<style>
:root{--primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#60a5fa;--gray-50:#f7fafc;--gray-100:#edf2f7;--gray-200:#e2e8f0;--gray-300:#cbd5e0;--gray-500:#718096;--gray-600:#4a5568;--gray-700:#2d3748;--gray-800:#1a202c;--radius:12px;--shadow:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.07),0 2px 4px -1px rgba(0,0,0,0.04);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.08),0 4px 6px -2px rgba(0,0,0,0.04)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans SC",sans-serif;background:var(--gray-50);color:var(--gray-700);line-height:1.6}
.quick-box {
background: #fff;
border-radius: 12px;
padding: 28px;
box-shadow: 0 2px 8px rgba(0,0,0,0.04);
position: relative;
overflow: hidden;
transition: all 0.35s ease;
border: 1px solid #ccc;
}
.quick-box::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
height: 4px;
background: linear-gradient(90deg, var(--primary), #7c3aed);
}
.quick-box:hover {
transform: translateY(-4px);
box-shadow: 0 12px 32px rgba(37,99,235,0.1);
}
.member-header{background:#2563eb;position:sticky;top:0;z-index:100;box-shadow:0 4px 20px rgba(102,126,234,0.3)}
.header-row-top{border-bottom:1px solid rgba(255,255,255,0.12)}
.header-row-nav{background:rgba(0,0,0,0.06)}
.member-header .header-inner{max-width:1640px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.member-header .header-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.member-header .header-logo img{max-width:100%;max-height:44px;width:auto;height:auto;object-fit:contain}
.member-header .header-nav{display:flex;gap:6px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;justify-content:center;align-items:center;margin:0 auto;width:100%;max-width:100%;padding:0}
.member-header .header-nav::-webkit-scrollbar{display:none}
.member-header .nav-item{display:flex;align-items:center;gap:6px;padding:9px 18px;border-radius:8px;color:rgba(255,255,255,0.92);text-decoration:none;font-size:15px;font-weight:500;transition:all 0.25s ease;white-space:nowrap}
.member-header .nav-item:hover{background:rgba(255,255,255,0.15);color:#fff}
.member-header .nav-item.active{background:rgba(255,255,255,0.2);color:#fff;font-weight:600}
.header-actions{display:flex;align-items:center;gap:10px}
.btn-sm{padding:7px 16px;border-radius:20px;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s;cursor:pointer;border:none;display:inline-flex;align-items:center;gap:6px}
.btn-outline{background:transparent;color:rgba(255,255,255,0.9);border:1px solid rgba(255,255,255,0.3)}
.btn-outline:hover{background:rgba(255,255,255,0.15);color:#fff;border-color:rgba(255,255,255,0.5)}
.btn-primary-sm{background:rgba(255,255,255,0.2);color:#fff;border:1px solid rgba(255,255,255,0.25)}
.btn-primary-sm:hover{background:rgba(255,255,255,0.3);color:#fff}

.mobile-top-header{display:none;position:fixed;top:0;left:0;right:0;height:56px;background:#2563eb;z-index:200;align-items:center;justify-content:space-between;padding:0 16px;box-shadow:0 2px 12px rgba(37,99,235,0.3)}
.mobile-top-logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:#fff}
.mobile-top-logo img{max-height:32px;width:auto;object-fit:contain}
.mobile-top-menu-btn{background:none;border:none;color:#fff;font-size:24px;cursor:pointer;padding:4px 8px;display:flex;flex-direction:column;gap:4px}
.mobile-top-menu-btn span{display:block;width:22px;height:2px;background:#fff;border-radius:1px;transition:all .3s}
.mobile-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:199}
body.menu-open .mobile-overlay{display:block}
body.menu-open .mobile-nav{transform:translateX(0)}
.mobile-nav{position:fixed;top:0;right:0;bottom:0;width:280px;background:#fff;z-index:201;transform:translateX(100%);transition:transform .3s ease;overflow-y:auto;padding:24px 0}
.mobile-nav-header{padding:20px 20px 16px;border-bottom:1px solid #e2e8f0;display:flex;align-items:center;gap:12px}
.mobile-nav-header .user-avatar{width:40px;height:40px;border-radius:50%;background:#2563eb;color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600}
.mobile-nav-header .user-name{font-size:16px;font-weight:600;color:#1a202c}
.mobile-nav-header .user-role{font-size:12px;color:#718096}
.mobile-nav-item{display:flex;align-items:center;gap:12px;padding:14px 20px;color:#2d3748;text-decoration:none;font-size:15px;transition:background .15s}
.mobile-nav-item:hover,.mobile-nav-item.active{background:#eff6ff;color:#2563eb}
.mobile-nav-item.active{font-weight:600}
.mobile-nav-item.logout{color:#dc2626}
.mobile-nav-divider{height:1px;background:#e2e8f0;margin:8px 0}

