:root {
  --page: #eef4f8;
  --surface: #ffffff;
  --ink: #17202a;
  --muted: #667386;
  --line: rgba(23, 32, 42, 0.12);
  --deep: #101827;
  --deep-2: #0b1320;
  --teal: #00a889;
  --teal-strong: #00d4aa;
  --blue: #2d6cdf;
  --amber: #ffb13d;
  --soft-blue: #e9f1ff;
  --soft-teal: #e7fbf6;
  --shadow: 0 24px 70px rgba(16, 24, 39, 0.14);
  --max: 1240px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: "SF Pro Display", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

::selection {
  background: var(--teal-strong);
  color: #06120f;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(16, 24, 39, 0.9);
  color: #fff;
  backdrop-filter: blur(20px) saturate(135%);
}

.header-inner {
  width: min(1320px, calc(100% - 48px));
  min-height: 96px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand,
.brand-copy,
.nav-links,
.header-download,
.button,
.service-label,
.hero-tags,
.console-top,
.console-top div,
.device-checks,
.plan-title,
.download-card,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  min-width: 340px;
  flex: 0 0 auto;
}

.brand-logo {
  width: 336px;
  height: 92px;
  object-fit: contain;
}

.brand-copy {
  align-items: flex-start;
  flex-direction: column;
  gap: 2px;
  line-height: 1;
}

.brand-copy strong {
  font-size: 18px;
}

.brand-copy small {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.nav-links {
  gap: 22px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  white-space: nowrap;
}

.nav-links a {
  transition: color 180ms ease;
}

.nav-links a:hover {
  color: #fff;
}

.header-download {
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 8px;
  background: #fff;
  color: var(--deep);
  font-size: 14px;
  font-weight: 800;
}

.header-download svg,
.button svg,
.service-label svg,
.feature-card svg,
.device-checks svg,
.plan-title svg,
.download-card svg {
  width: 18px;
  height: 18px;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 660px;
  padding: 74px 0 58px;
  background: var(--deep);
  color: #fff;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg, rgba(16, 24, 39, 0.94), rgba(16, 24, 39, 0.74) 52%, rgba(16, 24, 39, 0.88)),
    linear-gradient(90deg, rgba(0, 212, 170, 0.16) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: auto, 64px 64px, 64px 64px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -38% 38%;
  height: 420px;
  transform: rotate(-10deg);
  background: linear-gradient(90deg, rgba(0, 168, 137, 0.22), rgba(255, 177, 61, 0.16));
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(520px, 1.06fr);
  gap: 52px;
  align-items: center;
}

.service-label {
  gap: 9px;
  width: fit-content;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(0, 212, 170, 0.28);
  border-radius: 8px;
  background: rgba(0, 212, 170, 0.1);
  color: var(--teal-strong);
  font-size: 14px;
  font-weight: 800;
}

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(52px, 5.6vw, 82px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero h1 span {
  display: block;
  white-space: nowrap;
}

.hero h1 span + span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.92);
}

.brand-slogan {
  margin: 16px 0 0;
  color: var(--teal-strong);
  font-size: 24px;
  font-weight: 900;
}

.hero-lead {
  max-width: 640px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 19px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--teal-strong), #f7fbff);
  color: #071a17;
  box-shadow: 0 18px 46px rgba(0, 212, 170, 0.22);
}

.button-ghost {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.button-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
}

.hero-tags {
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-tags span {
  padding: 9px 12px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.hero-console {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.console-top {
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  padding: 0 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.console-top div {
  gap: 10px;
}

.console-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal-strong);
  box-shadow: 0 0 0 6px rgba(0, 212, 170, 0.13);
}

.status-pill {
  padding: 7px 10px;
  border-radius: 8px;
  background: rgba(0, 212, 170, 0.12);
  color: var(--teal-strong);
  font-size: 13px;
  font-weight: 800;
}

.console-body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) 220px;
  gap: 16px;
  padding: 18px;
}

.device-preview {
  overflow: hidden;
  border-radius: 8px;
  background: #060b12;
}

.device-preview img {
  height: 362px;
  width: 100%;
  object-fit: cover;
  object-position: 54% center;
}

.device-board {
  display: grid;
  gap: 12px;
}

.device-row {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
}

.device-row span,
.device-row strong {
  display: block;
}

.device-row span {
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.device-row strong {
  margin-top: 10px;
  font-size: 20px;
}

.metric-band {
  position: relative;
  z-index: 2;
  margin-top: -36px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.metric-grid div {
  padding: 24px 26px;
  border-right: 1px solid var(--line);
}

.metric-grid div:last-child {
  border-right: 0;
}

.metric-grid strong,
.metric-grid span {
  display: block;
}

.metric-grid strong {
  font-size: 20px;
}

.metric-grid span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.slogan-board {
  width: min(var(--max), calc(100% - 48px));
  margin: 28px auto 0;
}

.slogan-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 1.1fr;
  gap: 12px;
}

.slogan-grid p {
  margin: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--deep);
  font-size: 17px;
  font-weight: 900;
  line-height: 1.5;
  box-shadow: 0 14px 34px rgba(16, 24, 39, 0.06);
}

.section {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 88px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 34px;
}

