:root {
  --space-black: #111111;
  --graphite: #333333;
  --snow: #f7f7f7;
  --blue: #4da3ff;
  --line: rgba(255, 255, 255, 0.14);
  --muted: rgba(247, 247, 247, 0.72);
  --panel: #1b1b1b;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--space-black);
  color: var(--snow);
  letter-spacing: 0;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 16px clamp(20px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: rgba(17, 17, 17, 0.82);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
  font-weight: 800;
}

.mark {
  display: grid;
  grid-template-columns: repeat(2, 8px);
  gap: 4px;
}

.mark span {
  width: 8px;
  height: 8px;
  background: var(--snow);
}

.mark span:nth-child(2),
.mark span:nth-child(3) {
  background: transparent;
  border: 1px solid var(--snow);
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
  color: var(--muted);
  font-size: 14px;
}

.nav a:hover {
  color: var(--blue);
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 120px clamp(20px, 5vw, 72px) 72px;
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(17, 17, 17, 0.88), rgba(17, 17, 17, 0.44) 46%, rgba(17, 17, 17, 0.18)),
    linear-gradient(0deg, rgba(17, 17, 17, 0.98), rgba(17, 17, 17, 0.02) 42%);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 92px);
  line-height: 0.98;
}

.hero-copy p:not(.eyebrow) {
  max-width: 650px;
  color: var(--muted);
  font-size: clamp(17px, 2.1vw, 24px);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
}

.primary {
  background: var(--blue);
  color: #06111e;
}

.secondary {
  border-color: var(--line);
  color: var(--snow);
  background: rgba(255, 255, 255, 0.06);
}

.section {
  padding: 86px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 860px;
  margin-bottom: 34px;
}

.section[id] {
  scroll-margin-top: 72px;
}

.section h2 {
  max-width: 760px;
  font-size: clamp(28px, 4vw, 54px);
  line-height: 1.08;
  margin-bottom: 0;
}

.intro,
.content {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(280px, 1fr);
  gap: clamp(28px, 6vw, 80px);
  align-items: start;
}

.intro > p,
.content-list {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.four-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.product-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: var(--panel);
}

.product-image {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #242424;
}

.product-visual {
  position: relative;
  height: 180px;
  margin-bottom: 22px;
  overflow: hidden;
  border-radius: 8px;
  background: #242424;
}

.product-visual::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(77, 163, 255, 0.34);
}

.hub-visual span,
.rack-visual span,
.workstation-visual span {
  position: absolute;
  display: block;
  background: #101010;
  border: 1px solid rgba(247, 247, 247, 0.18);
  box-shadow: inset 0 0 0 1px rgba(77, 163, 255, 0.08);
}

.hub-visual span:nth-child(1) {
  left: 34px;
  top: 44px;
  width: 52%;
  height: 76px;
}

.hub-visual span:nth-child(2) {
  right: 34px;
  top: 62px;
  width: 22%;
  height: 40px;
  background: var(--blue);
}

.hub-visual span:nth-child(3) {
  left: 34px;
  bottom: 34px;
  width: 70%;
  height: 8px;
}

.rack-visual span {
  left: 26%;
  width: 48%;
  height: 24px;
}

.rack-visual span:nth-child(1) { top: 38px; }
.rack-visual span:nth-child(2) { top: 72px; }
.rack-visual span:nth-child(3) { top: 106px; }
.rack-visual span:nth-child(4) {
  top: 140px;
  background: var(--blue);
}

.workstation-visual span:nth-child(1) {
  left: 14%;
  top: 74px;
  width: 72%;
  height: 14px;
}

.workstation-visual span:nth-child(2),
.workstation-visual span:nth-child(3) {
  top: 88px;
  width: 10px;
  height: 64px;
}

.workstation-visual span:nth-child(2) { left: 25%; }
.workstation-visual span:nth-child(3) { right: 25%; }
.workstation-visual span:nth-child(4) {
  left: 32%;
  top: 38px;
  width: 36%;
  height: 26px;
  background: var(--blue);
}

.series {
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.product-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.product-card p:not(.series),
.product-card li,
.case-strip p {
  color: var(--muted);
  line-height: 1.7;
}

.product-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.text-link {
  display: inline-flex;
  margin-top: 20px;
  color: var(--blue);
  font-weight: 900;
}

.product-hero {
  min-height: 88vh;
}

.feature-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.size-plans {
  background: #171717;
}

.product-card li {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
}

.configurator {
  background: #f7f7f7;
  color: #111111;
}

.configurator .eyebrow {
  color: #1269bf;
}

.inquiry-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 980px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 800;
}

.wide,
.form-note {
  grid-column: 1 / -1;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #c9c9c9;
  border-radius: 8px;
  padding: 13px 14px;
  background: #ffffff;
  color: #111111;
  font: inherit;
}

textarea {
  resize: vertical;
}

.option-fieldset {
  margin: 0;
  border: 1px solid #c9c9c9;
  border-radius: 8px;
  padding: 16px;
}

.option-fieldset legend {
  padding: 0 6px;
  font-weight: 800;
}

.field-help {
  margin-bottom: 14px;
  color: #555555;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
}

