@font-face {
  font-family: "Smiley Sans";
  src: url("assets/fonts/smiley-sans.woff2") format("woff2");
  font-style: normal;
  font-display: swap;
}

:root {
  --ink-950: #0d1416;
  --ink-900: #111a1d;
  --ink-800: #1a272a;
  --paper: #ecefeb;
  --paper-soft: #f5f6f3;
  --surface: #e1e6e2;
  --line: #c7ceca;
  --line-dark: #344145;
  --text: #172124;
  --muted: #5d696b;
  --muted-dark: #a9b3b2;
  --vita: #6d908a;
  --vita-deep: #3f6863;
  --vita-wash: #dce6e2;
  --omni: #9a825e;
  --omni-deep: #705a3b;
  --omni-wash: #e8e1d6;
  --white: #ffffff;
  --radius: 14px;
  --header-height: 68px;
  --page-gutter: clamp(1.25rem, 4vw, 4.5rem);
  --section-space: clamp(6.5rem, 10vw, 10rem);
  --content-max: 1380px;
  --scroll-progress: 0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  margin: 0;
  color: var(--text);
  background: var(--paper);
  font-family: "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::selection,
body *::selection {
  color: var(--white);
  background: var(--vita-deep);
}

body::-webkit-scrollbar {
  width: 10px;
}

body::-webkit-scrollbar-track {
  background: var(--ink-950);
}

body::-webkit-scrollbar-thumb {
  border: 3px solid var(--ink-950);
  border-radius: 10px;
  background: #536064;
}

body::-webkit-scrollbar-thumb:hover {
  background: var(--vita);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.28em;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button,
video {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
video:focus-visible {
  outline: 3px solid var(--omni);
  outline-offset: 4px;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
h4,
p,
figure,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  text-wrap: balance;
}

h1,
h2 {
  font-family: "Smiley Sans", "Source Han Sans SC", sans-serif;
  font-weight: 400;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 10ch;
  font-size: clamp(3.7rem, 7.4vw, 6rem);
  line-height: 1.02;
}

h2 {
  font-size: clamp(2.7rem, 5vw, 4.7rem);
  line-height: 1.05;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  line-height: 1.2;
}

h4 {
  font-size: 1.05rem;
  line-height: 1.3;
}

.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;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  padding: 0.7rem 1rem;
  color: var(--ink-950);
  background: var(--paper-soft);
  border-radius: 4px;
  transform: translateY(-180%);
  transition: transform 180ms ease-out;
}

.skip-link:focus {
  transform: translateY(0);
}

.section-shell {
  width: min(100%, var(--content-max));
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto minmax(130px, 1fr);
  align-items: center;
  gap: 1.5rem;
  padding-inline: var(--page-gutter);
  color: var(--paper-soft);
  background: rgba(13, 20, 22, 0.97);
  border-bottom: 1px solid rgba(199, 206, 202, 0.16);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  width: max-content;
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.brand > span {
  display: grid;
  line-height: 1;
}

.brand strong {
  font-size: 0.92rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.brand small {
  margin-top: 0.34rem;
  color: var(--muted-dark);
  font-size: 0.54rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.15rem, 2.5vw, 2.5rem);
}

.site-nav a {
  position: relative;
  color: var(--muted-dark);
  font-size: 0.84rem;
  text-decoration: none;
  transition: color 180ms ease-out;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -0.62rem;
  height: 1px;
  background: var(--paper-soft);
  transition: right 180ms ease-out;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--white);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  right: 0;
}

.header-action {
  justify-self: end;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 0.95rem;
  color: var(--paper-soft);
  border: 1px solid rgba(199, 206, 202, 0.42);
  border-radius: 4px;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: color 180ms ease-out, background 180ms ease-out, border-color 180ms ease-out;
}

.header-action:hover {
  color: var(--ink-950);
  background: var(--paper-soft);
  border-color: var(--paper-soft);
}

.nav-toggle {
  display: none;
}

.nav-progress {
  position: absolute;
  inset: auto 0 -1px;
  height: 1px;
  overflow: hidden;
}

