:root {
  --ink: #172033;
  --muted: #667085;
  --soft: #f5f7fb;
  --soft-2: #eef4f8;
  --line: #dce5ef;
  --white: #ffffff;
  --blue: #1769ff;
  --green: #12a979;
  --yellow: #f4c542;
  --navy: #0c1728;
  --shadow: 0 18px 50px rgba(16, 24, 40, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

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

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

.media-frame {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  height: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 6vw;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(220, 229, 239, 0.86);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--green));
  border-radius: 8px;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand strong {
  line-height: 1.2;
  font-size: 17px;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #42526a;
  font-size: 14px;
  font-weight: 700;
}

.desktop-nav a:hover {
  color: var(--blue);
}

.header-cta,
.btn,
.app-link,
.article-link {
  border-radius: 8px;
  font-weight: 800;
}

.header-cta {
  padding: 10px 15px;
  color: var(--white);
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.8fr);
  gap: 46px;
  align-items: center;
  padding: 72px 6vw 58px;
  background:
    radial-gradient(circle at 84% 14%, rgba(23, 105, 255, 0.12), transparent 26%),
    radial-gradient(circle at 20% 8%, rgba(18, 169, 121, 0.14), transparent 24%),
    linear-gradient(180deg, #ffffff 0%, #f5f8fc 100%);
}

.hero > * {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h1 {
  max-width: 820px;
  font-size: clamp(40px, 6vw, 72px);
}

h2 {
  font-size: clamp(28px, 4vw, 46px);
}

h3 {
  font-size: 21px;
}

.hero-copy,
.section-copy,
.page-copy {
  color: var(--muted);
  font-size: 17px;
}

.hero-copy {
  max-width: 760px;
  margin: 22px 0 0;
}

.hero-actions,
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
}

.btn.primary {
  color: var(--white);
  background: var(--blue);
}

.btn.secondary {
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
}

.hero-panel,
.product-shot,
.content-card,
.app-card,
.article-card,
.support-card,
.doc-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: 0;
  width: 100%;
  min-width: 0;
  overflow: hidden;
}

.hero-panel img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.mobile-only {
  display: none;
}

.section,
.page-section {
  padding: 76px 6vw;
}

.section:nth-of-type(even),
.page-section.alt {
  background: var(--soft);
}

.section-head {
  max-width: 820px;
  margin-bottom: 30px;
}

.section-copy,
.section-head p:not(.eyebrow) {
  margin: 14px 0 0;
  color: var(--muted);
}

.app-grid,
.article-grid,
.feature-grid,
.support-grid,
.doc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.app-card,
.article-card,
.support-card,
.doc-card,
.content-card {
  padding: 22px;
}

.app-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--green));
  border-radius: 12px;
  font-weight: 900;
}

.app-icon.image {
  overflow: hidden;
  padding: 0;
  background: transparent;
}

.app-icon.image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-card p,
.article-card p,
.support-card p,
.doc-card p,
.content-card p,
.feature-grid p {
  margin: 10px 0 0;
  color: var(--muted);
}

.app-link,
.article-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--blue);
}

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

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tag {
  padding: 6px 10px;
  color: #225;
  background: #eef4ff;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.language-grid a {
  padding: 14px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 900;
}

.language-grid span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.page-hero {
  padding: 68px 6vw 52px;
  background:
    radial-gradient(circle at 82% 18%, rgba(23, 105, 255, 0.12), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, var(--soft) 100%);
}

.page-hero h1 {
  max-width: 940px;
}

.page-copy {
  max-width: 860px;
  margin: 18px 0 0;
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 24px;
  align-items: start;
}

.list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  padding: 15px 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 920px;
}

details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 900;
}

details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.code-block {
  overflow-x: auto;
  margin: 18px 0 0;
  padding: 18px;
  color: #d6e4ff;
  background: #101828;
  border-radius: 8px;
  font-size: 14px;
}

.breadcrumb {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.site-footer {
  padding: 38px 6vw;
  color: rgba(255, 255, 255, 0.76);
  background: var(--navy);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr repeat(3, minmax(0, 0.7fr));
  gap: 24px;
}

.site-footer strong,
.site-footer a {
  color: var(--white);
}

.footer-links {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.article-body {
  max-width: 860px;
  margin: 0 auto;
}

.article-body h2 {
  margin-top: 34px;
  font-size: 28px;
}

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

.article-body a {
  color: var(--blue);
  font-weight: 800;
}

@media (max-width: 980px) {
  .hero,
  .two-col,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .app-grid,
  .article-grid,
  .feature-grid,
  .support-grid,
  .doc-grid,
  .language-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 64px;
    padding: 0 18px;
  }

  .desktop-nav,
  .header-cta,
  .brand small {
    display: none;
  }

  .hero,
  .section,
  .page-section,
  .page-hero,
  .site-footer {
    padding-right: 18px;
    padding-left: 18px;
  }

  .hero {
    padding-top: 42px;
  }

  .hero-copy,
  .hero-panel,
  .media-frame {
    width: calc(100vw - 36px);
    max-width: calc(100vw - 36px);
  }

  h1 {
    width: calc(100vw - 36px);
    max-width: calc(100vw - 36px);
    font-size: 34px;
    line-height: 1.18;
  }

  .mobile-only {
    display: block;
  }

  .app-grid,
  .article-grid,
  .feature-grid,
  .support-grid,
  .doc-grid,
  .language-grid {
    grid-template-columns: 1fr;
  }

  .phone-preview {
    max-width: 320px;
  }
}