:root {
  --primary: #146cff;
  --primary-dark: #0754d8;
  --cyan: #00c9ea;
  --violet: #705cff;
  --green: #12b981;
  --ink: #0b1830;
  --muted: #64728a;
  --line: #e4ebf6;
  --soft: #f5f8fd;
  --card: #fff;
  --shadow: 0 20px 60px rgba(31, 76, 146, .11);
}
* { 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(1200px, calc(100% - 40px)); margin: 0 auto; }
.topbar { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(226,235,248,.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: 26px; }
.logo { display: flex; align-items: center; gap: 11px; color: var(--primary); font-size: 22px; font-weight: 900; }
.logo-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; color: #fff; background: linear-gradient(135deg,var(--primary),var(--cyan)); box-shadow: 0 12px 28px rgba(20,108,255,.27); }
.nav-links { display: flex; align-items: center; gap: 24px; color: #53627a; font-size: 14px; }
.nav-links a:hover, .inline-link { color: var(--primary); }
.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; font-weight: 800; transition: .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(135deg,var(--primary),#4a8eff); box-shadow: 0 14px 30px rgba(20,108,255,.24); }
.btn-outline { color: var(--primary); border-color: #cfe0ff; background: #fff; }
.btn-white { color: var(--primary); background: #fff; box-shadow: 0 14px 32px rgba(8,45,111,.17); }
.hero { position: relative; overflow: hidden; padding: 88px 0 82px; background: radial-gradient(circle at 10% 10%,rgba(0,201,234,.13),transparent 27%),radial-gradient(circle at 90% 4%,rgba(112,92,255,.13),transparent 26%),linear-gradient(180deg,#f3f8ff 0%,#fff 86%); }
.hero::after { content: ""; position: absolute; width: 520px; height: 520px; right: -240px; bottom: -280px; border-radius: 50%; border: 70px solid rgba(20,108,255,.04); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 58px; align-items: center; }
.pill { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 17px; padding: 7px 13px; color: var(--primary); border: 1px solid #d7e5ff; border-radius: 999px; background: rgba(255,255,255,.82); font-size: 13px; font-weight: 800; }
.spark { width: 18px; height: 18px; display: grid; place-items: center; border-radius: 6px; color: #fff; background: linear-gradient(135deg,var(--violet),var(--primary)); font-size: 10px; }
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(--primary),var(--violet),var(--cyan)); background-clip: text; }
.lead { max-width: 620px; margin-bottom: 27px; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-bottom: 18px; }
.requirements { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; color: #697891; list-style: none; font-size: 13px; }
.requirements li { padding: 6px 10px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.8); }
.ai-board { position: relative; padding: 16px; border: 1px solid rgba(255,255,255,.9); border-radius: 30px; background: rgba(255,255,255,.72); box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.ai-board > img { min-height: 380px; object-fit: cover; border-radius: 22px; background: #edf4ff; }
.ai-float { position: absolute; right: -22px; bottom: 28px; width: 260px; padding: 17px; border: 1px solid #dce7f8; border-radius: 18px; background: rgba(255,255,255,.95); box-shadow: 0 18px 45px rgba(28,76,150,.16); }
.ai-float strong { display: block; margin-bottom: 6px; color: var(--primary); }
.ai-float p { margin: 0; color: var(--muted); font-size: 13px; }
.ai-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.ai-tags span { padding: 4px 7px; border-radius: 6px; color: var(--primary); background: #edf4ff; font-size: 11px; font-weight: 800; }
section { padding: 82px 0; }
.soft { background: var(--soft); }
.dark { color: #fff; background: radial-gradient(circle at 15% 15%,rgba(0,201,234,.2),transparent 28%),linear-gradient(135deg,#07162f,#103b7d 68%,#156cff); }
.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: 11px; font-size: clamp(30px,4vw,45px); line-height: 1.2; letter-spacing: -.035em; }
.section-head p { margin: 0; color: var(--muted); font-size: 16px; }
.dark .section-head p { color: rgba(255,255,255,.75); }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.grid-5 { display: grid; grid-template-columns: repeat(5,1fr); gap: 16px; }
.card { border: 1px solid var(--line); border-radius: 22px; background: var(--card); box-shadow: 0 12px 36px rgba(35,78,146,.07); }
.download-card { display: flex; min-height: 282px; padding: 24px; flex-direction: column; justify-content: space-between; }
.app-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(--primary),var(--cyan)); font-size: 21px; font-weight: 900; }
.download-card h3 { margin-bottom: 7px; font-size: 21px; }
.meta { display: grid; gap: 5px; margin-bottom: 20px; color: var(--muted); font-size: 13px; }
.feature-card { min-height: 220px; padding: 23px; }
.feature-card h3 { margin-bottom: 8px; font-size: 19px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
