columns: 1fr; }
  .feature-strip__item { justify-content: flex-start; border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-strip__item:last-child { border-bottom: 0; }
  .output-strip { grid-template-columns: 1fr 1fr; }
  .application-grid { grid-template-columns: 1fr 1fr; }
  .cta__inner { display: block; }
  .cta__actions { margin-top: 24px; }
  .page-hero { padding: calc(var(--header-h) + 14px) 0 44px; }
  .product-hero { padding: calc(var(--header-h) + 14px) 0 50px; }
  .product-gallery__main { border-radius: 16px; }
  .article-hero { padding: calc(var(--header-h) + 14px) 0 34px; }
  .article-layout { padding: 40px 0 60px; }
  .article-aside { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { display: block; line-height: 1.9; }
  .back-to-top { right: 14px; bottom: 14px; }
  .solution-card__body { padding: 26px 22px; }
  .form-card { padding: 24px 20px; }
  .about-story__media { grid-template-columns: 1fr 1fr; }
  .about-story__media img:first-child { grid-row: auto; }
  .about-story__media img { min-height: 140px; }
  .timeline__item { grid-template-columns: 74px 1fr; gap: 14px; }
}

@media (max-width: 420px) {
  .application-grid { grid-template-columns: 1fr; }
  .composition-grid { grid-template-columns: 1fr; }
  .hero-chip--a { display: none; }
  .hero-chip--b { display: none; }
  .product-gallery__thumb { width: 62px; height: 52px; }
}