/* ===== NovelPro — App-Like Modern Novel Template ===== */
/* Reset */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.6;color:var(--text);background:var(--bg);min-height:100vh;display:flex;flex-direction:column;transition:background .3s,color .3s}
a{color:var(--link);text-decoration:none;transition:color .2s}
a:hover{color:var(--link-hover)}
ul,ol{list-style:none}
img{max-width:100%;height:auto;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit;outline:none}
.clearfix::after{content:'';display:table;clear:both}

/* ===== CSS Variables (Light Theme) ===== */
:root{
  --bg:#f5f6fa;--bg-card:#fff;--bg-header:#1a1c2e;--bg-nav:#252842;
  --text:#2d3436;--text-secondary:#636e72;--text-muted:#b2bec3;
  --link:#6c5ce7;--link-hover:#a29bfe;
  --accent:#6c5ce7;--accent-light:#a29bfe;--accent-bg:rgba(108,92,231,.08);
  --border:#eee;--border-light:#f0f0f0;
  --shadow:0 2px 12px rgba(0,0,0,.06);--shadow-hover:0 4px 20px rgba(0,0,0,.1);
  --radius:10px;--radius-sm:6px;
  --header-height:60px;--nav-height:46px;
  --max-width:1200px;
  --success:#00b894;--warning:#fdcb6e;--danger:#d63031;
  --bottom-nav-height:58px;
  --drawer-width:300px;
}

/* Dark Theme */
body.dark{
  --bg:#1a1c2e;--bg-card:#252842;--bg-header:#13142b;--bg-nav:#1e2039;
  --text:#dfe6e9;--text-secondary:#b2bec3;--text-muted:#636e72;
  --link:#a29bfe;--link-hover:#6c5ce7;
  --border:#353760;--border-light:#2d3055;
  --shadow:0 2px 12px rgba(0,0,0,.2);--shadow-hover:0 4px 20px rgba(0,0,0,.3);
  --accent-bg:rgba(108,92,231,.15);
}

/* ===== Layout ===== */
.container{max-width:var(--max-width);margin:0 auto;padding:0 16px;width:100%}
.main-content{flex:1;padding:20px 0;overflow:hidden}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid>*{min-width:0}

/* ===== Ad Banner ===== */
.ad-banner{margin:0 0 20px 0}
.ad-banner:empty{display:none;margin:0}

/* ===== Header ===== */
.site-header{background:var(--bg-header);color:#fff;position:sticky;top:0;z-index:1000;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;height:var(--header-height);gap:16px}
.site-logo{font-size:1.3rem;font-weight:700;color:#fff;white-space:nowrap;letter-spacing:1px;overflow:hidden;text-overflow:ellipsis;max-width:220px;flex-shrink:1;min-width:0}
.site-logo:hover{color:var(--accent-light)}
.header-search{flex:1;max-width:420px;margin:0 auto;position:relative}
.header-search input{width:100%;padding:8px 40px 8px 16px;border:none;border-radius:20px;background:rgba(255,255,255,.12);color:#fff;font-size:.9rem;transition:background .2s}
.header-search input::placeholder{color:rgba(255,255,255,.5)}
.header-search input:focus{background:rgba(255,255,255,.2)}
.header-search button{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:var(--accent);color:#fff;border:none;border-radius:50%;width:30px;height:30px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}
.header-search button:hover{background:var(--accent-light)}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.header-actions a{color:rgba(255,255,255,.8);font-size:.85rem;white-space:nowrap;transition:color .2s}
.header-actions a:hover{color:#fff}
.header-actions .btn-login{padding:5px 16px;border-radius:16px;background:var(--accent);color:#fff;font-size:.8rem}
.header-actions .btn-login:hover{background:var(--accent-light)}

