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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #fff5f5 0%, #ffe4e4 100%);
}

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

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(255, 71, 87, 0.3);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: #fff;
}

.red-packet {
    font-size: 30px;
    margin-right: 10px;
}

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

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #ffe4e4;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #fff;
    margin: 3px 0;
}

/* Hero区域 */
.hero {
    padding: 150px 0 80px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 50%, #ffa502 100%);
    color: #fff;
}

.hero-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.hero-text {
    flex: 1;
    min-width: 300px;
    margin-bottom: 40px;
}

.hero-text h1 {
    font-size: 48px;
    margin-bottom: 15px;
    animation: fadeInUp 0.6s ease;
}

.subtitle {
    font-size: 24px;
    margin-bottom: 10px;
    opacity: 0.9;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.description {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.8;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-buttons {
    animation: fadeInUp 0.6s ease 0.6s both;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #fff;
    color: #ff4757;
    margin-right: 15px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: #ff4757;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.banner-img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeInRight 0.8s ease;
    max-height: 500px;
    object-fit: cover;
}
    justify-content: center;
    font-size: 36px;
    border-radius: 15px;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.packet.safe {
    animation: pulse 2s infinite;
}

.packet.mine {
    animation: shake 0.5s ease infinite;
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    75% { transform: translateX(2px); }
}

.result-display {
    background: #fff;
    padding: 15px;
    text-align: center;
    color: #ff4757;
    font-weight: bold;
}

.stats {
    display: flex;
    justify-content: center;
    margin-top: 60px;
    gap: 80px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.8;
}

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

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

/* 功能介绍 */
.features {
    padding: 80px 0;
    background: #fff;
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: linear-gradient(135deg, #fff5f5 0%, #ffe4e4 100%);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(255, 71, 87, 0.2);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* AI 技术分析 */
.ai-tech {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
}

.ai-tech .section-title {
    color: #fff;
}

.tech-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.tech-left,
.tech-right {
    flex: 1;
    min-width: 300px;
}

.tech-center {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.tech-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(255, 71, 87, 0.3);
    border-color: rgba(255, 71, 87, 0.5);
}

.tech-icon {
    font-size: 56px;
    margin-bottom: 20px;
    display: block;
}

.tech-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #fff;
}

.tech-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 20px;
}

.tech-features {
    list-style: none;
    padding: 0;
}

.tech-features li {
    padding: 8px 0;
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tech-features li:last-child {
    border-bottom: none;
}

/* AI 动画效果 */
.ai-animation {
    position: relative;
    width: 280px;
    height: 280px;
}

.neural-network {
    position: relative;
    width: 100%;
    height: 100%;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 71, 87, 0.8);
    animation: nodePulse 2s ease-in-out infinite;
}

.node-1 { top: 20%; left: 20%; animation-delay: 0s; }
.node-2 { top: 20%; right: 20%; animation-delay: 0.3s; }
.node-3 { top: 50%; left: 10%; animation-delay: 0.6s; }
.node-4 { top: 50%; right: 10%; animation-delay: 0.9s; }
.node-5 { bottom: 20%; left: 25%; animation-delay: 1.2s; }
.node-6 { bottom: 20%; right: 25%; animation-delay: 1.5s; }
.node-7 { top: 35%; left: 45%; animation-delay: 1.8s; }
.node-8 { bottom: 35%; right: 45%; animation-delay: 2.1s; }

.connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 71, 87, 0.6), transparent);
    animation: connectionFlow 3s linear infinite;
}

.connection:nth-child(9) {
    top: 30%; left: 25%; width: 50%; transform: rotate(30deg);
}

.connection:nth-child(10) {
    top: 60%; left: 30%; width: 40%; transform: rotate(-20deg);
}

.connection:nth-child(11) {
    top: 40%; left: 50%; width: 30%; transform: rotate(60deg);
}

.pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    border: 2px solid rgba(255, 71, 87, 0.6);
    border-radius: 50%;
    animation: pulseRing 2s ease-out infinite;
}

@keyframes nodePulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.8; }
}

@keyframes connectionFlow {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

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

/* 数据分析展示 */
.data-analysis {
    padding: 80px 0;
    background: linear-gradient(135deg, #fff5f5 0%, #ffe4e4 100%);
}

.data-analysis .section-title {
    color: #333;
}

.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.analysis-card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.analysis-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(255, 71, 87, 0.2);
}

.analysis-header {
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    color: #fff;
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.analysis-icon {
    font-size: 36px;
}

.analysis-header h3 {
    font-size: 20px;
}

.analysis-content {
    padding: 30px;
    text-align: center;
}

.chart-placeholder {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 15px;
}

/* 柱状图 */
.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 15px;
    height: 120px;
}

.bar {
    width: 30px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    border-radius: 5px 5px 0 0;
    animation: barGrow 1.5s ease-out;
    transition: all 0.3s ease;
}

.analysis-card:hover .bar {
    transform: scaleY(1.1);
}

@keyframes barGrow {
    from { transform: scaleY(0); }
    to { transform: scaleY(1); }
}

/* 饼图 */
.pie-chart svg {
    width: 120px;
    height: 120px;
    animation: pieRotate 20s linear infinite;
}

@keyframes pieRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 折线图 */
.line-chart svg {
    width: 180px;
    height: 80px;
}

.line-chart circle {
    animation: dotPulse 2s ease-in-out infinite;
}

.line-chart circle:nth-child(2) { animation-delay: 0s; }
.line-chart circle:nth-child(3) { animation-delay: 0.3s; }
.line-chart circle:nth-child(4) { animation-delay: 0.6s; }

