:root {
  --ink: #111514;
  --ink-soft: #27302e;
  --paper: #f2f1ed;
  --paper-strong: #ffffff;
  --line: rgba(17, 21, 20, 0.14);
  --line-inverse: rgba(255, 255, 255, 0.17);
  --muted: #66706d;
  --muted-inverse: #b8c0bd;
  --signal: #dc3f2f;
  --signal-dark: #b72b22;
  --mint: #b9d7ca;
  --steel: #748784;
  --max-width: 1240px;
  --header-height: 76px;
  --radius: 8px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

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

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

p,
h1,
h2,
h3,
ul,
ol,
figure {
  margin: 0;
}

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

.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;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: #fff;
  background: var(--signal);
  border-radius: 4px;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.section-shell,
.nav-shell {
  width: min(calc(100% - 56px), var(--max-width));
  margin: 0 auto;
}

.section {
  padding: 118px 0;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--mint);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  line-height: 1.3;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  background: currentColor;
  content: "";
}

.eyebrow-dark {
  color: var(--signal-dark);
}

.eyebrow span {
  color: var(--signal);
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 750;
  line-height: 1;
  transition:
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--signal);
}

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

.button-ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.46);
}

.button-ghost:hover {
  background: rgba(255, 255, 255, 0.13);
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  color: #fff;
  border-bottom: 1px solid transparent;
  transition:
    background 220ms ease,
    border-color 220ms ease,
    box-shadow 220ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(16, 20, 19, 0.94);
  border-bottom-color: var(--line-inverse);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(14px);
}

.nav-shell {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 150px;
  height: 37px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
  font-weight: 650;
}

.site-nav > a:not(.nav-cta) {
  position: relative;
}

.site-nav > a:not(.nav-cta)::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  background: var(--signal);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav > a:not(.nav-cta):hover::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 10px 17px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 4px;
  transition:
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease;
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  color: #fff;
  background: transparent;
}

.nav-toggle > span:not(.sr-only) {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  transition:
    transform 180ms ease,
    opacity 180ms ease;
}

.nav-toggle[aria-expanded="true"] > span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] > span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] > span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  display: flex;
  min-height: calc(100svh - 88px);
  align-items: flex-end;
  overflow: hidden;
  color: #fff;
  background: #101413;
}

.hero-media,
.hero-shade,
.contact-media,
.contact-shade {
  position: absolute;
  inset: 0;
}

.hero-media img,
.contact-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media img {
  object-position: 58% 50%;
  transform: scale(1.02);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(10, 14, 13, 0.94) 0%, rgba(10, 14, 13, 0.78) 44%, rgba(10, 14, 13, 0.28) 75%, rgba(10, 14, 13, 0.44) 100%),
    linear-gradient(0deg, rgba(10, 14, 13, 0.78) 0%, transparent 46%);
}

.hero-shell {
  position: relative;
  z-index: 2;
  display: flex;
  width: min(calc(100% - 56px), var(--max-width));
  min-height: calc(100svh - 88px);
  flex-direction: column;
  justify-content: flex-end;
  margin: 0 auto;
  padding: calc(var(--header-height) + 72px) 0 42px;
}

.hero-copy {
  width: min(760px, 70%);
  padding-bottom: 84px;
}

.hero h1 {
  max-width: 820px;
  font-size: clamp(46px, 6.1vw, 82px);
  font-weight: 860;
  letter-spacing: -0.055em;
  line-height: 1.07;
}

.hero h1 span {
  color: var(--mint);
}

.hero-lead {
  max-width: 650px;
  margin-top: 30px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.hero-bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--line-inverse);
}

.hero-proof {
  display: grid;
  width: min(680px, 72%);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero-proof li {
  display: grid;
  gap: 4px;
  padding-right: 26px;
}

.hero-proof li + li {
  padding-left: 26px;
  border-left: 1px solid var(--line-inverse);
}

.hero-proof strong {
  color: #fff;
  font-family: "Arial Narrow", "DIN Condensed", sans-serif;
  font-size: 25px;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.1;
}

.hero-proof span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
}

.scroll-cue b {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 50%;
  font-size: 16px;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.scroll-cue:hover b {
  background: var(--signal);
  border-color: var(--signal);
  transform: translateY(3px);
}

.trust-strip {
  color: #fff;
  background: #161b1a;
  border-bottom: 1px solid var(--line-inverse);
}

.trust-grid {
  display: grid;
  grid-template-columns: 1.05fr repeat(3, 1fr);
}

.trust-intro,
.trust-item {
  min-height: 164px;
  padding: 32px 28px;
  border-left: 1px solid var(--line-inverse);
}

