:root {
  --cv-white: #fff;
  --cv-bg: #f6f8fb;
  --cv-surface: #f0f4f8;
  --cv-text: #101828;
  --cv-muted: #5f6c7b;
  --cv-border: #dfe5ec;
  --cv-accent: #7656f6;
  --cv-accent-hover: #6243df;
  --cv-pink: #f070bd;
  --cv-violet: #9c5cf5;
  --cv-dark: #11101a;
  --cv-radius-sm: 8px;
  --cv-radius: 12px;
  --cv-shadow: 0 18px 55px rgba(20, 38, 70, .12);
  --cv-container: 1200px;
  --cv-narrow: 760px;
  --cv-transition: 180ms ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--cv-text);
  background: var(--cv-white);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { width: calc(100% - 48px); max-width: var(--cv-container); margin-inline: auto; }

.section-title { font-size: 32px; font-weight: 800; text-align: center; margin: 0 0 40px; }
.section-title--sm { margin-top: 56px; font-size: 26px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 3996px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--cv-transition), transform var(--cv-transition), border-color var(--cv-transition), color var(--cv-transition);
}
.btn--accent { background: var(--cv-accent); color: #fff; }
.btn--accent:hover { background: var(--cv-accent-hover); }
.btn--ghost { background: #fff; border-color: var(--cv-border); color: var(--cv-text); }
.btn--ghost:hover { border-color: var(--cv-accent); color: var(--cv-accent); }
.btn--lg { padding: 14px 30px; font-size: 16px; }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  background: rgba(255, 255, 255, .88);
  border-bottom: 1px solid rgba(226, 221, 234, .86);
  box-shadow: 0 8px 28px rgba(31, 23, 51, .035);
  backdrop-filter: blur(18px);
}
.site-header__inner { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand__logo { width: auto; max-height: 40px; }
.brand__name { font-weight: 700; font-size: 18px; }

.primary-nav { display: flex; align-items: center; gap: 16px; margin-left: auto; }
.primary-nav a:not(.btn) { color: var(--cv-muted); font-size: 14px; font-weight: 500; transition: color var(--cv-transition); }
.primary-nav a:not(.btn):hover { color: var(--cv-text); }
.primary-nav a:not(.btn).active { color: var(--cv-accent); font-weight: 700; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 1px solid var(--cv-border);
  border-radius: var(--cv-radius-sm);
  background: #fff;
  cursor: pointer;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--cv-text); border-radius: 2px; }

.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 72px 0 82px;
  background: linear-gradient(180deg, #fff 0%, #faf9fc 100%);
}
.hero::before {
  content: "";
  position: absolute;
  top: -260px;
  right: -220px;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle, rgba(118, 86, 246, .11), transparent 68%);
  pointer-events: none;
}
.hero__inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; position: relative; }
.hero h1 { font-size: 46px; line-height: 1.2; margin: 0 0 18px; font-weight: 800; }
.hero__sub { font-size: 18px; color: var(--cv-muted); margin: 0 0 30px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__media { position: relative; }
.product-preview {
  max-height: 760px;
  overflow: hidden;
  background: #fff;
  border: 1px solid #ded9e6;
  border-radius: 18px;
  box-shadow: 0 22px 55px rgba(48, 34, 87, .09);
}

.download-section { position: relative; background: #f8f7fb; border-block: 1px solid #ece9f2; padding: 80px 0; }
.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.download-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
  background: #fff;
  border: 1px solid #e4e0ea;
  border-radius: 18px;
  box-shadow: 0 15px 40px rgba(42, 31, 69, .055);
  transition: transform var(--cv-transition), border-color var(--cv-transition), box-shadow var(--cv-transition);
  display: flex;
  flex-direction: column;
}
.download-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, #f070bd, #7656f6);
  opacity: .9;
}
.download-card:hover { transform: translateY(-4px); border-color: #cfc6e8; box-shadow: 0 22px 50px rgba(42, 31, 69, .1); }
.download-card h3 { margin: 0 0 10px; font-size: 22px; }
.download-card p { color: var(--cv-muted); margin: 0 0 22px; min-height: 52px; }
.download-card .btn { margin-top: auto; }

.features { padding: 80px 0; background: var(--cv-white); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  padding: 28px;
  background: var(--cv-bg);
  border: 1px solid var(--cv-border);
  border-radius: var(--cv-radius);
  transition: transform var(--cv-transition), border-color var(--cv-transition);
}
.feature-card:hover { transform: translateY(-4px); border-color: #cfc6e8; }
.feature-card__no { display: inline-block; font-size: 14px; font-weight: 800; color: var(--cv-accent); letter-spacing: 1px; }
.feature-card h3 { margin: 8px 0 10px; font-size: 19px; }
.feature-card p { color: var(--cv-muted); margin: 0; }

