<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">.welcome-screen {
    position: absolute !important;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    max-width: 800px;
    max-height: 600px;
    background: linear-gradient(135deg, #2c3e50, #4a69bd);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0.9;
    transition: opacity 0.8s ease;
    border-radius: 30px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    /* animation: backgroundShift 15s infinite alternate; */
    padding: 20px;
    position: relative;
}

/* è¤ç«è™«ç‰¹æ•ˆ */
.welcome-screen::before {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    background: rgba(255, 255, 150, 0.8);
    border-radius: 50%;
    filter: blur(3px);
    animation: firefly 12s linear infinite;
    box-shadow: 0 0 15px rgba(255, 255, 150, 0.6),
                0 0 30px rgba(255, 255, 150, 0.4),
                0 0 45px rgba(255, 255, 150, 0.2);
}



@keyframes firefly {
    0% {
        transform: translate(0, -50%) rotate(0deg);
        left: 2px;
        top: 2px;
        opacity: 1;
    }
    2% {
        transform: translate(-3%, -47%) rotate(3deg);
        left: 5%;
        top: 5%;
        opacity: 0.98;
    }
    3% {
        transform: translate(-5%, -45%) rotate(5deg);
        left: 8%;
        top: 8%;
        opacity: 0.65;
    }
    5% {
        transform: translate(-10%, -42%) rotate(8deg);
        left: 12%;
        top: 9%;
        opacity: 0.92;
    }
    7% {
        transform: translate(-15%, -40%) rotate(10deg);
        left: 15%;
        top: 10%;
        opacity: 0.9;
    }
    9% {
        transform: translate(-18%, -38%) rotate(12deg);
        left: 18%;
        top: 11%;
        opacity: 0.77;
    }
    11% {
        transform: translate(-20%, -35%) rotate(15deg);
        left: 20%;
        top: 12%;
        opacity: 0.05;
    }
    13% {
        transform: translate(-22%, -33%) rotate(18deg);
        left: 22%;
        top: 13%;
        opacity: 0.83;
    }
    15% {
        transform: translate(-25%, -30%) rotate(25deg);
        left: 25%;
        top: 15%;
        opacity: 0.8;
    }
    17% {
        transform: translate(-30%, -22%) rotate(32deg);
        left: 30%;
        top: 12%;
        opacity: 0.25;
    }
    20% {
        transform: translate(-35%, -15%) rotate(40deg);
        left: 35%;
        top: 10%;
        opacity: 0.2;
    }
    22% {
        transform: translate(-40%, -8%) rotate(42deg);
        left: 40%;
        top: 8%;
        opacity: 0.15;
    }
    25% {
        transform: translate(-50%, 0) rotate(45deg);
        left: calc(100% - 2px);
        top: 2px;
        opacity: 0.6;
    }
    27% {
        transform: translate(-48%, 5%) rotate(38deg);
        left: 55%;
        top: 10%;
        opacity: 0.75;
    }
    30% {
        transform: translate(-45%, 10%) rotate(30deg);
        left: 60%;
        top: 15%;
        opacity: 0.8;
    }
    32% {
        transform: translate(-42%, 15%) rotate(25deg);
        left: 68%;
        top: 20%;
        opacity: 0.15;
    }
    35% {
        transform: translate(-40%, 20%) rotate(-20deg);
        left: 75%;
        top: 25%;
        opacity: 0.9;
    }
    37% {
        transform: translate(-35%, 25%) rotate(-25deg);
        left: 70%;
        top: 30%;
        opacity: 0.85;
    }
    40% {
        transform: translate(-25%, 30%) rotate(-35deg);
        left: 65%;
        top: 35%;
        opacity: 0.2;
    }
    42% {
        transform: translate(-18%, 35%) rotate(-30deg);
        left: 72%;
        top: 40%;
        opacity: 0.85;
    }
    45% {
        transform: translate(-10%, 40%) rotate(-25deg);
        left: 80%;
        top: 45%;
        opacity: 0.9;
    }
    47% {
        transform: translate(-5%, 45%) rotate(-30deg);
        left: 85%;
        top: 55%;
        opacity: 0.95;
    }
    50% {
        transform: translate(0, 50%) rotate(-40deg);