.bento { display: grid; grid-template-columns: 1.12fr .88fr; gap: 18px; }
.bento-main,.bento-side { padding: 28px; overflow: hidden; }
.bento-main { display: grid; grid-template-columns: .9fr 1.1fr; gap: 25px; align-items: center; }
.bento h3 { margin-bottom: 8px; font-size: 26px; }
.bento p { color: var(--muted); }
.bento img { min-height: 255px; object-fit: cover; border-radius: 17px; background: #eef4ff; }
.bento-side { background: linear-gradient(145deg,#f1f6ff,#fff); }
.bento-side img { margin-top: 18px; }
.solution { display: grid; grid-template-columns: .92fr 1.08fr; gap: 50px; align-items: center; }
.solution-copy h2 { margin-bottom: 16px; font-size: clamp(32px,4vw,48px); line-height: 1.2; letter-spacing: -.04em; }
.solution-copy p { color: var(--muted); }
.points { display: grid; gap: 11px; margin-top: 22px; }
.point { display: flex; gap: 11px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.check { color: var(--primary); font-weight: 900; }
.product { padding: 14px; border: 1px solid #dce7fa; border-radius: 28px; background: linear-gradient(145deg,#eef5ff,#fff); box-shadow: var(--shadow); }
.product > img { min-height: 340px; object-fit: cover; border-radius: 20px; background: #edf4ff; }
.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: #edf4ff; }
.trust-num { margin-bottom: 28px; text-align: center; font-size: clamp(48px,8vw,84px); line-height: 1; font-weight: 900; letter-spacing: -.05em; }
.brands { display: grid; grid-template-columns: repeat(5,1fr); gap: 14px; }
.brands 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 { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; align-items: start; }
.news,.faqs { display: grid; gap: 14px; }
.news-item { display: grid; grid-template-columns: 128px 1fr; gap: 17px; padding: 14px; align-items: center; }
.news-item img { width: 128px; height: 96px; object-fit: cover; border-radius: 14px; background: #edf4ff; }
.news-item small { color: var(--primary); font-weight: 800; }
.news-item h3 { margin: 3px 0 4px; font-size: 18px; }
.news-item p,.faq p { margin: 0; color: var(--muted); font-size: 13px; }
.faq { padding: 18px 20px; }
.faq h3 { margin-bottom: 5px; font-size: 17px; }
.cta-section { padding-top: 0; }
.cta { padding: 52px; color: #fff; border-radius: 30px; background: radial-gradient(circle at 88% 15%,rgba(0,201,234,.3),transparent 26%),linear-gradient(135deg,var(--primary),#284cb4 68%,#111f50); box-shadow: 0 25px 70px rgba(20,108,255,.24); }
.cta h2 { max-width: 760px; margin-bottom: 11px; 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: 70px 0 52px; text-align: center; background: radial-gradient(circle at 50% 0,rgba(20,108,255,.13),transparent 44%),var(--soft); }
.page-hero h1 { margin-bottom: 12px; font-size: clamp(38px,5vw,58px); }
.page-hero p { max-width: 730px; margin: 0 auto; color: var(--muted); font-size: 17px; }
.breadcrumb { margin-bottom: 12px; color: var(--primary); font-size: 13px; font-weight: 800; }
.download-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.download-box { padding: 28px; scroll-margin-top: 95px; }
.download-box h2 { margin-bottom: 7px; font-size: 26px; }
.download-box > p { color: var(--muted); }
.detail-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 20px 0; }
.detail-meta div { padding: 12px; border-radius: 11px; background: var(--soft); color: var(--muted); font-size: 13px; }
.notice { margin-top: 22px; padding: 18px; border-left: 4px solid var(--primary); 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(--primary); background: #eef5ff; }
.help-content { display: grid; gap: 18px; }
.help-block { padding: 26px; scroll-margin-top: 95px; }
.help-block h2 { margin-bottom: 9px; 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 { display: flex; max-width: 620px; margin: 25px auto 0; padding: 7px; border: 1px solid #dce6f6; border-radius: 14px; background: #fff; box-shadow: 0 12px 35px rgba(34,77,148,.08); }
.search 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,.content,.bento { grid-template-columns: 1fr; }
  .grid-4,.grid-5 { grid-template-columns: repeat(2,1fr); }
  .brands { grid-template-columns: repeat(3,1fr); }
  .nav-links { display:none; }
  .ai-float { right:12px; }
}
@media (max-width:720px) {
  .container { width:min(100% - 28px,1200px); }
  .nav-actions .btn-outline { display:none; }
  .hero { padding:56px 0; }
  section { padding:58px 0; }
  .grid-4,.grid-5,.brands,.benefits,.download-detail,.bento-main { grid-template-columns:1fr; }
  .help-layout { grid-template-columns:1fr; }
  .help-menu { position:static; }
  .hero-actions .btn,.download-card .btn { width:100%; }
  .ai-board > img { min-height:250px; }
  .ai-float { position:static; width:100%; margin-top:12px; }
  .news-item { grid-template-columns:1fr; }
  .news-item img { width:100%; height:170px; }
  .cta { padding:34px 23px; }
  .thumbs { grid-template-columns:1fr; }
  .detail-meta { grid-template-columns:1fr; }
}