.contact .wechat-contact{display:flex;flex-direction:column;align-items:flex-end;gap:10px}.wechat-qr{width:192px;height:auto;border-radius:5px;display:block;background:#fff}.contact small{color:var(--muted);font-size:11px}.tutorial-section{margin:35px 0 50px;scroll-margin-top:110px}.tutorial-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px}.tutorial-heading h2{margin:0;font-size:25px}.tutorial-heading p{color:var(--muted);font-size:13px}.tutorial-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.tutorial-card{border:1px solid var(--line);background:var(--panel);padding:0;color:var(--text);text-align:left;cursor:pointer;overflow:hidden;border-radius:6px;font:inherit}.tutorial-cover{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#203a3d,#0a171b);position:relative}.tutorial-cover:before{content:'';width:58px;height:58px;border:1px solid #76e4ad66;border-radius:50%;background:#76e4ad16}.tutorial-cover:after{content:'';position:absolute;border-left:15px solid var(--green);border-top:9px solid transparent;border-bottom:9px solid transparent;transform:translateX(3px)}.tutorial-info{display:block;padding:17px}.tutorial-info strong{display:block;font-size:16px;line-height:1.5}.tutorial-info span{display:block;color:var(--muted);font-size:12px;margin-top:8px;line-height:1.7;overflow-wrap:anywhere}.tutorial-card:hover,.tutorial-card:focus-visible{border-color:var(--green);outline:none}.tutorial-empty{border:1px dashed var(--line);padding:28px;color:var(--muted);font-size:14px;line-height:1.8}.tutorial-dialog{width:min(1000px,94vw);max-height:92vh;background:#10191e;color:var(--text);border:1px solid #47616b;border-radius:8px;padding:20px}.tutorial-dialog::backdrop{background:#000c}.tutorial-dialog header{display:flex;align-items:center;justify-content:space-between;gap:15px}.tutorial-dialog 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input[type=checkbox]{accent-color:#76e4ad}.admin-button.primary{background:#a6f1cf;color:#112e29;font-weight:650}.admin-button.danger{color:#ff9a94}.admin-message{min-height:24px;color:#f0c782;font-size:13px;line-height:1.8;overflow-wrap:anywhere}.admin-shell button:disabled{opacity:.45;cursor:wait}.admin-workspace{display:grid;grid-template-columns:340px minmax(0,1fr);gap:30px;margin-top:28px}.admin-panel{background:var(--panel);padding:24px;border:1px solid var(--line);border-radius:6px;align-self:start}.admin-panel h2{font-size:20px;margin:0}.admin-panel p{color:var(--muted);font-size:12px;line-height:1.9}.admin-panel progress{width:100%;accent-color:var(--green);margin-top:18px}.admin-panel .inline-label{display:flex;align-items:center;gap:8px}.admin-upload-actions{margin-top:20px;display:flex;gap:10px}.admin-video-row{border:1px solid var(--line);padding:20px;border-radius:5px;margin:16px 0;background:#101a20}.admin-video-row h3{font-size:16px;margin:0}.admin-video-row .row-tools{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.admin-video-row .row-meta{font-size:12px;color:var(--muted)}.admin-video-row .row-options{display:flex;gap:20px;align-items:center}.admin-video-row .row-options input[type=number]{width:100px}.admin-shell [hidden],.tutorial-dialog[hidden]{display:none!important}@media(max-width:900px){.tutorial-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-workspace{grid-template-columns:1fr}.admin-panel{min-width:0}}@media(max-width:600px){.tutorial-grid{grid-template-columns:1fr}.tutorial-heading{align-items:flex-start;flex-direction:column;gap:3px}.contact .wechat-contact{align-items:flex-start}.admin-shell{padding:15px}.admin-header{align-items:flex-start;flex-direction:column}.admin-login{margin:30px auto;padding:22px}.admin-panel{padding:18px}.admin-video-row{padding:15px}}

[hidden]{display:none!important}

[hidden]{display:none!important}