:root{--primary: #6E5BD8;--primary-deep: #5346C7;--primary-bright: #9080FF;--primary-light: #F0EDFF;--primary-soft: #F8F6FF;--ink: #1A1A2E;--ink-2: #4A4A68;--muted: #8B8BA3;--line: #ECEBF3;--bg: #FAFAFE;--white: #ffffff;--shadow-sm: 0 1px 3px rgba(26, 26, 46, .04);--shadow: 0 4px 20px rgba(26, 26, 46, .06);--shadow-lg: 0 16px 48px rgba(26, 26, 46, .08);--radius: 18px;--radius-lg: 22px}*{box-sizing:border-box}html,body,#root{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:PingFang SC,Microsoft YaHei,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none;transition:opacity .15s}a:hover{opacity:.78}.topbar{position:sticky;top:0;z-index:100;background:#ffffffd1;backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line);height:72px;display:flex;align-items:center}.topbar-inner{max-width:1200px;width:100%;margin:0 auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}.topbar-brand{display:flex;align-items:center;min-width:0}.topbar-logo{height:40px;width:auto;max-width:200px;object-fit:contain;display:block}.topbar-nav{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}.topbar-nav .nav-item{padding:8px 14px;border-radius:8px;font-size:14px;color:var(--ink-2);cursor:pointer;border:none;background:transparent;font-family:inherit;font-weight:500;transition:all .2s}.topbar-nav .nav-item:hover{background:var(--primary-soft);color:var(--primary)}.topbar-nav .nav-item.active{background:var(--primary);color:#fff;font-weight:600;box-shadow:0 4px 14px #6e5bd84d}.topbar-nav .nav-divider{width:1px;height:18px;background:var(--line);margin:0 10px}.topbar-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}.menu-toggle{background:var(--primary-soft);color:var(--primary-deep);border:1px solid var(--primary-light);border-radius:10px;padding:9px 16px;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .18s}.menu-toggle:hover{background:var(--primary);color:#fff}.dropdown-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#1a1a2e40;z-index:90}.dropdown-panel{position:absolute;top:100%;left:0;right:0;max-width:1200px;margin:0 auto;background:#fff;color:var(--ink);max-height:calc(100vh - 72px);overflow-y:auto;padding:18px 32px 26px;box-shadow:0 20px 50px #1a1a2e2e;z-index:95;border-radius:0 0 18px 18px}.dropdown-group{margin-bottom:18px}.dropdown-group:last-child{margin-bottom:0}.dropdown-title{font-size:12px;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:1.2px;margin:4px 0 10px}.dropdown-item{display:block;width:100%;text-align:left;border:1px solid var(--line);background:#fff;color:var(--ink);padding:11px 14px;border-radius:10px;font-size:14.5px;font-family:inherit;margin-bottom:7px;cursor:pointer;transition:all .16s ease}.dropdown-item:hover{background:var(--primary-soft);border-color:var(--primary);color:var(--primary-deep)}.dropdown-item.active{background:var(--primary);color:#fff;font-weight:700;border-color:var(--primary)}.main{max-width:1200px;margin:0 auto;padding:40px 32px;width:100%}.page-title{font-size:36px;font-weight:800;margin:0 0 10px;letter-spacing:-.6px}.page-desc{color:var(--muted);margin:0 0 32px;font-size:16px;line-height:1.7}.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;margin-bottom:20px;box-shadow:var(--shadow);transition:all .25s}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.card h2{font-size:22px;margin:0 0 14px;display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.2px}.card h3{font-size:17px;margin:20px 0 10px;font-weight:700}.card p,.card li{color:#44415f;font-size:15px}.card ul{padding-left:22px}.card strong{color:var(--ink)}.badge{display:inline-block;background:var(--primary-light);color:var(--primary-deep);font-size:12px;font-weight:700;padding:4px 11px;border-radius:999px;letter-spacing:.3px}.arch{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:10px}.arch .node{border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:var(--white);transition:all .22s;position:relative}.arch .node:before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;border-radius:4px 0 0 4px;background:linear-gradient(180deg,var(--primary),var(--primary-bright));opacity:0;transition:opacity .22s}.arch .node:hover{border-color:var(--primary-light);box-shadow:var(--shadow);transform:translateY(-2px)}.arch .node:hover:before{opacity:1}.arch .node b{color:var(--primary-deep);font-size:15px}.arch .node small{color:var(--ink-2);font-size:13.5px;line-height:1.6}.code-block{background:#1a1a2e;border-radius:14px;overflow:hidden;margin:16px 0 20px;border:1px solid #2D2D4A;box-shadow:0 10px 30px #1a1a2e1f}.code-head{display:flex;align-items:center;gap:6px;padding:12px 18px;background:#15132a;border-bottom:1px solid #2D2D4A;font-size:12px;color:#9b9bb5}.code-head .dot{width:11px;height:11px;border-radius:50%;background:#3d3d5c}.code-head .dot.red{background:#ff5f57}.code-head .dot.yellow{background:#febc2e}.code-head .dot.green{background:#28c840}.code-head .lang{margin-left:auto;font-family:SF Mono,Fira Code,monospace;font-size:11px;color:#6b6b8e;letter-spacing:.5px}.code-head .copy-btn{background:#2d2d4a;color:#a9a4ff;border:none;padding:5px 12px;border-radius:7px;font-size:11.5px;cursor:pointer;margin-left:12px;font-family:inherit;transition:all .15s}.code-head .copy-btn:hover{background:var(--primary);color:#fff}.code-head .copy-btn.done{background:var(--accent, #FFB547);color:#fff}.code-block pre{margin:0;padding:22px 24px;overflow-x:auto;color:#e8e7f6;font-family:SF Mono,Fira Code,Consolas,monospace;font-size:13.5px;line-height:1.8}.code-block code{white-space:pre}.tok-key{color:#a9a4ff}.tok-str{color:#ffc970}.tok-com{color:#6b6b8e;font-style:italic}.tok-num{color:#ff9f66}.notes-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.note-form textarea,.note-form input{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:14.5px;font-family:inherit;margin-bottom:12px;background:#fff;color:var(--ink);transition:border-color .18s,box-shadow .18s}.note-form textarea:focus,.note-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #6e5bd81f}.note-form textarea{min-height:130px;resize:vertical}.btn-primary{background:var(--ink);color:#fff;border:none;padding:12px 24px;border-radius:12px;font-size:14.5px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .18s}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 20px #1a1a2e2e}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.note-list{display:flex;flex-direction:column;gap:12px;max-height:480px;overflow-y:auto;padding-right:4px}.note-item{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#fff;transition:all .18s}.note-item:hover{box-shadow:var(--shadow);border-color:var(--primary-light)}.note-item .nt{font-weight:700;margin-bottom:6px;display:flex;justify-content:space-between;color:var(--ink);font-size:15px}.note-item .nt small{color:var(--muted);font-weight:400;font-size:12px}.note-item .nc{white-space:pre-wrap;font-size:14.5px;color:#44415f;line-height:1.65}.note-del{background:none;border:none;color:#e05c5c;cursor:pointer;font-size:12px;font-family:inherit}.status{font-size:13px;color:var(--primary);margin-top:8px;min-height:18px}.empty{color:var(--muted);font-size:14px;text-align:center;padding:30px 0}.practice-item{border-left:4px solid var(--primary)}.practice-item .tag{font-size:12px;color:var(--primary-deep);font-weight:700;margin-bottom:4px}.cat-title{font-size:21px;font-weight:800;margin:38px 0 18px;padding:10px 16px;border-radius:10px;background:linear-gradient(90deg,var(--primary-soft),transparent);border-left:4px solid var(--primary);letter-spacing:-.3px;color:var(--ink)}.skill-grid{display:grid;grid-template-columns:1fr;gap:18px}.skill-item{padding:26px 30px;margin:0;border-radius:18px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--primary);page-break-inside:avoid;break-inside:avoid;transition:all .22s;position:relative;overflow:hidden}.skill-item:after{content:"";position:absolute;top:-30px;right:-30px;width:110px;height:110px;background:radial-gradient(circle,rgba(110,91,216,.07),transparent 70%);pointer-events:none}.skill-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}.skill-item h3{margin:0 0 10px;font-size:19px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;font-weight:700;letter-spacing:-.2px}.skill-item .sk-name{font-size:11.5px;color:var(--muted);font-family:SF Mono,Consolas,monospace;font-weight:400}.star-badge{display:inline-block;margin-left:2px;font-size:14px;vertical-align:middle}.skill-item>p{margin:8px 0 0;font-size:14.5px;color:var(--ink-2);line-height:1.7}.skill-item>p .lab{display:inline-block;min-width:46px;font-weight:700;color:var(--primary-deep)}.skill-item .ex{color:#44415f;background:var(--primary-soft);border-radius:10px;padding:12px 14px;font-size:14px;line-height:1.7}.callout{border-left:4px solid var(--primary);background:linear-gradient(135deg,var(--primary-soft) 0%,#fff 100%);border-radius:0 12px 12px 0;padding:14px 18px;margin:16px 0;font-size:14.5px;color:var(--ink-2)}.callout b{color:var(--primary-deep)}.callout.warn{border-left-color:#e0a23b;background:#fff7e8;color:#6b4e16}.callout.warn b{color:#b97c12}.mode-table{width:100%;border-collapse:collapse;margin:14px 0 6px;font-size:14px;background:#fff;border-radius:12px;overflow:hidden;border:1px solid var(--line)}.mode-table th,.mode-table td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}.mode-table tr:last-child td{border-bottom:none}.mode-table th{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}.mode-table td small{color:var(--muted)}.step{list-style:none;padding:0;margin:12px 0 4px;counter-reset:s}.step li{position:relative;padding:10px 0 10px 44px;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--ink-2);line-height:1.7}.step li:last-child{border-bottom:none}.step li:before{counter-increment:s;content:counter(s);position:absolute;left:0;top:10px;width:28px;height:28px;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;border-radius:50%;text-align:center;line-height:28px;font-size:13px;font-weight:700}.case-wrap{display:flex;flex-direction:column;gap:16px;margin-top:8px}.case-card{padding:22px 26px;background:#fff;border:1px solid var(--line);border-radius:16px;border-left:4px solid var(--primary);transition:all .22s;position:relative}.case-card:after{content:"";position:absolute;top:-24px;right:-24px;width:90px;height:90px;background:radial-gradient(circle,rgba(110,91,216,.06),transparent 70%);pointer-events:none}.case-card:hover{box-shadow:var(--shadow);border-color:var(--primary-light)}.case-card-title{font-size:17.5px;margin:0 0 10px;color:var(--ink);font-weight:700;letter-spacing:-.2px}.case-card .case-detail{margin-top:8px}.case-card .scene{font-size:14px;color:var(--ink-2);background:var(--primary-soft);border-radius:10px;padding:12px 14px;margin:12px 0 14px;line-height:1.7}.case-list{margin-top:16px;border-top:1px dashed var(--line);padding-top:14px}.case-label{font-size:13px;color:var(--primary-deep);font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px;letter-spacing:.2px}.case-label:before{content:"";width:20px;height:3px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--primary-bright))}.case-detail{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden;transition:border-color .2s,box-shadow .2s}.case-detail:hover{border-color:var(--primary-light);box-shadow:var(--shadow-sm)}.case-detail>summary{cursor:pointer;padding:14px 18px;font-weight:600;color:var(--ink);font-size:15px;list-style:none;-webkit-user-select:none;user-select:none;display:flex;align-items:center;gap:10px;transition:background .2s}.case-detail>summary::-webkit-details-marker{display:none}.case-detail>summary:before{content:"＋";width:22px;height:22px;flex-shrink:0;border-radius:50%;background:var(--primary-light);color:var(--primary-deep);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;transition:all .25s}.case-index{width:26px;height:26px;flex-shrink:0;border-radius:8px;background:var(--primary-light);color:var(--primary-deep);font-size:12px;font-weight:700;font-family:SF Mono,Consolas,monospace;display:inline-flex;align-items:center;justify-content:center;transition:all .25s}.case-title{flex:1;min-width:0}.case-detail[open]>summary .case-index{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff}.case-detail[open]>summary:before{content:"−";background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;transform:rotate(180deg)}.case-detail[open]>summary{border-bottom:1px solid var(--line);background:linear-gradient(90deg,var(--primary-soft),#fff);color:var(--primary-deep)}.case-body{padding:10px 18px 18px;animation:case-in .25s ease}@keyframes case-in{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.case-body .lab{display:inline-block;min-width:38px;color:var(--primary-deep);font-weight:600}.case-body p{margin:8px 0;font-size:14px;line-height:1.7}.sec-title{font-size:21px;margin:34px 0 14px;padding:10px 16px;border-radius:10px;border-left:4px solid var(--primary);background:linear-gradient(90deg,var(--primary-soft),transparent);color:var(--ink);font-weight:700;letter-spacing:-.2px}.roadmap{display:flex;flex-direction:column;gap:16px}.road-item{padding:22px 26px;background:#fff;border-radius:16px;border:1px solid var(--line);border-left:4px solid var(--primary);transition:all .22s}.road-item:hover{box-shadow:var(--shadow);transform:translate(3px)}.road-phase{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:6px;display:flex;align-items:center;gap:8px}.road-phase:before{content:"";width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-bright));flex-shrink:0}.road-goal{margin:4px 0 8px;font-size:14px;color:var(--ink-2)}.road-metric{margin:10px 0 0;font-size:13px;color:var(--muted);background:var(--primary-soft);padding:10px 12px;border-radius:10px;line-height:1.7}.table-wrap{overflow-x:auto;margin:8px 0 4px;border-radius:12px;border:1px solid var(--line)}.role-table{width:100%;border-collapse:collapse;min-width:580px;font-size:14px}.role-table th,.role-table td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top;line-height:1.6}.role-table tr:last-child td{border-bottom:none}.role-table th{background:var(--ink);color:#fff;font-weight:600}.role-table tbody tr:nth-child(2n){background:var(--primary-soft)}.faq-wrap{display:flex;flex-direction:column;gap:10px;margin-top:8px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0;overflow:hidden;transition:all .2s}.faq-item:hover{border-color:var(--primary-light);box-shadow:var(--shadow-sm)}.faq-item>summary{list-style:none;cursor:pointer;padding:15px 18px;font-size:15px;font-weight:600;color:var(--ink);-webkit-user-select:none;user-select:none;display:flex;align-items:center;gap:12px;transition:background .2s}.faq-item>summary::-webkit-details-marker{display:none}.faq-item>summary:before{content:"＋";width:24px;height:24px;flex-shrink:0;border-radius:50%;background:var(--primary-light);color:var(--primary-deep);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;transition:all .25s}.faq-item[open]>summary:before{content:"−";background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;transform:rotate(180deg)}.faq-item[open]>summary{border-bottom:1px solid var(--line);background:linear-gradient(90deg,var(--primary-soft),#fff);color:var(--primary-deep)}.faq-a{padding:14px 18px;font-size:14px;line-height:1.75;color:var(--ink-2);animation:case-in .25s ease}.mini-hint{font-size:13px;color:var(--muted);margin:6px 0 0}.linkout{color:var(--primary);text-decoration:none;border-bottom:1px dashed var(--primary)}.linkout:hover{background:var(--primary-soft)}.