:root {
  --ink: #111827;
  --muted: #5f6b7a;
  --line: #d9e1ea;
  --paper: #ffffff;
  --surface: #f4f7fa;
  --steel: #142536;
  --steel-2: #20394f;
  --blue: #1268b3;
  --teal: #0f9a9a;
  --red: #c82127;
  --amber: #d99b2b;
  --shadow: 0 18px 48px rgba(15, 31, 46, 0.14);
  --radius: 8px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  background: var(--paper);
}

body.nav-open {
  overflow: hidden;
}

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

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

h1,
h2,
h3,
p,
li,
th,
td,
a,
span {
  overflow-wrap: break-word;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  width: 100%;
  min-height: 76px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 14px clamp(20px, 4vw, 56px);
  color: #ffffff;
  background: rgba(11, 23, 34, 0.16);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  transition: background 180ms ease, box-shadow 180ms ease, color 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 32px rgba(14, 33, 52, 0.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: 210px;
  min-width: 170px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 6px;
}

.brand img {
  width: 100%;
  height: auto;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  min-width: 0;
}

.primary-nav > a,
.nav-group > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 13px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.nav-group {
  position: relative;
}

.nav-group > a::after {
  content: "";
  width: 6px;
  height: 6px;
  margin-left: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}

.primary-nav > a:hover,
.nav-group:hover > a,
.nav-menu a:hover {
  color: var(--red);
}

.nav-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  width: 238px;
  padding: 10px;
  color: var(--ink);
  background: #ffffff;
  border: 1px solid rgba(20, 37, 54, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: 160ms ease;
}

.product-menu {
  width: 286px;
}

.nav-menu a {
  display: block;
  padding: 11px 12px;
  font-size: 14px;
  color: var(--steel);
  border-radius: 6px;
}

.nav-group:hover .nav-menu,
.nav-group:focus-within .nav-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  color: #ffffff;
  font-size: 14px;
  font-weight: 800;
  background: var(--red);
  border-radius: 999px;
  box-shadow: 0 12px 24px rgba(200, 33, 39, 0.28);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  color: currentColor;
  background: transparent;
  border: 0;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 160ms ease, opacity 160ms ease;
}

.site-header.is-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header.is-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.site-header.is-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #ffffff;
  background:
    linear-gradient(90deg, rgba(10, 22, 33, 0.95) 0%, rgba(14, 34, 48, 0.84) 40%, rgba(15, 51, 65, 0.46) 70%, rgba(255, 255, 255, 0.12) 100%),
    url("../images/product-mineral.jpg") right 12% center / min(58vw, 720px) auto no-repeat,
    radial-gradient(circle at 74% 42%, rgba(15, 154, 154, 0.42), transparent 28%),
    linear-gradient(135deg, #0b1722 0%, #142536 58%, #1d4d6b 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  background: linear-gradient(0deg, rgba(255, 255, 255, 0.98), transparent);
  pointer-events: none;
}

.hero-visual {
  position: absolute;
  right: clamp(18px, 5vw, 90px);
  bottom: clamp(70px, 11vh, 150px);
  z-index: 1;
  width: min(28vw, 340px);
  aspect-ratio: 1;
}

.hero-product {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 30px 46px rgba(0, 0, 0, 0.22));
  opacity: 0;
  transform: translateY(24px) scale(0.92);
  transition: opacity 650ms ease, transform 650ms ease;
}

.hero-product.is-active {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.hero-product-link {
  position: absolute;
  inset: -14px;
  z-index: 4;
  border-radius: var(--radius);
}

.hero-product-link::after {
  content: "View story";
  position: absolute;
  right: 14px;
  bottom: -46px;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 15px;
  color: #ffffff;
  font-size: 13px;
  font-weight: 900;
  background: var(--red);
  border-radius: 999px;
  box-shadow: 0 14px 28px rgba(200, 33, 39, 0.28);
}

.hero-product-link:hover::after,
.hero-product-link:focus-visible::after {
  background: #a91b20;
}

