.panel{display:block!important;background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(248,251,255,.94))!important;border:1px solid #e2eaf2!important;border-radius:22px!important;padding:28px 28px 24px!important;box-shadow:0 12px 28px rgba(148,163,184,.1)!important;position:relative!important;overflow:hidden!important}
.panel::before{content:""!important;position:absolute!important;inset:0 0 auto 0!important;height:5px!important;pointer-events:none!important;background:linear-gradient(90deg,#64b5f6 0%,#81c784 35%,#ffb74d 68%,#e57373 100%)!important}
.pc-card{background:#fff;border:2px solid #e2eaf2;border-radius:16px;padding:22px;margin:18px 0;position:relative;overflow:hidden}
.pc-num{position:absolute;top:14px;right:16px;font-size:11px;font-weight:800;color:#90a4ae}
.pc-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:14px 0}
@media(max-width:700px){.pc-pair{grid-template-columns:1fr}}
.pc-pseudo{background:#2d2b55;border-radius:12px;padding:16px;font-family:"Consolas","Monaco",monospace;font-size:13px;color:#e0d7ff;line-height:1.8;border:2px solid #4b3f8f;position:relative}
.pc-pseudo::before{content:"Pseudocode";position:absolute;top:-10px;left:12px;background:#7c6fdb;color:#fff;padding:2px 10px;border-radius:6px;font-size:10px;font-weight:800}
.pc-pseudo .kw{color:#ffd580;font-weight:700}
.pc-pseudo .cm{color:#8a80b0;font-style:italic}
.pc-pseudo .indent{padding-left:20px}
.pc-pseudo .indent2{padding-left:40px}
.pc-ccode{position:relative}
.pc-ccode::before{content:"C";position:absolute;top:-10px;left:12px;background:#4a8cc7;color:#fff;padding:2px 10px;border-radius:6px;font-size:10px;font-weight:800;z-index:1}
.pc-ccode pre.c-code{margin:0;border-radius:12px;padding-top:22px}
.reveal-btn{display:inline-block;padding:7px 16px;background:#eef3f8;border:1px solid #d5e0ea;border-radius:8px;font-size:12px;font-weight:700;color:#3a5a7c;cursor:pointer;transition:.2s;font-family:inherit;margin:4px}
.reveal-btn:hover{background:#e3eefa;border-color:#90caf9}
.pc-answer{display:none;margin:10px 0}
.pc-answer.show{display:block}
.diff-table{width:100%;border-collapse:collapse;font-size:13px;margin:12px 0}
.diff-table th{background:#2d2b55;color:#e0d7ff;padding:10px 14px;text-align:left;font-weight:700}
.diff-table th:last-child{background:#1e1e2e;color:#cdd6f4}
.diff-table td{padding:8px 14px;border:1px solid #e2eaf2;vertical-align:top;font-family:"Consolas",monospace;font-size:12px}
.diff-table tr:hover td{background:#f8fbff}