:root{color-scheme:light;--ink:#10213a;--muted:#63728a;--line:#dbe5f2;--blue:#1769e0;--blue-dark:#0e55bd;--pale:#f3f7fd;--white:#fff;--danger:#c93434;--success:#17834b;--radius:8px;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#f6f9fd;line-height:1.6;letter-spacing:0;user-select:text}
button,input{font:inherit;letter-spacing:0}
button{cursor:pointer}
.site-header{height:58px;padding:0 max(24px,calc((100% - 1320px)/2));display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid #e6edf7}
.brand{color:var(--ink);font-size:20px;font-weight:800;text-decoration:none}
.account-nav{display:flex;align-items:center;gap:18px;font-size:14px}
.text-button{border:0;background:transparent;color:#44536a;padding:8px 0}
.login-button{border:1px solid #b8cbe5;background:#fff;color:var(--blue);padding:7px 18px;border-radius:6px;font-weight:700}
.hero{background:#eaf3ff;border-bottom:1px solid #d9e8fb}
.hero-inner{max-width:1320px;margin:auto;padding:18px 24px 14px;text-align:center}
.eyebrow{margin:0 0 8px;color:var(--blue);font-size:14px;font-weight:700}
h1{margin:0;font-size:36px;line-height:1.25;font-weight:900}
.hero-copy{max-width:760px;margin:10px auto 0;color:#536782;font-size:15px}
.page-shell{max-width:1320px;margin:0 auto;padding:10px 24px 24px}
.generator,.results,.case-group{background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.generator{padding:16px 24px}
.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:14px}
.section-heading h2,.showcase-heading h2,.dialog-head h2{margin:0;font-size:24px;line-height:1.35}
.section-heading p,.showcase-heading p{margin:4px 0 0;color:var(--muted);font-size:14px}
.balance{padding:5px 12px;background:#edf5ff;color:#155dbb;border-radius:5px;font-size:14px;white-space:nowrap}
.work-grid{display:grid;grid-template-columns:minmax(430px,1.05fr) minmax(430px,.95fr);gap:30px}
.field-label{display:block;margin-bottom:8px;font-size:14px;font-weight:700;color:#253750}
.field-label b{color:var(--danger)}
.field-label em{font-style:normal;font-weight:400;color:#8794a6}
.drop-zone{height:270px;border:1.5px dashed #9cb8dc;background:#f7faff;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative;transition:.18s border-color,.18s background}
.drop-zone:hover,.drop-zone.dragging,.drop-zone:focus{border-color:var(--blue);background:#eef6ff;outline:0}
.drop-zone img{width:100%;height:100%;object-fit:contain;background:#edf2f8}
.upload-copy{text-align:center;color:#50627a;padding:28px}
.upload-copy strong,.upload-copy span{display:block}
.upload-copy strong{font-size:17px;color:#244263;margin-bottom:6px}
.upload-copy span{font-size:14px}
.text-input{width:100%;height:42px;border:1px solid #cad7e8;border-radius:6px;padding:0 13px;color:var(--ink);background:#fff;outline:0}
.text-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(23,105,224,.1)}
.optional-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:10px}
.effects{border:0;padding:0;margin:10px 0 0}
.effect-option{min-height:54px;border:1px solid #d2deed;border-radius:6px;padding:7px 13px;display:grid;grid-template-columns:20px 1fr auto;align-items:center;gap:10px;margin-top:7px;background:#fff}
.effect-option.active{border-color:#75a7e9;background:#f5f9ff}
.effect-option input{width:17px;height:17px;accent-color:var(--blue)}
.effect-option strong,.effect-option small{display:block}
.effect-option strong{font-size:15px}
.effect-option small{color:var(--muted);font-size:13px}
.effect-option i{font-style:normal;color:var(--blue);font-size:13px;white-space:nowrap}
.form-footer{display:flex;align-items:center;justify-content:flex-end;gap:28px;margin-top:14px;padding-top:14px;border-top:1px solid #edf1f7}
.cost-line{margin:0;color:var(--muted);font-size:14px}
.cost-line strong{color:var(--ink);font-size:16px;margin:0 4px}