.material-list {
  display: grid;
  gap: 10px;
}

.material-row {
  display: grid;
  grid-template-columns: 0.9fr 1.5fr 0.8fr 0.6fr 36px;
  gap: 8px;
}

.material-type {
  display: flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid #c9c9c9;
  border-radius: 8px;
  background: #eeeeee;
  color: #333333;
  font-size: 14px;
  font-weight: 800;
}

.material-row input,
.material-row select {
  min-width: 0;
}

.material-add,
.material-remove {
  border: 1px solid #b9b9b9;
  border-radius: 8px;
  background: #ffffff;
  color: #222222;
  cursor: pointer;
  font-weight: 800;
}

.material-add {
  margin-top: 12px;
  padding: 10px 14px;
}

.material-remove {
  min-height: 42px;
  font-size: 20px;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.checkbox-grid label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #333333;
  font-size: 14px;
  font-weight: 700;
}

.checkbox-grid input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--blue);
}

.form-guidance {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid #1269bf;
  background: rgba(77, 163, 255, 0.1);
  color: #333333;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.7;
}

.form-button {
  width: fit-content;
  border: 0;
}

.form-note {
  min-height: 24px;
  color: #1b5d15;
  font-weight: 800;
}

.case-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.case-strip article {
  border-left: 2px solid var(--blue);
  padding: 4px 0 4px 22px;
}

.case-strip span {
  color: var(--blue);
  font-weight: 900;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.compact-gallery {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.full-gallery {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.gallery-grid figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
}

.gallery-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.gallery-grid figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.content-list {
  margin: 0;
  padding-left: 24px;
}

.content-list li + li {
  margin-top: 12px;
}

.article-page {
  padding: 132px clamp(20px, 5vw, 72px) 72px;
}

.article {
  max-width: 880px;
  margin: 0 auto;
}

.article h1 {
  font-size: clamp(40px, 6vw, 76px);
  margin-bottom: 22px;
}

.article h2 {
  margin-top: 46px;
  font-size: clamp(24px, 3vw, 36px);
}

.article p,
.article li {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.article-lead {
  font-size: 21px;
}

.article img {
  display: block;
  width: 100%;
  margin: 34px 0 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.article-cta {
  margin-top: 54px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.article-cta h2 {
  margin-top: 0;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding: 34px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.brand-line {
  margin-bottom: 6px;
  font-size: 22px;
  font-weight: 900;
}

.footer p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.dashboard-page {
  padding-top: 72px;
}

.thanks-page {
  min-height: 78vh;
  display: grid;
  align-items: center;
  padding-top: 72px;
}

.thanks-panel {
  max-width: 900px;
  border-top: 0;
}

.thanks-panel h1 {
  margin-bottom: 20px;
  font-size: clamp(44px, 7vw, 92px);
}

.thanks-panel p:not(.eyebrow) {
  max-width: 720px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.8;
}

.materials-page {
  padding-top: 72px;
}

.materials-hero {
  padding-top: 104px;
}

.materials-hero h1 {
  margin-bottom: 22px;
  font-size: clamp(48px, 7vw, 92px);
}

.materials-hero > p:last-child,
.material-cta p:last-child {
  max-width: 820px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.8;
}

.materials-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.materials-table {
  width: 100%;
  min-width: 920px;
  border-collapse: collapse;
}

.materials-table th,
.materials-table td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.materials-table th {
  color: var(--blue);
  font-size: 13px;
  text-transform: uppercase;
}

.materials-table td {
  color: var(--muted);
  line-height: 1.65;
}

.materials-table strong {
  color: var(--snow);
}

.materials-subheading {
  margin-top: 42px;
}

.material-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.material-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: var(--panel);
}

.material-card p:last-child,
.accessory-catalog p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.accessory-catalog {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.accessory-catalog article {
  border-left: 2px solid var(--blue);
  padding-left: 18px;
}

.material-cta {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  background: #171717;
}

.dashboard-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
}

.dashboard-head h1 {
  margin-bottom: 16px;
  font-size: clamp(40px, 6vw, 76px);
}

.dashboard-head p:not(.eyebrow) {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.dashboard-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.lead-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
}

.lead-table th,
.lead-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.lead-table th {
  color: var(--blue);
  font-size: 13px;
  text-transform: uppercase;
}

.lead-table td {
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
  }

  .nav {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .intro,
  .content,
  .product-grid,
  .four-grid,
  .case-strip,
  .feature-grid,
  .gallery-grid,
  .compact-gallery,
  .full-gallery,
  .checkbox-grid,
  .inquiry-form {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 88vh;
    padding-top: 148px;
  }

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

  .dashboard-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .material-card-grid,
  .accessory-catalog {
    grid-template-columns: 1fr;
  }

  .material-cta {
    align-items: flex-start;
    flex-direction: column;
  }

  .material-row {
    grid-template-columns: 1fr 1fr;
  }

  .material-remove {
    grid-column: 2;
    width: 42px;
    justify-self: end;
  }
}

@media (max-width: 560px) {
  .site-header {
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
    font-size: 13px;
  }

  .hero {
    padding-top: 184px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
}