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.pill{font-size:12px;background:var(--primary-light);color:var(--primary-deep);padding:4px 11px;border-radius:999px;font-weight:500}.hero{position:relative;padding:70px 0 40px;text-align:center;overflow:hidden;margin-bottom:30px}.hero:before{content:"";position:absolute;top:-180px;left:50%;transform:translate(-50%);width:700px;height:700px;background:radial-gradient(circle,rgba(110,91,216,.1),transparent 60%);z-index:0}.hero:after{content:"";position:absolute;top:40px;right:5%;width:260px;height:260px;background:radial-gradient(circle,rgba(144,128,255,.12),transparent 65%);z-index:0}.hero-content{position:relative;z-index:1}.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);padding:7px 16px;border-radius:999px;font-size:13px;color:var(--ink-2);margin-bottom:24px;box-shadow:var(--shadow-sm)}.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px #6e5bd826}.hero h1{font-size:52px;font-weight:800;line-height:1.15;letter-spacing:-1.2px;margin:0 0 18px}.hero h1 .accent{background:linear-gradient(120deg,var(--primary) 0%,var(--primary-bright) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}.hero p{font-size:17px;color:var(--ink-2);max-width:580px;margin:0 auto 30px;line-height:1.7}.hero-ctas{display:flex;gap:12px;justify-content:center}.hero-ctas .btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--line);padding:12px 24px;border-radius:12px;font-size:14.5px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .18s}.hero-ctas .btn-secondary:hover{border-color:var(--primary);color:var(--primary-deep)}.stats{display:grid;grid-template-columns:repeat(4,1fr);padding:32px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:40px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-sm)}.stat{text-align:center;position:relative}.stat:not(:last-child):after{content:"";position:absolute;right:0;top:20%;height:60%;width:1px;background:var(--line)}.stat-num{font-size:34px;font-weight:800;letter-spacing:-.5px;background:linear-gradient(135deg,var(--primary),var(--primary-bright));-webkit-background-clip:text;background-clip:text;color:transparent}.stat-label{font-size:13px;color:var(--muted);margin-top:6px;font-weight:500}.home-section{padding:40px 0 20px}.home-section .section-head{text-align:center;margin-bottom:44px}.home-section .section-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:12px}.home-section .section-title{font-size:36px;font-weight:800;letter-spacing:-.6px;margin-bottom:12px}.home-section .section-desc{font-size:15.5px;color:var(--muted);max-width:520px;margin:0 auto;line-height:1.7}.group-block{margin-bottom:40px}.group-block:last-child{margin-bottom:0}.group-title{display:flex;align-items:center;gap:12px;font-size:15px;font-weight:700;color:var(--ink);margin-bottom:18px;letter-spacing:.3px}.group-title:before{content:"";width:4px;height:18px;border-radius:2px;background:linear-gradient(180deg,var(--primary),var(--primary-bright))}.group-title small{font-weight:500;color:var(--muted);font-size:13px}.chapter-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.chapter-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px 22px 26px;transition:all .25s;cursor:pointer;position:relative;overflow:hidden;text-align:left;font-family:inherit}.chapter-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--primary-bright));transform:scaleX(0);transform-origin:left;transition:transform .3s}.chapter-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}.chapter-card:hover:before{transform:scaleX(1)}.chapter-num{display:inline-block;font-size:11px;font-weight:700;color:var(--primary-deep);background:var(--primary-light);padding:4px 10px;border-radius:6px;margin-bottom:14px;letter-spacing:.5px}.chapter-num.home{background:var(--ink);color:#fff}.chapter-card h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:var(--ink);letter-spacing:-.2px}.chapter-card p{font-size:13.5px;color:var(--ink-2);line-height:1.6;margin:0}.site-footer{margin-top:60px;background:#0f0e1f;color:#fff;padding:60px 0 26px}.footer-inner{max-width:1200px;margin:0 auto 