/* Reset i style podstawowe - 合并了*和body规则 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Navbar - 简化了backdrop-filter，支持移动端 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px); /* 移除不必要transition，移到JS动态 */
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    min-width: 0;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.logo-img {
    height: 2.3rem;
    width: auto;
    object-fit: contain;
    transform: translate(3px, 1px);
}

.brand-name {
    color: #000 !important;
    font-weight: 600 !important;
    font-size: 3.2rem;
    font-family: 'Arial', 'Helvetica bold', sans-serif;
    letter-spacing: -3.5px;
    text-transform: uppercase;
    margin: 0;
    line-height: 1;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.8rem;
    margin-left: 1rem;
    flex-shrink: 0;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 0.7rem;
    white-space: nowrap;
    transition: color 0.3s ease;
    flex-shrink: 0;
}

.nav-menu a:hover {
    color: #00aeef;
}

.nav-buttons {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.btn-primary, .btn-secondary {
    padding: 5px 12px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-primary {
    background: linear-gradient(135deg, #00aeef, #0090cc);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 174, 239, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #00aeef;
    border: 2px solid #00aeef;
}

.btn-secondary:hover {
    background: #00aeef;
    color: white;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero - 简化背景，只保留关键渐变，移动端用solid color fallback */
.hero {
    background: 
        linear-gradient(135deg, #00aeef 0%, #0088cc 100%),
        repeating-linear-gradient(0deg, transparent 0px, transparent 4px, rgba(255,255,255,0.08) 4px, rgba(255,255,255,0.08) 5px),
        repeating-linear-gradient(90deg, transparent 0px, transparent 4px, rgba(255,255,255,0.08) 4px, rgba(255,255,255,0.08) 5px);
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.25rem;
    color: #fff;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn-large {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.btn-outline {
    background: transparent;
    color: #00aeef;
    border: 2px solid #00aeef;
}

.btn-outline:hover {
    background: #00aeef;
    color: white;
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
}

.stat-label {
    font-size: 0.9rem;
    color: #fff;
}

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

.carousel-container {
    width: 400px;
    height: 350px;
    position: relative;
    overflow: visible;
}

.carousel-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-caption {
    position: absolute;
    bottom: -60px;
    left: 0;
    right: 0;
    background: transparent;
    color: #fff;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    border: 2px solid #fff;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

.carousel-indicators {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.3s ease;
}

.indicator.active {
    background: #fff;
}

/* Features - 合并了通用卡片规则，减少重复阴影 */
.features {
    padding: 80px 0;
    background: white;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.18);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #00aeef, #0090cc);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Products - 复用feature-card的hover，减少代码 */
.products {
    padding: 80px 0;
    background: #f8fafc;
}

.products h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 3rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
    transition: transform 0.3s ease;
}

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

.product-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.product-icon i {
    font-size: 1.8rem;
    color: white;
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.product-card p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.product-card ul {
    list-style: none;
}

.product-card li {
    color: #64748b;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.product-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* Pricing - 合并li规则 */
.pricing {
    padding: 80px 0;
    background: white;
}

.pricing h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 3rem;
}

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

.pricing-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
    text-align: center;
    position: relative;
    transition: transform 0.3s ease;
}

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

.pricing-card.featured {
    border: 2px solid #00aeef;
    transform: scale(1.05);
}

.featured-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: #00aeef;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1.5rem;
}

.price {
    margin-bottom: 2rem;
}

.currency {
    font-size: 1.5rem;
    color: #64748b;
    vertical-align: top;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: #00aeef;
}

.period {
    font-size: 1rem;
    color: #64748b;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-card li {
    color: #64748b;
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.pricing-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* About - 合并stats规则 */
.about {
    padding: 80px 0;
    background: #f8fafc;
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 1.1rem;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

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

.about-stat .stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: #00aeef;
}

.about-stat .stat-label {
    font-size: 0.9rem;
    color: #64748b;
}

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

.about-professional-img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
    transition: transform 0.3s ease;
    margin-left: 20px;
}

.about-professional-img:hover {
    transform: scale(1.05);
}

/* Contact - 合并form规则 */
.contact {
    padding: 80px 0;
    background: white;
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 3rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.app-download-section h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1rem;
}

.app-download-section p {
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.app-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-2px);
}

.feature-item i {
    font-size: 1.5rem;
    color: #00aeef;
}

.feature-item span {
    font-weight: 500;
    color: #374151;
}

.official-contact {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #00aeef, #0090cc);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon i {
    font-size: 1.2rem;
    color: white;
}

.contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: #64748b;
    margin: 0;
}

.contact-item a {
    color: #00aeef;
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.app-download-buttons {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #00aeef;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer - 简化social-links */
.footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #f8fafc;
}

.footer-section p {
    color: #cbd5e1;
    line-height: 1.6;
    margin-bottom: 1rem;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #00aeef;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #334155;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.social-links a:hover {
    background: #00aeef;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #334155;
    color: #cbd5e1;
}

/* Testimonials - 合并nav规则 */
.testimonials {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 3rem;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.8s ease;
}

.testimonial-card.animate {
    opacity: 1;
    transform: translateX(0);
}

.testimonial-content {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
    text-align: center;
    position: relative;
}

.testimonial-content::before {
    content: '"';
    font-size: 4rem;
    color: #00aeef;
    position: absolute;
    top: -10px;
    left: 20px;
    font-family: serif;
}

