:root{
  --bg:#ffffff; --fg:#0b1220; --muted:#64748b; --line:#e8edf5;
  --brand:#6366f1; --brand2:#8b5cf6; --accent:#f59e0b;
  --radius:20px; --shadow:0 18px 40px -12px rgba(15,23,42,.18);
  --shadow-sm:0 6px 18px -6px rgba(15,23,42,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:hidden;max-width:100%}
body{margin:0;background:var(--bg);color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.narrow{max-width:840px}
.muted{color:var(--muted)}

/* ===== Nav ===== */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid rgba(232,237,245,.9)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.2px}
.brand-dot{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 6px 16px -4px rgba(99,102,241,.6)}
.brand span{background:linear-gradient(135deg,#0b1220,#4f46e5);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;align-items:center;gap:30px;font-size:15px}
.nav-links a{color:#475569;transition:color .2s}
.nav-links a:hover{color:var(--fg)}
.nav-cta{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff!important;padding:10px 20px;border-radius:11px;font-weight:600;box-shadow:0 8px 20px -6px rgba(99,102,241,.6);transition:transform .15s,box-shadow .2s}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 26px -8px rgba(99,102,241,.7)}

/* ===== Hero ===== */
.hero{position:relative;padding:96px 0 56px;text-align:center;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% 0 auto 0;height:900px;
  background:radial-gradient(600px 320px at 20% 30%,rgba(99,102,241,.16),transparent 70%),
             radial-gradient(560px 300px at 80% 20%,rgba(139,92,246,.14),transparent 70%),
             radial-gradient(500px 260px at 50% 80%,rgba(14,165,233,.10),transparent 70%);
  pointer-events:none}
.hero .container{position:relative}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#4338ca;background:#eef2ff;border:1px solid #e0e7ff;padding:7px 16px;border-radius:999px;margin-bottom:26px;font-weight:500}
.badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.16)}
.hero h1{font-size:62px;line-height:1.1;margin:0 0 22px;letter-spacing:-2px;font-weight:850}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--brand) 0%,var(--brand2) 55%,#ec4899 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:19px;color:#5b6779;max-width:680px;margin:0 auto 38px;line-height:1.8;text-wrap:balance;word-break:keep-all}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 34px;border-radius:13px;font-weight:650;font-size:16px;transition:transform .16s,box-shadow .2s,background .2s;border:0;cursor:pointer;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 30px -10px rgba(99,102,241,.7)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 38px -12px rgba(99,102,241,.8)}
.btn-ghost{background:#fff;color:var(--fg);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:#c7d2fe;color:var(--brand);transform:translateY(-1px)}

/* ===== Trust strip ===== */
.trust{padding:0 0 12px}
.trust-inner{display:flex;justify-content:center;gap:52px;flex-wrap:wrap;padding:26px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
.trust-inner b{color:var(--fg);font-size:22px;font-weight:800;display:block;line-height:1.2}
.trust-inner div{text-align:center}

/* ===== Features ===== */
.features{padding:76px 0}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;text-align:left;transition:transform .2s,box-shadow .2s;overflow:hidden}
.feature::after{content:"";position:absolute;inset:auto -30px -40px auto;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.10),transparent 70%)}
.feature{cursor:pointer}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c7d2fe}
.feature .ico{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:13px;background:linear-gradient(135deg,#eef2ff,#f5f3ff);font-size:23px;margin-bottom:14px}
.feature h3{margin:0 0 6px;font-size:16px;font-weight:700}
.feature p{margin:0;font-size:14px;color:var(--muted);line-height:1.6}