.nav-progress span {
  display: block;
  width: calc(var(--scroll-progress) * 100%);
  height: 100%;
  background: var(--vita);
}

.hero {
  position: relative;
  color: var(--paper-soft);
  background: var(--ink-900);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: var(--header-height) 0 0 52%;
  border-left: 1px solid rgba(199, 206, 202, 0.09);
  border-top: 1px solid rgba(199, 206, 202, 0.07);
  pointer-events: none;
}

.hero-inner {
  min-height: 780px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.7fr);
  grid-template-rows: 1fr auto;
  gap: 4rem 7vw;
  padding-top: calc(var(--header-height) + 5rem);
  padding-bottom: 3rem;
}

.hero-copy,
.product-index {
  align-self: center;
}

.hero-copy p {
  max-width: 58ch;
  margin-top: 2rem;
  color: var(--muted-dark);
  font-size: clamp(1rem, 1.45vw, 1.2rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 2.5rem;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 750;
  text-decoration: none;
  transition: color 180ms ease-out, background 180ms ease-out, border-color 180ms ease-out;
}

.button-primary {
  color: var(--ink-950);
  background: var(--paper-soft);
}

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

.button-quiet {
  color: var(--paper-soft);
  border-color: var(--line-dark);
}

.button-quiet:hover {
  border-color: var(--muted-dark);
}

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

.index-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.7fr) 1fr auto;
  gap: 1.25rem;
  align-items: center;
  min-height: 112px;
  color: var(--paper-soft);
  border-bottom: 1px solid var(--line-dark);
  text-decoration: none;
}

.index-row::before {
  content: "";
  width: 28px;
  height: 2px;
  grid-column: 1 / -1;
  align-self: end;
  margin-bottom: -1px;
  background: var(--vita);
  transform: scaleX(0.35);
  transform-origin: left;
  transition: transform 260ms cubic-bezier(.2, .8, .2, 1);
}

.index-omni::before {
  background: var(--omni);
}

.index-row:hover::before {
  transform: scaleX(1);
}

.index-name {
  font-family: "Smiley Sans", sans-serif;
  font-size: clamp(1.7rem, 3vw, 2.65rem);
  line-height: 1;
}

.index-desc {
  color: var(--muted-dark);
  font-size: 0.84rem;
}

.index-row svg {
  width: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-meta {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-dark);
}

.hero-meta > div {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0.8rem;
  padding: 1.45rem 1.5rem 0 0;
}

.hero-meta > div + div {
  padding-left: 1.5rem;
  border-left: 1px solid var(--line-dark);
}

.hero-meta dt {
  color: #c2cac8;
  font-size: 0.74rem;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.hero-meta dd {
  color: var(--muted-dark);
  font-size: 0.78rem;
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(440px, 1.1fr);
  gap: clamp(4rem, 9vw, 9rem);
  padding-block: var(--section-space);
}

.about-intro p {
  max-width: 60ch;
  margin-top: 2rem;
  color: var(--muted);
  font-size: 1.03rem;
}

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

.fact-list > div {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 2rem;
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--line);
}

.fact-list dt {
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.fact-list dd {
  color: var(--muted);
  font-size: 0.92rem;
}

/* ===== 产品矩阵：左右对称 + 研产闭环 ===== */

.products {
  position: relative;
  padding-block: var(--section-space);
  background: var(--paper);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.products-heading {
  max-width: 780px;
  margin-inline: auto;
  text-align: center;
}

.products-eyebrow {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.26em;
}

.products-heading h2 {
  margin-top: 1.2rem;
}

.products-sub {
  max-width: 56ch;
  margin: 1.6rem auto 0;
  color: var(--muted);
  font-size: 1.0rem;
}

.products-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(200px, 16vw, 250px) minmax(0, 1fr);
  align-items: stretch;
  margin-top: clamp(3.5rem, 6vw, 5.5rem);
}

.product-col {
  --accent: var(--vita);
  --accent-deep: var(--vita-deep);
  --accent-wash: var(--vita-wash);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: clamp(1.9rem, 2.6vw, 2.7rem);
  padding: clamp(2rem, 3.2vw, 3.2rem);
  background: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: box-shadow 260ms ease-out, border-color 260ms ease-out, transform 260ms ease-out;
}