.trust-intro {
  display: flex;
  align-items: center;
  padding-left: 0;
  color: #fff;
  border-left: 0;
  font-size: 17px;
  font-weight: 650;
  line-height: 1.6;
}

.trust-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.trust-index {
  margin-bottom: 10px;
  color: var(--signal);
  font-family: "Arial Narrow", "DIN Condensed", sans-serif;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.trust-item strong {
  font-size: 17px;
}

.trust-item p {
  margin-top: 7px;
  color: var(--muted-inverse);
  font-size: 13px;
  line-height: 1.65;
}

.products {
  background: var(--paper);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 72px;
  align-items: end;
  margin-bottom: 54px;
}

.section-heading h2,
.production-copy h2,
.quality-heading h2,
.digital-copy h2,
.contact h2 {
  font-size: clamp(34px, 4.1vw, 56px);
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 1.16;
}

.section-heading > p,
.section-lead,
.quality-heading > p,
.digital-copy > p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

.product-grid {
  display: grid;
  grid-auto-rows: 430px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.product-card {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: #242a29;
  border-radius: var(--radius);
  isolation: isolate;
}

.product-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 800ms var(--ease);
}

.product-card:hover img {
  transform: scale(1.035);
}

.product-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(7, 10, 10, 0.03) 22%, rgba(7, 10, 10, 0.9) 100%),
    linear-gradient(90deg, rgba(7, 10, 10, 0.38), transparent 70%);
}

.product-content {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 32px;
}

.product-label {
  margin-bottom: 12px;
  color: var(--mint);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.product-content h3 {
  font-family: "Arial Narrow", "DIN Condensed", "Microsoft YaHei", sans-serif;
  font-size: clamp(30px, 3.1vw, 43px);
  font-weight: 850;
  letter-spacing: -0.025em;
  line-height: 1.05;
}

.product-content > p:not(.product-label) {
  max-width: 620px;
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
}

.spec-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.spec-list li {
  padding: 6px 10px;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  font-size: 11px;
  line-height: 1.35;
  backdrop-filter: blur(8px);
}

.material-note {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  margin-top: 22px;
  padding: 24px 26px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.material-note > span {
  color: var(--signal-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.material-note p {
  color: var(--muted);
  font-size: 14px;
}

.material-note a {
  color: var(--ink);
  border-bottom: 2px solid var(--signal);
  font-size: 14px;
  font-weight: 750;
}

/* ---------------------------------------------------------------- 模型站入口 */

/* 站点切换器：与模型站 header 的 .brand-switch 完全同一套样式 */
.brand-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: auto;
  margin-left: 24px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line-inverse);
  border-radius: 999px;
}

.brand-switch-current,
.brand-switch-link {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 750;
  line-height: 1.2;
  white-space: nowrap;
}

.brand-switch-current {
  color: var(--ink);
  background: var(--mint);
}

.brand-switch-link {
  color: #fff;
  transition:
    color 180ms ease,
    background 180ms ease;
}

.brand-switch-link:hover {
  color: var(--ink);
  background: var(--mint);
}

/* 模型站未上线时，入口标注「即将上线」并锚点跳转到本页 #models 区块 */
.brand-switch-link[data-models-pending="true"] {
  color: rgba(255, 255, 255, 0.72);
}

.button-mint {
  color: var(--ink);
  background: var(--mint);
}

.button-mint:hover {
  background: #a7cbbd;
}

/* 模型站引导区块：深色带 + 大号入口，给模型站一个显眼且固定的位置 */
.models-band {
  color: #fff;
  background:
    radial-gradient(circle at 82% 12%, rgba(185, 215, 202, 0.14), transparent 52%),
    #161b1a;
  border-top: 1px solid var(--line-inverse);
  border-bottom: 1px solid var(--line-inverse);
}

.models-band-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  gap: 72px;
  align-items: center;
  padding-top: 88px;
  padding-bottom: 88px;
}

.models-band h2 {
  font-size: clamp(32px, 3.6vw, 50px);
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 1.16;
}

.models-band-lead {
  max-width: 640px;
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 16px;
  line-height: 1.85;
}

.models-band-list {
  display: grid;
  gap: 18px;
}

.models-band-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-inverse);
}

.models-band-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.models-band-list span {
  color: var(--signal);
  font-family: "Arial Narrow", "DIN Condensed", sans-serif;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.14em;
}

