:root {
  --bg: #f4f7ff;
  --ink: #101a3b;
  --muted: #5f6a8f;
  --line: #d9e1ff;
  --brand: #4a62ff;
  --brand-2: #18b8ff;
  --surface: #ffffff;
  --radius: 18px;
  --wrap: 1200px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 90% -10%, #d7edff 0%, transparent 35%), var(--bg);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wb-wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.wb-main { padding: 28px 0 64px; }
.wb-skip { position: absolute; left: -9999px; }
.wb-skip:focus { left: 10px; top: 10px; z-index: 999; background: #111; color: #fff; padding: 8px 10px; }

.wb-announcement { background: #121d4d; color: #dce6ff; font-size: 13px; }
.wb-announcement p { margin: 0; padding: 8px 0; text-align: center; }
.wb-siteHead {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244,247,255,.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #d6e0ff;
}
.wb-siteHead__main { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.wb-brand { display: flex; align-items: center; gap: 10px; }
.wb-logo { height: 32px; width: auto; }
.wb-brand__text { font-weight: 700; color: #20306e; font-size: 14px; }
.wb-topnav { display: flex; align-items: center; gap: 4px; }
.wb-topnav a {
  padding: 8px 11px;
  border-radius: 10px;
  color: #3c4f85;
  font-size: 14px;
  font-weight: 600;
}
.wb-topnav a:hover { background: #e8eeff; color: #243b8f; }
.wb-siteHead__actions { display: flex; align-items: center; gap: 8px; }
.wb-menu { display: none; border: 1px solid #cad7ff; background: #fff; border-radius: 10px; padding: 8px; }
.wb-menu svg { width: 20px; height: 20px; }

.wb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 12px;
  border: 1px solid #cad7ff;
  background: #fff;
  color: #304882;
  font-weight: 700;
  font-size: 14px;
}
.wb-btn--primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.wb-btn--primary:hover { filter: brightness(.96); }
.hero-actions, .wb-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

.hero-shell {
  margin-top: 8px;
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(135deg, #1d2d7a, #2749c9 55%, #2896e8);
  color: #fff;
  padding: 40px;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 28px;
  align-items: center;
}
.page-shell {
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  padding: 30px;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 20px;
}
.hero-eyebrow, .section-kicker { text-transform: uppercase; letter-spacing: .08em; font-size: 12px; font-weight: 800; color: #8ac5ff; }
.page-shell .hero-eyebrow, .section-kicker { color: #4a62ff; }
.hero-shell h1, .page-shell h1 { margin: 8px 0 0; font-size: clamp(30px, 4.2vw, 56px); line-height: 1.1; }
.page-shell h1 { font-size: clamp(28px, 3.4vw, 42px); color: #1c2a60; }
.hero-lead { margin: 14px 0 0; color: #d9e4ff; max-width: 60ch; font-size: 16px; }
.page-shell .hero-lead { color: var(--muted); }
.hero-stats { margin-top: 16px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.hero-stat { border-radius: 14px; padding: 12px; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.2); }
.hero-stat strong { display: block; font-size: 24px; }
.hero-stat span { font-size: 13px; color: #d8e6ff; }
.hero-badges, .hero-tags { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.hero-badges span, .wb-tag {
  font-size: 12px;
  border-radius: 999px;
  padding: 4px 10px;
  background: rgba(255,255,255,.16);
  color: #eaf1ff;
  border: 1px solid rgba(255,255,255,.28);
}
.hero-image img { border-radius: 16px; box-shadow: 0 20px 35px rgba(10,20,60,.25); }
.proof-row { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.proof-row span { padding: 8px 12px; border-radius: 999px; background: #eef2ff; border: 1px solid #d8e1ff; color: #344572; font-size: 13px; }

.section-card {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 30px;
}
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 14px; margin-bottom: 16px; }
.section-head h2 { margin: 4px 0 0; font-size: clamp(24px, 2.8vw, 38px); line-height: 1.2; color: #17275e; }

.feature-grid, .feature-grid--4, .download-grid, .testimonials-grid, .article-feed, .wb-pn { display: grid; gap: 12px; }
.feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.feature-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.download-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.testimonials-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.article-feed { grid-template-columns: 1fr; }

.feature-card, .download-card, .testimonial-card, .mini-list-card, .faq-card {
  border: 1px solid #dce3ff;
  border-radius: 14px;
  background: linear-gradient(180deg, #ffffff, #f8faff);
  padding: 18px;
}
.feature-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  font-size: 20px;
  background: linear-gradient(135deg, #e1e7ff, #d8f1ff);
  margin-bottom: 10px;
}
.feature-card h3, .download-card h3, .testimonial-card h3 { margin: 0 0 8px; font-size: 18px; color: #1b2a62; }
.feature-card p, .download-card p, .testimonial-card p, .mini-list-card p, .wb-meta { margin: 0; color: var(--muted); font-size: 14px; }
.download-card__head { display: flex; gap: 12px; align-items: center; margin-bottom: 10px; }
.download-card__head img { width: 56px; height: 56px; object-fit: cover; border-radius: 10px; border: 1px solid #dce6ff; }

