@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;600;700&family=Roboto:wght@400;700&display=swap');

/* 通用样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'Roboto', sans-serif;
    line-height: 1.7;
    color: #333;
    background-color: #f8f9fa;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

h1, h2, h3 {
    color: #2c3e50;
    font-weight: 700;
}

h1 {
    font-size: 3.2em;
    line-height: 1.2;
    margin-bottom: 20px;
}

h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

h3 {
    font-size: 1.6em;
    font-weight: 600;
}

p {
    margin-bottom: 15px;
    font-size: 1.05em;
    color: #555;
}

.section-title {
    text-align: center;
    position: relative;
    display: inline-block;
    width: 100%;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #3498db, #2ecc71);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2em;
    color: #666;
    margin-bottom: 40px;
}

/* 按钮样式 */
.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 16px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    letter-spacing: 0.5px;
    font-size: 1.05em;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
    text-decoration: none;
}

.btn-large {
    padding: 18px 50px;
    font-size: 1.15em;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    }
    50% {
        box-shadow: 0 10px 40px rgba(102, 126, 234, 0.5);
    }
}

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

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

header .container {
    position: relative;
    z-index: 2;
}

.header-icon {
    font-size: 5em;
    margin-bottom: 20px;
    animation: bounce 2s ease-in-out infinite;
}

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

header h1 {
    color: #fff;
    margin-bottom: 25px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

header h1 .highlight {
    background: linear-gradient(to right, #ffd89b, #19547b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-subtitle {
    font-size: 1.3em;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.95);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.scroll-indicator {
    margin-top: 60px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9em;
}

.arrow-down {
    width: 30px;
    height: 30px;
    border-left: 2px solid rgba(255, 255, 255, 0.8);
    border-bottom: 2px solid rgba(255, 255, 255, 0.8);
    transform: rotate(-45deg);
    margin: 10px auto;
    animation: arrow-bounce 2s ease-in-out infinite;
}

@keyframes arrow-bounce {
    0%, 100% { transform: rotate(-45deg) translateY(0); }
    50% { transform: rotate(-45deg) translateY(10px); }
}

/* Sections */
section {
    padding: 80px 0;
    position: relative;
}

.section-alt {
    background-color: #f0f4f8;
}

/* Features Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.feature-item {
    background: #fff;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.4s ease;
    border: 2px solid transparent;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
    border-color: #667eea;
}

.feature-icon {
    font-size: 4em;
    margin-bottom: 20px;
}

.feature-item h3 {
    color: #2c3e50;
    margin: 20px 0 15px;
    font-size: 1.5em;
}

.feature-item p {
    font-size: 1em;
    color: #666;
    text-align: center;
}

/* Solution Section */
#solution {
    background: linear-gradient(to bottom, #fff 0%, #f8f9fa 100%);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.solution-item {
    background: #fff;
    padding: 35px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid #f0f0f0;
}

.solution-item:hover {
    border-color: #2ecc71;
    transform: translateY(-5px);
}

.solution-icon {
    font-size: 3.5em;
    margin-bottom: 15px;
}

.solution-item h3 {
    color: #2c3e50;
    margin: 15px 0;
    font-size: 1.4em;
}

/* Price Box */
.price-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 60px 40px;
    border-radius: 25px;
    text-align: center;
    margin-top: 60px;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.price-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: #ffd700;
    color: #333;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9em;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
}

.price-value {
    font-size: 5em;
    font-weight: bold;
    margin: 20px 0;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.currency {
    font-size: 0.5em;
    vertical-align: super;
}

.price-description {
    font-size: 1.3em;
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.95);
}

.price-features {
    list-style: none;
    margin: 30px 0;
    padding: 0;
}

.price-features li {
    font-size: 1.1em;
    padding: 10px 0;
    color: rgba(255, 255, 255, 0.95);
}

.price-box .btn-primary {
    background: #fff;
    color: #667eea;
    font-weight: 700;
    margin-top: 20px;
}

.price-box .btn-primary:hover {
    background: #f0f0f0;
    color: #764ba2;
}

/* Testimonials */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.testimonial-item {
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    position: relative;
    border-left: 5px solid #667eea;
    transition: all 0.3s ease;
}

.testimonial-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.12);
}

.quote-icon {
    font-size: 4em;
    color: #667eea;
    opacity: 0.2;
    position: absolute;
    top: 20px;
    left: 30px;
    font-family: Georgia, serif;
}

.testimonial-text {
    font-style: italic;
    color: #555;
    font-size: 1.1em;
    margin: 20px 0 30px;
    position: relative;
    z-index: 1;
    text-align: left;
}

.client-info {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 20px;
}

.client-avatar {
    font-size: 3em;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f4f8;
    border-radius: 50%;
}

.client-name {
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
    text-align: left;
}

.client-title {
    color: #999;
    font-size: 0.9em;
    margin: 5px 0 0;
    text-align: left;
}

.rating {
    margin-top: 15px;
    font-size: 1.2em;
}

/* Use Cases Section */
#use-cases {
    background: linear-gradient(to bottom, #f0f4f8 0%, #fff 100%);
    padding: 100px 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
    margin-top: 60px;
}

.use-case-item {
    background: #fff;
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.use-case-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.use-case-item:hover::before {
    transform: scaleX(1);
}

.use-case-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.12);
    border-color: #667eea;
}

.use-case-icon {
    font-size: 3.5em;
    margin-bottom: 20px;
    text-align: center;
}

.use-case-item h3 {
    color: #2c3e50;
    margin: 15px 0 20px;
    font-size: 1.4em;
    text-align: center;
}

