:root {
  --ink: #14272b;
  --muted: #5d6b6c;
  --paper: #f8f5ed;
  --paper-deep: #eee9de;
  --white: #fff;
  --line: #cbd2cd;
  --teal: #087f7a;
  --teal-dark: #005c59;
  --blueprint: #2c64a2;
  --industrial: #d56d2a;
  --badge-background: #a74316;
  --badge-foreground: #ffffff;
  --page-pad: clamp(20px, 5vw, 72px);
  color-scheme: light;
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-padding-top: 104px;
}

body {
  background: var(--paper);
  color: var(--ink);
  margin: 0;
}

main,
section,
figure {
  min-width: 0;
}

a {
  color: var(--teal-dark);
  text-underline-offset: 0.18em;
}

img,
video,
canvas,
svg {
  height: auto;
  max-width: 100%;
}

.site-header {
  align-items: center;
  background: rgba(248, 245, 237, 0.96);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 16px 28px;
  grid-template-columns: minmax(130px, 1fr) auto auto;
  padding: 18px var(--page-pad);
  position: static;
  z-index: 10;
}

.brand {
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 850;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.site-nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  justify-content: center;
}

.site-nav a {
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 700;
  padding: 8px 0;
  text-decoration: none;
}

.button,
button {
  background: var(--teal);
  border: 1px solid var(--teal);
  border-radius: 7px;
  color: var(--white);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 780;
  justify-content: center;
  line-height: 1.35;
  max-width: 100%;
  min-height: 46px;
  padding: 12px 20px;
  text-align: center;
  white-space: normal;
}

.button--compact {
  min-height: 40px;
  padding: 9px 15px;
}

.construction-hero {
  align-items: center;
  display: grid;
  gap: clamp(38px, 6vw, 84px);
  grid-template-columns: minmax(520px, 1.05fr) minmax(420px, 0.95fr);
  margin: 0 auto;
  max-width: 1440px;
  min-height: 680px;
  padding: clamp(68px, 8vw, 112px) var(--page-pad);
}

.construction-hero__copy {
  max-width: 610px;
}

.construction-kicker {
  color: var(--blueprint);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  margin: 0 0 20px;
  text-transform: uppercase;
}

.construction-hero h1,
.construction-section h2 {
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.construction-hero h1 {
  font-size: clamp(2.8rem, 4.8vw, 4.9rem);
  margin: 0;
}

.construction-title-line {
  display: block;
  white-space: nowrap;
}

.construction-lead {
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.18rem);
  line-height: 1.8;
  margin: 28px 0 34px;
}

.construction-hero__media {
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 28px 72px rgba(20, 39, 43, 0.13);
  margin: 0;
  padding: 10px;
}

.construction-hero__media img {
  aspect-ratio: 16 / 9;
  display: block;
  object-fit: contain;
  width: 100%;
}

.construction-hero__media figcaption,
.construction-evidence figcaption {
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.6;
}

.construction-hero__media figcaption {
  padding: 12px 6px 3px;
}

.construction-section {
  margin: 0 auto;
  max-width: 1280px;
  padding: clamp(82px, 9vw, 122px) var(--page-pad);
}

.construction-section h2 {
  font-size: clamp(2.25rem, 4.5vw, 4rem);
  margin: 0;
  max-width: 820px;
}

.construction-section > p {
  color: var(--muted);
  line-height: 1.75;
  max-width: 900px;
}

.construction-capabilities {
  display: grid;
  gap: 28px clamp(34px, 6vw, 78px);
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
}

.construction-capabilities > h2,
.construction-capabilities > .construction-capability-list,
.construction-capabilities > p {
  grid-column: 1;
}

.construction-capability-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.construction-capability-list li {
  border-top: 1px solid var(--line);
  font-weight: 740;
  line-height: 1.5;
  padding: 17px 0;
}

.construction-evidence {
  align-content: center;
  background: var(--white);
  border: 1px solid var(--line);
  display: grid;
  gap: 20px;
  grid-column: 2;
  grid-template-columns: minmax(0, 1fr) minmax(160px, 0.55fr);
  margin: 0;
  padding: clamp(25px, 4vw, 42px);
}

