/* 艾科仪器 · 首页视觉稿 V3 — 仪器面板 */

:root {
  --bg: #f2f0eb;
  --surface: #faf9f5;
  --tile: #e7e4dc;
  --ink: #191b1a;
  --ink-2: #232624;
  --ink-3: #141615;
  --graphite: #4d524e;
  --muted: #767b75;
  --line: #d9d5ca;
  --line-dark: rgba(242, 240, 235, 0.16);
  --signal: #e0461b;
  --signal-deep: #b83712;
  --font: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --num: "DIN Next LT Pro", "Bahnschrift", "DIN Alternate", "Arial Narrow", sans-serif;
  --rail: 232px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, p, dl, dd, figure { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button, input { font: inherit; }

:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--bg);
  font-size: 14px;
  transition: top 0.2s;
}

.skip-link:focus { top: 12px; }

/* ---------- 左侧索引栏 ---------- */

.rail {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  width: var(--rail);
  padding: 26px 24px 28px;
  background: var(--bg);
  border-right: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
}

.brand-mark { width: 32px; height: 32px; flex: none; }

.brand-text { display: flex; flex-direction: column; line-height: 1; }

.brand-text strong {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-text em {
  margin-top: 6px;
  font-family: var(--num);
  font-style: normal;
  font-size: 7.5px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.rail-toggle { display: none; }

.rail-nav { margin-top: 58px; border-top: 1px solid var(--line); }

.rail-nav a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  font-size: 13px;
  color: var(--graphite);
  border-bottom: 1px solid transparent;
  transition: color 0.2s;
}

.rail-nav a span {
  font-family: var(--num);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.2s;
}

.rail-nav a:hover { color: var(--ink); }
.rail-nav a:hover span { color: var(--signal); }

.rail-nav a.is-active {
  color: var(--ink);
  font-weight: 600;
}

.rail-nav a.is-active span { color: var(--signal); }

.rail-contact {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
}

.rail-label {
  margin-bottom: 6px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.rail-tel {
  display: block;
  font-family: var(--num);
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.rail-contact a { display: block; }
.rail-contact a:hover { color: var(--ink); }
.rail-contact > p:last-child { margin-top: 4px; }

/* ---------- 主区域 ---------- */

.page { margin-left: var(--rail); }

.container {
  width: min(1320px, calc(100% - 112px));
  margin-inline: auto;
}

.main-head {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
  padding: 0 56px;
  background: rgba(242, 240, 235, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.head-note {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.head-tools { display: flex; align-items: center; gap: 20px; }

.search {
  display: flex;
  align-items: center;
  width: 210px;
  border-bottom: 1px solid #bdb8ac;
  transition: border-color 0.2s;
}

.search:focus-within { border-color: var(--ink); }

.search-input {
  width: 100%;
  padding: 6px 2px;
  border: 0;
  background: transparent;
  font-size: 12.5px;
  color: var(--ink);
  outline: none;
}

.search-input::placeholder { color: #969b95; }

.search-btn {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--graphite);
  cursor: pointer;
}

.search-btn:hover { color: var(--signal); }
.search-btn svg { width: 16px; height: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 28px;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--ink);
  color: var(--bg);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn:hover { background: var(--signal); border-color: var(--signal); color: #fff; }

.btn-ghost { background: transparent; color: var(--ink); border-color: #bdb8ac; }
.btn-ghost:hover { background: var(--ink); border-color: var(--ink); color: var(--bg); }

.btn-signal { background: var(--signal); border-color: var(--signal); color: #fff; }
.btn-signal:hover { background: var(--signal-deep); border-color: var(--signal-deep); }

.btn-outline-light { background: transparent; border-color: rgba(242, 240, 235, 0.5); color: var(--bg); }
.btn-outline-light:hover { background: var(--bg); border-color: var(--bg); color: var(--ink); }

.btn-sm { height: 36px; padding: 0 16px; font-size: 12.5px; background: var(--signal); border-color: var(--signal); color: #fff; }
.btn-sm:hover { background: var(--signal-deep); border-color: var(--signal-deep); color: #fff; }