.models-band-list strong {
  display: block;
  font-size: 16px;
}

.models-band-list p {
  margin-top: 5px;
  color: var(--muted-inverse);
  font-size: 13px;
  line-height: 1.65;
}

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

@media (max-width: 1080px) {
  .models-band-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

.production {
  background:
    linear-gradient(rgba(16, 20, 19, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 20, 19, 0.032) 1px, transparent 1px),
    #e8e7e1;
  background-size: 44px 44px;
}

.production-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(380px, 1.06fr);
  gap: 76px;
  align-items: center;
}

.production-copy .section-lead {
  margin-top: 24px;
}

.process-list {
  display: grid;
  gap: 0;
  margin-top: 42px;
  border-top: 1px solid var(--line);
}

.process-list li {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.process-list li > span {
  padding-top: 2px;
  color: var(--signal-dark);
  font-family: "Arial Narrow", "DIN Condensed", sans-serif;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.14em;
}

.process-list strong {
  font-size: 16px;
}

.process-list p {
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

.production-visual {
  position: relative;
  min-height: 700px;
  overflow: hidden;
  background: #252b2a;
  border-radius: var(--radius);
}

.production-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.05);
}

.production-visual::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 52%, rgba(8, 11, 10, 0.86));
  content: "";
}

.production-visual figcaption {
  position: absolute;
  z-index: 2;
  right: 30px;
  bottom: 30px;
  left: 30px;
  color: #fff;
}

.production-visual figcaption span {
  display: block;
  margin-bottom: 7px;
  color: var(--mint);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.production-visual figcaption strong {
  font-size: 26px;
  font-weight: 780;
  letter-spacing: -0.025em;
}

.quality {
  color: #fff;
  background: #101413;
}

.quality-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 80px;
  align-items: end;
}

.quality-heading > p {
  color: var(--muted-inverse);
}

.trace-board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: 72px;
}

.trace-rail {
  position: absolute;
  top: 26px;
  right: 10%;
  left: 10%;
  height: 1px;
  background: var(--line-inverse);
}

.trace-step {
  position: relative;
  z-index: 1;
  min-height: 194px;
  padding: 0 24px;
  text-align: center;
}

.trace-number {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  margin: 0 auto 24px;
  color: #fff;
  background: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  font-family: "Arial Narrow", "DIN Condensed", sans-serif;
  font-size: 12px;
  font-weight: 850;
}

.trace-step:first-of-type .trace-number {
  background: var(--signal);
  border-color: var(--signal);
}

.trace-step p {
  color: var(--mint);
  font-size: 13px;
  font-weight: 750;
}

.trace-step strong {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.65;
}

.quality-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 58px;
  border-top: 1px solid var(--line-inverse);
  border-bottom: 1px solid var(--line-inverse);
}

.quality-metrics > div {
  padding: 26px 24px;
}

.quality-metrics > div + div {
  border-left: 1px solid var(--line-inverse);
}

.quality-metrics strong,
.quality-metrics span {
  display: block;
}

.quality-metrics strong {
  font-size: 16px;
}

.quality-metrics span {
  margin-top: 7px;
  color: var(--muted-inverse);
  font-size: 12px;
}

.digital {
  background: var(--paper-strong);
}

.digital-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(460px, 1.22fr);
  gap: 84px;
  align-items: center;
}

.digital-copy > p {
  margin-top: 24px;
}

.digital-list {
  display: grid;
  margin-top: 38px;
  border-top: 1px solid var(--line);
}

.digital-list li {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 18px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.digital-list span {
  color: var(--signal-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.digital-list p {
  color: var(--muted);
  font-size: 13px;
}

.flow-panel {
  padding: 40px;
  color: #fff;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    #171c1b;
  background-size: 40px 40px;
  border-radius: var(--radius);
}

.flow-title {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-inverse);
  font-size: 16px;
  font-weight: 700;
}

.flow-line {
  position: relative;
  display: grid;
  gap: 0;
  margin-top: 10px;
}

.flow-line::before {
  position: absolute;
  top: 26px;
  bottom: 26px;
  left: 22px;
  width: 1px;
  background: rgba(255, 255, 255, 0.2);
  content: "";
}

.flow-line > div {
  position: relative;
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 14px;
  align-items: center;
  min-height: 74px;
  padding: 10px 0;
}

.flow-line span {
  position: relative;
  z-index: 1;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: #fff;
  background: #171c1b;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  font-family: "Arial Narrow", "DIN Condensed", sans-serif;
  font-size: 11px;
  font-weight: 850;
}

.flow-line > div:nth-child(-n+3) span {
  background: var(--signal);
  border-color: var(--signal);
}