.construction-evidence p {
  color: var(--ink);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.65;
  margin: 0;
}

.construction-evidence figcaption {
  border-left: 3px solid var(--industrial);
  padding-left: 18px;
}

.construction-workflow-section {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.construction-workflow {
  counter-reset: construction-workflow;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  list-style: none;
  margin: 62px 0 38px;
  padding: 0;
}

.construction-workflow li {
  border-top: 3px solid var(--line);
  counter-increment: construction-workflow;
  line-height: 1.65;
  min-width: 0;
  padding: 30px clamp(22px, 4vw, 46px) 0 0;
  position: relative;
}

.construction-workflow li::before {
  background: var(--blueprint);
  border: 5px solid var(--paper);
  border-radius: 50%;
  color: var(--white);
  content: counter(construction-workflow);
  display: grid;
  font-size: 0.72rem;
  font-weight: 850;
  height: 28px;
  left: 0;
  place-items: center;
  position: absolute;
  top: -16px;
  width: 28px;
}

.construction-comparison {
  background: var(--paper-deep);
  max-width: none;
  padding-left: max(var(--page-pad), calc((100% - 1280px) / 2));
  padding-right: max(var(--page-pad), calc((100% - 1280px) / 2));
}

.construction-table-wrap {
  border: 1px solid var(--line);
  margin-top: 50px;
  max-width: 100%;
  overflow-x: auto;
}

.construction-table-wrap table {
  border-collapse: collapse;
  min-width: 720px;
  width: 100%;
}

.construction-table-wrap caption {
  background: var(--white);
  color: var(--muted);
  padding: 14px 18px;
  text-align: left;
}

.construction-table-wrap th,
.construction-table-wrap td {
  border-top: 1px solid var(--line);
  padding: 16px 18px;
  text-align: center;
}

.construction-table-wrap th:first-child {
  text-align: left;
}

.construction-table-wrap thead th {
  background: #e4e3de;
}

.construction-table-wrap th:nth-child(4),
.construction-table-wrap td:nth-child(4) {
  background: #e4f1ef;
  color: var(--teal-dark);
  font-weight: 800;
}

[data-construction-pricing] {
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 18px 52px rgba(20, 39, 43, 0.08);
  margin-top: 42px;
  max-width: 780px;
  padding: clamp(24px, 5vw, 46px);
}

.construction-pricing__terms {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.construction-pricing__terms button {
  align-items: center;
  background: var(--white);
  border-color: var(--line);
  color: var(--ink);
  flex: 1 1 160px;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.construction-pricing__terms button[aria-pressed="true"] {
  background: #e5f2f0;
  border-color: var(--teal);
  color: var(--teal-dark);
}

.construction-pricing__terms strong {
  background: var(--badge-background);
  border-radius: 999px;
  color: var(--badge-foreground);
  font-size: 0.67rem;
  padding: 4px 7px;
}

[data-construction-price] {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 850;
  letter-spacing: -0.04em;
  margin: 34px 0 26px;
  overflow-wrap: anywhere;
}

[data-construction-pricing] .button {
  overflow-wrap: anywhere;
  white-space: normal;
}

.construction-faq details {
  border-bottom: 1px solid var(--line);
  max-width: 920px;
}

.construction-faq summary {
  cursor: pointer;
  font-weight: 750;
  line-height: 1.5;
  padding: 22px 38px 22px 0;
}

.construction-faq details p {
  color: var(--muted);
  line-height: 1.75;
}

.env-commerce__modal[hidden] {
  display: none;
}

.env-commerce__modal {
  display: grid;
  inset: 0;
  overflow-y: auto;
  padding: 24px;
  place-items: center;
  position: fixed;
  z-index: 100;
}

.env-commerce__modal-backdrop {
  background: rgba(8, 23, 27, 0.76);
  inset: 0;
  position: fixed;
}

.env-commerce__dialog {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 28px 84px rgba(0, 0, 0, 0.3);
  max-height: calc(100dvh - 48px);
  max-width: 660px;
  overflow-y: auto;
  padding: clamp(24px, 5vw, 44px);
  position: relative;
  width: 100%;
  z-index: 1;
}

