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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    color: #333;
    overflow-x: hidden;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

.header {
    padding: 2rem 0;
    text-align: center;
    z-index: 10;
    position: relative;
}

.logo {
    font-size: 3rem;
    font-weight: 300;
    color: #222;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin: 0;
    opacity: 0;
    animation: fadeInDown 1s ease-out 0.5s forwards;
}


.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
}

.visual-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 3rem;
}

.central-dot {
    width: 20px;
    height: 20px;
    background: #222;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 5;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 20px rgba(34, 34, 34, 0.3);
}

.flow-lines {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.flow-line {
    stroke-dasharray: 10, 5;
    stroke-dashoffset: 0;
    opacity: 0.7;
    animation: flowAnimation 4s linear infinite;
}

.line-1 {
    animation-delay: 0s;
}

.line-2 {
    animation-delay: 0.8s;
}

.line-3 {
    animation-delay: 1.6s;
}


.floating-dots {
    position: absolute;
    width: 100%;
    height: 100%;
}

.dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #666;
    border-radius: 50%;
    opacity: 0;
}

.dot-1 {
    top: 20%;
    left: 15%;
    animation: floatDot 3s ease-in-out infinite, fadeInOut 3s ease-in-out infinite;
}

.dot-2 {
    top: 30%;
    right: 20%;
    animation: floatDot 3s ease-in-out infinite 0.5s, fadeInOut 3s ease-in-out infinite 0.5s;
}

.dot-3 {
    bottom: 25%;
    left: 25%;
    animation: floatDot 3s ease-in-out infinite 1s, fadeInOut 3s ease-in-out infinite 1s;
}

.dot-4 {
    bottom: 20%;
    right: 15%;
    animation: floatDot 3s ease-in-out infinite 1.5s, fadeInOut 3s ease-in-out infinite 1.5s;
}

.content-section {
    text-align: center;
    max-width: 600px;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1.5s forwards;
}

.tagline {
    font-size: 2.5rem;
    font-weight: 200;
    color: #222;
    margin-bottom: 1.5rem;
    letter-spacing: 1px;
}

.description {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #666;
    font-weight: 300;
}

.footer {
    text-align: center;
    padding: 2rem;
    color: #999;
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 20px rgba(34, 34, 34, 0.3);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        box-shadow: 0 0 30px rgba(34, 34, 34, 0.5);
    }
}

@keyframes flowAnimation {
    0% {
        stroke-dashoffset: 0;
        opacity: 0.7;
    }
    50% {
        opacity: 1;
    }
    100% {
        stroke-dashoffset: -100;
        opacity: 0.3;
    }
}

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

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0;
    }
    50% {
        opacity: 0.8;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo {
        font-size: 2.5rem;
        letter-spacing: 2px;
    }
    
    
    .visual-container {
        height: 400px;
        margin-bottom: 2rem;
    }
    
    .tagline {
        font-size: 2rem;
    }
    
    .description {
        font-size: 1.1rem;
        padding: 0 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 2rem;
        letter-spacing: 1px;
    }
    
    
    .visual-container {
        height: 300px;
    }
    
    .tagline {
        font-size: 1.8rem;
    }
    
    .description {
        font-size: 1rem;
    }
    
    .central-dot {
        width: 16px;
        height: 16px;
    }
}

/* Hover Effects */
.central-dot:hover {
    animation-play-state: paused;
    transform: translate(-50%, -50%) scale(1.5);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.visual-container:hover .flow-line {
    opacity: 1;
    stroke-width: 3;
    transition: all 0.3s ease;
}

.visual-container:hover .dot {
    opacity: 1;
    transform: scale(1.5);
    transition: all 0.3s ease;
}

/* 交互式点和线条样式 */
.interactive-dots {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 3;
}

.interactive-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    background: #222;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: interactivePulse 1.5s ease-out;
    box-shadow: 0 0 15px rgba(34, 34, 34, 0.4);
}

.dynamic-line {
    stroke: #222;
    stroke-width: 2;
    fill: none;
    opacity: 0;
    animation: dynamicLineAppear 2s ease-out forwards, flowAnimation 4s linear infinite;
    stroke-dasharray: 10, 5;
}

.flow-line.shifting {
    transition: all 2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 新增动画 */
@keyframes interactivePulse {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0.8;
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
}

@keyframes dynamicLineAppear {
    0% {
        opacity: 0;
        stroke-dashoffset: 50;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        opacity: 0.7;
        stroke-dashoffset: 0;
    }
}

@keyframes pathShift {
    0% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(5px, 5px);
    }
    100% {
        transform: translate(0, 0);
    }
}

/* 增强视觉容器的交互性 */
.visual-container {
    cursor: crosshair;
}

.visual-container.interactive-mode .flow-line {
    animation-play-state: paused;
}