:root {
  color-scheme: light;
  --ink: #25212d;
  --ink-soft: #5c5666;
  --ink-faint: #6f6879;
  --cream: #fffaf2;
  --cream-deep: #f8efe4;
  --lilac: #eee8f8;
  --lilac-strong: #cbbce8;
  --violet: #5f4d87;
  --blue: #dcecf4;
  --blue-strong: #466c84;
  --line: rgba(67, 57, 83, 0.16);
  --line-strong: rgba(67, 57, 83, 0.28);
  --page: min(76rem, calc(100vw - 5rem));
  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 0;
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

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

.page-width {
  width: var(--page);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: 999px;
  background: var(--ink);
  color: #ffffff;
  font-size: 0.82rem;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 180ms ease;
}

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

:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 4px;
}

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid rgba(67, 57, 83, 0.1);
  background: rgba(255, 250, 242, 0.9);
  -webkit-backdrop-filter: blur(16px) saturate(120%);
  backdrop-filter: blur(16px) saturate(120%);
}

.header-inner,
.site-header > nav {
  display: flex;
  width: var(--page);
  min-height: 4.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-inline: auto;
}

.back-link,
.brand,
.site-header > nav a {
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.035em;
  text-decoration-color: rgba(95, 77, 135, 0.3);
  text-underline-offset: 0.28rem;
}

.back-link,
.site-header > nav a:first-child {
  color: var(--ink-soft);
}

.brand,
.site-header > nav a:last-child {
  color: var(--violet);
}

.product-hero {
  position: relative;
  padding: clamp(4rem, 8vw, 7rem) 0 clamp(5.5rem, 10vw, 9rem);
  overflow: hidden;
}

.product-hero::before {
  position: absolute;
  z-index: -1;
  top: -18rem;
  right: -13rem;
  width: 44rem;
  height: 44rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(203, 188, 232, 0.6) 0, rgba(220, 236, 244, 0.3) 46%, transparent 72%);
  content: "";
}

.product-hero__grid {
  display: grid;
  grid-template-columns: minmax(19rem, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.product-hero__copy {
  position: relative;
  z-index: 2;
}

.status-pill {
  width: fit-content;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(95, 77, 135, 0.26);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.48);
  padding: 0.42rem 0.82rem;
  color: var(--violet);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.eyebrow,
.section-label {
  color: var(--blue-strong);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.15em;
  line-height: 1.5;
  text-transform: uppercase;
}

.product-hero h1 {
  margin-top: 1.25rem;
  font-weight: 530;
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.product-hero h1 span {
  display: block;
}

.product-hero h1 span[lang="zh-CN"] {
  font-size: clamp(3.5rem, 7vw, 6.4rem);
}

.product-hero h1 span[lang="en"] {
  margin-top: 0.25em;
  color: var(--violet);
  font-size: clamp(2rem, 4vw, 3.65rem);
  font-weight: 430;
  letter-spacing: -0.045em;
}

.product-hero__tagline {
  margin-top: clamp(1.75rem, 3vw, 2.75rem);
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  font-weight: 570;
  letter-spacing: -0.02em;
  line-height: 1.45;
}

.product-hero__intro {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.96rem;
  line-height: 1.85;
}

.product-hero__intro p[lang="en"] {
  color: var(--ink-faint);
  font-size: 0.86rem;
}

.product-hero__visual {
  position: relative;
  min-width: 0;
  padding: 2rem 0 3.5rem;
}

.product-hero__landscape {
  display: block;
  width: 100%;
  border: 1px solid rgba(67, 57, 83, 0.12);
  border-radius: 2rem;
  box-shadow: 0 2rem 6rem rgba(62, 53, 77, 0.16);
}

.product-hero__portrait {
  position: absolute;
  right: -1.25rem;
  bottom: 0;
  width: 27%;
  border: 0.4rem solid rgba(255, 250, 242, 0.94);
  border-radius: 1.65rem;
  box-shadow: 0 1.25rem 3.5rem rgba(62, 53, 77, 0.22);
}

.product-section {
  padding: clamp(4.75rem, 8vw, 7.5rem) 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 42rem;
}

.section-heading h2,
.product-contact h2 {
  margin-top: 1rem;
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 510;
  letter-spacing: -0.055em;
  line-height: 1.08;
}

.section-heading > p:last-child {
  margin-top: 1rem;
  color: var(--ink-soft);
  font-size: 1rem;
}

.capabilities {
  background: rgba(255, 255, 255, 0.36);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(2.75rem, 5vw, 4.75rem);
  border-top: 1px solid var(--line-strong);
}

.capability-item {
  min-width: 0;
  padding: 2rem clamp(1.25rem, 2.4vw, 2.25rem) 0.5rem;
  border-left: 1px solid var(--line);
}

.capability-item:first-child {
  border-left: 0;
}

.capability-number {
  color: var(--violet);
  font-size: 0.67rem;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.capability-item h3 {
  margin-top: 2.5rem;
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  font-weight: 570;
  letter-spacing: -0.03em;
}

.capability-item > p:last-child {
  margin-top: 1rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.8;
}

.privacy-overview {
  background: linear-gradient(135deg, rgba(238, 232, 248, 0.75), rgba(220, 236, 244, 0.62));
}

.privacy-overview__grid {
  display: grid;
  grid-template-columns: minmax(15rem, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(3rem, 8vw, 8rem);
}

.privacy-list {
  display: grid;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.privacy-list li {
  display: grid;
  grid-template-columns: minmax(12rem, 0.9fr) minmax(0, 1.1fr);
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.privacy-list strong {
  font-size: 0.96rem;
  font-weight: 650;
}

