*{box-sizing:border-box}
body{margin:0;background:#f3efe6;font-family:-apple-system,"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;color:#1f2937}
header{display:flex;align-items:baseline;gap:16px;padding:14px 22px;background:#7f1d1d;color:#fff}
header h1{margin:0;font-size:22px}header span{opacity:.85;font-size:14px}
main{display:grid;grid-template-columns:360px 1fr;gap:18px;padding:18px 22px}
aside{display:flex;flex-direction:column;gap:12px}
.step{background:#fff;border-radius:14px;padding:14px 16px;box-shadow:0 2px 8px #0000000d}
.step h2{margin:0 0 10px;font-size:16px;display:flex;align-items:center;gap:8px}
.step h2 em{font-style:normal;width:24px;height:24px;border-radius:50%;background:#b91c1c;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:14px}
.step h2 small{font-weight:400;color:#6b7280;font-size:12px;margin-left:auto}
.pick{display:block;border:2px dashed #d6c7a8;border-radius:10px;padding:10px;text-align:center;font-size:14px;color:#57534e;cursor:pointer}
.pick input{display:none}
button{border:0;border-radius:10px;background:#b91c1c;color:#fff;font-size:15px;font-weight:700;padding:10px 12px;cursor:pointer}
button:disabled{background:#d6d3d1;cursor:not-allowed}
button.ghost{background:#fff;color:#b91c1c;border:1.5px solid #b91c1c;width:100%;margin-top:8px;padding:7px}
.info{font-size:13px;color:#57534e;margin:8px 0 0;line-height:1.6}
.f{display:grid;grid-template-columns:auto 1fr 64px 40px 40px;gap:6px;align-items:center;padding:6px 0;border-top:1px solid #f1ede4;font-size:14px}
.f input[type=number]{width:64px;padding:4px}.f input[type=color]{width:40px;height:30px;padding:0;border:0;background:none}
.f select{padding:3px}
.row{display:flex;gap:8px;align-items:center;font-size:14px}.row input{flex:1;padding:7px;border:1px solid #d6d3d1;border-radius:8px;font-size:14px}
.btns{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}
.bar{height:10px;background:#eee;border-radius:5px;overflow:hidden;margin-top:12px}.bar i{display:block;height:100%;width:0;background:#b91c1c;transition:width .1s}
.stage{background:#fff;border-radius:14px;padding:14px;box-shadow:0 2px 8px #0000000d;align-self:start}
.nav{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:10px}
.nav button{padding:6px 14px}.nav span{min-width:260px;text-align:center;font-weight:700}
canvas{width:100%;height:auto;display:block;border-radius:6px;box-shadow:0 0 0 1px #e7e5e4;cursor:grab;background:repeating-conic-gradient(#f5f5f4 0 25%,#fff 0 50%) 0 0/20px 20px}
.tip{font-size:13px;color:#78716c;text-align:center;margin:10px 0 0}
@media (max-width:900px){main{grid-template-columns:1fr}}