.detail-hero{background:linear-gradient(135deg,#1e3a5f 0%,#2d5a8e 50%,#1a4a7a 100%);padding:48px 0 40px;position:relative;overflow:hidden}
.detail-hero::before{content:'';position:absolute;top:-80px;right:-80px;width:350px;height:350px;background:radial-gradient(circle,rgba(255,255,255,0.06) 0%,transparent 70%);border-radius:50%}
.hero-inner{max-width:1600px;margin:0 auto;padding:0 32px;position:relative;z-index:1}
.hero-breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:20px;font-size:14px;color:rgba(255,255,255,0.7);flex-wrap:wrap}
.hero-breadcrumb a{color:rgba(255,255,255,0.7);text-decoration:none;transition:color .2s}
.hero-breadcrumb a:hover{color:#fff}
.hero-breadcrumb .sep{color:rgba(255,255,255,0.4)}
.hero-breadcrumb .current{color:#fff}
.hero-title{font-size:1.9rem;font-weight:800;color:#fff;margin-bottom:18px;line-height:1.5;letter-spacing:-0.3px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px}
.hero-meta-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;border-radius:8px;font-size:13px;background:rgba(255,255,255,0.12);color:rgba(255,255,255,0.9);backdrop-filter:blur(4px);border:1px solid rgba(255,255,255,0.08)}

.detail-wrap{max-width:1600px;margin:0 auto;padding:0 32px 60px}

.content-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);margin-top:24px;overflow:hidden}
.doc-header{padding:32px 40px 0;text-align:center}
.doc-header .doc-red-line{height:2px;background:#cc0000;margin:0 0 24px;border:none}
.doc-header .doc-title{font-size:22px;font-weight:700;color:#000;line-height:1.6;font-family:"SimSun","Songti SC","Noto Serif SC",serif;letter-spacing:1px;margin-bottom:16px}
.doc-meta-info{display:flex;justify-content:center;gap:20px;font-size:14px;color:#666;margin-bottom:8px}
.doc-meta-info span{display:inline-flex;align-items:center;gap:4px}
.doc-title-print{display:none}
.content-header{padding:0 40px;margin-top:20px}
.content-excerpt{background:#f8fafc;border-left:3px solid var(--primary);padding:12px 16px;font-size:14px;color:var(--gray-600);line-height:1.8;border-radius:0 6px 6px 0}
.content-body{padding:24px 40px 32px;font-size:16px;line-height:2;color:#000;font-family:"FangSong","FangSong_GB2312","STFangsong","Noto Serif SC",serif;letter-spacing:0.5px}
.content-body p{margin-bottom:12px;text-indent:2em}
.content-body p:first-child{text-indent:0}
.print-footer{display:none}
.content-footer{padding:16px 40px 24px;border-top:1px solid var(--gray-200)}
.content-footer .actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:8px;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s;cursor:pointer;border:none;white-space:nowrap}
.btn-outline-gray{background:#f3f4f6;color:var(--gray-700);border:1px solid var(--gray-200)}
.btn-outline-gray:hover{background:#e5e7eb;color:var(--gray-800);border-color:var(--gray-300)}
.btn-accent{background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;box-shadow:0 2px 8px rgba(37,99,235,0.3)}
.btn-accent:hover{box-shadow:0 4px 12px rgba(37,99,235,0.4);transform:translateY(-1px)}

.doc-actions-bar{background:#fff;border-bottom:1px solid var(--gray-200);box-shadow:0 2px 8px rgba(0,0,0,0.06);margin:0 -32px;padding:0 32px}
.doc-actions-inner{max-width:1600px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:56px;gap:16px}
.doc-actions-left{display:flex;align-items:center;gap:16px;min-width:0;flex:1}
.doc-actions-right{display:flex;align-items:center;gap:8px;flex-shrink:0}
.doc-actions-title{font-size:14px;color:var(--gray-600);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.action-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:8px;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s;cursor:pointer;border:none;white-space:nowrap}
.action-back{background:#f3f4f6;color:var(--gray-700)}
.action-back:hover{background:#e5e7eb;color:var(--gray-800)}
.action-download{background:#059669;color:#fff}
.action-download:hover{background:#047857;box-shadow:0 2px 8px rgba(5,150,105,0.3)}
.action-print{background:#f3f4f6;color:var(--gray-700)}
.action-print:hover{background:#e5e7eb}
.action-share{background:#f3f4f6;color:var(--gray-700)}
.action-share:hover{background:#e5e7eb}