.privacy-list span {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.product-contact {
  background: #2c2735;
  color: #ffffff;
}

.product-contact .section-label {
  color: #bcd5e3;
}

.product-contact__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem 4rem;
}

.product-contact__inner > a {
  color: #ffffff;
  font-size: clamp(1.3rem, 2.7vw, 2.6rem);
  font-weight: 430;
  letter-spacing: -0.045em;
  overflow-wrap: anywhere;
  text-decoration-color: rgba(255, 255, 255, 0.32);
  text-underline-offset: 0.22em;
}

main.legal-page {
  background:
    linear-gradient(180deg, rgba(238, 232, 248, 0.5), transparent 26rem),
    var(--cream);
}

.legal-hero,
.legal-intro {
  padding: clamp(4.5rem, 9vw, 7.5rem) 0 clamp(3rem, 5vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}

article.legal-page {
  width: min(52rem, calc(100vw - 5rem));
  margin-inline: auto;
  padding-bottom: clamp(4.5rem, 8vw, 7rem);
}

article.legal-page .legal-intro {
  margin-bottom: 0;
}

.legal-hero h1,
.legal-intro h1 {
  margin-top: 1.2rem;
  font-size: clamp(2.6rem, 5.5vw, 4.8rem);
  font-weight: 520;
  letter-spacing: -0.06em;
  line-height: 1.05;
}

.legal-meta,
.legal-intro > p:not(.eyebrow) {
  margin-top: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.legal-content {
  width: min(52rem, var(--page));
  padding: clamp(3.5rem, 7vw, 6rem) 0 clamp(5rem, 9vw, 8rem);
}

.legal-content section,
article.legal-page > section {
  padding: 2.25rem 0;
  border-bottom: 1px solid var(--line);
}

.legal-content section:first-child,
article.legal-page > section:first-of-type {
  padding-top: 0;
}

.legal-content h2,
article.legal-page > section h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.45;
}

.legal-content p,
article.legal-page > section p {
  color: #484250;
  font-size: 1rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.legal-content p + p,
article.legal-page > section p + p {
  margin-top: 0.9rem;
}

.legal-content a,
article.legal-page a {
  color: var(--violet);
  font-weight: 600;
  text-underline-offset: 0.25rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--cream-deep);
}

.footer-inner,
.site-footer > nav {
  display: flex;
  width: var(--page);
  min-height: 8rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2.5rem;
  margin-inline: auto;
  color: var(--ink-faint);
  font-size: 0.72rem;
}

.footer-inner nav,
.site-footer > nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.4rem;
}

.footer-inner nav a,
.site-footer > nav a {
  text-underline-offset: 0.24rem;
}

.site-footer > p {
  width: var(--page);
  margin: -2.5rem auto 0;
  padding-bottom: 2rem;
  color: var(--ink-faint);
  font-size: 0.72rem;
}

@media (max-width: 900px) {
  .product-hero__grid,
  .privacy-overview__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .product-hero__grid {
    gap: 2.75rem;
  }

  .product-hero__copy {
    max-width: 42rem;
  }

  .product-hero__visual {
    width: min(100%, 47rem);
    margin-inline: auto;
  }

  .capability-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .capability-item:nth-child(3) {
    border-left: 0;
  }

  .capability-item:nth-child(n + 3) {
    margin-top: 2rem;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  :root {
    --page: calc(100vw - 2.5rem);
  }

  .header-inner,
  .site-header > nav {
    min-height: 4.25rem;
    gap: 1rem;
  }

  .back-link,
  .brand,
  .site-header > nav a {
    font-size: 0.68rem;
  }

  .product-hero {
    padding-top: 3.5rem;
  }

  .product-hero h1 span[lang="zh-CN"] {
    font-size: clamp(3.1rem, 17vw, 4.5rem);
  }

  .product-hero h1 span[lang="en"] {
    font-size: clamp(1.85rem, 10vw, 2.75rem);
  }

  .product-hero__visual {
    display: grid;
    justify-items: center;
    padding: 0 0 1rem;
  }

  .product-hero__landscape {
    border-radius: 1.25rem;
  }

  .product-hero__portrait {
    position: relative;
    right: auto;
    bottom: auto;
    width: min(54%, 12rem);
    margin-top: -2.5rem;
    border-width: 0.3rem;
    border-radius: 1.25rem;
  }

  .capability-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .capability-item,
  .capability-item:nth-child(3) {
    margin-top: 0;
    padding: 1.5rem 0;
    border-top: 0;
    border-bottom: 1px solid var(--line);
    border-left: 0;
  }

  .capability-item h3 {
    margin-top: 1rem;
  }

  .privacy-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.45rem;
  }

  .product-contact__inner,
  .footer-inner,
  .site-footer > nav {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }

  .product-contact__inner > a {
    width: 100%;
  }

  article.legal-page {
    width: var(--page);
  }

  .legal-hero,
  .legal-intro {
    padding-top: 3.75rem;
  }

  .site-footer > p {
    margin-top: -1.25rem;
  }
}

@media (max-width: 390px) {
  :root {
    --page: calc(100vw - 2rem);
  }

  .header-inner,
  .site-header > nav {
    min-height: 4.75rem;
    gap: 0.75rem;
  }

  .back-link,
  .brand,
  .site-header > nav a {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    font-size: 0.75rem;
  }

  .product-hero__tagline {
    font-size: 1.14rem;
  }

  .legal-hero h1,
  .legal-intro h1 {
    font-size: clamp(2.25rem, 12vw, 3rem);
  }

  .legal-content p,
  article.legal-page > section p {
    font-size: 0.96rem;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}