*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#ea580c;
  --primary-dark:#c2410c;
  --primary-soft:#fff7ed;
  --bg:#f8fafc;
  --card:#fff;
  --border:#e2e8f0;
  --text:#0f172a;
  --muted:#64748b;
  --success:#16a34a;
  --success-bg:#f0fdf4;
  --warn:#92400e;
  --warn-bg:#fffbeb;
  --shadow:0 18px 40px rgba(15,23,42,.06);
}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  background:
    radial-gradient(circle at top left,rgba(254,215,170,.45),transparent 28%),
    linear-gradient(180deg,#fffaf5 0%,var(--bg) 240px);
  color:var(--text);
  line-height:1.6;
}
a{color:var(--primary);text-decoration:none}
button,input,select{font:inherit}
button{cursor:pointer}
img{max-width:100%;display:block}

.site-header{
  position:sticky;
  top:0;
  z-index:50;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:64px;
  padding:0 24px;
  background:rgba(255,255,255,.88);
  border-bottom:1px solid rgba(226,232,240,.9);
  backdrop-filter:blur(14px);
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-size:20px;
  font-weight:800;
}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:12px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg,var(--primary),#fb923c);
  color:#fff;
  font-size:18px;
  box-shadow:0 10px 20px rgba(234,88,12,.25);
}
.header-actions{display:flex;align-items:center;gap:12px}
.lang-btn{
  padding:8px 14px;
  border:1px solid var(--border);
  border-radius:999px;
  background:#fff;
  color:var(--muted);
  transition:.18s;
}
.lang-btn:hover{border-color:rgba(234,88,12,.3);color:var(--primary)}

.page{max-width:1200px;margin:0 auto;padding:24px}
.ad-slot{margin:18px auto;max-width:1200px;padding:0 24px;text-align:center;overflow:hidden}

.hero{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);
  gap:22px;
  align-items:stretch;
}
.hero-copy,.hero-panel,.card,.tool-card,.faq-card,.related-card{
  background:rgba(255,255,255,.88);
  border:1px solid rgba(226,232,240,.9);
  box-shadow:var(--shadow);
}
.hero-copy,.hero-panel,.card,.tool-card,.faq-card,.related-card{border-radius:24px}
.hero-copy{padding:30px}
.hero-kicker,.section-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  background:var(--primary-soft);
  color:var(--primary-dark);
  border:1px solid rgba(234,88,12,.16);
  font-size:12px;
  font-weight:800;
  letter-spacing:.05em;
  text-transform:uppercase;
}
.hero-title{font-size:clamp(36px,5vw,58px);line-height:1.02;letter-spacing:-.04em;margin:16px 0 14px;max-width:11ch}
.hero-desc{color:#7c2d12;max-width:62ch;font-size:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hero-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.hero-chip{
  padding:10px 12px;
  border-radius:999px;
  background:#fff;
  border:1px solid rgba(234,88,12,.12);
  color:var(--muted);
  font-size:13px;
}
.hero-panel{padding:24px}
.hero-panel h2{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--primary-dark);font-weight:800}
.hero-panel p{color:var(--muted);font-size:14px;margin-top:10px}
.hero-list{display:grid;gap:12px;margin-top:18px}
.hero-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:16px 18px;
  border-radius:18px;
  border:1px solid var(--border);
  background:#fff;
  color:var(--text);
  transition:.18s;
}
.hero-link:hover{transform:translateY(-1px);border-color:rgba(234,88,12,.32);box-shadow:0 12px 24px rgba(234,88,12,.08)}
.hero-link strong{font-size:13px;color:var(--primary-dark)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:none;
  border-radius:14px;
  padding:12px 18px;
  font-weight:700;
  transition:.18s;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-primary:disabled{opacity:.55;cursor:not-allowed}
.btn-secondary{background:#fff;border:1px solid rgba(234,88,12,.18);color:#9a3412}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}
.btn-download{background:var(--success);color:#fff}
.btn-download:hover{background:#15803d}

.section{margin-top:24px}
.section-head{display:flex;flex-direction:column;gap:10px;margin-bottom:18px}
.section-title{font-size:30px;line-height:1.08;letter-spacing:-.03em}
.section-desc{color:var(--muted);max-width:70ch}

