:root {
  --ink: #17252b;
  --teal: #123f3d;
  --teal-2: #1f5f5a;
  --sage: #6f8b80;
  --gold: #b99454;
  --gold-soft: #dfc99a;
  --paper: #f4efe7;
  --warm: #ebe4d9;
  --white: #ffffff;
  --muted: #667575;
  --line: rgba(23, 37, 43, 0.13);
  --cta: #c95b41;
  --cta-2: #a84634;
  --shadow: 0 18px 54px rgba(23, 37, 43, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  background: var(--paper);
  line-height: 1.65;
  letter-spacing: 0;
}

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

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;
  min-height: 76px;
  padding: 14px 42px;
  color: var(--white);
  background: rgba(18, 63, 61, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(18px);
  transition: background 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(18, 63, 61, 0.96);
  box-shadow: 0 12px 36px rgba(13, 35, 37, 0.22);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--teal);
  font-weight: 800;
  background: linear-gradient(135deg, #f4dfab, var(--gold));
  border-radius: 50%;
}

.brand strong,
.footer-brand strong {
  display: block;
  font-size: 1.13rem;
  line-height: 1.1;
}

.brand em {
  display: block;
  margin-top: 4px;
  font-size: 0.72rem;
  font-style: normal;
  color: rgba(255, 255, 255, 0.76);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.94rem;
}

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

.site-nav a::after {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1px;
  height: 2px;
  content: "";
  background: var(--gold-soft);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--white);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
}

svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.hero {
  position: relative;
  min-height: 780px;
  overflow: hidden;
  color: var(--white);
  background: var(--teal);
}

.hero-media,
.hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-media img {
  object-fit: cover;
  object-position: center;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(14, 45, 45, 0.92) 0%, rgba(14, 45, 45, 0.78) 35%, rgba(14, 45, 45, 0.22) 68%, rgba(14, 45, 45, 0.08) 100%),
    linear-gradient(0deg, rgba(14, 45, 45, 0.48), rgba(14, 45, 45, 0.04) 42%);
}

.hero-inner {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 780px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding-top: 92px;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold-soft);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 790px;
  font-size: 4.25rem;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 680px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.08rem;
}

.hero-note {
  max-width: 640px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.98rem;
}

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

.action-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0 26px;
  color: var(--white);
  font-weight: 800;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--cta), #d57453);
  box-shadow: 0 14px 34px rgba(184, 86, 62, 0.25);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.action-pill svg {
  flex: 0 0 auto;
  margin-right: 9px;
}

.action-pill:hover,
.action-pill:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 42px rgba(184, 86, 62, 0.32);
}

.action-pill-alt {
  background: linear-gradient(135deg, var(--teal-2), #2f766d);
  box-shadow: 0 14px 34px rgba(18, 63, 61, 0.24);
}

.contact-line {
  display: inline-grid;
  grid-template-columns: max-content max-content;
  gap: 0;
  align-items: center;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.88);
  font-weight: 800;
  background: rgba(11, 45, 43, 0.52);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.contact-line a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 18px;
  white-space: nowrap;
}

.contact-line a + a {
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

.contact-line svg {
  width: 18px;
  height: 18px;
  color: var(--gold-soft);
}

.proof-bar {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(1180px, calc(100% - 48px));
  margin: -68px auto 0;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.proof-bar div {
  min-height: 132px;
  padding: 28px;
  border-right: 1px solid var(--line);
}

.proof-bar div:last-child {
  border-right: 0;
}

.proof-bar strong {
  display: block;
  color: var(--teal);
  font-size: 1.28rem;
}

.proof-bar span {
  display: block;
  margin-top: 9px;
  color: var(--muted);
}

.section {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 104px 0;
  scroll-margin-top: 92px;
}

.section-head {
  max-width: 790px;
  margin-bottom: 42px;
}

.section-head h2,
.split-copy h2,
.enterprise-card h2,
.community-copy h2 {
  margin: 0;
  color: var(--teal);
  font-size: 2.38rem;
  line-height: 1.22;
  letter-spacing: 0;
}

.section-head p:not(.eyebrow),
.split-copy p,
.enterprise-card p,
.community-copy p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.audience-grid,
.standard-grid,
.boundary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.audience-grid article,
.standard-grid article,
.boundary-grid article,
.system-card {
  min-height: 240px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 14px 38px rgba(23, 37, 43, 0.07);
}

