:root {
  color-scheme:dark;
  --bg:#0b1b2a;
  --surface:#112637;
  --ink:#f2ead9;
  --muted:#b0c2ca;
  --line:#2a4050;
  --mint:#a9e8d2;
  --gold:#e9c889;
  font:17px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-synthesis:none;
}

* {
  box-sizing:border-box;
}

html {
  scroll-behavior:smooth;
  scroll-padding-top:25px;
}

body {
  margin:0;
  background:var(--bg);
  color:var(--ink);
}

a {
  color:inherit;
  text-underline-offset:5px;
}

a:hover {
  color:var(--mint);
}

a:focus-visible,summary:focus-visible {
  outline:3px solid var(--mint);
  outline-offset:6px;
}

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

h1,h2,h3,p,figure {
  margin:0;
}

h1,h2,h3 {
  line-height:1.12;
  font-weight:600;
}

h1,h2 {
  font-family:Georgia,"Noto Serif",serif;
  letter-spacing:-.045em;
}

h1 {
  font-size:clamp(3.7rem,7.4vw,6.3rem);
  max-width:730px;
}

h2 {
  font-size:clamp(2.2rem,4.2vw,3.6rem);
}

h3 {
  font-size:1.25rem;
  letter-spacing:-.025em;
}

p {
  color:var(--muted);
}

.wrap {
  width:min(1180px,calc(100% - 72px));
  margin-inline:auto;
}

.skip {
  position:absolute;
  left:16px;
  top:-90px;
  background:var(--mint);
  color:var(--bg);
  padding:12px;
  z-index:9;
}

.skip:focus {
  top:12px;
}

.header {
  padding-block:26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  border-bottom:1px solid var(--line);
}

.brand {
  display:flex;
  align-items:center;
  gap:13px;
  text-decoration:none;
  font-weight:650;
  font-size:1.05rem;
}

.brand img {
  border-radius:13px;
  width:44px;
  height:44px;
}

.header nav {
  display:flex;
  gap:28px;
  align-items:center;
  font-size:.85rem;
}

.header nav a {
  text-decoration:none;
}

.language {
  border:1px solid var(--line);
  padding:6px 11px;
  border-radius:7px;
}

.eyebrow {
  font-size:.73rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--gold);
  font-weight:650;
  margin-bottom:22px;
}

.hero {
  display:grid;
  grid-template-columns:1.15fr .85fr;
  align-items:center;
  gap:40px;
  padding-block:82px 72px;
}

.status {
  display:inline-flex;
  align-items:center;
  gap:9px;
  border:1px solid #3b5c58;
  background:#132d31;
  border-radius:50px;
  padding:6px 13px;
  color:var(--mint);
  font-size:.73rem;
  margin-bottom:28px;
}

.status:before {
  content:"";
  width:6px;
  height:6px;
  background:var(--mint);
  border-radius:50%;
}

.hero .intro {
  max-width:520px;
  font-size:1.08rem;
  margin-top:27px;
}

.actions {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:22px;
  margin-top:31px;
}

.button {
  display:inline-flex;
  justify-content:center;
  align-items:center;
  gap:24px;
  text-decoration:none;
  background:var(--mint);
  color:#10242c;
  font-weight:650;
  font-size:.88rem;
  padding:15px 22px;
  border-radius:8px;
  min-height:52px;
}

.button:hover {
  color:#10242c;
  background:#c9f3e5;
}

.text-link {
  font-size:.85rem;
}

.fine {
  font-size:.76rem;
  margin-top:16px;
  max-width:530px;
}

.hero-art {
  position:relative;
  isolation:isolate;
  padding:0 20px 20px 55px;
}

.hero-art:before {
  content:"";
  position:absolute;
  inset:8% -10% 0 -18%;
  z-index:-1;
  background:radial-gradient(ellipse,#2b62634d,transparent 68%);
}

.hero-art .shot {
  width:300px;
  margin:auto;
  transform:rotate(4deg);
  box-shadow:0 30px 80px #0007;
}

.shot {
  overflow:hidden;
  border:1px solid #395262;
  border-radius:26px;
  background:#0a141e;
}

.hero-art figcaption {
  text-align:center;
  font-size:.72rem;
  letter-spacing:.03em;
  color:var(--muted);
  margin-top:28px;
}

.art-note {
  position:absolute;
  bottom:85px;
  left:-4px;
  background:#162f3c;
  border:1px solid #38535c;
  border-radius:12px;
  padding:12px 19px;
  box-shadow:0 10px 30px #0004;
  transform:rotate(-4deg);
  font-family:Georgia,serif;
  font-size:1.25rem;
  color:var(--gold);
}

