:root{--color-primary:#5c9ead;--color-primary-dark:#4a8a98;--color-primary-light:#7eb8c9;--color-accent:#e8a87c;--color-accent-dark:#d4956a;--color-text:#4a4a4a;--color-text-light:#8a8a8a;--color-bg:#f8f9fa;--color-bg-alt:#fefefe;--color-white:#ffffff;--color-border:#e5e9ec;--color-hover:#f0f4f5;--spacing-md:20px;--spacing-lg:30px;--spacing-xl:40px;--border-radius:16px;--shadow:0 4px 20px rgba(92, 158, 173, 0.12);--shadow-hover:0 8px 30px rgba(92, 158, 173, 0.2)}*,*::before,*::after{box-sizing:border-box}html{font-size:16px}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--color-text);background-color:var(--color-bg);line-height:1.6}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.site{max-width:1200px;margin:0 auto;background:var(--color-white);min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:0 15px}.site-header{background:var(--color-white);border-bottom:1px solid var(--color-border);padding:var(--spacing-md) 0;box-shadow:0 2px 10px rgb(0 0 0 / .03)}.site-header .container{display:flex;align-items:center;justify-content:space-between}.header-left{flex:1;display:flex;align-items:center;gap:12px}.site-header-text{display:flex;flex-direction:column;gap:2px;text-align:left}.site-logo{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-light) 100%);border-radius:10px;color:var(--color-white);flex-shrink:0;overflow:hidden}.site-logo img{width:100%;height:100%;object-fit:cover}.site-title{margin:0;font-size:1.5rem}.site-title a{color:var(--color-text)}.site-title a:hover{text-decoration:none}.site-description{margin:0;color:var(--color-text-light);font-size:.875rem}.header-search{flex-shrink:0}.header-search form{display:flex;align-items:center}.search-input{width:240px;height:42px;padding:10px 16px;border:2px solid var(--color-border);border-right:none;border-radius:21px 0 0 21px;font-size:.95rem;outline:none;transition:border-color 0.3s ease}.search-input:focus{border-color:var(--color-primary)}.search-input::placeholder{color:var(--color-text-light)}.search-btn{width:48px;height:42px;background:var(--color-primary);border:2px solid var(--color-primary);border-left:none;border-radius:0 21px 21px 0;color:var(--color-white);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background 0.3s ease}.search-btn:hover{background:var(--color-primary-dark);border-color:var(--color-primary-dark)}@media (max-width:768px){.site-header .container{flex-direction:column;align-items:stretch;gap:15px}.header-left{text-align:center}.header-search{width:100%}.header-search form{justify-content:center}.search-input{width:160px}.search-btn{width:42px}}.main-navigation{background:var(--color-white);border-bottom:1px solid var(--color-border);position:relative}.main-navigation .container{display:flex;align-items:center;justify-content:space-between}.main-navigation ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap}.main-navigation li{position:relative}.main-navigation a{display:block;padding:15px 20px;color:var(--color-text);transition:all 0.3s ease}.main-navigation a:hover{background:var(--color-primary);color:var(--color-white);text-decoration:none}.menu-toggle{display:none;align-items:center;gap:8px;padding:10px 18px;background:var(--color-primary);border:none;border-radius:var(--border-radius);color:var(--color-white);cursor:pointer;font-size:.95rem;font-weight:500;transition:all 0.3s ease}.menu-toggle:hover{background:var(--color-primary-dark);transform:scale(1.02)}.menu-toggle .menu-icon{font-size:1.2rem}.menu-toggle .menu-text{font-family:inherit}.main-navigation .sub-menu{display:none;position:absolute;top:100%;left:0;background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--border-radius);min-width:220px;box-shadow:var(--shadow);z-index:100}.main-navigation li:hover>.sub-menu{display:block}.main-navigation .sub-menu a{padding:12px 20px;border-bottom:1px solid var(--color-border)}.main-navigation .sub-menu li:last-child a{border-bottom:none}.site-content{padding:var(--spacing-md) 15px}.entry-title{margin:0 0 15px;font-size:2rem;line-height:1.3}.entry-title