:root{--bg: #090911;--surface: #12141d;--surface-2: #171a26;--ink: #eff3fa;--ink-2: #a8b1c4;--ink-3: #6d7690;--line: rgba(148, 163, 196, .16);--brand: #3ea6f5;--brand-dark: #6cc0ff;--brand-soft: rgba(62, 166, 245, .13);--accent: #34d399;--warn-bg: rgba(251, 191, 36, .08);--warn-line: rgba(251, 191, 36, .32);--radius: 12px;--shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px -12px rgba(0, 0, 0, .55)}:root{--header-bg: rgba(9, 9, 17, .82);--input-bg: #0d1019;--code-bg: #1e1e1e}[data-theme=light]{--bg: #f6f7fb;--surface: #ffffff;--surface-2: #eef1f7;--ink: #131823;--ink-2: #4c566b;--ink-3: #7d8798;--line: rgba(19, 24, 35, .12);--brand: #2b8fe0;--brand-dark: #1b74bd;--brand-soft: rgba(43, 143, 224, .12);--accent: #0f9d76;--warn-bg: rgba(217, 119, 6, .08);--warn-line: rgba(217, 119, 6, .3);--shadow: 0 1px 2px rgba(19, 24, 35, .06), 0 8px 24px -14px rgba(19, 24, 35, .25);--header-bg: rgba(255, 255, 255, .88);--input-bg: #ffffff;color-scheme:light}[data-theme=light] body{background:var(--bg);color:var(--ink)}[data-theme=light] .hero{background:radial-gradient(1100px 480px at 50% -12%,rgba(43,143,224,.14),transparent 62%),linear-gradient(180deg,rgba(43,143,224,.06) 0%,var(--bg) 100%)}[data-theme=light] .lecture-body{background:var(--surface);color:var(--ink)}[data-theme=light] .lecture-body p,[data-theme=light] .lecture-body div,[data-theme=light] .lecture-body span,[data-theme=light] .lecture-body section,[data-theme=light] .lecture-body h1,[data-theme=light] .lecture-body h2,[data-theme=light] .lecture-body h3,[data-theme=light] .lecture-body h4,[data-theme=light] .lecture-body li,[data-theme=light] .lecture-body strong,[data-theme=light] .lecture-body em,[data-theme=light] .lecture-body a{color:var(--ink)!important}[data-theme=light] .lecture-body h1,[data-theme=light] .lecture-body h2,[data-theme=light] .lecture-body h3{color:#1b4f7a!important}[data-theme=light] .lecture-body pre,[data-theme=light] .lecture-body pre *{color:#d4d4d4!important}[data-theme=light] .lecture-body code{color:#c7254e!important;background:#c7254e0f}[data-theme=light] .lecture-body pre code{color:#d4d4d4!important;background:transparent}*{box-sizing:border-box}html{scroll-behavior:smooth;color-scheme:dark}[data-theme=light]{color-scheme:light}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.container{max-width:1080px;margin:0 auto;padding:0 20px}input,textarea,select{background:var(--input-bg);border:1px solid var(--line);color:var(--ink);border-radius:10px}input::placeholder,textarea::placeholder{color:var(--ink-3)}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px #3ea6f526}.site-header{position:sticky;top:0;z-index:50;background:var(--header-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.theme-toggle{width:34px;height:34px;flex-shrink:0;border-radius:10px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;background:var(--surface-2);border:1px solid var(--line);color:var(--ink-2);font-size:15px;line-height:1;transition:color .15s,border-color .15s,transform .15s}.theme-toggle:hover{color:var(--brand);border-color:var(--brand);transform:rotate(-8deg)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;color:var(--ink);letter-spacing:-.2px}.logo img{width:32px;height:32px;display:block}.logo:hover{color:var(--brand-dark)}.main-nav{display:flex;gap:4px;overflow-x:auto;flex-shrink:0}.main-nav>a{padding:8px 10px;border-radius:8px;font-size:14.5px;color:var(--ink-2);white-space:nowrap;flex-shrink:0}.main-nav>a:hover{background:var(--brand-soft);color:var(--brand-dark)}@media(max-width:720px){.main-nav>a{padding:7px 6px;font-size:13px}.main-nav{gap:0;scrollbar-width:none;flex-shrink:1;min-width:0;-webkit-overflow-scrolling:touch}.main-nav::-webkit-scrollbar{display:none}.header-inner{gap:8px}.logo span{display:none}}@media(max-width:480px){.main-nav>a[href="/member"]{display:none}.header-inner{padding-left:12px;padding-right:12px}.main-nav>a{padding:6px 5px;font-size:12.5px}}.nav-link{padding:8px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-2);white-space:nowrap}.nav-link:hover{background:var(--brand-soft);color:var(--brand-dark)}.nav-link.active{background:var(--brand-soft);color:var(--brand-dark);font-weight:600}.hero{padding:72px 0 56px;text-align:center}.hero-badge{display:inline-block;padding:6px 14px;border-radius:999px;font-size:13px;background:var(--brand-soft);color:var(--brand-dark);margin-bottom:20px;font-weight:500}.hero h1{font-size:clamp(28px,4.4vw,42px);line-height:1.25;margin:0 0 14px;letter-spacing:-.5px}.hero h1 em{font-style:normal;color:var(--brand)}.hero p.sub{font-size:16.5px;color:var(--ink-2);max-width:640px;margin:0 auto 26px}.