.hero-product-link:focus-visible {
  outline: 3px solid #ffcc66;
  outline-offset: 4px;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 100px;
  padding-bottom: 72px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ffcc66;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(46px, 6vw, 82px);
  line-height: 0.98;
  font-weight: 900;
}

.hero-copy {
  max-width: 650px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(17px, 1.7vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  font-weight: 900;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

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

.btn-primary {
  color: #ffffff;
  background: var(--red);
  box-shadow: 0 16px 28px rgba(200, 33, 39, 0.28);
}

.btn-secondary {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.1);
}

.btn-ghost {
  color: var(--steel);
  background: #ffffff;
  border-color: var(--line);
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  margin-top: 18px;
  color: var(--red);
  font-weight: 900;
}

.text-link::after {
  content: "";
  width: 8px;
  height: 8px;
  margin-left: 9px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: rotate(45deg);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(130px, 1fr));
  gap: 1px;
  max-width: 650px;
  margin: 46px 0 0;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-stats div {
  padding: 20px;
  background: rgba(9, 24, 36, 0.44);
}

.hero-stats dt {
  font-size: 25px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 13px;
}

.trust-strip {
  position: relative;
  z-index: 3;
  margin-top: -42px;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.trust-grid div {
  padding: 28px;
  background: #ffffff;
}

.trust-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--steel);
  font-size: 17px;
}

.trust-grid span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 96px 0;
}

.partners-section {
  background: var(--surface);
}

.partners-section .section-head {
  max-width: 820px;
}

.partners-board {
  width: min(100%, 1040px);
  margin: 0 auto;
  padding: clamp(14px, 2.2vw, 26px);
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 16px 36px rgba(15, 31, 46, 0.08);
}

.partners-board img {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.page-main {
  padding-top: 76px;
}

.page-hero {
  color: #ffffff;
  padding: 96px 0 74px;
  background:
    linear-gradient(110deg, rgba(9, 20, 30, 0.95), rgba(18, 58, 83, 0.72)),
    url("../images/project-3.png") center / cover no-repeat;
}

.page-hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(38px, 5vw, 66px);
  line-height: 1.04;
  font-weight: 900;
}

.page-hero p:not(.eyebrow) {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(17px, 1.7vw, 21px);
}

.page-hero .eyebrow {
  color: #ffcc66;
}

.workshop-page-hero {
  background:
    linear-gradient(110deg, rgba(9, 20, 30, 0.95), rgba(18, 58, 83, 0.72)),
    url("../images/news-mongolian-clients-visit-workshop.jpg") center / cover no-repeat;
}

.factory-page-hero {
  background:
    linear-gradient(110deg, rgba(9, 20, 30, 0.95), rgba(18, 58, 83, 0.72)),
    url("../images/%E5%8E%82%E5%8C%BA%E7%85%A7%E7%89%87/25.jpg") center / cover no-repeat;
}

.breadcrumb {
  min-height: 58px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  color: var(--muted);
  font-size: 14px;
  border-bottom: 1px solid var(--line);
}

.breadcrumb a {
  color: var(--blue);
  font-weight: 800;
}

.content-section {
  padding: 78px 0;
}

.content-section.surface,
.surface {
  background: var(--surface);
}

.two-column,
.list-layout,
.detail-layout,
.article-layout,
.contact-page-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 44px;
  align-items: start;
}

.two-column h2,
.detail-content h2,
.article-body h2,
.contact-page-grid h2 {
  margin: 0 0 18px;
  color: var(--steel);
  font-size: clamp(30px, 3.5vw, 48px);
  line-height: 1.08;
  font-weight: 900;
}

.two-column p,
.detail-content p,
.article-body p {
  color: var(--muted);
  font-size: 17px;
}

.feature-panel {
  padding: 28px;
  background: var(--surface);
  border-radius: var(--radius);
  border-left: 4px solid var(--red);
}

.feature-panel strong {
  display: block;
  margin-bottom: 12px;
  color: var(--steel);
  font-size: 22px;
}

.list-layout {
  grid-template-columns: 270px 1fr;
}

.sidebar {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 8px;
  padding: 20px;
  background: var(--surface);
  border-radius: var(--radius);
}