.env-commerce__close {
  float: right;
  min-height: 38px;
  padding: 7px 12px;
}

.env-commerce__dialog h2 {
  font-size: clamp(1.55rem, 3vw, 2rem);
  line-height: 1.2;
  margin: 6px 86px 24px 0;
}

.env-commerce__dialog form,
.env-commerce__dialog label {
  display: grid;
  gap: 8px;
}

.env-commerce__dialog form {
  gap: 18px;
}

.env-commerce__dialog input,
.env-commerce__dialog select,
.env-commerce__dialog textarea {
  background: var(--white);
  border: 1px solid #9ca9a5;
  border-radius: 6px;
  color: var(--ink);
  font: inherit;
  min-height: 46px;
  padding: 10px 12px;
  width: 100%;
}

.env-commerce__dialog textarea {
  min-height: 100px;
  resize: vertical;
}

.env-commerce__dialog label:has(input[type="checkbox"]) {
  align-items: start;
  grid-template-columns: auto 1fr;
}

.env-commerce__dialog input[type="checkbox"] {
  min-height: 20px;
  width: 20px;
}

:focus-visible {
  box-shadow: 0 0 0 2px #fff, 0 0 0 5px #004f4f;
  outline: 3px solid #004f4f;
  outline-offset: 4px;
}

@media (max-width: 1199px) {
  .construction-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .construction-hero__copy {
    max-width: 720px;
  }
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: minmax(130px, 1fr) auto;
  }

  .construction-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .construction-hero__copy {
    max-width: 720px;
  }

  .site-nav {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .construction-capabilities {
    grid-template-columns: minmax(240px, 0.7fr) minmax(0, 1.3fr);
  }
}

@media (max-width: 720px) {
  html {
    scroll-padding-top: 24px;
    scrollbar-width: none;
  }

  html::-webkit-scrollbar {
    display: none;
  }

  .site-header {
    gap: 10px 12px;
    padding: 14px 16px;
    position: static;
  }

  .site-header > .button {
    font-size: 0.76rem;
    min-height: 38px;
    padding: 7px 10px;
  }

  .site-nav {
    border-top: 1px solid var(--line);
    gap: 0 12px;
    justify-content: flex-start;
    padding-top: 6px;
  }

  .site-nav a {
    font-size: 0.75rem;
    padding: 6px 0;
    white-space: nowrap;
  }

  .construction-hero {
    gap: 34px;
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 54px 20px 68px;
  }

  .construction-hero h1 {
    font-size: clamp(2.2rem, 10vw, 2.6rem);
  }

  .construction-title-line {
    display: block;
    white-space: nowrap;
  }

  .construction-section {
    padding: 72px 20px;
  }

  .construction-capabilities {
    display: grid;
    grid-template-columns: 1fr;
  }

  .construction-capabilities > h2,
  .construction-capabilities > .construction-capability-list,
  .construction-capabilities > p,
  .construction-evidence {
    grid-column: 1;
  }

  .construction-evidence {
    grid-template-columns: 1fr;
    padding: 26px 20px;
  }

  .construction-evidence figcaption {
    border-left: 0;
    border-top: 3px solid var(--industrial);
    padding: 16px 0 0;
  }

  .construction-workflow {
    grid-template-columns: 1fr;
    margin-top: 46px;
  }

  .construction-workflow li {
    border-left: 3px solid var(--line);
    border-top: 0;
    padding: 0 0 38px 32px;
  }

  .construction-workflow li::before {
    left: -16px;
    top: 0;
  }

  .construction-comparison {
    padding-left: 20px;
    padding-right: 20px;
  }

  [data-construction-pricing] {
    padding: 24px 18px;
  }

  .construction-pricing__terms button,
  [data-construction-pricing] .button {
    flex-basis: 100%;
    width: 100%;
  }

  .env-commerce__modal {
    padding: 10px;
  }

  .env-commerce__dialog {
    max-height: calc(100dvh - 20px);
    padding: 26px 18px 22px;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}