/* ---------- 首屏 ---------- */

.hero { padding-top: 72px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  align-items: center;
  gap: 56px;
  width: min(1320px, calc(100% - 112px));
  margin-inline: auto;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.07em;
  color: var(--graphite);
}

.eyebrow span { width: 18px; height: 2px; background: var(--signal); }

.hero h1 {
  margin-top: 24px;
  font-size: clamp(44px, 5.2vw, 80px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.045em;
}

.hero h1 .dot { color: var(--signal); }

.lead {
  max-width: 31em;
  margin-top: 26px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--graphite);
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.note { margin-top: 22px; font-size: 12.5px; color: var(--muted); }

.note a {
  color: var(--ink);
  border-bottom: 1px solid #bdb8ac;
  transition: color 0.2s, border-color 0.2s;
}

.note a:hover { color: var(--signal); border-color: var(--signal); }

.hero-stage {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1.14 / 1;
  padding: 38px;
  background: var(--tile);
  border-top: 3px solid var(--ink);
}

.hero-stage::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 84px;
  height: 3px;
  background: var(--signal);
}

.hero-stage img {
  width: 100%;
  max-width: 460px;
  mix-blend-mode: multiply;
}

.stage-meta,
.stage-model {
  position: absolute;
  font-family: var(--num);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--graphite);
}

.stage-meta { top: 14px; left: 16px; }
.stage-model { right: 16px; bottom: 12px; color: var(--signal); }

.report {
  width: min(1320px, calc(100% - 112px));
  margin: 52px auto 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--signal);
}

.report-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 24px 12px;
  border-bottom: 1px solid var(--line);
}

.report-head p { font-size: 13px; font-weight: 600; }
.report-head span { font-size: 11px; letter-spacing: 0.12em; color: var(--muted); }

.report-rows { display: grid; grid-template-columns: repeat(4, 1fr); }

.report-rows div {
  padding: 16px 24px 18px;
}

.report-rows div + div { border-left: 1px solid var(--line); }

.report-rows dt { font-size: 11px; letter-spacing: 0.08em; color: var(--muted); }

.report-rows dd {
  margin-top: 2px;
  font-family: var(--num);
  font-size: 20px;
  letter-spacing: 0.02em;
}

.report-rows dd i {
  margin-left: 3px;
  font-family: var(--font);
  font-style: normal;
  font-size: 10px;
  color: var(--muted);
}

.report-note {
  padding: 11px 24px 13px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  color: var(--muted);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(1320px, calc(100% - 112px));
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.hero-facts li { padding: 22px 0 26px; }
.hero-facts li + li { padding-left: 28px; border-left: 1px solid var(--line); }

.hero-facts span {
  display: block;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero-facts p { margin-top: 2px; font-size: 11.5px; color: var(--muted); }

/* ---------- 通用区块 ---------- */

.section { padding: 88px 0; }

.section .container::before {
  content: "";
  display: block;
  height: 12px;
  margin-bottom: 34px;
  border-top: 1px solid var(--line);
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 20px);
  background-size: 100% 6px;
  background-repeat: no-repeat;
}

section[id] { scroll-margin-top: 64px; }

.sec-head {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0 28px;
  margin-bottom: 36px;
}

.sec-tag {
  font-family: var(--num);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.sec-head h2 {
  font-size: clamp(28px, 2.8vw, 38px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.sec-head p {
  max-width: 40em;
  font-size: 13px;
  line-height: 1.8;
  color: var(--graphite);
}

.text-link {
  justify-self: end;
  padding-bottom: 1px;
  font-size: 12px;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  transition: color 0.2s, border-color 0.2s;
}

.text-link:hover { color: var(--signal); border-color: var(--signal); }

/* ---------- 参数索引 ---------- */

.spec-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 64px;
}

.spec-list li { border-top: 1px solid var(--line); }

.spec-list a {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  padding: 15px 0 16px;
  transition: background 0.2s;
}

.spec-name { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; transition: color 0.2s; }
.spec-method { font-size: 12px; color: var(--muted); }