/* ===== Products ===== */
.products{padding:88px 0;background:linear-gradient(180deg,#f8fafc,#fff 40%,#f8fafc);border-top:1px solid var(--line)}
.section-head{text-align:center;margin-bottom:14px}
.section-head h2{font-size:40px;margin:0 0 12px;letter-spacing:-1.2px;font-weight:820}
.section-head p{margin:0;color:var(--muted);font-size:16px}
.tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:34px 0 40px}
.tab{padding:10px 24px;border-radius:999px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:14px;color:#5b6779;transition:all .2s;font-family:inherit}
.tab.active,.tab:hover{background:linear-gradient(135deg,var(--brand),var(--brand2));border-color:transparent;color:#fff;box-shadow:0 8px 18px -8px rgba(99,102,241,.7)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:stretch}
#productGrid{display:flex;flex-wrap:wrap;justify-content:center;gap:26px}
#productGrid .card{flex:0 1 calc(33.333% - 18px);min-width:330px;max-width:440px;height:auto}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .22s cubic-bezier(.2,.8,.2,1),box-shadow .22s;box-shadow:var(--shadow-sm)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card-img{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,#eef2ff,#faf5ff)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.card:hover .card-img img{transform:scale(1.045)}
.card-img .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:52px;background:linear-gradient(135deg,#e0e7ff,#f3e8ff)}
.card-img .ph.gemini{background:linear-gradient(135deg,#dbeafe,#ede9fe 55%,#fce7f3)}
.card-cat{position:absolute;top:14px;left:14px;font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:#3730a3;background:rgba(255,255,255,.92);backdrop-filter:blur(6px);padding:5px 12px;border-radius:999px}
.card-badge{position:absolute;top:14px;right:14px;font-size:12px;font-weight:800;letter-spacing:.4px;color:#fff;background:rgba(11,18,32,.76);backdrop-filter:blur(8px);padding:6px 12px;border-radius:10px;box-shadow:0 4px 14px -6px rgba(11,18,32,.6)}
.card-body{padding:24px;display:flex;flex-direction:column;flex:1}
.card{height:100%}
.card h3{margin:0 0 8px;font-size:21px;letter-spacing:-.4px}
.card .desc{font-size:14.5px;color:#5b6779;margin:0 0 16px;line-height:1.7;min-height:50px}
.tags{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:18px}
.tag{font-size:12px;font-weight:600;background:#eef2ff;color:#4338ca;padding:4px 11px;border-radius:7px}
.tag.hot{background:#fff7ed;color:#c2410c}
.plans{border-top:1px dashed #e5eaf3;padding-top:8px;margin-top:auto}
.plan{display:flex;align-items:center;justify-content:space-between;padding:11px 0;gap:10px}
.plan+.plan{border-top:1px solid #f4f7fb}
.plan-left{display:flex;flex-direction:column;gap:2px}
.plan-name{font-size:14px;font-weight:600}
.plan-note{font-size:11px;color:#10b981;font-weight:600}
.plan-note-all{font-size:11.5px;color:#10b981;font-weight:600;padding:10px 0 2px;border-top:1px dashed #e5eaf3;margin-top:8px}
.plan-price{font-size:23px;font-weight:850;letter-spacing:-.8px;white-space:nowrap}
.plan-price small{font-size:13px;font-weight:600;color:var(--muted);margin-right:1px}
.buy{width:100%;margin-top:18px;padding:14px;border:0;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:15px;font-weight:700;cursor:pointer;font-family:inherit;transition:transform .15s,box-shadow .2s;box-shadow:0 10px 22px -10px rgba(99,102,241,.75)}
.buy:hover{transform:translateY(-1px);box-shadow:0 14px 28px -10px rgba(99,102,241,.85)}

/* ===== Article strip ===== */
.article-strip{padding:84px 0}
.article-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:box-shadow .2s,transform .2s;box-shadow:var(--shadow-sm)}
.article-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.article-card .date{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.4px}
.article-card h3{margin:10px 0 8px;font-size:19px;line-height:1.45;letter-spacing:-.3px}
.article-card p{margin:0;font-size:14px;color:var(--muted)}
.article-card .more{margin-top:16px;font-size:13px;font-weight:700;color:var(--brand)}

/* ===== FAQ ===== */
.faq{padding:0 0 96px}
.faq-item{border:1px solid var(--line);border-radius:15px;margin-bottom:12px;background:#fff;overflow:hidden;transition:box-shadow .2s}
.faq-item.open{box-shadow:var(--shadow-sm)}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:20px 24px;font-size:16px;font-weight:650;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--fg);font-family:inherit}
.faq-q .chev{transition:transform .25s;color:var(--muted);flex-shrink:0}
.faq-item.open .chev{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 24px;color:var(--muted);font-size:15px;line-height:1.75}
.faq-item.open .faq-a{max-height:420px;padding-bottom:20px}

/* ===== Footer ===== */
.footer{border-top:1px solid var(--line);padding:44px 0;background:#fff}
.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:14px;align-items:center}
.footer .brand{font-size:17px}

