:root{--blue: #002FA7;--blue-deep: #002480;--gold: #D4AF37;--bg: #F5F7FA;--card: #FFFFFF;--ink: #222222;--ink-sub: #666666;--line: #E5E9F2;--blue-soft: #F0F4FF;--radius: 14px;--shadow: 0 6px 24px rgba(0, 47, 167, .08)}*{box-sizing:border-box;margin:0;padding:0}html,body{font-family:PuHuiTi,-apple-system,PingFang SC,Microsoft YaHei,sans-serif}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}.topbar{background:linear-gradient(120deg,var(--blue),var(--blue-deep));position:sticky;top:0;z-index:100;box-shadow:0 2px 12px #002fa740}.topbar-inner{max-width:1160px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}.topbar-logo{display:flex;align-items:center;gap:10px;text-decoration:none}.topbar-logo img{height:30px}.topbar-logo .brand{color:#fff;font-size:16px;font-weight:700;letter-spacing:1px}.nav{display:flex;gap:22px;align-items:center}.nav a{position:relative;color:#ffffffd9;text-decoration:none;font-size:14px;padding:6px 2px}.nav a:before{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--gold);transition:right .25s ease}.nav a:hover:before,.nav a.router-link-active:before{right:0}.nav a:hover,.nav a.router-link-active{color:#fff}.nav a.nav-ai{border:1px solid rgba(212,175,55,.7);border-radius:6px;padding:5px 12px;color:#e8cf86}.nav a.nav-ai:hover{color:#fff;border-color:var(--gold)}.topbar-right{display:flex;align-items:center;gap:10px;color:#fff;font-size:13px}.topbar-right .btn-ghost{color:#fff;text-decoration:none;padding:7px 18px;border:1px solid rgba(255,255,255,.5);border-radius:18px}.topbar-right .btn-gold{display:inline-block;padding:7px 20px;border-radius:18px;background:linear-gradient(135deg,var(--gold),#b8912e);color:#1a1a1a;text-decoration:none;font-weight:700;font-size:13px}.topbar-right .user{display:flex;align-items:center;gap:8px}.topbar-right .user .name{color:#fff;cursor:pointer}.wrap{max-width:1160px;margin:0 auto;padding:28px 20px 60px}.page-head{margin-bottom:24px}.page-head .tag{display:inline-block;font-size:12px;letter-spacing:3px;color:var(--gold);font-weight:700;margin-bottom:8px}.page-head h1{font-size:28px;color:var(--ink);letter-spacing:1px}.article-body{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);padding:24px;line-height:1.9;color:var(--ink);font-size:14.5px}.article-body img{max-width:100%;height:auto;border-radius:8px;margin:12px 0}.article-body p{margin:10px 0}.article-body h1,.article-body h2,.article-body h3,.article-body h4{margin:18px 0 10px}.article-body blockquote{border-left:3px solid var(--gold);padding-left:12px;color:var(--ink-sub);margin:10px 0}.article-body ul,.article-body ol{padding-left:22px;margin:10px 0}.page-head p{color:var(--ink-sub);margin-top:6px;font-size:14px}.tabs{display:flex;gap:0;border-bottom:2px solid var(--line);margin-bottom:24px}.tab{padding:12px 26px;font-size:15px;font-weight:600;color:var(--ink-sub);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:color .2s}.tab:hover{color:var(--blue)}.tab.active{color:var(--blue);border-bottom-color:var(--blue)}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.hscroll-wrap{position:relative}.hscroll{display:flex;gap:14px;overflow-x:auto;padding:6px 2px 12px;scroll-snap-type:x mandatory;scrollbar-width:none}.hscroll::-webkit-scrollbar{display:none}.card{background:var(--card);border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .22s,box-shadow .22s;cursor:pointer;display:flex;flex-direction:column}.hscroll .card{flex:none;width:264px;scroll-snap-align:start}.