40px;padding:0 32px;display:grid;grid-template-columns:1.3fr 1.1fr 1fr 1fr 1fr;gap:40px}.footer-brand{display:flex;flex-direction:column;gap:16px}.footer-brand img{height:40px;width:auto;max-width:200px;object-fit:contain;background:#fff;border-radius:10px;padding:8px 12px;display:block}.footer-brand p{color:#9b9bb5;font-size:14px;line-height:1.7;max-width:260px;margin:0}.footer-teacher{display:flex;align-items:center}.teacher-card{background:linear-gradient(160deg,#1e1a3d,#14122b);border:1px solid rgba(128,122,244,.28);border-radius:18px;padding:20px 20px 18px;display:flex;align-items:center;gap:16px;width:fit-content;position:relative;overflow:hidden;box-shadow:0 10px 30px #00000059}.teacher-card:before{content:"";position:absolute;top:-40px;right:-40px;width:130px;height:130px;background:radial-gradient(circle,rgba(128,122,244,.22),transparent 70%);pointer-events:none}.teacher-card:after{content:"";position:absolute;bottom:-30px;left:-30px;width:100px;height:100px;background:radial-gradient(circle,rgba(255,255,255,.06),transparent 70%);pointer-events:none}.teacher-qr{width:128px;height:128px;border-radius:14px;background:#fff;padding:6px;object-fit:cover;flex-shrink:0;border:2px solid rgba(128,122,244,.45);box-shadow:0 6px 18px #00000059}.teacher-info{position:relative;z-index:1;min-width:130px}.teacher-title{font-size:20px;font-weight:800;color:#fff;letter-spacing:.5px;display:flex;align-items:center;gap:8px;margin-bottom:6px}.teacher-title:before{content:"";width:6px;height:6px;border-radius:50%;background:#6fcf97;box-shadow:0 0 0 4px #6fcf972e;flex-shrink:0}.teacher-sub{font-size:12.5px;color:#a9a4d6;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:8px}.teacher-tip{font-size:12px;color:#9b9bb5;line-height:1.5;border-top:1px dashed rgba(128,122,244,.25);padding-top:8px}.footer-col h4{font-size:13px;font-weight:700;margin:0 0 16px;color:#fff;letter-spacing:.5px}.footer-col a{display:block;color:#9b9bb5;text-decoration:none;font-size:14px;padding:5px 0;transition:color .2s}.footer-col a:hover{color:#fff;opacity:1}.footer-bottom{max-width:1200px;margin:0 auto;padding:22px 32px 0;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;font-size:13px;color:#6b6b85;flex-wrap:wrap;gap:10px}.ai-fab{position:fixed;right:22px;bottom:22px;z-index:80;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-deep) 100%);color:#fff;border:none;border-radius:999px;padding:10px 20px 10px 10px;font-size:15px;font-weight:700;cursor:pointer;box-shadow:0 10px 28px #6e5bd866;transition:all .22s ease;display:flex;align-items:center;gap:10px;font-family:inherit}.ai-fab:hover{transform:translateY(-2px);box-shadow:0 14px 32px #6e5bd880}.ai-fab.hidden{display:none}.ai-fab .ai-fab-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;object-position:top center;border:2px solid rgba(255,255,255,.4);background:#fff}.ai-window{position:fixed;right:22px;bottom:22px;z-index:90;width:400px;max-width:calc(100vw - 32px);height:580px;max-height:calc(100vh - 60px);background:#fff;border-radius:20px;box-shadow:0 20px 60px #1a1a2e4d;display:flex;flex-direction:column;overflow:hidden;animation:ai-fade .22s ease}@keyframes ai-fade{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.ai-head{display:flex;align-items:center;gap:12px;padding:14px 18px;background:linear-gradient(135deg,#807af4,#6b65d8);color:#fff}.ai-head .ai-head-avatar{width:44px;height:44px;border-radius:50%;object-fit:cover;object-position:top center;border:2px solid rgba(255,255,255,.5);background:#fff;flex-shrink:0}.ai-head .ai-head-text{flex:1;min-width:0}.ai-title{font-size:15px;font-weight:700}.ai-sub{font-size:11px;opacity:.88;margin-top:2px}.ai-head-actions{display:flex;gap:6px;flex-shrink:0}.ai-reset,.ai-close{background:#fff3;color:#fff;border:none;border-radius:8px;padding:6px 10px;cursor:pointer;font-size:14px;font-family:inherit}.ai-reset:hover,.ai-close:hover{background:#ffffff4d}.ai-body{flex:1;overflow-y:auto;padding:16px 