.cost-line span{margin-left:10px}
.primary-button{min-width:310px;height:50px;border:0;border-radius:6px;background:var(--blue);color:#fff;font-weight:800;font-size:17px}
.primary-button:hover{background:var(--blue-dark)}
.primary-button:disabled{cursor:wait;opacity:.65}
.message{margin:14px 0 0;padding:10px 12px;border-radius:5px;background:#fff1f1;color:var(--danger);font-size:14px}
.results{margin-top:22px;padding:24px 28px}
#resultStatus.working{color:var(--blue);font-size:20px;font-weight:800}
#resultStatus.working::after{content:"";display:inline-block;width:1.3em;text-align:left;animation:dots 1.4s steps(4,end) infinite}
@keyframes dots{0%{content:""}25%{content:"."}50%{content:".."}75%,100%{content:"..."}}
.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.result-card{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff}
.result-card header{padding:13px 15px}
.result-card h3,.result-card p{margin:0}
.result-card h3{font-size:17px}.result-card p{color:var(--muted);font-size:13px}
.result-card img{display:block;width:100%;aspect-ratio:16/10;object-fit:contain;background:#edf2f8}
.result-actions{display:flex;gap:10px;padding:12px 15px}
.result-actions button{height:38px;border:1px solid #b8cbe5;border-radius:5px;background:#fff;color:#275178;padding:0 18px}
.showcase{margin-top:48px}
.showcase-heading{text-align:center;margin-bottom:20px}
.case-list{display:grid;gap:20px}
.case-group{padding:22px}
.case-info{text-align:center;margin-bottom:16px}
.case-info h3{margin:0;font-size:20px}.case-info p{margin:4px 0 0;color:var(--muted);font-size:14px}
.case-images{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.case-images figure{margin:0;border:1px solid #dbe5f2;border-radius:6px;overflow:hidden;background:#f5f8fc}
.case-images img{display:block;width:100%;aspect-ratio:16/10;object-fit:cover}
.case-images figcaption{text-align:center;padding:8px;font-size:14px;font-weight:700;background:#fff}
.empty-state{text-align:center;color:var(--muted)}
.seo-content{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin:48px 0 30px;padding:30px 0;border-top:1px solid #dbe5f2}
.seo-content h2{font-size:18px;margin:0 0 8px}.seo-content p{font-size:14px;color:var(--muted);margin:0}
.history-dialog{width:min(900px,calc(100% - 32px));max-height:80vh;border:0;border-radius:8px;padding:0;box-shadow:0 18px 55px rgba(18,35,60,.25)}
.history-dialog::backdrop{background:rgba(12,25,45,.45)}
.dialog-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--line)}
.dialog-head button{border:0;background:transparent;font-size:28px;color:#526279}
.history-list{padding:20px;display:grid;gap:12px;overflow:auto}
.history-item{display:flex;justify-content:space-between;gap:16px;border:1px solid var(--line);padding:13px;border-radius:6px}
.history-item p{margin:0;color:var(--muted);font-size:13px}

@media(max-width:900px){
  .site-header{height:56px;padding:0 16px}.hero-inner{padding:26px 18px 23px}h1{font-size:30px}.hero-copy{font-size:15px;margin-top:10px}
  .page-shell{padding:14px}.generator,.results{padding:18px}.work-grid{grid-template-columns:1fr;gap:20px}.drop-zone{height:270px}
  .optional-grid{grid-template-columns:1fr}.form-footer{align-items:stretch;flex-direction:column;gap:12px}.primary-button{min-width:0;width:100%}.cost-line{text-align:center}
  .result-grid{grid-template-columns:1fr}.case-images{grid-template-columns:1fr}.case-group{padding:14px}.seo-content{grid-template-columns:1fr;gap:22px}.showcase{margin-top:34px}
}
@media(max-width:480px){.eyebrow{display:none}h1{font-size:27px}.hero-copy{font-size:14px}.section-heading h2,.showcase-heading h2{font-size:21px}.balance{font-size:12px}.drop-zone{height:230px}.account-nav{gap:10px}.case-info h3{font-size:17px}}