.spec-mark {
  font-family: var(--num);
  font-size: 17px;
  font-weight: 300;
  color: var(--signal);
  transition: transform 0.25s;
}

.spec-list a:hover { background: var(--tile); }
.spec-list a:hover .spec-name { color: var(--signal); }
.spec-list a:hover .spec-mark { transform: rotate(45deg); }

/* ---------- 精选机型 ---------- */

.feature {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  margin-bottom: 1px;
  background: var(--ink);
  color: var(--bg);
}

.feature-copy { padding: 44px 48px 46px; }

.feature-tag {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.feature h3 {
  margin-top: 14px;
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.03em;
}

.feature-desc {
  max-width: 30em;
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.85;
  color: #b9bdb8;
}

.feature-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 26px;
  background: rgba(242, 240, 235, 0.18);
  border: 1px solid rgba(242, 240, 235, 0.18);
}

.feature-specs div { padding: 10px 14px 12px; background: var(--ink); }

.feature-specs dt { font-size: 10px; letter-spacing: 0.08em; color: #9da29c; }

.feature-specs dd {
  margin-top: 1px;
  font-family: var(--num);
  font-size: 14px;
  letter-spacing: 0.02em;
}

.feature-link {
  display: inline-block;
  margin-top: 24px;
  padding-bottom: 2px;
  font-size: 12px;
  color: var(--bg);
  border-bottom: 1px solid var(--signal);
}

.feature:hover .feature-link { color: var(--signal); }

.feature-stage {
  display: grid;
  place-items: center;
  padding: 36px;
  background: var(--tile);
}

.feature-stage img {
  width: 100%;
  max-width: 420px;
  mix-blend-mode: multiply;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.feature:hover .feature-stage img { transform: scale(1.03); }

.prod-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.prod {
  display: block;
  padding: 18px 18px 20px;
  background: var(--bg);
  transition: background 0.2s;
}

.prod:hover { background: var(--surface); }

.prod-media {
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  padding: 14px;
  background: var(--tile);
}

.prod-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.prod:hover .prod-media img { transform: scale(1.04); }

.prod-model {
  margin-top: 13px;
  font-family: var(--num);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--signal);
}

.prod h3 {
  margin-top: 3px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s;
}

.prod:hover h3 { color: var(--signal); }

/* ---------- 服务流程 ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.steps li {
  position: relative;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.steps li::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--signal);
}

.step-no {
  font-family: var(--num);
  font-size: 26px;
  font-weight: 400;
  letter-spacing: 0.03em;
  color: var(--signal);
}

.steps h3 { margin-top: 8px; font-size: 19px; font-weight: 700; letter-spacing: -0.02em; }
.steps p { margin-top: 8px; font-size: 12.5px; line-height: 1.8; color: var(--graphite); }

/* ---------- 应用场景 ---------- */

.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 48px; }

.app-grid li { padding: 20px 0 26px; border-top: 1px solid var(--line); }

.app-grid h3 { font-size: 21px; font-weight: 700; letter-spacing: -0.02em; transition: color 0.2s; }
.app-grid li:hover h3 { color: var(--signal); }
.app-grid p { margin-top: 6px; font-size: 12.5px; line-height: 1.8; color: var(--graphite); }

/* ---------- 新闻与技术 ---------- */

.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 64px; }

.news-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
}

.news-head h3 { font-size: 18px; font-weight: 700; }

.news-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.news-list a { font-size: 13.5px; line-height: 1.7; transition: color 0.2s; }
.news-list li:hover a { color: var(--signal); }

.news-list time {
  font-family: var(--num);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 联系 ---------- */

.contact {
  padding: 88px 0;
  background: var(--ink);
  color: var(--bg);
}

.contact-in {
  display: grid;
  grid-template-columns: 1.1fr 0.85fr auto;
  align-items: start;
  gap: 48px;
}

.contact h2 {
  margin-top: 16px;
  font-size: clamp(34px, 3.8vw, 52px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.contact-copy > p {
  max-width: 28em;
  margin-top: 16px;
  font-size: 13.5px;
  line-height: 1.9;
  color: #b9bdb8;
}

