:root {
  --ink: #171511;
  --ink-soft: #37332b;
  --muted: #756f62;
  --line: #ded7ca;
  --paper: #fbfaf7;
  --paper-2: #f3efe8;
  --charcoal: #24211c;
  --gold: #b8873d;
  --gold-soft: #e6d3a6;
  --white: #ffffff;
  --shadow: 0 24px 80px rgba(31, 25, 15, 0.14);
  --radius: 8px;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(251, 250, 247, 0.98)),
    radial-gradient(circle at 20% 0%, rgba(184, 135, 61, 0.12), transparent 34%);
  color: var(--ink);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(251, 250, 247, 0.88);
  border-bottom: 1px solid rgba(222, 215, 202, 0.78);
  backdrop-filter: blur(18px);
}

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

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--gold-soft);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
  letter-spacing: 0;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--ink-soft);
  font-size: 14px;
}

.site-nav a {
  padding: 8px 0;
}

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

.nav-cta {
  padding: 9px 16px !important;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--ink) !important;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.section-pad {
  padding: clamp(72px, 9vw, 126px) clamp(20px, 5vw, 72px);
}

.section-label {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: clamp(44px, 6.5vw, 82px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.35;
}

p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.82;
}

.hero {
  display: grid;
  min-height: calc(100vh - 230px);
  min-height: calc(100svh - 230px);
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, 0.72fr);
  align-items: center;
  gap: clamp(36px, 6vw, 86px);
  border-bottom: 1px solid var(--line);
}

.hero.section-pad {
  padding-top: clamp(44px, 6vw, 76px);
  padding-bottom: clamp(44px, 6vw, 76px);
}

.hero-lede {
  max-width: 700px;
  color: var(--ink-soft);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
}

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

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.56);
  color: var(--ink);
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 860px;
  margin: 42px 0 0;
}

.hero-proof div {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.hero-proof dt {
  font-size: 19px;
  font-weight: 800;
}

.hero-proof dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.hero-panel {
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid rgba(184, 135, 61, 0.34);
  border-radius: 18px;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.96), rgba(248, 244, 235, 0.82)),
    repeating-linear-gradient(90deg, transparent 0 24px, rgba(184, 135, 61, 0.04) 24px 25px);
  box-shadow: var(--shadow);
}

.panel-topline,
.bid-card,
.data-grid {
  border-radius: var(--radius);
}

.panel-topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.panel-topline strong {
  color: var(--gold);
}

.bid-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 26px 0;
  padding: 24px;
  background: var(--charcoal);
  color: var(--white);
}

.bid-card .muted,
.data-grid span {
  display: block;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.bid-card strong {
  font-size: 20px;
}

.bid-card .price {
  color: var(--gold-soft);
  font-size: 28px;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.data-grid div {
  padding: 18px;
  border: 1px solid rgba(222, 215, 202, 0.88);
  background: rgba(255, 255, 255, 0.66);
}

.data-grid span {
  color: var(--muted);
}

.data-grid strong {
  font-size: 17px;
}

.section-heading {
  max-width: 900px;
  margin-bottom: 42px;
}

.section-heading.narrow {
  max-width: 780px;
}

.role-section,
.platform-section,
.operating-section {
  background: var(--white);
}

.role-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 18px;
}

.role-card,
.ops-grid article,
.capability-board article,
.flow-track article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.role-card {
  position: relative;
  min-height: 310px;
  padding: 30px;
  overflow: hidden;
}

.role-card.primary-card {
  background: var(--charcoal);
  color: var(--white);
}

.role-card.primary-card p {
  color: rgba(255, 255, 255, 0.74);
}

.role-card img {
  width: 180px;
  margin-top: 36px;
}

.card-index {
  display: inline-block;
  margin-bottom: 56px;
  color: var(--gold);
  font-weight: 800;
}

.flow-section {
  background: var(--paper-2);
}

.flow-track {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.flow-track article {
  min-height: 260px;
  padding: 22px;
  background: var(--white);
}

.flow-track span {
  display: grid;
  width: 34px;
  height: 34px;
  margin-bottom: 40px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--gold-soft);
  font-size: 14px;
  font-weight: 800;
}