.article-card {
  border: 1px solid #dce3ff;
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  display: grid;
  grid-template-columns: 240px 1fr;
}
.article-card__img img { width: 100%; height: 100%; object-fit: cover; }
.article-card__body { padding: 16px; display: grid; gap: 8px; align-content: start; }
.article-card__body h2, .article-card__body h3 { margin: 0; font-size: 20px; line-height: 1.35; color: #1b2a62; }
.article-card__body p, .article-card__body span { margin: 0; color: var(--muted); }

.toolbar-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.toolbar-row a { padding: 6px 10px; border-radius: 999px; border: 1px solid #d5e0ff; background: #f2f6ff; color: #344572; font-size: 13px; }
.article-body { padding: 26px; }
.article-intro { border: 1px solid #d4deff; border-left: 4px solid #4a62ff; border-radius: 12px; padding: 12px; margin-bottom: 16px; background: #f4f7ff; color: #3a4c7e; }
.wb-prose, .wb-prose p, .wb-prose li, .wb-prose h1, .wb-prose h2, .wb-prose h3 { color: #1c2a60; }
.wb-prose a { color: #2849be; text-decoration: underline; }
.download-banner { margin-top: 16px; border: 1px solid #d4deff; border-radius: 14px; padding: 18px; display: grid; grid-template-columns: 1fr auto; gap: 14px; align-items: center; background: #f7f9ff; }
.wb-pn { margin-top: 14px; grid-template-columns: 1fr 1fr; }
.wb-btn--block { width: 100%; }
.wb-disabled { opacity: .56; pointer-events: none; }
.wb-pagination { margin-top: 16px; display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; }

.final-cta { text-align: center; max-width: 820px; margin: 0 auto; }
.final-cta h2 { margin: 0; font-size: clamp(28px, 3.1vw, 44px); color: #17275e; line-height: 1.2; }
.final-cta p { margin: 12px 0 0; color: var(--muted); font-size: 16px; }
.final-cta .hero-actions { justify-content: center; }

.wb-footer { margin-top: 48px; padding-top: 24px; background: #101b49; color: #e4e9ff; }
.wb-foot-cta {
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 16px;
  padding: 20px;
  background: linear-gradient(135deg, rgba(74,98,255,.35), rgba(24,184,255,.2));
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
}
.wb-foot-cta h2 { margin: 4px 0; color: #fff; }
.wb-foot-cta p, .wb-foot-cta__k { margin: 0; color: #d3ddff; }
.wb-foot-grid { margin-top: 18px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 14px; }
.wb-foot-grid h3 { margin: 0 0 8px; color: #fff; }
.wb-foot-grid p, .wb-foot-grid ul { margin: 0; padding-left: 0; list-style: none; color: #cad3ff; }
.wb-foot-grid li { margin-bottom: 7px; }
.wb-foot-bottom { margin-top: 18px; border-top: 1px solid rgba(255,255,255,.2); padding: 12px 0; }
.wb-foot-bottom__in { display: flex; justify-content: space-between; gap: 8px; color: #c4ceff; font-size: 14px; }

.wb-faqBtn { width: 100%; border: none; background: transparent; padding: 0; text-align: left; font-size: 17px; font-weight: 700; color: #223572; cursor: pointer; }
.wb-faqPanel p { margin: 10px 0 0; color: var(--muted); }
.faq-card { margin-bottom: 10px; }

@media (max-width: 1024px) {
  .wb-menu { display: inline-flex; }
  .wb-topnav {
    position: absolute;
    top: 108px;
    left: 12px;
    right: 12px;
    display: grid;
    padding: 10px;
    background: #fff;
    border: 1px solid #d6e0ff;
    border-radius: 12px;
  }
  .wb-topnav[aria-hidden="true"] { display: none; }
  .hero-shell, .page-shell, .feature-grid, .feature-grid--4, .download-grid, .testimonials-grid, .wb-foot-grid, .wb-pn, .download-banner, .article-card { grid-template-columns: 1fr; }
  .section-head { display: grid; }
}
@media (max-width: 640px) {
  .wb-btn { width: 100%; }
  .hero-shell, .page-shell, .section-card, .wb-foot-cta, .article-body { padding: 18px; }
  .hero-stats { grid-template-columns: 1fr; }
  .wb-siteHead__actions .wb-btn { display: none; }
}