.sidebar strong {
  color: var(--steel);
  font-size: 18px;
  margin-bottom: 6px;
}

.sidebar a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  color: var(--steel);
  font-weight: 800;
  background: #ffffff;
  border-radius: 6px;
}

.sidebar a:hover {
  color: #ffffff;
  background: var(--red);
}

.product-archive-section + .product-archive-section {
  margin-top: 64px;
}

.archive-grid,
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.archive-card {
  overflow: hidden;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(15, 31, 46, 0.06);
}

.archive-card a {
  display: grid;
  height: 100%;
}

.archive-card img {
  width: 100%;
  aspect-ratio: 1.35;
  object-fit: contain;
  padding: 16px;
  background: #ffffff;
}

.archive-card div {
  padding: 20px;
}

.archive-card span {
  display: block;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.archive-card h2 {
  margin: 9px 0 10px;
  color: var(--steel);
  font-size: 20px;
  line-height: 1.24;
}

.archive-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.detail-layout {
  grid-template-columns: 390px 1fr;
}

.detail-aside {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 18px;
}

.detail-aside img {
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  padding: 18px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.lead {
  font-size: 19px;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.spec-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  background: #ffffff;
}

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

.spec-table th {
  width: 34%;
  color: var(--steel);
  background: var(--surface);
}

.spec-table td {
  color: var(--muted);
}

.detail-content h3 {
  margin: 28px 0 12px;
  color: var(--steel);
  font-size: 24px;
}

.detail-cta {
  margin-top: 32px;
  padding: 26px;
  color: #ffffff;
  background: var(--steel);
  border-radius: var(--radius);
}

.detail-cta h3 {
  margin-top: 0;
  color: #ffffff;
}

.detail-cta p {
  color: rgba(255, 255, 255, 0.76);
}

.faq-list {
  margin-top: 34px;
}

.faq-list details {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  color: var(--steel);
  font-weight: 900;
  cursor: pointer;
}

.faq-list p {
  margin: 10px 0 0;
}

.solution-card {
  min-height: 270px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 28px;
  background: #ffffff;
  border-radius: var(--radius);
  border-top: 4px solid var(--teal);
  box-shadow: 0 10px 28px rgba(15, 31, 46, 0.06);
}

.solution-card h2 {
  margin: 0 0 12px;
  color: var(--steel);
}

.solution-card p {
  color: var(--muted);
}

.solution-card a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--red);
  font-weight: 900;
}

.workshop-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.workshop-card {
  padding: 0;
  overflow: hidden;
  color: var(--steel);
  text-align: left;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(15, 31, 46, 0.06);
  transition: transform 150ms ease, box-shadow 150ms ease;
}

.workshop-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(15, 31, 46, 0.11);
}

.workshop-card img {
  width: 100%;
  aspect-ratio: 1.42;
  object-fit: cover;
  background: var(--surface);
}

.workshop-card span {
  display: block;
  padding: 16px 18px;
  font-size: 15px;
  font-weight: 900;
}

.article-layout {
  grid-template-columns: minmax(0, 1fr) 300px;
}

.article-body {
  max-width: 860px;
}

.article-cover {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 28px;
  background: var(--surface);
}

.article-meta {
  margin: 0 0 10px;
  color: var(--red) !important;
  font-size: 13px !important;
  font-weight: 900;
  text-transform: uppercase;
}

.article-body h3 {
  margin: 34px 0 12px;
  color: var(--steel);
  font-size: clamp(24px, 2.5vw, 32px);
  line-height: 1.18;
}

.article-figure {
  margin: 30px 0;
}

.article-figure img {
  width: 100%;
  max-height: 540px;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--surface);
}

.article-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.article-side {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 12px;
  padding: 22px;
  background: var(--surface);
  border-radius: var(--radius);
}

.article-side h3 {
  margin: 0;
  color: var(--steel);
}

.article-side a:not(.btn) {
  display: block;
  padding: 12px 0;
  color: var(--steel);
  font-weight: 800;
  border-bottom: 1px solid var(--line);
}