.flow-track p {
  font-size: 14px;
  line-height: 1.7;
}

.control-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.control-band div {
  padding: 28px;
  background: var(--white);
}

.platform-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.2em;
  color: var(--gold);
  content: "✓";
  font-weight: 800;
}

.capability-board {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.capability-board article {
  min-height: 220px;
  padding: 28px;
  background: linear-gradient(180deg, var(--paper), var(--white));
}

.capability-board span {
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.capability-board strong {
  display: block;
  margin: 38px 0 12px;
  font-size: 24px;
}

.compliance-section,
.network-section {
  background: var(--charcoal);
  color: var(--white);
}

.compliance-section p,
.network-section p,
.contact-section p,
.site-footer span {
  color: rgba(255, 255, 255, 0.68);
}

.compliance-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) 1fr;
  gap: 34px;
  align-items: stretch;
}

.certificate-frame {
  overflow: hidden;
  border: 1px solid rgba(230, 211, 166, 0.34);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.certificate-frame img {
  width: 100%;
  height: 100%;
  max-height: 560px;
  object-fit: cover;
}

.credential-list {
  display: grid;
  gap: 12px;
}

.credential-list div {
  padding: 18px 20px;
  border: 1px solid rgba(230, 211, 166, 0.24);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.88);
}

.network-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.74fr) 1fr;
  gap: 32px;
}

.network-copy {
  padding: 34px;
  border: 1px solid rgba(230, 211, 166, 0.24);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
}

.network-copy dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 34px 0 0;
  overflow: hidden;
  border: 1px solid rgba(230, 211, 166, 0.24);
  border-radius: var(--radius);
}

.network-copy dl div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.network-copy dt {
  color: var(--gold-soft);
  font-size: 26px;
  font-weight: 800;
}

.network-copy dd {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
  line-height: 1.5;
}

.network-media {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 14px;
}

.network-media img,
.partner-strip img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  border-radius: var(--radius);
  object-fit: cover;
}

.partner-strip {
  display: grid;
  grid-template-columns: 1fr 0.55fr;
  gap: 24px;
  margin-top: 24px;
}

.partner-strip figure {
  margin: 0;
}

.partner-strip figcaption {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
  line-height: 1.6;
}

.partner-notes {
  align-self: stretch;
  padding: 34px;
  border: 1px solid rgba(230, 211, 166, 0.24);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
}

.ops-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.ops-grid article {
  padding: 28px;
  background: var(--paper);
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr minmax(300px, 420px);
  gap: 42px;
  align-items: center;
  background: var(--ink);
  color: var(--white);
}

.contact-card {
  padding: 32px;
  border: 1px solid rgba(230, 211, 166, 0.34);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.contact-card span {
  display: block;
  color: var(--gold-soft);
  font-size: 14px;
}

.contact-card a {
  display: block;
  margin: 12px 0;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 30px clamp(20px, 5vw, 72px);
  background: #11100d;
  color: var(--white);
}

.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer span {
  margin-top: 6px;
  font-size: 13px;
}

.site-footer a {
  color: var(--gold-soft);
}

@media (max-width: 1120px) {
  .hero,
  .platform-section,
  .compliance-layout,
  .network-grid,
  .partner-strip,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .role-grid,
  .control-band,
  .ops-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 10px;
  }

  .hero-proof,
  .bid-card,
  .data-grid,
  .role-grid,
  .flow-track,
  .control-band,
  .capability-board,
  .network-copy dl,
  .network-media,
  .ops-grid {
    grid-template-columns: 1fr;
  }

  .role-card,
  .flow-track article,
  .capability-board article {
    min-height: auto;
  }

  .card-index,
  .flow-track span {
    margin-bottom: 22px;
  }

  .network-media img,
  .partner-strip img {
    min-height: 260px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .section-pad {
    padding: 58px 18px;
  }

  .hero.section-pad {
    padding-top: 48px;
    padding-bottom: 36px;
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 30px;
  }

  .brand strong {
    font-size: 15px;
  }

  .brand small {
    display: none;
  }

  .hero-panel,
  .network-copy,
  .partner-notes,
  .contact-card {
    padding: 22px;
  }

  .hero-proof,
  .hero-panel {
    display: none;
  }

}