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .15s ease}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark)}.btn-sm{padding:8px 16px;font-size:14px}.section{padding:56px 0}.section-head{margin-bottom:28px}.section-head h2{font-size:26px;margin:0 0 8px;letter-spacing:-.3px}.section-head p{color:var(--ink-2);margin:0}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:all .15s ease;display:flex;flex-direction:column;gap:8px}a.card:hover,.card.hoverable:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#94a3c459}.card .emoji{font-size:26px;line-height:1}.card h3{margin:0;font-size:16.5px;line-height:1.45}.card p{margin:0;color:var(--ink-2);font-size:14px;flex:1}.card .meta{font-size:12.5px;color:var(--ink-3);display:flex;gap:8px;align-items:center}.tag{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:500;background:var(--brand-soft);color:var(--brand-dark)}.tag-free{background:#34d3991f;color:var(--accent)}.tag-vip{background:#fbbf241f;color:#fbbf24}.subscribe-box{background:linear-gradient(135deg,#1d2b53,#2f6bff);border-radius:16px;padding:40px 32px;color:#fff;text-align:center}.subscribe-box h2{margin:0 0 8px;font-size:24px}.subscribe-box p{margin:0 0 24px;opacity:.85;font-size:15px}.subscribe-form{display:flex;gap:10px;max-width:460px;margin:0 auto}.subscribe-form input{flex:1;padding:12px 16px;border-radius:10px;border:none;font-size:15px}.subscribe-box .btn-primary{background:#fff;color:#0b5cad}.subscribe-msg{margin-top:14px;font-size:14px;min-height:20px}.page-head{padding:48px 0 8px}.page-head h1{font-size:30px;margin:0 0 8px;letter-spacing:-.4px}.page-head p{color:var(--ink-2);margin:0;max-width:720px}.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0}.chip{padding:7px 16px;border-radius:999px;font-size:13.5px;cursor:pointer;background:var(--surface);border:1px solid var(--line);color:var(--ink-2)}.chip:hover{border-color:var(--brand);color:var(--brand-dark)}.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}.article-list{display:flex;flex-direction:column;gap:14px;padding-bottom:56px}.article-row{display:flex;gap:18px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.article-row:hover{box-shadow:var(--shadow)}.article-row .emoji{font-size:30px;line-height:1.2;flex-shrink:0}.article-row h3{margin:4px 0 6px;font-size:17px}.article-row p{margin:0;color:var(--ink-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.md-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:36px 40px;margin-bottom:56px}.md-body h2{font-size:21px;margin:36px 0 14px;padding-top:8px;border-top:1px solid var(--line)}.md-body h2:first-child{margin-top:0;border-top:none}.md-body p{margin:12px 0;font-size:15.5px;color:var(--ink-2)}.md-body strong{color:var(--ink)}.md-body ul,.md-body ol{padding-left:22px;margin:12px 0}.md-body li{margin:6px 0;font-size:15.5px}.md-body blockquote{margin:16px 0;padding:14px 18px;border-left:3px solid var(--brand);background:var(--brand-soft);border-radius:0 8px 8px 0;color:var(--ink-2);font-size:15px}.md-body code{background:#94a3c424;padding:2px 6px;border-radius:5px;font-size:13.5px;font-family:SF Mono,Consolas,monospace;color:#f472b6}.md-body pre{background:#1e1e1e;padding:16px;border-radius:8px;overflow-x:auto}.md-body pre code{background:none;color:#d4d4d4;padding:0}.md-body table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14.5px}.md-body th,.md-body td{border:1px solid var(--line);padding:9px 12px;text-align:left}.md-body th{background:#94a3c41a;font-weight:600}.steps{display:flex;flex-direction:column;gap:16px;margin-bottom:56px}.step-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.step-head{display:flex;align-items:center;gap:12px;padding:18px 22px;cursor:pointer;-webkit-user-select:none;user-select:none}.step-no{width:30px;height:30px;border-radius:50%;background:var(--brand-soft);color:var(--brand-dark);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.step-head