:root {
  --ink: #10233f;
  --muted: #5e718c;
  --line: #dce8f3;
  --paper: #f7fbff;
  --card: rgba(255, 255, 255, 0.9);
  --blue: #087cf0;
  --cyan: #12cbd3;
  --navy: #07192f;
  --red: #f23858;
  --green: #14a783;
  --shadow: 0 24px 70px rgba(24, 78, 128, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 10%, rgba(18, 203, 211, 0.1), transparent 30rem),
    linear-gradient(180deg, #fbfdff 0%, #f1f7fc 55%, #fff 100%);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(8, 124, 240, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 124, 240, 0.07) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, #000, transparent 72%);
}

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

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

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 9px 14px;
  color: #fff;
  background: var(--navy);
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.container {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid rgba(206, 222, 237, 0.82);
  background: rgba(251, 253, 255, 0.88);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(145deg, var(--blue), var(--cyan));
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(8, 124, 240, 0.3);
}

.brand-mark::after {
  position: absolute;
  width: 25px;
  height: 2px;
  content: "";
  background: rgba(255, 255, 255, 0.72);
  transform: rotate(-38deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #38506d;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--blue);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.language {
  color: #5b6e86;
  font-size: 13px;
  font-weight: 700;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 11px;
  font-size: 20px;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 19px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 800;
  line-height: 1.2;
  transition: 0.22s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), #0f9fd7);
  box-shadow: 0 12px 30px rgba(8, 124, 240, 0.25);
}

.btn-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.88);
  border-color: var(--line);
}

.btn-dark {
  color: #fff;
  background: var(--navy);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 15px;
  padding: 6px 11px;
  color: #08729b;
  background: #e7fafa;
  border: 1px solid #c6eff0;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.pulse {
  width: 7px;
  height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(18, 203, 211, 0.12);
}

.hero {
  position: relative;
  padding: 82px 0 54px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  align-items: center;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 66px;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(43px, 6vw, 76px);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.hero h1 span {
  color: transparent;
  background: linear-gradient(115deg, var(--blue), #0daab6);
  background-clip: text;
}

.hero-copy > p {
  max-width: 660px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.micro-note {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 26px;
  color: #536b85;
  font-size: 13px;
  font-weight: 700;
}

.micro-note span::before {
  margin-right: 6px;
  color: var(--green);
  content: "✓";
}

.lab-visual {
  position: relative;
  min-height: 500px;
}

.chip-panel {
  position: absolute;
  inset: 22px 10px 35px 18px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(232, 247, 252, 0.9)),
    #fff;
  border: 1px solid #d7e9f4;
  border-radius: 34px;
  box-shadow: var(--shadow);
}

.chip-panel::before,
.chip-panel::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(8, 124, 240, 0.2);
  border-radius: 50%;
}

.chip-panel::before {
  width: 380px;
  height: 380px;
  top: -125px;
  right: -105px;
}

.chip-panel::after {
  width: 250px;
  height: 250px;
  right: -60px;
  bottom: -80px;
}

.circuit {
  position: absolute;
  inset: 0;
  opacity: 0.42;
  background:
    linear-gradient(90deg, transparent 14%, var(--cyan) 14% 14.3%, transparent 14.3% 78%, var(--blue) 78% 78.3%, transparent 78.3%),
    linear-gradient(0deg, transparent 28%, var(--blue) 28% 28.3%, transparent 28.3% 67%, var(--cyan) 67% 67.3%, transparent 67.3%);
}

.rocket-main {
  position: absolute;
  z-index: 2;
  width: min(76%, 380px);
  max-height: 420px;
  inset: 50% auto auto 50%;
  object-fit: contain;
  filter: drop-shadow(0 22px 24px rgba(10, 57, 101, 0.2));
  transform: translate(-50%, -50%);
}

.status-card {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  color: #21425e;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid #d9e9f1;
  border-radius: 14px;
  box-shadow: 0 12px 25px rgba(20, 62, 96, 0.12);
  font-size: 12px;
  font-weight: 800;
  backdrop-filter: blur(12px);
}

.status-card strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
}

.status-a {
  top: 7px;
  right: 0;
}

.status-b {
  bottom: 7px;
  left: 0;
}

.status-dot {
  width: 10px;
  height: 10px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(20, 167, 131, 0.12);
}