/* ===== Modal ===== */
.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;z-index:200;padding:20px}
.modal.open{display:flex}
.modal-backdrop{position:absolute;inset:0;background:rgba(11,18,32,.55);backdrop-filter:blur(6px)}
.modal-card{position:relative;background:#fff;border-radius:24px;padding:38px 32px 32px;max-width:430px;width:100%;text-align:center;box-shadow:0 40px 80px -20px rgba(11,18,32,.45);animation:pop .22s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{transform:scale(.94) translateY(8px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}
.modal-close{position:absolute;top:14px;right:16px;background:#f1f5f9;border:0;width:32px;height:32px;border-radius:50%;font-size:20px;color:#64748b;cursor:pointer;line-height:1;display:flex;align-items:center;justify-content:center}
.modal-close:hover{background:#e2e8f0;color:#0f172a}
.modal-card h3{margin:0 0 6px;font-size:21px;letter-spacing:-.4px}
.modal-sub{font-size:13px;color:var(--muted);margin:0 0 22px}
.qr-wrap{width:230px;height:230px;margin:0 auto 18px;border-radius:16px;border:1px dashed #dbe3ef;background:#f8fafc;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.qr-wrap img{width:100%;height:100%;object-fit:contain}
.qr-wrap .qr-ph{color:#94a3b8;font-size:13px;padding:20px;line-height:1.6}
.qr-fallback{font-size:13px;color:#f59e0b;margin:0}

/* ===== Prose ===== */
.prose{max-width:800px;margin:0 auto;padding:64px 24px 110px}
.prose h1{font-size:42px;line-height:1.22;margin:0 0 14px;letter-spacing:-1.2px}
.prose .meta{color:var(--muted);font-size:14px;margin-bottom:38px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.prose h2{font-size:27px;margin:44px 0 16px;letter-spacing:-.6px}
.prose h3{font-size:20px;margin:32px 0 12px}
.prose p{margin:0 0 18px;font-size:16.5px;line-height:1.85;color:#22303f}
.prose ul{padding-left:22px;margin:0 0 18px}
.prose li{margin-bottom:9px;line-height:1.8}
.prose blockquote{border-left:3px solid var(--brand);margin:0 0 20px;padding:8px 0 8px 20px;color:var(--muted);background:#f8fafc;border-radius:0 8px 8px 0}
.prose code{background:#f1f5f9;padding:2px 7px;border-radius:6px;font-size:14px}
.prose img{max-width:100%;height:auto;border-radius:14px;margin:20px 0;display:block;box-shadow:0 12px 30px -16px rgba(15,23,42,.3)}
.prose p:has(img){margin:20px 0}

/* ===== Docs two-column (articles) ===== */
.docs{display:flex;max-width:1240px;margin:0 auto;padding:0 24px;align-items:flex-start;min-height:70vh}
.docs-side{width:312px;flex-shrink:0;position:sticky;top:72px;max-height:calc(100vh - 72px);overflow-y:auto;padding:28px 20px 28px 0;border-right:1px solid var(--line)}
.docs-side::-webkit-scrollbar{width:5px}
.docs-side::-webkit-scrollbar-thumb{background:#dbe3ef;border-radius:3px}
.docs-side-head{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:700;color:#94a3b8;letter-spacing:.7px;margin-bottom:14px;padding-right:6px}
.docs-count{font-weight:500;color:#cbd5e1;font-size:11.5px}
.docs-list{display:flex;flex-direction:column;gap:2px}
.docs-item{display:flex;flex-direction:column;gap:3px;padding:11px 14px;border-radius:10px;transition:background .16s,border-color .16s;border-left:2px solid transparent}
.docs-item:hover{background:#f6f8fc}
.docs-item.on{background:#eef2ff;border-left-color:var(--brand)}
.docs-item-title{font-size:13.5px;font-weight:500;line-height:1.45;color:#334155}
.docs-item.on .docs-item-title{color:#3730a3;font-weight:650}
.docs-item-date{font-size:11px;color:#8898ab}
.docs-main{flex:1;min-width:0;padding:36px 0 90px 46px}
.docs-article{max-width:760px}
.docs-article h1{font-size:35px;line-height:1.25;margin:0 0 12px;letter-spacing:-1.1px}
.docs-article .meta{color:var(--muted);font-size:13.5px;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.docs-article h2{font-size:24px;margin:44px 0 14px;letter-spacing:-.5px}
.docs-article h3{font-size:19px;margin:28px 0 10px}
.docs-article p{margin:0 0 17px;font-size:16px;line-height:1.88;color:#22303f}
.docs-article ul{padding-left:22px;margin:0 0 16px}
.docs-article li{margin-bottom:8px;line-height:1.8}
.docs-article blockquote{border-left:3px solid var(--brand);margin:0 0 18px;padding:8px 0 8px 18px;color:var(--muted);background:#f8fafc;border-radius:0 8px 8px 0}
.docs-article img{max-width:100%;height:auto;border-radius:14px;margin:20px 0;box-shadow:0 12px 30px -16px rgba(15,23,42,.3)}
.docs-foot{margin-top:46px;padding-top:28px;border-top:1px solid var(--line)}
.docs-empty{color:var(--muted);padding:90px 0;text-align:center}