.flow-line strong {
  font-size: 15px;
}

.flow-line small {
  color: var(--muted-inverse);
  font-size: 12px;
  text-align: right;
}

.flow-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 22px;
  color: var(--mint);
  border-top: 1px solid var(--line-inverse);
  font-size: 12px;
  font-weight: 700;
}

.flow-footer i {
  flex: 1;
  height: 1px;
  background: var(--line-inverse);
}

.contact {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: #101413;
}

.contact-media img {
  object-position: center 43%;
  filter: saturate(0.62);
}

.contact-shade {
  background: rgba(10, 14, 13, 0.78);
}

.contact-shell {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 520px;
  grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 80px;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 80px;
}

.contact h2 {
  max-width: 780px;
}

.contact-shell > div:first-child > p:last-child {
  max-width: 680px;
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.72);
}

.contact-actions {
  display: grid;
  justify-items: end;
  gap: 18px;
}

.contact-mail {
  color: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.38);
  font-size: 14px;
}

.contact-mail.is-copied,
.footer-meta a.is-copied,
.sales-methods a.is-copied {
  color: var(--mint);
}

.site-footer {
  color: rgba(255, 255, 255, 0.72);
  background: #0c0f0f;
  border-top: 1px solid var(--line-inverse);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
  align-items: start;
  padding-top: 52px;
  padding-bottom: 52px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-brand img {
  width: 150px;
  height: 37px;
  object-fit: contain;
}

.footer-brand strong {
  color: #fff;
  font-family: "Arial Narrow", "DIN Condensed", sans-serif;
  font-size: 23px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.footer-brand p {
  margin-top: 2px;
  font-size: 12px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 24px;
  font-size: 13px;
}

.footer-links a:hover,
.footer-meta a:hover {
  color: #fff;
}

.footer-meta {
  display: grid;
  justify-items: end;
  gap: 8px;
  font-size: 12px;
  text-align: right;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 650ms var(--ease),
    transform 650ms var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero-copy {
    width: min(720px, 78%);
  }

  .trust-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .trust-intro {
    grid-column: 1 / -1;
    min-height: auto;
    padding: 28px 0;
    border-bottom: 1px solid var(--line-inverse);
  }

  .trust-item:first-of-type {
    border-left: 0;
  }

  .production-grid,
  .digital-grid {
    gap: 52px;
  }

  .production-visual {
    min-height: 610px;
  }

  .trace-step {
    padding: 0 12px;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 68px;
  }

  /* 窄屏下压缩 logo 与切换器，保证 logo + 切换器 + 汉堡按钮同排不溢出 */
  .brand img {
    width: 118px;
    height: 30px;
  }

  .brand-switch {
    margin-left: 10px;
    gap: 4px;
    padding: 3px;
  }

  .brand-switch-current,
  .brand-switch-link {
    padding: 5px 9px;
    font-size: 11.5px;
  }

  .section {
    padding: 88px 0;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    bottom: auto;
    left: 0;
    display: flex;
    height: calc(100svh - var(--header-height));
    visibility: hidden;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 28px;
    color: #fff;
    background: #101413;
    opacity: 0;
    transform: translateY(-10px);
    transition:
      opacity 180ms ease,
      visibility 180ms ease,
      transform 180ms ease;
  }

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

  .site-nav > a {
    padding: 20px 0;
    border-bottom: 1px solid var(--line-inverse);
    font-size: 20px;
  }

  .site-nav > a:not(.nav-cta)::after {
    display: none;
  }

  .nav-cta {
    margin-top: 22px;
    padding: 16px;
    border-color: var(--signal);
    background: var(--signal);
    text-align: center;
  }

  .hero {
    min-height: calc(100svh - 76px);
  }

  .hero-shell {
    min-height: calc(100svh - 76px);
    padding-top: calc(var(--header-height) + 72px);
    padding-bottom: 30px;
  }

  .hero-copy {
    width: 100%;
    padding-bottom: 60px;
  }

  .hero h1 {
    font-size: clamp(42px, 10.2vw, 66px);
  }

  .hero-proof {
    width: 100%;
  }

  .scroll-cue {
    display: none;
  }

  .section-heading,
  .quality-heading,
  .production-grid,
  .digital-grid,
  .contact-shell {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .quality-heading {
    gap: 26px;
  }

  .section-heading > p {
    max-width: 720px;
  }

  .product-grid {
    grid-auto-rows: 420px;
  }

  .production-visual {
    min-height: 540px;
  }

  .trace-board {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 52px;
  }

  .trace-rail {
    top: 24px;
    bottom: 24px;
    left: 25px;
    width: 1px;
    height: auto;
  }