h3{margin:0;font-size:16.5px;flex:1}.step-body{padding:0 22px 20px 64px;white-space:pre-wrap;color:var(--ink-2);font-size:15px;line-height:1.9}.copy-btn{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:6px 14px;font-size:13px;cursor:pointer;color:var(--ink-2);flex-shrink:0}.copy-btn:hover{border-color:var(--brand);color:var(--brand-dark)}.copy-btn.copied{background:#34d3991f;border-color:#34d39966;color:var(--accent)}.lock-banner{display:flex;gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:var(--radius);padding:20px 24px;margin-bottom:24px}.lock-banner strong{color:#fcd34d}.tool-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.tool-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:56px}.tool-panel label{font-weight:600;font-size:14.5px;display:block;margin-bottom:8px}.tool-panel textarea{width:100%;min-height:140px;padding:14px;border-radius:10px;border:1px solid var(--line);font-size:15px;font-family:inherit;resize:vertical;outline:none;line-height:1.7}.tool-panel textarea:focus{border-color:var(--brand)}.tone-row{display:flex;gap:8px;margin:14px 0 20px;align-items:center;flex-wrap:wrap}.tone-row span{font-size:13.5px;color:var(--ink-3)}.tool-output{margin-top:20px;padding:20px;border-radius:10px;background:#0d1019;border:1px solid var(--line);white-space:pre-wrap;font-size:15px;line-height:1.9;color:var(--ink-2)}.tool-output.demo{background:var(--warn-bg);border-color:var(--warn-line)}.job-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;padding-bottom:56px}.site-footer{background:#0b0e17;color:#aab4c8;margin-top:40px;border-top:1px solid var(--line)}.footer-inner{display:flex;justify-content:space-between;gap:32px;padding:40px 20px 24px;flex-wrap:wrap}.footer-inner p{font-size:13.5px;margin:8px 0 0;max-width:460px}.footer-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap;padding-top:6px}.footer-links a{font-size:14px;color:#aab4c8}.footer-links a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:16px 20px;font-size:12.5px;color:#7c8698}.empty{text-align:center;color:var(--ink-3);padding:64px 0;font-size:15px}.loading{text-align:center;color:var(--ink-3);padding:48px 0}.error-box{background:#ef44441a;border:1px solid rgba(239,68,68,.35);color:#fca5a5;padding:16px 20px;border-radius:10px;margin-bottom:24px;font-size:14.5px}.breadcrumb{font-size:13.5px;color:var(--ink-3);margin-bottom:14px;display:flex;gap:6px;align-items:center}.breadcrumb a:hover{color:var(--brand-dark)}.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;transition:box-shadow .15s,transform .15s}a.tool-card:hover{box-shadow:0 8px 24px #00000059;transform:translateY(-2px)}.tool-section{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin-bottom:16px}.tool-section h2{font-size:17px;margin:0 0 10px;letter-spacing:-.2px}.tool-section p{margin:0;color:var(--ink-2);line-height:1.85}.tool-section.warn{background:#fbbf2412;border-color:#fbbf2447}.tool-section.start{background:#34d39912;border-color:#34d39947}.check-list{margin:0;padding-left:2px;list-style:none}.check-list li{position:relative;padding-left:22px;margin-bottom:8px;color:var(--ink-2);line-height:1.75;font-size:14.5px}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.tool-section.warn .check-list li:before{content:"!";color:#fbbf24;background:#fbbf242e;border-radius:50%;width:16px;height:16px;display:flex;align-items:center;justify-content:center;font-size:12px;top:2px}.hero{padding:58px 0 44px;text-align:center;position:relative;overflow:visible;z-index:20;background:radial-gradient(1100px 480px at 50% -12%,rgba(62,166,245,.17),transparent 62%),linear-gradient(180deg,rgba(62,166,245,.05) 0%,var(--bg) 100%)}.hero h1 em{font-style:normal;background:linear-gradient(92deg,#6cc0ff 10%,#a78bfa 90%);-webkit-background-clip:text;background-clip:text;color:transparent}.rank-section{padding:12px 0 8px}.rank-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}.rank-head{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:24px 28px 18px;border-bottom:1px solid var(--line);background:linear-gradient(135deg,#ffffff09,#ffffff03)}.rank-head h2{margin:0 0 6px;font-size:20px;letter-spacing:-.3px}.rank-head