:root{color-scheme:light;--primary-purple: #2563eb;--primary-pink: #2563eb;--primary-blue: #2563eb;--primary-teal: #2563eb;--text-dark: #0b1220;--text-navajowhite: #64748b;--text-gray: #526173;--text-light: #f8fafc;--bg-white: #ffffff;--bg-light-gray: #f6f8fc;--bg-gray: #dbe4ef;--surface-soft: #f8fbff;--surface-line: rgba(37, 99, 235, .14);--surface-glow: rgba(37, 99, 235, .12);--success: #475569;--warning: #64748b;--error: #334155;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-full: 50px;--shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, .06);--shadow-md: 0 14px 34px -22px rgba(15, 23, 42, .45);--shadow-lg: 0 24px 54px -34px rgba(15, 23, 42, .5);--shadow-xl: 0 36px 80px -44px rgba(15, 23, 42, .55);--font-family: "PingFang SC", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--transition-fast: .15s ease;--transition-normal: .3s ease;--transition-slow: .5s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-family);line-height:1.6;color:var(--text-dark);background:#f8fafc;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}img{max-width:100%;height:auto;display:block}a{color:var(--primary-blue);text-decoration:none}a:where(:not(.btn,.nav-link,.logo)):where(:hover,:focus-visible){color:#1d4ed8;text-decoration:none}a:where(:not(.btn,.nav-link,.logo)):focus-visible{outline:2px solid rgba(37,99,235,.5);outline-offset:3px}ul,ol{list-style:none}button{cursor:pointer;border:none;background:none;font:inherit}input,textarea,select{font:inherit;border:none;outline:none}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}#app{min-height:100vh;display:flex;flex-direction:column}.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:#ffffffd1;border-bottom:1px solid rgba(148,163,184,.18);box-shadow:0 10px 30px -28px #0f172ab3;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);transition:var(--transition-normal)}.header-container{display:flex;align-items:center;justify-content:space-between;height:70px;padding:0 var(--spacing-xl)}.logo{display:flex;align-items:center;gap:var(--spacing-sm);white-space:nowrap}.logo-img{height:56px;width:auto}.logo-text{display:grid;gap:2px;font-family:PingFang SC,Microsoft YaHei,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.05}.logo-name{display:block;background:linear-gradient(135deg,#0f172a,var(--primary-purple),var(--primary-pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-size:1.28rem;font-weight:800;line-height:1.05}.logo-tagline{display:block;color:var(--text-gray);font-size:.84rem;font-weight:650;letter-spacing:0;line-height:1.05}.header-right{display:flex;align-items:center;gap:var(--spacing-lg)}.nav{display:flex;gap:var(--spacing-lg)}.nav-link{position:relative;padding:var(--spacing-sm) 0;font-weight:500;color:var(--text-dark);transition:var(--transition-fast)}.nav-link:hover,.nav-link.active{color:var(--primary-purple)}.nav-link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--primary-purple),var(--primary-pink));transition:var(--transition-normal)}.nav-link:hover:after,.nav-link.active:after{width:100%}.language-switch{display:inline-flex;align-items:center;flex-shrink:0;padding:3px;border:1px solid var(--surface-line);border-radius:var(--radius-md);background:#f8fafce6;font-size:12px;line-height:1}.language-switch a{padding:7px 8px;border-radius:5px;color:var(--text-gray);font-weight:650;white-space:nowrap}.language-switch a:hover,.language-switch a[aria-current=page]{background:#fff;color:#1d4ed8;box-shadow:0 1px 4px #0f172a1f}.mobile-menu-btn{display:none;flex-direction:column;gap:5px;padding:var(--spacing-sm)}.mobile-menu-btn span{display:block;width:25px;height:3px;background-color:var(--text-dark);transition:var(--transition-fast)}.main-layout{display:flex;max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);gap:var(--spacing-xl)}.main{flex:1;min-width:0;margin-top:70px;padding:var(--spacing-2xl) 0}.sidebar{width:280px;flex-shrink:0;margin-top:70px;padding:var(--spacing-2xl) 