.contact-page-grid {
  grid-template-columns: 0.9fr 1fr;
}

.contact-page-grid .contact-copy h2,
.contact-page-grid .contact-copy p,
.contact-page-grid .contact-copy .eyebrow {
  color: var(--steel);
}

.contact-page-grid .contact-copy .eyebrow {
  color: var(--red);
}

.contact-page-grid .contact-lines a,
.contact-page-grid .contact-lines span {
  color: var(--steel);
  background: var(--surface);
  border-color: var(--line);
}

.section-head {
  max-width: 760px;
  margin-bottom: 38px;
}

.section-head h2,
.capability-copy h2,
.quality-copy h2,
.contact-copy h2 {
  margin: 0;
  color: var(--steel);
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.06;
  font-weight: 900;
}

.section-head p:not(.eyebrow),
.capability-copy p,
.quality-copy p,
.contact-copy p {
  color: var(--muted);
  font-size: 17px;
}

.products-section {
  background: #ffffff;
}

.product-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  align-items: stretch;
}

.segment-tabs {
  display: grid;
  gap: 10px;
  align-self: start;
  position: sticky;
  top: 100px;
}

.segment-tab {
  min-height: 58px;
  padding: 0 20px;
  color: var(--steel);
  font-weight: 900;
  text-align: left;
  background: var(--surface);
  border: 1px solid transparent;
  border-radius: var(--radius);
}

.segment-tab.is-active {
  color: #ffffff;
  background: var(--steel);
  border-color: var(--steel);
}

.segment-panels {
  min-height: 430px;
}

.segment-panel {
  display: none;
  min-height: 430px;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 34px;
  align-items: center;
  padding: 36px;
  background: var(--surface);
  border-radius: var(--radius);
}

.segment-panel.is-active {
  display: grid;
}

.segment-panel h3 {
  margin: 0 0 16px;
  color: var(--steel);
  font-size: clamp(27px, 3vw, 42px);
  line-height: 1.12;
}

.segment-panel p {
  color: var(--muted);
}

.panel-kicker {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.check-list {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: var(--steel);
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--red);
  border-radius: 50%;
  box-shadow: inset 0 0 0 4px #ffffff;
}

.segment-panel img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  padding: 18px;
  background: #ffffff;
  border-radius: var(--radius);
}

.product-catalog {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.product-catalog span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 13px;
  color: var(--steel);
  font-size: 13px;
  font-weight: 800;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.capabilities {
  background: linear-gradient(180deg, #f7fafc 0%, #ffffff 100%);
}

.capability-grid {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 58px;
  align-items: center;
}

.capability-media {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: end center;
  background:
    radial-gradient(circle at 18% 18%, rgba(18, 104, 179, 0.16), transparent 28%),
    linear-gradient(145deg, #dbe9f2, #f9fbfc);
  border-radius: var(--radius);
  overflow: hidden;
}

.capability-media img {
  width: min(82%, 390px);
  margin-bottom: 28px;
}

.media-note {
  position: absolute;
  left: 24px;
  bottom: 24px;
  width: min(72%, 330px);
  padding: 18px;
  color: #ffffff;
  background: rgba(20, 37, 54, 0.92);
  border-radius: var(--radius);
}

.media-note strong,
.media-note span {
  display: block;
}

.media-note span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.metric-grid div {
  min-height: 142px;
  padding: 22px;
  background: var(--surface);
  border-left: 4px solid var(--red);
  border-radius: var(--radius);
}

.metric-grid span {
  display: block;
  color: var(--steel);
  font-size: 34px;
  line-height: 1;
  font-weight: 900;
}

.metric-grid p {
  margin: 10px 0 0;
  font-size: 14px;
}

.milestones {
  padding: 0 0 96px;
  background: #ffffff;
}

.milestone-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.milestone-grid div {
  padding: 28px;
  background: #ffffff;
}

.milestone-grid span {
  display: block;
  color: var(--red);
  font-size: 34px;
  font-weight: 900;
}