/* ===== Navigation ===== */
.site-nav{background:var(--bg-nav);border-bottom:1px solid var(--border-light)}
.nav-inner{display:flex;align-items:center;height:var(--nav-height);gap:0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.nav-inner::-webkit-scrollbar{display:none}
.nav-inner a{color:rgba(255,255,255,.75);padding:0 16px;font-size:.88rem;white-space:nowrap;height:100%;display:flex;align-items:center;transition:color .2s,background .2s;border-bottom:2px solid transparent}
.nav-inner a:hover,.nav-inner a.active{color:#fff;background:rgba(255,255,255,.06);border-bottom-color:var(--accent)}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:12px 0;font-size:.82rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb span{margin:0 6px;color:var(--text-muted)}

/* ===== Card ===== */
.card{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:var(--shadow-hover)}
.card-header{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.card-header h2,.card-header h3{font-size:1rem;font-weight:600;color:var(--text);display:flex;align-items:center;gap:8px}
.card-header h2::before,.card-header h3::before{content:'';width:4px;height:18px;background:var(--accent);border-radius:2px}
.card-header .more{font-size:.8rem;color:var(--text-muted)}
.card-body{padding:18px}

/* ===== Book Item ===== */
.book-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--border-light)}
.book-item:last-child{border-bottom:none}
.book-cover{width:80px;min-width:80px;border-radius:var(--radius-sm);overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.1);aspect-ratio:3/4}
.book-cover img{width:100%;height:100%;object-fit:cover}
.book-info{flex:1;min-width:0}
.book-info h3{font-size:.95rem;font-weight:600;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.book-info h3 a{color:var(--text)}
.book-info h3 a:hover{color:var(--accent)}
.book-meta{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:.78rem;color:var(--text-secondary);margin-bottom:6px}
.book-meta .tag{display:inline-block;padding:1px 8px;border-radius:10px;background:var(--accent-bg);color:var(--accent);font-size:.72rem}
.book-desc{font-size:.82rem;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}

/* Book Grid */
.book-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;padding:14px 0}
.book-grid-item{text-align:center;min-width:0}
.book-grid-item .cover{width:100%;aspect-ratio:3/4;border-radius:var(--radius-sm);overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.1);margin-bottom:8px;position:relative;background:var(--border-light)}
.book-grid-item .cover img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .3s}
.book-grid-item:hover .cover img{transform:scale(1.05)}
.book-grid-item .title{font-size:.85rem;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}

/* ===== Chapter List ===== */
.chapter-list{columns:2;column-gap:20px;padding:14px 0}
.chapter-list a{display:block;padding:7px 0;font-size:.85rem;color:var(--text-secondary);border-bottom:1px dashed var(--border-light);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;break-inside:avoid}
.chapter-list a:hover{color:var(--accent)}
.chapter-list a.current{color:var(--accent);font-weight:600}

/* ===== Reading Page ===== */
.reader-wrap{max-width:800px;margin:0 auto;padding:20px 0}
.reader-title{text-align:center;padding:16px 0;border-bottom:1px solid var(--border)}
.reader-title h1{font-size:1.2rem;font-weight:600;margin-bottom:6px}
.reader-title .meta{font-size:.8rem;color:var(--text-muted)}
.reader-toolbar{display:flex;justify-content:center;gap:16px;padding:12px 0;flex-wrap:wrap}
.reader-toolbar .tool-btn{padding:4px 14px;border-radius:var(--radius-sm);background:var(--bg);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;font-size:.8rem;transition:all .2s}
.reader-toolbar .tool-btn:hover,.reader-toolbar .tool-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.reader-content{padding:24px 0;font-size:1.05rem;line-height:2;color:var(--text);word-break:break-word}
.reader-content p{text-indent:2em;margin-bottom:.6em}
.reader-nav{display:flex;justify-content:space-between;align-items:center;padding:16px 0;gap:10px;border-top:1px solid var(--border)}
.reader-nav a{flex:1;text-align:center;padding:10px 0;border-radius:var(--radius-sm);background:var(--bg-card);border:1px solid var(--border);color:var(--text);font-size:.88rem;transition:all .2s}
.reader-nav a:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.reader-nav a.catalog-btn{flex:0 0 auto;padding:10px 20px;background:var(--accent);color:#fff;border-color:var(--accent)}
.reader-nav a.catalog-btn:hover{background:var(--accent-light)}
.reader-content.fs-s{font-size:.9rem}
.reader-content.fs-m{font-size:1.05rem}
.reader-content.fs-l{font-size:1.2rem}
.reader-content.fs-xl{font-size:1.4rem}

