.paper-page{min-height:100%}.paper-breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:18px;color:#9aa3b2;font-size:14px}.paper-breadcrumb strong{color:#2f3a4a;font-weight:var(--fw-medium)}.paper-filter-card{background:var(--bg-card);border:1px solid #edf0f5;border-radius:8px;box-shadow:var(--shadow-card);padding:24px 28px;margin-bottom:20px}.paper-filter-grid{display:grid;grid-template-columns:repeat(4,minmax(190px,1fr));gap:22px 28px}.paper-filter-item{display:grid;grid-template-columns:56px minmax(0,1fr);align-items:center;gap:12px;min-width:0}.paper-filter-item label{font-size:15px;color:#111827;font-weight:var(--fw-medium);white-space:nowrap}.paper-filter-item .form-select,.paper-filter-item .form-input{height:42px;min-width:0;border-color:#d8dde8;border-radius:5px;color:#64748b;font-size:14px}.paper-filter-actions{display:flex;align-items:center;gap:16px}.paper-filter-actions .btn{height:42px;min-width:78px;border-radius:5px;padding:0 20px}.paper-list-wrap{min-height:520px;position:relative;padding-bottom:58px}.paper-book-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.paper-book-card{min-height:258px;background:var(--bg-card);border:1px solid #eef2f7;border-radius:6px;box-shadow:0 2px 9px #0f172a12;display:grid;grid-template-columns:48% 1fr;overflow:hidden;transition:border-color var(--transition-base),box-shadow var(--transition-base),transform var(--transition-base)}.paper-book-card:hover{border-color:#1b78f859;box-shadow:0 8px 22px #0f172a1c;transform:translateY(-1px)}.paper-cover{position:relative;min-height:258px;overflow:hidden;background:#fff}.paper-cover.math{border-right:1px solid #eef2f7;background:linear-gradient(122deg,transparent 0 55%,#f8fafc 56% 100%),linear-gradient(125deg,#12b7df 0 38%,#57c8e4 38% 70%,#f7fbff 70% 100%)}.paper-cover.math:before{content:"";position:absolute;left:-36px;right:-36px;top:128px;height:72px;background:linear-gradient(118deg,#0fb2da 0 45%,#41c4e6 45% 67%,#ffffff26 67% 100%);transform:skewY(0)}.paper-cover.math:after{content:"";position:absolute;inset:auto 0 0;height:62px;background:repeating-linear-gradient(135deg,#f7fafc 0 2px,#edf2f7 2px 4px);opacity:.72}.paper-cover.math.alt{background:linear-gradient(122deg,transparent 0 55%,#f8fafc 56% 100%),linear-gradient(125deg,#11a8dd 0 40%,#72d5ee 40% 72%,#f7fbff 72% 100%)}.cover-triangle{position:absolute;top:0;right:28px;width:46px;height:36px;background:#58c8e9;clip-path:polygon(0 0,100% 0,50% 100%);z-index:2}.cover-logo{position:absolute;top:12px;left:14px;width:30px;height:30px;border-radius:50%;background:#0d8f69;border:3px solid #e7fff6;z-index:3}.cover-note{position:absolute;top:12px;left:54px;color:#667085;font-size:7px;letter-spacing:.5px;z-index:3}.cover-version{position:absolute;top:86px;left:30px;z-index:3;display:flex;gap:6px}.cover-version span{width:20px;height:20px;border-radius:6px;background:#7776b5;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:var(--fw-semibold)}.cover-title{position:absolute;top:80px;left:82px;right:18px;z-index:3;color:#1f2937;font-size:25px;letter-spacing:10px;text-align:left;font-weight:var(--fw-bold)}.cover-grade{position:absolute;top:116px;left:50%;z-index:3;transform:translate(-50%);background:#26b7df;color:#0f172a;min-width:72px;text-align:center;font-size:8px;line-height:14px;font-weight:var(--fw-medium)}.cover-publisher{position:absolute;left:0;right:0;bottom:8px;z-index:3;color:#6b7280;text-align:center;font-size:8px}.paper-cover.school{border-radius:4px 0 0 4px;background:radial-gradient(circle at 24% 16%,rgba(255,255,255,.82),transparent 22%),linear-gradient(180deg,#dff5ff,#c5ecf4 44%,#6bd8df)}.paper-cover.school:before{content:"";position:absolute;left:-20px;right:-20px;bottom:62px;height:34px;border-top:7px solid #0b93bc;border-radius:50% 50% 0 0;transform:rotate(-6deg);background:#ffffffeb}.paper-cover.school:after{content:"";position:absolute;left:48px;right:48px;bottom:78px;height:62px;border:4px solid rgba(12,150,181,.35);border-top:none;border-radius:0 0 48px 48px}.school-title{position:absolute;top:70px;left:26px;right:26px;z-index:3;color:#07543f;font-size:24px;line-height:1.18;font-weight:var(--fw-bold);letter-spacing:1px}.paper-book-info{min-width:0;padding:22px 20px 18px;display:flex;flex-direction:column;align-items:flex-start}.paper-book-title{margin-bottom:auto;color:#0f172a;font-size:20px;line-height:1.35;font-weight:var(--fw-bold)}.paper-subject-tag{margin-top:18px;margin-bottom:10px;display:inline-flex;align-items:center;justify-content:center;min-height:24px;padding:2px 10px;border-radius:5px;background:#eef4ff;color:#2f63ff;font-size:13px;line-height:1}.paper-book-meta{color:#1f2a44;font-size:14px;line-height:1.55;margin-bottom:16px}.paper-analyze{min-width:104px;height:42px;border-radius:5px;font-size:15px}.paper-analyze svg{width:16px;height:16px;stroke:currentColor}.paper-pagination{position:absolute;right:0;bottom:0;display:flex;align-items:center;gap:14px;color:#475569;font-size:13px}.paper-page-btn{width:38px;height:38px;border-radius:4px;border:none;background:transparent;color:#aeb7c5;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:color var(--transition-fast),background var(--transition-fast)}.paper-page-btn:hover{color:var(--brand-primary);background:#eef4ff}.paper-page-btn.active{background:#4f6df6;color:#fff;font-weight:var(--fw-semibold)}.paper-page-btn svg{width:16px;height:16px;stroke:currentColor}.paper-toast{position:fixed;top:74px;left:calc(50% + var(--sidebar-width) / 2);transform:translate(-50%);z-index:2000;min-width:180px;padding:10px 18px;border-radius:999px;background:#0f172adb;color:#fff;text-align:center;font-size:13px;opacity:0;pointer-events:none;transition:opacity var(--transition-base),transform var(--transition-base)}.paper-toast.show{opacity:1;transform:translate(-50%,4px)}@media(max-width:1220px){.paper-filter-grid{grid-template-columns:repeat(2,minmax(230px,1fr))}.paper-book-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}