/* ============================================================
   隶海实业 Lihai Industrial — Site Stylesheet
   Brand: Eco Green #00A651 / Tech Blue #0072CE
   ============================================================ */

:root {
  --green: #00A651;
  --blue: #0072CE;
  --green-deep: #00843F;
  --blue-deep: #005BA3;
  --ink: #0C2233;
  --ink-soft: #45596B;
  --ink-faint: #7B8FA0;
  --bg: #FFFFFF;
  --bg-alt: #F3F8F6;
  --bg-dark: #06232F;
  --bg-dark-2: #0A3346;
  --line: rgba(12, 34, 51, .09);
  --line-dark: rgba(255, 255, 255, .12);
  --radius: 22px;
  --radius-sm: 14px;
  --shadow: 0 12px 44px rgba(7, 32, 46, .08);
  --shadow-hover: 0 20px 60px rgba(7, 32, 46, .14);
  --font: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  --mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --max: 1200px;
  --header-h: 76px;
  --ease: cubic-bezier(.23, .01, .08, .95);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection { background: rgba(0, 166, 81, .22); }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 clamp(20px, 4vw, 48px); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  transition: transform .45s var(--ease), background .35s ease, box-shadow .35s ease;
  background: transparent;
}
.site-header.is-solid {
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.site-header.is-hidden { transform: translateY(-100%); }
.header-inner {
  max-width: var(--max); margin: 0 auto; height: 100%;
  padding: 0 clamp(20px, 4vw, 48px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { height: 40px; width: auto; flex-shrink: 0; }
.brand-name { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name strong { font-size: 16px; font-weight: 700; letter-spacing: .02em; }
.brand-name span { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: var(--ink-faint); text-transform: uppercase; }

/* header on dark hero (before scroll) */
.site-header.on-dark:not(.is-solid) { color: #fff; }
.site-header.on-dark:not(.is-solid) .brand-name span { color: rgba(255, 255, 255, .6); }
.site-header.on-dark:not(.is-solid) .nav-link { color: rgba(255, 255, 255, .82); }
.site-header.on-dark:not(.is-solid) .nav-link:hover,
.site-header.on-dark:not(.is-solid) .nav-link.is-active { color: #fff; }
.site-header.on-dark:not(.is-solid) .nav-link.is-active::after { background: var(--green); }
.site-header.on-dark:not(.is-solid) .lang-pill { border-color: rgba(255, 255, 255, .3); }
.site-header.on-dark:not(.is-solid) .lang-pill .is-on { background: #fff; color: var(--ink); }
.site-header.on-dark:not(.is-solid) .menu-btn span { background: #fff; }

.main-nav { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 30px); }
.nav-link {
  position: relative; font-size: 14.5px; font-weight: 500;
  color: var(--ink-soft); padding: 6px 2px; transition: color .25s ease;
}
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 2px; background: var(--green);
  transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.is-active { color: var(--ink); font-weight: 700; }
.nav-link.is-active::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }

/* language pill — circular active indicator */
.lang-pill {
  display: flex; align-items: center; cursor: pointer;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 3px; background: transparent; font-family: var(--mono);
}
.lang-pill span {
  display: grid; place-items: center;
  min-width: 34px; height: 28px; padding: 0 8px;
  border-radius: 999px; font-size: 12px; letter-spacing: .06em;
  color: var(--ink-soft); transition: all .3s var(--ease);
}
.lang-pill span.is-on { background: var(--ink); color: #fff; font-weight: 700; }