@media(max-width:900px){
  .docs{flex-direction:column;padding:0 16px;max-width:100%;box-sizing:border-box}
  .docs-side{width:100%;max-width:100%;min-width:0;box-sizing:border-box;position:static;max-height:none;border-right:0;border-bottom:1px solid var(--line);padding:20px 0 16px;overflow:hidden}
  .docs-list{flex-direction:row;overflow-x:auto;-webkit-overflow-scrolling:touch;gap:8px;padding-bottom:8px;width:100%;max-width:100%}
  .docs-list::-webkit-scrollbar{display:none}
  .docs-item{flex:0 0 218px;max-width:218px;min-width:0;border-left:0;border-bottom:2px solid transparent}
  .docs-item.on{border-left:0;border-bottom-color:var(--brand)}
  .docs-item-title{white-space:normal;overflow-wrap:anywhere}
  .docs-main{padding:26px 0 60px;width:100%;max-width:100%;min-width:0;box-sizing:border-box}
  .docs-article{max-width:100%}
  .docs-article h1{font-size:25px;letter-spacing:-.6px;overflow-wrap:anywhere}
  .docs-article h2{font-size:21px}
  .docs-article h3{font-size:17.5px}
  .docs-article p{font-size:15.5px;overflow-wrap:break-word}
  .docs-article li{overflow-wrap:break-word}
  .docs-article img{margin:16px 0}
}

/* ===== List page ===== */
.list-wrap{padding:72px 0 110px}
.list-item{display:block;padding:30px 0;border-bottom:1px solid var(--line);transition:padding-left .2s}
.list-item:hover{padding-left:8px}
.list-item .date{font-size:13px;color:var(--muted);font-weight:600}
.list-item h2{margin:8px 0;font-size:26px;letter-spacing:-.5px}
.list-item:hover h2{color:var(--brand)}
.list-item .sum{margin:0;color:var(--muted);font-size:15px}

@media(max-width:960px){
  #productGrid .card{flex:0 1 calc(50% - 13px);max-width:none}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr}
  .hero h1{font-size:42px;letter-spacing:-1px}
  .hero{padding:72px 0 56px}
  .section-head h2{font-size:30px}
  .nav-links{gap:16px;font-size:14px}
  .nav-links a:not(.nav-cta){display:none}
  .trust-inner{gap:28px}
  .prose h1{font-size:32px}
}
@media(max-width:520px){
  .container{padding:0 16px}
  #productGrid .card{flex:0 1 100%;min-width:0;max-width:100%}
  .grid-4{grid-template-columns:1fr}
  .hero h1{font-size:31px;letter-spacing:-.8px}
  .hero{padding:56px 0 40px}
  .lead{font-size:16px}
  .btn{padding:14px 24px;font-size:15px}
  .trust-inner{display:grid;grid-template-columns:1fr 1fr;gap:18px 12px;padding:22px 0}
  .trust-inner b{font-size:19px}
  .trust-inner div{font-size:12px}
  .section-head h2{font-size:26px}
  .tabs{gap:8px}
  .tab{padding:8px 16px;font-size:13px}
  .card-body{padding:20px}
  .plan-price{font-size:21px}
  .modal-card{padding:30px 22px 26px}
  .qr-wrap{width:200px;height:200px}
  .prose{padding:36px 16px 80px}
  .prose h1{font-size:27px}
  .footer-inner{flex-direction:column;gap:12px}
}