a{color:var(--color-text)}.entry-meta{color:var(--color-text-light);font-size:.875rem;margin-bottom:20px}.entry-content{line-height:1.8;padding-right:10px;padding-top:var(--spacing-lg);border-top:1px solid var(--color-border)}.entry-footer{margin-top:20px;padding-top:15px;border-top:1px solid var(--color-border)}.entry-footer-cats{margin-top:15px;padding:12px 10px;background:var(--color-bg);border-radius:var(--border-radius)}.entry-footer-cats .cat-links,.entry-footer-cats .tags-links{display:inline-block;margin-right:15px;color:var(--color-text-light);font-size:.875rem}.entry-footer-cats .cat-links a,.entry-footer-cats .tags-links a{display:inline-block;padding:4px 12px;margin:2px;background:var(--color-white);border:1px solid var(--color-border);border-radius:20px;color:var(--color-text);font-size:.8rem;transition:all 0.3s ease}.entry-footer-cats .cat-links a:hover,.entry-footer-cats .tags-links a:hover{background:var(--color-primary);border-color:var(--color-primary);color:var(--color-white);text-decoration:none}.book-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin:0;padding:0;list-style:none}.book-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--border-radius);overflow:hidden;transition:all 0.3s ease}.book-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}.book-card-cover{width:100%;height:200px;object-fit:contain;background:linear-gradient(160deg,#f0f7f9 0%,#e8f1f3 100%)}.book-card-cover-placeholder{width:100%;height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(160deg,#f0f7f9 0%,#e8f1f3 100%);color:var(--color-primary);font-size:.75rem}.book-card-cover-placeholder svg{margin-bottom:8px;width:40px;height:40px;color:var(--color-primary-light)}.book-card-content{padding:12px}.book-card-title{margin:0 0 6px;font-size:.9rem;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.book-card-title a{color:var(--color-text)}.book-card-excerpt{color:var(--color-text-light);font-size:.75rem;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.book-detail{display:grid;grid-template-columns:300px 1fr;gap:var(--spacing-md);padding:var(--spacing-md) 10px}.book-detail-info{padding:0 10px}.book-detail-info h1{margin:0 0 20px;font-size:2rem;padding-right:10px}.book-cover{width:100%;max-width:280px}.book-cover .book-card-cover{width:100%;height:380px;object-fit:contain;background:linear-gradient(160deg,#f0f7f9 0%,#e8f1f3 100%);border-radius:var(--border-radius);padding:10px;box-shadow:var(--shadow)}.book-cover .book-card-cover-placeholder{width:100%;height:380px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(160deg,#f0f7f9 0%,#e8f1f3 100%);border-radius:var(--border-radius);color:var(--color-primary);box-shadow:var(--shadow)}.book-detail-info h1{margin:0 0 20px;font-size:2rem}.book-meta-list{list-style:none;margin:0 0 30px;padding:0}.book-meta-list li{padding:12px 0;border-bottom:1px solid var(--color-border);display:flex}.book-meta-label{font-weight:600;color:var(--color-text-light);min-width:100px}.book-download-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 32px;margin:5px auto;background:var(--color-primary);color:#fff;border-radius:8px;font-size:1rem;font-weight:500;transition:all 0.25s ease;box-shadow:0 2px 8px rgb(26 115 232 / .25);border:none}.book-download-btn:hover{background:var(--color-primary-dark);text-decoration:none;transform:translateY(-1px);box-shadow:0 4px 12px rgb(26 115 232 / .35)}.book-download-btn:active{transform:translateY(0);box-shadow:0 1px 4px rgb(26 115 232 / .2)}.book-download-btn svg{flex-shrink:0}.back-to-top{position:fixed;bottom:30px;right:30px;padding:10px 16px;background:var(--color-primary);border:none;border-radius:8px;color:var(--color-white);cursor:pointer;font-size:.9rem;font-weight:500;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(20px);transition:all 0.3s ease;z-index:999}.