@keyframes dotPulse {
    0%, 100% { r: 4; opacity: 1; }
    50% { r: 6; opacity: 0.7; }
}

.analysis-content p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 下载中心 */
.download {
    padding: 80px 0;
    background: #fff;
}

.download-options {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.download-card {
    background: linear-gradient(135deg, #fff5f5 0%, #ffe4e4 100%);
    padding: 50px 60px;
    border-radius: 25px;
    text-align: center;
    min-width: 280px;
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(255, 71, 87, 0.2);
}

.download-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.download-card h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #333;
}

.download-card p {
    color: #666;
    margin-bottom: 25px;
}

.btn-download {
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    color: #fff;
    padding: 15px 40px;
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 71, 87, 0.4);
}

.download-note {
    text-align: center;
    margin-top: 30px;
    color: #999;
    font-size: 14px;
}

/* 使用教程 */
.guide {
    padding: 80px 0;
    background: linear-gradient(135deg, #fff5f5 0%, #ffe4e4 100%);
}

.guide-content {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
}

.guide-video {
    flex: 1;
    min-width: 280px;
    max-width: 350px;
    margin: 0 auto;
}

.video-container {
    position: relative;
    background: #333;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 9/16;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.video-overlay:hover {
    background: rgba(0, 0, 0, 0.3);
}

.play-button-large {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #fff;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(255, 71, 87, 0.5);
}

.video-overlay:hover .play-button-large {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(255, 71, 87, 0.7);
}

.video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    padding: 20px 15px 15px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-container:hover .video-controls,
.video-container.play .video-controls {
    opacity: 1;
}

.progress-bar {
    position: relative;
    height: 5px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
    margin-bottom: 10px;
    cursor: pointer;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s linear;
}

.progress-thumb {
    position: absolute;
    top: 50%;
    left: 0%;
    transform: translate(-50%, -50%);
    width: 14px;
    height: 14px;
    background: #fff;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.progress-bar:hover .progress-thumb {
    opacity: 1;
}

.control-buttons {
    display: flex;
    align-items: center;
    gap: 15px;
}

.control-btn {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.time-display {
    color: #fff;
    font-size: 12px;
    font-family: monospace;
    flex: 1;
    text-align: center;
}

.guide-steps {
    flex: 1;
    min-width: 300px;
}

.guide-step {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background: #fff;
    border-radius: 15px;
}

.step-badge {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.guide-step h4 {
    margin-bottom: 5px;
    color: #333;
}

.guide-step p {
    color: #666;
    font-size: 14px;
}

/* 用户评价 */
.testimonials {
    padding: 80px 0;
    background: #fff;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: linear-gradient(135deg, #fff5f5 0%, #ffe4e4 100%);
    padding: 30px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

.stars {
    font-size: 20px;
    margin-bottom: 15px;
}

.testimonial-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.author span {
    color: #333;
    font-weight: bold;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    color: #fff;
}

.contact .section-title {
    color: #fff;
}

.contact-content {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
    justify-content: center;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    font-size: 36px;
}

.contact-item h4 {
    margin-bottom: 5px;
}

.contact-item p {
    opacity: 0.9;
}

.contact-form {
    flex: 1;
    min-width: 300px;
    background: rgba(255, 255, 255, 0.15);
    padding: 40px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.contact-form h3 {
    margin-bottom: 25px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
}

.contact-form textarea {
    resize: none;
}

/* 页脚 */
.footer {
    background: #2d2d2d;
    color: #fff;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 5px;
    font-size: 14px;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .hero-content {
        text-align: center;
    }

    .hero-buttons {
        display: flex;
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }

    .btn-primary {
        margin-right: 0;
    }

    .stats {
        gap: 40px;
    }

    .stat-number {
        font-size: 28px;
    }

    .tech-content {
        flex-direction: column;
    }

    .tech-left,
    .tech-right,
    .tech-center {
        width: 100%;
    }

    .ai-animation {
        width: 220px;
        height: 220px;
        margin: 30px auto;
    }

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

    .workflow-steps {
        flex-direction: column;
    }

    .arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 60px;
    }

    .phone-mockup {
        width: 220px;
        height: 440px;
    }

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

    .tech-card {
        padding: 30px 20px;
    }

    .tech-icon {
        font-size: 42px;
    }

    .tech-card h3 {
        font-size: 20px;
    }

    .analysis-header {
        padding: 20px;
    }

    .analysis-content {
        padding: 20px;
    }

    .chart-placeholder {
        height: 150px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 60px;
    }

    .phone-mockup {
        width: 220px;
        height: 440px;
    }

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

/* iOS公告弹窗 */
.ios-notice-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
}

.modal-content {
    position: relative;
    background: #fff;
    border-radius: 20px;
    padding: 40px 30px;
    max-width: 400px;
    width: 100%;
    text-align: center;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.modal-content h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 15px;
}

.modal-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 30px;
}

.modal-buttons {
    display: flex;
    gap: 15px;
}

.modal-buttons .btn {
    flex: 1;
    padding: 15px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-buttons .btn-secondary {
    background: #f5f5f5;
    color: #666;
    border: none;
}

.modal-buttons .btn-primary {
    background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
    color: #fff;
    text-decoration: none;
    text-align: center;
}

.modal-buttons .btn:hover {
    transform: translateY(-2px);
}