/* ===== Chapter Drawer (Left Slide) ===== */
.chapter-drawer-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.55);z-index:2100;transition:opacity .3s}
.chapter-drawer-overlay.show{display:block}
.chapter-drawer{position:fixed;top:0;left:calc(-1 * var(--drawer-width));width:var(--drawer-width);height:100%;background:var(--bg-card);z-index:2101;transition:left .3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;box-shadow:none}
.chapter-drawer.open{left:0;box-shadow:6px 0 30px rgba(0,0,0,.25)}
.chapter-drawer-header{padding:18px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0;background:var(--bg-header);color:#fff}
.chapter-drawer-header h3{font-size:.95rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1;margin-right:8px}
.chapter-drawer-close{background:none;border:none;font-size:1.6rem;color:rgba(255,255,255,.7);cursor:pointer;padding:0 4px;line-height:1;transition:color .2s}
.chapter-drawer-close:hover{color:#fff}
.chapter-drawer-body{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}
.chapter-drawer-item{display:block;padding:13px 16px;font-size:.86rem;color:var(--text-secondary);border-bottom:1px solid var(--border-light);transition:all .15s}
.chapter-drawer-item:active{background:var(--accent-bg)}
.chapter-drawer-item.current{color:var(--accent);font-weight:600;background:var(--accent-bg);border-left:3px solid var(--accent);padding-left:13px}

/* ===== Book Detail ===== */
.book-detail{display:flex;gap:24px;padding:20px 0}
.book-detail .cover{width:160px;min-width:160px;border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.12);aspect-ratio:3/4}
.book-detail .cover img{width:100%;height:100%;object-fit:cover}
.book-detail .info{flex:1}
.book-detail .info h1{font-size:1.5rem;font-weight:700;margin-bottom:10px}
.book-detail .info-row{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:.85rem;color:var(--text-secondary);margin-bottom:8px}
.book-detail .info-row span{display:flex;align-items:center;gap:4px}
.book-detail .info-row .label{color:var(--text-muted)}
.book-detail .synopsis{font-size:.88rem;color:var(--text-secondary);line-height:1.7;margin-top:12px;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.book-detail .synopsis.expanded{-webkit-line-clamp:unset}
.book-detail .actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.book-detail .actions a,.book-detail .actions button{padding:8px 24px;border-radius:20px;font-size:.88rem;border:none;cursor:pointer;transition:all .2s}
.btn-primary{background:var(--accent);color:#fff!important}
.btn-primary:hover{background:var(--accent-light)}
.btn-outline{background:transparent;color:var(--accent)!important;border:1.5px solid var(--accent)!important}
.btn-outline:hover{background:var(--accent-bg)}

/* ===== Tags ===== */
.tag-list{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.tag-item{display:inline-block;padding:3px 10px;border-radius:12px;background:var(--accent-bg);color:var(--accent);font-size:.75rem;transition:background .2s}
.tag-item:hover{background:rgba(108,92,231,.18)}

/* ===== Pagination ===== */
.pagination{display:flex;justify-content:center;align-items:center;gap:6px;padding:20px 0;flex-wrap:wrap}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:34px;padding:0 10px;border-radius:var(--radius-sm);font-size:.82rem;border:1px solid var(--border);color:var(--text-secondary);transition:all .2s}
.pagination a:hover{background:var(--accent-bg);color:var(--accent);border-color:var(--accent)}
.pagination .current{background:var(--accent);color:#fff;border-color:var(--accent)}
.pagination .disabled{opacity:.4;pointer-events:none}

/* ===== Search ===== */
.search-box{max-width:600px;margin:30px auto;position:relative}
.search-box input{width:100%;padding:14px 50px 14px 20px;border:2px solid var(--border);border-radius:25px;background:var(--bg-card);color:var(--text);font-size:1rem;transition:border-color .2s}
.search-box input:focus{border-color:var(--accent)}
.search-box button{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:var(--accent);color:#fff;border:none;border-radius:50%;width:38px;height:38px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.search-results .count{padding:12px 0;font-size:.85rem;color:var(--text-muted)}

