:root {
  color-scheme: light;
  --ink: #151719;
  --muted: #5b636d;
  --line: #d9dde2;
  --paper: #f6f4ef;
  --panel: #ffffff;
  --accent: #0d6b63;
  --accent-ink: #ffffff;
  --warm: #d8a24d;
  --blue: #496b91;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
}

.cjk {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans", "Noto Sans CJK SC", sans-serif;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px clamp(20px, 4vw, 64px);
  border-bottom: 1px solid rgba(21, 23, 25, 0.12);
  background: rgba(246, 244, 239, 0.92);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 760;
  text-decoration: none;
  white-space: nowrap;
}

.brand img,
.site-header img {
  border-radius: 8px;
}

nav,
.language-switcher {
  display: flex;
  align-items: center;
  gap: 12px;
}

nav a,
.language-switcher a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.language-switcher a {
  padding: 4px 7px;
  border: 1px solid transparent;
  border-radius: 8px;
}

.language-switcher a[aria-current="page"] {
  border-color: var(--line);
  color: var(--ink);
  background: var(--panel);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.8fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100svh - 72px);
  padding: clamp(48px, 7vw, 92px) clamp(20px, 5vw, 76px) 44px;
  overflow: hidden;
}

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

.kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(44px, 7vw, 88px);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.hero-body,
.studio-hero p,
.product-band p,
.split p {
  max-width: 690px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 20px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: 750;
  text-decoration: none;
}

.button.primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.62);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.badges li {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  color: #30363d;
  font-size: 14px;
  font-weight: 700;
}

.phone-stage {
  position: relative;
  min-height: 620px;
}

.phone {
  position: absolute;
  width: min(48vw, 292px);
  height: auto;
  border: 1px solid rgba(21, 23, 25, 0.12);
  border-radius: 28px;
  box-shadow: 0 24px 64px rgba(21, 23, 25, 0.22);
}

.phone.main {
  left: 50%;
  top: 50%;
  z-index: 3;
  transform: translate(-50%, -50%) rotate(-2deg);
}

.phone.side {
  width: min(39vw, 238px);
  opacity: 0.9;
}

.phone.side.top {
  left: 2%;
  top: 0;
  transform: rotate(8deg);
}

.phone.side.bottom {
  right: 0;
  bottom: 0;
  transform: rotate(-8deg);
}

.section {
  padding: clamp(52px, 7vw, 92px) clamp(20px, 5vw, 76px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature,
details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.feature {
  min-height: 190px;
  padding: 22px;
}

.feature p,
details p {
  color: var(--muted);
}

.workflow {
  background: #eaf0ee;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  min-height: 150px;
  padding: 22px;
  border: 1px solid rgba(13, 107, 99, 0.22);
  border-radius: 8px;
  background: var(--panel);
  font-size: 18px;
  font-weight: 720;
}

.steps li::before {
  display: block;
  margin-bottom: 18px;
  color: var(--warm);
  font-size: 34px;
  font-weight: 850;
  content: counter(step, decimal-leading-zero);
}

.split,
.product-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 330px);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}

.split img,
.product-band img {
  width: min(100%, 300px);
  height: auto;
  justify-self: center;
  border: 1px solid rgba(21, 23, 25, 0.12);
  border-radius: 28px;
  box-shadow: 0 20px 54px rgba(21, 23, 25, 0.2);
}

.resources {
  background: #f2f5f3;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.resource-card {
  display: block;
  min-height: 230px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  text-decoration: none;
}

.resource-card span {
  display: block;
  margin-bottom: 16px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.resource-card p,
.article-body p {
  color: var(--muted);
}

.article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(48px, 7vw, 92px) clamp(20px, 5vw, 76px);
}

.article-copy {
  max-width: 820px;
}

.article-image {
  width: min(100%, 280px);
  height: auto;
  justify-self: center;
  border: 1px solid rgba(21, 23, 25, 0.12);
  border-radius: 28px;
  box-shadow: 0 20px 54px rgba(21, 23, 25, 0.2);
}

.article-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  background: #ffffff;
}

.article-body section {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.faq {
  max-width: 980px;
}

details {
  margin-bottom: 12px;
  padding: 20px 22px;
}

summary {
  cursor: pointer;
  font-size: 18px;
  font-weight: 780;
}

summary + p {
  margin: 14px 0 0;
}

.studio-hero {
  padding: clamp(72px, 12vw, 152px) clamp(20px, 5vw, 76px) clamp(44px, 7vw, 88px);
}

.studio-hero h1 {
  max-width: 820px;
}

.product-band {
  background: #eef1f4;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(20px, 5vw, 76px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer p {
  margin: 0;
}

.footer a {
  font-weight: 700;
  text-decoration: none;
}

@media (max-width: 980px) {
  .hero,
  .split,
  .product-band,
  .article {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .phone-stage {
    min-height: 560px;
  }

  .phone {
    width: min(60vw, 280px);
  }

  .phone.side {
    width: min(46vw, 220px);
  }

  .feature-grid,
  .resource-grid,
  .article-body,
  .steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  nav,
  .language-switcher {
    flex-wrap: wrap;
  }

  h1 {
    font-size: 42px;
  }

  .hero {
    padding-top: 36px;
  }

  .phone-stage {
    min-height: 430px;
  }

  .phone {
    width: min(74vw, 240px);
    border-radius: 22px;
  }

  .phone.side {
    width: min(52vw, 170px);
  }

  .feature-grid,
  .resource-grid,
  .article-body,
  .steps {
    grid-template-columns: 1fr;
  }

  .feature,
  .steps li {
    min-height: auto;
  }
}