:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #6366f1;
    --secondary-color: #0ea5e9;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --background-color: #f8fafc;
    --card-color: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius-sm: 0.25rem;
    --radius: 0.375rem;
    --radius-lg: 0.5rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-color);
    line-height: 1.5;
    background-color: var(--background-color);
    position: relative;
    overflow-x: hidden;
}

.blur-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.08), transparent 40%),
                radial-gradient(circle at bottom left, rgba(14, 165, 233, 0.08), transparent 40%);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
}

.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 1px 2px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-dark));
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #f9fafb;
    color: var(--primary-dark);
}

.btn-download {
    padding: 0.75rem 2rem;
    font-size: 1.0625rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 3px 8px rgba(79, 70, 229, 0.2);
    transition: all 0.3s ease;
    width: 100%;
    max-width: 300px;
}

.btn-download:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    box-shadow: 0 3px 8px rgba(79, 70, 229, 0.2);
    transform: none;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    padding: 0.75rem 0;
}

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

.logo h1 {
    font-size: 1.375rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav ul {
    display: flex;
    gap: 1.25rem;
}

.nav a {
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.925rem;
}

.nav a:hover {
    color: var(--primary-color);
}

.nav a.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* Hero Section */
.hero {
    padding: 3rem 0 2.5rem;
}

.hero .container {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.hero-content {
    max-width: 600px;
}

.hero-content h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    line-height: 1.2;
    background: linear-gradient(90deg, var(--text-color), var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-content p {
    font-size: 1.0625rem;
    color: var(--text-light);
    margin-bottom: 1.75rem;
}

.cta-buttons {
    display: flex;
    gap: 0.75rem;
}

.hero-image {
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-lg);
    padding: 0.75rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    max-width: 100%;
}

.hero-image::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(14, 165, 233, 0.08));
    border-radius: calc(var(--radius-lg) + 5px);
    z-index: -1;
}

.hero-image img {
    border-radius: var(--radius);
    display: block;
}

/* Section Styles */
section {
    padding: 3rem 0;
}

.section-title {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -0.4rem;
    left: 30%;
    width: 40%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
}

.section-subtitle {
    text-align: center;
    margin-bottom: 2rem;
    margin-top: -0.5rem;
    color: var(--text-light);
}

.section-subtitle p {
    font-size: 1.0625rem;
}

.section-subtitle a {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.2s ease;
}

.section-subtitle a:hover {
    color: var(--primary-dark);
}

.cta-buttons-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color 0.3s ease;
}

.feature-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    color: white;
    font-size: 1.25rem;
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.9375rem;
}

/* How It Works Section */
.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    position: relative;
    background: rgba(255, 255, 255, 0.65);
    border-radius: var(--radius);
    padding: 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: border-color 0.3s ease;
}

.step:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.step:not(:last-child)::after {
    display: none;
}

.step-number {
    width: 2.25rem;
    height: 2.25rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.step-content h3 {
    font-size: 1.125rem;
    margin-bottom: 0.375rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.step-content p {
    color: var(--text-light);
    font-size: 0.9375rem;
}

.demo-container {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    transition: border-color 0.3s ease;
}

.demo-container:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.demo-container::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(14, 165, 233, 0.08));
    border-radius: calc(var(--radius) + 5px);
    z-index: -1;
}

.demo-image {
    border-radius: var(--radius);
    display: block;
}

.demo-caption {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.demo-badge {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.25rem 0.875rem;
    border-radius: 1rem;
    margin-bottom: 0.5rem;
}

.demo-caption p {
    color: var(--text-light);
    font-size: 0.9375rem;
    margin: 0;
}

/* Download Section */
.download-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.download-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.download-card.premium {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(14, 165, 233, 0.05));
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.popular-tag {
    position: absolute;
    top: -0.625rem;
    right: 1.25rem;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.2rem 0.875rem;
    border-radius: 1rem;
}

.download-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.375rem;
    font-weight: 600;
}

.download-card p {
    color: var(--text-light);
    margin-bottom: 1.25rem;
    font-size: 0.9375rem;
}