/* ===== Sort / Category ===== */
.sort-tabs{display:flex;flex-wrap:wrap;gap:8px;padding:14px 0}
.sort-tabs a{padding:6px 16px;border-radius:16px;font-size:.82rem;color:var(--text-secondary);background:var(--bg);border:1px solid var(--border);transition:all .2s}
.sort-tabs a:hover,.sort-tabs a.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ===== Ranking ===== */
.rank-tabs{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:16px}
.rank-tabs a{padding:10px 20px;font-size:.88rem;color:var(--text-secondary);border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .2s}
.rank-tabs a:hover,.rank-tabs a.active{color:var(--accent);border-bottom-color:var(--accent)}
.rank-num{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;font-size:.7rem;font-weight:700;margin-right:6px}
.rank-num.top1{background:#ffd700;color:#fff}
.rank-num.top2{background:#c0c0c0;color:#fff}
.rank-num.top3{background:#cd7f32;color:#fff}
.rank-num.normal{background:var(--bg);color:var(--text-muted)}

/* ===== User Pages ===== */
.user-layout{display:flex;gap:20px}
.user-sidebar{width:200px;min-width:200px}
.user-sidebar .menu{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.user-sidebar .menu a{display:block;padding:12px 18px;font-size:.88rem;color:var(--text-secondary);border-bottom:1px solid var(--border-light);transition:all .2s}
.user-sidebar .menu a:hover,.user-sidebar .menu a.active{color:var(--accent);background:var(--accent-bg)}
.user-main{flex:1}
.login-form,.register-form{max-width:420px;margin:40px auto;padding:30px;background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow)}
.login-form h2,.register-form h2{text-align:center;margin-bottom:24px;font-size:1.3rem}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.85rem;color:var(--text-secondary);margin-bottom:6px}
.form-group input{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);transition:border-color .2s}
.form-group input:focus{border-color:var(--accent)}
.form-tips{text-align:center;padding:8px;font-size:.82rem;color:var(--danger);min-height:30px}
.form-btn{width:100%;padding:11px;border:none;border-radius:var(--radius-sm);background:var(--accent);color:#fff;font-size:.95rem;cursor:pointer;transition:background .2s}
.form-btn:hover{background:var(--accent-light)}
.form-link{text-align:center;margin-top:14px;font-size:.82rem}
.form-link a{color:var(--accent)}

/* ===== Bookshelf ===== */
.bookcase-table{width:100%;border-collapse:collapse}
.bookcase-table th{padding:10px;text-align:left;font-size:.82rem;color:var(--text-muted);border-bottom:2px solid var(--border);font-weight:600}
.bookcase-table td{padding:10px;font-size:.85rem;color:var(--text-secondary);border-bottom:1px solid var(--border-light)}
.bookcase-table a{color:var(--link)}
.bookcase-table .del-btn{color:var(--danger);cursor:pointer;font-size:.8rem}

/* ===== Footer ===== */
.site-footer{background:var(--bg-header);color:rgba(255,255,255,.5);padding:20px 0;text-align:center;font-size:.78rem;margin-top:auto}
.site-footer a{color:rgba(255,255,255,.6)}
.site-footer a:hover{color:#fff}

/* ===== Utilities ===== */
.text-center{text-align:center}
.text-accent{color:var(--accent)}
.mt-10{margin-top:10px}.mt-20{margin-top:20px}
.mb-10{margin-bottom:10px}.mb-20{margin-bottom:20px}
.hidden{display:none!important}
.desktop-only{display:flex}