        left: calc(100% - 12px);
        top: calc(100% - 12px);
        opacity: 1;
    }
    52% {
        transform: translate(8%, 45%) rotate(-35deg);
        left: 88%;
        top: 60%;
        opacity: 0.95;
    }
    55% {
        transform: translate(15%, 40%) rotate(-25deg);
        left: 85%;
        top: 65%;
        opacity: 0.1;
    }
    57% {
        transform: translate(18%, 37%) rotate(-15deg);
        left: 75%;
        top: 68%;
        opacity: 0.85;
    }
    60% {
        transform: translate(20%, 35%) rotate(-10deg);
        left: 70%;
        top: 70%;
        opacity: 0.8;
    }
    62% {
        transform: translate(25%, 32%) rotate(25deg);
        left: 60%;
        top: 72%;
        opacity: 0.95;
    }
    65% {
        transform: translate(30%, 30%) rotate(55deg);
        left: 50%;
        top: 75%;
        opacity: 0.7;
    }
    67% {
        transform: translate(35%, 22%) rotate(60deg);
        left: 40%;
        top: 78%;
        opacity: 0.75;
    }
    70% {
        transform: translate(40%, 15%) rotate(70deg);
        left: 35%;
        top: 80%;
        opacity: 0.8;
    }
    71% {
        transform: translate(42%, 10%) rotate(68deg);
        left: 20%;
        top: 82%;
        opacity: 0.5;
    }
    72% {
        transform: translate(45%, 5%) rotate(65deg);
        left: 5%;
        top: 85%;
        opacity: 0.95;
    }
    73% {
        transform: translate(47%, 0) rotate(70deg);
        left: 3%;
        top: 88%;
        opacity: 0.98;
    }
    75% {
        transform: translate(50%, 0) rotate(75deg);
        left: 2px;
        top: calc(100% - 12px);
        opacity: 1;
    }
    76% {
        transform: translate(48%, -4%) rotate(72deg);
        left: 5%;
        top: 80%;
        opacity: 0.65;
    }
    77% {
        transform: translate(45%, -8%) rotate(68deg);
        left: 8%;
        top: 75%;
        opacity: 0.95;
    }
    78% {
        transform: translate(42%, -12%) rotate(65deg);
        left: 9%;
        top: 70%;
        opacity: 1;
    }
    80% {
        transform: translate(40%, -15%) rotate(60deg);
        left: 10%;
        top: 70%;
        opacity: 0.9;
    }
    81% {
        transform: translate(38%, -18%) rotate(30deg);
        left: 11%;
        top: 65%;
        opacity: 0.5;
    }
    83% {
        transform: translate(35%, -20%) rotate(10deg);
        left: 12%;
        top: 60%;
        opacity: 0.85;
    }
    84% {
        transform: translate(30%, -22%) rotate(-20deg);
        left: 13%;
        top: 55%;
        opacity: 0.7;
    }
    85% {
        transform: translate(25%, -25%) rotate(-40deg);
        left: 15%;
        top: 50%;
        opacity: 0.8;
    }
    86% {
        transform: translate(22%, -27%) rotate(-35deg);
        left: 12%;
        top: 45%;
        opacity: 0.4;
    }
    88% {
        transform: translate(20%, -30%) rotate(-30deg);
        left: 10%;
        top: 40%;
        opacity: 0.85;
    }
    89% {
        transform: translate(18%, -32%) rotate(-25deg);
        left: 9%;
        top: 35%;
        opacity: 0.87;
    }
    90% {
        transform: translate(15%, -35%) rotate(-20deg);
        left: 8%;
        top: 30%;
        opacity: 0.3;
    }
    91% {
        transform: translate(12%, -37%) rotate(-18deg);
        left: 7%;
        top: 25%;
        opacity: 0.88;
    }
    93% {
        transform: translate(8%, -40%) rotate(-15deg);
        left: 6%;
        top: 20%;
        opacity: 0.85;
    }
    94% {
        transform: translate(6%, -42%) rotate(-12deg);
        left: 5%;
        top: 18%;
        opacity: 0.82;
    }
    95% {
        transform: translate(5%, -45%) rotate(-10deg);
        left: 4%;
        top: 15%;
        opacity: 0.8;
    }
    96% {
        transform: translate(3%, -46%) rotate(-7deg);
        left: 3%;
        top: 12%;
        opacity: 0.2;
    }
}



