:root{--rme-navy: #1a2a3a;--rme-navy-light: rgba(26, 42, 58, .08);--rme-navy-deep: #0f1c28;--rme-sky: #3498db;--rme-sky-hover: #2980b9;--rme-sky-light: rgba(52, 152, 219, .1);--rme-bg: #f4f7f6;--rme-white: #ffffff;--rme-text: #2c3e50;--rme-text-light: #576574;--rme-muted: #7f8c8d;--rme-border: #e2e8f0;--rme-success: #2ecc71;--rme-shadow: 0 4px 12px rgba(26, 42, 58, .04);--rme-shadow-hover: 0 12px 24px rgba(26, 42, 58, .08);--rme-transition: all .3s cubic-bezier(.25, .8, .25, 1)}*{box-sizing:border-box;margin:0;padding:0;font-family:Times New Roman,Georgia,"Noto Serif SC",serif}body{background:var(--rme-bg);color:var(--rme-text);min-height:100vh;line-height:1.6}.rme-navbar{background:var(--rme-white);border-bottom:1px solid var(--rme-border);padding:15px 40px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:100;box-shadow:0 2px 10px #00000005}.rme-logo-area{display:flex;align-items:center;gap:15px}.rme-logo-img{width:48px;height:48px;border-radius:50%;object-fit:cover;border:2px solid var(--rme-sky);box-shadow:0 2px 8px var(--rme-sky-light)}.rme-brand-title{font-weight:800;color:var(--rme-navy);font-size:1.25rem;letter-spacing:.5px}.rme-brand-sub{font-size:.7rem;color:var(--rme-text-light);text-transform:uppercase;letter-spacing:1px}.rme-nav-links{display:flex;gap:20px;align-items:center}.rme-nav-btn{text-decoration:none;background:transparent;border:1px solid var(--rme-navy);color:var(--rme-navy);padding:8px 20px;border-radius:20px;font-size:.85rem;font-weight:700;cursor:pointer;transition:var(--rme-transition)}.rme-nav-btn:hover,.rme-nav-btn.active{background:var(--rme-navy);color:var(--rme-white);box-shadow:0 4px 10px var(--rme-navy-light)}.rme-nav-btn-accent{text-decoration:none;background:var(--rme-sky);border:1px solid var(--rme-sky);color:var(--rme-white);padding:8px 20px;border-radius:20px;font-size:.85rem;font-weight:700;cursor:pointer;transition:var(--rme-transition)}.rme-nav-btn-accent:hover{background:var(--rme-sky-hover);border-color:var(--rme-sky-hover);box-shadow:0 4px 12px var(--rme-sky-light)}.rme-container{max-width:1200px;margin:40px auto;padding:0 20px}.rme-section-header{margin-bottom:30px;border-bottom:2px solid var(--rme-sky-light);padding-bottom:12px}.rme-section-header h2{font-size:1.8rem;color:var(--rme-navy);font-weight:700;display:flex;align-items:center;gap:10px}.rme-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));gap:30px;margin-top:20px}.rme-card{background:var(--rme-white);border-radius:12px;overflow:hidden;box-shadow:var(--rme-shadow);border:1px solid var(--rme-border);transition:var(--rme-transition);display:flex;flex-direction:column;position:relative}.rme-card:hover{transform:translateY(-5px);box-shadow:var(--rme-shadow-hover);border-color:var(--rme-sky)}.rme-card-cover-container{height:200px;width:100%;position:relative;overflow:hidden;background:var(--rme-navy-light)}.rme-card-cover{width:100%;height:100%;object-fit:cover;transition:var(--rme-transition)}.rme-card:hover .rme-card-cover{transform:scale(1.05)}.rme-card-badge{position:absolute;top:15px;right:15px;background:var(--rme-sky);color:var(--rme-white);padding:4px 12px;border-radius:15px;font-size:.75rem;font-weight:700;letter-spacing:.5px;box-shadow:0 2px 6px #0000001a}.rme-card-content{padding:25px;flex:1;display:flex;flex-direction:column}.rme-card-title{font-size:1.2rem;color:var(--rme-navy);margin-bottom:10px;font-weight:700;line-height:1.4}.rme-card-desc{font-size:.9rem;color:var(--rme-text-light);margin-bottom:20px;line-height:1.5;flex:1}.rme-card-footer{border-top:1px solid var(--rme-border);padding-top:15px;display:flex;justify-content:space-between;align-items:center}.rme-card-meta{font-size:.8rem;color:var(--rme-muted);display:flex;align-items:center;gap:5px;font-weight:700}.rme-card-btn{text-decoration:none;background:var(--rme-navy);color:var(--rme-white);padding:8px 18px;border-radius:6px;font-size:.85rem;font-weight:700;transition:var(--rme-transition);cursor:pointer;border:none}.rme-card-btn:hover{background:var(--rme-sky);box-shadow:0 4px 10px var(--rme-sky-light)}.rme-player-layout{display:flex;height:calc(100vh - 80px);width:100vw;overflow:hidden;background:var(--rme-bg)}.rme-left-pane{flex:1;display:flex;flex-direction:column;height:100%;overflow-y:auto;border-right:1px solid var(--rme-border);background:var(--rme-white)}.rme-right-pane{width:45%;height:100%;display:flex;flex-direction:column;background:var(--rme-white);box-shadow:-4px 0 15px #1a2a3a08;z-index:10;transition:var(--rme-transition)}.rme-video-wrapper{width:100%;position:relative;background:var(--rme-navy-deep);aspect-ratio:16 / 