.steps { padding: 80px 0; background: var(--cv-bg); }
.step-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-card {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--cv-border);
  border-radius: var(--cv-radius);
  text-align: center;
}
.step-card__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cv-pink), var(--cv-accent));
  color: #fff;
  font-weight: 800;
  font-size: 18px;
}
.step-card h3 { margin: 0 0 8px; font-size: 17px; }
.step-card p { color: var(--cv-muted); margin: 0; font-size: 14px; }

.tutorial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.tutorial-card {
  display: block;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--cv-border);
  border-radius: var(--cv-radius);
  transition: transform var(--cv-transition), border-color var(--cv-transition), box-shadow var(--cv-transition);
}
.tutorial-card:hover { transform: translateY(-4px); border-color: #cfc6e8; box-shadow: var(--cv-shadow); }
.tutorial-card h3 { margin: 0 0 10px; font-size: 19px; color: var(--cv-accent); }
.tutorial-card p { color: var(--cv-muted); margin: 0; }

.faq { padding: 80px 0; background: var(--cv-white); }
.faq__list { max-width: var(--cv-narrow); margin: 0 auto; }
.faq__item { border: 1px solid var(--cv-border); border-radius: var(--cv-radius); padding: 0 22px; margin-bottom: 14px; background: var(--cv-bg); }
.faq__item summary { cursor: pointer; padding: 18px 0; font-weight: 600; list-style: none; }
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after { content: "+"; float: right; font-size: 22px; color: var(--cv-accent); line-height: 1; }
.faq__item[open] summary::after { content: "\2212"; }
.faq__item p { color: var(--cv-muted); margin: 0 0 18px; }

.site-footer { position: relative; overflow: hidden; padding: 76px 0 0; color: #c4cbd6; background: #171521; }
.site-footer__inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px 40px; padding-bottom: 48px; }
.footer__brand { max-width: 320px; }
.footer__logo { max-height: 38px; margin-bottom: 16px; }
.footer__brand p { margin: 0; font-size: 14px; line-height: 1.7; }
.footer__col { display: flex; flex-direction: column; }
.footer__title { margin: 0 0 16px; font-size: 14px; font-weight: 700; color: #fff; }
.footer__links { display: flex; flex-direction: column; gap: 2px; list-style: none; margin: 0; padding: 0; }
.footer__links li { position: relative; padding: 7px 12px 7px 28px; border-radius: 8px; transition: background var(--cv-transition); }
.footer__links li::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -4px;
  border-top: 1.5px solid #6f7787;
  border-right: 1.5px solid #6f7787;
  transform: rotate(45deg);
  transition: border-color var(--cv-transition), transform var(--cv-transition);
}
.footer__links li:hover { background: rgba(255, 255, 255, .05); }
.footer__links li:hover::before { border-color: var(--cv-accent); transform: rotate(45deg) translateX(2px); }
.footer__links a { display: inline-block; color: #c4cbd6; font-size: 14px; line-height: 1.5; transition: color var(--cv-transition), transform var(--cv-transition); }
.footer__links li:hover a { color: #fff; transform: translateX(3px); }
@media (max-width: 860px) { .site-footer__inner { grid-template-columns: 1fr 1fr; } }
.footer__copy { text-align: center; font-size: 13px; padding: 24px 0; margin: 0; border-top: 1px solid rgba(255, 255, 255, .08); color: #8b93a3; }
.friend-links { padding: 56px 0; background: var(--cv-bg); border-top: 1px solid var(--cv-border); }
.friend-links .section-title { margin-bottom: 24px; }
.friend-links__list { display: flex; flex-wrap: wrap; gap: 12px 28px; list-style: none; padding: 0; margin: 0; }
.friend-links__list a { color: var(--cv-accent); font-weight: 500; }
.friend-links__list a:hover { text-decoration: underline; }

@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 38px; }
  .download-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .step-grid { grid-template-columns: repeat(2, 1fr); }
  .tutorial-grid { grid-template-columns: 1fr; }
}

@media (max-width: 1000px) {
  .nav-toggle { display: flex; }
  .primary-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    background: #fff;
    padding: 18px 24px 24px;
    border-bottom: 1px solid var(--cv-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, .08);
    display: none;
  }
  .primary-nav.open { display: flex; }
  .primary-nav a:not(.btn) { padding: 10px 0; }
  .primary-nav .btn { margin-top: 8px; }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 30px; }
  .download-grid, .feature-grid, .step-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 26px; }
  .site-footer__inner { grid-template-columns: 1fr; }
}