p{margin:0;color:var(--ink-2);font-size:14px;line-height:1.7}.rank-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.chip-static,.chip-stat{cursor:default}.chip-stat{background:#34d3991f;color:var(--accent);font-weight:600}.rank-list{list-style:none;margin:0;padding:8px 12px}.rank-row{display:flex;align-items:center;gap:14px;padding:13px 14px;border-radius:12px;text-decoration:none;color:var(--ink);transition:background .15s ease,transform .15s ease}.rank-row:hover{background:#3ea6f514;transform:translate(3px)}.rank-no{width:32px;height:32px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:14.5px;font-weight:700;color:var(--ink-3);background:#94a3c41a}.rank-row.rank-1 .rank-no{background:linear-gradient(135deg,#fbbf24,#d97706);color:#fff;box-shadow:0 2px 8px #d9770659}.rank-row.rank-2 .rank-no{background:linear-gradient(135deg,#cbd5e1,#94a3b8);color:#fff}.rank-row.rank-3 .rank-no{background:linear-gradient(135deg,#d6a06a,#b4762f);color:#fff}.hot-badge{flex-shrink:0;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:#f43f5e1f;color:#fb7185;border:1px solid rgba(244,63,94,.3)}.rank-title{flex:1;font-size:15px;line-height:1.5;min-width:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.rank-row:hover .rank-title{color:var(--brand-dark)}.rank-views{flex-shrink:0;font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums;white-space:nowrap}.bid-leader-card{border:1px solid rgba(251,191,36,.4);border-radius:12px;padding:16px;margin-bottom:16px;background:linear-gradient(135deg,#fbbf2417,#fbbf2408);box-shadow:0 4px 18px #d9770626}.rank-page-head{padding:56px 0 6px;text-align:center}.rank-page-head h1{font-size:clamp(28px,4vw,40px);line-height:1.2;margin:0 0 14px;letter-spacing:-.6px}.rank-page-head p{color:var(--ink-2);max-width:700px;margin:0 auto;font-size:15.5px;line-height:1.8}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:30px 0 4px}.stat-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px 14px;text-align:center}.stat-item b{display:block;font-size:22px;letter-spacing:-.5px;color:var(--brand-dark);font-variant-numeric:tabular-nums;margin-bottom:2px}.stat-item span{font-size:12.5px;color:var(--ink-3)}.rank-tabs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:26px 0 0}.rank-source{flex-shrink:0;font-size:11.5px;color:var(--ink-3);border:1px solid var(--line);border-radius:999px;padding:2px 8px;white-space:nowrap}.rank-footnote{font-size:12.5px;color:var(--ink-3);margin:14px 0 56px;line-height:1.8}.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:8px 0 6px}.entry-card{display:flex;flex-direction:column;gap:7px;padding:20px 22px;border:1px solid var(--line);border-radius:16px;text-decoration:none;color:var(--ink);background:#94a3c40a;transition:border-color .18s ease,transform .18s ease,background .18s ease}.entry-card:hover{border-color:var(--brand);transform:translateY(-2px);background:#3ea6f512}.entry-icon{font-size:22px;line-height:1}.entry-title{font-size:17px;font-weight:700}.entry-desc{font-size:13.5px;color:var(--ink-2);line-height:1.7}.entry-meta{margin-top:4px;font-size:13px;color:var(--brand);font-variant-numeric:tabular-nums}@media(max-width:720px){.entry-grid{grid-template-columns:1fr}}.member-chip{display:inline-flex;align-items:center;gap:6px;flex-shrink:0;padding:5px 11px;border-radius:999px;font-size:12.5px;text-decoration:none;background:#eab30824;color:#b45309;border:1px solid rgba(234,179,8,.35);font-variant-numeric:tabular-nums;white-space:nowrap}.member-chip:hover{background:#eab30838}.member-chip-dot{width:6px;height:6px;border-radius:50%;background:#d97706}@media(max-width:720px){.member-chip{padding:4px 8px;font-size:11.5px;gap:4px}}.share-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:14px 0 4px}.share-label{font-size:12.5px;color:var(--ink-3)}.share-btn{display:inline-flex;align-items:center;gap:4px;cursor:pointer;padding:5px 11px;border-radius:999px;font-size:12.5px;line-height:1;background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line);text-decoration:none;transition:border-color .15s,color .15s,background .15s}.share-btn:hover{border-color:#3ea6f58c;color:var(--brand-dark);background:var(--brand-soft)}.share-hint{font-size:12.5px;color:#fbbf24;background:var(--warn-bg);border:1px