*{box-sizing:border-box}html,body{margin:0}
body{background:#0b0a0d;color:#ecebef;font-family:-apple-system,"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;line-height:1.6}
a{color:inherit}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.serif{font-family:"CC Wordmark",Georgia,serif}
.muted{color:rgba(236,235,239,.6)}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.55);text-transform:uppercase;margin-bottom:14px}
.pill{display:inline-flex;gap:8px;align-items:center;font-size:13px;padding:5px 12px;border-radius:99px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);color:rgba(255,255,255,.8);text-decoration:none}
.pill b{color:#fff;font-weight:600}
/* hero */
.hero{position:relative;overflow:hidden;padding:96px 0 0;text-align:center}
.hero::before{content:"";position:absolute;inset:0;background:url(bg.jpg) center/cover;opacity:.55;filter:saturate(1.15)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,10,13,.35) 0%,rgba(11,10,13,.2) 40%,#0b0a0d 92%)}
.hero>*{position:relative;z-index:1}
.wordmark{font-family:"CC Wordmark",Georgia,serif;font-weight:500;font-size:clamp(64px,11vw,148px);line-height:.95;letter-spacing:-.01em;margin:22px 0 10px;color:#fff}
.wordmark i{font-weight:400}
.tagline{font-size:clamp(18px,2.2vw,22px);color:rgba(255,255,255,.82);margin:0 auto 34px;max-width:620px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:12px;font-size:15px;font-weight:600;text-decoration:none;transition:.15s;border:1px solid transparent}
.btn-primary{background:#fff;color:#111}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 30px -10px rgba(255,255,255,.4)}
.btn-ghost{border-color:rgba(255,255,255,.2);color:#fff;background:rgba(255,255,255,.04)}.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn small{font-weight:400;opacity:.6;font-size:12px}
.ctas{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.cta-note{font-size:12.5px;color:rgba(255,255,255,.5);margin-top:14px}
.shot{margin:64px auto 0;max-width:1080px;padding:0 24px}
.caption{font-size:12px;color:rgba(255,255,255,.38);text-align:center;margin-top:12px}
/* sections */
section{padding:96px 0}
h2{font-size:clamp(28px,3.6vw,42px);line-height:1.2;margin:0 0 14px;font-weight:650;letter-spacing:-.01em}
.lead{font-size:17px;color:rgba(236,235,239,.62);max-width:620px;margin:0}
.center{text-align:center}.center .lead{margin:0 auto}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:48px}
.card{background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:26px}
.card h3{font-size:17px;margin:14px 0 6px}.card p{margin:0;font-size:14.5px;color:rgba(236,235,239,.6)}
.ico{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-size:17px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1)}
.feature{display:grid;grid-template-columns:1fr 1.2fr;gap:56px;align-items:center;padding:72px 0;border-top:1px solid rgba(255,255,255,.06)}
.feature.rev>.txt{order:2}
.feature ul{padding:0;list-style:none;margin:22px 0 0}.feature li{padding:6px 0 6px 22px;position:relative;color:rgba(236,235,239,.75);font-size:15px}
.feature li::before{content:"";position:absolute;left:2px;top:15px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,#f6a6c1,#f7c76b)}
.band{position:relative;border-radius:28px;overflow:hidden;padding:72px 32px;text-align:center;margin:0 24px}
.band::before{content:"";position:absolute;inset:0;background:url(bg.jpg) center/cover;opacity:.7}
.band::after{content:"";position:absolute;inset:0;background:rgba(11,10,13,.45)}
.band>*{position:relative;z-index:1}
footer.foot{border-top:1px solid rgba(255,255,255,.07);padding:40px 0 56px;margin-top:96px;font-size:13px;color:rgba(255,255,255,.45)}