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px #002fa724}.card-cover{position:relative;aspect-ratio:16/9;background:var(--blue-soft)}.card-cover img{width:100%;height:100%;object-fit:cover;display:block}.board-cover{background:#0d0f1a}.board-cover img{object-fit:cover;padding:0}.card-cover .placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:var(--blue);font-weight:700;font-size:13px}.badge{position:absolute;top:8px;left:-6px;padding:3px 10px 3px 8px;border-radius:0 16.5px 16.5px 0;color:#fff;font-size:12px;font-weight:600;line-height:16px;z-index:2;box-shadow:0 3px 8px #0000002e}.badge:before{content:"";position:absolute;bottom:-2px;left:0;border-width:2px;border-style:solid}.badge.free{background:linear-gradient(90.12deg,#59ccb2 .1%,#0bb861 99.9%)}.badge.free:before{border-color:#0a4e3f #0a4e3f transparent transparent}.badge.vip{background:linear-gradient(90.12deg,#e4c566 .1%,#b8912e 99.9%)}.badge.vip:before{border-color:#6b5516 #6b5516 transparent transparent}.badge-course{position:absolute;right:10px;bottom:10px;padding:2px 8px;border-radius:3px;background:#282c34bf;color:#fff;font-size:11px}.card-body{padding:14px 16px 16px;display:flex;flex-direction:column;flex:1}.card-body h3{font-size:15px;font-weight:700;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.card-body .sell{font-size:12px;color:var(--ink-sub);margin-top:4px;line-height:1.6;height:20px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.card-rating{display:flex;align-items:center;gap:6px;margin-top:6px}.card-rating .stars{color:#f5a623;font-size:12px;letter-spacing:1px}.card-rating .stars .ghost{color:#e3e6ec}.card-rating .rate-num{color:#f5a623;font-size:12px;font-weight:700}.card-learn{margin-top:auto;padding-top:10px}.card-learn .btn-learn{display:block;width:100%;padding:5px 0;border-radius:6px;background:#f2f4f7;color:#e67e22;font-size:13px;font-weight:500;text-align:center;border:none;cursor:pointer;transition:all .2s}.card-learn .btn-learn:hover{background:#ff6b00;color:#fff}.hscroll-btn{position:absolute;right:-6px;top:50%;transform:translateY(-50%);width:40px;height:40px;border-radius:50%;background:#fff;border:none;box-shadow:0 4px 16px #00000024;color:#8a8f99;font-size:16px;cursor:pointer;z-index:3;display:flex;align-items:center;justify-content:center}.hscroll-btn:hover{color:var(--blue)}.btn-go{display:inline-block;padding:8px 22px;border-radius:18px;background:var(--blue);color:#fff;text-decoration:none;font-size:13px;font-weight:600}.btn-gold{display:inline-block;padding:10px 26px;border-radius:20px;background:linear-gradient(135deg,var(--gold),#b8912e);color:#1a1a1a;text-decoration:none;font-size:14px;font-weight:700}.detail-hero{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);padding:24px;margin-bottom:18px}.detail-hero .cover{width:100%;aspect-ratio:21/9;border-radius:10px;overflow:hidden;background:var(--blue-soft)}.detail-hero .cover img{width:100%;height:100%;object-fit:cover}.detail-hero h1{font-size:22px;font-weight:800;margin-top:16px}.detail-hero .sell{color:var(--ink-sub);font-size:14px;margin-top:8px;line-height:1.7}.detail-hero .meta{display:flex;gap:18px;margin-top:12px;color:var(--ink-sub);font-size:13px}.detail-hero .cta{margin-top:16px}.chapter{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden}.chapter-head{padding:14px 18px;font-weight:700;font-size:14px;border-bottom:1px solid var(--line);background:#fafbff}.lesson{display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid var(--line);cursor:pointer}.lesson:last-child{border-bottom:none}.lesson:hover{background:var(--blue-soft)}.lesson .icon{width:20px;text-align:center;color:var(--ink-sub)}.lesson .title{flex:1;font-size:14px}.lesson .trial-tag{font-size:11px;color:var(--blue);background:var(--blue-soft);padding:2px 8px;border-radius:10px}.lesson .vip-tag{font-size:11px;color:#1a1a1a;background:linear-gradient(135deg,var(--gold),#b8912e);padding:2px 8px;border-radius:10px}.login-card{max-width:400px;margin:60px auto;background:var(--card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);padding:34px 30px}.login-card h2{text-align:center;font-size:20px;margin-bottom:22px}.field{margin-bottom:14px}.field label{display:block;font-size:13px;color:var(--ink-sub);margin-bottom:6px}.field input{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:14px;outline:none}.field input:focus{border-color:var(--blue)}.err{color:#d33;font-size:13px;text-align:center;margin-top:10px;min-height:18px}.login-btn{width:100%;padding:12px;border:none;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;font-size:15px;font-weight:700;cursor:pointer;margin-top:6px}.switch{text-align:center;margin-top:14px;font-size:13px;color:var(--ink-sub)}.switch a{color:var(--blue);cursor:pointer;text-decoration:none}.layer-card{flex:none;width:250px;scroll-snap-align:start;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 16px}.layer-tag{display:inline-block;padding:2px 10px;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-size:11px;font-weight:700}.layer-card h3{font-size:18px;font-weight:800;margin:10px 0 4px}.layer-desc{font-size:13px;color:var(--ink-sub)}.layer-points{font-size:12px;color:var(--blue);margin-top:12px;line-height:1.7;border-top:1px dashed var(--line);padding-top:10px}.learn-top{display:flex;align-items:center;margin-bottom:12px}.lb-back{display:inline-block;padding:6px 20px;border-radius:18px;background:linear-gradient(135deg,var(--gold),#b8912e);color:#1a1a1a;font-size:13px;font-weight:700;text-decoration:none;cursor:pointer;transition:opacity .2s}.lb-back:hover{opacity:.9}.learn-foot{margin-top:22px;padding-top:14px;border-top:1px solid var(--line);display:flex;justify-content:flex-end}.lb-home{color:var(--ink-sub);font-size:13px;text-decoration:none}.lb-home:hover{color:var(--blue)}.learn-layout{display:grid;grid-template-columns:1fr 300px;gap:18px}.video-area{background:#0d0f1a;border-radius:var(--radius);aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;overflow:hidden}.video-area img{width:100%;height:100%;object-fit:cover}.video-area video{width:100%;height:100%}.learn-side{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);padding:14px;max-height:70vh;overflow-y:auto}.learn-side h4{font-size:14px;margin-bottom:10px}.learn-side .l{display:flex;gap:8px;align-items:center;padding:9px 8px;border-radius:8px;cursor:pointer;font-size:13px}.learn-side .l:hover{background:var(--blue-soft)}.learn-side .l.active{background:var(--blue-soft);color:var(--blue);font-weight:700}.learn-side .l .done{color:var(--gold)}.mine-card{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);padding:18px 20px;margin-bottom:14px;display:flex;align-items:center;gap:16px}.mine-card .thumb{width:120px;aspect-ratio:16/9;border-radius:8px;background:var(--blue-soft);overflow:hidden;flex:none}.mine-card .thumb img{width:100%;height:100%;object-fit:cover}.mine-card .info{flex:1}.mine-card .info h3{font-size:15px}.mine-card .info .pct{font-size:13px;color:var(--ink-sub);margin-top:6px}.mine-card .continue{color:var(--blue);font-size:13px;text-decoration:none;font-weight:600}.hero{background:linear-gradient(135deg,var(--blue) 0%,#1037c9 55%,var(--blue-deep) 