/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --warning-color: #ed8936;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 动画定义 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

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

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: fadeInDown 0.6s ease-out;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    color: white;
    transition: opacity 0.3s;
}

.logo a:hover {
    opacity: 0.9;
}

.logo img {
    height: 36px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    animation: float 3s ease-in-out infinite;
}

.logo span {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    opacity: 0.8;
}

/* 英雄区 */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 600px;
}

/* Canvas背景 */
.ai-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* AI可视化叠加层 */
.ai-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

/* 神经网络节点 */
.neural-network {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 80%;
    max-width: 800px;
    height: 400px;
    perspective: 1000px;
}

.node-layer {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    height: 100%;
    position: relative;
}

.node {
    width: 12px;
    height: 12px;
    background: rgba(30, 20, 80, 0.8);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(60, 40, 120, 0.8),
                0 0 40px rgba(30, 20, 80, 0.6),
                inset 0 0 10px rgba(100, 80, 160, 0.5);
    animation: nodePulse 2s ease-in-out infinite;
    position: relative;
    border: 1px solid rgba(100, 80, 160, 0.4);
}

.node::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    background: radial-gradient(circle, rgba(60, 40, 120, 0.4) 0%, transparent 70%);
    border-radius: 50%;
    animation: nodeGlow 2s ease-in-out infinite;
}

.layer-1 .node:nth-child(1) { animation-delay: 0s; }
.layer-1 .node:nth-child(2) { animation-delay: 0.2s; }
.layer-1 .node:nth-child(3) { animation-delay: 0.4s; }
.layer-1 .node:nth-child(4) { animation-delay: 0.6s; }

.layer-2 .node:nth-child(1) { animation-delay: 0.1s; }
.layer-2 .node:nth-child(2) { animation-delay: 0.3s; }
.layer-2 .node:nth-child(3) { animation-delay: 0.5s; }
.layer-2 .node:nth-child(4) { animation-delay: 0.7s; }
.layer-2 .node:nth-child(5) { animation-delay: 0.9s; }
.layer-2 .node:nth-child(6) { animation-delay: 1.1s; }

.layer-3 .node:nth-child(1) { animation-delay: 0.2s; }
.layer-3 .node:nth-child(2) { animation-delay: 0.4s; }
.layer-3 .node:nth-child(3) { animation-delay: 0.6s; }
.layer-3 .node:nth-child(4) { animation-delay: 0.8s; }

@keyframes nodePulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.5);
        opacity: 1;
    }
}

@keyframes nodeGlow {
    0%, 100% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.5);
    }
}

/* 浮动数字 */
.data-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.floating-number {
    position: absolute;
    color: rgba(30, 20, 80, 0.6);
    font-size: 1.5rem;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 10px rgba(60, 40, 120, 0.5);
    animation: floatNumber 8s ease-in-out infinite;
}

@keyframes floatNumber {
    0% {
        transform: translateY(100vh) translateX(0) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
        transform: translateY(80vh) translateX(20px) scale(1);
    }
    90% {
        opacity: 0.6;
        transform: translateY(20vh) translateX(-20px) scale(1);
    }
    100% {
        transform: translateY(0) translateX(0) scale(0);
        opacity: 0;
    }
}

/* Hero内容层 */
.hero-content {
    position: relative;
    z-index: 10;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 70%
    );
    animation: shimmer 6s infinite;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 500;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    animation: pulse 1s infinite;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 功能特色 */
.features {
    padding: 5rem 0;
    background: var(--bg-white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border-color);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: inline-block;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: rotateY(360deg);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 关于我们 */
.about {
    padding: 5rem 0;
    background: var(--bg-light);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.1rem;
    line-height: 1.9;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

/* 免责声明 */
.disclaimer {
    padding: 5rem 0;
    background: var(--bg-white);
}

.disclaimer-content {
    max-width: 800px;
    margin: 0 auto;
    background: #fff3cd;
    padding: 2rem;
    border-radius: 15px;
    border-left: 5px solid var(--warning-color);
}

.disclaimer-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

/* 隐私政策页面 */
.privacy-policy {
    padding: 3rem 0;
    background: var(--bg-white);
    min-height: calc(100vh - 200px);
}

.page-title {
    font-size: 3rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.update-date {
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 2rem;
    font-style: italic;
}

.policy-content {
    max-width: 900px;
    margin: 0 auto;
}

.policy-section {
    margin-bottom: 3rem;
}

.policy-section h2 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 600;
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
}

.policy-section h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin: 1.5rem 0 1rem;
    font-weight: 600;
}

.policy-section p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.policy-section ul {
    list-style-position: inside;
    margin-left: 1rem;
}

.policy-section li {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 0.8rem;
}

.policy-section li strong {
    color: var(--text-dark);
}

.policy-footer {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 10px;
    margin-top: 3rem;
    text-align: center;
}

.policy-footer p {
    font-size: 1.1rem;
    color: var(--primary-color);
}

/* 页脚 */
footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.footer-section p,
.footer-section li {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 2rem;
    }

    .policy-section h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 3rem 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }
}