:root{color-scheme:dark;--bg:#07080c;--card:#121318;--card2:#181a20;--text:#f4f4f5;--muted:#a1a1aa;--line:rgba(255,255,255,.08);--hot:#ff1f4b;--orange:#ff6b00;--soft:rgba(255,31,75,.16)}
*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font-family:"Segoe UI",system-ui,-apple-system,sans-serif}
body{min-height:100vh;overflow-x:hidden}img{max-width:100%;display:block}button,input{font:inherit}
a{color:inherit}
.sp-top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:10px;min-height:64px;padding:8px 16px;background:rgba(7,8,12,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.menu-btn{width:42px;height:42px;border-radius:14px;border:1px solid rgba(255,31,75,.55);background:transparent;color:var(--text);display:grid;place-items:center;cursor:pointer;flex:0 0 auto}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-width:0;flex:1 1 auto}
.brand img{width:34px;height:34px;border-radius:9px;flex:0 0 auto}
.brand span{min-width:0;overflow:hidden}
.brand b{display:block;font-size:clamp(13px,3.4vw,18px);letter-spacing:.04em;line-height:1.1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand small{display:block;margin-top:3px;color:var(--hot);font-size:10px;font-weight:800;letter-spacing:.12em;white-space:nowrap}
.sp-nav{margin-left:auto;display:flex;align-items:center;gap:8px;flex:0 0 auto;flex-wrap:nowrap}
.sp-nav a{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--text);font-weight:700;font-size:14px;white-space:nowrap;min-height:36px}
.sp-nav a svg{color:var(--hot)}
.count{min-width:22px;height:22px;padding:0 6px;border-radius:99px;display:inline-grid;place-items:center;background:#27272a;color:#fff;font-size:12px}
.wrap{width:min(1120px,calc(100% - 28px));margin:0 auto;padding:18px 0 28px}
.search{display:block;margin:0 0 18px}
.search input{width:100%;height:52px;border-radius:16px;border:1px solid var(--line);background:#121318;color:var(--text);padding:0 16px;outline:none}
.search input:focus{border-color:rgba(255,31,75,.7)}
.kicker{margin:0 0 12px;color:#71717a;font-size:12px;font-weight:800;letter-spacing:.12em}
.goal-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.goal{display:flex;align-items:center;gap:12px;min-height:72px;padding:12px 14px;border-radius:16px;border:1px solid var(--line);background:#101116;text-decoration:none;min-width:0}
.goal i{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;color:var(--hot);background:var(--soft);flex:0 0 auto;font-style:normal}
.goal b{font-size:14px;font-weight:700;line-height:1.3;min-width:0;overflow-wrap:anywhere}
.goal[hidden]{display:none}
.back{display:inline-flex;align-items:center;gap:8px;margin:0 0 16px;color:#d4d4d8;text-decoration:none;font-weight:700}
.teacher-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.teacher{display:flex;gap:14px;align-items:center;min-height:118px;padding:16px;border-radius:18px;border:1px solid var(--line);background:#101116;text-decoration:none;min-width:0}
.teacher img,.avatar-fallback{width:72px;height:72px;border-radius:50%;object-fit:cover;background:#27272a;flex:0 0 auto}
.teacher h3{margin:0 0 4px;font-size:20px;line-height:1.25;overflow-wrap:anywhere}
.teacher p,.teacher em{display:block;margin:0;color:var(--muted);font-style:normal;font-size:13px}
.teacher em{display:inline-flex;align-items:center;gap:6px;margin-top:8px;padding:4px 8px;border-radius:99px;color:var(--hot);background:var(--soft);font-weight:700}
.more{display:block;width:min(280px,100%);margin:22px auto 0;min-height:46px;border-radius:14px;border:1px solid var(--line);background:#18181b;color:#fff;text-decoration:none;font-weight:800;text-align:center;line-height:46px}
.hero{display:grid;justify-items:center;text-align:center;padding:12px 0 8px}
.hero img,.hero .avatar-fallback{width:132px;height:132px;border-radius:50%;object-fit:cover;border:3px solid var(--hot);box-shadow:0 0 0 10px rgba(255,31,75,.12)}
.hero-name{margin:16px 0 0;font-size:clamp(26px,5vw,34px);line-height:1.15;color:var(--hot);overflow-wrap:anywhere}
.switch{display:flex;width:min(360px,100%);margin:18px auto 22px;padding:4px;border-radius:14px;background:#18181b;border:1px solid var(--line)}
.switch a{flex:1;min-height:42px;border-radius:11px;display:grid;place-items:center;text-decoration:none;font-weight:800;letter-spacing:.06em;color:#a1a1aa}