.milestone-grid h3 {
  margin: 10px 0 8px;
  color: var(--steel);
}

.milestone-grid p {
  margin: 0;
  color: var(--muted);
}

.scenario-section {
  --scenario-panorama: url("../../docs/%E5%85%AC%E5%8F%B8%E5%85%A8%E6%99%AF%E5%9B%BE.jpg");
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 96px 0;
  color: #ffffff;
  background: #142536;
}

.scenario-section::before,
.scenario-section::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.scenario-section::before {
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(180deg, rgba(11, 23, 34, 0.72) 0%, rgba(11, 23, 34, 0.5) 44%, rgba(11, 23, 34, 0.82) 100%),
    var(--scenario-panorama) center 48% / cover no-repeat;
}

.scenario-section::after {
  left: -5%;
  right: -5%;
  bottom: -82px;
  z-index: -1;
  height: 230px;
  opacity: 0.52;
  filter: blur(22px);
  transform: scale(1.05);
  background:
    linear-gradient(180deg, rgba(20, 37, 54, 0), rgba(20, 37, 54, 0.74)),
    var(--scenario-panorama) center bottom / cover no-repeat;
}

.scenario-section .container {
  position: relative;
  z-index: 1;
}

.scenario-section .section-head h2 {
  color: #ffffff;
}

.scenario-section .eyebrow {
  color: #ffcc66;
}

.scenario-map {
  position: relative;
  overflow: hidden;
  min-height: 480px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(14, 29, 43, 0.5);
  box-shadow: 0 28px 70px rgba(4, 12, 20, 0.34);
}

.scenario-map img {
  width: 100%;
  height: 100%;
  min-height: 480px;
  object-fit: cover;
  opacity: 0.74;
}

.scenario-map::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(9, 17, 26, 0.18), rgba(9, 17, 26, 0.48));
}

.scenario-pin {
  position: absolute;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  color: #ffffff;
  font-size: 14px;
  font-weight: 900;
  background: rgba(200, 33, 39, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.2);
}

.scenario-pin::before {
  content: "";
  width: 9px;
  height: 9px;
  margin-right: 8px;
  background: #ffffff;
  border-radius: 50%;
}

.pin-a { left: 10%; top: 20%; }
.pin-b { left: 52%; top: 22%; }
.pin-c { left: 18%; top: 58%; }
.pin-d { right: 8%; top: 52%; }
.pin-e { left: 42%; bottom: 14%; }

.projects {
  background: #ffffff;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.project-card {
  overflow: hidden;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(15, 31, 46, 0.06);
}

.project-card img {
  width: 100%;
  aspect-ratio: 1.6;
  object-fit: cover;
  background: var(--surface);
}

.project-card div {
  padding: 22px;
}

.project-card span,
.update-card time {
  display: block;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.project-card h3,
.update-card h3 {
  margin: 9px 0 10px;
  color: var(--steel);
  line-height: 1.22;
}

.project-card p,
.update-card p {
  margin: 0;
  color: var(--muted);
}

.updates {
  background: var(--surface);
}

.update-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.update-card {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 26px;
  background: #ffffff;
  border-radius: var(--radius);
  border-top: 4px solid var(--teal);
}

.quality {
  background: linear-gradient(180deg, #ffffff 0%, #f4f7fa 100%);
}

.quality-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 52px;
  align-items: start;
}

.protection-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.protection-grid span {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  color: var(--steel);
  background: var(--surface);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
}

.certificate-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.certificate {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100%;
  padding: 0;
  overflow: hidden;
  color: var(--steel);
  text-align: left;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(15, 31, 46, 0.08);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.certificate:hover {
  transform: translateY(-4px);
  border-color: rgba(18, 104, 179, 0.38);
  box-shadow: 0 18px 38px rgba(15, 31, 46, 0.14);
}

.certificate:focus-visible {
  outline: 3px solid rgba(18, 104, 179, 0.28);
  outline-offset: 3px;
}

.certificate-image {
  display: block;
  padding: 14px;
  background: linear-gradient(180deg, #f9fbfd 0%, #edf3f8 100%);
  border-bottom: 1px solid var(--line);
}

