:root {
  color-scheme: light;
  --ink: #121412;
  --paper: #f3f4f1;
  --white: #ffffff;
  --line: #d6d9d3;
  --muted: #5f655f;
  --green: #0b7658;
  --green-dark: #075440;
  --coral: #d85f3d;
  --header-height: 72px;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.65;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 20;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5vw;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
  color: var(--white);
  background: var(--ink);
  border-radius: 4px;
  font-size: 13px;
  line-height: 1;
}

.desktop-nav,
.footer-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.desktop-nav a,
.footer-links a {
  color: var(--muted);
  font-size: 14px;
}

.desktop-nav a:hover,
.footer-links a:hover {
  color: var(--green);
}

.icon-button {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.icon-button svg,
.button svg,
.service-card svg,
.status-row > svg,
.status-icon svg {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
}

.menu-button {
  display: none;
}

.mobile-nav {
  position: absolute;
  z-index: 19;
  left: 0;
  right: 0;
  padding: 12px 5vw 20px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.mobile-nav a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.hero {
  position: relative;
  min-height: calc(88svh - var(--header-height));
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: var(--white);
  background: #252825;
}

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

.hero-image {
  object-fit: cover;
  object-position: center 56%;
}

.hero-shade {
  background: rgba(13, 16, 14, 0.68);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(900px, 90vw);
  padding: 9vh 5vw 8vh;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero .eyebrow,
.light .eyebrow,
.about-band .eyebrow {
  color: #7ed7b9;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 20px;
  font-size: 66px;
  line-height: 1.08;
}

.hero-copy {
  max-width: 660px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 20px;
}

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

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-weight: 700;
  cursor: pointer;
}

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

.button-primary:hover {
  background: var(--green-dark);
}

.button-secondary {
  color: var(--white);
  background: rgba(18, 20, 18, 0.54);
  border-color: rgba(255, 255, 255, 0.62);
}

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

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

.service-indicator {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #66d4a8;
  box-shadow: 0 0 0 4px rgba(102, 212, 168, 0.18);
}

.signal-band {
  min-height: 12svh;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  gap: 18px;
  padding: 18px 5vw;
  color: var(--muted);
  background: var(--white);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  font-weight: 700;
}

.signal-band div:not(:last-child) {
  border-right: 1px solid var(--line);
}

.section {
  padding: 104px 5vw;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 46px;
}

.section-heading h2,
.about-band h2 {
  margin-bottom: 16px;
  font-size: 40px;
  line-height: 1.2;
}

.section-heading > p:last-child,
.service-card p,
.workflow-list p,
.about-band > p {
  color: var(--muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.service-card {
  position: relative;
  min-height: 260px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.service-card > svg {
  width: 28px;
  height: 28px;
  margin-bottom: 42px;
  color: var(--green);
}

.service-card h3 {
  margin-bottom: 8px;
  font-size: 21px;
}

.service-card p {
  max-width: 310px;
  margin-bottom: 0;
  font-size: 14px;
}

.service-number {
  position: absolute;
  top: 26px;
  right: 28px;
  color: #a8aea8;
  font-size: 13px;
}

.status-section {
  padding: 92px 5vw;
  color: var(--white);
  background: #191c19;
}

.status-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 8vw;
  align-items: start;
}

.section-heading.light {
  margin-bottom: 0;
}

.section-heading.light > p:last-child {
  color: #aeb5ae;
}

.status-list {
  border-top: 1px solid #414741;
}

.status-row {
  min-height: 94px;
  display: grid;
  grid-template-columns: 44px 1fr 24px;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid #414741;
}

.status-row:hover {
  color: #7ed7b9;
}

.status-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: #272b27;
  border-radius: 4px;
}

.status-row strong,
.status-row small {
  display: block;
}

.status-row small {
  margin-top: 2px;
  color: #aeb5ae;
}

.workflow {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(480px, 1.2fr);
  gap: 8vw;
}

.workflow-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.workflow-list li {
  min-height: 132px;
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.workflow-list > li > span {
  color: var(--coral);
  font-weight: 700;
}

.workflow-list strong {
  display: block;
  font-size: 18px;
}

.workflow-list p {
  margin: 4px 0 0;
  font-size: 14px;
}

.about-band {
  display: grid;
  grid-template-columns: minmax(320px, 1.25fr) minmax(300px, 0.75fr);
  gap: 9vw;
  align-items: end;
  padding: 92px 5vw;
  color: var(--white);
  background: var(--green-dark);
}

.about-band h2 {
  max-width: 760px;
  margin-bottom: 0;
}

.about-band > p {
  margin-bottom: 0;
  color: #c8ddd5;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 6vw;
  padding: 48px 5vw;
  background: var(--white);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.footer-meta {
  text-align: right;
  font-size: 12px;
}

.footer-meta a {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.service-dialog {
  width: min(440px, calc(100vw - 32px));
  padding: 34px;
  color: var(--ink);
  background: var(--white);
  border: 0;
  border-radius: 6px;
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.28);
}

.service-dialog::backdrop {
  background: rgba(10, 12, 10, 0.72);
}

.dialog-close {
  position: absolute;
  top: 8px;
  right: 8px;
}

.dialog-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  color: var(--green);
  background: #e6f2ed;
  border-radius: 4px;
}

.service-dialog h2 {
  margin-bottom: 10px;
  font-size: 25px;
}

.service-dialog p {
  color: var(--muted);
}

.dialog-confirm {
  width: 100%;
  margin-top: 12px;
}

:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
}

@media (max-width: 860px) {
  h1 {
    font-size: 48px;
  }

  .service-grid,
  .status-inner,
  .workflow,
  .about-band {
    grid-template-columns: 1fr;
  }

  .status-inner,
  .workflow {
    gap: 38px;
  }

  .about-band {
    gap: 30px;
  }

  .site-footer {
    grid-template-columns: 1fr 1fr;
  }

  .footer-meta {
    grid-column: 1 / -1;
    text-align: left;
  }
}

@media (max-width: 620px) {
  :root {
    --header-height: 64px;
  }

  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: inline-grid;
  }

  .hero {
    min-height: calc(78svh - var(--header-height));
  }

  .hero-content {
    width: 100%;
    padding: 64px 5vw 46px;
  }

  h1 {
    font-size: 42px;
  }

  .hero-copy {
    font-size: 17px;
  }

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

  .signal-band {
    min-height: 22svh;
    grid-template-columns: repeat(2, 1fr);
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .signal-band div:nth-child(2) {
    border-right: 0;
  }

  .section,
  .status-section,
  .about-band {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .section-heading h2,
  .about-band h2 {
    font-size: 32px;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .status-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .workflow-list li {
    grid-template-columns: 44px 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 14px 24px;
  }

  .footer-meta {
    grid-column: auto;
  }
}

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