:root{
  --bg:#f8fbff;
  --bg-soft:#f2f7fc;
  --bg-warm:#fffaf6;
  --card:#ffffff;
  --card-2:#fbfdff;
  --text:#182433;
  --muted:#607287;
  --line:rgba(24,36,51,.08);
  --accent:#ff8d36;
  --accent-2:#ff6f86;
  --accent-3:#ffd38a;
  --success:#2db77d;
  --shadow-sm:0 10px 24px rgba(19,42,70,.06);
  --shadow-md:0 18px 46px rgba(19,42,70,.08),0 2px 10px rgba(19,42,70,.04);
  --shadow-lg:0 28px 70px rgba(19,42,70,.10),0 10px 24px rgba(19,42,70,.05);
  --radius:24px;
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    radial-gradient(circle at 8% 0%,rgba(255,187,118,.16),transparent 25%),
    radial-gradient(circle at 92% 10%,rgba(255,128,154,.12),transparent 24%),
    radial-gradient(circle at 50% 100%,rgba(123,176,255,.09),transparent 28%),
    linear-gradient(180deg,#fcfdff 0%,#f6faff 55%,#f9fbfe 100%);
  color:var(--text);
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
.container{width:min(calc(100% - 36px),var(--max));margin:auto}
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(24,36,51,.06);
}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo img{width:186px;height:auto}
.nav-links{display:flex;align-items:center;gap:22px;color:#5d7086;font-size:14px;font-weight:650}
.nav-links a{transition:color .2s ease,opacity .2s ease}
.nav-links a:hover{color:var(--text)}
.nav-cta{
  padding:10px 16px;border-radius:999px;
  border:1px solid rgba(255,141,54,.18);
  background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(255,247,241,.98));
  color:#d96c11;
  box-shadow:var(--shadow-sm);
}
.hero{padding:78px 0 62px;position:relative;overflow:hidden}
.hero:before{
  content:"";position:absolute;left:-120px;bottom:-160px;width:420px;height:420px;border-radius:50%;
  background:rgba(255,157,77,.10);filter:blur(12px);pointer-events:none
}
.hero:after{
  content:"";position:absolute;right:-120px;top:-80px;width:360px;height:360px;border-radius:50%;
  background:rgba(255,111,134,.08);filter:blur(14px);pointer-events:none
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
  border:1px solid rgba(255,211,138,.45);
  background:rgba(255,255,255,.86);
  color:#ba6d0d;font-size:13px;font-weight:750;letter-spacing:.02em;
  box-shadow:var(--shadow-sm);
}
.eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:linear-gradient(135deg,var(--accent-3),var(--accent-2));box-shadow:0 0 14px rgba(255,141,54,.28)}
.hero-copy{text-align:center;max-width:840px;margin:0 auto 36px}
h1{font-size:clamp(42px,7vw,76px);line-height:1.02;letter-spacing:-.045em;margin:18px 0 18px}
.gradient-text{background:linear-gradient(90deg,#ffbf5f 0%,#ff9532 40%,#ff748d 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-copy p{font-size:18px;color:var(--muted);max-width:720px;margin:0 auto}
.converter{
  position:relative;max-width:980px;margin:34px auto 0;padding:20px;
  border:1px solid rgba(24,36,51,.06);border-radius:28px;
  background:linear-gradient(180deg,rgba(255,255,255,.95),rgba(250,252,255,.94));
  box-shadow:var(--shadow-lg);
}
.converter:before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:linear-gradient(120deg,rgba(255,211,138,.55),transparent 35%,rgba(255,111,134,.18));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.converter-label{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:12px;color:#2c4157;font-size:14px;font-weight:700}
.converter-label span:last-child{color:#7f92a8;font-weight:550}
.convert-row{display:grid;grid-template-columns:1fr 160px 160px;gap:12px}
