:root{
  --bg:#f5f6fa;
  --card:#ffffff;
  --text:#171a25;
  --muted:#6b7280;
  --line:#e8eaf2;
  --brand:#4f46e5;
  --brand-soft:#eef0ff;
  --brand-2:#7c3aed;
  --ok:#16a34a;
  --warn:#d97706;
  --err:#dc2626;
  --radius:16px;
  --shadow:0 1px 2px rgba(20,24,40,.04), 0 8px 24px rgba(20,24,40,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font:15px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-.02em}
button,input,select{font:inherit;color:inherit}
.hidden{display:none !important}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700}
.logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800;letter-spacing:.5px}
.logo-text{font-size:16px}
.nav-links{display:flex;gap:18px;margin-left:8px}
.nav-links a{color:var(--muted);font-size:14px;padding:4px 0;border-bottom:2px solid transparent}
.nav-links a.active,.nav-links a:hover{color:var(--text);border-color:var(--brand)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.points-chip{display:inline-flex;align-items:center;gap:6px;background:var(--brand-soft);color:var(--brand);border-radius:999px;padding:6px 12px;font-size:13px;font-weight:600}
.points-chip .dot{width:6px;height:6px;border-radius:50%;background:var(--brand)}
.user-chip{display:inline-flex;align-items:center;gap:8px;font-size:14px}
.avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,#a5b4fc,#c4b5fd);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700}

/* ---------- layout ---------- */
main{max-width:1080px;margin:0 auto;padding:28px 20px 60px;display:flex;flex-direction:column;gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.card-head h2{font-size:17px}
.sub-title{font-size:14px;margin:0 0 10px;color:var(--muted);font-weight:600}

/* ---------- hero ---------- */
.hero{padding:34px 24px 30px;text-align:center;background:linear-gradient(135deg,#fff 0%,#f3f2ff 55%,#eef4ff 100%);border:1px solid var(--line);border-radius:20px}
.hero h1{font-size:30px;margin-bottom:10px}
.hero-sub{color:var(--muted);max-width:640px;margin:0 auto}
.hero-tags{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:16px}
.tag{background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:12.5px;color:var(--muted)}
.engine-state{margin-top:18px;font-size:12.5px;color:var(--muted)}
.engine-state b{color:var(--text)}

/* ---------- dropzone ---------- */
.drop{border:2px dashed #d6d9e6;border-radius:14px;padding:44px 20px;text-align:center;cursor:pointer;transition:.18s;background:#fcfcff}
.drop:hover,.drop.over{border-color:var(--brand);background:var(--brand-soft)}
.drop-icon{width:46px;height:46px;margin:0 auto 12px;border-radius:14px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:26px;font-weight:600}
.drop-title{font-weight:600}
.drop-sub{color:var(--muted);font-size:13px;margin-top:4px}

/* ---------- stage ---------- */
.stage{display:grid;grid-template-columns:1fr 300px;gap:22px}
.stage-preview{background:#f8f9fc;border:1px solid var(--line);border-radius:12px;min-height:280px;display:grid;place-items:center;padding:14px;overflow:hidden}
.stage-preview img{max-width:100%;max-height:380px;object-fit:contain;border-radius:8px}
.stage-info{display:flex;flex-direction:column;gap:14px}
.info-row{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px}
.info-row>span:first-child{color:var(--muted)}
.info-row b{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:150px}
.seg{display:inline-flex;background:#f1f2f7;border-radius:10px;padding:3px}
.seg button{border:0;background:transparent;padding:6px 12px;border-radius:8px;cursor:pointer;color:var(--muted);font-size:13px}
.seg button.on{background:#fff;color:var(--text);font-weight:600;box-shadow:0 1px 3px rgba(0,0,0,.08)}
select{border:1px solid var(--line);background:#fff;border-radius:10px;padding:7px 10px;font-size:13.5px;max-width:170px}
.cost-box{background:#fafaff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:6px}
.cost-line{display:flex;align-items:center;gap:6px;font-size:13.5px;color:var(--muted)}
.cost-line b{color:var(--text);font-size:15px}
.cost-line .cost-num{color:var(--brand);font-size:20px;font-weight:800}
.cost-line.sub{opacity:.85}

/* ---------- buttons ---------- */
.btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 16px;cursor:pointer;font-size:14px;font-weight:500;transition:.15s;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.btn:hover{border-color:#c9cce0}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:#4338ca}
.btn.ghost{background:#fff}
.btn.block{width:100%}
.btn.tiny{padding:5px 12px;font-size:13px}
.btn:disabled{opacity:.55;cursor:not-allowed}

/* ---------- progress ---------- */
.progress{display:flex;align-items:center;gap:14px;background:#fafaff;border:1px solid var(--line);border-radius:12px;padding:18px}
.spinner{width:26px;height:26px;border:3px solid #e3e5f0;border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite;flex:none}
@keyframes spin{to{transform:rotate(360deg)}}
.prog-title{font-weight:600}
.prog-sub{color:var(--muted);font-size:13px}

