:root {
  --blue: #1677ff;
  --cyan: #22d3ee;
  --violet: #7c6cff;
  --ink: #0b1736;
  --muted: #63718c;
  --line: #e5ecf8;
  --pale: #f5f8ff;
  --card: #fff;
  --shadow: 0 22px 60px rgba(28, 75, 150, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.7;
  background: #fff;
}
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: auto; }
button, input { font: inherit; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(222, 232, 249, .9);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(18px);
}
.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.logo { display: flex; align-items: center; gap: 11px; color: var(--blue); font-size: 22px; font-weight: 900; }
.logo-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 12px 28px rgba(22, 119, 255, .28);
}
.nav-links { display: flex; align-items: center; gap: 24px; color: #52627d; font-size: 14px; }
.nav-links a:hover, .text-link:hover { color: var(--blue); }
.nav-actions { display: flex; gap: 10px; }
.btn {
  display: inline-flex;
  min-height: 46px;
  padding: 0 23px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 800;
  transition: .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--blue), #4f8fff); box-shadow: 0 14px 30px rgba(22, 119, 255, .25); }
.btn-light { color: var(--blue); border-color: #cfe0ff; background: #fff; }
.btn-white { color: var(--blue); background: #fff; box-shadow: 0 15px 34px rgba(4, 33, 94, .18); }
.hero {
  position: relative;
  overflow: hidden;
  padding: 86px 0 76px;
  background:
    radial-gradient(circle at 10% 15%, rgba(34, 211, 238, .13), transparent 25%),
    radial-gradient(circle at 88% 8%, rgba(124, 108, 255, .15), transparent 28%),
    linear-gradient(180deg, #f4f8ff, #fff);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 28px 5% auto;
  height: 470px;
  border: 1px solid rgba(255, 255, 255, .9);
  border-radius: 44px;
  background: rgba(255,255,255,.42);
  box-shadow: inset 0 0 80px rgba(22,119,255,.05);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 17px;
  padding: 7px 13px;
  color: var(--blue);
  border: 1px solid #d8e6ff;
  border-radius: 999px;
  background: rgba(255,255,255,.8);
  font-size: 13px;
  font-weight: 800;
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: #29d391; box-shadow: 0 0 0 5px rgba(41,211,145,.13); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 18px; font-size: clamp(42px, 6vw, 68px); line-height: 1.08; letter-spacing: -.055em; }
.gradient { color: transparent; background: linear-gradient(105deg, var(--blue), var(--violet), #00b9d7); background-clip: text; }
.lead { max-width: 610px; margin-bottom: 27px; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-bottom: 18px; }
.system-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; color: #6d7b92; list-style: none; font-size: 13px; }
.system-list li { padding: 6px 10px; border: 1px solid #e1e9f6; border-radius: 8px; background: rgba(255,255,255,.74); }
.meeting-ui {
  position: relative;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.9);
  border-radius: 30px;
  background: rgba(255,255,255,.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}
.meeting-ui > img { min-height: 350px; object-fit: cover; border-radius: 22px; background: #eaf1ff; }
.summary-float {
  position: absolute;
  left: -30px;
  bottom: 28px;
  width: 270px;
  padding: 18px;
  border: 1px solid #dce7f8;
  border-radius: 20px;
  background: rgba(255,255,255,.94);
  box-shadow: 0 18px 45px rgba(34,78,150,.17);
}
.summary-float strong { display: flex; align-items: center; gap: 7px; margin-bottom: 9px; color: var(--blue); }
.summary-float p { margin: 0; color: var(--muted); font-size: 13px; }
.wave { display: flex; height: 28px; align-items: center; gap: 4px; margin-top: 12px; }
.wave i { width: 4px; border-radius: 4px; background: linear-gradient(var(--cyan), var(--blue)); }
.wave i:nth-child(1), .wave i:nth-child(8) { height: 8px; }
.wave i:nth-child(2), .wave i:nth-child(7) { height: 16px; }
.wave i:nth-child(3), .wave i:nth-child(6) { height: 24px; }
.wave i:nth-child(4) { height: 18px; }
.wave i:nth-child(5) { height: 27px; }
section { padding: 82px 0; }
.section-soft { background: var(--pale); }
.section-dark { color: #fff; background: radial-gradient(circle at 15% 20%, rgba(34,211,238,.18), transparent 27%), linear-gradient(135deg, #081735, #123a7a 70%, #166fff); }
.section-head { max-width: 770px; margin: 0 auto 38px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.section-head h2 { margin-bottom: 12px; font-size: clamp(30px, 4vw, 45px); line-height: 1.2; letter-spacing: -.035em; }
.section-head p { margin: 0; color: var(--muted); font-size: 16px; }
.section-dark .section-head p { color: rgba(255,255,255,.74); }
.download-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--card);
  box-shadow: 0 13px 38px rgba(36,78,145,.07);
}
.download-card { display: flex; min-height: 285px; padding: 24px; flex-direction: column; justify-content: space-between; }
.os-icon, .feature-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 16px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  font-size: 22px;
  font-weight: 900;
}
.download-card h3 { margin-bottom: 8px; font-size: 21px; }
.meta { display: grid; gap: 5px; margin-bottom: 20px; color: var(--muted); font-size: 13px; }
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.feature-card { min-height: 225px; padding: 23px; }
.feature-card h3 { margin-bottom: 8px; font-size: 19px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
.solution-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 52px; align-items: center; }