0}.sidebar-title{font-size:1.1rem;font-weight:700;color:var(--text-dark);margin-bottom:var(--spacing-md);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--bg-gray)}.sidebar-books{display:flex;flex-direction:column;gap:var(--spacing-md)}.sidebar-book-item{display:flex;gap:var(--spacing-sm);padding:var(--spacing-sm);background-color:var(--bg-light-gray);border-radius:var(--radius-md);transition:var(--transition-fast)}.sidebar-book-item:hover{background-color:var(--bg-gray)}.sidebar-book-cover{width:120px;height:120px;object-fit:cover;border-radius:var(--radius-sm);flex-shrink:0}.sidebar-book-info{display:flex;flex-direction:column;justify-content:center;min-width:0}.sidebar-book-title{font-size:.85rem;font-weight:600;color:var(--text-dark);line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:2px;transition:var(--transition-fast)}.sidebar-book-title:hover{color:var(--primary-purple)}.sidebar-book-author{font-size:.75rem;color:var(--text-gray);margin-bottom:2px}.sidebar-buy-btn{display:inline-block;margin-top:4px;font-size:.75rem;font-weight:600;color:var(--primary-pink);transition:var(--transition-fast)}.sidebar-buy-btn:hover{color:var(--primary-purple)}.sidebar-book-rating{display:flex;gap:1px}.sidebar-star{font-size:.7rem}.sidebar-star.full{color:var(--warning)}.sidebar-star.empty{color:var(--bg-gray)}.footer{background:radial-gradient(circle at 20% 0%,rgba(37,99,235,.1),transparent 26rem),linear-gradient(135deg,#0b1220,#111827 55%,#0f172a);border-top:1px solid rgba(37,99,235,.18);padding:var(--spacing-2xl) 0 var(--spacing-md);margin-top:auto}.footer-container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-xl)}.footer-content{display:grid;grid-template-columns:1.5fr repeat(3,minmax(140px,1fr));gap:var(--spacing-2xl);padding-bottom:var(--spacing-xl);border-bottom:1px solid rgba(148,163,184,.22)}.footer-brand h4{font-size:1.1rem;font-weight:700;margin-bottom:4px;background:linear-gradient(135deg,#e0f2fe,var(--primary-pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.footer-brand strong{display:block;margin-bottom:var(--spacing-sm);color:#94a3b8;font-size:.9rem;font-weight:650}.footer-brand p{color:#cbd5e1;font-size:.9rem;line-height:1.6;margin-bottom:var(--spacing-md)}.footer-email{display:inline-flex;align-items:center;gap:6px;color:var(--primary-purple);font-size:.9rem;font-weight:500;transition:var(--transition-fast)}.footer-email:hover{color:var(--primary-pink)}.footer-links h4{font-size:.95rem;font-weight:600;color:#f8fafc;margin-bottom:var(--spacing-md)}.footer-links ul{list-style:none;display:flex;flex-direction:column;gap:var(--spacing-sm)}.footer-links a{color:var(--primary-blue);font-size:.9rem;transition:var(--transition-fast)}.footer-links a:hover{color:var(--primary-purple);padding-left:4px}.footer-bottom{text-align:center;padding-top:var(--spacing-lg);color:#94a3b8;font-size:.85rem}.loading{display:flex;align-items:center;justify-content:center;min-height:100vh;font-size:1.2rem;color:var(--text-gray)}@media(max-width:1200px){.container{max-width:960px}}@media(max-width:992px){.container{max-width:720px}.header-container,.main-layout{padding:0 var(--spacing-lg)}.sidebar{display:none}}@media(max-width:768px){.header-right:has(.language-switch){width:auto;flex:0 0 auto}.language-switch a{padding:6px}.main-layout{width:100%;max-width:none;padding-left:0;padding-right:0}.container{max-width:540px;padding:0 var(--spacing-md)}.header-container{height:auto;min-height:70px;flex-wrap:wrap;padding:var(--spacing-sm) var(--spacing-md);gap:var(--spacing-sm)}.logo{flex:1 1 auto;min-width:0}.logo-img{height:36px;flex-shrink:0}.logo-text{min-width:0}.logo-name{font-size:1rem}.logo-tagline{font-size:.72rem}.header-right{width:100%;justify-content:space-between;gap:var(--spacing-sm)}.mobile-menu-btn{display:flex}.nav{position:fixed;top:70px;left:0;right:0;bottom:0;background-color:var(--bg-white);flex-direction:column;padding:var(--spacing-xl);transform:translate(-100%);transition:var(--transition-normal);box-shadow:var(--shadow-xl)}.nav.open{transform:translate(0)}.nav-link{font-size:1.2rem;padding:var(--spacing-md) 0}.main{margin-top:70px;padding:var(--spacing-lg) 0}.footer-content{grid-template-columns:1fr;gap:var(--spacing-lg)}}@media(max-width:400px){.language-switch{font-size:11px}.language-switch a{padding:6px 5px}}@media(max-width:576px){.header-container{min-height:48px;padding:var(--spacing-xs) var(--spacing-sm);gap:var(--spacing-xs)}.logo{gap:6px}.logo-img{height:28px}.logo-name{font-size:.88rem}.logo-tagline{font-size:.64rem}.header-right{gap:var(--spacing-xs)}.main{margin-top:56px}.nav{top:56px}.footer{padding:var(--spacing-lg) 