:root {
  color-scheme: light;
  --ink: #132b28;
  --muted: #5a6c69;
  --primary: #0e756b;
  --primary-strong: #095c54;
  --primary-soft: #dff3ee;
  --accent: #f2b84b;
  --surface: #ffffff;
  --surface-soft: #f4f8f7;
  --line: #d9e5e2;
  --shadow: 0 24px 70px rgba(20, 62, 56, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --content: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 5%, rgba(223, 243, 238, 0.95), transparent 28rem),
    linear-gradient(180deg, #fbfdfc 0%, #f3f8f7 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Noto Sans SC", sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
}

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

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

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 10px;
  color: white;
  background: var(--primary-strong);
  transition: top 160ms ease;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(217, 229, 226, 0.75);
  background: rgba(251, 253, 252, 0.88);
  backdrop-filter: blur(18px);
}

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

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 760;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand img {
  width: 42px;
  height: 42px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-link,
.language-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
}

.nav-link:hover,
.nav-link:focus-visible,
.language-button:hover,
.language-button:focus-visible {
  color: var(--primary-strong);
  background: var(--primary-soft);
  outline: none;
}

.language-button {
  border-color: var(--line);
  background: var(--surface);
}

.hero {
  min-height: 690px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: clamp(44px, 7vw, 92px);
  padding-block: 86px 96px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 0.85rem;
  font-weight: 760;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  content: "";
}

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

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(3rem, 6.2vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.hero-copy {
  max-width: 640px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 19px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  font-weight: 750;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(20, 62, 56, 0.12);
  outline: none;
}

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

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--primary-strong);
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 26px 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.92rem;
  list-style: none;
}

.trust-list li::before {
  margin-right: 7px;
  color: var(--primary);
  content: "✓";
  font-weight: 900;
}

.product-preview {
  position: relative;
  padding: 24px;
  border: 1px solid rgba(217, 229, 226, 0.9);
  border-radius: 40px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.product-preview::before {
  position: absolute;
  inset: auto -24px -30px auto;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: rgba(242, 184, 75, 0.22);
  filter: blur(2px);
  content: "";
  z-index: -1;
}

.preview-window {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface-soft);
}

.preview-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px 14px;
}

.preview-title {
  font-size: 1.05rem;
  font-weight: 800;
}

.preview-search {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--primary);
  background: var(--primary-soft);
}

.preview-search::before {
  width: 12px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 50%;
  content: "";
}

.preview-search::after {
  width: 7px;
  height: 2px;
  margin-left: -9px;
  margin-top: 13px;
  background: currentColor;
  content: "";
  transform: rotate(45deg);
}

.preview-collection {
  margin: 0 16px 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
}

.collection-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.collection-head strong {
  font-size: 0.96rem;
}

.count-pill {
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 0.74rem;
  font-weight: 800;
}

.file-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid #edf2f1;
}

.file-thumb {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 0.72rem;
  font-weight: 850;
}

.file-meta strong,
.file-meta small {
  overflow: hidden;
  display: block;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-meta strong {
  font-size: 0.88rem;
}

.file-meta small {
  color: var(--muted);
  font-size: 0.74rem;
}

.section {
  padding-block: 96px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 42px;
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.section-heading p {
  color: var(--muted);
  font-size: 1.05rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 230px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.88);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 38px;
  border-radius: 15px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-weight: 850;
}

.feature-card h3 {
  margin-bottom: 8px;
  font-size: 1.16rem;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 0;
  counter-reset: step;
  list-style: none;
}

.steps li {
  padding: 26px;
  border-top: 3px solid var(--primary);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  background: rgba(255, 255, 255, 0.64);
  counter-increment: step;
}

.steps li::before {
  display: block;
  margin-bottom: 18px;
  color: var(--primary);
  content: "0" counter(step);
  font-weight: 850;
}

.steps strong {
  display: block;
  margin-bottom: 7px;
  font-size: 1.08rem;
}

.steps span {
  color: var(--muted);
}

.privacy-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  padding: clamp(28px, 5vw, 54px);
  border-radius: 32px;
  color: white;
  background: var(--primary-strong);
  box-shadow: 0 24px 60px rgba(9, 92, 84, 0.22);
}

.privacy-panel h2 {
  margin-bottom: 12px;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.privacy-panel p {
  max-width: 690px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
}

.privacy-panel .button {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--primary-strong);
}

.site-footer {
  padding-block: 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--primary);
}

.page-hero {
  padding-block: 70px 38px;
}

.page-hero h1 {
  max-width: 850px;
  font-size: clamp(2.7rem, 6vw, 4.6rem);
}

.page-hero p {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.08rem;
}

.legal-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  align-items: start;
  gap: 50px;
  padding-bottom: 100px;
}

.legal-aside {
  position: sticky;
  top: 100px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.75);
  font-size: 0.88rem;
}

.legal-aside strong {
  display: block;
  margin-bottom: 7px;
  color: var(--ink);
}

.legal-content {
  padding: clamp(28px, 5vw, 58px);
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--surface);
  box-shadow: 0 22px 55px rgba(20, 62, 56, 0.08);
}

.legal-content section + section {
  margin-top: 38px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.legal-content h2 {
  margin-bottom: 12px;
  font-size: 1.35rem;
}

.legal-content h3 {
  margin: 24px 0 8px;
  font-size: 1.02rem;
}

.legal-content p,
.legal-content li {
  color: #425754;
}

.legal-content ul {
  padding-left: 1.25rem;
}

.notice {
  margin: 24px 0;
  padding: 17px 19px;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #664b15;
  background: #fff7e6;
}

.placeholder {
  padding: 2px 6px;
  border: 1px dashed #c0604b;
  border-radius: 6px;
  color: #8a3526;
  background: #fff0ed;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-weight: 700;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding-bottom: 100px;
}

.support-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.88);
}

.support-card h2 {
  margin-bottom: 9px;
  font-size: 1.25rem;
}

.support-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.support-card.wide {
  grid-column: 1 / -1;
}

[data-copy="zh"] {
  display: none;
}

html[data-language="zh"] [data-copy="en"] {
  display: none;
}

html[data-language="zh"] [data-copy="zh"] {
  display: revert;
}

@media (max-width: 860px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-block: 64px 76px;
  }

  .product-preview {
    width: min(100%, 520px);
    margin-inline: auto;
  }

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

  .privacy-panel,
  .legal-layout {
    grid-template-columns: 1fr;
  }

  .legal-aside {
    position: static;
  }
}

@media (max-width: 640px) {
  .header-inner,
  .container {
    width: min(calc(100% - 28px), var(--content));
  }

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

  .brand span {
    display: none;
  }

  .nav-link {
    display: none;
  }

  .hero {
    gap: 44px;
    padding-top: 48px;
  }

  h1 {
    font-size: clamp(2.8rem, 16vw, 4.2rem);
  }

  .product-preview {
    padding: 12px;
    border-radius: 30px;
  }

  .section {
    padding-block: 72px;
  }

  .feature-grid,
  .steps,
  .support-grid {
    grid-template-columns: 1fr;
  }

  .support-card.wide {
    grid-column: auto;
  }

  .privacy-panel {
    align-items: start;
  }

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

  .legal-content {
    padding: 24px 20px;
    border-radius: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}