/* Reset and Base Styles */
* {
    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: #1a1a1a;
    background: #fafafa;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
}

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

.nav-links a {
    text-decoration: none;
    color: #4b5563;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: #2563eb;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: #2563eb;
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="50" r="1" fill="white" opacity="0.05"/></pattern></defs><rect width="1000" height="1000" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    color: white;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.highlight-text {
    background: linear-gradient(45deg, #ffd700, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-features {
    display: flex;
    gap: 20px;
    margin: 20px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.feature-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(45deg, #ffd700, #ff6b6b);
    color: white;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

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

.floating-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    text-align: center;
    position: relative;
    animation: float 6s ease-in-out infinite;
}

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

.discount-badge {
    position: absolute;
    top: -15px;
    right: -15px;
    background: linear-gradient(45deg, #ff6b6b, #ffd700);
    color: white;
    padding: 10px 15px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.3);
}

.floating-card h3 {
    color: #1a1a1a;
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.floating-card p {
    color: #6b7280;
}

/* Announcement Section */
.announcement {
    background: white;
    padding: 30px 0;
    border-bottom: 1px solid #e5e7eb;
}

.announcement-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.announcement-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 12px;
    border-left: 4px solid #2563eb;
}

.announcement-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.announcement-item h4 {
    color: #1a1a1a;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.announcement-item p {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.1rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: #fafafa;
}

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

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e5e7eb;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Pricing Section */
.pricing {
    padding: 100px 0;
    background: white;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.pricing-card {
    background: white;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 2px solid #e5e7eb;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card.featured {
    border-color: #2563eb;
    transform: scale(1.05);
}

.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(45deg, #2563eb, #3b82f6);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-header {
    margin-bottom: 30px;
}

.pricing-header h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.price {
    font-size: 1.2rem;
    font-weight: 700;
    color: #2563eb;
    background: #eff6ff;
    padding: 10px 20px;
    border-radius: 25px;
    display: inline-block;
}

.pricing-features {
    margin-bottom: 30px;
}

.pricing-features .feature {
    padding: 8px 0;
    color: #6b7280;
    border-bottom: 1px solid #f3f4f6;
}

.pricing-card .btn {
    width: 100%;
}

/* Purchase Links */
.purchase-links {
    padding: 80px 0;
    background: #f8fafc;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.link-card {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    color: #1a1a1a;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    border: 1px solid #e5e7eb;
}

.link-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    color: #1a1a1a;
}

.link-icon {
    font-size: 2.5rem;
    margin-right: 20px;
    flex-shrink: 0;
}

.link-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.link-content p {
    color: #6b7280;
    font-size: 0.9rem;
}

.link-arrow {
    margin-left: auto;
    font-size: 1.5rem;
    color: #2563eb;
    font-weight: bold;
}

/* Tutorial Section */
.tutorial {
    padding: 100px 0;
    background: white;
}

.tutorial-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 30px;
    background: #f8fafc;
    border-radius: 16px;
    border-left: 4px solid #2563eb;
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateX(10px);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, #2563eb, #3b82f6);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h3 {
    color: #1a1a1a;
    margin-bottom: 10px;
    font-size: 1.3rem;
    font-weight: 600;
}

.step-content p {
    color: #6b7280;
    line-height: 1.6;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: #f8fafc;
}

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

.contact-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid #e5e7eb;
}

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

.contact-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 10px;
}

.contact-card p {
    color: #6b7280;
    margin-bottom: 10px;
    font-weight: 500;
}

.contact-card small {
    color: #9ca3af;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-section a {
    color: #9ca3af;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #2563eb;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #374151;
    padding-top: 30px;
}

.footer-bottom p {
    color: #9ca3af;
    margin-bottom: 5px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    position: absolute;
    right: 20px;
    top: 15px;
    cursor: pointer;
    z-index: 1;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close:hover {
    color: #2563eb;
    background: #f3f4f6;
}

.modal-body {
    text-align: center;
    padding: 40px 30px 30px;
    margin-top: 20px;
}

.modal-body h3 {
    color: #1a1a1a;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-features {
    display: flex;
    gap: 20px;
    margin: 20px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.feature-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .floating-card {
        padding: 30px 20px;
    }
    
    .features-grid,
    .pricing-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .tutorial-steps {
        grid-template-columns: 1fr;
    }
    
    .step {
        padding: 20px;
    }
    
    .announcement-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .feature-card,
    .pricing-card,
    .contact-card {
        padding: 30px 20px;
    }
    
    .modal-content {
        margin: 20% auto;
        padding: 20px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Additional Mobile Optimizations */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .hero {
        min-height: auto;
        padding: 100px 0 50px;
    }
    
    .hero-container {
        gap: 30px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-features {
    display: flex;
    gap: 20px;
    margin: 20px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.feature-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .floating-card {
        transform: scale(0.9);
    }
    
    .section-header {
        margin-bottom: 30px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .feature-card,
    .pricing-card,
    .contact-card {
        padding: 30px 20px;
    }
    
    .tutorial-steps {
        gap: 20px;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .step-number {
        align-self: center;
    }
    
    .link-card {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .link-icon {
        margin-right: 0;
        margin-bottom: 10px;
    }
    
    .link-arrow {
        margin-left: 0;
        margin-top: 10px;
    }
    
    .footer-content {
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-container {
        padding: 0 15px;
    }
    
    .floating-card {
        padding: 25px 15px;
        transform: scale(0.8);
    }
    
    .discount-badge {
        top: -10px;
        right: -10px;
        padding: 8px 12px;
        font-size: 0.8rem;
    }
    
    .announcement-item {
        padding: 15px;
        gap: 10px;
    }
    
    .announcement-icon {
        font-size: 1.2rem;
    }
    
    .pricing-grid {
        gap: 20px;
    }
    
    .pricing-card.featured {
        transform: scale(1.02);
    }
    
    .modal-content {
        width: 95%;
        margin: 30% auto;
    }
    
    .modal-body {
        padding: 30px 20px 20px;
    }
}

/* Touch-friendly buttons */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 48px;
        padding: 16px 24px;
    }
    
    .close {
        width: 44px;
        height: 44px;
        font-size: 24px;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .hero {
        background: #000;
    }
    
    .hero-title {
        color: #fff;
    }
    
    .btn-primary {
        background: #fff;
        color: #000;
        border: 2px solid #fff;
    }
    
    .feature-card,
    .pricing-card,
    .contact-card {
        border: 2px solid #000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-card {
        animation: none;
    }
}