.product-col::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto;
  height: 4px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(90deg, var(--accent), transparent 130%);
}

.product-col:hover {
  border-color: var(--accent);
  box-shadow: 0 22px 48px rgba(13, 20, 22, 0.1);
  transform: translateY(-4px);
}

.col-omics {
  --accent: var(--omni);
  --accent-deep: var(--omni-deep);
  --accent-wash: var(--omni-wash);
}

.col-eyebrow {
  color: var(--accent-deep);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.col-title {
  margin-top: 1rem;
  font-family: "Smiley Sans", "Source Han Sans SC", sans-serif;
  font-size: clamp(2.7rem, 4.2vw, 4.1rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.02em;
}

.col-lead {
  max-width: 46ch;
  margin-top: 1.3rem;
  color: var(--muted);
  font-size: 1.0rem;
}

.col-demo video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  color-scheme: dark;
  background: var(--ink-950);
  border: 1px solid rgba(13, 20, 22, 0.14);
  border-radius: calc(var(--radius) - 4px);
  box-shadow: 0 14px 34px rgba(13, 20, 22, 0.14);
}

.video-status {
  display: block;
  margin-top: 0.95rem;
  color: var(--accent-deep);
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.col-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.6rem;
  align-items: center;
  margin-top: auto;
  padding-top: 1.9rem;
  border-top: 1px solid var(--line);
}

.col-contact h4 {
  color: var(--accent-deep);
}

.col-contact p {
  margin-top: 0.6rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.col-note {
  margin-top: -1.35rem;
  color: var(--muted);
  font-size: 0.74rem;
}

/* 中线分割与旋转双箭头圆环 */

.products-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-block: clamp(1.5rem, 3vw, 3rem);
}

.divider-seg {
  width: 1px;
  flex: 1;
  background: var(--line);
}

.fusion-orbit {
  position: relative;
  width: clamp(196px, 15vw, 234px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  margin-block: 1.4rem;
}

.fusion-orbit::before {
  content: "";
  position: absolute;
  inset: 6.5%;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.orbit-spin {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  animation: orbit-rotate 18s linear infinite;
}

@keyframes orbit-rotate {
  to {
    transform: rotate(-360deg);
  }
}

.orbit-tag {
  position: absolute;
  left: 50%;
  z-index: 1;
  padding-inline: 0.7rem;
  background: var(--paper);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  white-space: nowrap;
}

.orbit-tag-top {
  top: 0;
  color: var(--vita-deep);
  transform: translate(-50%, -50%);
}

.orbit-tag-bottom {
  bottom: 0;
  color: var(--omni-deep);
  transform: translate(-50%, 50%);
}

.orbit-text {
  position: relative;
  z-index: 1;
  max-width: 62%;
  color: var(--text);
  font-size: clamp(0.72rem, 0.85vw, 0.8rem);
  font-weight: 700;
  line-height: 1.75;
  text-align: center;
}

/* ===== 二维码（两款产品 + 公众号共用） ===== */

.qr-panel {
  width: 148px;
  transition: width 260ms cubic-bezier(.2, .8, .2, 1);
}

.qr-panel.is-expanded {
  width: min(300px, 72vw);
}

.qr-zoom {
  width: 100%;
  display: grid;
  gap: 0.55rem;
  padding: 0;
  color: var(--muted);
  background: transparent;
  border: 0;
  cursor: zoom-in;
}

.qr-panel.is-expanded .qr-zoom {
  cursor: zoom-out;
}

.qr-image-crop {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.qr-image-crop img {
  position: absolute;
  max-width: none;
}

.qr-image-vita img {
  width: 142%;
  height: auto;
  left: -21%;
  top: -82%;
}

.qr-image-omni img {
  width: 154%;
  height: auto;
  left: -27%;
  top: -75%;
}

.qr-image-official img {
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-label {
  font-size: 0.7rem;
}

.contact {
  padding-block: var(--section-space);
  color: var(--paper-soft);
  background: var(--ink-900);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(310px, 0.64fr);
  gap: 4rem 8vw;
}