  .trace-step {
    display: grid;
    min-height: auto;
    grid-template-columns: 52px 1fr;
    column-gap: 18px;
    padding: 18px 0;
    text-align: left;
  }

  .trace-number {
    grid-row: 1 / 3;
    margin: 0;
  }

  .trace-step strong {
    margin-top: 3px;
  }

  .quality-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quality-metrics > div:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line-inverse);
  }

  .quality-metrics > div:nth-child(4) {
    border-top: 1px solid var(--line-inverse);
  }

  .digital-grid {
    gap: 48px;
  }

  .flow-panel {
    padding: 30px;
  }

  .contact-shell {
    min-height: 500px;
    gap: 40px;
  }

  .contact-actions {
    justify-items: start;
  }

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

  .footer-meta {
    grid-column: 1 / -1;
    justify-items: start;
    text-align: left;
  }
}

@media (max-width: 600px) {
  .section-shell,
  .nav-shell,
  .hero-shell {
    width: min(calc(100% - 36px), var(--max-width));
  }

  .section {
    padding: 72px 0;
  }

  .brand img {
    width: 122px;
    height: 30px;
  }

  .brand-copy strong {
    font-size: 18px;
  }

  .hero {
    min-height: calc(100svh - 62px);
  }

  .hero-shell {
    min-height: calc(100svh - 62px);
    padding-top: calc(var(--header-height) + 52px);
    padding-bottom: 24px;
  }

  .hero-media img {
    object-position: 62% 52%;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(10, 14, 13, 0.93), rgba(10, 14, 13, 0.64)),
      linear-gradient(0deg, rgba(10, 14, 13, 0.88) 0%, transparent 62%);
  }

  .hero-copy {
    padding-bottom: 44px;
  }

  .hero h1 {
    font-size: clamp(38px, 11.8vw, 53px);
    line-height: 1.12;
  }

  .hero-lead {
    margin-top: 22px;
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    gap: 10px;
    margin-top: 28px;
  }

  .button {
    width: 100%;
    min-height: 48px;
    padding: 0 18px;
  }

  .hero-bottom {
    padding-top: 20px;
  }

  .hero-proof {
    gap: 0;
  }

  .hero-proof li {
    padding-right: 12px;
  }

  .hero-proof li + li {
    padding-left: 12px;
  }

  .hero-proof strong {
    font-size: 17px;
  }

  .hero-proof span {
    font-size: 10px;
  }

  .trust-intro,
  .trust-item {
    min-height: auto;
    padding: 26px 20px;
  }

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

  .trust-item {
    border-top: 1px solid var(--line-inverse);
    border-left: 0;
  }

  .section-heading {
    margin-bottom: 36px;
  }

  .section-heading h2,
  .production-copy h2,
  .quality-heading h2,
  .digital-copy h2,
  .contact h2 {
    font-size: clamp(31px, 9.2vw, 42px);
  }

  .product-grid {
    grid-auto-rows: 470px;
    grid-template-columns: 1fr;
  }

  .product-content {
    padding: 24px;
  }

  .product-content h3 {
    font-size: 34px;
  }

  .material-note {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 22px;
  }

  .production-grid {
    gap: 38px;
  }

  .process-list li {
    grid-template-columns: 38px 1fr;
    gap: 12px;
  }

  .production-visual {
    min-height: 440px;
  }

  .production-visual figcaption {
    right: 22px;
    bottom: 22px;
    left: 22px;
  }

  .production-visual figcaption strong {
    font-size: 22px;
  }

  .quality-heading {
    gap: 18px;
  }

  .trace-step {
    padding: 16px 0;
  }

  .quality-metrics {
    grid-template-columns: 1fr;
  }

  .quality-metrics > div + div,
  .quality-metrics > div:nth-child(3) {
    border-top: 1px solid var(--line-inverse);
    border-left: 0;
  }

  .digital-list li {
    grid-template-columns: 64px 1fr;
    gap: 12px;
  }

  .flow-panel {
    padding: 24px 20px;
  }

  .flow-line > div {
    grid-template-columns: 42px 1fr;
    gap: 10px;
  }

  .flow-line small {
    grid-column: 2;
    text-align: left;
  }

  .flow-footer {
    display: grid;
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .flow-footer i {
    display: none;
  }

  .contact-shell {
    min-height: 560px;
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .contact-actions {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-meta {
    grid-column: auto;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}