footer.foot .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer .wm{font-family:"CC Wordmark",Georgia,serif;font-size:22px;color:#fff}
/* download */
.dl{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:44px}
.dlcard{position:relative;border-radius:22px;padding:34px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.09);transition:.2s}
.dlcard.rec{border-color:rgba(255,255,255,.35);background:rgba(255,255,255,.06);box-shadow:0 30px 80px -40px rgba(246,166,193,.5)}
.dlcard .badge{position:absolute;top:22px;right:22px;font-size:12px;padding:3px 10px;border-radius:99px;background:#fff;color:#111;font-weight:600;display:none}
.dlcard.rec .badge{display:block}
.dlcard h3{font-size:24px;margin:18px 0 4px}.dlcard .meta{color:rgba(236,235,239,.55);font-size:14px;margin-bottom:24px}
.os{font-size:34px;line-height:1}
.hash{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:11.5px;word-break:break-all;color:rgba(236,235,239,.55);background:rgba(0,0,0,.3);border-radius:10px;padding:10px 12px;margin-top:20px}
.hash b{display:block;color:rgba(236,235,239,.8);font-family:inherit;font-weight:500;margin-bottom:3px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}
.steps{counter-reset:s;list-style:none;padding:0;margin:16px 0 0}
.steps li{counter-increment:s;position:relative;padding:0 0 14px 36px;font-size:14.5px;color:rgba(236,235,239,.75)}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:24px;height:24px;border-radius:50%;background:rgba(255,255,255,.1);display:grid;place-items:center;font-size:12px}
kbd{font-family:inherit;font-size:12.5px;padding:1px 7px;border-radius:6px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14)}
table.req{width:100%;border-collapse:collapse;font-size:14px;margin-top:12px}
table.req td{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.07);vertical-align:top}table.req td:first-child{color:rgba(236,235,239,.5);width:34%}
.log{border-left:1px solid rgba(255,255,255,.12);margin:48px 0 0 8px;padding-left:28px}
.log .rel{position:relative;padding-bottom:44px}.log .rel::before{content:"";position:absolute;left:-34px;top:8px;width:11px;height:11px;border-radius:50%;background:#f6a6c1;box-shadow:0 0 0 4px rgba(246,166,193,.18)}
.log h3{margin:0;font-size:20px}.log time{font-size:13px;color:rgba(236,235,239,.45)}
.log ul{margin:10px 0 0;padding-left:18px;color:rgba(236,235,239,.72);font-size:14.5px}
@media(max-width:860px){
 .grid{grid-template-columns:1fr}.feature{grid-template-columns:1fr;gap:28px;padding:48px 0}.feature.rev>.txt{order:0}
 .dl,.cols{grid-template-columns:1fr}section{padding:64px 0}.hero{padding-top:64px}.band{margin:0 12px;padding:52px 20px}
 .shot{padding:0 12px;margin-top:40px}
}
/* ===== Mockup UI (示意图，非真实截图) ===== */
.mk{border-radius:14px;overflow:hidden;background:#141217;border:1px solid rgba(255,255,255,.1);box-shadow:0 50px 120px -40px rgba(0,0,0,.8),0 0 0 1px rgba(0,0,0,.4);text-align:left;font-size:12.5px;color:#d9d7de}
.mk-bar{height:34px;display:flex;align-items:center;gap:7px;padding:0 12px;background:#1b181f;border-bottom:1px solid rgba(255,255,255,.06)}
.mk-bar i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.mk-bar i:nth-child(2){background:#febc2e}.mk-bar i:nth-child(3){background:#28c840}
.mk-bar span{margin:0 auto;font-size:11.5px;color:rgba(255,255,255,.4)}
.mk-body{display:grid;grid-template-columns:200px 1fr;min-height:420px}
.mk-side{background:#17151a;border-right:1px solid rgba(255,255,255,.06);padding:12px 10px}
.mk-side .sec{font-size:10.5px;color:rgba(255,255,255,.35);margin:12px 8px 6px;letter-spacing:.05em}
.mk-side .it{padding:6px 8px;border-radius:7px;display:flex;gap:8px;align-items:center;color:rgba(255,255,255,.7)}
.mk-side .it.on{background:rgba(255,255,255,.08);color:#fff}
