* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif; }

body { min-height: 100vh; color: #1a365d; overflow-x: hidden; }

.bg-animation {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: linear-gradient(-45deg, #f0f8ff, #e0f2fe, #bae6fd, #ffffff);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    z-index: -1;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.glass-box {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.9);
    padding: 20px;
}

.container { max-width: 1300px; margin: 0 auto; padding: 25px; }

.top-bar { display: flex; align-items: center; margin-bottom: 20px; }

.back-btn {
    text-decoration: none;
    background: linear-gradient(135deg, #e0f2fe, #bfdbfe);
    color: #1d4ed8;
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 600;
    margin-right: 20px;
    border: 1px solid #93c5fd;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.25s;
}

.back-btn:hover {
    background: #3b82f6;
    color: #fff;
    transform: translateX(-4px);
}

.top-bar h1 {
    font-size: 23px;
    color: #0f4c81;
    display: flex;
    align-items: center;
    gap: 8px;
}

.experiment-area {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.control-panel {
    width: 400px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.control-panel h2 {
    color: #0f4c81;
    font-size: 17px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hint { color: #64748b; font-size: 13px; }

.input-box {
    background: #f8fafc;
    padding: 14px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

.input-box label {
    font-size: 14px;
    font-weight: 600;
    color: #334155;
    display: block;
    margin-bottom: 8px;
}

.input-wrapper {
    position: relative;
    margin-bottom: 10px;
}

.input-wrapper input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid #cbd5e1;
    border-radius: 8px;
    font-size: 15px;
    font-family: Consolas, monospace;
    background: #fff;
    transition: all 0.25s;
}

.input-wrapper input:focus {
    border-color: #8b5cf6;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
    outline: none;
}

.encode-btn {
    width: 100%;
    padding: 11px;
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.25s;
}

.encode-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 20px rgba(139, 92, 246, 0.35);
}

.slider-box {
    background: rgba(241, 245, 249, 0.9);
    border-radius: 10px;
    padding: 14px;
}

.slider-header {
    font-size: 14px;
    font-weight: 600;
    color: #475569;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #64748b;
    margin-top: 6px;
}

.current-val {
    font-weight: 700;
    color: #8b5cf6;
    font-size: 13px;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background: linear-gradient(90deg, #c4b5fd, #8b5cf6);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: #fff;
    border: 3px solid #8b5cf6;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(139, 92, 246, 0.3);
}

.select-box {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #cbd5e1;
    border-radius: 8px;
    font-size: 14px;
    background: white;
    color: #334155;
    outline: none;
}

.select-box:focus { border-color: #8b5cf6; }

.mapping-table, .info-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 12px;
}

.mapping-table h3, .info-box h3 {
    font-size: 14px;
    color: #0f4c81;
    margin-bottom: 8px;
}

.mapping-table p, .info-box p {
    font-size: 13px;
    color: #475569;
    margin-bottom: 4px;
}

.mini-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 8px;
}

.theory-box {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(139, 92, 246, 0.1));
    border-left: 4px solid #8b5cf6;
    border-radius: 0 10px 10px 0;
    padding: 12px;
}

.theory-box h3 {
    font-size: 14px;
    color: #6d28d9;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.theory-box .formula {
    font-family: 'Times New Roman', serif;
    font-size: 16px;
    font-style: italic;
    text-align: center;
    font-weight: 600;
    color: #7c3aed;
    background: rgba(255,255,255,0.7);
    padding: 8px;
    border-radius: 6px;
    margin: 8px 0;
}

.theory-box p {
    font-size: 12px;
    color: #5b21b6;
    line-height: 1.6;
    margin-bottom: 4px;
}

.contact-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(59, 130, 246, 0.1));
    border: 1px dashed #3b82f6;
    border-radius: 10px;
    padding: 12px;
    margin-top: auto;
}

.contact-box h3 {
    font-size: 14px;
    color: #1d4ed8;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.contact-box p {
    font-size: 12px;
    color: #475569;
    margin-bottom: 8px;
}

.contact-info {
    background: rgba(255,255,255,0.8);
    border-radius: 8px;
    padding: 10px;
}

.contact-info p {
    font-size: 13px;
    color: #0f4c81;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.contact-info p:last-child {
    color: #dc2626;
    font-weight: 700;
    margin-bottom: 0;
}

.chart-panel {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e2e8f0;
}

.chart-header h2 {
    color: #0f4c81;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.signal-status {
    background: rgba(139, 92, 246, 0.08);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    color: #4c1d95;
}

.signal-status .highlight {
    color: #8b5cf6;
    font-weight: 700;
}

.charts-container {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.chart-section {
    background: #fff;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    padding: 12px;
}

.chart-title {
    font-size: 13px;
    font-weight: 600;
    color: #475569;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.dot.blue { background: #3b82f6; }
.dot.green { background: #22c55e; }
.dot.orange { background: #f59e0b; }
.dot.purple { background: #8b5cf6; }
.dot.red { background: #ef4444; }

#chartConstellation {
    background: rgba(30, 41, 59, 0.95);
    border-radius: 8px;
}

@media (max-width: 1000px) {
    .experiment-area { flex-direction: column; }
    .control-panel { width: 100%; }
}