.contact .actions { margin-top: 30px; }

.contact-list { border-top: 1px solid var(--line-dark); }

.contact-list div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-dark);
}

.contact-list dt { font-size: 11px; color: #9da29c; }
.contact-list dd { font-size: 13.5px; }
.contact-list a:hover { color: var(--signal); }

.qr {
  margin: 0;
  padding: 9px 9px 11px;
  background: var(--surface);
  color: var(--ink);
  text-align: center;
}

.qr img { width: 114px; height: 114px; }
.qr figcaption { margin-top: 7px; font-size: 10.5px; color: var(--graphite); }

/* ---------- 页脚 ---------- */

.site-foot { padding: 60px 0 24px; background: var(--ink-3); color: #b9bdb8; font-size: 12.5px; }

.foot-top { display: grid; grid-template-columns: 1.1fr 1.5fr; gap: 72px; }

.brand-light { color: var(--bg); }
.brand-light .brand-mark rect { fill: var(--bone); }
.brand-light .brand-mark path { stroke: var(--ink); }
.brand-light .brand-text strong { color: var(--bg); }
.brand-light .brand-text em { color: #7d827c; }

.foot-brand > p { max-width: 34em; margin-top: 18px; line-height: 1.85; color: #8f948e; }

.foot-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }

.foot-nav h3 {
  margin-bottom: 10px;
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: #8f948e;
}

.foot-nav a { display: block; padding: 4px 0; color: #c3c7c1; transition: color 0.2s; }
.foot-nav a:hover { color: var(--signal); }

.foot-links { margin-top: 44px; border-top: 1px solid rgba(242, 240, 235, 0.12); }

.foot-links summary {
  padding: 18px 0;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: #8f948e;
  cursor: pointer;
}

.foot-links summary:hover { color: #c3c7c1; }
.foot-links p { padding-bottom: 18px; line-height: 2.1; }
.foot-links a { margin-right: 18px; color: #7d827c; font-size: 11.5px; transition: color 0.2s; }
.foot-links a:hover { color: var(--signal); }

.foot-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(242, 240, 235, 0.12);
  font-size: 11px;
  color: #7d827c;
}

.foot-bottom a:hover { color: #c3c7c1; }

/* ---------- 响应式 ---------- */

@media (max-width: 1280px) {
  .container,
  .hero-grid,
  .report,
  .hero-facts { width: calc(100% - 80px); }
  .main-head { padding: 0 40px; }
  .search { width: 170px; }
  .spec-list a { grid-template-columns: 190px minmax(0, 1fr) auto; }
}

@media (max-width: 1100px) {
  :root { --rail: 0px; }

  .rail {
    top: 0;
    right: 0;
    bottom: auto;
    left: 0;
    width: auto;
    height: 64px;
    padding: 0 20px;
    flex-direction: row;
    align-items: center;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    overflow: hidden;
    transition: height 0.25s;
  }

  .rail.is-open {
    height: auto;
    max-height: calc(100vh - 0px);
    display: block;
    overflow-y: auto;
    padding-bottom: 22px;
    box-shadow: 0 24px 40px -28px rgba(0, 0, 0, 0.4);
  }

  .rail-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }

  .rail.is-open .rail-top { height: 64px; }

  .rail-toggle {
    display: block;
    width: 38px;
    height: 38px;
    padding: 10px 8px;
    border: 1px solid var(--line);
    background: transparent;
    cursor: pointer;
  }

  .rail-toggle span { display: block; height: 1.5px; background: var(--ink); transition: transform 0.25s; }
  .rail-toggle span + span { margin-top: 6px; }
  .rail-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.75px) rotate(45deg); }
  .rail-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.75px) rotate(-45deg); }

  .rail-nav { display: none; margin-top: 10px; border-top: 1px solid var(--line); }
  .rail.is-open .rail-nav { display: block; }
  .rail-nav a { padding: 13px 0; font-size: 15px; border-bottom-color: var(--line); }

  .rail-contact { display: none; }
  .rail.is-open .rail-contact { display: block; margin-top: 22px; }

