:root {
  --wb-primary: #007AFF;
  --wb-primary-dark: #0063d1;
  --wb-bg: #FFFFFF;
  --wb-ink: #333333;
  --wb-muted: #666666;
  --wb-line: #e8eef5;
  --wb-wrap: 1200px;
  --wb-topbar-h: 72px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--wb-ink);
  background: var(--wb-bg);
  line-height: 1.7;
  padding-top: var(--wb-topbar-h);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wb-wrap { width: 100%; max-width: var(--wb-wrap); margin: 0 auto; padding: 0 20px; }
.wb-main { padding: 28px 0 56px; }
.wb-skip { position: absolute; left: -9999px; }
.wb-skip:focus { left: 10px; top: 10px; z-index: 999; background: #111; color: #fff; padding: 8px 10px; }

.wb-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid var(--wb-line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
}
.wb-topbar__inner { height: var(--wb-topbar-h); display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.wb-logo { width: auto; height: 36px; }
.wb-topnav { display: flex; align-items: center; gap: 8px; }
.wb-topnav a { color: #4f5f71; font-size: 14px; padding: 8px 12px; border-radius: 4px; }
.wb-topnav a:hover { color: var(--wb-primary); background: #f2f8ff; }
.wb-topbar__right { display: flex; align-items: center; gap: 10px; }
.wb-menu { display: none; border: 1px solid var(--wb-line); background: #fff; border-radius: 4px; padding: 8px; }
.wb-menu svg { width: 20px; height: 20px; }

.wb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 10px 16px;
  border-radius: 4px;
  border: 1px solid #d8e3ef;
  background: #fff;
  color: #46566b;
  font-size: 14px;
  font-weight: 600;
}
.wb-btn--primary { border-color: var(--wb-primary); background: var(--wb-primary); color: #fff; }
.wb-btn--primary:hover { background: var(--wb-primary-dark); border-color: var(--wb-primary-dark); }
.hero-actions, .wb-actions { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }

.hero-shell, .page-shell {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 22px;
  align-items: center;
  padding: 44px 40px;
  border: 1px solid var(--wb-line);
  border-radius: 8px;
  background: linear-gradient(140deg, rgba(255,255,255,.95), rgba(244,249,255,.85));
  box-shadow: 0 12px 34px rgba(0, 122, 255, 0.08);
}
.hero-eyebrow, .section-kicker { color: var(--wb-primary); font-size: 13px; font-weight: 700; letter-spacing: .02em; }
.hero-shell h1, .page-shell h1 { margin: 8px 0 0; font-size: clamp(30px, 4vw, 52px); line-height: 1.15; }
.hero-lead { margin: 16px 0 0; max-width: 56ch; color: var(--wb-muted); font-size: 17px; }
.hero-stats { margin-top: 18px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.hero-stat { border: 1px solid var(--wb-line); border-radius: 8px; padding: 12px; background: #fff; }
.hero-stat strong { display: block; color: var(--wb-primary); font-size: 24px; line-height: 1.2; }
.hero-stat span { font-size: 13px; color: var(--wb-muted); }
.hero-badges { margin-top: 16px; display: flex; gap: 8px; flex-wrap: wrap; }
.hero-badges span, .wb-tag { border: 1px solid #dce8f8; border-radius: 4px; padding: 4px 8px; background: #f6faff; color: #4f5f71; font-size: 12px; }
.hero-image img { width: 100%; border-radius: 8px; border: 1px solid #dce8f8; }

.section-card {
  margin-top: 48px;
  padding: 36px;
  border: 1px solid var(--wb-line);
  border-radius: 8px;
  background: #fff;
}
.section-head { margin-bottom: 18px; display: flex; justify-content: space-between; align-items: end; gap: 12px; }
.section-head h2 { margin: 6px 0 0; font-size: clamp(24px, 3vw, 36px); line-height: 1.2; }
.feature-grid, .download-grid, .article-feed, .testimonials-grid, .wb-pn { display: grid; gap: 14px; }
.feature-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.download-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.testimonials-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }

.feature-card, .download-card, .article-card, .testimonial-card, .faq-card, .mini-list-card {
  border: 1px solid var(--wb-line);
  border-radius: 8px;
  background: linear-gradient(140deg, rgba(255,255,255,.98), rgba(247,251,255,.88));
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.06);
}
.feature-card, .download-card, .testimonial-card, .faq-card, .mini-list-card { padding: 18px; }
.feature-icon { width: 42px; height: 42px; border-radius: 8px; display: grid; place-items: center; font-size: 20px; background: #f1f8ff; margin-bottom: 10px; }
.feature-card h3, .download-card h3, .testimonial-card h3 { margin: 0 0 8px; font-size: 18px; }
.feature-card p, .download-card p, .testimonial-card p { margin: 0; color: var(--wb-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; border-radius: 8px; object-fit: cover; border: 1px solid #dce8f8; }

.article-feed { grid-template-columns: 1fr; }
.article-card { display: grid; grid-template-columns: 220px 1fr; overflow: hidden; }
.article-card__img img { width: 100%; height: 100%; object-fit: cover; }
.article-card__body { padding: 16px; display: grid; gap: 8px; }
.article-card__body h2, .article-card__body h3 { margin: 0; font-size: 22px; line-height: 1.3; }
.article-card__body p, .wb-meta { margin: 0; color: var(--wb-muted); font-size: 14px; }

.toolbar-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.toolbar-row a { padding: 6px 12px; border: 1px solid #dce8f8; border-radius: 4px; background: #f6faff; font-size: 13px; }
.article-body { padding: 28px; }
.article-intro { margin-bottom: 16px; padding: 12px; border: 1px solid #cfe3fb; border-left: 4px solid var(--wb-primary); border-radius: 8px; background: #f3f9ff; color: #52657d; }
.download-banner { margin-top: 20px; padding: 20px; border: 1px solid #cfe3fb; border-radius: 8px; background: #f3f9ff; display: grid; grid-template-columns: 1fr auto; gap: 14px; align-items: center; }
.wb-pn { margin-top: 14px; grid-template-columns: 1fr 1fr; }
.wb-disabled { opacity: .56; pointer-events: none; }
.wb-btn--block { width: 100%; }
.wb-pagination { margin-top: 18px; display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; }

.wb-footer { margin-top: 56px; padding-top: 32px; background: #f7fbff; border-top: 1px solid var(--wb-line); }
.wb-foot-cta { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 16px; padding: 20px; border-radius: 8px; border: 1px solid #dbe9f8; background: linear-gradient(140deg, rgba(255,255,255,.95), rgba(241,248,255,.88)); }
.wb-foot-cta h2 { margin: 6px 0; font-size: 24px; }
.wb-foot-cta p, .wb-foot-cta__k { margin: 0; color: var(--wb-muted); }
.wb-foot-grid { margin-top: 24px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 14px; }
.wb-foot-grid h3 { margin: 0 0 8px; font-size: 16px; }
.wb-foot-grid p, .wb-foot-grid ul { margin: 0; color: #5f6f82; padding-left: 0; list-style: none; }
.wb-foot-grid li { margin-bottom: 8px; }
.wb-foot-bottom { margin-top: 24px; border-top: 1px solid var(--wb-line); padding: 14px 0; }
.wb-foot-bottom__in { display: flex; justify-content: space-between; gap: 10px; color: #66788e; font-size: 14px; }

.wb-faqBtn { width: 100%; border: none; background: transparent; text-align: left; padding: 0; font-size: 17px; color: #36495f; font-weight: 700; cursor: pointer; }
.wb-faqPanel p { margin: 10px 0 0; color: var(--wb-muted); }
.faq-card { margin-bottom: 10px; }

@media (max-width: 1024px) {
  :root { --wb-topbar-h: 64px; }
  .wb-menu { display: inline-flex; }
  .wb-topnav {
    position: absolute;
    top: calc(var(--wb-topbar-h) - 1px);
    left: 12px;
    right: 12px;
    padding: 10px;
    display: grid;
    border: 1px solid var(--wb-line);
    border-radius: 8px;
    background: #fff;
  }
  .wb-topnav[aria-hidden="true"] { display: none; }
  .hero-shell, .page-shell, .feature-grid, .download-grid, .testimonials-grid, .wb-foot-grid, .wb-pn, .download-banner, .article-card { grid-template-columns: 1fr; }
  .section-head { display: grid; grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .wb-btn { width: 100%; }
  .hero-shell, .page-shell, .section-card, .wb-foot-cta { padding: 18px; }
  .hero-stats { grid-template-columns: 1fr; }
}