solid var(--warn-line);padding:4px 9px;border-radius:6px}@media(max-width:720px){.share-bar{gap:6px;margin:10px 0 2px}.share-btn{padding:5px 9px;font-size:12px}}.footer-visits{font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}.rev-note{margin:18px 0 10px;padding:10px 14px;border-radius:10px;font-size:13.5px;background:var(--brand-soft);border:1px solid rgba(62,166,245,.28);color:var(--ink-2)}.rev-list{list-style:none;margin:14px 0 0;padding:0}.rev-row{display:flex;align-items:flex-start;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.rev-no{flex-shrink:0;width:26px;text-align:center;font-variant-numeric:tabular-nums;color:var(--ink-3);font-weight:700;font-size:14px;padding-top:1px}.rev-main{flex:1;min-width:0}.rev-title{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.rev-title a{font-weight:650;color:var(--ink);font-size:15.5px}.rev-title a:hover{color:var(--brand-dark)}.rev-cat{font-size:11.5px;padding:2px 8px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);color:var(--ink-3)}.rev-note-line{font-size:13px;color:var(--ink-2);margin-top:4px}.rev-src{font-size:12px;color:var(--ink-3);margin-top:4px}.rev-src a{color:var(--brand)}.rev-money{flex-shrink:0;min-width:104px;text-align:right;display:flex;flex-direction:column;gap:3px;font-variant-numeric:tabular-nums;white-space:nowrap}.rev-money>*:first-child{font-size:15px;font-weight:700;color:var(--accent)}.rev-locked{color:var(--ink-3)!important;font-weight:500!important;font-size:12.5px!important;white-space:nowrap}.rev-raw{font-size:11.5px;color:var(--ink-3);max-width:200px}.rev-empty{margin:24px 0;padding:26px 20px;text-align:center;border-radius:12px;background:var(--surface);border:1px dashed var(--line)}.rev-empty strong{display:block;font-size:16px;margin-bottom:6px}.rev-empty p{margin:0;color:var(--ink-3);font-size:13.5px}.rev-foot{margin:26px 0 10px;font-size:12.5px;color:var(--ink-3);line-height:1.7}@media(max-width:640px){.rev-row{gap:10px}.rev-money{min-width:92px}.rev-money>*:first-child{font-size:13.5px}.rev-raw{display:none}}.play-page{max-width:720px}.play-head{margin:24px 0 18px}.play-head h1{margin:0 0 8px;font-size:26px}.play-head p{margin:0;color:var(--ink-2);font-size:14px;line-height:1.8}.play-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 22px 20px}.play-progress{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-3);margin-bottom:16px}.play-name{font-size:21px;font-weight:700;color:var(--ink);word-break:break-all}.play-meta{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 4px}.play-chip{font-size:11.5px;color:var(--ink-3);border:1px solid var(--line);border-radius:999px;padding:2px 9px}.play-ask{margin:16px 0 12px;font-size:14.5px;color:var(--ink-2)}.play-buckets{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.play-bucket{padding:14px 12px;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);font-size:14.5px;cursor:pointer;transition:all .15s}.play-bucket:hover:not(:disabled){border-color:#3ea6f580;color:var(--brand)}.play-bucket.right{border-color:#22c55e;background:#22c55e1f;color:#4ade80;font-weight:700}.play-bucket.wrong{border-color:#ef4444;background:#ef44441a;color:#f87171}.play-bucket:disabled{cursor:default}.play-feedback{margin-top:16px;padding:14px 16px;border-radius:12px;display:flex;flex-direction:column;gap:4px;animation:dropIn .18s ease-out}.play-feedback.ok{background:#22c55e1a;border:1px solid rgba(34,197,94,.3)}.play-feedback.bad{background:#ef444414;border:1px solid rgba(239,68,68,.28)}.play-feedback b{font-size:14.5px}.play-feedback span{font-size:13px;color:var(--ink-2)}.play-actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}.play-done{text-align:center}.play-score{font-size:54px;font-weight:800;line-height:1;color:var(--brand)}.play-score span{font-size:20px;color:var(--ink-3);margin-left:6px}.play-score-sub{margin:12px 0 18px;color:var(--ink-2);font-size:14px}.play-done .play-actions{justify-content:center}.play-teaser{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:26px auto 0;padding:20px 22px;border-radius:16px;background:linear-gradient(120deg,#3ea6f51a,#8b5cf61a);border:1px solid var(--line)}.play-teaser h2{margin:4px 0 6px;font-size:18px}.play-teaser