.trust-strip {
  display: grid;
  margin-top: 30px;
  padding: 20px 26px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 16px 50px rgba(27, 71, 111, 0.09);
  grid-template-columns: repeat(3, 1fr);
}

.trust-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  color: #38516b;
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}

.trust-item + .trust-item {
  border-left: 1px solid var(--line);
}

.trust-icon {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--blue);
  background: #eaf5ff;
  border-radius: 10px;
}

.section {
  padding: 90px 0;
}

.section-soft {
  background: rgba(233, 244, 252, 0.56);
  border-block: 1px solid #e0edf6;
}

.section-dark {
  color: #eaf5ff;
  background:
    radial-gradient(circle at 20% 0, rgba(18, 203, 211, 0.16), transparent 32rem),
    var(--navy);
}

.section-head {
  max-width: 700px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-head.left {
  margin-inline: 0;
  text-align: left;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.section-head p {
  margin: 15px 0 0;
  color: var(--muted);
}

.section-dark .section-head p {
  color: #9fb6ca;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.metric {
  padding: 25px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 10px 34px rgba(27, 74, 116, 0.07);
}

.metric strong {
  display: block;
  color: var(--blue);
  font-size: 28px;
  letter-spacing: -0.04em;
}

.metric span {
  color: #60748c;
  font-size: 13px;
  font-weight: 700;
}

.metric-note {
  margin: 12px 0 0;
  color: #71849a;
  font-size: 12px;
  text-align: right;
}

.feature-grid,
.review-grid,
.price-grid,
.download-grid,
.help-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card,
.review-card,
.download-card,
.help-card {
  padding: 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 13px 40px rgba(25, 68, 108, 0.08);
}

.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  position: absolute;
  width: 120px;
  height: 120px;
  right: -55px;
  bottom: -60px;
  content: "";
  background: radial-gradient(circle, rgba(18, 203, 211, 0.2), transparent 68%);
}

.feature-number {
  display: inline-grid;
  width: 43px;
  height: 43px;
  place-items: center;
  color: var(--blue);
  background: #eaf5ff;
  border: 1px solid #cee8ff;
  border-radius: 13px;
  font-size: 13px;
  font-weight: 900;
}

.feature-card h3,
.review-card h3,
.download-card h3,
.help-card h3 {
  margin: 20px 0 8px;
  font-size: 20px;
}

.feature-card p,
.review-card p,
.download-card p,
.help-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.split {
  display: grid;
  align-items: center;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 70px;
}

.media-frame {
  position: relative;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 19px;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.node {
  padding: 18px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(177, 217, 240, 0.16);
  border-radius: 15px;
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.node strong {
  color: #fff;
}

.node span {
  color: #7cdecd;
  font-size: 12px;
  font-weight: 800;
}

.node-bar {
  height: 5px;
  margin-top: 12px;
  overflow: hidden;
  background: #183653;
  border-radius: 99px;
}

.node-bar i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), #6ff1cf);
  border-radius: inherit;
}

.review-card .stars {
  color: #f2a31a;
  letter-spacing: 3px;
}

.review-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.avatar {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-radius: 50%;
  font-weight: 900;
}

.review-meta small {
  display: block;
  color: var(--muted);
}

.price-card {
  position: relative;
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 13px 40px rgba(24, 67, 104, 0.08);
}

.price-card.featured {
  border-color: rgba(8, 124, 240, 0.55);
  box-shadow: 0 25px 70px rgba(8, 124, 240, 0.17);
  transform: translateY(-10px);
}

.price-tag {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 4px 9px;
  color: #fff;
  background: var(--blue);
  border-radius: 99px;
  font-size: 11px;
  font-weight: 900;
}

.price-card h3 {
  margin: 0;
}

.price {
  margin: 18px 0 4px;
  font-size: 35px;
  font-weight: 900;
  letter-spacing: -0.05em;
}

.price small {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.price-card ul {
  margin: 22px 0 26px;
  padding: 0;
  list-style: none;
}

.price-card li {
  padding: 7px 0;
  color: #526a82;
  font-size: 14px;
}

.price-card li::before {
  margin-right: 8px;
  color: var(--green);
  content: "✓";
  font-weight: 900;
}