.menu-btn {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: 0; padding: 8px;
}
.menu-btn span { width: 22px; height: 2px; background: var(--ink); transition: all .3s var(--ease); }
.menu-btn.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn.is-open span:nth-child(2) { opacity: 0; }
.menu-btn.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* mobile nav drawer */
.mobile-nav {
  position: fixed; inset: var(--header-h) 0 auto 0; z-index: 99;
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 12px clamp(20px, 4vw, 48px) 28px;
  transform: translateY(-110%); transition: transform .45s var(--ease);
  display: none;
}
.mobile-nav.is-open { transform: translateY(0); }
.mobile-nav .nav-link { display: block; padding: 14px 0; font-size: 17px; border-bottom: 1px solid var(--line); }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 92vh;
  display: flex; flex-direction: column; justify-content: center;
  background: linear-gradient(155deg, var(--bg-dark) 0%, var(--bg-dark-2) 60%, #0B4059 100%);
  color: #fff; overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 0;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-inner { position: relative; z-index: 2; flex: 1; display: flex; flex-direction: column; justify-content: center; padding-bottom: 40px; }
.hero-kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: .22em;
  text-transform: uppercase; color: rgba(255, 255, 255, .55);
  display: flex; align-items: center; gap: 12px; margin-bottom: 26px;
}
.hero-kicker::before { content: ""; width: 36px; height: 1px; background: var(--green); }
.hero h1 {
  font-size: clamp(34px, 5.4vw, 64px); font-weight: 700;
  line-height: 1.18; letter-spacing: .01em; max-width: 16em;
  margin-bottom: 22px;
}
.hero h1 em { font-style: normal; color: var(--green); }
.hero-sub { font-size: clamp(16px, 1.8vw, 20px); color: rgba(255, 255, 255, .78); max-width: 34em; margin-bottom: 34px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.hero-tag {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .05em;
  border: 1px solid rgba(255, 255, 255, .28); border-radius: 999px;
  padding: 7px 16px; color: rgba(255, 255, 255, .85);
  backdrop-filter: blur(4px); background: rgba(255, 255, 255, .05);
  transition: all .3s ease;
}
.hero-tag:hover { border-color: var(--green); color: #fff; background: rgba(0, 166, 81, .16); }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 15px; font-weight: 600; letter-spacing: .02em;
  padding: 14px 30px; border-radius: 999px; border: 0; cursor: pointer;
  transition: all .3s var(--ease);
}
.btn .arr { transition: transform .3s var(--ease); }
.btn:hover .arr { transform: translateX(5px); }
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 10px 30px rgba(0, 166, 81, .35); }
.btn-primary:hover { background: var(--green-deep); transform: translateY(-2px); box-shadow: 0 16px 40px rgba(0, 166, 81, .45); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, .35); }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .08); }

/* archival spec strip at hero bottom */
.hero-spec {
  position: relative; z-index: 2;
  border-top: 1px solid var(--line-dark);
  font-family: var(--mono); font-size: 12px; letter-spacing: .08em;
  color: rgba(255, 255, 255, .5);
}
.hero-spec .wrap { display: flex; flex-wrap: wrap; gap: 8px 0; padding-top: 18px; padding-bottom: 18px; }
.hero-spec span { padding: 0 26px; border-right: 1px solid var(--line-dark); white-space: nowrap; }
.hero-spec span:first-child { padding-left: 0; }
.hero-spec span:last-child { border-right: 0; }
.hero-spec b { color: rgba(255, 255, 255, .85); font-weight: 400; }

/* ---------- Sections ---------- */
.section { padding: clamp(72px, 9vw, 128px) 0; }
.section.alt { background: var(--bg-alt); }

.sec-head { margin-bottom: clamp(40px, 5vw, 64px); max-width: 720px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-no {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .2em;
  color: var(--green); margin-bottom: 14px; text-transform: uppercase;
}
.sec-no::before { content: ""; width: 26px; height: 1px; background: currentColor; }
.sec-head.center .sec-no::after { content: ""; width: 26px; height: 1px; background: currentColor; }
.sec-head h2 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 700; line-height: 1.25; letter-spacing: .01em; margin-bottom: 14px; }
.sec-head .lead { color: var(--ink-soft); font-size: clamp(15.5px, 1.6vw, 18px); }

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

.card {
  position: relative; background: #fff; border-radius: var(--radius);
  padding: 34px 30px; box-shadow: var(--shadow);
  border: 1px solid var(--line);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.card .idx {
  font-family: var(--mono); font-size: 12px; letter-spacing: .14em;
  color: var(--ink-faint); margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.card .idx::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; line-height: 1.4; }
.card p { color: var(--ink-soft); font-size: 14.5px; flex: 1; }
.card .glyph { width: 46px; height: 46px; margin-bottom: 22px; }
.card .glyph svg { width: 100%; height: 100%; }

/* entry cards (business entries) */
.entry-card { overflow: hidden; padding: 0; }
.entry-card .entry-img { aspect-ratio: 16 / 8.5; overflow: hidden; }
.entry-card .entry-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.entry-card:hover .entry-img img { transform: scale(1.04); }
.entry-card .entry-body { padding: 28px 30px 32px; }
.entry-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; color: var(--blue);
  margin-top: 18px;
}
.entry-link .arr { transition: transform .3s var(--ease); }
.entry-card:hover .entry-link .arr { transform: translateX(5px); }

/* ---------- Figure / image blocks ---------- */
.figure { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); }
.figure img { width: 100%; height: 100%; object-fit: cover; }
.figure-caption {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em;
  color: var(--ink-faint); margin-top: 12px; text-transform: uppercase;
  display: flex; gap: 8px; align-items: center;
}
.figure-caption::before { content: ""; width: 18px; height: 1px; background: var(--ink-faint); }