.field,.select{
  width:100%;height:58px;border-radius:16px;border:1px solid rgba(24,36,51,.10);
  background:#fff;color:var(--text);outline:none;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.field{padding:0 18px}
.select{padding:0 14px;cursor:pointer}
.field::placeholder{color:#8ea0b3}
.field:focus,.select:focus{border-color:rgba(255,141,54,.55);box-shadow:0 0 0 4px rgba(255,141,54,.10)}
.convert-btn{
  height:58px;border:0;border-radius:16px;
  background:linear-gradient(135deg,#ffb050,#ff7c63 45%,#ff7188 100%);
  color:#fff;font-weight:850;cursor:pointer;
  box-shadow:0 14px 32px rgba(255,120,88,.22);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.convert-btn:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(255,120,88,.28);filter:saturate(1.02)}
.convert-note{display:flex;align-items:center;gap:9px;margin:13px 4px 0;color:#7d90a6;font-size:13px}
.convert-note b{color:#31465d}
.status{display:none;margin:14px 0 0;padding:12px 14px;border-radius:14px;background:rgba(45,183,125,.10);border:1px solid rgba(45,183,125,.18);color:#247e5a;font-size:14px}
.section{padding:78px 0}
.section.alt{background:linear-gradient(180deg,rgba(255,255,255,.45),rgba(244,248,253,.82));border-top:1px solid rgba(24,36,51,.04);border-bottom:1px solid rgba(24,36,51,.04)}
.section-head{max-width:720px;margin-bottom:36px}
.section-head.center{text-align:center;margin:0 auto 38px}
.kicker{font-size:13px;text-transform:uppercase;letter-spacing:.13em;color:#dc840f;font-weight:850}
h2{font-size:clamp(30px,2vw,48px);line-height:1.12;letter-spacing:-.035em;margin:8px 0 14px}
.section-head p,.intro-text{color:var(--muted);font-size:17px}
.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}
.feature-panel{padding:28px;border-radius:var(--radius);background:linear-gradient(180deg,#ffffff,#fbfdff);border:1px solid var(--line);box-shadow:var(--shadow-md)}
.mini-list{display:grid;gap:14px}
.mini-item{display:flex;gap:13px;align-items:flex-start;padding:15px;border-radius:18px;background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(249,252,255,.95));border:1px solid rgba(24,36,51,.05);box-shadow:0 8px 20px rgba(31,58,90,.04)}
.mini-icon{flex:0 0 38px;width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(255,176,80,.20),rgba(255,113,136,.12));border:1px solid rgba(255,176,80,.22);font-size:18px}
.mini-item strong{display:block;margin-bottom:3px}
.mini-item span{color:#6f8297;font-size:14px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{position:relative;padding:28px;border-radius:22px;background:linear-gradient(180deg,#ffffff,#fbfdff);border:1px solid var(--line);min-height:230px;box-shadow:var(--shadow-md);transition:transform .2s ease,box-shadow .2s ease}
.step:hover{transform:translateY(-4px);box-shadow:0 24px 54px rgba(19,42,70,.10),0 8px 18px rgba(19,42,70,.05)}
.step-num{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#ffb052,#ff7188);color:#fff;font-weight:900;margin-bottom:34px;box-shadow:0 12px 24px rgba(255,118,102,.18)}
.step h3{font-size:20px;margin:0 0 8px}
.step p{margin:0;color:var(--muted);font-size:15px}
.benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.benefit{padding:24px;border-radius:20px;background:linear-gradient(180deg,#ffffff,#fcfdff);border:1px solid var(--line);box-shadow:var(--shadow-md);transition:transform .2s ease,box-shadow .2s ease}
.benefit:hover{transform:translateY(-3px);box-shadow:0 24px 54px rgba(19,42,70,.09),0 8px 18px rgba(19,42,70,.05)}