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top:hover{background:var(--color-primary-dark);transform:translateY(-3px);box-shadow:var(--shadow-hover)}.book-nav-links{margin-top:40px;padding-top:30px;border-top:1px solid var(--color-border);text-align:center}.back-home{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:50px;color:var(--color-text);transition:all 0.3s ease}.back-home:hover{background:var(--color-primary);border-color:var(--color-primary);color:var(--color-white);text-decoration:none;transform:translateY(-2px)}.site-footer{background:var(--color-bg);color:var(--color-text);padding:var(--spacing-lg) 0;text-align:center;border-top:1px solid var(--color-border)}.site-footer a{color:var(--color-primary)}.site-footer a:hover{color:var(--color-primary-dark)}.site-disclaimer{margin:1px 0 0;padding:8px 12px;background:rgb(232 168 124 / 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var(--border-radius);font-size:1rem;transition:border-color 0.3s ease}.search-form input[type="search"]:focus{outline:none;border-color:var(--color-primary)}.search-form button{padding:12px 24px;background:var(--color-primary);color:var(--color-white);border:none;border-radius:0 var(--border-radius) var(--border-radius) 0;cursor:pointer;transition:all 0.3s ease}.search-form button:hover{background:var(--color-accent)}.pagination,.post-navigation{margin-top:var(--spacing-xl);text-align:center}.pagination .page-numbers{display:inline-block;padding:10px 18px;background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--border-radius);margin:0 4px;transition:all 0.3s ease}.pagination .page-numbers:hover{background:var(--color-primary-light);color:var(--color-white);border-color:var(--color-primary-light)}.pagination .page-numbers.current{background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}@media (max-width:1200px){.book-grid{grid-template-columns:repeat(4,1fr)}}@media (max-width:992px){.book-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width:768px){.book-detail{grid-template-columns:1fr}.book-cover{max-width:220px;margin:0 auto}.book-cover .book-card-cover,.book-cover .book-card-cover-placeholder{height:300px}.book-grid{grid-template-columns:repeat(2,1fr);gap:15px}.book-card-cover,.book-card-cover-placeholder{height:180px}.main-navigation .container{flex-wrap:wrap;padding:10px 20px}.menu-toggle{display:flex}.main-navigation ul{display:none;width:100%;flex-direction:column;padding:10px 0;border-top:1px solid var(--color-border)}.main-navigation ul.toggled{display:flex}.main-navigation li{width:100%}.main-navigation a{padding:14px 20px;border-bottom:1px solid var(--color-border);background:var(--color-white)}.main-navigation a:hover{background:var(--color-primary);color:var(--color-white)}.main-navigation .sub-menu{position:static;box-shadow:none;border:none;border-radius:0;background:var(--color-bg);display:none}.main-navigation li:hover>.sub-menu,.main-navigation .sub-menu.toggled{display:block}.main-navigation .sub-menu a{padding-left:40px;background:var(--color-bg)}.site-header .container{flex-direction:column;text-align:center}}@media (max-width:480px){.container{padding:0 10px}.book-grid{grid-template-columns:repeat(2,1fr);gap:10px}.book-download-btn{display:block;text-align:center}.not-found h1,.no-results h1{font-size:3rem}.menu-toggle{width:100%;justify-content:center}.book-card-cover,.book-card-cover-placeholder{height:160px}}.clearfix::after{content:"";display:table;clear:both}.screen-reader-text{border:0;clip:rect(1px,1px,1px,1px);clip-path:inset(50%);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;word-wrap:normal!important}.screen-reader-text:focus{background-color:#f1f1f1;border-radius:3px;box-shadow:0 0 2px 2px rgb(0 0 0 / .6);clip:auto!important;clip-path:none;color:#21759b;display:block;font-size:14px;font-weight:700;height:auto;left:5px;line-height:normal;padding:15px 23px 14px;text-decoration:none;top:5px;width:auto;z-index:100000}.page-header{margin-bottom:var(--spacing-lg);padding:var(--spacing-md) 0 var(--spacing-md) 20px;border-bottom:1px solid var(--color-border);border-left:4px solid var(--color-primary)}.page-title{margin:0;font-size:2rem}.archive-description{margin-top:var(--spacing-md);color:var(--color-text-light)}.comments-area{margin-top:var(--spacing-xl);padding-top:var(--spacing-lg);border-top:1px solid var(--color-border)}