.section-kicker {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.section-head h2,
.device-copy h2,
.download-panel h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.14;
  letter-spacing: 0;
}

.section-head p,
.device-copy p,
.download-panel p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

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

.feature-card,
.plan-card,
.process-step {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.feature-card {
  min-height: 226px;
  padding: 28px;
  box-shadow: 0 18px 50px rgba(16, 24, 39, 0.06);
}

.feature-card svg {
  width: 34px;
  height: 34px;
  color: var(--blue);
}

.feature-card h3,
.plan-card h3,
.process-step h3 {
  margin: 20px 0 0;
  font-size: 22px;
}

.feature-card p,
.plan-card p,
.process-step p,
.faq-list p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.device-section {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(420px, 1.04fr);
  gap: 40px;
  align-items: center;
  padding-top: 36px;
}

.device-checks {
  align-items: flex-start;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.device-checks span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
}

.device-checks svg {
  color: var(--teal);
}

.version-panel {
  overflow: hidden;
  border-radius: 8px;
  background: var(--deep);
  color: #fff;
  box-shadow: var(--shadow);
}

.version-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.version-header span {
  color: rgba(255, 255, 255, 0.52);
}

.version-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.version-list div {
  min-height: 138px;
  padding: 24px;
  background: var(--deep-2);
}

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

.version-list span {
  color: rgba(255, 255, 255, 0.48);
  font-size: 14px;
}

.version-list strong {
  margin-top: 38px;
  font-size: 24px;
}

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

.plan-card {
  padding: 28px;
}

.plan-card.highlight {
  border-color: rgba(0, 168, 137, 0.42);
  background: linear-gradient(180deg, var(--soft-teal), #fff);
}

.plan-title {
  gap: 12px;
}

.plan-title svg {
  width: 30px;
  height: 30px;
  color: var(--teal);
}

.plan-title h3 {
  margin: 0;
}

.plan-card a {
  display: inline-flex;
  margin-top: 22px;
  color: var(--blue);
  font-weight: 900;
}

.process-section {
  padding-top: 40px;
}

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

.process-step {
  min-height: 220px;
  padding: 28px;
}

.process-step span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--soft-blue);
  color: var(--blue);
  font-weight: 900;
}

.download-panel {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 34px;
  align-items: center;
  padding: 44px;
  border-radius: 8px;
  background:
    linear-gradient(115deg, rgba(0, 212, 170, 0.14), rgba(45, 108, 223, 0.13)),
    var(--deep);
  color: #fff;
  box-shadow: var(--shadow);
}

.download-panel p {
  color: rgba(255, 255, 255, 0.7);
}

.download-card {
  align-items: flex-start;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.download-card > svg {
  width: 38px;
  height: 38px;
  color: var(--teal-strong);
}

.download-card strong {
  font-size: 22px;
}

.download-card span {
  color: rgba(255, 255, 255, 0.64);
}

.download-card .button {
  width: 100%;
  margin-top: 8px;
}

.faq-section {
  padding-top: 88px;
}

.faq-list {
  display: grid;
  gap: 10px;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

summary {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px;
  cursor: pointer;
  font-size: 18px;
  font-weight: 900;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  color: var(--teal);
}

details[open] summary::after {
  content: "-";
}

.faq-list p {
  padding: 0 24px 22px;
}

.site-footer {
  justify-content: space-between;
  align-items: flex-start;
  gap: 28px;
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer div {
  display: grid;
  gap: 6px;
}

.site-footer strong {
  color: var(--ink);
  font-size: 18px;
}

.site-footer p {
  max-width: 660px;
  margin: 0;
  line-height: 1.7;
}

.footer-legal {
  justify-items: end;
  text-align: right;
}

.icp-link {
  width: fit-content;
  justify-self: end;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  transition: color 180ms ease;
}

.icp-link:hover {
  color: var(--teal);
}

@media (max-width: 1080px) {
  .nav-links {
    display: none;
  }

  .hero-layout,
  .device-section,
  .download-panel {
    grid-template-columns: 1fr;
  }

  .hero-console {
    max-width: 760px;
  }

  .feature-grid,
  .plan-grid,
  .process-line,
  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .container,
  .section,
  .download-panel,
  .site-footer,
  .header-inner {
    width: min(100% - 28px, var(--max));
  }

  .header-inner {
    min-height: 64px;
  }

  .brand-copy small {
    display: none;
  }

  .brand {
    min-width: 232px;
  }

  .brand-logo {
    width: 232px;
    height: 64px;
  }

  .header-download {
    min-height: 36px;
    padding: 0 11px;
    font-size: 13px;
  }

  .hero {
    min-height: auto;
    padding: 54px 0 42px;
  }

  .hero-layout {
    gap: 28px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero h1 span {
    white-space: normal;
  }

  .brand-slogan {
    font-size: 20px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions,
  .console-body,
  .metric-grid,
  .slogan-grid,
  .feature-grid,
  .plan-grid,
  .process-line,
  .version-list {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .device-preview img {
    height: 240px;
  }

  .metric-band {
    margin-top: 0;
  }

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

  .metric-grid div:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 62px 0;
  }

  .download-panel {
    padding: 28px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-legal {
    justify-items: start;
    text-align: left;
  }

  .icp-link {
    justify-self: start;
  }
}