:root{
  --bg:#ffffff; --soft:#f6f7fb; --soft2:#eef1f8;
  --ink:#0d1424; --ink2:#39435c; --muted:#6b7488;
  --line:#e5e8f0; --line2:#d6dbe7;
  --brand:#4f46e5; --brand-d:#4338ca; --brand-l:#eef0ff;
  --accent:#0ea5e9; --ok:#0f9d68;
  --r-lg:22px; --r-md:16px; --r-sm:11px;
  --sh-sm:0 1px 2px rgba(13,20,36,.06),0 1px 3px rgba(13,20,36,.04);
  --sh-md:0 4px 12px rgba(13,20,36,.05),0 12px 32px -12px rgba(13,20,36,.12);
  --sh-lg:0 24px 64px -24px rgba(23,31,64,.28);
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.021em;font-weight:680}
p{margin:0}
a{color:inherit;text-decoration:none}
img,canvas{max-width:100%;display:block}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:820px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--muted)}
.small{font-size:13.5px}
.xsmall{font-size:12.5px}
.center{text-align:center}
.grad{background:linear-gradient(100deg,#4f46e5,#0ea5e9 55%,#22c55e);-webkit-background-clip:text;background-clip:text;color:transparent}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;
  border-radius:12px;padding:11px 18px;font-size:14.5px;font-weight:600;cursor:pointer;
  transition:transform .12s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease;
  font-family:inherit;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(180deg,#5b52ea,#4338ca);color:#fff;box-shadow:0 1px 2px rgba(67,56,202,.4),0 8px 20px -8px rgba(67,56,202,.6)}
.btn-primary:hover{box-shadow:0 2px 4px rgba(67,56,202,.4),0 14px 28px -10px rgba(67,56,202,.65)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--line2);color:var(--ink)}
.btn-ghost:hover{background:var(--soft);border-color:#c3cada}
.btn-lg{padding:14px 24px;font-size:15.5px;border-radius:13px}
.btn-sm{padding:8px 14px;font-size:13.5px;border-radius:10px}
.btn-block{width:100%}

/* header */
.site-head{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.head-inner{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;letter-spacing:-.02em}
.brand-mark{width:28px;height:28px}
.head-nav{display:flex;gap:22px;font-size:14.5px;color:var(--ink2);font-weight:520}
.head-nav a:hover{color:var(--brand)}
.head-right{margin-inline-start:auto;display:flex;align-items:center;gap:12px}
.lang-picker select{appearance:none;border:1px solid var(--line2);background:#fff;border-radius:10px;
  padding:7px 28px 7px 11px;font-size:13.5px;font-family:inherit;color:var(--ink2);cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7488' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 8px center;background-size:14px}

/* hero */
.hero{padding:74px 0 26px;background:
  radial-gradient(900px 420px at 50% -160px,rgba(99,102,241,.16),transparent 70%),
  radial-gradient(600px 300px at 85% 0,rgba(14,165,233,.10),transparent 70%)}
.hero-inner{text-align:center;max-width:840px;margin:0 auto}
.pill{display:inline-block;font-size:12.5px;font-weight:600;color:var(--brand-d);background:var(--brand-l);
  border:1px solid #dcdcfb;padding:5px 13px;border-radius:999px;letter-spacing:.01em}
.hero h1{font-size:clamp(34px,5.4vw,60px);margin:20px 0 0;font-weight:700;letter-spacing:-.035em}
.lede{margin:20px auto 0;max-width:620px;font-size:17.5px;color:var(--ink2)}
.hero-cta{display:flex;gap:12px;justify-content:center;margin-top:30px;flex-wrap:wrap}
.trust{display:flex;gap:26px;justify-content:center;list-style:none;padding:0;margin:26px 0 0;flex-wrap:wrap;
  font-size:13.5px;color:var(--muted)}
.trust li{display:flex;align-items:center;gap:7px}
.trust li::before{content:"";width:15px;height:15px;border-radius:50%;
  background:var(--ok) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 13 4 4L19 7'/%3E%3C/svg%3E") center/10px no-repeat;flex:none}

/* cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-sm)}
.tool-sec{padding:14px 0 8px}
.tool-card{padding:22px;box-shadow:var(--sh-md)}
.tool-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:16px}
.tool-head h2{font-size:19px}
.chip{font-size:12px;font-weight:600;padding:5px 11px;border-radius:999px;white-space:nowrap}
.chip-live{color:var(--ok);background:#eafaf2;border:1px solid #c9efdd}

/* dropzone */
.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;
  padding:52px 24px;border:1.6px dashed var(--line2);border-radius:var(--r-md);background:
  linear-gradient(180deg,#fbfcff,#f7f9fe);cursor:pointer;transition:border-color .16s,background .16s;text-align:center}
.dropzone:hover,.dropzone:focus-visible,.dropzone.drag{border-color:#8b8cf5;background:#f4f5ff;outline:none}
.dz-ico{width:44px;height:44px;color:#8b8cf5;margin-bottom:4px}
.dz-title{font-size:17px;font-weight:640}
.dropzone .btn{margin-top:8px}

/* workspace */
.workspace{margin-top:4px}
.compare{position:relative;margin-inline:auto;width:100%;min-height:260px;overflow:hidden;border-radius:var(--r-md);
  background:#0d1424 repeating-conic-gradient(#1b2438 0% 25%,#131b2c 0% 50%) 50%/18px 18px;
  user-select:none;touch-action:none;line-height:0}
.cmp-layer{position:absolute;inset:0;line-height:0}
.cmp-layer canvas{width:100%;height:100%;display:block}
.cmp-before{clip-path:inset(0 50% 0 0)}
.cmp-handle{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.16);cursor:ew-resize;z-index:3}
.cmp-knob{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:36px;height:36px;border-radius:50%;
  background:var(--brand);display:grid;place-items:center;box-shadow:0 4px 14px rgba(0,0,0,.28)}
.cmp-tag{position:absolute;bottom:10px;font-size:11.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
  background:rgba(13,20,36,.72);color:#fff;padding:4px 9px;border-radius:6px;z-index:2;backdrop-filter:blur(4px)}
.cmp-tag-l{left:10px}.cmp-tag-r{right:10px}

.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px 18px;margin-top:18px}
.ctl{display:flex;flex-direction:column;gap:7px;min-width:0}
.ctl label{font-size:12.5px;font-weight:640;color:var(--ink2);display:flex;justify-content:space-between;gap:6px}
.ctl output{color:var(--brand);font-variant-numeric:tabular-nums}
.ctl select{border:1px solid var(--line2);border-radius:10px;padding:8px 10px;font-family:inherit;font-size:13.5px;background:#fff;color:var(--ink)}
input[type=range]{-webkit-appearance:none;appearance:none;height:5px;border-radius:99px;background:var(--soft2);outline:none;margin:8px 0}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:17px;height:17px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);box-shadow:0 1px 4px rgba(0,0,0,.18);cursor:pointer}
input[type=range]::-moz-range-thumb{width:15px;height:15px;border-radius:50%;background:#fff;border:2px solid var(--brand);cursor:pointer}
.segmented{display:flex;background:var(--soft2);border-radius:10px;padding:3px;gap:3px}
.segmented button{flex:1;border:0;background:transparent;padding:7px 4px;border-radius:8px;font-family:inherit;
  font-size:13.5px;font-weight:620;color:var(--ink2);cursor:pointer;transition:.15s}
.segmented button.on{background:#fff;color:var(--brand-d);box-shadow:var(--sh-sm)}
.segmented button:disabled{opacity:.45;cursor:not-allowed}