.feature-list {
    margin-bottom: 1.5rem;
}

.feature-list li {
    padding: 0.375rem 0;
    position: relative;
    padding-left: 1.375rem;
    font-size: 0.9375rem;
}

.feature-list li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.system-requirements {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
}

.system-requirements h3 {
    font-size: 1.125rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
    text-align: center;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.25rem;
}

.requirement h4 {
    font-size: 0.9375rem;
    margin-bottom: 0.375rem;
    font-weight: 600;
    color: var(--primary-color);
}

.requirement p {
    color: var(--text-light);
    font-size: 0.875rem;
}

.requirement p.notice {
    color: #e11d48;
    font-weight: 500;
    border-left: 2px solid #e11d48;
    padding-left: 0.5rem;
}

.download-single {
    margin-bottom: 2.5rem;
}

/* 增强版下载区域 */
.download-card-wrapper {
    margin-bottom: 2.5rem;
}

.download-card-enhanced {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.8));
    border-radius: var(--radius);
    box-shadow: 0 2px 12px rgba(79, 70, 229, 0.08);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(79, 70, 229, 0.15);
    padding: 2rem;
    max-width: 700px;
    margin: 0 auto;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}

.download-card-enhanced::before {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: 50%;
    bottom: -100px;
    right: -100px;
    z-index: -1;
}

.download-card-enhanced::after {
    content: '';
    position: absolute;
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(99, 102, 241, 0.1));
    border-radius: 50%;
    top: -75px;
    left: -75px;
    z-index: -1;
}

.download-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.download-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.2);
}

.download-title h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
    color: var(--text-color);
}

.version-tag {
    display: inline-block;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.2rem 0.75rem;
    border-radius: 1rem;
    margin-left: 0.5rem;
    vertical-align: middle;
}

.download-title p {
    color: var(--text-light);
    font-size: 0.9375rem;
    margin: 0;
}

.download-features {
    margin-bottom: 1.75rem;
}

.feature-list-enhanced {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.875rem;
}

.feature-list-enhanced li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
    font-size: 0.9375rem;
}

.feature-list-enhanced li i {
    color: var(--primary-color);
    font-size: 1rem;
}

.download-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.version-info {
    font-size: 0.8125rem;
    color: var(--text-light);
}

/* 增强版系统要求 */
.system-requirements-enhanced {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.15);
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.system-requirements-enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), transparent);
    z-index: 1;
}

.system-requirements-enhanced h3 {
    font-size: 1.25rem;
    margin-bottom: 1.75rem;
    font-weight: 600;
    text-align: center;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
}

.system-requirements-enhanced h3 i {
    color: var(--primary-color);
}

.requirements-grid-enhanced {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.requirement-enhanced {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color 0.3s ease;
}

.requirement-enhanced:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.notice-requirement {
    background: rgba(255, 246, 246, 0.7);
    border: 1px solid rgba(225, 29, 72, 0.1);
    grid-column: 1 / -1;
}

.requirement-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    flex-shrink: 0;
}

.notice-requirement .requirement-icon {
    background: linear-gradient(135deg, #f43f5e, #e11d48);
}

.requirement-content h4 {
    font-size: 1rem;
    margin-bottom: 0.375rem;
    font-weight: 600;
    color: var(--text-color);
}

.requirement-content p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin: 0;
}

.notice-requirement .requirement-content p {
    color: #b91c1c;
}

@media (max-width: 767px) {
    .feature-list-enhanced {
        grid-template-columns: 1fr;
    }
    
    .download-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .download-icon {
        margin: 0 auto;
    }
    
    .download-card-enhanced {
        padding: 1.5rem;
    }
}

.download-card.centered {
    max-width: 600px;
    margin: 0 auto;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(14, 165, 233, 0.05));
    border: 1px solid rgba(79, 70, 229, 0.15);
    box-shadow: 0 2px 10px rgba(79, 70, 229, 0.08);
}

/* FAQ Section */
.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.faq-item {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-question {
    padding: 1.25rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question h3 {
    font-size: 1.0625rem;
    font-weight: 600;
}

.toggle-icon {
    font-size: 1.25rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 1.25rem 1.25rem;
    display: none;
}

