.tt-root{--font-ui: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;--font-read: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", "Georgia", serif;--primary: #6B4C35;--primary-light: #A67C5B;--primary-bg: #FDF8F3;--accent: #E8A87C;--accent-soft: #FFF0E5;--accent-fill: rgba(232, 168, 124, .18);--accent2: #C98754;--success: #5BA573;--paper: #FDF8F3;--paper-2: #F3ECE3;--card: #FFFFFF;--ink: #2D2926;--ink-soft: #7A706A;--ink-faint: #B5ADA6;--radius: 16px;--shadow-card: 0 2px 10px rgba(107, 76, 53, .06), 0 1px 3px rgba(107, 76, 53, .05);--shadow-float: 0 8px 24px rgba(107, 76, 53, .14)}.tt-root *{box-sizing:border-box;-webkit-tap-highlight-color:transparent}.tt-root button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}.tt-root .shelf{max-width:900px;margin:0 auto;padding:0 14px 64px}.tt-root .shelf-bar{position:sticky;top:0;z-index:30;display:flex;align-items:center;margin:0 0 12px;padding:calc(env(safe-area-inset-top,0px) + 8px) 0 8px;background:#fdf8f3eb;backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid rgba(107,76,53,.08)}.tt-root .tt-home{border:none;background:transparent;color:var(--primary);font-size:15px;font-weight:600;padding:4px 2px;cursor:pointer}.tt-root .shelf-head{text-align:center;margin-bottom:18px;padding:6px 0 4px}.tt-root .shelf-head h1{font-family:var(--font-read);font-size:28px;font-weight:700;color:var(--primary);margin:0 0 6px;letter-spacing:1px}.tt-root .shelf-head p{margin:0;color:var(--ink-soft);font-size:13px}.tt-root .shelf-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media (max-width: 460px){.tt-root .shelf-grid{grid-template-columns:1fr}}.tt-root .book-card{position:relative;background:var(--card);border-radius:var(--radius);padding:18px 16px 16px;box-shadow:var(--shadow-card);text-align:left;transition:transform .18s ease,box-shadow .18s ease;overflow:hidden;border:1px solid rgba(107,76,53,.06)}.tt-root .book-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--primary-light),var(--accent))}.tt-root .book-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-float)}.tt-root .book-card:active{transform:translateY(-1px) scale(.99)}.tt-root .book-card .bc-title{font-family:var(--font-read);font-size:21px;font-weight:700;color:var(--ink);margin:0 0 10px;line-height:1.3}.tt-root .book-card .bc-tag{display:inline-block;font-size:11px;color:var(--accent2);background:var(--accent-soft);padding:3px 9px;border-radius:999px;margin-bottom:12px}.tt-root .book-card .bc-meta{display:flex;gap:14px;color:var(--ink-faint);font-size:12px}.tt-root .book-card .bc-meta b{color:var(--primary-light);font-weight:700;font-size:15px}.tt-root .book-card.featured{grid-column:1 / -1;background:linear-gradient(135deg,#fff,var(--accent-soft))}.tt-root .reader{max-width:720px;margin:0 auto;padding-bottom:90px;min-height:100%}.tt-root .topbar{position:sticky;top:0;z-index:20;background:#fdf8f3eb;backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid rgba(107,76,53,.08);padding:calc(env(safe-area-inset-top,0px) + 10px) 16px 10px;display:flex;align-items:center;gap:10px}.tt-root .topbar .back{display:flex;align-items:center;gap:4px;color:var(--primary);font-size:14px;padding:6px 10px 6px 4px;border-radius:10px;transition:background .15s}.tt-root .topbar .back:active{background:var(--accent-soft)}.tt-root .topbar .tb-title{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-family:var(--font-read);font-weight:700;font-size:17px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:calc(100vw - 200px)}.tt-root .part-tabs{position:sticky;top:54px;z-index:15;background:#fdf8f3f2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;gap:8px;overflow-x:auto;padding:12px 16px;scrollbar-width:none}.tt-root .part-tabs::-webkit-scrollbar{display:none}.tt-root .part-tab{flex:0 0 auto;padding:7px 14px;border-radius:999px;font-size:13px;color:var(--ink-soft);background:var(--paper-2);white-space:nowrap;transition:all .18s}.tt-root .part-tab.active{color:#fff;background:linear-gradient(135deg,var(--primary-light),var(--accent2));box-shadow:0 3px 10px #c987544d}.tt-root .section-block{padding:8px 18px 4px;scroll-margin-top:116px}.tt-root .section-head{display:flex;align-items:center;gap:10px;margin:22px 0 14px}.tt-root .section-head .bar{width:4px;height:22px;border-radius:4px;background:linear-gradient(180deg,var(--accent),var(--accent2))}.tt-root .section-head