.solution-copy h2 { margin-bottom: 17px; font-size: clamp(32px, 4vw, 48px); line-height: 1.2; letter-spacing: -.04em; }
.solution-copy p { color: var(--muted); }
.point-list { display: grid; gap: 11px; margin-top: 22px; }
.point { display: flex; gap: 12px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.check { color: var(--blue); font-weight: 900; }
.product-shot { padding: 14px; border: 1px solid #dce7fa; border-radius: 28px; background: linear-gradient(145deg,#eff5ff,#fff); box-shadow: var(--shadow); }
.product-shot > img { min-height: 340px; object-fit: cover; border-radius: 20px; background: #edf3ff; }
.thumbs { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-top: 12px; }
.thumbs img { aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--line); border-radius: 14px; background: #eef4ff; }
.trust-number { margin-bottom: 30px; text-align: center; font-size: clamp(48px, 8vw, 86px); line-height: 1; font-weight: 900; letter-spacing: -.05em; }
.brand-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 14px; }
.brand-grid div { display: grid; min-height: 88px; place-items: center; border: 1px solid rgba(255,255,255,.17); border-radius: 18px; background: rgba(255,255,255,.09); font-size: 20px; font-weight: 800; backdrop-filter: blur(10px); }
.content-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; align-items: start; }
.news-list, .faq-list { display: grid; gap: 14px; }
.news-card { display: grid; grid-template-columns: 128px 1fr; gap: 17px; padding: 14px; align-items: center; }
.news-card img { width: 128px; height: 96px; object-fit: cover; border-radius: 14px; background: #eef4ff; }
.news-card small { color: var(--blue); font-weight: 800; }
.news-card h3 { margin: 3px 0 4px; font-size: 18px; }
.news-card p, .faq-card p { margin: 0; color: var(--muted); font-size: 13px; }
.faq-card { padding: 18px 20px; }
.faq-card h3 { margin-bottom: 5px; font-size: 17px; }
.cta-wrap { padding-top: 0; }
.cta {
  position: relative;
  overflow: hidden;
  padding: 52px;
  color: #fff;
  border-radius: 30px;
  background: radial-gradient(circle at 90% 15%, rgba(34,211,238,.32), transparent 25%), linear-gradient(135deg, var(--blue), #204db5 68%, #101f51);
  box-shadow: 0 25px 70px rgba(22,119,255,.25);
}
.cta h2 { max-width: 760px; margin-bottom: 12px; font-size: clamp(32px,4vw,48px); line-height: 1.18; }
.cta > p { max-width: 760px; color: rgba(255,255,255,.82); }
.benefits { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin: 24px 0; }
.benefits div { padding: 15px; border: 1px solid rgba(255,255,255,.17); border-radius: 13px; background: rgba(255,255,255,.1); }
.page-hero { padding: 72px 0 54px; text-align: center; background: radial-gradient(circle at 50% 0,rgba(22,119,255,.12),transparent 45%),var(--pale); }
.page-hero h1 { margin-bottom: 13px; font-size: clamp(38px,5vw,58px); }
.page-hero p { max-width: 720px; margin: 0 auto; color: var(--muted); font-size: 17px; }
.breadcrumb { margin-bottom: 13px; color: var(--blue); font-size: 13px; font-weight: 800; }
.download-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.download-detail .card { padding: 28px; }
.download-detail h2 { margin-bottom: 8px; font-size: 26px; }
.detail-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 20px 0; }
.detail-meta div { padding: 12px; border-radius: 11px; background: var(--pale); color: var(--muted); font-size: 13px; }
.notice { margin-top: 22px; padding: 18px; border-left: 4px solid var(--blue); border-radius: 8px; background: #eef5ff; color: #52627d; }
.help-layout { display: grid; grid-template-columns: 260px 1fr; gap: 28px; align-items: start; }
.help-menu { position: sticky; top: 95px; padding: 18px; }
.help-menu a { display: block; padding: 11px 12px; border-radius: 9px; color: #566680; }
.help-menu a:hover { color: var(--blue); background: #eef5ff; }
.help-content { display: grid; gap: 18px; }
.help-block { padding: 26px; scroll-margin-top: 95px; }
.help-block h2 { margin-bottom: 10px; font-size: 25px; }
.help-block p, .help-block li { color: var(--muted); }
.help-block ol, .help-block ul { margin-bottom: 0; padding-left: 22px; }
.search-box { display: flex; max-width: 620px; margin: 26px auto 0; padding: 7px; border: 1px solid #dce6f6; border-radius: 14px; background: #fff; box-shadow: 0 12px 35px rgba(34,77,148,.08); }
.search-box input { min-width: 0; flex: 1; padding: 9px 12px; border: 0; outline: 0; color: var(--ink); }
.footer { padding: 28px 0; border-top: 1px solid var(--line); color: #6b7890; background: #fff; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
@media (max-width: 1024px) {
  .hero-grid, .solution-grid, .content-grid { grid-template-columns: 1fr; }
  .download-grid, .feature-grid { grid-template-columns: repeat(2,1fr); }
  .brand-grid { grid-template-columns: repeat(3,1fr); }
  .nav-links { display: none; }
  .summary-float { left: 12px; }
}
@media (max-width: 720px) {
  .container { width: min(100% - 28px,1180px); }
  .nav-actions .btn-light { display: none; }
  .hero { padding: 56px 0; }
  section { padding: 58px 0; }
  .download-grid, .feature-grid, .brand-grid, .benefits, .download-detail { grid-template-columns: 1fr; }
  .help-layout { grid-template-columns: 1fr; }
  .help-menu { position: static; }
  .hero-actions .btn, .download-card .btn { width: 100%; }
  .meeting-ui > img { min-height: 250px; }
  .summary-float { position: static; width: 100%; margin-top: 12px; }
  .news-card { grid-template-columns: 1fr; }
  .news-card img { width: 100%; height: 170px; }
  .cta { padding: 34px 23px; }
  .thumbs { grid-template-columns: 1fr; }
  .detail-meta { grid-template-columns: 1fr; }
}