@media (max-width: 480px) {
    .welcome-screen {
        max-width: 85%;
        max-height: 85vh;
        padding: 10px;
    }
    .button, button, select, .start-button {
        font-size: 0.85rem;
        padding: 0.5rem 1rem;
        min-width: 20px;
        /*ä¸æ¢è¡Œ*/
        white-space: nowrap;
        overflow: hidden;
    }
    h1.welcome-title {
        font-size: 2.2rem !important;
        margin-bottom: 2.5rem;
    }
    .controls_left, .controls_right {
        display: flex;
        justify-content: center;
    }
    button.start-button {
        padding: 0.5rem 1.4rem;
        font-size: 1rem;
    }
}

.welcome-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.welcome-title {
    font-size: 4rem;
    color: #ffd700;
    text-shadow: 0 2px 10px rgba(255, 215, 0, 0.5);
    margin-bottom: 6rem;
    animation: titleGlow 3s infinite;
    position: relative;
    z-index: 2;
    text-align: center;
}

.start-button {
    padding: 1rem 2rem;
    font-size: 1.5rem;
    color: #2c3e50;
    background: #ffd700;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2), 0 0 20px rgba(255, 215, 0, 0.4);
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
    overflow: hidden;
}

.start-button:hover {
    transform: translateY(-5px) scale(1.05);
    background: #ffec8b;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3), 0 0 30px rgba(255, 215, 0, 0.6);
}

.start-button::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(30deg);
    transition: all 0.5s ease;
    opacity: 0;
}

.start-button:hover::after {
    opacity: 1;
    transform: rotate(30deg) translate(10%, 10%);
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes backgroundShift {
    0% { background: linear-gradient(135deg, #22345a, #395a7d); }
    20% { background: linear-gradient(135deg, #2a406b, #4a6b8f); }
    40% { background: linear-gradient(135deg, #35547a, #5a7b9c); }
    60% { background: linear-gradient(135deg, #2a406b, #4a6b8f); }
    80% { background: linear-gradient(135deg, #22345a, #395a7d); }
    100% { background: linear-gradient(135deg, #22345a, #395a7d); }
}

@keyframes titleGlow {
    0% { text-shadow: 0 2px 10px rgba(255, 215, 0, 0.5); transform: scale(1); }
    50% { text-shadow: 0 5px 20px rgba(255, 215, 0, 0.8); transform: scale(1.05); }
    100% { text-shadow: 0 2px 10px rgba(255, 215, 0, 0.5); transform: scale(1); }
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg) scale(1); }
    25% { transform: translateY(-15px) rotate(5deg) scale(1.1); }
    50% { transform: translateY(0) rotate(-5deg) scale(1); }
    75% { transform: translateY(15px) rotate(5deg) scale(0.9); }
    100% { transform: translateY(0) rotate(0deg) scale(1); }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.2; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1); }
}



/* æ·»åŠ&nbsp;æ˜Ÿæ˜Ÿè£…é¥° */
.star {
    position: absolute;
    background-color: #fff;
    border-radius: 50%;
    animation: twinkle 3s infinite;
    z-index: 1;
}

.star:nth-child(1) { top: 15%; left: 20%; width: 4px; height: 4px; animation-delay: 0s; }
.star:nth-child(2) { top: 25%; left: 80%; width: 6px; height: 6px; animation-delay: 0.5s; }
.star:nth-child(3) { top: 60%; left: 15%; width: 5px; height: 5px; animation-delay: 1s; }
.star:nth-child(4) { top: 75%; left: 75%; width: 4px; height: 4px; animation-delay: 1.5s; }
.star:nth-child(5) { top: 35%; left: 50%; width: 6px; height: 6px; animation-delay: 2s; }
.star:nth-child(6) { top: 85%; left: 30%; width: 5px; height: 5px; animation-delay: 2.5s; }
.star:nth-child(7) { top: 10%; left: 60%; width: 4px; height: 4px; animation-delay: 1.2s; }
.star:nth-child(8) { top: 50%; left: 85%; width: 5px; height: 5px; animation-delay: 0.7s; }

/* æ·»åŠ&nbsp;æµ®åŠ¨å›¾æ&nbsp;‡ */
.floating-icon {
    position: absolute;
    width: 20px;
    height: 20px;
    font-size: 28px;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0.9;
    z-index: 1001;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 0 3px rgba(255, 215, 0, 0.5));
    transition: all 0.3s ease;
}

.floating-icon:hover {
    transform: scale(1.2) rotate(20deg);
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.8));
}

.floating-icon:nth-child(1) {
    top: 20%;
    left: 18%;
    animation-delay: 0.5s;
}

.floating-icon:nth-child(1)::before {
    content: 'ðŸ¼';
}

.floating-icon:nth-child(2) {
    top: 71%;
    left: 80%;
    animation-delay: 1s;
}

.floating-icon:nth-child(2)::before {
    content: 'ðŸ°';
}

.floating-icon:nth-child(3) {
    top: 25%;
    left: 65%;
    animation-delay: 1.5s;
}

.floating-icon:nth-child(3)::before {
    content: 'ðŸ¦Š';
}

.floating-icon:nth-child(4) {
    top: 55%;
    left: 6%;
    animation-delay: 2s;
}

.floating-icon:nth-child(4)::before {
    content: 'ðŸ±';
}

.floating-icon:nth-child(5) {
    top: 10%;
    left: 90%;
    animation-delay: 1s;
}

.floating-icon:nth-child(5)::before {
    content: 'ðŸ¦„';
}

.floating-icon:nth-child(6) {
    top: 90%;
    left: 7%;
    animation-delay: 3s;
}

.floating-icon:nth-child(6)::before {
    content: 'ðŸ¸';
}
</pre></body></html>