.facts {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-block:1px solid var(--line);
  padding-block:27px;
  gap:24px;
}

.fact strong {
  display:block;
  font-family:Georgia,serif;
  font-size:2.1rem;
  font-weight:500;
  color:var(--gold);
  line-height:1.2;
}

.fact span {
  font-size:.76rem;
  color:var(--muted);
}

.section {
  padding-block:88px;
}

.section-head {
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap:36px;
  margin-bottom:36px;
}

.section-head p {
  max-width:370px;
  font-size:.93rem;
}

.section-head .eyebrow {
  margin-bottom:16px;
}

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

.how article {
  border-top:1px solid var(--line);
  padding-top:22px;
}

.number {
  display:block;
  color:var(--gold);
  font:italic 1.6rem Georgia,serif;
  margin-bottom:16px;
}

.how p {
  margin-top:14px;
  font-size:.9rem;
}

.screens {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}

.screens figure {
  min-width:0;
}

.screens .shot {
  border-radius:18px;
}

.screens figcaption {
  padding-top:18px;
}

.screens h3 {
  font-size:1rem;
}

.screens p {
  font-size:.8rem;
  margin-top:8px;
}

.quiet {
  background:var(--surface);
  border-block:1px solid var(--line);
}

.feature-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:38px 48px;
  margin-top:40px;
}

.feature-grid article {
  padding-top:18px;
  border-top:1px solid #355060;
}

.feature-grid h3 {
  font-size:1.02rem;
}

.feature-grid p {
  font-size:.85rem;
  margin-top:13px;
}

.test {
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:80px;
}

.test-intro p {
  margin-top:22px;
}

.test-intro .status {
  margin-bottom:20px;
}

.test-intro .eyebrow {
  margin-top:12px;
}

.steps {
  list-style:none;
  padding:0;
  margin:0;
  counter-reset:steps;
}

.steps li {
  position:relative;
  padding:0 0 30px 57px;
  counter-increment:steps;
}

.steps li:before {
  content:counter(steps,decimal-leading-zero);
  position:absolute;
  left:0;
  top:0;
  color:var(--gold);
  font:italic 1.5rem Georgia,serif;
}

.steps li+li {
  padding-top:25px;
  border-top:1px solid var(--line);
}

.steps li+li:before {
  top:25px;
}

.steps p {
  font-size:.86rem;
  margin:10px 0 14px;
}

.steps h3 {
  font-size:1.15rem;
}

.steps a {
  font-size:.86rem;
  color:var(--mint);
}

.test-note {
  grid-column:1/-1;
  background:var(--surface);
  border-left:2px solid var(--gold);
  padding:19px 24px;
  margin-top:-42px;
  font-size:.85rem;
}

.faq-layout {
  display:grid;
  grid-template-columns:.8fr 1.2fr;
  gap:70px;
}

.faq {
  border-top:1px solid var(--line);
}

details {
  border-bottom:1px solid var(--line);
  padding:21px 0;
}

summary {
  cursor:pointer;
  list-style:none;
  display:flex;
  gap:20px;
  justify-content:space-between;
  font-size:.95rem;
  font-weight:550;
}

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

summary:after {
  content:"+";
  color:var(--mint);
  font-size:1.3rem;
  line-height:1;
}

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

details p {
  font-size:.85rem;
  margin-top:17px;
}

.feedback {
  padding:38px 40px;
  border:1px solid #375754;
  border-radius:14px;
  background:linear-gradient(120deg,#163638,#112637);
  display:flex;
  justify-content:space-between;
  gap:36px;
  align-items:center;
  margin-bottom:70px;
}

.feedback h2 {
  font-size:2rem;
}

.feedback p {
  margin-top:12px;
  font-size:.88rem;
  max-width:660px;
}

.feedback .button {
  flex-shrink:0;
}

.footer {
  display:flex;
  justify-content:space-between;
  align-items:start;
  gap:30px;
  border-top:1px solid var(--line);
  padding-block:28px 35px;
  font-size:.76rem;
  color:var(--muted);
}

.footer nav {
  display:flex;
  gap:24px;
  flex-wrap:wrap;
}

.footer a {
  text-decoration:none;
}

.footer small {
  display:block;
  margin-top:8px;
  color:var(--muted);
  font-size:.7rem;
}

.zh h1,.zh h2 {
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  letter-spacing:-.035em;
}