.dot{width:8px;height:8px;border-radius:3px;display:inline-block;flex:none}
.mk-main{padding:18px 22px;display:flex;flex-direction:column;gap:12px}
.msg{display:flex;gap:10px}.av{width:26px;height:26px;border-radius:8px;flex:none;display:grid;place-items:center;font-size:11px;font-weight:700;color:#111}
.bub{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07);padding:9px 12px;border-radius:10px;line-height:1.55}
.bub.me{background:rgba(246,166,193,.12);border-color:rgba(246,166,193,.22)}
.tool{font-family:ui-monospace,Menlo,monospace;font-size:11px;color:rgba(255,255,255,.5);background:rgba(0,0,0,.25);padding:6px 9px;border-radius:7px;margin-top:6px}
.inp{margin-top:auto;border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:10px 12px;color:rgba(255,255,255,.35);display:flex;justify-content:space-between}
.mk-sm{min-height:0}.mk-sm .mk-body{grid-template-columns:1fr;min-height:300px}
.row{display:flex;align-items:center;gap:10px;padding:9px 12px;border-bottom:1px solid rgba(255,255,255,.05)}
.row .t{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .s{color:rgba(255,255,255,.4);font-size:11px}
.tag{font-size:10.5px;padding:1px 7px;border-radius:99px;background:rgba(255,255,255,.08);color:rgba(255,255,255,.65)}
.bars{display:flex;align-items:flex-end;gap:8px;height:130px;padding:0 4px}
.bars div{flex:1;border-radius:5px 5px 2px 2px;background:linear-gradient(180deg,#f6a6c1,#9b7bf0)}
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.kpi{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.07);border-radius:10px;padding:10px 12px}
.kpi b{display:block;font-size:20px;color:#fff;font-weight:600}.kpi span{font-size:11px;color:rgba(255,255,255,.45)}
.mk-pad{padding:18px}
@media(max-width:860px){.mk-body{grid-template-columns:1fr}.mk-side{display:none}}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:48px}
.bento .card{grid-column:span 2}.bento .w3{grid-column:span 3}.bento .w4{grid-column:span 4}
.bento .vis{margin-top:18px}
@media(max-width:860px){.bento{grid-template-columns:1fr}.bento .card,.bento .w3,.bento .w4{grid-column:auto}}
details.faq{border-bottom:1px solid rgba(255,255,255,.08);padding:16px 0}
details.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between}
details.faq summary::after{content:"+";opacity:.5}details.faq[open] summary::after{content:"–"}
details.faq p{margin:10px 0 0;color:rgba(236,235,239,.65);font-size:14.5px}
/* ===== Light SaaS theme (visual style inspired by Cruip "Simple"; original code) ===== */
body{background:#f8fafc;color:#0f172a}
.muted{color:#64748b}.eyebrow{color:#2563eb;font-weight:600;letter-spacing:.12em}
.pill{background:#fff;border-color:rgba(15,23,42,.1);color:#475569;box-shadow:0 1px 2px rgba(15,23,42,.05)}.pill b{color:#2563eb}
.hero{padding-top:72px}
.hero::before{opacity:.32;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 20%,#000 30%,transparent 80%);mask-image:radial-gradient(ellipse 70% 60% at 50% 20%,#000 30%,transparent 80%)}
.hero::after{background:linear-gradient(180deg,rgba(248,250,252,.1),rgba(248,250,252,0) 50%,#f8fafc 95%)}
.wordmark{color:#0f172a;padding:6px 0;border-image:linear-gradient(to right,transparent,rgba(148,163,184,.6),transparent) 1;border-style:solid;border-width:1px 0}
.tagline{color:#334155}
.btn-primary{background:linear-gradient(to top,#2563eb,#3b82f6);color:#fff;box-shadow:inset 0 1px 0 rgba(255,255,255,.16),0 8px 20px -8px rgba(37,99,235,.7)}
.btn-primary:hover{box-shadow:0 12px 28px -10px rgba(37,99,235,.8)}
.btn-ghost{background:#fff;color:#0f172a;border-color:rgba(15,23,42,.1);box-shadow:0 1px 2px rgba(15,23,42,.06)}.btn-ghost:hover{background:#f1f5f9}
.cta-note{color:#64748b}.cta-note a{color:#2563eb}.caption{color:#94a3b8}
.lead{color:#475569}