.tool-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}
.tool-card{padding:22px;display:flex;flex-direction:column;gap:14px;min-height:230px}
.tool-badge{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  padding:6px 10px;
  border-radius:999px;
  background:var(--primary-soft);
  color:var(--primary-dark);
  font-size:12px;
  font-weight:800;
}
.tool-card h3{font-size:18px;line-height:1.2}
.tool-card p{color:var(--muted);font-size:14px}
.tool-card .tool-card-link{margin-top:auto;font-weight:800}

.tool-page-hero{padding:24px 0 8px}
.tool-page-title{font-size:clamp(32px,4vw,48px);line-height:1.02;letter-spacing:-.04em;max-width:12ch;margin-top:14px}
.tool-page-desc{margin-top:12px;color:#7c2d12;max-width:66ch}
.tool-benefits{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.tool-benefits span{
  padding:9px 12px;
  border-radius:999px;
  background:#fff;
  border:1px solid rgba(234,88,12,.12);
  color:var(--muted);
  font-size:13px;
}

.tool-shell{display:grid;grid-template-columns:280px minmax(0,1fr);gap:20px;align-items:start}
.tool-nav{
  position:sticky;
  top:88px;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:16px;
  border-radius:22px;
  background:rgba(255,255,255,.9);
  border:1px solid rgba(226,232,240,.9);
  box-shadow:var(--shadow);
}
.tool-nav-title{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:0 8px 6px}
.tool-nav-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 14px;
  border-radius:16px;
  color:var(--muted);
  transition:.18s;
}
.tool-nav-link:hover{background:var(--primary-soft);color:var(--primary)}
.tool-nav-link.active{background:var(--primary-soft);color:var(--primary);font-weight:700}
.tool-nav-mobile{
  display:none;
  gap:8px;
  overflow:auto;
  margin:18px 0 14px;
  padding-bottom:4px;
}
.tool-nav-mobile .tool-nav-link{
  flex-shrink:0;
  background:#fff;
  border:1px solid var(--border);
}

.tool-main{min-width:0}
.card{padding:24px}
.card + .card{margin-top:16px}
.card h3{font-size:15px;font-weight:700;margin-bottom:12px}
.card-muted{color:var(--muted);font-size:14px}
.upload-area{
  position:relative;
  padding:40px 20px;
  text-align:center;
  border:2px dashed var(--border);
  border-radius:18px;
  background:#fafafa;
  transition:.18s;
}
.upload-area:hover,.upload-area.dragover{border-color:var(--primary);background:var(--primary-soft)}
.upload-area input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}
.upload-icon{font-size:42px;margin-bottom:10px}
.upload-area p{color:var(--muted)}
.upload-area strong{color:var(--primary-dark)}
.helper-text{font-size:12px;color:#94a3b8;margin-top:6px}
.file-info{
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 14px;
  margin-top:14px;
  background:var(--success-bg);
  border:1px solid #bbf7d0;
  border-radius:14px;
  font-size:14px;
}
.file-info .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-info .remove,.file-list-item .remove{margin-left:auto;color:#ef4444;font-size:18px;cursor:pointer}
.file-list{display:grid;gap:8px}
.file-list-item{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border:1px solid var(--border);
  background:#f8fafc;
  border-radius:12px;
  font-size:13px;
}
.file-list-item .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.form-row{display:flex;flex-wrap:wrap;gap:16px}
.form-group{flex:1;min-width:180px}
.form-group label{display:block;margin-bottom:6px;font-size:13px;font-weight:700}
select,input[type=number],input[type=text],input[type=range]{
  width:100%;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:12px;
  background:#fff;
  color:var(--text);
}
select:focus,input:focus{outline:none;border-color:rgba(234,88,12,.35);box-shadow:0 0 0 3px rgba(234,88,12,.08)}
input[type=range]{padding:0;height:8px;-webkit-appearance:none;background:#e5e7eb}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--primary)}
.time-inputs{display:flex;align-items:center;gap:8px}
.time-inputs input{width:88px;text-align:center}
.range-hint{display:flex;justify-content:space-between;font-size:11px;color:#94a3b8;margin-top:4px}

.action-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.progress-wrap{display:none;margin-top:16px}
.progress-wrap.show{display:block}
.progress-bar{height:8px;background:#e5e7eb;border-radius:999px;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),#fb923c);width:0;transition:width .25s}
.progress-text{margin-top:6px;font-size:13px;color:var(--muted)}
.result-area{
  display:none;
  margin-top:16px;
  padding:16px;
  border:1px solid #bbf7d0;
  border-radius:18px;
  background:var(--success-bg);
  text-align:center;
}
.result-area.show{display:block}
.result-area p{margin-bottom:12px;color:#166534}