.use-case-quote {
    font-style: italic;
    color: #555;
    line-height: 1.7;
    margin-bottom: 20px;
    text-align: left;
    font-size: 0.95em;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 3px solid #667eea;
}

.use-case-author {
    text-align: right;
    color: #999;
    font-size: 0.85em;
    font-weight: 600;
    margin: 0;
}

.use-cases-cta {
    margin-top: 80px;
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 25px;
    color: #fff;
}

.use-cases-cta h3 {
    color: #fff;
    font-size: 2em;
    margin-bottom: 40px;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.insight-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px 20px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.insight-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.insight-number {
    display: block;
    font-size: 2.5em;
    font-weight: 700;
    color: #ffd700;
    margin-bottom: 15px;
}

.insight-item p {
    color: #fff;
    margin: 0;
    font-size: 1.05em;
    font-weight: 500;
}

.cta-text {
    font-size: 1.4em;
    margin: 40px 0 30px;
    color: rgba(255, 255, 255, 0.95);
}

.use-cases-cta .btn-primary {
    background: #fff;
    color: #667eea;
    font-weight: 700;
}

.use-cases-cta .btn-primary:hover {
    background: #f0f0f0;
    color: #764ba2;
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 60px auto 0;
}

.faq-item {
    background: #fff;
    padding: 25px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    border: 2px solid #f0f0f0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: #667eea;
}

.faq-item h3 {
    text-align: left;
    color: #2c3e50;
    margin: 0;
    padding-right: 40px;
    position: relative;
    font-size: 1.3em;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-toggle {
    font-size: 1.5em;
    color: #667eea;
    transition: transform 0.3s ease;
    font-weight: 300;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-item p {
    text-align: left;
    color: #666;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    padding-top: 0;
}

.faq-item.active p {
    max-height: 200px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

/* Contact Form */
#contact {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.preparation-section {
    background: #fff;
    padding: 50px;
    border-radius: 25px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 60px;
}

.prep-title {
    text-align: center;
    color: #2c3e50;
    font-size: 1.8em;
    margin-bottom: 40px;
}

.prep-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.prep-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 30px 20px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.prep-item:hover {
    transform: translateY(-5px);
    border-color: #667eea;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.prep-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.prep-item h4 {
    color: #2c3e50;
    margin: 10px 0;
    font-size: 1.2em;
}

.prep-item p {
    color: #666;
    font-size: 0.95em;
    margin: 8px 0;
}

.prep-note {
    color: #999;
    font-size: 0.85em;
    font-style: italic;
}

.prep-link {
    display: inline-block;
    color: #667eea;
    font-weight: 600;
    margin-top: 10px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.prep-link:hover {
    color: #764ba2;
    transform: translateX(3px);
}

.prep-notice {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 20px 30px;
    border-radius: 15px;
    text-align: center;
}

.prep-notice p {
    margin: 0;
    color: #fff;
    font-size: 1.05em;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 50px;
    margin-top: 60px;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.contact-form {
    background: #fff;
    padding: 50px;
    border-radius: 25px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #2c3e50;
    font-weight: 600;
    font-size: 0.95em;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 1em;
    transition: all 0.3s ease;
    font-family: inherit;
}

.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form textarea:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    outline: none;
}

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

.contact-form button {
    width: 100%;
    margin-top: 10px;
}

.contact-info-box {
    background: #fff;
    padding: 40px;
    border-radius: 25px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.contact-info-box h3 {
    color: #2c3e50;
    margin-bottom: 30px;
    text-align: center;
}

.qr-code-container {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 15px;
}

.qr-code {
    max-width: 250px;
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 0 auto 15px;
    display: block;
    object-fit: contain;
}

.qr-note {
    color: #666;
    font-size: 0.9em;
    margin: 5px 0;
}

.qr-note strong {
    color: #667eea;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: #f0f4f8;
    transform: translateX(5px);
}

.contact-icon {
    font-size: 2.5em;
    flex-shrink: 0;
}

.contact-label {
    font-size: 0.85em;
    color: #999;
    margin: 0 0 5px 0;
    text-align: left;
}

.contact-value {
    font-weight: 600;
    color: #2c3e50;
    margin: 0;
    text-align: left;
}

/* Footer */
footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: #ecf0f1;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-brand h3 {
    color: #fff;
    margin-bottom: 10px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.95em;
}

.footer-links a:hover {
    color: #fff;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
    font-size: 0.9em;
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-in;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .testimonial-grid {
        grid-template-columns: 1fr;
    }

    .use-cases-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .insights-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .prep-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5em;
    }

    h2 {
        font-size: 2em;
    }

    header {
        padding: 80px 0 60px;
    }

    section {
        padding: 60px 0;
    }

    .feature-grid,
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .price-value {
        font-size: 4em;
    }

    .contact-form {
        padding: 30px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    .use-cases-grid {
        grid-template-columns: 1fr;
    }

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

    .use-cases-cta {
        padding: 40px 25px;
    }

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

    .preparation-section {
        padding: 30px 20px;
    }

    .qr-code {
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2em;
    }
    
    h2 {
        font-size: 1.6em;
    }
    
    .header-subtitle {
        font-size: 1.1em;
    }
    
    .btn-primary {
        padding: 14px 30px;
        font-size: 1em;
    }
    
    .price-value {
        font-size: 3em;
    }
    
    .contact-form,
    .contact-info-box {
        padding: 25px;
    }

    .use-case-item {
        padding: 25px;
    }

    .use-cases-cta h3 {
        font-size: 1.5em;
    }

    .prep-title {
        font-size: 1.4em;
    }

    .preparation-section {
        padding: 25px 15px;
    }
}