  .page { margin-left: 0; padding-top: 64px; }

  .main-head { display: none; }

  .hero { padding-top: 48px; }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 42px;
    width: calc(100% - 80px);
  }

  .hero h1 { font-size: clamp(44px, 7.4vw, 68px); }

  .hero-stage { max-width: 560px; width: 100%; margin-inline: auto; }

  .report { width: calc(100% - 80px); }
  .hero-facts { width: calc(100% - 80px); }

  .section { padding: 68px 0; }
  .container { width: calc(100% - 80px); }

  .sec-head { grid-template-columns: auto auto 1fr; gap: 8px 20px; }
  .sec-head h2 { grid-column: 2; }
  .sec-head p { grid-column: 1 / -1; grid-row: 2; max-width: 46em; }
  .sec-head .text-link { grid-column: 3; grid-row: 1; justify-self: end; }

  .spec-list a { grid-template-columns: 200px minmax(0, 1fr) auto; }

  .feature { grid-template-columns: 1fr; }
  .feature-stage { padding: 30px; }
  .feature-stage img { max-width: 360px; }

  .prod-grid { grid-template-columns: repeat(2, 1fr); }

  .steps { grid-template-columns: repeat(2, 1fr); gap: 28px; }

  .app-grid { grid-template-columns: repeat(2, 1fr); }

  .contact-in { grid-template-columns: 1fr 1fr; }
  .qr { justify-self: start; }

  .foot-top { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 680px) {
  .container,
  .hero-grid,
  .report,
  .hero-facts { width: calc(100% - 40px); }

  .brand-mark { width: 28px; height: 28px; }
  .brand-text strong { font-size: 17px; }

  .hero h1 { font-size: 42px; letter-spacing: -0.04em; }
  .lead { font-size: 14.5px; }
  .hero-stage { padding: 24px; aspect-ratio: 1.05 / 1; }
  .hero-stage img { max-width: 300px; }

  .report-rows { grid-template-columns: repeat(2, 1fr); }
  .report-rows div:nth-child(3) { border-left: 0; }
  .report-rows div:nth-child(n+3) { border-top: 1px solid var(--line); }

  .hero-facts { grid-template-columns: repeat(2, 1fr); }
  .hero-facts li + li { padding-left: 0; border-left: 0; }
  .hero-facts li:nth-child(2n) { padding-left: 18px; border-left: 1px solid var(--line); }
  .hero-facts li:nth-child(n+3) { border-top: 1px solid var(--line); }

  .section { padding: 54px 0; }
  .section .container::before { margin-bottom: 26px; }

  .sec-head { grid-template-columns: auto 1fr auto; }
  .sec-head h2 { font-size: 27px; }
  .sec-head p { font-size: 12.5px; }

  .spec-list { grid-template-columns: 1fr; }
  .spec-list a { grid-template-columns: minmax(0, 1fr) auto; gap: 4px 16px; padding: 13px 0; }
  .spec-name { font-size: 15px; }
  .spec-method { grid-column: 1; }
  .spec-mark { grid-column: 2; grid-row: 1 / 3; }

  .feature-copy { padding: 30px 22px 34px; }
  .feature h3 { font-size: 27px; }
  .feature-specs { grid-template-columns: 1fr 1fr; }
  .feature-stage { padding: 22px; }

  .prod-grid { gap: 1px; }
  .prod { padding: 12px 12px 16px; }
  .prod-media { padding: 8px; }
  .prod h3 { font-size: 13px; }
  .prod-model { font-size: 10px; }

  .steps { grid-template-columns: 1fr; gap: 22px; }
  .step-no { font-size: 22px; }

  .app-grid { grid-template-columns: 1fr; }
  .app-grid h3 { font-size: 19px; }

  .news-grid { grid-template-columns: 1fr; gap: 32px; }

  .contact { padding: 60px 0; }
  .contact-in { grid-template-columns: 1fr; gap: 34px; }
  .qr { justify-self: start; }

  .foot-nav { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .foot-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.001ms !important;
  }
}