.doc-preview-container{display:flex;gap:28px;align-items:flex-start;margin-top:24px}
.doc-paper{flex:1;min-width:0;background:#fff;border-radius:4px;box-shadow:0 2px 12px rgba(0,0,0,0.08),0 0 0 1px rgba(0,0,0,0.04);padding:56px 64px 48px;position:relative;overflow:hidden}
.doc-paper::before{content:'';position:absolute;top:0;left:0;bottom:0;width:1px;background:rgba(0,0,0,0.04)}
.doc-paper::after{content:'';position:absolute;top:0;right:0;bottom:0;width:1px;background:rgba(0,0,0,0.04)}

.doc-red-header{text-align:center;padding-bottom:8px}
.doc-issuer{font-size:26px;font-weight:900;color:#cc0000;font-family:"SimSun","Songti SC","Noto Serif SC",serif;letter-spacing:8px;line-height:1.4}
.doc-red-line{height:2px;background:#cc0000;margin:12px 0 32px;border:none}

.doc-preview-title{font-size:22px;font-weight:700;color:#000;text-align:center;line-height:1.6;margin-bottom:16px;font-family:"SimSun","Songti SC","Noto Serif SC",serif;letter-spacing:1px}
.doc-preview-meta{text-align:center;font-size:14px;color:#666;margin-bottom:28px;display:flex;justify-content:center;gap:24px}
.doc-preview-meta span{display:inline-flex;align-items:center;gap:4px}

.doc-preview-body{font-size:16px;line-height:2;color:#000;font-family:"FangSong","FangSong_GB2312","STFangsong","Noto Serif SC",serif;letter-spacing:0.5px}
.doc-preview-body p{margin-bottom:12px;text-indent:2em}
.doc-preview-body p:first-child{text-indent:0}

.doc-preview-footer{margin-top:40px;text-align:center}
.doc-separator{height:1px;background:#e5e7eb;margin-bottom:16px}
.doc-preview-footer p{font-size:12px;color:#999}

.doc-sidebar{width:300px;flex-shrink:0;display:flex;flex-direction:column;gap:16px;position:sticky;top:100px}
.sidebar-download-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 12px rgba(0,0,0,0.06);border:1px solid var(--gray-200);text-align:center}
.sidebar-download-icon{font-size:40px;color:#2563eb;margin-bottom:8px}
.sidebar-download-info{margin-bottom:16px}
.sidebar-download-label{font-size:15px;font-weight:600;color:var(--gray-800);margin-bottom:4px}
.sidebar-download-desc{font-size:13px;color:var(--gray-500)}
.sidebar-download-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;background:#059669;color:#fff;border-radius:8px;font-size:15px;font-weight:600;text-decoration:none;transition:all .2s;border:none;cursor:pointer}
.sidebar-download-btn:hover{background:#047857;transform:translateY(-1px);box-shadow:0 4px 12px rgba(5,150,105,0.3)}

.sidebar-info-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 12px rgba(0,0,0,0.06);border:1px solid var(--gray-200)}
.sidebar-info-title{font-size:14px;font-weight:600;color:var(--gray-800);margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--gray-100)}
.sidebar-info-row{display:flex;justify-content:space-between;align-items:center;padding:8px 0;font-size:13px}
.sidebar-info-row .info-label{color:var(--gray-500)}
.sidebar-info-row .info-value{color:var(--gray-800);font-weight:500}

.sidebar-ai-card{display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,#eff6ff 0%,#f0f9ff 100%);border-radius:12px;padding:16px 20px;text-decoration:none;transition:all .2s;border:1px solid #bfdbfe}
.sidebar-ai-card:hover{border-color:var(--primary);box-shadow:0 4px 12px rgba(37,99,235,0.15);transform:translateY(-2px)}
.sidebar-ai-icon{width:36px;height:36px;border-radius:8px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.sidebar-ai-text{flex:1;min-width:0}
.sidebar-ai-title{font-size:14px;font-weight:600;color:var(--gray-800)}
.sidebar-ai-desc{font-size:12px;color:var(--gray-500)}
.sidebar-ai-card .bi-chevron-right{color:var(--gray-400);font-size:14px;flex-shrink:0}