h2{font-family:var(--font-read);font-size:20px;font-weight:700;color:var(--primary);margin:0;line-height:1.3}.tt-root .section-head .sc-count{margin-left:auto;font-size:12px;color:var(--ink-faint)}.tt-root .item-list{display:flex;flex-direction:column;gap:11px}.tt-root .item-card{background:var(--card);border-radius:14px;padding:15px 16px;box-shadow:var(--shadow-card);border:1px solid rgba(107,76,53,.05);position:relative;transition:transform .16s ease,box-shadow .16s ease;animation:fadeUp .4s ease both}.tt-root .item-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-float)}.tt-root .ic-no{position:absolute;top:14px;right:14px;font-size:12px;color:var(--ink-faint);font-variant-numeric:tabular-nums}.tt-root .ic-label{display:inline-block;font-size:11px;color:#fff;background:var(--accent2);padding:2px 9px;border-radius:999px;margin-bottom:8px;font-weight:600}.tt-root .ic-text{font-family:var(--font-read);font-size:var(--read-size, 17px);line-height:var(--read-lh, 1.85);color:var(--ink);margin:0}.tt-root .ic-source{margin-top:9px;font-size:12.5px;color:var(--ink-soft);font-style:italic;padding-left:12px;border-left:2px solid var(--accent-fill)}.tt-root .ic-source:before{content:"— "}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@media (prefers-reduced-motion: reduce){.tt-root .item-card{animation:none}}.tt-root .progress-bar{position:fixed;left:0;right:0;bottom:0;z-index:30;background:#fdf8f3f5;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid rgba(107,76,53,.08);padding:8px 16px calc(env(safe-area-inset-bottom,0px) + 8px)}.tt-root .progress-track{height:5px;border-radius:999px;background:var(--paper-2);overflow:hidden}.tt-root .progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--success));border-radius:999px;transition:width .3s ease}.tt-root .progress-text{text-align:center;font-size:11px;color:var(--ink-faint);margin-top:5px}.tt-root .read-done{position:fixed;left:50%;bottom:64px;transform:translate(-50%);background:var(--success);color:#fff;padding:9px 18px;border-radius:999px;font-size:13px;box-shadow:0 6px 18px #5ba57366;animation:popUp .4s ease both;z-index:40}@keyframes popUp{0%{opacity:0;transform:translate(-50%) translateY(12px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.tt-root .empty-note{text-align:center;color:var(--ink-faint);padding:60px 20px;font-size:14px;line-height:1.8}.tt-root .reader.card-mode{display:flex;flex-direction:column;min-height:calc(100vh - 92px)}.tt-root .card-mode{padding-bottom:92px}.tt-root .flash-area{flex:1;min-height:0;padding:24px 2px 14px;display:flex;justify-content:center;align-items:stretch}.tt-root .flash-card{position:relative;width:100%;max-width:680px;background:var(--card);border-radius:20px;padding:28px 10px 26px;box-shadow:var(--shadow-float);border:1px solid rgba(107,76,53,.06);display:flex;flex-direction:column;overflow:hidden;animation:cardIn .34s ease both}@keyframes cardIn{0%{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}@media (prefers-reduced-motion: reduce){.tt-root .flash-card{animation:none}}.tt-root .flash-card .ic-no{top:30px;right:28px}.tt-root .flash-card .ic-text{font-family:var(--font-read);font-size:19px;line-height:1.9;color:var(--ink);margin:0;flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch}.tt-root .flash-card .ic-source{margin-top:16px;flex-shrink:0}.tt-root .flash-card .fc-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px;flex-shrink:0}.tt-root .fc-tags{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:0}.tt-root .fc-part{font-size:11px;color:#fff;background:linear-gradient(135deg,var(--primary-light),var(--accent2));padding:3px 11px;border-radius:999px;font-weight:600}.tt-root .fc-sec{font-size:12px;color:var(--ink-soft);background:var(--paper-2);padding:3px 11px;border-radius:999px}.tt-root .fc-note{font-family:var(--font-read);font-size:19px;line-height:1.9;color:var(--ink);margin:0;flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch}.tt-root .flash-nav{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;align-items:center;gap:14px;padding:12px 18px calc(env(safe-area-inset-bottom,0px) + 12px);background:#fdf8f3f5;backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px);border-top:1px solid rgba(107,76,53,.08)}.tt-root .fn-btn{padding:11px 20px;border-radius:12px;font-size:14px;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--primary-light),var(--accent2));box-shadow:0 