0}.footer-bottom{padding-top:var(--spacing-md);margin-top:var(--spacing-md)}}@media(max-width:768px){.nav{visibility:hidden;opacity:0;pointer-events:none;transform:translate(-110%)}.nav.open{visibility:visible;opacity:1;pointer-events:auto;transform:translate(0)}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-xl);font-weight:600;border-radius:var(--radius-md);transition:var(--transition-fast);cursor:pointer;box-shadow:0 12px 28px -22px #0f172acc}.btn-primary{background:linear-gradient(135deg,var(--primary-purple),var(--primary-pink));color:#fff;border:1px solid rgba(255,255,255,.18);box-shadow:var(--shadow-md)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background-color:#ffffffeb;color:var(--text-dark);border:2px solid var(--bg-gray)}.btn-secondary:hover{border-color:var(--primary-purple);color:var(--primary-purple)}.card{background:linear-gradient(180deg,#fffffff5,#f8fbfff5);border-radius:var(--radius-lg);border:1px solid var(--surface-line);box-shadow:var(--shadow-sm);overflow:hidden;transition:var(--transition-normal)}.card:hover{transform:translateY(-4px);border-color:#06b6d44d;box-shadow:var(--shadow-lg)}.card-img{width:100%;height:200px;object-fit:cover}.card-body{padding:var(--spacing-lg)}.card-text{color:var(--text-gray);font-size:.95rem;line-height:1.6}.ad-banner{background:linear-gradient(135deg,var(--primary-purple),var(--primary-pink));border-radius:var(--radius-lg);padding:var(--spacing-xl);margin:var(--spacing-xl) 0;color:#fff;text-align:center}.ad-banner h3{font-size:1.5rem;margin-bottom:var(--spacing-sm)}.ad-banner p{font-size:1rem;opacity:.9;margin-bottom:var(--spacing-md)}.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background-color:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--shadow-sm)}.footer{background-color:var(--bg-light-gray);padding:var(--spacing-2xl) 0 var(--spacing-xl);margin-top:auto}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-xl);margin-bottom:var(--spacing-xl)}.footer-section h4{font-size:1.1rem;font-weight:700;margin-bottom:var(--spacing-md);color:var(--text-dark)}.footer-section ul{display:flex;flex-direction:column;gap:var(--spacing-sm)}.footer-section a{color:var(--primary-blue);font-size:.9rem;transition:var(--transition-fast)}.footer-section a:hover{color:var(--primary-purple)}.footer-bottom{text-align:center;padding-top:var(--spacing-lg);border-top:1px solid var(--bg-gray);color:var(--text-gray);font-size:.85rem}.ad-banner{background:linear-gradient(135deg,var(--primary-purple),var(--primary-pink));border-radius:var(--radius-lg);padding:var(--spacing-xl);margin:var(--spacing-lg) 0;color:#fff;text-align:center}.ad-content{max-width:600px;margin:0 auto}.ad-title{font-size:1.5rem;font-weight:700;margin-bottom:var(--spacing-sm)}.ad-description{font-size:1rem;opacity:.9;margin-bottom:var(--spacing-md)}.ad-button{display:inline-block;padding:var(--spacing-sm) var(--spacing-lg);background-color:#fff;color:var(--primary-purple);border-radius:var(--radius-md);font-weight:600;transition:var(--transition-fast)}.ad-button:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.card{background:linear-gradient(180deg,#fffffff5,#f8fbfff5);border-radius:var(--radius-lg);border:1px solid var(--surface-line);box-shadow:var(--shadow-sm);overflow:hidden;transition:var(--transition-normal);cursor:pointer}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.card-image{width:100%;height:200px;object-fit:cover}.card-content{padding:var(--spacing-lg)}.card-title{font-size:1.2rem;font-weight:700;margin-bottom:var(--spacing-sm);color:var(--text-dark)}.card-description{color:var(--text-gray);font-size:.95rem;line-height:1.5}@media(max-width:992px){.ad-banner{padding:var(--spacing-xl)}.ad-title{font-size:1.3rem}}@media(max-width:768px){.footer-content{grid-template-columns:1fr;gap:var(--spacing-lg)}.ad-banner{padding:var(--spacing-lg)}.ad-title{font-size:1.2rem}.ad-description{font-size:.9rem}.card{margin-bottom:var(--spacing-md)}}@media(max-width:576px){.ad-banner{padding:var(--spacing-md)}.ad-title{font-size:1.1rem}.ad-button{padding:var(--spacing-sm) var(--spacing-md);font-size:.9rem}.card-content{padding:var(--spacing-md)}.card-title{font-size:1.1rem}.card-image{height:160px}}