.benefit-icon{font-size:24px;margin-bottom:13px}
.benefit h3{margin:0 0 8px;font-size:18px}
.benefit p{margin:0;color:var(--muted);font-size:14px}
.faqs{max-width:860px;margin:auto;display:grid;gap:12px}
.faq{border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;list-style:none;padding:20px 22px;font-weight:750;display:flex;justify-content:space-between;gap:18px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";font-size:24px;color:#f0952c;font-weight:400;line-height:1}
.faq[open] summary:after{content:"−"}
.faq p{margin:0;padding:0 22px 20px;color:var(--muted);font-size:15px}
.cta{padding:34px;border-radius:28px;background:linear-gradient(115deg,rgba(255,176,80,.12),rgba(255,113,136,.08)),#fff;border:1px solid rgba(255,176,80,.18);display:flex;align-items:center;justify-content:space-between;gap:24px;box-shadow:var(--shadow-lg)}
.cta h2{font-size:32px;margin:0 0 8px}
.cta p{margin:0;color:var(--muted)}
.cta a{display:inline-flex;padding:13px 18px;border-radius:14px;background:linear-gradient(135deg,#24364b,#2f4760);color:#fff;font-weight:850;white-space:nowrap;box-shadow:var(--shadow-sm)}
.site-footer{border-top:1px solid rgba(24,36,51,.06);padding:34px 0 26px;background:rgba(255,255,255,.88)}
.footer-top{display:flex;justify-content:space-between;gap:28px;align-items:center;padding-bottom:24px}
.footer-brand{max-width:430px}.footer-brand img{width:150px;margin-bottom:10px}.footer-brand p{color:#6e8299;margin:0;font-size:13px}
.footer-links{display:flex;flex-wrap:wrap;gap:18px;color:#65788e;font-size:13px}
.footer-links a:hover{color:var(--text)}
.footer-bottom{padding-top:18px;border-top:1px solid rgba(24,36,51,.06);display:flex;justify-content:space-between;gap:20px;color:#6f8297;font-size:12px}
.page-hero{padding:64px 0 28px}
.page-hero h1{font-size:clamp(38px,6vw,62px);margin-bottom:14px}
.page-hero p{max-width:760px;color:var(--muted);font-size:17px}
.content-card{max-width:900px;margin:0 auto 80px;padding:36px;border:1px solid var(--line);border-radius:26px;background:#fff;box-shadow:var(--shadow-lg)}
.content-card h2{font-size:28px;margin-top:34px}.content-card h2:first-child{margin-top:0}.content-card h3{font-size:19px;margin-top:26px}.content-card p,.content-card li{color:#5f7187}.content-card ul{padding-left:22px}.content-card a{color:#de7a00;text-decoration:underline;text-decoration-color:rgba(222,122,0,.28)}
.notice{padding:16px 18px;border-radius:16px;background:rgba(255,211,138,.14);border:1px solid rgba(255,211,138,.26);color:#9b6812;margin:18px 0}
.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px}
.contact-box{padding:24px;border-radius:20px;background:linear-gradient(180deg,#ffffff,#fbfdff);border:1px solid var(--line);box-shadow:var(--shadow-md)}
.form-grid{display:grid;gap:14px}
.form-grid label{font-size:13px;color:#52657b;font-weight:750}
.form-grid input,.form-grid select,.form-grid textarea{width:100%;padding:14px 15px;border-radius:14px;border:1px solid rgba(24,36,51,.10);background:#fff;color:var(--text);outline:none;transition:border-color .2s ease,box-shadow .2s ease}
.form-grid input::placeholder,.form-grid textarea::placeholder{color:#90a1b4}
.form-grid textarea{min-height:150px;resize:vertical}
.form-grid input:focus,.form-grid select:focus,.form-grid textarea:focus{border-color:rgba(255,141,54,.55);box-shadow:0 0 0 4px rgba(255,141,54,.10)}