p{margin:0;font-size:13.5px;color:var(--ink-2);line-height:1.7}.play-teaser-kicker{font-size:11.5px;letter-spacing:.08em;color:var(--brand)}@media(max-width:720px){.play-buckets{grid-template-columns:1fr}.play-teaser{flex-direction:column;align-items:flex-start}}.hero-search-row{display:flex;gap:10px;margin:26px auto 0;align-items:flex-start}.play-btn{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;gap:8px;height:56px;padding:0 20px;border-radius:14px;text-decoration:none;font-size:14.5px;font-weight:600;color:var(--ink);background:linear-gradient(120deg,#3ea6f529,#8b5cf62e);border:1px solid rgba(62,166,245,.32);transition:border-color .18s,transform .18s,background .18s}.play-btn:hover{border-color:#3ea6f5b3;transform:translateY(-1px);background:linear-gradient(120deg,#3ea6f53d,#8b5cf642)}@media(max-width:720px){.play-btn{height:50px;padding:0 14px;border-radius:12px}.play-btn-text{display:none}}.update-toast{position:fixed;left:50%;bottom:22px;transform:translate(-50%);z-index:200;padding:11px 20px;border-radius:999px;font-size:13.5px;cursor:pointer;background:var(--brand);color:#fff;border:0;box-shadow:0 12px 32px #00000073;animation:toastIn .25s ease-out}.update-toast:hover{background:var(--brand-dark)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%)}}.search-wrap{position:relative;flex:1;min-width:0;max-width:none;margin:0}.search-box{display:flex;align-items:center;gap:10px;height:56px;padding:0 10px 0 16px;background:var(--surface);border:1px solid var(--line);border-radius:14px;transition:border-color .18s,box-shadow .18s,background .18s}.search-box:focus-within,.search-box.is-open{border-color:#3ea6f58c;box-shadow:0 0 0 4px #3ea6f51f,0 10px 30px #00000047;background:var(--surface-2)}.search-icon{width:19px;height:19px;flex-shrink:0;color:var(--ink-3)}.search-box input{flex:1;min-width:0;height:100%;border:0;outline:0;background:transparent;color:var(--ink);font-size:16.5px}.search-box input::placeholder{color:var(--ink-3)}.search-kbd{font-size:12px;color:var(--ink-3);border:1px solid var(--line);border-radius:6px;padding:2px 7px}.search-clear{background:transparent;border:0;color:var(--ink-3);font-size:20px;line-height:1;cursor:pointer;padding:2px 6px;border-radius:6px}.search-clear:hover{color:var(--ink);background:#ffffff0f}.search-spin{width:16px;height:16px;border-radius:50%;flex-shrink:0;border:2px solid rgba(62,166,245,.25);border-top-color:var(--brand);animation:sspin .7s linear infinite}@keyframes sspin{to{transform:rotate(360deg)}}.search-hots{display:flex;gap:8px;justify-content:flex-start;margin-top:12px;flex-wrap:wrap}.search-hot{background:transparent;border:1px solid var(--line);color:var(--ink-2);font-size:12.5px;padding:4px 11px;border-radius:999px;cursor:pointer;transition:color .15s,border-color .15s,background .15s}.search-hot:hover{color:var(--brand);border-color:#3ea6f580;background:var(--brand-soft)}.search-panel{position:absolute;left:0;right:0;top:calc(100% + 8px);z-index:60;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 24px 60px #00000080;padding:8px;max-height:min(60vh,460px);overflow:auto;animation:dropIn .16s ease-out}@keyframes dropIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}.search-progress{position:absolute;left:8px;right:8px;top:3px;height:2px;border-radius:2px;background:linear-gradient(90deg,transparent,var(--brand),transparent);animation:sweep 1s linear infinite}@keyframes sweep{0%{transform:translate(-40%)}to{transform:translate(40%)}}.search-group{margin-bottom:4px}.search-group-label{font-size:11.5px;letter-spacing:.06em;color:var(--ink-3);padding:6px 10px 4px}.search-row{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:9px;text-decoration:none;color:var(--ink)}.search-row.is-active{background:var(--brand-soft)}.search-row-title{flex:1;min-width:0;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.search-tag{flex-shrink:0;font-size:11px;color:var(--ink-3);border:1px solid var(--line);border-radius:5px;padding:1px 6px}.search-tag-quiet{border-color:transparent;background:#ffffff0d}.search-foot{display:flex;justify-content:space-between;font-size:11.5px;color:var(--ink-3);padding:8px 10px 4px;border-top:1px solid var(--line);margin-top:6px}.search-empty{padding:18px 