.switch a.on{background:linear-gradient(90deg,var(--hot),var(--orange));color:#fff}
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.course-card{position:relative;min-width:0;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#14151a}
.shot{display:block;aspect-ratio:16/10;background:#1c1c22}
.shot img{width:100%;height:100%;object-fit:cover}
.course-card .enroll{position:absolute;top:10px;right:10px;z-index:2;min-height:32px;padding:0 10px;border-radius:99px;border:1px solid var(--hot);background:rgba(8,8,10,.72);color:#fff;font-size:12px;font-weight:800;cursor:pointer}
.course-card .enroll.on{background:linear-gradient(90deg,var(--hot),var(--orange));border-color:transparent}
.course-card .meta{display:block;padding:14px;text-decoration:none}
.course-card h3{margin:0 0 6px;font-size:16px;line-height:1.35;overflow-wrap:anywhere}
.course-card p{margin:0;color:var(--muted);font-size:13px}
.list{display:grid;gap:14px}
.lesson{padding:18px;border-radius:18px;border:1px solid var(--line);background:#101116}
.lesson .tag{margin:0 0 8px;color:var(--hot);font-size:12px;font-weight:800;letter-spacing:.08em}
.lesson h3{margin:0 0 8px;font-size:22px;line-height:1.3;overflow-wrap:anywhere}
.who{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:13px;margin-bottom:14px}
.who span{display:inline-flex;align-items:center;gap:6px}
.acts{display:flex;flex-wrap:wrap;gap:10px}
.watch,.notes{min-height:42px;padding:0 16px;border-radius:12px;display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:800}
.watch{color:#fff;background:linear-gradient(90deg,var(--hot),var(--orange))}
.notes{color:var(--text);border:1px solid rgba(255,31,75,.7);background:transparent}
.page-title{margin:8px 0 18px;color:var(--hot);font-size:clamp(24px,4vw,36px);line-height:1.15;overflow-wrap:anywhere}
.empty{padding:28px 8px;text-align:center;color:var(--muted)}
.empty a{color:var(--hot)}
.notes-frame{width:100%;height:min(72vh,820px);border:1px solid var(--line);border-radius:16px;background:#fff}
.site-foot{margin-top:28px;padding:8px 0 4px;color:#a8a29e;font-size:14px;min-width:0}
.f-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.f-brand img{width:36px;height:36px;border-radius:10px;box-shadow:0 6px 18px rgba(255,31,75,.4);flex:0 0 auto}
.f-brand b{font-size:18px;display:inline-flex;align-items:center;gap:6px}
.f-brand b em{font-style:normal;background:linear-gradient(135deg,#ff1f4b,#ff6b00);color:#fff;border-radius:7px;padding:2px 7px;font-size:14px}
.f-brand b span{background:linear-gradient(90deg,#fff,#ffe4ea 55%,#ff8c3b);-webkit-background-clip:text;background-clip:text;color:transparent}
.blurb{max-width:560px;margin:10px 0 16px;font-size:14px;line-height:1.55;color:#a8a29e;overflow-wrap:anywhere}
.flinks{display:flex;flex-wrap:wrap;gap:14px 16px;align-items:center;margin:0;font-size:14px}
.flinks a{color:#d6d3d1;text-decoration:none}
.flinks a.hot{color:#ff4b6e;font-weight:700}
.flinks a.study{color:#38bdf8;font-weight:700}
.install{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:6px 12px;color:#fff;font-weight:800;font-size:13px;text-decoration:none;background:linear-gradient(135deg,#ff1f4b,#ff6b00);box-shadow:0 4px 12px rgba(255,31,75,.35)}
.dmca{margin-top:18px;background:rgba(229,9,20,.06);border:1px solid rgba(229,9,20,.24);border-radius:12px;padding:15px 16px;min-width:0}
.dmca strong.head{display:flex;align-items:flex-start;gap:7px;color:#f87171;font-size:13px;letter-spacing:.04em;text-transform:uppercase}
.dmca strong.head svg{flex:0 0 auto;margin-top:1px}
.dmca p,.dmca code{overflow-wrap:anywhere}
.dmca p{margin:8px 0 0;color:#d1d5db;font-size:13px;line-height:1.6}
.f-end{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-top:14px;padding-top:12px;border-top:1px solid rgba(255,255,255,.06);font-size:12px;color:#78716c}
.f-end span{min-width:0;overflow-wrap:anywhere}
.foot-gap{display:none;height:0}
.bottom{position:fixed;left:0;right:0;bottom:0;z-index:25;display:none;flex-wrap:nowrap;justify-content:space-around;gap:4px;padding:8px 6px calc(8px + env(safe-area-inset-bottom));background:rgba(7,8,12,.97);border-top:1px solid var(--line)}
.bottom a{flex:1 1 0;min-width:0;color:#a1a1aa;text-decoration:none;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:11px;font-weight:800;white-space:nowrap;line-height:1.1}
