*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:#f0f2f5;color:#333;line-height:1.6}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

.header{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);color:#fff;padding:40px 0 30px;text-align:center}
.logo{font-size:28px;font-weight:700;margin-bottom:8px}
.subtitle{font-size:14px;opacity:.7}

.filter-bar{background:#fff;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.08);padding:12px 0}
.filter-bar .container{display:flex;gap:8px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.filter-bar .container::-webkit-scrollbar{display:none}
.filter-btn{padding:8px 20px;border:1px solid #e0e0e0;border-radius:20px;background:#fff;cursor:pointer;font-size:14px;white-space:nowrap;transition:all .2s}
.filter-btn:hover{border-color:#1a73e8;color:#1a73e8}
.filter-btn.active{background:#1a73e8;color:#fff;border-color:#1a73e8}

.stats{padding:20px 0 10px;font-size:14px;color:#666}

.report-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:24px;padding:10px 0 40px}

.report-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);cursor:pointer;transition:all .3s;position:relative}
.report-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}

.thumb-wrapper{position:relative;width:100%;padding-top:130%;background:#f5f5f5;overflow:hidden}
.thumb-wrapper img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:contain;background:#fff}
.thumb-placeholder{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#999;font-size:13px}
.thumb-placeholder .icon{font-size:48px;margin-bottom:10px;opacity:.5}
.year-badge{position:absolute;top:8px;left:8px;background:rgba(0,0,0,.7);color:#fff;padding:3px 10px;border-radius:10px;font-size:11px;font-weight:600}

.report-info{padding:14px}
.report-title{font-size:13px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;min-height:58px}
.report-meta{display:flex;justify-content:space-between;align-items:center;margin-top:10px;font-size:12px;color:#999}
.price-tag{color:#e74c3c;font-weight:700;font-size:15px}

.loading{grid-column:1/-1;text-align:center;padding:60px;color:#999;font-size:16px}

.modal-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.6);z-index:1000;justify-content:center;align-items:center}
.modal-overlay.show{display:flex}
.modal{background:#fff;border-radius:16px;width:90%;max-width:700px;max-height:90vh;display:flex;flex-direction:column;animation:modalIn .3s ease}
@keyframes modalIn{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid #eee;flex-shrink:0}
.modal-header h3{font-size:16px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;margin-right:10px}
.modal-close{background:none;border:none;font-size:24px;cursor:pointer;color:#999;padding:0 4px;line-height:1}
.modal-close:hover{color:#333}
.modal-body{overflow-y:auto;flex:1;padding:20px}

.pdf-preview-container{display:flex;justify-content:center;background:#666;border-radius:8px;overflow:hidden;min-height:400px}
.pdf-preview-container canvas{max-width:100%;height:auto}

.pdf-nav{display:flex;justify-content:center;align-items:center;gap:20px;padding:16px 0}
.pdf-nav button{padding:8px 20px;border:1px solid #ddd;border-radius:6px;background:#fff;cursor:pointer;font-size:14px;transition:all .2s}
.pdf-nav button:hover:not(:disabled){background:#1a73e8;color:#fff;border-color:#1a73e8}
.pdf-nav button:disabled{opacity:.4;cursor:not-allowed}
#pageInfo{font-size:14px;color:#666}

.preview-limit{text-align:center;padding:20px 0 10px;border-top:1px solid #eee;margin-top:10px}
.preview-limit p{color:#666;margin-bottom:14px;font-size:14px}
.buy-btn{padding:14px 40px;background:linear-gradient(135deg,#e74c3c,#c0392b);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s}
.buy-btn:hover{transform:scale(1.02);box-shadow:0 4px 16px rgba(231,76,60,.4)}

.payment-modal{max-width:420px}
.payment-body{text-align:center;padding:30px 20px}
.report-icon{font-size:56px;margin-bottom:12px}
.payment-info h4{font-size:16px;margin-bottom:16px;line-height:1.5}
.price{font-size:36px;font-weight:700;color:#e74c3c;margin-bottom:8px}
.payment-hint{font-size:13px;color:#999;margin-bottom:24px}
.pay-btn{width:100%;padding:14px;background:linear-gradient(135deg,#07c160,#06ad56);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s}
.pay-btn:hover{box-shadow:0 4px 16px rgba(7,193,96,.4)}

.toast{position:fixed;bottom:80px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.8);color:#fff;padding:12px 24px;border-radius:8px;font-size:14px;z-index:2000;display:none;animation:toastIn .3s}
.toast.show{display:block}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}

@media(max-width:768px){
  .header{padding:24px 0 20px}
  .logo{font-size:22px}
  .report-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
  .modal{width:95%;border-radius:12px}
  .pdf-preview-container{min-height:280px}
  .buy-btn{padding:12px 30px;font-size:15px}
}
@media(max-width:480px){
  .report-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .report-info{padding:10px}
  .report-title{font-size:12px;min-height:48px;-webkit-line-clamp:2}
  .price-tag{font-size:13px}
}