16px 8px;background:#fafafe}.ai-msg{display:flex;margin-bottom:12px;align-items:flex-end;gap:8px}.ai-msg.user{justify-content:flex-end}.ai-msg.assistant{justify-content:flex-start}.ai-msg .ai-msg-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;object-position:top center;background:#fff;border:1.5px solid var(--primary-light);flex-shrink:0}.ai-msg.user .ai-msg-avatar{display:none}.ai-bubble{max-width:78%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.65;white-space:pre-wrap;word-break:break-word}.ai-msg.user .ai-bubble{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;border-bottom-right-radius:4px}.ai-msg.assistant .ai-bubble{background:#fff;color:var(--ink);border:1px solid var(--line);border-bottom-left-radius:4px}.ai-bubble.thinking{color:var(--muted);font-style:italic;animation:ai-blink 1.2s infinite}@keyframes ai-blink{0%,to{opacity:.6}50%{opacity:1}}.ai-error{margin:8px 4px;padding:10px 14px;background:#fff6e6;border:1px solid #FFD89F;border-radius:10px;font-size:12.5px;color:#8a5b00;line-height:1.55}.ai-input-wrap{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:#fff}.ai-input{flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-size:14px;font-family:inherit;outline:none;transition:border-color .15s ease}.ai-input:focus{border-color:var(--primary)}.ai-send{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;border:none;border-radius:12px;padding:0 18px;font-size:14px;font-weight:600;cursor:pointer;align-self:stretch;font-family:inherit}.ai-send:disabled{background:#b8b4e8;cursor:not-allowed}@media (max-width: 980px){.topbar-inner{padding:0 18px;gap:12px}.topbar-nav{display:none}.topbar-actions{gap:8px}.topbar-actions .topbar-chat-label{display:none}.main{padding:24px 18px 40px}.page-title{font-size:26px}.hero{padding:40px 0 20px}.hero h1{font-size:36px}.hero p{font-size:15.5px}.skill-grid,.arch,.notes-grid{grid-template-columns:1fr}.footer-inner{grid-template-columns:1fr 1fr;gap:30px;padding:0 18px}.footer-teacher{justify-content:center}.teacher-card{flex-direction:column;text-align:center;padding:18px 20px}.teacher-info{min-width:0}.teacher-title{justify-content:center}.teacher-sub{letter-spacing:1px}.footer-bottom{padding:22px 18px 0;flex-direction:column;text-align:center}.dropdown-panel{padding:14px 18px 22px}.dropdown-item{font-size:15px;padding:12px 14px}.card{padding:18px}.card h2{font-size:19px}.ai-window{right:8px;bottom:8px;width:calc(100vw - 16px);height:calc(100vh - 80px);max-height:none}.ai-fab{right:14px;bottom:14px;padding:8px 14px 8px 8px;font-size:14px}.ai-fab .ai-fab-avatar{width:32px;height:32px}.chapter-grid{grid-template-columns:repeat(2,1fr);gap:12px}.home-section{padding:28px 0 10px}.home-section .section-title{font-size:26px}.group-title{font-size:14px;margin-bottom:14px}.group-title small{display:none}.chapter-card{padding:16px 16px 20px;border-radius:14px}.chapter-card h3{font-size:15px}.chapter-card p{font-size:12.5px;line-height:1.55}.stats{grid-template-columns:repeat(2,1fr);gap:22px;padding:24px 16px;margin-bottom:28px}.stat:nth-child(2):after{display:none}.stat-num{font-size:27px}.stat-label{font-size:12px}.topbar{height:62px}.topbar-logo{height:32px;max-width:150px}.menu-toggle{padding:8px 14px;font-size:13.5px}}@media (max-width: 480px){.main{padding:16px 14px 36px}.page-title{font-size:22px}.hero{padding:28px 0 12px}.hero h1{font-size:27px;letter-spacing:-.6px}.hero p{font-size:14.5px}.hero-badge{font-size:12px;padding:6px 12px}.hero-ctas{flex-direction:column;align-items:center;gap:10px}.hero-ctas .btn-primary,.hero-ctas .btn-secondary{width:100%;max-width:300px;text-align:center}.card{padding:16px 14px;border-radius:14px}.footer-inner{grid-template-columns:1fr}.home-section .section-title{font-size:22px}.chapter-grid{grid-template-columns:1fr;gap:10px}.stats{grid-template-columns:repeat(2,1fr);gap:16px;padding:20px 12px}}