.bottom a.on,.bottom a:hover{color:#fff}
.bottom svg{flex:0 0 auto}
.drawer-bg{position:fixed;inset:0;z-index:40;background:rgba(0,0,0,.55)}
.drawer-bg[hidden]{display:none}
.drawer{position:fixed;top:0;left:0;bottom:0;z-index:41;width:min(300px,86vw);background:#0d0e12;border-right:1px solid var(--line);padding:16px;overflow:auto}
.drawer-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.drawer-head b{font-size:18px}.drawer-head b span{color:var(--hot)}
.drawer-x{margin-left:auto;width:36px;height:36px;border:0;border-radius:50%;background:#27272a;color:#fff;display:grid;place-items:center;cursor:pointer;flex:0 0 auto}
.drawer a,.drawer button.linkish{display:flex;align-items:center;gap:10px;width:100%;min-height:48px;padding:0 8px;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--text);text-decoration:none;font-weight:700;text-align:left;cursor:pointer}
.ofc-tg-pop{position:fixed;inset:0;z-index:9000;display:flex;align-items:center;justify-content:center;padding:16px;background:rgba(0,0,0,.62)}
.ofc-tg-pop[hidden]{display:none!important}
.ofc-tg-card{position:relative;width:min(380px,100%);background:#141218;color:#fff;border:1px solid rgba(255,31,75,.5);border-radius:22px;padding:28px 20px 18px;text-align:center}
.ofc-tg-x{position:absolute;top:10px;right:10px;width:36px;height:36px;border:0;border-radius:50%;background:transparent;color:#a8a29e;cursor:pointer}
.ofc-tg-mark{width:64px;height:64px;margin:0 auto 12px;border-radius:18px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--hot),var(--orange))}
.ofc-tg-kicker{margin:0;color:#ff4b6e;font-size:11px;font-weight:800;letter-spacing:.12em}
.ofc-tg-card h2{margin:6px 0 8px}.ofc-tg-copy{margin:0 0 16px;color:#d6d3d1;line-height:1.5}
.ofc-tg-go{display:flex;align-items:center;justify-content:center;min-height:46px;border-radius:12px;text-decoration:none;color:#fff;font-weight:800;background:linear-gradient(90deg,var(--hot),var(--orange))}
.ofc-tg-later{margin-top:8px;width:100%;min-height:40px;border:0;background:transparent;color:#a8a29e;font-weight:700;cursor:pointer}
html[data-theme="light"]{color-scheme:light;--bg:#f6f3ef;--card:#fff;--card2:#fff;--text:#1c1917;--muted:#57534e;--line:#e7e5e4}
html[data-theme="light"] .sp-top,html[data-theme="light"] .drawer,html[data-theme="light"] .goal,html[data-theme="light"] .teacher,html[data-theme="light"] .lesson,html[data-theme="light"] .course-card,html[data-theme="light"] .dmca,html[data-theme="light"] .search input,html[data-theme="light"] .switch,html[data-theme="light"] .more{background:#fff;color:#1c1917}
html[data-theme="light"] .site-foot,html[data-theme="light"] .kicker,html[data-theme="light"] .who{color:#57534e}
html[data-theme="light"] .bottom{background:rgba(255,255,255,.97)}
html[data-theme="light"] .bottom a{color:#57534e}
html[data-theme="light"] .bottom a.on{color:#1c1917}
html[data-theme="light"] .f-brand{color:#1c1917}
html[data-theme="light"] .f-brand b span{background:linear-gradient(90deg,#1c1917,#ff6b00);-webkit-background-clip:text;background-clip:text;color:transparent}
html[data-theme="light"] .blurb,html[data-theme="light"] .f-end{color:#57534e}
html[data-theme="light"] .flinks a{background:transparent;color:#44403c}
html[data-theme="light"] .flinks a.hot{color:#e11d48}
html[data-theme="light"] .flinks a.study{color:#0284c7}
html[data-theme="light"] .install{color:#fff}
html[data-theme="light"] .dmca{background:rgba(229,9,20,.05)}
html[data-theme="light"] .dmca p{color:#44403c}
html[data-theme="light"] .ofc-tg-card{background:#fff;color:#1c1917}
html[data-theme="light"] .ofc-tg-copy{color:#57534e}
html[data-theme="light"] .ofc-tg-later,html[data-theme="light"] .back{color:#57534e}
@media(max-width:860px){.goal-grid,.course-grid{grid-template-columns:1fr 1fr}.teacher-grid{grid-template-columns:1fr}}
@media(max-width:720px){.wrap{width:min(1120px,calc(100% - 20px))}.sp-top{padding:8px 10px}.lesson h3{font-size:18px}.sp-nav{gap:6px}.sp-nav a{font-size:13px;gap:4px}.f-end{font-size:11px}}
@media(max-width:639px){.sp-nav{display:none}.bottom{display:flex}.foot-gap{display:block;height:76px}.notes-frame{height:calc(100dvh - 240px)}}
@media(max-width:420px){.goal-grid,.course-grid{grid-template-columns:1fr}.acts{display:grid}.watch,.notes{justify-content:center}}