100%);position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.14),transparent 60%)}.hero:after{content:"";position:absolute;bottom:-160px;left:-60px;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(212,175,55,.18),transparent 60%)}.hero-inner{max-width:1160px;margin:0 auto;padding:44px 20px 48px;position:relative;z-index:1}.hero-tag{color:var(--gold);font-size:12px;letter-spacing:4px;font-weight:700}.hero h1{color:#fff;font-size:38px;font-weight:900;line-height:1.22;margin:6px 0;letter-spacing:1px}.hero p{color:#ffffffd1;font-size:15px}.hero-slogan{display:block;font-size:28px;font-weight:700;color:#fff;margin-bottom:6px}.hero-cta{display:flex;gap:14px;margin-top:22px;align-items:center}.btn-gold.big{padding:11px 30px;font-size:14px;border-radius:22px;cursor:pointer}.btn-ghost-w{display:inline-block;padding:10px 26px;border:1px solid rgba(255,255,255,.55);border-radius:22px;color:#fff;font-size:13px;cursor:pointer;transition:background .2s}.btn-ghost-w:hover{background:#ffffff1f}.proof-bar{display:flex;justify-content:space-around;background:var(--blue);border-radius:var(--radius);padding:26px 20px;margin-top:44px;color:#ffffffd9;font-size:14px}.proof-bar b{display:block;font-size:30px;color:#fff;margin-bottom:4px}.cta-card{display:flex;align-items:center;justify-content:space-between;gap:18px;background:linear-gradient(120deg,#fdf8ec,#fff);border:1px solid #EFE3C2;border-radius:var(--radius);padding:26px 28px;margin-top:18px}.cta-card h3{font-size:19px;font-weight:800}.cta-card p{color:var(--ink-sub);font-size:13px;margin-top:6px}@media (max-width: 900px){.hero h1{font-size:34px}}@media (max-width: 640px){.hero-inner{padding:52px 16px 60px}.hero h1{font-size:28px}.proof-bar{flex-wrap:wrap;gap:12px}.cta-card{flex-direction:column;align-items:flex-start}}.course-top{background:linear-gradient(135deg,var(--blue) 0%,#1037c9 60%,var(--blue-deep) 100%)}.course-top-inner{max-width:1160px;margin:0 auto;padding:40px 20px 44px;display:flex;gap:26px;align-items:center;justify-content:space-between}.ct-info{flex:1}.ct-tag{display:inline-block;padding:3px 12px;border-radius:12px;background:#d4af372e;color:var(--gold);font-size:12px;font-weight:700}.ct-info h1{color:#fff;font-size:30px;font-weight:900;margin:12px 0 8px}.ct-sub{color:#ffffffd1;font-size:14px}.ct-meta{display:flex;gap:16px;color:#ffffffb3;font-size:12px;margin:12px 0 20px}.ct-cover{flex:none;width:200px;height:120px;border-radius:12px;overflow:hidden;box-shadow:0 8px 24px #00000040}.ct-cover img{width:100%;height:100%;object-fit:cover}.dh-title{font-size:18px;margin-bottom:8px}.sec-block{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin-top:18px}.sec-title{font-size:18px;font-weight:800;display:flex;align-items:baseline;gap:10px;margin-bottom:16px}.sec-sub{font-size:12px;color:var(--ink-sub);font-weight:400}.sub-title{font-size:14px;font-weight:700;color:var(--blue);margin:18px 0 12px;padding-left:10px;border-left:3px solid var(--blue)}.lesson-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.lesson-tabs span{padding:6px 14px;border:1px solid var(--line);border-radius:16px;font-size:13px;color:var(--ink-sub);cursor:pointer;transition:all .2s}.lesson-tabs span.active{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:600}.lesson-list{display:flex;flex-direction:column;gap:10px}.lesson-row{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:12px;padding:10px 14px;cursor:pointer;transition:border-color .2s,box-shadow .2s}.lesson-row:hover{border-color:var(--blue);box-shadow:var(--shadow)}.lr-cover{flex:none;width:120px;height:68px;border-radius:8px;overflow:hidden;background:var(--blue-soft);display:flex;align-items:center;justify-content:center}.lr-cover img{width:100%;height:100%;object-fit:cover}.lr-ph{color:var(--blue);font-size:20px}.lr-info{flex:1}.lr-title{font-size:14px;font-weight:700}.lr-meta{display:flex;gap:10px;margin-top:6px;font-size:12px;color:var(--ink-sub);align-items:center}.hd-tag{padding:1px 8px;border-radius:8px;background:var(--blue-soft);color:var(--blue);font-weight:700;font-size:11px}.lr-play{flex:none;width:34px;height:34px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:14px}@media (max-width: 640px){.course-top-inner{flex-direction:column-reverse;align-items:flex-start}.ct-cover{width:100%;height:150px}.ct-info h1{font-size:24px}}.board{background:var(--card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);padding:20px;margin-bottom:18px}.board.off{opacity:.65}.board-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}.board-head h2{font-size:18px;font-weight:800;display:flex;align-items:center;gap:10px}.board-head p{color:var(--ink-sub);font-size:13px;margin-top:5px}.badge-s{display:inline-block;padding:2px 10px;border-radius:10px;font-size:11px;font-weight:700}.badge-s.free{background:var(--blue);color:#fff}.badge-s.vip{background:linear-gradient(135deg,var(--gold),#b8912e);color:#1a1a1a}.badge-s{background:var(--line);color:var(--ink-sub)}.bh-right{flex:none}.btn-gold.small{padding:8px 18px;font-size:13px;border-radius:18px;cursor:pointer}.btn-go{cursor:pointer}.board-scroll{display:flex;gap:12px;overflow-x:auto;padding-bottom:6px;scroll-snap-type:x mandatory}.board-scroll::-webkit-scrollbar{height:6px}.board-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}.board-card{flex:none;width:168px;scroll-snap-align:start;background:#fafbff;border:1px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;transition:transform .2s,box-shadow .2s}.board-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--blue)}.b-icon{width:40px;height:40px;border-radius:10px;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:10px}.b-title{font-size:13px;font-weight:700;line-height:1.4;min-height:36px}.b-meta{display:flex;align-items:center;justify-content:space-between;margin-top:8px;font-size:11px;color:var(--ink-sub)}.board-empty{color:var(--ink-sub);font-size:13px;padding:18px;text-align:center;background:#fafbff;border-radius:10px}.mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}.apply-card{width:100%;max-width:380px;background:#fff;border-radius:var(--radius);padding:26px 24px;box-shadow:0 20px 60px #00000040}.apply-card h3{font-size:17px;margin-bottom:18px;text-align:center}.apply-ok{text-align:center;padding:8px 0}.ok-icon{width:56px;height:56px;margin:0 auto 14px;border-radius:50%;background:#e6f7ee;color:#17b26a;font-size:28px;font-weight:800;display:flex;align-items:center;justify-content:center}.apply-ok h3{margin-bottom:8px}.apply-ok p{color:var(--ink-sub);font-size:13px;line-height:1.8;margin-bottom:20px}.footer{background:var(--blue-deep)}.footer-inner{max-width:1160px;margin:0 auto;padding:24px 20px 28px;text-align:center}.footer a{color:#ffffffb3;text-decoration:none;font-size:13px}@media (max-width: 900px){.grid{grid-template-columns:repeat(2,1fr)}.learn-layout{grid-template-columns:1fr}.nav{gap:14px}}@media (max-width: 640px){.grid{grid-template-columns:1fr}.topbar-inner{padding:10px 14px;flex-wrap:wrap}.nav{width:100%;order:3;gap:12px;overflow-x:auto}.nav a{font-size:13px;white-space:nowrap}.detail-hero{padding:16px}.detail-hero h1{font-size:18px}}