.page-hero { padding: 64px 0 40px; background: linear-gradient(180deg, #fff 0%, #faf9fc 100%); border-bottom: 1px solid var(--cv-border); }
.page-hero h1 { font-size: 40px; font-weight: 800; margin: 0 0 14px; }
.page-hero p { font-size: 18px; color: var(--cv-muted); margin: 0; max-width: var(--cv-narrow); }
.page-body { padding: 56px 0 72px; }
.prose { max-width: 960px; }
.prose h2 { font-size: 26px; font-weight: 800; margin: 40px 0 18px; }
.prose h3 { font-size: 20px; font-weight: 700; margin: 28px 0 12px; }
.prose p { color: var(--cv-muted); margin: 0 0 16px; }
.prose ul, .prose ol { color: var(--cv-muted); margin: 0 0 18px; padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.prose a { color: var(--cv-accent); }
.prose a:hover { text-decoration: underline; }
.prose a.btn { color: #fff; }
.prose a.btn--ghost { color: var(--cv-text); }
.prose a.btn--ghost:hover { color: var(--cv-accent); }
.prose code { background: var(--cv-surface); border: 1px solid var(--cv-border); border-radius: 6px; padding: 2px 6px; font-size: 14px; }
.prose pre { background: var(--cv-surface); border: 1px solid var(--cv-border); border-radius: var(--cv-radius-sm); padding: 14px 18px; overflow-x: auto; margin: 0 0 18px; }
.prose pre code { background: none; border: 0; padding: 0; font-size: 14px; color: var(--cv-text); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 24px 0; }
.info-card { display: flex; flex-direction: column; padding: 26px; background: #fff; border: 1px solid var(--cv-border); border-radius: var(--cv-radius); transition: transform var(--cv-transition), border-color var(--cv-transition), box-shadow var(--cv-transition); }
.info-card:hover { transform: translateY(-4px); border-color: #cfc6e8; box-shadow: var(--cv-shadow); }
.info-card h3 { margin: 0 0 10px; font-size: 19px; }
.info-card p { color: var(--cv-muted); margin: 0 0 18px; }
.info-card .btn { margin-top: auto; align-self: flex-start; }
.step-list { counter-reset: s; list-style: none; padding: 0; margin: 20px 0; }
.step-list li { position: relative; padding: 18px 18px 18px 64px; background: var(--cv-bg); border: 1px solid var(--cv-border); border-radius: var(--cv-radius); margin-bottom: 14px; color: var(--cv-muted); }
.step-list li::before { counter-increment: s; content: counter(s); position: absolute; left: 18px; top: 18px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: linear-gradient(135deg, var(--cv-pink), var(--cv-accent)); color: #fff; font-weight: 800; }
.callout { padding: 16px 20px; background: #fff5fb; border: 1px solid #f3d6ec; border-left: 4px solid var(--cv-accent); border-radius: var(--cv-radius-sm); color: var(--cv-text); margin: 20px 0; }
.download-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 4px 0 28px; }
.download-cta .btn { min-width: 200px; justify-content: center; }

.popup-overlay { position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center; padding: 20px; background: rgba(17, 16, 26, .55); backdrop-filter: blur(4px); }
.popup-overlay.active { display: flex; }
.popup { width: 100%; max-width: 400px; background: #fff; border-radius: var(--cv-radius); box-shadow: var(--cv-shadow); padding: 32px 28px; text-align: center; animation: popupIn .22s ease; }
@keyframes popupIn { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.popup-ic { display: flex; justify-content: center; color: var(--cv-accent); margin-bottom: 14px; }
.popup h3 { margin: 0 0 10px; font-size: 22px; font-weight: 800; color: var(--cv-text); }
.popup p { margin: 0 0 22px; color: var(--cv-muted); font-size: 15px; }
.popup-btns { display: flex; gap: 12px; justify-content: center; }
.popup-btns .btn { min-width: 120px; }
@media (max-width: 960px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .card-grid { grid-template-columns: 1fr; } .page-hero h1 { font-size: 30px; } }
/* 版本发布记录 */
.release-list { display: flex; flex-direction: column; gap: 16px; margin: 20px 0 28px; }
.release { padding: 22px 24px; background: #fff; border: 1px solid var(--cv-border); border-radius: var(--cv-radius); transition: transform var(--cv-transition), border-color var(--cv-transition), box-shadow var(--cv-transition); }
.release:hover { transform: translateY(-3px); border-color: #cfc6e8; box-shadow: var(--cv-shadow); }
.release__head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-bottom: 10px; }
.release__ver { font-size: 20px; font-weight: 800; color: var(--cv-accent); letter-spacing: .3px; }
.release__date { font-size: 14px; color: var(--cv-muted); font-variant-numeric: tabular-nums; }
.release__tag { font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 3996px; }
.release__tag--stable { background: rgba(118,86,246,.12); color: var(--cv-accent); }
.release__tag--rc { background: rgba(240,112,189,.14); color: var(--cv-pink); }
.release__notes { margin: 0; padding-left: 20px; color: var(--cv-muted); }
.release__notes li { margin-bottom: 6px; }
.article-list { display: flex; flex-direction: column; gap: 10px; margin: 8px 0 24px; }
.article-item { display: flex; gap: 12px; align-items: center; padding: 14px 18px; background: #fff; border: 1px solid var(--cv-border); border-radius: var(--cv-radius); transition: border-color var(--cv-transition), box-shadow var(--cv-transition); }
.article-item:hover { border-color: #cfc6e8; box-shadow: var(--cv-shadow); }
.article-item .tag { flex: none; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 3996px; background: rgba(118,86,246,.1); color: var(--cv-accent); }
.article-item span.t { color: var(--cv-text); font-weight: 500; }