/* ===== PWA Center Modal ===== */
.pwa-modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);z-index:3000;justify-content:center;align-items:center}
.pwa-modal-overlay.show{display:flex}
.pwa-modal{background:var(--bg-card);border-radius:16px;padding:36px 28px;text-align:center;width:88%;max-width:320px;position:relative;box-shadow:0 8px 40px rgba(0,0,0,.25);animation:modalFadeIn .35s ease}
.pwa-modal-close{position:absolute;top:10px;right:14px;background:none;border:none;font-size:1.5rem;color:var(--text-muted);cursor:pointer;line-height:1;transition:color .2s}
.pwa-modal-close:hover{color:var(--text)}
.pwa-modal-icon{margin-bottom:16px}
.pwa-modal-text{font-size:.92rem;color:var(--text-secondary);margin-bottom:20px;line-height:1.6}
.pwa-modal-btn{padding:10px 36px;border-radius:24px;background:linear-gradient(135deg,var(--accent),var(--accent-light));color:#fff;border:none;font-size:.92rem;font-weight:600;cursor:pointer;transition:transform .15s,box-shadow .2s;box-shadow:0 4px 16px rgba(108,92,231,.3)}
.pwa-modal-btn:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(108,92,231,.4)}
.pwa-modal-btn:active{transform:scale(.97)}
@keyframes modalFadeIn{from{opacity:0;transform:scale(.9) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}

/* ===== Search Overlay ===== */
.search-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:2500}
.search-overlay.show{display:block}
.search-overlay-bg{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.search-overlay-box{position:absolute;top:0;left:0;right:0;background:var(--bg-header);padding:16px;display:flex;align-items:center;gap:10px;box-shadow:0 4px 24px rgba(0,0,0,.3);animation:searchSlideDown .25s ease}
@keyframes searchSlideDown{from{transform:translateY(-100%)}to{transform:translateY(0)}}
.search-overlay-form{flex:1;display:flex;align-items:center;gap:8px}
.search-overlay-input-wrap{flex:1;position:relative;display:flex;align-items:center}
.search-overlay-icon{position:absolute;left:12px;color:rgba(255,255,255,.4);pointer-events:none}
.search-overlay-input-wrap input{width:100%;padding:12px 16px 12px 40px;border:none;border-radius:12px;background:rgba(255,255,255,.12);color:#fff;font-size:1rem;transition:background .2s}
.search-overlay-input-wrap input::placeholder{color:rgba(255,255,255,.4)}
.search-overlay-input-wrap input:focus{background:rgba(255,255,255,.18)}
.search-overlay-submit{padding:10px 20px;border-radius:12px;background:var(--accent);color:#fff;border:none;font-size:.9rem;font-weight:500;cursor:pointer;white-space:nowrap;transition:background .2s}
.search-overlay-submit:hover{background:var(--accent-light)}
.search-overlay-close{background:none;border:none;font-size:1.8rem;color:rgba(255,255,255,.6);cursor:pointer;line-height:1;padding:0 4px;transition:color .2s}
.search-overlay-close:hover{color:#fff}

/* ===== Login Modal ===== */
.login-modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);z-index:3000;justify-content:center;align-items:center}
.login-modal-overlay.show{display:flex}
.login-modal{background:var(--bg-card);border-radius:16px;padding:32px 24px;width:88%;max-width:380px;position:relative;box-shadow:0 8px 40px rgba(0,0,0,.25);animation:modalFadeIn .35s ease}
.login-modal-close{position:absolute;top:10px;right:14px;background:none;border:none;font-size:1.5rem;color:var(--text-muted);cursor:pointer;line-height:1;transition:color .2s}
.login-modal-close:hover{color:var(--text)}
.login-modal-header{text-align:center;margin-bottom:24px}
.login-modal-header svg{margin-bottom:8px;opacity:.8}
.login-modal-header h3{font-size:1.2rem;font-weight:600;color:var(--text)}
.login-modal .form-group input{padding:12px 14px;border-radius:10px;font-size:.95rem}
.login-modal .form-btn{border-radius:10px;padding:12px;font-size:1rem;margin-top:4px;background:linear-gradient(135deg,var(--accent),var(--accent-light));box-shadow:0 4px 16px rgba(108,92,231,.25);transition:transform .15s,box-shadow .2s}
.login-modal .form-btn:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(108,92,231,.35)}
.login-modal .form-link{margin-top:18px}
.login-modal .form-link a{font-size:.88rem;font-weight:500}