.standard-grid,
.boundary-grid {
  grid-template-columns: repeat(4, 1fr);
}

.card-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  color: var(--teal);
  background: #efe4cf;
  border-radius: 50%;
}

.audience-grid h3,
.standard-grid h3,
.boundary-grid h3,
.system-card h3 {
  margin: 22px 0 9px;
  color: var(--teal);
  font-size: 1.18rem;
}

.audience-grid p,
.standard-grid p,
.boundary-grid p,
.system-card p {
  margin: 0;
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 52px;
  align-items: center;
}

.split-section.reverse {
  grid-template-columns: 1.08fr 0.92fr;
}

.image-panel,
.wide-image {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--teal);
}

.image-panel img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.sample-carousel {
  min-width: 0;
}

.carousel-viewport {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--teal);
  box-shadow: var(--shadow);
}

.carousel-track {
  display: flex;
  transition: transform 420ms ease;
  will-change: transform;
}

.carousel-slide {
  position: relative;
  flex: 0 0 100%;
  margin: 0;
  background: var(--teal);
}

.carousel-slide img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.carousel-slide figcaption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 8px 13px;
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 800;
  background: rgba(18, 63, 61, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  backdrop-filter: blur(10px);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 16px;
}

.carousel-btn {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--teal);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease;
}

.carousel-btn:hover,
.carousel-btn:focus-visible {
  transform: translateY(-1px);
  background: var(--white);
}

.carousel-dots {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 8px;
}

.carousel-dot {
  display: block;
  flex: 1 1 0;
  height: 3px;
  padding: 0;
  background: rgba(18, 63, 61, 0.18);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.carousel-dot.is-active {
  background: var(--teal-2);
}

.systems-grid-section {
  padding-top: 12px;
}

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

.system-card {
  background: var(--teal);
  color: var(--white);
  box-shadow: none;
}

.system-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 32px;
  color: var(--teal);
  background: var(--gold-soft);
  border-radius: 999px;
  font-weight: 900;
}

.system-card h3 {
  color: var(--white);
}

.system-card p {
  color: rgba(255, 255, 255, 0.78);
}

.system-card small {
  display: block;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.85rem;
}

.check-grid,
.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.check-grid span,
.feature-list span {
  position: relative;
  min-height: 46px;
  padding: 11px 14px 11px 38px;
  color: var(--teal);
  font-weight: 800;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-grid span::before,
.feature-list span::before {
  position: absolute;
  left: 15px;
  top: 18px;
  width: 8px;
  height: 8px;
  content: "";
  background: var(--gold);
  border-radius: 50%;
}

.standards-section {
  width: 100%;
  max-width: none;
  padding: 104px max(24px, calc((100% - 1180px) / 2));
  background: var(--warm);
}

.standards-section .section-head {
  max-width: 100%;
}

.enterprise-section {
  padding-bottom: 68px;
}

.enterprise-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
  padding: 42px;
  color: var(--white);
  background: linear-gradient(135deg, var(--teal), #264f4b);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.enterprise-card h2 {
  color: var(--white);
}

.enterprise-card p {
  color: rgba(255, 255, 255, 0.76);
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.benefit-grid article {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
}

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

.benefit-grid h3 {
  margin: 16px 16px 8px;
  color: var(--white);
  font-size: 1rem;
  line-height: 1.35;
}

.benefit-grid p {
  margin: 0 16px 18px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.flow-list li {
  position: relative;
  overflow: hidden;
  min-height: 0;
  padding: 0 0 22px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 14px 38px rgba(23, 37, 43, 0.07);
}

.flow-list li::before {
  counter-increment: flow;
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 44px;
  height: 32px;
  color: var(--teal);
  background: rgba(223, 201, 154, 0.92);
  border-radius: 999px;
  font-weight: 900;
}

.flow-list img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.flow-list strong,
.flow-list span {
  display: block;
}

.flow-list strong {
  margin: 20px 20px 0;
  color: var(--teal);
  font-size: 1.08rem;
}

.flow-list span {
  margin: 8px 20px 0;
  color: var(--muted);
  font-size: 0.93rem;
}