4px 12px #c987544d;transition:transform .12s,opacity .12s;white-space:nowrap}.tt-root .fn-btn:active{transform:scale(.96)}.tt-root .fn-btn:disabled{background:var(--paper-2);color:var(--ink-faint);box-shadow:none;cursor:default}.tt-root .fn-progress{flex:1;text-align:center}.tt-root .fn-track{height:5px;border-radius:999px;background:var(--paper-2);overflow:hidden}.tt-root .fn-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--success));border-radius:999px;transition:width .3s ease}.tt-root .fn-text{font-size:11px;color:var(--ink-faint);margin-top:5px}.tt-root .fish-float{bottom:calc(80px + env(safe-area-inset-bottom,0px))!important}@media (min-width: 600px){.tt-root .shelf{max-width:1080px}.tt-root .shelf-grid{grid-template-columns:repeat(3,1fr);gap:16px}.tt-root .reader{max-width:880px}.tt-root .flash-card{max-width:780px}}@media (min-width: 1024px){.tt-root .shelf{max-width:1240px;padding:0 24px 64px}.tt-root .shelf-grid{grid-template-columns:repeat(3,1fr);gap:20px}.tt-root .shelf-bar{margin-bottom:16px}.tt-root .shelf-head{margin-bottom:22px;padding:12px 0 8px}.tt-root .shelf-head h1{font-size:34px}.tt-root .shelf-head p{font-size:14px}.tt-root .book-card .bc-title{font-size:22px}.tt-root .book-card .bc-meta{font-size:13px}.tt-root .reader{max-width:1060px}.tt-root .flash-card{max-width:940px;padding:40px 40px 38px}.tt-root .flash-card .ic-text,.tt-root .flash-card .fc-note{font-size:21px;line-height:2}.tt-root .flash-card .fc-part{font-size:12px}.tt-root .flash-card .fc-sec{font-size:13px}}@media (min-width: 1440px){.tt-root .shelf{max-width:1380px}.tt-root .reader{max-width:1180px}.tt-root .flash-card{max-width:1060px}}.tt-root .shelf-fav-btn{display:flex;align-items:center;gap:8px;width:100%;margin:0 0 20px;padding:14px 18px;background:linear-gradient(135deg,#fff,var(--accent-soft));border:1px solid rgba(201,135,84,.18);border-radius:14px;font-size:15px;font-weight:600;color:var(--primary);box-shadow:var(--shadow-card);transition:transform .15s,box-shadow .15s}.tt-root .shelf-fav-btn:active{transform:scale(.99)}.tt-root .shelf-fav-btn .sf-icon{color:#e8a14a;font-size:18px}.tt-root .shelf-fav-btn .sf-badge{margin-left:auto;min-width:22px;height:22px;padding:0 7px;display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;border-radius:999px;font-size:12px;font-weight:700}.tt-root .flash-card{position:relative}.tt-root .flash-card .fav-btn{position:relative;flex:0 0 auto;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#b6a085;background:#ffffffbf;border:1px solid rgba(107,76,53,.1);box-shadow:0 1px 4px #785a3c0f;cursor:pointer;transition:transform .15s,color .2s,background .2s,box-shadow .2s;-webkit-tap-highlight-color:transparent}.tt-root .flash-card .fav-btn:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:50%;background:radial-gradient(circle at 50% 0%,rgba(255,255,255,.85),transparent 60%);pointer-events:none}.tt-root .flash-card .fav-btn svg{width:16px;height:16px;transition:transform .25s cubic-bezier(.4,1.6,.6,1)}.tt-root .flash-card .fav-btn:hover{transform:translateY(-1px);box-shadow:0 3px 8px #785a3c1a}.tt-root .flash-card .fav-btn:active{transform:scale(.92)}.tt-root .flash-card .fav-btn.on{color:#f0a93c;background:linear-gradient(135deg,#fff7e6,#ffe8b8);border-color:#f0a93c73;box-shadow:0 3px 10px #f0a93c40}.tt-root .flash-card .fav-btn.on svg{transform:scale(1.12) rotate(8deg)}.tt-root .flash-card .fav-btn.pop svg{animation:favPop .42s cubic-bezier(.4,1.6,.6,1)}@keyframes favPop{0%{transform:scale(.85) rotate(-12deg)}60%{transform:scale(1.28) rotate(14deg)}to{transform:scale(1.12) rotate(8deg)}}.tt-root .fav-list{display:flex;flex-direction:column;gap:12px}.tt-root .fav-item{background:var(--card);border:1px solid rgba(107,76,53,.06);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow-card)}.tt-root .fav-meta{font-size:12px;color:var(--accent2);font-weight:600;margin-bottom:8px}.tt-root .fav-text{font-family:var(--font-read);font-size:17px;line-height:1.8;color:var(--ink);margin:0 0 12px}.tt-root .fav-actions{display:flex;gap:10px;justify-content:flex-end}.tt-root .fav-jump{font-size:13px;color:var(--primary);background:var(--accent-soft);padding:7px 14px;border-radius:10px;font-weight:600}.tt-root .fav-del{font-size:13px;color:var(--ink-soft);background:var(--paper-2);padding:7px 14px;border-radius:10px}