.card{background:#fff;border-color:rgba(15,23,42,.07);box-shadow:0 1px 2px rgba(15,23,42,.04),0 10px 30px -18px rgba(15,23,42,.18)}
.card p{color:#64748b}
.ico{background:linear-gradient(135deg,#eff6ff,#e0e7ff);border-color:rgba(37,99,235,.15);color:#2563eb}
.feature{border-top-color:rgba(15,23,42,.07)}.feature li{color:#334155}
.band{background:#0f172a;color:#fff}.band::before{opacity:.5}.band::after{background:linear-gradient(180deg,rgba(15,23,42,.35),rgba(15,23,42,.65))}
.band h2{color:#fff}
footer.foot{border-top-color:rgba(15,23,42,.08);color:#64748b}footer .wm{color:#0f172a}footer a{color:#2563eb}
.dlcard{background:#fff;border-color:rgba(15,23,42,.08);box-shadow:0 10px 30px -18px rgba(15,23,42,.2)}
.dlcard.rec{border-color:#3b82f6;background:#fff;box-shadow:0 0 0 3px rgba(59,130,246,.12),0 30px 60px -30px rgba(37,99,235,.45)}
.dlcard .badge{background:#2563eb;color:#fff}.dlcard .meta{color:#64748b}
.hash{background:#f1f5f9;color:#64748b}.hash b{color:#334155}
.steps li{color:#334155}.steps li::before{background:#eff6ff;color:#2563eb;font-weight:600}
kbd{background:#f1f5f9;border-color:#e2e8f0}
table.req td{border-bottom-color:#e2e8f0}table.req td:first-child{color:#64748b}
.log{border-left-color:#cbd5e1}.log .rel::before{background:#2563eb;box-shadow:0 0 0 4px rgba(37,99,235,.15)}.log time{color:#64748b}.log ul{color:#334155}
details.faq{border-bottom-color:#e2e8f0}details.faq p{color:#475569}
a{color:inherit}.tagline a{color:#2563eb}
.dark-sec{background:#0f172a;color:#e2e8f0}.dark-sec h2{color:#fff}.dark-sec .lead{color:#94a3b8}
.dark-sec .card{background:rgba(255,255,255,.03);border-color:rgba(255,255,255,.08);box-shadow:none}.dark-sec .card p{color:#94a3b8}
.dark-sec .ico{background:rgba(59,130,246,.15);border-color:rgba(59,130,246,.3);color:#93c5fd}.dark-sec .eyebrow{color:#93c5fd}
.shot .mk{box-shadow:0 0 0 1px rgba(15,23,42,.1),0 40px 80px -30px rgba(15,23,42,.45)}
/* ===== Airy light override: no dark surfaces ===== */
body{background:#fbfaff;color:#1e293b}
.dark-sec{background:linear-gradient(180deg,#f5f3ff 0%,#fdf2f8 55%,#eff6ff 100%);color:#334155}
.dark-sec h2{color:#1e293b}.dark-sec .lead,.dark-sec .card p{color:#64748b}
.dark-sec .card{background:rgba(255,255,255,.75);border-color:rgba(15,23,42,.06);box-shadow:0 8px 24px -14px rgba(124,58,237,.25)}
.dark-sec .ico{background:linear-gradient(135deg,#eff6ff,#f3e8ff);border-color:rgba(37,99,235,.15);color:#2563eb}.dark-sec .eyebrow{color:#2563eb}
.band{background:linear-gradient(135deg,#eef2ff,#fdf2f8);color:#1e293b}.band::after{background:linear-gradient(180deg,rgba(255,255,255,.5),rgba(255,255,255,.7))}
.mk{background:#fff;border:1px solid rgba(15,23,42,.08);box-shadow:0 30px 70px -30px rgba(100,116,139,.35),0 2px 6px rgba(15,23,42,.04);color:#334155}
.mk-bar{background:#f8fafc;border-bottom:1px solid rgba(15,23,42,.06)}.mk-bar span{color:#94a3b8}
.mk-side{background:#f8f7fc;border-right:1px solid rgba(15,23,42,.06)}
.mk-side .sec{color:#94a3b8}.mk-side .it{color:#475569}.mk-side .it.on{background:#eef2ff;color:#1e293b}
.bub{background:#f8fafc;border-color:rgba(15,23,42,.07)}.bub.me{background:#fdf2f8;border-color:rgba(236,72,153,.18)}
.tool{color:#64748b;background:#f1f5f9}.inp{border-color:rgba(15,23,42,.12);color:#94a3b8;background:#fff}
.row{border-bottom-color:rgba(15,23,42,.06)}.row .s{color:#94a3b8}
.tag{background:#f1f5f9;color:#475569}.kpi{background:#fafbff;border-color:rgba(15,23,42,.07)}.kpi b{color:#1e293b}.kpi span{color:#64748b}
.av{color:#1e293b}
details.faq{border-bottom-color:rgba(15,23,42,.08)}details.faq p{color:#64748b}
footer.foot{background:#fff}
.hero::after{background:linear-gradient(180deg,rgba(255,255,255,0) 40%,#fbfaff 95%)}