.nav-links{display:flex;justify-content:space-between;gap:16px;margin-top:24px}
.nav-link-card{border:1px solid #ccc;flex:1;background:#fff;border-radius:var(--radius);padding:16px 20px;text-decoration:none;transition:all .2s;min-width:0}
.nav-link-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}
.nav-link-card .label{font-size:12px;color:var(--gray-500);margin-bottom:4px}
.nav-link-card .title{font-size:16px;color:#333;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav-link-card.next{border:1px solid #ccc;text-align:right}
.nav-link-card.empty{opacity:1;pointer-events:none;border:1px solid #ccc}

.related-section{margin-top:40px}
.related-header{display:flex;align-items:center;gap:10px;margin-bottom:20px}
.related-header::before{content:'';width:4px;height:20px;background:linear-gradient(180deg,var(--primary),var(--primary-dark));border-radius:2px}
.related-header h2{font-size:1.15rem;font-weight:700;color:var(--gray-800)}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.related-item{border:1px solid #ccc;display:flex;align-items:flex-start;gap:14px;padding:16px;background:#fff;border-radius:10px;text-decoration:none;transition:all .2s}
.related-item:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.related-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff;flex-shrink:0}
.related-info{flex:1;min-width:0}
.related-info .r-title{font-size:16px;font-weight:500;color:#333;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block;margin-bottom:4px}
.related-info .r-meta{font-size:12px;color:var(--gray-500)}

.cta-banner{margin-top:40px;background:linear-gradient(135deg,#1e3a5f 0%,#2d5a8e 100%);border-radius:var(--radius);padding:36px 32px;color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-banner::before{content:'';position:absolute;top:-60px;right:-40px;width:200px;height:200px;background:radial-gradient(circle,rgba(255,255,255,0.08) 0%,transparent 70%);border-radius:50%}
.cta-banner h3{font-size:1.3rem;font-weight:700;margin-bottom:8px;position:relative;z-index:1;color:#fff}
.cta-banner p{font-size:15px;opacity:.85;margin-bottom:20px;position:relative;z-index:1}
.cta-banner .btn-white{background:#fff;color:var(--primary-dark);padding:12px 32px;border-radius:8px;text-decoration:none;font-weight:600;display:inline-block;transition:transform .2s;position:relative;z-index:1}
.cta-banner .btn-white:hover{transform:scale(1.05)}

.app-footer{border-top:1px solid var(--gray-200);padding:20px 24px;margin-top:0;background:#fff}
.footer-inner{max-width:1600px;margin:0 auto;text-align:center}
.copyright{font-size:.85rem;color:#000}
.copyright a{color:#000;text-decoration:none}

.not-found{text-align:center;padding:120px 24px}
.not-found i{font-size:72px;color:var(--gray-300);margin-bottom:20px;display:block}
.not-found h2{font-size:1.5rem;color:var(--gray-600);margin-bottom:8px}
.not-found p{color:var(--gray-500);margin-bottom:24px}

.share-modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:300;align-items:center;justify-content:center}
.share-modal-overlay.active{display:flex}
.share-modal{background:#fff;border-radius:12px;padding:28px;width:90%;max-width:520px;box-shadow:0 20px 60px rgba(0,0,0,0.2);position:relative}
.share-modal h3{font-size:1.15rem;font-weight:700;margin-bottom:16px;color:var(--gray-800)}
.share-modal .share-options{display:flex;flex-direction:column;gap:10px;margin-bottom:16px}
.share-option{display:flex;align-items:center;gap:12px;padding:12px 16px;border:1px solid var(--gray-200);border-radius:8px;cursor:pointer;transition:all .2s;text-decoration:none;color:var(--gray-700)}
.share-option:hover{border-color:var(--primary);background:#eff6ff;color:var(--primary)}
.share-option i{font-size:20px;width:24px;text-align:center}
.share-option .share-label{font-weight:500}
.share-option .share-desc{font-size:12px;color:var(--gray-500)}
.share-link-box{display:flex;gap:8px;margin-top:12px}
.share-link-box input{flex:1;padding:10px 14px;border:1px solid var(--gray-200);border-radius:8px;font-size:14px;background:var(--gray-50);color:var(--gray-700)}
.share-link-box button{padding:10px 18px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;white-space:nowrap}
.share-link-box button:hover{background:var(--primary-dark)}
.share-modal .close-btn{position:absolute;top:12px;right:16px;background:none;border:none;font-size:22px;color:var(--gray-500);cursor:pointer;padding:4px}
.share-modal .close-btn:hover{color:var(--gray-800)}
.share-attribution{background:#fffbeb;border:1px solid #fde68a;border-radius:6px;padding:10px 14px;font-size:13px;color:#92400e;margin-top:12px}
.share-attribution i{margin-right:4px}