12px;font-size:14px;color:var(--ink-2);display:flex;flex-direction:column;gap:4px}.search-empty span{font-size:12.5px;color:var(--ink-3)}@media(max-width:720px){.search-box{height:50px;border-radius:12px}.search-box input{font-size:15.5px}.search-kbd{display:none}.search-wrap{margin-top:0}}.curated{margin:20px 0 4px}.curated-head{display:flex;align-items:baseline;gap:10px;margin-bottom:10px}.curated-head h2{margin:0;font-size:15px;color:var(--ink)}.curated-head span{font-size:12.5px;color:var(--ink-3)}.curated-row{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.curated-card{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--surface);border:1px solid var(--line);border-radius:12px;min-width:0}.curated-icon{width:36px;height:36px;border-radius:9px;flex-shrink:0;border:1px solid rgba(255,255,255,.1)}.curated-main{min-width:0;display:flex;flex-direction:column;gap:2px}.curated-name{font-size:13.5px;color:var(--ink);text-decoration:none;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.curated-name:hover{color:var(--brand)}.curated-meta{font-size:11.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.curated-repo{margin-left:auto;color:var(--ink-3);text-decoration:none;font-size:13px}.curated-repo:hover{color:var(--brand)}@media(max-width:1100px){.curated-row{grid-template-columns:repeat(3,minmax(0,1fr))}.curated-lang{display:none}}@media(max-width:760px){.curated-row{display:flex;overflow-x:auto;gap:8px;scrollbar-width:none;-webkit-overflow-scrolling:touch}.curated-row::-webkit-scrollbar{display:none}.curated-card{flex:0 0 210px}}.series-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:22px 0 40px}.series-card{display:flex;flex-direction:column;gap:8px;padding:20px 20px 18px;background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--brand);border-radius:14px;text-decoration:none;transition:transform .15s,border-color .15s}.series-card:hover{transform:translateY(-2px);border-color:#3ea6f573}.series-card-top{display:flex;align-items:center;justify-content:space-between}.series-emoji{font-size:26px;line-height:1}.series-icon{width:42px;height:42px;border-radius:11px;display:block;border:1px solid rgba(255,255,255,.1)}.series-icon-lg{width:56px;height:56px;border-radius:14px;flex-shrink:0;border:1px solid rgba(255,255,255,.1)}.series-count{font-size:12px;color:var(--ink-3);background:var(--surface-2);border:1px solid var(--line);padding:3px 9px;border-radius:999px}.series-card h2{margin:0;font-size:17px;color:var(--ink)}.series-tagline{margin:0;font-size:13.5px;color:var(--ink-2);line-height:1.7}.series-latest{margin:2px 0 0;font-size:12.5px;color:var(--ink-3);line-height:1.6;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.series-latest span{color:var(--brand);margin-right:4px}.series-enter{margin-top:auto;padding-top:8px;font-size:13px;color:var(--brand)}.crumbs{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--ink-3);margin:22px 0 14px;flex-wrap:wrap}.crumbs a{color:var(--ink-2)}.crumbs a:hover{color:var(--brand-dark)}.series-head{display:flex;gap:16px;align-items:flex-start;padding:20px;border-radius:14px;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--brand)}.series-emoji-lg{font-size:34px;line-height:1}.series-head h1{margin:0 0 6px;font-size:22px}.series-meta{margin:8px 0 0;font-size:13px;color:var(--ink-3)}.series-meta a{color:var(--brand)}.toc{margin:20px 0 40px;border-radius:14px;overflow:hidden;border:1px solid var(--line)}.toc-row{display:flex;gap:14px;align-items:flex-start;padding:13px 16px;text-decoration:none;border-bottom:1px solid var(--line);background:var(--surface);transition:background .12s}.toc-row:last-child{border-bottom:0}.toc-row:hover{background:var(--surface-2)}.toc-no{flex-shrink:0;width:26px;font-variant-numeric:tabular-nums;font-weight:700;color:var(--ink-3);font-size:13px}.toc-main{flex:1;min-width:0}.toc-title{display:block;font-size:14.5px;color:var(--ink);line-height:1.55}.toc-digest{display:block;margin-top:3px;font-size:12.5px;color:var(--ink-3);line-height:1.6;overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}.toc-go{color:var(--ink-3);font-size:13px}.lecture-wrap{max-width:800px}.lecture-body{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:14px;padding:26px 24px;font-size:15px;line-height:1.85;margin-bottom:18px;overflow-wrap:break-word}.lecture-body