/* ---------- result ---------- */
.result-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.r-title{font-weight:700;font-size:16px}
.r-sub{color:var(--muted);font-size:13px}
.r-actions{display:flex;gap:8px}
.compare{position:relative;background:#f8f9fc;border:1px solid var(--line);border-radius:12px;overflow:hidden;height:420px;cursor:ew-resize;user-select:none;touch-action:none}
.compare img{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);max-width:100%;max-height:100%;object-fit:contain;pointer-events:none}
.cmp-in{clip-path:inset(0 50% 0 0)}
.cmp-handle{position:absolute;top:0;bottom:0;width:2px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.15);left:50%;transform:translateX(-1px);pointer-events:none}
.cmp-handle span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.18);display:grid;place-items:center}
.cmp-handle span::after{content:"⇄";font-size:14px;color:var(--brand)}
.cmp-label{position:absolute;top:10px;background:rgba(23,26,37,.62);color:#fff;font-size:12px;padding:3px 10px;border-radius:999px;pointer-events:none}
.cmp-label.left{left:10px}.cmp-label.right{right:10px}
.compare-tip{text-align:center;color:var(--muted);font-size:12.5px;margin-top:8px}
.notice{margin-top:10px;background:#fffbeb;border:1px solid #fde68a;color:#92400e;border-radius:10px;padding:10px 12px;font-size:13px}

/* ---------- records ---------- */
.records{display:flex;flex-direction:column;gap:10px}
.rec{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.rec img{width:56px;height:56px;object-fit:cover;border-radius:8px;background:#f1f2f7;flex:none}
.rec-main{flex:1;min-width:0}
.rec-name{font-weight:600;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rec-meta{color:var(--muted);font-size:12.5px}
.rec-right{display:flex;align-items:center;gap:8px;flex:none}
.badge{font-size:12px;padding:3px 9px;border-radius:999px;font-weight:600}
.badge.done{background:#dcfce7;color:#15803d}
.badge.running,.badge.queued{background:#e0e7ff;color:#4338ca}
.badge.failed{background:#fee2e2;color:#b91c1c}
.empty{color:var(--muted);font-size:13.5px;padding:18px;text-align:center;background:#fafbfd;border:1px dashed var(--line);border-radius:12px}

/* ---------- billing ---------- */
.billing-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:26px}
.pkgs{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.pkg{border:1px solid var(--line);border-radius:12px;padding:14px;position:relative;transition:.15s;background:#fff}
.pkg:hover{border-color:var(--brand);box-shadow:0 6px 18px rgba(79,70,229,.10)}
.pkg.hot{border-color:var(--brand);background:linear-gradient(180deg,#f7f7ff,#fff)}
.pkg-tag{position:absolute;top:-9px;right:10px;background:var(--brand);color:#fff;font-size:11px;padding:2px 8px;border-radius:999px}
.pkg-name{font-weight:700}
.pkg-points{font-size:22px;font-weight:800;color:var(--brand);margin:4px 0}
.pkg-points small{font-size:12px;font-weight:500;color:var(--muted)}
.pkg-price{font-size:15px;font-weight:700}
.pkg-desc{color:var(--muted);font-size:12.5px;margin:4px 0 10px;min-height:18px}
.hint{color:var(--muted);font-size:12.5px;margin-top:10px}
.logs{display:flex;flex-direction:column;gap:8px;max-height:330px;overflow:auto}
.log{display:flex;justify-content:space-between;gap:10px;font-size:13px;border-bottom:1px dashed var(--line);padding-bottom:8px}
.log .d{font-weight:700}
.log .d.plus{color:var(--ok)}
.log .d.minus{color:var(--err)}
.log .t{color:var(--muted);font-size:12px}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;background:rgba(20,24,40,.45);display:none;place-items:center;z-index:60;padding:20px}
.modal.show{display:grid}
.modal-box{background:#fff;border-radius:16px;padding:24px;width:300px;max-width:100%;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.modal-box.narrow{width:340px}
.modal-x{position:absolute;top:6px;right:6px;border:0;background:transparent;cursor:pointer;color:var(--muted);font-size:15px}
.modal-title{font-size:17px;margin-bottom:14px}
.tabs{display:flex;gap:6px;background:#f1f2f7;border-radius:10px;padding:3px;margin-bottom:16px}
.tabs button{flex:1;border:0;background:transparent;padding:8px;border-radius:8px;cursor:pointer;color:var(--muted)}
.tabs button.on{background:#fff;color:var(--text);font-weight:600;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.field{display:block;margin-bottom:12px}
.field span{display:block;font-size:13px;color:var(--muted);margin-bottom:5px}
.field input{width:100%;border:1px solid var(--line);border-radius:10px;padding:9px 12px;outline:none}
.field input:focus{border-color:var(--brand)}
.err{background:#fee2e2;color:#b91c1c;border-radius:9px;padding:8px 11px;font-size:13px;margin-bottom:10px}
.modal-tip{color:var(--muted);font-size:12.5px;text-align:center;margin:12px 0 0}
.pay-info{background:#fafaff;border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:14px}
.pay-info .row{display:flex;justify-content:space-between;font-size:14px;padding:3px 0}
.pay-info .row b{font-weight:700}
.pay-method{margin-bottom:14px}
.pm{border:1px solid var(--brand);background:var(--brand-soft);color:var(--brand);border-radius:10px;padding:10px 12px;font-size:13.5px;font-weight:600}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:#171a25;color:#fff;padding:11px 18px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:.22s;z-index:80;max-width:80vw;text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- footer ---------- */
.foot{text-align:center;color:var(--muted);font-size:12.5px;padding:24px 20px 40px}

@media (max-width:860px){
  .stage{grid-template-columns:1fr}
  .billing-grid{grid-template-columns:1fr}
  .pkgs{grid-template-columns:1fr}
  .nav-links{display:none}
  .hero h1{font-size:24px}
  .compare{height:300px}
}