.certificate img {
  width: 100%;
  aspect-ratio: 707 / 1000;
  object-fit: contain;
  object-position: top center;
  background: #ffffff;
  border: 1px solid rgba(20, 37, 54, 0.1);
  border-radius: 5px;
  box-shadow: 0 10px 22px rgba(15, 31, 46, 0.12);
}

.certificate-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 16px 17px;
}

.certificate-meta strong {
  color: var(--steel);
  font-size: 15px;
  line-height: 1.25;
}

.certificate-meta small {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.cert-list {
  grid-column: 1 / -1;
  margin-top: 24px;
  padding: 22px;
  color: #ffffff;
  background: var(--steel);
  border-radius: var(--radius);
}

.cert-list strong {
  display: block;
  margin-bottom: 8px;
  color: #ffffff;
}

.cert-list p {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
}

.contact {
  color: #ffffff;
  background:
    linear-gradient(110deg, rgba(13, 29, 43, 0.96), rgba(18, 104, 179, 0.74)),
    url("../images/project-1.png") center / cover no-repeat;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 48px;
  align-items: start;
}

.contact-copy h2,
.contact-copy p,
.contact-copy .eyebrow {
  color: #ffffff;
}

.contact-copy .eyebrow {
  color: #ffcc66;
}

.contact-lines {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.contact-lines a,
.contact-lines span {
  display: block;
  padding: 16px 18px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
}

.inquiry-form {
  display: grid;
  gap: 16px;
  padding: 28px;
  color: var(--ink);
  background: #ffffff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.inquiry-form label {
  display: grid;
  gap: 8px;
  color: var(--steel);
  font-size: 14px;
  font-weight: 900;
}

.inquiry-form input,
.inquiry-form textarea {
  width: 100%;
  padding: 13px 14px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid transparent;
  border-radius: 6px;
  resize: vertical;
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
  outline: 2px solid rgba(18, 104, 179, 0.25);
  border-color: var(--blue);
}

.inquiry-form .btn {
  width: 100%;
  border: 0;
}

.site-footer {
  color: rgba(255, 255, 255, 0.76);
  background: #0b1722;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding: 54px 0;
}

.footer-grid img {
  width: 220px;
  padding: 9px;
  background: #ffffff;
  border-radius: 6px;
}

.footer-grid p {
  max-width: 420px;
}

.footer-grid strong {
  display: block;
  margin-bottom: 14px;
  color: #ffffff;
}

.footer-grid a {
  display: block;
  margin: 8px 0;
}

.footer-grid a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding: 18px 24px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.floating-actions {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 60;
  display: grid;
  gap: 8px;
}

.floating-actions a,
.floating-actions button {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: #ffffff;
  font-size: 12px;
  font-weight: 900;
  background: var(--steel);
  border: 0;
  border-radius: 50%;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
}

.floating-actions a:nth-child(3) {
  background: var(--teal);
}

.image-dialog {
  width: min(760px, calc(100% - 32px));
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.image-dialog::backdrop {
  background: rgba(6, 13, 20, 0.72);
}

.image-dialog img {
  width: 100%;
  max-height: 84vh;
  object-fit: contain;
  background: #ffffff;
}

.dialog-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  min-height: 38px;
  padding: 0 14px;
  color: #ffffff;
  background: var(--red);
  border: 0;
  border-radius: 999px;
  font-weight: 900;
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

@media (max-width: 1120px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .nav-toggle {
    display: inline-flex;
    justify-self: end;
  }

  .header-action {
    display: none;
  }

  .primary-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    bottom: 0;
    display: block;
    padding: 18px 24px 32px;
    overflow: auto;
    color: var(--ink);
    background: #ffffff;
    transform: translateX(100%);
    transition: transform 180ms ease;
  }

  .site-header.is-open .primary-nav {
    transform: translateX(0);
  }

  .primary-nav > a,
  .nav-group > a {
    width: 100%;
    min-height: 48px;
    padding: 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-menu {
    position: static;
    width: 100%;
    padding: 0 0 10px;
    box-shadow: none;
    border: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-menu a {
    padding-left: 18px;
  }