img{max-width:100%;height:auto}.lecture-body a{color:var(--brand)}.lecture-body pre{max-width:100%}.lecture-body table{font-size:13px}.lecture-nav{display:flex;gap:10px;justify-content:space-between;align-items:center;margin:18px 0 0;flex-wrap:wrap}.lecture-cta{margin:26px 0 48px;padding:20px;border-radius:14px;background:var(--surface);border:1px solid var(--line);text-align:center}.lecture-cta-title{margin:0 0 6px;font-size:15px;font-weight:700;color:var(--ink)}.lecture-cta p{margin:0 0 14px;font-size:13.5px;color:var(--ink-2)}@media(max-width:760px){.series-grid{grid-template-columns:1fr}.lecture-body{padding:18px 15px;border-radius:10px;font-size:14.5px}.series-head{padding:16px}}.member-page{padding-top:36px}.member-banner{margin:0 0 18px;padding:12px 16px;border-radius:12px;font-size:14px;background:#3ea6f51f;color:var(--ink)}.member-banner.ok{background:#22c55e21}.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:10px 0 22px;align-items:stretch}.plan-card{position:relative;display:flex;flex-direction:column;gap:10px;border:1px solid var(--line);border-radius:16px;padding:20px 18px;background:#94a3c40a}.plan-card.featured{border-color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand)}.plan-badge{position:absolute;top:-10px;right:14px;background:var(--brand);color:#fff;font-size:11.5px;padding:2px 9px;border-radius:999px}.plan-name{font-size:14.5px;color:var(--ink-2)}.plan-price{display:flex;align-items:baseline;gap:4px;flex-wrap:wrap}.plan-price b{font-size:30px;letter-spacing:-.6px}.plan-price small{color:var(--ink-3);font-size:13px}.plan-save{font-size:12px;color:#16a34a;background:#16a34a1f;padding:2px 8px;border-radius:999px}.plan-perks{list-style:none;margin:4px 0 0;padding:0;display:flex;flex-direction:column;gap:7px;font-size:13.5px;color:var(--ink-2);line-height:1.6}.plan-perks li:before{content:"✓ ";color:var(--brand)}.plan-cta{margin-top:auto;text-align:center;font-size:13.5px;color:var(--ink-3);padding:10px 0}.plan-card .btn{margin-top:auto}.member-faq{border-top:1px solid var(--line);padding-top:20px;font-size:14px;line-height:1.8;color:var(--ink-2)}.member-faq h2{font-size:17px;color:var(--ink);margin:0 0 12px}.member-faq p{margin:0 0 14px}.member-faq b{color:var(--ink)}.member-note{font-size:13px;color:var(--ink-3);margin:0 0 12px}.member-note.err{color:#f87171}.lib-gate{margin:18px 0 8px;padding:22px;border-radius:16px;text-align:center;border:1px dashed var(--line);background:#3ea6f50f}.lib-gate b{display:block;font-size:16px;margin-bottom:6px}.lib-gate p{margin:0 0 14px;font-size:13.5px;color:var(--ink-2)}@media(max-width:720px){.plan-grid{grid-template-columns:1fr}}.lib-row{display:flex;align-items:center;gap:14px;padding:12px 14px;border-radius:12px;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line);transition:background .15s ease}.lib-row:hover{background:#3ea6f514}.lib-row:hover .lib-title{color:var(--brand-dark)}.lib-no{width:30px;flex-shrink:0;font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}.lib-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:5px}.lib-title{font-size:15px;line-height:1.45;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;transition:color .15s ease}.lib-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums}.lib-metric{flex-shrink:0;text-align:right;font-size:13.5px;color:var(--ink-2);font-variant-numeric:tabular-nums;display:flex;flex-direction:column;gap:3px;min-width:78px}.lib-metric small{font-size:11.5px;color:var(--ink-3)}.lib-tags{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}.lib-tags::-webkit-scrollbar{display:none}.lib-tags .chip{flex-shrink:0}.pager{display:flex;align-items:center;justify-content:center;gap:14px;margin:22px 0 0}.pager .chip{cursor:pointer;padding:6px 14px;font-size:13px}.pager .chip:disabled{opacity:.35;cursor:not-allowed}.pager-info{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}@media(max-width:720px){.hero{padding:48px 0 40px}.md-body{padding:24px 20px}.article-row{flex-direction:column;gap:10px}.subscribe-form{flex-direction:column}.logo{font-size:15.5px;gap:7px}.logo img{width:26px;height:26px}.stat-grid{grid-template-columns:repeat(2,1fr)}.rank-page-head{padding:36px 0 4px}}