.actions{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:18px;flex-wrap:wrap}
.meta{display:flex;gap:14px;flex-wrap:wrap;font-variant-numeric:tabular-nums}
.action-btns{display:flex;gap:10px;margin-inline-start:auto}
.progress{position:relative;height:30px;background:var(--soft2);border-radius:9px;overflow:hidden;margin-top:14px}
.progress .bar{height:100%;width:0;background:linear-gradient(90deg,#6366f1,#0ea5e9);transition:width .2s}
.progress span{position:absolute;inset:0;display:grid;place-items:center;font-size:12.5px;font-weight:650;color:var(--ink2)}

/* sections */
.feat-sec,.how-sec,.price-sec,.faq-sec{padding:76px 0}
.feat-sec{background:var(--soft);border-block:1px solid var(--line)}
.sec-h{font-size:clamp(26px,3.4vw,36px);text-align:center;letter-spacing:-.03em}
.sec-p{text-align:center;color:var(--muted);margin:12px auto 0;max-width:600px;font-size:16px}
.grid{display:grid;gap:18px;margin-top:38px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.feat{padding:24px 22px}
.feat .fi{font-size:22px;width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-sm);margin-bottom:14px}
.feat h3{font-size:16px;margin-bottom:7px}
.feat p{font-size:14px;color:var(--muted);line-height:1.62}

.step{position:relative;padding:0 4px}
.step .num{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;font-size:14.5px;font-weight:700;
  color:#fff;background:linear-gradient(160deg,#6366f1,#4338ca);box-shadow:0 6px 16px -6px rgba(67,56,202,.7);margin-bottom:14px}
.step h3{font-size:16.5px;margin-bottom:7px}
.step p{font-size:14.2px;color:var(--muted)}

/* pricing */
.price-sec{background:linear-gradient(180deg,#fff,#f8f9fe)}
.price-grid{align-items:stretch}
.price{position:relative;padding:26px 24px;display:flex;flex-direction:column}
.price h3{font-size:16.5px;color:var(--ink2)}
.amount{font-size:40px;font-weight:720;letter-spacing:-.04em;margin:8px 0 4px;line-height:1.1}
.amount .cur{font-size:22px;vertical-align:super;font-weight:600;margin-inline-end:2px}
.amount .per{font-size:14px;font-weight:500;color:var(--muted);letter-spacing:0}
.price ul{list-style:none;padding:0;margin:16px 0 22px;display:grid;gap:9px;font-size:14px;color:var(--ink2)}
.price li{display:flex;gap:9px;align-items:flex-start}
.price li::before{content:"";flex:none;width:16px;height:16px;margin-top:2px;border-radius:50%;
  background:var(--brand-l) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234f46e5' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 13 4 4L19 7'/%3E%3C/svg%3E") center/10px no-repeat}
.price .btn{margin-top:auto}
.price-pop{border:1.6px solid #c7c8fb;box-shadow:0 20px 48px -22px rgba(79,70,229,.5);transform:translateY(-4px)}
.badge-pop{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(180deg,#6366f1,#4338ca);
  color:#fff;font-size:11.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:5px 13px;border-radius:999px;white-space:nowrap}
.price-note{margin-top:26px}

/* faq */
.faq{margin-top:30px;display:grid;gap:10px}
.faq details{border:1px solid var(--line);border-radius:14px;background:#fff;padding:0;overflow:hidden;transition:border-color .16s}
.faq details[open]{border-color:#cfd2f7;box-shadow:var(--sh-sm)}
.faq summary{cursor:pointer;padding:17px 20px;font-weight:620;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;gap:14px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:19px;color:var(--muted);font-weight:400;line-height:1;flex:none}
.faq details[open] summary::after{content:"–"}
.faq p{padding:0 20px 18px;color:var(--muted);font-size:14.6px;line-height:1.7}

/* footer */
.site-foot{border-top:1px solid var(--line);background:var(--soft);padding:52px 0 26px;margin-top:0}
.foot-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.foot-brand strong{font-size:16px}
.foot-brand p{margin-top:8px;max-width:280px}
.foot-col h4{font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:12px;font-weight:650}
.foot-col a{display:block;font-size:14px;color:var(--ink2);padding:3px 0}
.foot-col a:hover{color:var(--brand)}
.foot-langs{display:flex;flex-wrap:wrap;gap:4px 12px}
.foot-langs a{font-size:13px;padding:2px 0}
.foot-langs a[aria-current]{color:var(--brand);font-weight:650}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;margin-top:38px;padding-top:18px;border-top:1px solid var(--line2);
  font-size:12.5px;color:var(--muted);flex-wrap:wrap}