.price-card .btn {
  width: 100%;
}

.faq-list {
  max-width: 860px;
  margin-inline: auto;
}

.faq-item {
  margin-bottom: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
}

.faq-item summary {
  position: relative;
  padding: 20px 52px 20px 22px;
  cursor: pointer;
  font-weight: 900;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  position: absolute;
  top: 17px;
  right: 20px;
  color: var(--blue);
  content: "+";
  font-size: 24px;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-content {
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 14px;
}

.faq-content ol {
  margin-bottom: 0;
  padding-left: 20px;
}

.page-hero {
  padding: 72px 0 48px;
}

.page-hero-grid {
  display: grid;
  align-items: center;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.05em;
}

.page-hero p {
  max-width: 680px;
  color: var(--muted);
  font-size: 17px;
}

.page-visual img {
  width: 100%;
  max-height: 380px;
  object-fit: contain;
  filter: drop-shadow(0 24px 35px rgba(15, 55, 91, 0.16));
}

.download-card {
  display: flex;
  flex-direction: column;
}

.platform {
  display: flex;
  width: 54px;
  height: 54px;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  background: #eaf5ff;
  border-radius: 16px;
  font-size: 22px;
  font-weight: 900;
}

.download-card .btn {
  width: 100%;
  margin-top: auto;
}

.download-card ul {
  margin: 20px 0 24px;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
}

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

.step {
  position: relative;
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  counter-increment: step;
}

.step::before {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 19px;
  place-items: center;
  color: #fff;
  content: counter(step, decimal-leading-zero);
  background: var(--navy);
  border-radius: 12px;
  font-weight: 900;
}

.step h3 {
  margin: 0 0 8px;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

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

.help-card a {
  display: inline-block;
  margin-top: 15px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.article {
  max-width: 820px;
  margin-inline: auto;
}

.article h2 {
  margin: 46px 0 12px;
  font-size: 28px;
}

.article h3 {
  margin: 28px 0 8px;
  font-size: 20px;
}

.article p,
.article li {
  color: #536c85;
}

.article-callout {
  margin: 30px 0;
  padding: 22px;
  background: #ebf7ff;
  border-left: 4px solid var(--blue);
  border-radius: 0 14px 14px 0;
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 38px 42px;
  color: #fff;
  background:
    radial-gradient(circle at 80% 0, rgba(18, 203, 211, 0.35), transparent 18rem),
    var(--navy);
  border-radius: 27px;
  box-shadow: var(--shadow);
}

.cta-band h2 {
  margin: 0 0 5px;
}

.cta-band p {
  margin: 0;
  color: #aac1d3;
}

.site-footer {
  margin-top: 80px;
  padding: 55px 0 24px;
  color: #9fb4c7;
  background: #061426;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
}

.footer-brand p {
  max-width: 360px;
  color: #7f99ad;
  font-size: 13px;
}

.site-footer h3 {
  margin: 0 0 15px;
  color: #fff;
  font-size: 14px;
}

.footer-links {
  display: grid;
  gap: 9px;
  font-size: 13px;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 42px;
  padding-top: 20px;
  border-top: 1px solid #193047;
  font-size: 12px;
}

@media (max-width: 920px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    right: 20px;
    left: 20px;
    display: none;
    padding: 18px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 10px;
  }

  .language,
  .nav-actions > .btn {
    display: none;
  }

  .hero-grid,
  .page-hero-grid,
  .split {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 55px;
  }

  .lab-visual {
    min-height: 450px;
  }

  .metric-grid,
  .feature-grid,
  .review-grid,
  .price-grid,
  .download-grid,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .price-card.featured {
    transform: none;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 26px, 1160px);
  }

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

  .hero-copy > p {
    font-size: 16px;
  }

  .lab-visual {
    min-height: 390px;
  }

  .trust-strip,
  .metric-grid,
  .feature-grid,
  .review-grid,
  .price-grid,
  .download-grid,
  .help-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .trust-item {
    justify-content: flex-start;
    padding: 10px 0;
  }

  .trust-item + .trust-item {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .section {
    padding: 65px 0;
  }

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

  .cta-band,
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .cta-band {
    padding: 28px;
  }

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

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}