/* ===== Language Float Button ===== */
#lang-float-btn{position:fixed;right:16px;top:50%;transform:translateY(-50%);width:42px;height:42px;line-height:42px;background:var(--bg-card);color:var(--text);font-size:.82rem;font-weight:600;text-align:center;border-radius:50%;box-shadow:var(--shadow);cursor:pointer;z-index:999;transition:all .3s;user-select:none}
#lang-float-btn:hover{box-shadow:var(--shadow-hover);transform:translateY(-50%) scale(1.08)}

/* ===== 404 ===== */
.page-404{text-align:center;padding:80px 20px}
.page-404 h1{font-size:5rem;font-weight:700;color:var(--accent);margin-bottom:10px}
.page-404 p{font-size:1.1rem;color:var(--text-muted);margin-bottom:24px}
.page-404 a{display:inline-block;padding:10px 30px;border-radius:20px;background:var(--accent);color:#fff}

/* ===== Recently Updated ===== */
.update-list a{display:flex;justify-content:space-between;padding:10px 0;font-size:.85rem;color:var(--text-secondary);border-bottom:1px solid var(--border-light)}
.update-list a:hover{color:var(--accent)}
.update-list .desc{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-right:12px;font-weight:500;color:var(--text)}

/* ===== Mobile Bottom Nav & Settings (hidden on desktop) ===== */
.mobile-bottom-nav{display:none}
.mobile-settings-panel{display:none}

/* ===== Responsive: 1024px ===== */
@media(max-width:1024px){
  .user-layout{flex-direction:column}
  .user-sidebar{width:100%;min-width:auto}
  .user-sidebar .menu{display:flex;flex-wrap:wrap}
  .user-sidebar .menu a{flex:1;text-align:center;border-bottom:none;border-right:1px solid var(--border-light)}
  .user-sidebar .menu a:last-child{border-right:none}
}

/* ===== Responsive: 768px — Mobile App Layout ===== */
@media(max-width:768px){
  :root{--header-height:50px;--nav-height:40px;--drawer-width:280px}
  .container{padding:0 12px}

  /* 手机端头部：仅显示Logo */
  .site-logo{font-size:1.1rem;max-width:none;flex:1}
  .header-inner{gap:8px}

  /* 导航抽屉 (分类) */
  .site-nav{position:fixed;top:0;left:-280px;width:280px;height:100vh;background:var(--bg-nav);z-index:2000;overflow-y:auto;transition:left .3s ease;box-shadow:none;border-bottom:none}
  .site-nav.mobile-open{left:0;box-shadow:4px 0 20px rgba(0,0,0,.3)}
  .site-nav .nav-inner{flex-direction:column;height:auto;padding:16px 0;gap:0;overflow-x:visible}
  .site-nav .nav-inner a{height:auto;padding:13px 20px;font-size:.92rem;border-bottom:1px solid rgba(255,255,255,.06);justify-content:flex-start;white-space:normal}
  .site-nav .nav-inner a:hover,.site-nav .nav-inner a.active{background:rgba(255,255,255,.1)}
  .nav-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.45);z-index:1999}
  .nav-overlay.show{display:block}

  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .book-detail{flex-direction:column;align-items:center;text-align:center}
  .book-detail .cover{width:130px}
  .book-detail .info-row{justify-content:center}
  .book-detail .actions{justify-content:center}
  .book-detail .synopsis{text-align:left}
  .chapter-list{columns:1}
  .reader-content{font-size:1rem;line-height:1.9;padding:16px 0}
  .book-grid{grid-template-columns:repeat(3,1fr);gap:12px}
  .login-form,.register-form{margin:20px auto;padding:20px}

  /* 隐藏桌面端元素 */
  .desktop-only{display:none!important}

  /* 语言按钮调整 */
  #lang-float-btn{top:auto;bottom:calc(var(--bottom-nav-height) + 16px);right:12px;transform:none;width:36px;height:36px;line-height:36px;font-size:.76rem}
  #lang-float-btn:hover{transform:scale(1.05)}