/* ---------- Archival data rows (certifications / specs) ---------- */
.data-rows { border-top: 1px solid var(--line); }
.data-row {
  position: relative; display: grid;
  grid-template-columns: 220px 1fr auto; gap: 24px; align-items: baseline;
  padding: 26px 8px 26px 22px; border-bottom: 1px solid var(--line);
  transition: background .3s ease;
}
.data-row::before {
  content: ""; position: absolute; left: 2px; top: 50%;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green); transform: translateY(-50%) scale(0);
  transition: transform .3s var(--ease);
}
.data-row:hover { background: var(--bg-alt); }
.data-row:hover::before { transform: translateY(-50%) scale(1); }
.data-row .code { font-family: var(--mono); font-size: 13px; letter-spacing: .04em; color: var(--blue); }
.data-row .name { font-weight: 700; font-size: 17px; }
.data-row .name small { display: block; font-weight: 400; color: var(--ink-soft); font-size: 13.5px; margin-top: 4px; }
.data-row .tag-mono { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; color: var(--ink-faint); text-transform: uppercase; white-space: nowrap; }

/* ---------- Steps / process ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; counter-reset: step; }
.step {
  position: relative; padding: 30px 22px 8px; text-align: left;
  border-top: 2px solid var(--line);
}
.step::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: -2px; left: 0;
  font-family: var(--mono); font-size: 12px; letter-spacing: .14em;
  color: var(--green); background: var(--bg);
  padding: 6px 12px 6px 0; border-top: 2px solid var(--green);
  margin-top: -8px;
}
.step h4 { font-size: 16.5px; font-weight: 700; margin: 26px 0 8px; }
.step p { font-size: 13.5px; color: var(--ink-soft); }
.section.alt .step::before { background: var(--bg-alt); }

/* ---------- Thermochromic interactive demo ---------- */
.thermo-demo {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 5vw, 70px);
  align-items: center; background: var(--bg-dark); color: #fff;
  border-radius: var(--radius); padding: clamp(34px, 5vw, 60px);
}
.thermo-demo h3 { font-size: clamp(22px, 2.6vw, 30px); margin-bottom: 12px; }
.thermo-demo .demo-desc { color: rgba(255, 255, 255, .7); font-size: 15px; margin-bottom: 30px; }
.thermo-swatch {
  aspect-ratio: 4 / 3; border-radius: var(--radius-sm);
  display: grid; place-items: center;
  transition: background .5s ease; position: relative; overflow: hidden;
  border: 1px solid var(--line-dark);
}
.thermo-swatch .swatch-label {
  font-family: var(--mono); font-size: 13px; letter-spacing: .18em;
  color: rgba(255, 255, 255, .92); text-transform: uppercase; text-align: center;
  text-shadow: 0 1px 8px rgba(0, 0, 0, .35);
}
.thermo-readout { display: flex; align-items: baseline; gap: 14px; margin-bottom: 18px; font-family: var(--mono); }
.thermo-readout .temp { font-size: 44px; font-weight: 400; letter-spacing: .02em; }
.thermo-readout .state { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: rgba(255, 255, 255, .6); }
input[type="range"].temp-slider {
  width: 100%; appearance: none; -webkit-appearance: none;
  height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green), #E8912D);
  outline: none; cursor: pointer;
}
input[type="range"].temp-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: #fff; border: 3px solid var(--ink); box-shadow: 0 2px 10px rgba(0, 0, 0, .4);
}
input[type="range"].temp-slider::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%;
  background: #fff; border: 3px solid var(--ink);
}
.demo-scale { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 11px; color: rgba(255, 255, 255, .5); margin-top: 10px; letter-spacing: .08em; }

/* ---------- Split blocks (business page) ---------- */
.split {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px); align-items: center;
  padding: clamp(36px, 4vw, 56px) 0;
}
.split + .split { border-top: 1px solid var(--line); }
.split.flip .split-media { order: 2; }
.split-media .figure { aspect-ratio: 4 / 3; }
.split-body .mono-label {
  font-family: var(--mono); font-size: 12px; letter-spacing: .2em;
  color: var(--green); text-transform: uppercase; margin-bottom: 14px;
  display: flex; align-items: center; gap: 10px;
}
.split-body .mono-label::before { content: ""; width: 26px; height: 1px; background: currentColor; }
.split-body h3 { font-size: clamp(24px, 3vw, 34px); font-weight: 700; margin-bottom: 16px; }
.split-body .desc { color: var(--ink-soft); margin-bottom: 22px; font-size: 15.5px; }
.spec-list li {
  display: grid; grid-template-columns: 130px 1fr; gap: 16px;
  padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14.5px;
}
.spec-list li:first-child { border-top: 1px solid var(--line); }
.spec-list .k { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; color: var(--ink-faint); text-transform: uppercase; padding-top: 2px; }
.note-band {
  margin-top: 22px; padding: 16px 20px; border-radius: var(--radius-sm);
  background: var(--bg-alt); font-size: 14px; color: var(--ink-soft);
  border-left: 3px solid var(--green);
}