.contact-intro p {
  max-width: 58ch;
  margin-top: 2rem;
  color: var(--muted-dark);
}

.official-contact {
  grid-column: 2;
  grid-row: 1 / 3;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 164px;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
}

.official-contact p {
  margin-top: 0.65rem;
  color: var(--muted-dark);
  font-size: 0.78rem;
}

.qr-official {
  width: 164px;
}

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

.contact-list > div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-dark);
}

.contact-list span {
  color: var(--muted-dark);
  font-size: 0.76rem;
}

.contact-list strong {
  font-size: 0.9rem;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.contact-list a {
  text-decoration-color: var(--vita);
}

.contact-list a:hover {
  color: #c5d5d2;
}

.copy-button {
  min-width: 58px;
  min-height: 44px;
  padding: 0.45rem 0.8rem;
  color: #c5d5d2;
  background: transparent;
  border: 1px solid var(--line-dark);
  border-radius: 4px;
  cursor: pointer;
}

.copy-button:hover {
  color: var(--ink-950);
  background: var(--paper-soft);
  border-color: var(--paper-soft);
}

.mobile-qr-help {
  grid-column: 1 / -1;
  color: var(--muted-dark);
  font-size: 0.76rem;
}

.site-footer {
  color: var(--muted-dark);
  background: var(--ink-950);
}

.footer-inner {
  display: grid;
  grid-template-columns: 0.8fr 1.3fr;
  gap: 2rem 6rem;
  align-items: end;
  padding-block: 3.5rem 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-brand img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.footer-brand p,
.footer-disclaimer,
.copyright,
.site-record {
  font-size: 0.72rem;
}

.footer-disclaimer {
  max-width: 74ch;
}

.footer-legal {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(199, 206, 202, 0.12);
}

.copyright,
.site-record {
  margin: 0;
}

.site-record {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem 1.15rem;
}

.site-record-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted-dark);
  text-decoration: none;
}

.site-record-link:hover {
  color: #d7dedb;
  text-decoration: underline;
}

.site-record-link img {
  display: block;
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
}

.copy-toast {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 150;
  padding: 0.75rem 1rem;
  color: var(--ink-950);
  background: var(--paper-soft);
  border-radius: 6px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 180ms ease-out, transform 180ms ease-out;
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.mobile-action-bar {
  display: none;
}

@media (max-width: 1100px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.72fr);
    gap: 3rem 5vw;
  }

  .about {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 4rem;
  }

  .products-grid {
    grid-template-columns: minmax(0, 1fr) clamp(170px, 15vw, 210px) minmax(0, 1fr);
  }

  .fusion-orbit {
    width: clamp(170px, 14vw, 196px);
  }

  .contact-inner {
    gap: 3rem;
  }
}

@media (max-width: 960px) {
  .site-header {
    grid-template-columns: 1fr auto auto;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) var(--page-gutter) auto;
    display: grid;
    gap: 0;
    padding: 0.5rem;
    background: var(--ink-800);
    border: 1px solid var(--line-dark);
    border-radius: var(--radius);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.25);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 180ms ease-out, transform 180ms ease-out;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--line-dark);
  }

  .site-nav a:last-child {
    border-bottom: 0;
  }

  .site-nav a::after {
    display: none;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    color: var(--paper-soft);
    background: transparent;
    border: 1px solid var(--line-dark);
    border-radius: 50%;
    cursor: pointer;
  }

  .nav-toggle svg {
    width: 21px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: round;
  }

  .hero-inner {
    min-height: 720px;
  }

  .about,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .about {
    gap: 3.5rem;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .product-col:hover {
    transform: none;
  }

  .products-divider {
    flex-direction: row;
    padding-block: 0;
    margin-block: 2.6rem;
  }

  .divider-seg {
    width: auto;
    height: 1px;
    align-self: center;
  }

  .fusion-orbit {
    width: clamp(190px, 36vw, 230px);
    margin-block: 0;
    margin-inline: 1.6rem;
  }