/* modal */
.modal{border:0;border-radius:18px;padding:28px;max-width:600px;width:calc(100% - 32px);box-shadow:var(--sh-lg);color:var(--ink)}
.modal::backdrop{background:rgba(13,20,36,.42);backdrop-filter:blur(3px)}
.modal h3{font-size:19px;margin-bottom:12px;padding-inline-end:26px}
.modal p{font-size:14.5px;color:var(--ink2);margin-bottom:11px;line-height:1.7}
.modal ul{font-size:14.5px;color:var(--ink2);padding-inline-start:20px;margin:0 0 12px;line-height:1.75}
.modal-x{position:absolute;top:14px;inset-inline-end:16px;border:0;background:var(--soft);width:30px;height:30px;border-radius:9px;
  font-size:19px;line-height:1;color:var(--muted);cursor:pointer}
.modal-x:hover{background:var(--soft2);color:var(--ink)}

/* toast */
.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);background:#0d1424;color:#fff;
  padding:11px 18px;border-radius:11px;font-size:13.8px;opacity:0;pointer-events:none;transition:.24s;z-index:60;max-width:90vw;text-align:center}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* license + success page */
.linkbtn{border:0;background:none;color:var(--brand);font:inherit;font-size:13.5px;font-weight:600;
  cursor:pointer;padding:6px 4px;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.linkbtn:hover{color:var(--brand-d)}
.lic-form{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.lic-form input{flex:1 1 200px;min-width:0;border:1px solid var(--line2);border-radius:11px;padding:11px 13px;
  font-family:inherit;font-size:14px;letter-spacing:.06em;background:#fff;color:var(--ink)}
.lic-form input:focus{outline:2px solid #c7c8fb;outline-offset:1px;border-color:#a5a6f6}
.lic-msg{font-size:13.5px;margin-top:10px}
.lic-msg.ok{color:var(--ok)}
.lic-msg.bad{color:#d93b3b}

.page-success{background:radial-gradient(900px 420px at 50% -180px,rgba(99,102,241,.14),transparent 70%)}
.success-main{padding:48px 24px 64px;display:grid;place-items:center;min-height:calc(100vh - 64px)}
.success-card{max-width:600px;width:100%;padding:40px 32px;text-align:center;box-shadow:var(--sh-md)}
.success-ico{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;margin:0 auto 18px;
  background:linear-gradient(160deg,#34d399,#0f9d68);box-shadow:0 10px 24px -10px rgba(15,157,104,.7)}
.success-card h1{font-size:26px;letter-spacing:-.03em}
.success-desc{color:var(--ink2);margin-top:12px;font-size:15.5px;line-height:1.68}
.lic-box{margin:28px 0 22px;padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--soft);text-align:start}
.lic-box h2{font-size:15.5px;margin-bottom:6px}

@media (max-width:960px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .controls{grid-template-columns:repeat(2,1fr)}
  .foot-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .head-nav{display:none}
  .tool-head{flex-direction:column;align-items:flex-start;gap:8px}
  .hero{padding:52px 0 18px}
  .grid-3{grid-template-columns:1fr}
  .price-pop{transform:none}
  .feat-sec,.how-sec,.price-sec,.faq-sec{padding:56px 0}
  .compare,.cmp-layer canvas{max-height:340px}
  .actions{flex-direction:column;align-items:stretch}
  .action-btns{margin-inline-start:0}
  .action-btns .btn{flex:1}
  .foot-inner{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}}
[dir=rtl] .cmp-tag-l{left:auto;right:10px}
[dir=rtl] .cmp-tag-r{right:auto;left:10px}