.submit-btn{justify-self:start;border:0;border-radius:14px;padding:13px 18px;background:linear-gradient(135deg,#ffb050,#ff7188);color:#fff;font-weight:850;cursor:pointer;box-shadow:0 12px 28px rgba(255,118,102,.18)}
.small{font-size:13px;color:#74889e}
@media(max-width:860px){
  .nav-links a:not(.nav-cta){display:none}
  .convert-row{grid-template-columns:1fr 140px}
  .convert-btn{grid-column:1/-1}
  .intro-grid,.contact-grid{grid-template-columns:1fr}
  .steps,.benefits{grid-template-columns:1fr}
  .footer-top,.footer-bottom,.cta{align-items:flex-start;flex-direction:column}
  .section{padding:62px 0}
}
@media(max-width:560px){
  .container{width:min(calc(100% - 24px),var(--max))}
  .nav{height:70px}
  .logo img{width:150px}
  .hero{padding:54px 0 46px}
  .convert-row{grid-template-columns:1fr}
  .convert-btn{grid-column:auto}
  .converter{padding:14px;border-radius:22px}
  .converter-label{align-items:flex-start;flex-direction:column;gap:3px}
  .content-card{padding:24px;margin-bottom:54px}
  .page-hero{padding-top:46px}
}

/* Feature panel enhancements */
.feature-panel .mini-list{grid-template-columns:1fr;gap:12px}
.feature-panel .mini-item{transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.feature-panel .mini-item:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(31,58,90,.07);border-color:rgba(255,141,54,.12)}

/* Full-width auto-sliding feature sections */
.feature-showcase{position:relative;overflow:hidden}
.feature-showcase .intro-grid{gap:56px}
.feature-copy{margin-bottom:0}
.feature-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.feature-points span{display:inline-flex;align-items:center;padding:9px 12px;border-radius:999px;background:#fff;border:1px solid rgba(24,36,51,.07);box-shadow:0 7px 18px rgba(19,42,70,.04);color:#53677d;font-size:13px;font-weight:700}
.intro-grid-reverse{grid-template-columns:.95fr 1.05fr}

.auto-slider{min-width:0;position:relative;padding:14px;border-radius:30px;background:linear-gradient(145deg,rgba(255,255,255,.98),rgba(248,251,255,.96));border:1px solid rgba(24,36,51,.06);box-shadow:var(--shadow-lg)}
.safe-slider{background:linear-gradient(145deg,#fffdfa,#fff7f2)}
.fast-slider{background:linear-gradient(145deg,#fbfdff,#f2f8ff)}
.auto-slider-window{overflow:hidden;border-radius:22px}
.auto-slider-track{display:flex;transition:transform .65s cubic-bezier(.22,.8,.24,1);will-change:transform}
.auto-slide{flex:0 0 100%;min-height:350px;padding:34px;display:flex;flex-direction:column;justify-content:center;background:rgba(255,255,255,.72)}
.auto-slide h3{font-size:27px;line-height:1.2;letter-spacing:-.02em;margin:8px 0 10px}
.auto-slide p{margin:0 0 24px;color:var(--muted);font-size:15px;max-width:480px}
.showcase-icon{width:52px;height:52px;border-radius:17px;display:grid;place-items:center;margin-bottom:16px;font-size:25px;background:linear-gradient(135deg,rgba(255,176,80,.22),rgba(255,113,136,.15));border:1px solid rgba(255,160,86,.20);box-shadow:0 9px 22px rgba(255,124,87,.10)}
.fast-slider .showcase-icon{background:linear-gradient(135deg,rgba(102,167,255,.17),rgba(91,127,255,.11));border-color:rgba(89,145,237,.16);box-shadow:0 9px 22px rgba(61,112,190,.09)}
.slide-label{font-size:12px;font-weight:850;text-transform:uppercase;letter-spacing:.12em;color:#d98620}
.fast-slider .slide-label{color:#527fc0}
.slider-dots{display:flex;justify-content:center;gap:8px;padding:14px 4px 3px}
.slider-dot{width:8px;height:8px;border:0;padding:0;border-radius:999px;background:#cbd5e1;cursor:pointer;transition:width .25s ease,background .25s ease}