.notice{
  display:none;
  gap:10px;
  padding:12px 14px;
  margin-bottom:16px;
  background:var(--warn-bg);
  border:1px solid #fde68a;
  border-radius:16px;
  color:var(--warn);
  font-size:13px;
}

.faq-block,.related-block{margin-top:24px}
.faq-card,.related-card{padding:24px}
.faq-card details{border-bottom:1px solid var(--border);padding:12px 0}
.faq-card details:last-child{border-bottom:none}
.faq-card summary{cursor:pointer;font-weight:700;list-style:none}
.faq-card p{margin-top:8px;color:var(--muted);font-size:14px}
.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.related-links a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--border);
  color:var(--muted);
}
.related-links a:hover{border-color:rgba(234,88,12,.3);color:var(--primary)}

.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.step{
  padding:20px;
  border-radius:20px;
  background:rgba(255,255,255,.88);
  border:1px solid rgba(226,232,240,.9);
  box-shadow:var(--shadow);
}
.step strong{
  display:block;
  margin-bottom:10px;
  font-size:15px;
}
.step p{color:var(--muted);font-size:14px}
.embed-frame{
  width:100%;
  min-height:1180px;
  margin-top:18px;
  border:1px solid var(--border);
  border-radius:22px;
  background:#fff;
}
.cta-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:18px;
}
.tip{
  padding:12px 14px;
  border-radius:14px;
  background:var(--warn-bg);
  border:1px solid #fde68a;
  color:var(--warn);
  font-size:13px;
}

.footer{
  max-width:1200px;
  margin:40px auto 24px;
  padding:0 24px 24px;
}
.footer-inner{
  padding:22px 24px;
  border-radius:24px;
  background:#111827;
  color:#cbd5e1;
}
.footer-links,.footer-network{display:flex;flex-wrap:wrap;gap:12px}
.footer-links a,.footer-network a{color:#cbd5e1}
.footer-copy{margin-top:16px;font-size:13px;color:#94a3b8}

.modal-overlay{
  display:none;
  position:fixed;
  inset:0;
  z-index:80;
  background:rgba(15,23,42,.5);
  align-items:center;
  justify-content:center;
  padding:20px;
}
.modal-overlay.show{display:flex}
.modal{
  width:min(680px,100%);
  max-height:80vh;
  overflow:auto;
  padding:28px;
  border-radius:24px;
  background:#fff;
  box-shadow:0 24px 60px rgba(15,23,42,.18);
}
.modal h2{font-size:24px;margin-bottom:16px}
.modal p{color:var(--muted);margin-bottom:12px;font-size:14px}
.modal-close{
  float:right;
  border:none;
  background:none;
  font-size:24px;
  color:var(--muted);
}

.loading-overlay{
  display:none;
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(255,255,255,.9);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:16px;
}
.loading-overlay.show{display:flex}
.spinner{
  width:52px;
  height:52px;
  border:4px solid var(--border);
  border-top-color:var(--primary);
  border-radius:50%;
  animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

.browser-banner{
  display:none;
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:100;
  padding:14px 18px;
  text-align:center;
  color:#fff;
  background:linear-gradient(135deg,#1d4ed8,#3b82f6);
  box-shadow:0 6px 18px rgba(15,23,42,.18);
}
.browser-banner a{color:#fde68a;text-decoration:underline}
.browser-banner button{
  position:absolute;
  top:50%;
  right:12px;
  transform:translateY(-50%);
  border:none;
  background:none;
  color:#fff;
  font-size:20px;
}

@media(max-width:1100px){
  .tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tool-shell{grid-template-columns:1fr}
  .tool-nav{display:none}
  .tool-nav-mobile{display:flex}
}

@media(max-width:768px){
  .site-header{padding:0 16px}
  .page,.footer{padding-left:16px;padding-right:16px}
  .ad-slot{padding:0 16px}
  .hero{grid-template-columns:1fr}
  .hero-copy,.hero-panel,.card,.tool-card,.faq-card,.related-card,.footer-inner{border-radius:20px}
  .hero-copy,.hero-panel,.card,.faq-card,.related-card{padding:20px}
  .hero-title,.tool-page-title{max-width:none}
  .tool-grid{grid-template-columns:1fr}
  .form-group{min-width:100%}
  .steps{grid-template-columns:1fr}
  .embed-frame{min-height:980px}
}