9}.rme-video-element{width:100%;height:100%;display:block}.rme-player-controls{position:absolute;bottom:0;left:0;width:100%;background:linear-gradient(transparent,#1a2a3af2);padding:15px 25px;display:flex;flex-direction:column;gap:12px;opacity:0;transition:opacity .3s ease;z-index:20}.rme-video-wrapper:hover .rme-player-controls{opacity:1}.rme-progress-bar-container{width:100%;height:6px;background:#fff3;border-radius:3px;cursor:pointer;position:relative}.rme-progress-filled{height:100%;background:var(--rme-sky);width:0%;border-radius:3px;position:relative}.rme-progress-handle{width:12px;height:12px;background:var(--rme-white);border-radius:50%;position:absolute;top:50%;right:-6px;transform:translateY(-50%);box-shadow:0 0 6px #0000004d}.rme-controls-buttons{display:flex;justify-content:space-between;align-items:center}.rme-controls-left,.rme-controls-right{display:flex;align-items:center;gap:15px}.rme-player-btn{background:transparent;border:none;color:var(--rme-white);cursor:pointer;font-size:1rem;opacity:.85;transition:var(--rme-transition)}.rme-player-btn:hover{opacity:1;color:var(--rme-sky)}.rme-time-display{color:#fffc;font-size:.8rem;font-family:monospace}.rme-speed-select{background:#ffffff26;border:1px solid rgba(255,255,255,.25);color:var(--rme-white);border-radius:4px;padding:2px 6px;font-size:.75rem;outline:none;cursor:pointer}.rme-speed-select option{background:var(--rme-navy);color:var(--rme-white)}.rme-playlist-section{padding:30px;flex:1}.rme-lesson-meta{margin-bottom:25px}.rme-lesson-meta h1{font-size:1.4rem;color:var(--rme-navy);font-weight:700;margin-bottom:8px}.rme-lesson-meta p{font-size:.9rem;color:var(--rme-text-light)}.rme-chapters-list{display:flex;flex-direction:column;gap:10px;margin-top:15px}.rme-chapter-item{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;background:var(--rme-bg);border:1px solid var(--rme-border);border-radius:8px;cursor:pointer;transition:var(--rme-transition)}.rme-chapter-item:hover{border-color:var(--rme-sky);background:var(--rme-white);box-shadow:var(--rme-shadow)}.rme-chapter-item.active{border-color:var(--rme-sky);background:var(--rme-sky-light);color:var(--rme-navy);font-weight:700}.rme-chapter-title{font-size:.95rem;display:flex;align-items:center;gap:10px}.rme-chapter-duration{font-size:.8rem;color:var(--rme-muted)}.rme-redemittel-container{margin-top:35px;background:#f7fafc;border:1px solid var(--rme-border);border-radius:10px;padding:25px}.rme-redemittel-title{font-size:1.1rem;color:var(--rme-navy);font-weight:700;border-bottom:1.5px solid var(--rme-sky-light);padding-bottom:8px;margin-bottom:15px;display:flex;justify-content:space-between;align-items:center}.rme-redemittel-list{display:flex;flex-direction:column;gap:12px}.rme-redemittel-item{background:var(--rme-white);border:1px solid var(--rme-border);border-radius:6px;padding:12px 15px;cursor:pointer;position:relative;transition:var(--rme-transition)}.rme-redemittel-item:hover{border-color:var(--rme-sky);box-shadow:var(--rme-shadow);transform:translate(2px)}.rme-redemittel-de{font-size:.95rem;color:var(--rme-navy);font-weight:700;margin-bottom:4px}.rme-redemittel-zh{font-size:.8rem;color:var(--rme-muted)}.rme-copy-toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%);background:var(--rme-navy);color:var(--rme-white);padding:10px 25px;border-radius:20px;font-size:.85rem;font-weight:700;opacity:0;visibility:hidden;transition:var(--rme-transition);z-index:1000;box-shadow:0 4px 15px #00000026}.rme-copy-toast.show{opacity:1;visibility:visible;bottom:40px}.rme-iframe-header{padding:15px 30px;background:var(--rme-navy);color:var(--rme-white);display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--rme-border)}.rme-iframe-title{font-size:.95rem;font-weight:700;letter-spacing:.5px}.rme-iframe-controls{display:flex;gap:10px}.rme-iframe-container{flex:1;width:100%;border:none;background:var(--rme-bg)}.rme-collapse-btn{background:#ffffff26;border:none;color:var(--rme-white);padding:5px 12px;border-radius:4px;font-size:.8rem;cursor:pointer;transition:var(--rme-transition)}.rme-collapse-btn:hover{background:var(--rme-sky)}.rme-empty-practise{display:flex;flex-direction:column;justify-content:center;align-items:center;height:100%;padding:40px;text-align:center;background:#fdfdfd}.rme-empty-icon{font-size:3rem;margin-bottom:15px;opacity:.7}.rme-empty-practise p{color:var(--rme-muted);max-width:300px;font-size:.9rem;margin-bottom:20px}@media(max-width:1024px){.rme-player-layout{flex-direction:column;height:auto;overflow-y:auto}.rme-right-pane{width:100%;height:600px;border-left:none;border-top:1px solid var(--rme-border)}.rme-left-pane{height:auto;overflow:visible}.rme-navbar{padding:15px 20px}.rme-grid{grid-template-columns:1fr}}