* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    overscroll-behavior: none;
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.3),
                    0 0 40px rgba(255, 255, 255, 0.2),
                    0 0 60px rgba(255, 255, 255, 0.1);
    }
    50% {
        box-shadow: 0 0 30px rgba(255, 255, 255, 0.4),
                    0 0 60px rgba(255, 255, 255, 0.3),
                    0 0 90px rgba(255, 255, 255, 0.2);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.gradient-bg {
    background: linear-gradient(-45deg,
        #667eea 0%,
        #764ba2 25%,
        #f093fb 50%,
        #4facfe 75%,
        #00f2fe 100%);
    background-size: 400% 400%;
    animation: gradient 20s ease infinite;
    position: relative;
    overflow-x: hidden;
}

.gradient-bg::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 30s ease-in-out infinite;
    opacity: 0.3;
    pointer-events: none;
    z-index: -1;
}

.tool-card {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent);
    transition: left 0.5s;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3),
                0 0 30px rgba(255, 255, 255, 0.1);
}

.glass-effect {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.time-display {
    background: linear-gradient(135deg,
        rgba(255, 255, 255, 0.15) 0%,
        rgba(255, 255, 255, 0.05) 100%);
    backdrop-filter: blur(30px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: pulse-glow 3s ease-in-out infinite;
}

.digit {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 0 20px rgba(255, 200, 255, 0.4),
                 0 0 40px rgba(180, 150, 255, 0.3),
                 0 2px 8px rgba(0, 0, 0, 0.2);
}

.icon-wrapper {
    transition: all 0.3s ease;
}

.tool-card:hover .icon-wrapper {
    transform: scale(1.1) rotate(5deg);
}

@keyframes title-glow {
    0%, 100% {
        text-shadow: 0 0 15px rgba(255, 200, 255, 0.5),
                     0 0 30px rgba(200, 150, 255, 0.3),
                     0 0 45px rgba(150, 100, 255, 0.2),
                     0 3px 10px rgba(0, 0, 0, 0.3);
    }
    50% {
        text-shadow: 0 0 25px rgba(255, 220, 255, 0.7),
                     0 0 50px rgba(220, 180, 255, 0.5),
                     0 0 75px rgba(180, 130, 255, 0.3),
                     0 3px 10px rgba(0, 0, 0, 0.3);
    }
}

h1 {
    animation: title-glow 2s ease-in-out infinite;
    color: rgba(255, 255, 255, 0.98);
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    animation: float 15s ease-in-out infinite;
    pointer-events: none;
}

/* 浮动赞赏按钮 */
.donate-float-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    font-size: 28px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4),
                0 0 30px rgba(118, 75, 162, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.donate-float-btn:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 6px 30px rgba(102, 126, 234, 0.6),
                0 0 50px rgba(118, 75, 162, 0.5);
}

.donate-float-btn:active {
    transform: scale(0.95);
}

/* 赞赏弹窗 */
.donate-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.donate-modal.show {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.donate-modal-content {
    background: linear-gradient(135deg,
        rgba(102, 126, 234, 0.95) 0%,
        rgba(118, 75, 162, 0.95) 100%);
    backdrop-filter: blur(30px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 40px 30px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    text-align: center;
    animation: slideUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.donate-modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 28px;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.donate-modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .donate-float-btn {
        width: 50px;
        height: 50px;
        font-size: 24px;
        bottom: 20px;
        right: 20px;
    }

    .donate-modal-content {
        padding: 30px 20px;
    }
}