@keyframes mcCoverShimmer{0%,to{opacity:.5}50%{opacity:.85}}:root{--mc-bg:#0a0f1c;--mc-panel-bg:rgba(10, 14, 22, 0.92);--mc-panel-border:rgba(0, 255, 209, 0.2);--mc-panel-glow:0 0 50px rgba(0, 255, 209, 0.1);--mc-level-border:rgba(255, 255, 255, 0.05);--mc-learning-bg:rgba(255, 159, 28, 0.05);--mc-learning-accent:#ff9f1c;--mc-locked-bg:rgba(0, 0, 0, 0.35);--mc-locked-border:rgba(0, 255, 209, 0.12);--mc-accent:#00ffd1;--mc-accent-2:#00c6ff;--mc-grid-line:rgba(0, 255, 209, 0.05);--mc-muted:#94a3b8;--mc-subtle:#cbd5e1}*{box-sizing:border-box}.mc-page{margin:0;min-height:100vh;font-family:"Microsoft YaHei","PingFang SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#fff;background-color:var(--mc-bg);padding:20px clamp(12px,2vw,28px) 40px;position:relative;overflow-x:hidden}.mc-page::before,.mc-shell-inner::before{content:"";top:0;left:0;pointer-events:none}.mc-page::before{position:fixed;width:100%;height:100%;background-image:linear-gradient(var(--mc-grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--mc-grid-line) 1px,transparent 1px);background-size:30px 30px;z-index:0}.mc-shell{position:relative;z-index:1;width:100%;max-width:min(1680px,97vw);margin:0 auto}.mc-shell-frame,.mc-shell-inner{position:relative;border-radius:12px}.mc-shell-frame{padding:0;background:0 0;box-shadow:none}.mc-shell-inner{background:var(--mc-panel-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--mc-panel-border);box-shadow:var(--mc-panel-glow);overflow:hidden;padding:clamp(22px,3vw,36px) clamp(20px,3vw,40px) clamp(28px,3.5vh,40px)}.mc-shell-inner::before{position:absolute;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(0,255,209,.35),transparent)}.mc-header{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid rgba(0,255,209,.12);position:relative;z-index:1}.mc-title{margin:0;font-size:clamp(1.35rem,2.2vw,1.5rem);font-weight:700;letter-spacing:.02em;background:linear-gradient(90deg,var(--mc-accent),var(--mc-accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.mc-count,.mc-sub{color:var(--mc-muted)}.mc-count{font-weight:600;font-size:.92em;-webkit-text-fill-color:initial;background:0 0}.mc-sub{margin:8px 0 0;font-size:.95rem;max-width:36rem;line-height:1.55}.mc-sub strong{color:var(--mc-subtle);font-weight:600}.mc-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.mc-link-btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 16px;border-radius:8px;font-size:.9rem;font-weight:600;text-decoration:none;cursor:pointer;border:0;font-family:inherit;transition:all .3s ease}.mc-link-btn:not(.mc-outline){background:linear-gradient(90deg,var(--mc-accent),var(--mc-accent-2));color:#0a0f1c;border:0;font-weight:700}.mc-link-btn:not(.mc-outline):hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(0,255,209,.2)}.mc-link-btn.mc-outline{background:0 0;border:1px solid rgba(0,255,209,.2);color:var(--mc-accent)}.mc-link-btn.mc-outline:hover{background:rgba(0,255,209,.1);border-color:rgba(0,255,209,.35);color:#e2e8f0}.mc-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:minmax(228px,auto);gap:20px;align-items:stretch;position:relative;z-index:1}.mc-card-cell{display:flex;justify-content:center;align-items:stretch;min-width:0}.mc-card-cell>.mc-card-link,.mc-card-cell>.mc-card-slot{width:100%;max-width:100%;align-self:stretch}.mc-card-cell--reserved{border-radius:12px;border:1px dashed rgba(0,255,209,.12);background:rgba(0,0,0,.28);min-height:228px;box-sizing:border-box}.mc-card-link{text-decoration:none;color:inherit;display:flex;flex-direction:column;height:100%;min-height:228px;border-radius:12px;outline:0;cursor:pointer;position:relative;z-index:2}.mc-card-cell .mc-card-link:focus-visible .mc-card{box-shadow:0 0 0 2px rgba(0,255,209,.35);border-color:var(--mc-accent)}.mc-card{position:relative;border-radius:12px;overflow:hidden;background:var(--mc-learning-bg);border:1px solid var(--mc-level-border);border-left:4px solid var(--mc-learning-accent);border-right:4px solid var(--mc-learning-accent);box-shadow:none;transition:all .3s ease;min-height:228px;flex:1 1 auto;display:flex;flex-direction:column}.mc-card-link>.mc-card,.mc-card-slot--placeholder>.mc-card{flex:1 1 auto;width:100%}.mc-card-link:hover .mc-card{transform:translateY(-3px);border-left-color:#ffb347;border-right-color:#ffb347;background:rgba(255,159,28,.09);box-shadow:0 8px 24px rgba(255,159,28,.12)}.mc-card-cell:first-child .mc-card{border-left-color:var(--mc-learning-accent);border-right-color:var(--mc-learning-accent)}.mc-card-slot{display:block;border-radius:12px}.mc-card-slot--placeholder{cursor:default;pointer-events:none;user-select:none;display:flex;flex-direction:column;height:100%;min-height:228px}.mc-card--placeholder{opacity:1;background:var(--mc-locked-bg)!important;border:1px solid var(--mc-locked-border)!important;border-left:1px solid var(--mc-locked-border)!important;border-right:1px solid var(--mc-locked-border)!important}.mc-card--placeholder:hover{transform:none;box-shadow:none;background:rgba(0,0,0,.38)!important}.mc-card--placeholder .mc-cover{background:linear-gradient(180deg,rgba(0,0,0,.45)0,rgba(0,0,0,.35) 100%);border-bottom:1px solid var(--mc-locked-border)}.mc-card--placeholder .mc-cover::before{animation-duration:8s;opacity:.55}.mc-card--placeholder .mc-cover-icon{background:linear-gradient(135deg,rgba(0,255,209,.25),rgba(0,198,255,.25));box-shadow:none}.mc-card--placeholder .mc-cover-badge{background:rgba(71,85,105,.95);color:#e2e8f0}.mc-card--placeholder .mc-tag{background:rgba(51,65,85,.9);color:var(--mc-subtle)}.mc-card--placeholder .mc-card-title{color:var(--mc-subtle)}.mc-card--placeholder .mc-progress-pct{background:0 0;-webkit-text-fill-color:unset;color:var(--mc-muted);text-shadow:none}.mc-card--placeholder .mc-progress-fill{width:0%!important;opacity:.25;box-shadow:none}.mc-card-body{position:relative;z-index:1;display:flex;flex-direction:column;flex:1;min-height:0}.mc-cover{position:relative;height:112px;flex-shrink:0;overflow:hidden;background:linear-gradient(180deg,rgba(0,0,0,.42)0,rgba(0,0,0,.32) 100%);border-bottom:1px solid rgba(0,255,209,.1)}.mc-cover-grid,.mc-cover::before{position:absolute;inset:0;pointer-events:none}.mc-cover::before{content:"";background:radial-gradient(circle at 35% 30%,rgba(0,255,209,.15),transparent 50%),radial-gradient(circle at 80% 70%,rgba(0,198,255,.1),transparent 45%);animation:mcCoverShimmer 6s ease-in-out infinite}.mc-cover-grid{opacity:.35;background-image:linear-gradient(rgba(0,255,209,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(0,255,209,.08) 1px,transparent 1px);background-size:20px 20px}.mc-cover-icon{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:linear-gradient(135deg,var(--mc-accent),var(--mc-accent-2));color:#0a0f1c;z-index:1}.mc-cover-badge{position:absolute;top:8px;right:8px;z-index:2;padding:4px 8px;border-radius:999px;font-size:.62rem;font-weight:700;letter-spacing:.04em;color:#0a0f1c;background:linear-gradient(90deg,var(--mc-accent),var(--mc-accent-2))}.mc-card-main{padding:14px 14px 16px;flex:1;display:flex;flex-direction:column;min-height:0}.mc-tag-row{display:flex;align-items:center;flex-wrap:wrap;gap:6px 8px;margin-bottom:6px}.mc-tag{display:inline-block;padding:3px 8px;border-radius:999px;font-size:.68rem;font-weight:700;color:#0a0f1c;background:linear-gradient(90deg,var(--mc-accent),var(--mc-accent-2));letter-spacing:.03em}.mc-card-title{margin:0;font-size:.95rem;font-weight:700;color:#fff;letter-spacing:.02em;line-height:1.35}.mc-card-desc{margin:6px 0 0;font-size:.73rem;color:var(--mc-muted);line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.mc-progress-detail{margin-top:6px!important;font-size:.68rem!important;-webkit-line-clamp:1;line-clamp:1}.mc-progress-block{margin-top:auto;padding-top:10px}.mc-progress-label{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:5px;font-size:.68rem;color:var(--mc-muted)}.mc-progress-pct{font-weight:800;font-size:.78rem;background:linear-gradient(90deg,var(--mc-accent),var(--mc-accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.mc-progress-bar{position:relative;z-index:1;height:12px;border-radius:8px;background:rgba(0,0,0,.35);border:1px solid rgba(0,255,209,.12);overflow:hidden}.mc-progress-fill{height:100%;width:0%;border-radius:7px;background:linear-gradient(90deg,var(--mc-accent),var(--mc-accent-2));box-shadow:0 0 14px rgba(0,255,209,.25);transition:width .65s cubic-bezier(.22,1,.36,1)}.mc-hint{margin-top:28px;text-align:center;font-size:.82rem;color:var(--mc-muted);position:relative;z-index:1}.mc-hint kbd{padding:2px 8px;border-radius:6px;background:rgba(30,41,59,.5);border:1px solid rgba(0,255,209,.2);color:var(--mc-accent);font-size:.8em}@media (max-width:768px){.mc-grid{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:minmax(228px,auto)}}@media (max-width:560px){.mc-grid{grid-template-columns:1fr;grid-auto-rows:auto}.mc-card-cell--reserved{min-height:120px}}@media (max-width:520px){.mc-header{flex-direction:column;align-items:flex-start}.mc-actions{width:100%}.mc-link-btn{flex:1;min-width:0}}