  .hero {
    background:
      linear-gradient(90deg, rgba(10, 22, 33, 0.95), rgba(13, 29, 43, 0.76)),
      url("../images/product-mineral.jpg") right 5% bottom 10% / min(72vw, 560px) auto no-repeat,
      linear-gradient(135deg, #0b1722, #20394f);
  }

  .hero-visual {
    display: none;
  }

  .product-layout,
  .capability-grid,
  .quality-grid,
  .contact-grid,
  .two-column,
  .list-layout,
  .detail-layout,
  .article-layout,
  .contact-page-grid {
    grid-template-columns: 1fr;
  }

  .sidebar,
  .detail-aside,
  .article-side {
    position: static;
  }

  .archive-grid,
  .workshop-grid,
  .solution-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .segment-tabs {
    position: static;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .container {
    width: min(100% - 32px, var(--container));
  }

  .site-header {
    min-height: 70px;
    padding: 12px 16px;
  }

  .brand {
    width: 190px;
  }

  .primary-nav {
    top: 70px;
  }

  .hero {
    min-height: 720px;
    background:
      linear-gradient(180deg, rgba(10, 22, 33, 0.96) 0%, rgba(13, 29, 43, 0.9) 56%, rgba(13, 29, 43, 0.68) 100%),
      url("../images/product-mineral.jpg") center bottom 42px / 360px auto no-repeat,
      linear-gradient(135deg, #0b1722, #20394f);
  }

  .hero-content {
    padding-top: 120px;
  }

  .hero-stats,
  .trust-grid,
  .milestone-grid,
  .project-grid,
  .update-list,
  .footer-grid,
  .archive-grid,
  .workshop-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .page-main {
    padding-top: 70px;
  }

  .page-hero {
    padding: 72px 0 52px;
  }

  .content-section {
    padding: 58px 0;
  }

  .two-column,
  .list-layout,
  .detail-layout,
  .article-layout,
  .contact-page-grid {
    gap: 28px;
  }

  .archive-card img {
    aspect-ratio: 1.45;
  }

  .section,
  .scenario-section {
    padding: 72px 0;
  }

  .milestones {
    padding-bottom: 72px;
  }

  .segment-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .segment-panel {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 24px;
  }

  .segment-panel img {
    max-height: 320px;
  }

  .metric-grid,
  .certificate-stack {
    grid-template-columns: 1fr;
  }

  .scenario-map,
  .scenario-map img {
    min-height: 520px;
  }

  .scenario-pin {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    margin: 10px;
  }

  .scenario-map {
    display: grid;
  }

  .scenario-map img {
    grid-area: 1 / 1;
  }

  .scenario-pin {
    grid-area: 1 / 1;
    align-self: end;
    justify-self: start;
  }

  .pin-b { margin-bottom: 58px; }
  .pin-c { margin-bottom: 106px; }
  .pin-d { margin-bottom: 154px; }
  .pin-e { margin-bottom: 202px; }

  .floating-actions {
    right: 12px;
    bottom: 12px;
  }
}

@media (max-width: 520px) {
  .brand {
    width: 168px;
  }

  .hero h1 {
    font-size: 43px;
  }

  .hero-actions {
    display: grid;
  }

  .btn {
    width: 100%;
  }

  .page-hero h1 {
    font-size: 36px;
    overflow-wrap: anywhere;
  }

  .page-hero p:not(.eyebrow),
  .two-column p,
  .detail-content p,
  .article-body p {
    font-size: 16px;
  }

  .segment-tabs {
    grid-template-columns: 1fr;
  }

  .trust-grid div,
  .milestone-grid div,
  .inquiry-form,
  .feature-panel,
  .solution-card,
  .detail-cta,
  .article-side,
  .archive-card div {
    padding: 22px;
  }

  .spec-table {
    min-width: 480px;
  }

  .floating-actions a,
  .floating-actions button {
    width: 44px;
    height: 44px;
  }
}