@media print{
    body{background:#fff!important;color:#000!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
    .member-header,.mobile-top-header,.mobile-overlay,.mobile-nav,.detail-hero,.doc-actions-bar,.doc-sidebar,.nav-links,.related-section,.cta-banner,.app-footer,.share-modal-overlay,.preview-modal-overlay,.content-footer{display:none!important}
    .detail-wrap{padding:0!important;max-width:100%!important}
    .content-card{box-shadow:none!important;margin-top:0!important}
    .doc-header{display:none!important}
    .doc-title-print{display:block!important;text-align:center;margin-bottom:16px}
    .doc-title-print h1{font-size:22pt;font-weight:700;letter-spacing:2px}
    .doc-meta-print{font-size:12pt;color:#666;margin-top:8px}
    .content-body{padding:20px 0!important;font-size:12pt!important;line-height:28pt!important;letter-spacing:1px!important}
    .content-body p{text-indent:2em!important;margin-bottom:4px!important}
    .print-footer{display:block!important;text-align:center;font-size:10pt;color:#999;margin-top:20px}
    .doc-preview-container{display:block!important}
    .doc-paper{box-shadow:none!important;border-radius:0!important;padding:40px 0!important}
    .doc-paper::before,.doc-paper::after{display:none!important}
    .doc-red-line{background:#cc0000!important}
    .doc-issuer{color:#cc0000!important}
    .doc-preview-title{font-size:22pt!important;letter-spacing:2px!important}
    .doc-preview-body{font-size:12pt!important;line-height:28pt!important;letter-spacing:1px!important}
    .doc-preview-body p{text-indent:2em!important;margin-bottom:4px!important}
    .doc-preview-footer{display:none!important}
}

@media(max-width:1023px){
    .hero-inner,.detail-wrap{padding-left:24px;padding-right:24px}
    .doc-actions-bar{margin:0 -24px;padding:0 24px}
    .related-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
    .doc-paper{padding:40px 48px 36px}
    .doc-sidebar{width:260px}
}
@media(max-width:767px){
    .member-header{display:none !important}
    .mobile-top-header{display:flex !important}
    body{padding-top:56px}
    .detail-hero{padding:32px 0 28px}
    .hero-inner{padding:0 16px}
    .hero-title{font-size:1.4rem}
    .hero-meta{gap:6px}
    .hero-meta-tag{padding:5px 10px;font-size:12px}
    .detail-wrap{padding:0 16px 40px}
    .content-card{margin-top:16px;border-radius:0}
    .doc-header{padding:20px 16px 0}
    .doc-header .doc-title{font-size:18px}
    .doc-meta-info{font-size:12px;gap:12px;flex-wrap:wrap;justify-content:center}
    .content-header{padding:0 16px;margin-top:12px}
    .content-body{padding:16px 16px 24px;font-size:15px;line-height:1.9}
    .content-footer{padding:12px 16px 20px}
    .content-footer .actions{gap:6px}
    .btn{padding:6px 12px;font-size:12px}
    .doc-actions-bar{margin:0 -16px;padding:0 16px}
    .doc-actions-inner{height:48px;gap:8px}
    .doc-actions-title{display:none}
    .action-btn{padding:6px 10px;font-size:12px}
    .action-btn span,.action-back span{display:none}
    .action-download{padding:6px 14px;font-size:12px}
    .doc-preview-container{flex-direction:column;gap:0;margin-top:16px}
    .doc-paper{padding:28px 24px 24px;box-shadow:none;border-radius:0;border-top:1px solid var(--gray-200)}
    .doc-paper::before,.doc-paper::after{display:none}
    .doc-issuer{font-size:20px;letter-spacing:4px}
    .doc-red-line{margin:8px 0 20px}
    .doc-preview-title{font-size:18px;margin-bottom:12px}
    .doc-preview-meta{font-size:13px;gap:16px;margin-bottom:20px}
    .doc-preview-body{font-size:15px;line-height:1.9}
    .doc-sidebar{width:100%;position:static;flex-direction:row;flex-wrap:wrap;gap:12px;padding:16px 0}
    .sidebar-download-card{flex:1;min-width:200px}
    .sidebar-info-card{flex:1;min-width:200px}
    .sidebar-ai-card{flex:1;min-width:200px}
    .nav-links{flex-direction:column}
    .related-grid{grid-template-columns:1fr}
    .cta-banner{padding:28px 20px}
    .app-footer{padding:16px 12px;margin-top:30px}
    .copyright{font-size:.75rem}
}