  /* 阅读页隐藏浮动TTS按钮 */
  .reader-page #tts-toggle-btn{display:none!important}

  /* body底部留空 */
  body{padding-bottom:var(--bottom-nav-height)}
  .site-footer{padding-bottom:calc(var(--bottom-nav-height) + 10px)}

  /* 阅读页隐藏通用导航 */
  .reader-page .general-bottom-nav{display:none!important}

  /* ===== 手机底部悬浮导航栏（APP风格） ===== */
  .mobile-bottom-nav{
    display:flex;position:fixed;bottom:0;left:0;right:0;
    height:var(--bottom-nav-height);
    background:linear-gradient(180deg,#1e2039 0%,#171930 100%);
    border-top:1px solid rgba(255,255,255,.06);
    z-index:1500;
    box-shadow:0 -4px 24px rgba(0,0,0,.2);
    justify-content:space-around;align-items:center;
    padding-bottom:env(safe-area-inset-bottom,0px);
  }
  .bottom-nav-item{
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:2px;flex:1;padding:6px 0;
    color:rgba(255,255,255,.5);font-size:.58rem;letter-spacing:.02em;
    text-decoration:none;transition:color .2s;
    -webkit-tap-highlight-color:transparent;
    position:relative;
  }
  .bottom-nav-item svg{width:21px;height:21px;transition:transform .15s}
  .bottom-nav-item:active svg{transform:scale(.88)}
  .bottom-nav-item span{line-height:1;margin-top:1px}
  .bottom-nav-item.active{color:var(--accent-light)}
  .bottom-nav-item.active::after{
    content:'';position:absolute;top:2px;left:50%;transform:translateX(-50%);
    width:16px;height:2.5px;background:var(--accent);border-radius:2px;
  }
  /* 收藏/推荐成功状态 */
  .bottom-nav-item.done{color:var(--success)}

  /* ===== 阅读页底部导航栏增强 ===== */
  .reader-bottom-nav{
    background:linear-gradient(180deg,#1a1c30 0%,#14162a 100%);
    border-top:1px solid rgba(108,92,231,.15);
    box-shadow:0 -6px 30px rgba(0,0,0,.25);
  }

  /* ===== 手机设置面板 ===== */
  .mobile-settings-panel{
    position:fixed;bottom:var(--bottom-nav-height);left:0;right:0;
    background:var(--bg-card);border-top:1px solid var(--border);
    z-index:1499;padding:18px 16px;
    box-shadow:0 -4px 20px rgba(0,0,0,.12);
    display:none;
    border-radius:16px 16px 0 0;
    animation:settingsSlideUp .25s ease;
  }
  .mobile-settings-panel.show{display:block}
  @keyframes settingsSlideUp{from{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}
  .settings-row{display:flex;align-items:center;gap:12px;padding:10px 0}
  .settings-label{font-size:.84rem;color:var(--text-secondary);min-width:45px;font-weight:500}
  .settings-btns{display:flex;gap:8px;flex-wrap:wrap}
  .settings-btns .tool-btn{
    padding:7px 18px;border-radius:20px;
    background:var(--bg);border:1px solid var(--border);
    color:var(--text-secondary);cursor:pointer;font-size:.82rem;
    transition:all .2s;
  }
  .settings-btns .tool-btn:hover,.settings-btns .tool-btn.active{
    background:var(--accent);color:#fff;border-color:var(--accent);
  }

  /* 最近更新手机端 */
  .update-list a{flex-direction:column;gap:2px;align-items:flex-start}
  .update-list .desc{white-space:normal;font-size:.88rem}
  .update-list .book-meta{font-size:.75rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
}

@media(max-width:480px){
  .reader-nav{flex-wrap:wrap}
  .reader-nav a{min-width:0}
  .bookcase-table .hide-mobile{display:none}
  .book-grid{grid-template-columns:repeat(3,1fr);gap:10px}
  .bottom-nav-item{font-size:.54rem}
  .bottom-nav-item svg{width:20px;height:20px}
}