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.stat { border-top: 2px solid var(--line); padding-top: 22px; }
.stat .num { font-size: clamp(30px, 3.4vw, 44px); font-weight: 700; letter-spacing: .01em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat .num sup { font-size: .45em; font-weight: 500; color: var(--green); margin-left: 2px; }
.stat .lbl { font-size: 13.5px; color: var(--ink-soft); margin-top: 8px; }

/* ---------- Pill list (cooperation modes) ---------- */
.pill-list { display: flex; flex-wrap: wrap; gap: 12px; }
.pill-list li {
  border: 1px solid var(--line); border-radius: 999px;
  padding: 12px 24px; font-weight: 600; font-size: 15px;
  background: #fff; transition: all .3s var(--ease);
}
.pill-list li:hover { border-color: var(--green); color: var(--green-deep); transform: translateY(-2px); box-shadow: var(--shadow); }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(140deg, var(--bg-dark) 0%, #0B3B50 55%, #0C4A3A 100%);
  color: #fff; text-align: center;
}
.cta-band h2 { font-size: clamp(30px, 4vw, 48px); font-weight: 700; margin-bottom: 14px; }
.cta-band .sub { color: rgba(255, 255, 255, .72); font-size: clamp(15px, 1.7vw, 19px); margin-bottom: 36px; }
.cta-band .contact-line {
  margin-top: 34px; font-family: var(--mono); font-size: 12.5px;
  letter-spacing: .06em; color: rgba(255, 255, 255, .55);
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 34px;
}
.cta-band .contact-line b { color: rgba(255, 255, 255, .85); font-weight: 400; }

/* ---------- Page hero (sub pages) ---------- */
.page-hero {
  position: relative; background: linear-gradient(155deg, var(--bg-dark), var(--bg-dark-2));
  color: #fff; padding: calc(var(--header-h) + clamp(60px, 8vw, 100px)) 0 clamp(56px, 7vw, 88px);
  overflow: hidden;
}
.page-hero .hero-canvas { opacity: 1; }
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(34px, 5vw, 56px); font-weight: 700; line-height: 1.2; margin-bottom: 14px; }
.page-hero .sub { color: rgba(255, 255, 255, .72); font-size: clamp(15.5px, 1.7vw, 19px); max-width: 40em; }
.crumb { font-family: var(--mono); font-size: 11.5px; letter-spacing: .2em; text-transform: uppercase; color: rgba(255, 255, 255, .5); margin-bottom: 22px; display: flex; gap: 10px; align-items: center; }
.crumb::before { content: ""; width: 30px; height: 1px; background: var(--green); }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-dark); color: rgba(255, 255, 255, .65); padding: clamp(56px, 7vw, 88px) 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px;
  padding-bottom: 56px; border-bottom: 1px solid var(--line-dark);
}
.footer-brand .brand-name strong { color: #fff; font-size: 18px; }
.footer-brand .brand-name span { color: rgba(255, 255, 255, .45); }
.footer-brand p { font-size: 13.5px; margin-top: 18px; max-width: 30em; color: rgba(255, 255, 255, .55); }
.footer-col h5 {
  font-family: var(--mono); font-size: 11px; letter-spacing: .2em;
  text-transform: uppercase; color: rgba(255, 255, 255, .4); margin-bottom: 20px;
}
.footer-col li { margin-bottom: 12px; }
.footer-col a { font-size: 14px; transition: color .25s ease; }
.footer-col a:hover { color: #fff; }
.footer-contact li { font-size: 13.5px; margin-bottom: 12px; display: flex; gap: 10px; }
.footer-contact .k { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: rgba(255, 255, 255, .38); text-transform: uppercase; min-width: 62px; padding-top: 3px; }
.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  padding: 26px 0; font-family: var(--mono); font-size: 11.5px;
  letter-spacing: .06em; color: rgba(255, 255, 255, .38);
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .thermo-demo { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .main-nav { display: none; }
  .menu-btn { display: flex; }
  .mobile-nav { display: block; transform: translateY(-110%); }
  .mobile-nav.is-open { transform: translateY(0); }
  .split, .split.flip { grid-template-columns: 1fr; }
  .split.flip .split-media { order: 0; }
  .card-grid.cols-3 { grid-template-columns: 1fr; }
  .data-row { grid-template-columns: 1fr; gap: 6px; padding-left: 22px; }
  .data-row .tag-mono { display: none; }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .card-grid.cols-4, .card-grid.cols-2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-spec span { padding: 0 14px; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: 100svh; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}