  .official-contact {
    grid-column: auto;
    grid-row: auto;
  }
}

@media (max-width: 760px) {
  :root {
    --header-height: 62px;
    --section-space: 5.7rem;
  }

  body {
    padding-bottom: 62px;
  }

  .site-header {
    height: var(--header-height);
    gap: 0.65rem;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .header-action {
    min-height: 40px;
    padding-inline: 0.75rem;
  }

  .hero::before {
    display: none;
  }

  .hero-inner {
    min-height: auto;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 3.5rem;
    padding-top: calc(var(--header-height) + 5rem);
    padding-bottom: 2.5rem;
  }

  .hero-copy p {
    margin-top: 1.6rem;
  }

  .product-index {
    align-self: auto;
  }

  .index-row {
    min-height: 96px;
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }

  .hero-meta > div,
  .hero-meta > div + div {
    padding: 1rem 0;
    border-left: 0;
    border-bottom: 1px solid var(--line-dark);
  }

  .about {
    gap: 3rem;
  }

  .contact-inner {
    gap: 3rem;
  }

  .mobile-action-bar {
    position: fixed;
    inset: auto 0 0;
    z-index: 90;
    min-height: 58px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    padding: 6px;
    color: var(--muted-dark);
    background: var(--ink-950);
    border-top: 1px solid rgba(199, 206, 202, 0.14);
  }

  .mobile-action-bar a {
    display: grid;
    place-items: center;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 750;
    text-decoration: none;
  }

  .mobile-action-bar a:last-child {
    color: var(--ink-950);
    background: var(--paper-soft);
  }

  .copy-toast {
    bottom: 4.8rem;
  }
}

@media (max-width: 560px) {
  :root {
    --page-gutter: 1rem;
  }

  h1 {
    font-size: clamp(3.35rem, 16vw, 4.7rem);
  }

  h2 {
    font-size: clamp(2.55rem, 12vw, 3.7rem);
  }

  .brand {
    gap: 0.55rem;
  }

  .brand strong {
    font-size: 0.8rem;
  }

  .brand small {
    font-size: 0.46rem;
  }

  .header-action {
    font-size: 0.76rem;
  }

  .hero-actions {
    align-items: stretch;
  }

  .hero-actions .button {
    flex: 1 1 calc(50% - 0.5rem);
    padding-inline: 0.65rem;
    font-size: 0.82rem;
  }

  .index-row {
    grid-template-columns: 1fr auto;
    gap: 0.6rem;
    padding-block: 0.9rem;
  }

  .index-desc {
    grid-column: 1 / -1;
  }

  .index-row svg {
    grid-column: 2;
    grid-row: 2;
  }

  .fact-list > div {
    grid-template-columns: 88px 1fr;
    gap: 1rem;
  }

  .products-sub {
    font-size: 0.92rem;
  }

  .product-col {
    gap: 1.7rem;
    padding: 1.5rem;
  }

  .col-title {
    font-size: clamp(2.4rem, 11vw, 3.2rem);
  }

  .col-contact {
    grid-template-columns: minmax(0, 1fr) 120px;
    gap: 1.2rem;
  }

  .col-contact .qr-panel {
    width: 120px;
  }

  .col-contact .qr-panel.is-expanded {
    grid-column: 1 / -1;
    width: min(300px, 82vw);
    margin-inline: auto;
  }

  .col-note {
    margin-top: -0.9rem;
  }

  .fusion-orbit {
    width: clamp(180px, 52vw, 220px);
    margin-inline: 0.9rem;
  }

  .orbit-tag {
    font-size: 0.72rem;
    letter-spacing: 0.16em;
  }

  .official-contact {
    grid-template-columns: 1fr 116px;
    gap: 1.2rem;
    padding: 1.3rem;
  }

  .official-contact .qr-panel {
    width: 116px;
  }

  .official-contact .qr-panel.is-expanded {
    grid-column: 1 / -1;
    width: min(300px, 82vw);
    margin-inline: auto;
  }

  .contact-list > div {
    grid-template-columns: 1fr auto;
  }

  .contact-list span {
    grid-column: 1 / -1;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .orbit-spin {
    animation: none;
  }

  .index-row::before,
  .qr-panel,
  .copy-toast,
  .site-nav,
  .button,
  .header-action,
  .product-col {
    transition: none;
  }
}