.slider-dot.active{width:25px;background:linear-gradient(90deg,#ffad4f,#ff7389)}
.fast-slider .slider-dot.active{background:linear-gradient(90deg,#73b5ff,#687be9)}

.mock-browser{height:54px;padding:9px 10px;display:flex;align-items:center;gap:6px;border-radius:15px;background:#f5f7fa;border:1px solid rgba(24,36,51,.07)}
.mock-browser>span{width:8px;height:8px;border-radius:50%;background:#d6dde6}.mock-browser>span:nth-child(1){background:#ff9b8d}.mock-browser>span:nth-child(2){background:#ffd17a}.mock-browser>span:nth-child(3){background:#8ed8ae}
.mock-url{margin-left:4px;flex:1;padding:7px 10px;border-radius:9px;background:#fff;color:#8090a3;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mock-action-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mock-action{padding:13px 14px;border-radius:13px;text-align:center;background:#f4f6f9;border:1px solid rgba(24,36,51,.06);color:#64778d;font-weight:750;font-size:13px}.mock-action.primary{background:linear-gradient(135deg,#ffb050,#ff7188);color:white;border:0}
.mock-download{display:flex;align-items:center;gap:12px;padding:14px;border-radius:16px;background:#fff;border:1px solid rgba(24,36,51,.07);box-shadow:0 10px 25px rgba(19,42,70,.06)}.mock-file-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#fff3e9;font-size:20px}.mock-download>div:nth-child(2){display:flex;flex-direction:column;min-width:0;flex:1}.mock-download strong{font-size:14px}.mock-download span{font-size:12px;color:#8b9bad}.mock-download>b{font-size:12px;color:#d86e13;background:#fff5ec;padding:8px 10px;border-radius:10px}
.speed-meter{height:13px;border-radius:999px;background:#eaf0f6;overflow:hidden;margin-top:5px}.speed-meter span{display:block;height:100%;width:var(--speed);border-radius:inherit;background:linear-gradient(90deg,#79bfff,#6577eb);animation:speedPulse 2.2s ease-in-out infinite alternate}.speed-meta{display:flex;justify-content:space-between;margin-top:10px;color:#8292a4;font-size:12px;font-weight:700}
.bitrate-pills{display:flex;flex-wrap:wrap;gap:9px}.bitrate-pills span{padding:9px 12px;border-radius:12px;background:#f2f5f9;color:#718499;font-size:12px;font-weight:750}.bitrate-pills .active{background:linear-gradient(135deg,#79bfff,#6678eb);color:white}
.progress-demo{padding:16px;border-radius:16px;background:#fff;border:1px solid rgba(24,36,51,.07)}.progress-line{height:8px;border-radius:99px;background:#e8eef5;overflow:hidden}.progress-line span{display:block;width:82%;height:100%;border-radius:99px;background:linear-gradient(90deg,#79bfff,#6678eb);animation:progressGlow 1.7s ease-in-out infinite alternate}.progress-copy{display:flex;justify-content:space-between;margin-top:10px;font-size:12px}.progress-copy span{color:#8b9bad}
@keyframes speedPulse{from{width:72%}to{width:96%}}
@keyframes progressGlow{from{opacity:.72}to{opacity:1}}
@media (prefers-reduced-motion:reduce){.auto-slider-track{transition:none}.speed-meter span,.progress-line span{animation:none}}
@media(max-width:860px){.feature-showcase .intro-grid,.intro-grid-reverse{grid-template-columns:1fr;gap:30px}.fast-download-section .auto-slider{order:2}.fast-download-section .feature-copy{order:1}.auto-slide{min-height:320px}}
@media(max-width:560px){.auto-slider{padding:10px;border-radius:24px}.auto-slider-window{border-radius:18px}.auto-slide{padding:24px;min-height:330px}.auto-slide h3{font-size:23px}.mock-action-row{grid-template-columns:1fr}.feature-points{gap:8px}}