.testimonial-avatar {
    margin-bottom: 1.5rem;
}

.testimonial-avatar-img {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    display: inline-block;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.testimonial-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #475569;
    margin-bottom: 2rem;
    font-style: italic;
}

.testimonial-author span:first-child {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
    display: block;
}

.testimonial-author span {
    color: #64748b;
    font-size: 0.9rem;
}

.testimonials-indicators {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.testimonial-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #cbd5e1;
    cursor: pointer;
    transition: background 0.3s ease;
}

.testimonial-indicator.active {
    background: #00aeef;
}

.testimonial-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.testimonial-nav:hover {
    background: #00aeef;
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.testimonial-nav.prev {
    left: -25px;
}

.testimonial-nav.next {
    right: -25px;
}

.testimonial-nav i {
    font-size: 1.2rem;
    color: #64748b;
}

.testimonial-nav:hover i {
    color: white;
}

/* Experts - 合并li规则 */
.experts {
    padding: 5rem 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.experts h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 3rem;
}

.experts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.expert-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.expert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.18);
}

.expert-image {
    width: 100%;
    height: 350px;
    overflow: hidden;
    position: relative;
}

.expert-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform 0.3s ease;
}

.expert-card:nth-child(1) .expert-img {
    object-position: center 10%;
}

.expert-card:nth-child(2) .expert-img {
    object-position: center 20%;
}

.expert-card:hover .expert-img {
    transform: scale(1.05);
}

.expert-info {
    padding: 2rem;
}

.expert-info h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1rem;
    border-bottom: 3px solid #00aeef;
    padding-bottom: 0.5rem;
}

.expert-details {
    margin-bottom: 1.5rem;
}

.expert-details p {
    color: #64748b;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.expert-education,
.expert-experience,
.expert-expertise {
    margin-bottom: 1.5rem;
}

.expert-education h4,
.expert-experience h4,
.expert-expertise h4 {
    color: #00aeef;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.expert-education ul,
.expert-experience ul {
    list-style: none;
    padding-left: 0;
}

.expert-education li,
.expert-experience li {
    color: #475569;
    margin-bottom: 0.5rem;
    padding-left: 1.2rem;
    position: relative;
    font-size: 0.9rem;
    line-height: 1.6;
}

.expert-education li::before,
.expert-experience li::before {
    content: "•";
    color: #00aeef;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.expert-expertise p {
    color: #475569;
    line-height: 1.6;
    font-size: 0.9rem;
}

/* Download buttons - 合并hover */
.download-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    min-width: 180px;
    background: #000;
    color: white;
    border: 1px solid #fff;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.app-store,
.google-play {
    background: #000;
    color: white;
}

.app-store:hover,
.google-play:hover {
    background: #1a1a1a;
}

.download-btn i {
    font-size: 1.5rem;
}

.download-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.download-text small {
    font-size: 0.7rem;
    opacity: 0.9;
    font-weight: 400;
}

.download-text strong {
    font-size: 1rem;
    font-weight: 600;
}

.app-stats {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.app-stats .stat {
    text-align: center;
}

.app-stats .stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #00aeef;
}

.app-stats .stat-label {
    display: block;
    font-size: 0.9rem;
    color: #64748b;
    margin-top: 0.25rem;
}

/* Responsywny - 合并所有媒体查询，减少重复 */
@media (max-width: 1024px) {
    .nav-menu { gap: 0.6rem; margin-left: 0.5rem; }
    .nav-menu a { font-size: 0.65rem; }
    .nav-buttons { gap: 0.3rem; }
    .btn-primary, .btn-secondary { padding: 4px 8px; font-size: 0.65rem; }
    .testimonials-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; padding: 0 20px; }
    .experts-grid { grid-template-columns: 1fr; gap: 2rem; padding: 0 20px; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-menu, .nav-buttons { display: none; }
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-content h1 { font-size: 2.5rem; }
    .hero-stats { justify-content: center; }
    .about-content { grid-template-columns: 1fr; text-align: center; }
    .contact-content { grid-template-columns: 1fr; }
    .features-grid, .products-grid, .pricing-grid { grid-template-columns: 1fr; }
    .pricing-card.featured { transform: none; }
    .testimonials { padding: 3rem 0; }
    .testimonials h2 { font-size: 2rem; }
    .testimonials-grid { grid-template-columns: 1fr; gap: 1.5rem; padding: 0 20px; }
    .testimonial-content { padding: 2rem; }
    .experts { padding: 3rem 0; }
    .experts h2 { font-size: 2rem; }
    .experts-grid { padding: 0 20px; }
    .expert-info { padding: 1.5rem; }
    .expert-info h3 { font-size: 1.5rem; }
    .download-buttons { flex-direction: column; gap: 1rem; }
    .download-btn { justify-content: center; min-width: auto; }
    .app-stats { flex-direction: column; gap: 1rem; }
    .app-features { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-content h1 { font-size: 2rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-stats, .about-stats { flex-direction: column; gap: 1rem; }
    .hero { background-attachment: scroll; background-size: cover; background-position: center center; }
    .carousel-container { width: 300px; height: 200px; }
    .testimonials-grid { padding: 0 15px; }
    .testimonial-content { padding: 1.5rem; }
    .testimonial-text p { font-size: 1rem; }
    .experts-grid { padding: 0 15px; }
    .expert-info { padding: 1rem; }
    .expert-image { height: 300px; }
}

/* Ripple keyframes - 移到CSS，减少JS动态插入 */
@keyframes ripple {
    to { transform: scale(4); opacity: 0; }
}