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

.compliance-note {
  margin-top: 24px;
  padding: 28px;
  background: #fff8eb;
  border: 1px solid rgba(185, 148, 84, 0.28);
  border-radius: var(--radius);
}

.compliance-note strong {
  display: block;
  color: var(--teal);
  font-size: 1.1rem;
}

.compliance-note p {
  margin: 10px 0 0;
  color: #5d6b68;
}

.site-footer {
  padding: 56px max(24px, calc((100% - 1180px) / 2)) 34px;
  color: var(--white);
  background: #0d2b2a;
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
}

.footer-brand p {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.68);
}

.footer-actions {
  justify-content: flex-end;
  margin-top: 0;
}

.footer-actions .action-pill {
  min-height: 52px;
}

.policy-links,
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.92rem;
}

.policy-links {
  color: rgba(255, 255, 255, 0.76);
}

.footer-meta {
  margin-top: 0;
  color: rgba(255, 255, 255, 0.5);
}

.legal-page {
  background: var(--paper);
}

.legal-shell {
  width: min(880px, calc(100% - 48px));
  margin: 0 auto;
  padding: 118px 0 78px;
}

.legal-shell h1 {
  margin: 0;
  color: var(--teal);
  font-size: 2.5rem;
  line-height: 1.2;
}

.legal-shell h2 {
  margin: 38px 0 12px;
  color: var(--teal);
  font-size: 1.34rem;
}

.legal-shell p,
.legal-shell li {
  color: var(--muted);
}

.legal-shell a {
  color: var(--teal-2);
  font-weight: 800;
}

.legal-meta {
  margin-top: 12px;
  color: var(--muted);
}

.legal-card {
  margin-top: 28px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.info-table th,
.info-table td {
  padding: 14px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.info-table th {
  color: var(--teal);
  background: #efe4cf;
}

.info-table tr:last-child td {
  border-bottom: 0;
}

@media (max-width: 1100px) {
  .site-nav {
    gap: 16px;
    font-size: 0.9rem;
  }

  .system-grid,
  .standard-grid,
  .boundary-grid,
  .flow-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 861px) {
  .standards-section .section-head h2 {
    white-space: nowrap;
  }
}

@media (max-width: 860px) {
  .site-header {
    min-height: 68px;
    padding: 12px 24px;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: rgba(18, 63, 61, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
  }

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

  .site-nav a {
    padding: 13px 12px;
  }

  .hero,
  .hero-inner {
    min-height: 720px;
  }

  .hero h1 {
    font-size: 3.1rem;
  }

  .proof-bar,
  .audience-grid,
  .split-section,
  .split-section.reverse,
  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-top {
    display: grid;
  }

  .proof-bar div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .proof-bar div:last-child {
    border-bottom: 0;
  }

  .split-section.reverse .image-panel,
  .split-section.reverse .sample-carousel {
    order: 2;
  }

  .footer-actions {
    justify-content: flex-start;
  }

  .benefit-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand em {
    display: none;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .hero,
  .hero-inner {
    min-height: 760px;
  }

  .hero-inner,
  .section,
  .proof-bar,
  .legal-shell {
    width: min(100% - 28px, 1180px);
  }

  .proof-bar {
    margin-top: -36px;
  }

  .hero-copy {
    padding-top: 24px;
  }

  .hero h1 {
    font-size: 2.35rem;
  }

  .hero-lede {
    font-size: 1rem;
  }

  .hero-actions,
  .footer-actions {
    flex-direction: column;
  }

  .contact-line {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
    border-radius: var(--radius);
  }

  .contact-line a {
    justify-content: center;
  }

  .contact-line a + a {
    border-top: 1px solid rgba(255, 255, 255, 0.18);
    border-left: 0;
  }

  .action-pill {
    width: 100%;
    min-height: 56px;
    padding: 0 18px;
    font-size: 0.95rem;
  }

  .section {
    padding: 76px 0;
  }

  .section-head h2,
  .split-copy h2,
  .enterprise-card h2,
  .community-copy h2,
  .legal-shell h1 {
    font-size: 1.95rem;
  }

  .systems-grid-section,
  .boundary-section {
    padding-top: 32px;
  }

  .system-grid,
  .standard-grid,
  .boundary-grid,
  .flow-list,
  .benefit-grid,
  .check-grid,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .enterprise-card,
  .compliance-note,
  .legal-card {
    padding: 24px;
  }
}