.zh h1 {
  font-size:clamp(3.1rem,6.1vw,5rem);
  line-height:1.15;
}

.zh h2 {
  line-height:1.25;
}

.zh .art-note {
  font-family:inherit;
  font-size:1rem;
}

@media(min-width:1350px) {
  .hero {
    min-height:740px;
  }

}

@media(max-width:900px) {
  .wrap {
    width:calc(100% - 44px);
  }

  .header nav {
    gap:18px;
  }

  .hero {
    gap:24px;
    padding-block:62px;
  }

  .hero-art {
    padding-left:10px;
    padding-right:0;
  }

  .hero-art .shot {
    width:250px;
  }

  .art-note {
    left:-10px;
    bottom:65px;
    font-size:1rem;
  }

  .hero h1 {
    font-size:4rem;
  }

  .hero .intro {
    font-size:.98rem;
  }

  .test {
    gap:40px;
  }

  .faq-layout {
    gap:40px;
  }

  .section {
    padding-block:65px;
  }

  .how {
    gap:26px;
  }

  .feature-grid {
    gap:30px;
  }

  .screens {
    gap:20px;
  }

  .feedback {
    padding:30px;
    align-items:start;
    flex-direction:column;
  }

  .section-head {
    gap:25px;
  }

}

@media(max-width:620px) {
  .wrap {
    width:calc(100% - 36px);
  }

  .header {
    padding-block:18px;
    gap:12px;
  }

  .brand {
    font-size:.9rem;
    gap:9px;
  }

  .brand img {
    width:35px;
    height:35px;
    border-radius:10px;
  }

  .header nav {
    gap:13px;
    font-size:.75rem;
  }

  .header .desktop-nav {
    display:none;
  }

  .language {
    padding:5px 9px;
  }

  .hero {
    grid-template-columns:1fr;
    padding-top:40px;
    gap:38px;
  }

  .hero h1 {
    font-size:clamp(3.2rem,13vw,4.4rem);
    max-width:480px;
  }

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

  .status {
    margin-bottom:23px;
  }

  .hero-art {
    padding:4px 30px 0;
  }

  .hero-art .shot {
    width:245px;
    transform:rotate(3deg);
  }

  .art-note {
    left:0;
    bottom:68px;
    padding:10px 15px;
  }

  .facts {
    grid-template-columns:repeat(2,1fr);
    gap:22px;
  }

  .fact strong {
    font-size:1.8rem;
  }

  .section {
    padding-block:52px;
  }

  .section-head {
    display:block;
    margin-bottom:28px;
  }

  .section-head>p {
    margin-top:18px;
  }

  .how,.feature-grid {
    grid-template-columns:1fr;
    gap:26px;
  }

  .how article {
    display:grid;
    grid-template-columns:35px 1fr;
    gap:0 16px;
  }

  .how .number {
    grid-row:span 2;
  }

  .how p {
    grid-column:2;
    margin-top:10px;
  }

  .screens {
    grid-template-columns:1fr 1fr;
    gap:24px 16px;
  }

  .screens figure:first-child {
    grid-column:1/-1;
    width:75%;
    margin-inline:auto;
  }

  .screens h3 {
    font-size:.9rem;
  }

  .screens p {
    font-size:.76rem;
  }

  .test,.faq-layout {
    grid-template-columns:1fr;
    gap:30px;
  }

  .test-note {
    margin-top:0;
  }

  .steps li {
    padding-left:46px;
  }

  .feedback {
    padding:25px;
    margin-bottom:45px;
  }

  .feedback h2 {
    font-size:1.7rem;
  }

  .footer {
    flex-direction:column;
    gap:19px;
  }

  .footer nav {
    gap:20px;
  }

  .zh .hero h1 {
    font-size:clamp(2.7rem,11vw,4rem);
  }

}

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

}

@media(max-width:620px) {
  .hero-art:before {
    inset:8% 0 0;
  }

}

@media(max-width:360px) {
  .header nav a:not(.language) {
    display:none;
  }

}
.hero > div,
.hero-art {
  min-width: 0;
}
.hero-art .shot {
  max-width: 100%;
}
.hero-art::before {
  right: 0;
}
@media (min-width: 621px) and (max-width: 900px) {
  .zh .hero h1 {
    font-size: clamp(2.35rem, 4.6vw, 3.5rem);
  }
}
@media (max-width: 620px) {
  .zh .hero h1 {
    font-size: clamp(2.35rem, 10.8vw, 3.5rem);
  }
}