* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            user-select: none;
        }
        body {
            background: #f0f7ff;
            font-family: 'Segoe UI', 'Roboto', 'Noto Sans', system-ui, sans-serif;
            padding: 20px 24px 50px;
            color: #1a2c3e;
        }
        .header-area {
            text-align: center;
            margin-bottom: 28px;
        }
        .school-title {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .school-logo {
            height: 10rem;
            width: auto;
            pointer-events: none;
            user-select: none;
            -webkit-user-drag: none;
        }
        .main-title-text {
            font-size: clamp(1.6rem, 6vw, 2.6rem);
            font-weight: 700;
            background: linear-gradient(135deg, #7bc5f9, #3a8cff, #6bc6ff);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .live-time-box {
            background: linear-gradient(120deg, #cceeff, #a0d0ff);
            display: inline-block;
            padding: 10px 28px;
            border-radius: 60px;
            box-shadow: 0 6px 14px rgba(0, 80, 120, 0.2);
            font-weight: 600;
            font-size: 1.3rem;
            color: #014175;
        }
        .live-time-box span {
            font-family: 'Courier New', monospace;
            background: #ffffffcc;
            padding: 4px 12px;
            border-radius: 40px;
            margin-left: 8px;
        }

        .stats-dashboard {
            margin: 25px 0 20px;
        }
        .stat-card {
            background: white;
            border-radius: 32px;
            padding: 16px 20px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #d9eaff;
        }
        .stat-card h4 {
            font-size: 1rem;
            color: #2c6e9e;
            border-left: 4px solid #ffaa33;
            padding-left: 12px;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .bar-chart {
            margin-top: 8px;
        }
        .month-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
            font-size: 0.75rem;
        }
        .month-name {
            width: 36px;
            font-weight: 500;
            color: #4b6a87;
        }
        .bar-bg {
            flex: 1;
            background: #e2f0ff;
            border-radius: 20px;
            height: 22px;
            overflow: hidden;
        }
        .bar-fill {
            background: linear-gradient(90deg, #7bc5f9, #3a8cff);
            height: 100%;
            width: 0%;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: flex-end;
            padding-right: 6px;
            color: white;
            font-size: 0.7rem;
            font-weight: bold;
        }
        .stat-note {
            font-size: 0.65rem;
            color: #8da3b9;
            margin-top: 10px;
            text-align: center;
        }

        .month-star-section {
            margin: 10px auto 20px;
            max-width: 100%;
            background: #ffffffcc;
            backdrop-filter: blur(4px);
            border-radius: 32px;
            padding: 12px 0 12px 16px;
            box-shadow: 0 6px 14px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(100, 150, 200, 0.3);
        }
        .month-star-title {
            display: flex;
            align-items: baseline;
            gap: 12px;
            padding: 0 12px 8px 0;
            font-weight: 600;
            color: #2c6e9e;
            border-bottom: 2px dashed #bbd9ff;
            margin-right: 16px;
        }
        .month-star-title span:first-child {
            font-size: 1.2rem;
            background: #ffe6b3;
            padding: 4px 14px;
            border-radius: 60px;
        }
        .month-star-scroll {
            display: flex;
            overflow-x: auto;
            gap: 16px;
            padding: 16px 8px 20px 0;
            scrollbar-width: thin;
        }
        .month-star-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .birthday-card {
            background: white;
            min-width: 140px;
            border-radius: 28px;
            padding: 12px 16px;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            border-left: 5px solid #ffaa33;
            flex-shrink: 0;
        }
        .birthday-card:hover {
            transform: translateY(-3px);
            background: #fffef7;
        }
        .card-name {
            font-weight: 800;
            font-size: 1.1rem;
            color: #1f6392;
        }
        .card-date {
            font-family: monospace;
            font-size: 0.75rem;
            background: #eff5fc;
            display: inline-block;
            padding: 2px 10px;
            border-radius: 40px;
            margin-top: 6px;
        }
        .birthday-banner {
            background: #fff9e8;
            border-left: 8px solid #ffaa33;
            border-radius: 28px;
            padding: 16px 24px;
            margin: 25px 0 30px;
        }
        .birthday-banner h3 {
            font-size: 1.7rem;
            color: #e67e22;
        }
        .birthday-list {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 14px;
        }
        .birthday-person-card {
            background: #ffffffdb;
            border-radius: 50px;
            padding: 8px 24px 8px 20px;
            display: inline-flex;
            align-items: center;
            gap: 18px;
            box-shadow: 0 2px 6px rgba(0,0,0,0.1);
        }
        .interact-btn {
            background: #ffaa33;
            border: none;
            padding: 6px 18px;
            border-radius: 50px;
            font-weight: bold;
            cursor: pointer;
        }
        
        .message-board {
            background: white;
            border-radius: 32px;
            padding: 20px;
            margin: 25px 0;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #d9eaff;
        }
        .message-board h4 {
            font-size: 1.2rem;
            color: #2c6e9e;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .message-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 20px;
            background: #f9fafc;
            padding: 16px;
            border-radius: 24px;
        }
        .message-form input, .message-form textarea {
            border: 1px solid #cce0f0;
            border-radius: 40px;
            padding: 10px 16px;
            font-family: inherit;
            font-size: 0.9rem;
            background: white;
        }
        .message-form textarea {
            border-radius: 20px;
            resize: vertical;
        }
        .message-form button {
            background: #3a8cff;
            color: white;
            border: none;
            padding: 10px;
            border-radius: 40px;
            font-weight: bold;
            cursor: pointer;
            transition: 0.1s;
        }
        .message-form button:hover {
            background: #2c6e9e;
        }
        .message-list {
            max-height: 300px;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .message-item {
            background: #f5faff;
            padding: 12px 16px;
            border-radius: 24px;
            border-left: 4px solid #ffaa33;
        }
        .message-item strong {
            color: #1f6392;
        }
        .message-time {
            font-size: 0.7rem;
            color: #7d9bc3;
            margin-left: 10px;
        }
        
        .students-grid {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 10px;
        }
        .student-row {
            background: white;
            border-radius: 28px;
            padding: 14px 20px;
            display: grid;
            grid-template-columns: 1.2fr 0.7fr 0.9fr 1.4fr 2fr;
            align-items: center;
            gap: 12px;
            border: 1px solid #e2f0ff;
        }
        .student-name { font-weight: 700; color: #1f6392; }
        .student-gender {
            background: #eef4fc;
            padding: 4px 12px;
            border-radius: 40px;
            width: fit-content;
        }
        .student-age { font-weight: 600; color: #2c6e9e; }
        .student-birth {
            font-family: monospace;
            color: #4b6a87;
            background: #f5f9ff;
            padding: 4px 10px;
            border-radius: 30px;
            width: fit-content;
        }
        .countdown-timer {
            font-family: monospace;
            font-weight: 600;
            color: #2c7da0;
            background: #e9f3fc;
            padding: 6px 12px;
            border-radius: 32px;
            text-align: center;
        }
        @media (max-width: 780px) {
            .student-row { grid-template-columns: 1fr; gap: 8px; }
        }
        footer {
            text-align: center;
            margin-top: 40px;
            font-size: 0.7rem;
            color: #7d9bc3;
        }