.preview-modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:500;flex-direction:column}
.preview-modal-overlay.active{display:flex}
.preview-modal-header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:#1e293b;color:#fff;flex-shrink:0}
.preview-modal-title{font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px}
.preview-modal-actions{display:flex;align-items:center;gap:10px}
.preview-download-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 18px;background:#059669;color:#fff;border-radius:6px;font-size:13px;font-weight:500;text-decoration:none;transition:background .2s}
.preview-download-btn:hover{background:#047857}
.preview-close-btn{background:rgba(255,255,255,0.1);border:none;color:#fff;font-size:20px;width:32px;height:32px;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}
.preview-close-btn:hover{background:rgba(255,255,255,0.2)}
.preview-modal-body{flex:1;overflow-y:auto;padding:32px 24px;background:#f1f5f9}
.preview-content-container{display:flex;gap:28px;align-items:flex-start;margin:0 auto;max-width:1200px}
.preview-content-container .doc-paper{flex:1;min-width:0}
.preview-content-container .doc-sidebar{width:280px;flex-shrink:0;position:sticky;top:0}
.preview-file-container{display:flex;gap:24px;align-items:flex-start;margin:0 auto;max-width:1400px;height:100%}
.preview-file-viewer{flex:1;min-width:0;background:#fff;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.08);overflow:hidden;height:calc(100vh - 140px)}
.preview-iframe{width:100%;height:100%;border:none;display:block}
.preview-unavailable{display:flex;flex-direction:column;align-items:center;justify-content:center;height:calc(100vh - 200px);color:var(--gray-500);gap:16px}
.preview-unavailable i{font-size:64px;color:var(--gray-300)}
.preview-unavailable p{font-size:16px;color:var(--gray-500)}
.preview-download-fallback{display:inline-flex;align-items:center;gap:8px;padding:10px 24px;background:#059669;color:#fff;border-radius:8px;font-size:14px;font-weight:500;text-decoration:none;transition:background .2s}
.preview-download-fallback:hover{background:#047857}
.preview-file-container .doc-sidebar{width:280px;flex-shrink:0;position:sticky;top:0;max-height:calc(100vh - 140px);overflow-y:auto}
.preview-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--gray-500);gap:12px}
.spin-icon{font-size:32px;animation:spin 1s linear infinite}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
.doc-preview-text{padding:40px 48px;font-size:16px;line-height:2;color:#000;font-family:"FangSong","FangSong_GB2312","STFangsong","Noto Serif SC",serif;letter-spacing:0.5px}
.doc-preview-text p{margin-bottom:12px;text-indent:2em}
.doc-preview-text p:first-child{text-indent:0}
.preview-error{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--gray-500);gap:16px}
.preview-error i{font-size:48px;color:#dc2626}
.preview-error p{font-size:16px}

@media(max-width:1023px){
    .preview-content-container{flex-direction:column}
    .preview-content-container .doc-sidebar{width:100%;position:static;flex-direction:row;flex-wrap:wrap;gap:12px}
    .preview-content-container .sidebar-download-card{flex:1;min-width:200px}
    .preview-content-container .sidebar-info-card{flex:1;min-width:180px}
    .preview-file-container{flex-direction:column}
    .preview-file-viewer{height:60vh}
    .preview-file-container .doc-sidebar{width:100%;position:static;flex-direction:row;flex-wrap:wrap;gap:12px}
    .preview-file-container .sidebar-download-card{flex:1;min-width:200px}
    .preview-file-container .sidebar-info-card{flex:1;min-width:180px}
}
@media(max-width:767px){
    .preview-modal-header{padding:10px 16px;flex-wrap:wrap;gap:8px}
    .preview-modal-actions{order:2;width:100%;justify-content:flex-end}
    .preview-modal-body{padding:16px 12px}
    .preview-file-viewer{height:50vh}
}
</style>