.faq-answer p {
    color: var(--text-light);
    font-size: 0.9375rem;
}

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

.faq-item.active .faq-answer {
    display: block;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(90deg, rgba(79, 70, 229, 0.1), rgba(14, 165, 233, 0.1), rgba(79, 70, 229, 0.1));
    padding: 0;
    text-align: center;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1), transparent 70%);
    border-radius: 50%;
    top: -250px;
    right: 10%;
    z-index: 1;
}

.cta-section::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.1), transparent 70%);
    border-radius: 50%;
    bottom: -200px;
    left: 10%;
    z-index: 1;
}

.cta-content {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 0;
    padding: 4rem 2rem;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
    max-width: 100%;
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-size: 2.25rem;
    margin-bottom: 1.25rem;
    font-weight: 700;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    background: linear-gradient(90deg, var(--primary-dark), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.cta-content p {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 1.125rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-content .btn {
    font-size: 1.125rem;
    padding: 0.875rem 2.5rem;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.2);
    border-radius: 2rem;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-weight: 600;
}

.cta-content .btn:hover {
    background: linear-gradient(90deg, var(--primary-dark), var(--primary-color));
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.cta-note {
    margin-top: 1.25rem;
    font-size: 0.875rem;
    color: var(--text-light);
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
}

.cta-note i {
    color: #e11d48;
}

/* Footer */
.footer {
    background: rgba(31, 41, 55, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.75rem;
    margin-bottom: 2.5rem;
}

.footer-col h3 {
    font-size: 1.125rem;
    margin-bottom: 1.25rem;
    background: linear-gradient(90deg, var(--primary-light), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: 1.25rem;
    color: white;
}

.footer-col p {
    color: #d1d5db;
    margin-bottom: 1.25rem;
    font-size: 0.9375rem;
}

.footer-col ul li {
    margin-bottom: 0.625rem;
}

.footer-col ul li a {
    color: #d1d5db;
    transition: color 0.2s ease;
    font-size: 0.9375rem;
}

.footer-col ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 0.875rem;
}

.social-links a {
    width: 2.25rem;
    height: 2.25rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.2s ease;
}

.social-links a:hover {
    background: var(--primary-color);
}

.copyright {
    text-align: center;
    color: #9ca3af;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.25rem;
    font-size: 0.875rem;
}

/* Media Queries */
@media (min-width: 768px) {
    .hero .container {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
    
    .hero-content {
        flex: 1;
    }
    
    .hero-image {
        flex: 1;
    }
    
    .steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .step:nth-child(1)::after,
    .step:nth-child(3)::after {
        display: none;
    }
}

@media (max-width: 767px) {
    .download-options {
        grid-template-columns: 1fr;
    }
    
    .hero-content h2 {
        font-size: 1.875rem;
    }
    
    .feature-card {
        padding: 1.25rem;
    }
}

@media (max-width: 480px) {
    .header .container {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .nav ul {
        gap: 0.875rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons-group {
        flex-direction: column;
        gap: 0.75rem;
    }
}

/* 图片查看相关样式 */
.image-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-overlay.visible {
    opacity: 1;
}

.image-overlay img {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--radius);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    transition: background 0.2s ease;
}

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

/* 统一下载卡片 */
.download-unified-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.8));
    border-radius: var(--radius);
    box-shadow: 0 2px 12px rgba(79, 70, 229, 0.08);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(79, 70, 229, 0.15);
    max-width: 1000px;
    margin: 0 auto 3rem;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: border-color 0.3s ease;
}

.download-unified-card:hover {
    border-color: rgba(99, 102, 241, 0.5);
}

.download-unified-card::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: 50%;
    bottom: -150px;
    right: -150px;
    z-index: -1;
}

.download-unified-card::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(99, 102, 241, 0.1));
    border-radius: 50%;
    top: -100px;
    left: -100px;
    z-index: -1;
}

.download-section {
    padding: 2rem;
    border-bottom: 1px solid rgba(79, 70, 229, 0.1);
}

.requirements-section {
    padding: 2rem;
}

.requirements-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1.75rem;
    font-weight: 600;
    text-align: center;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
}

.requirements-section h3 i {
    color: var(--primary-color);
}

@media (min-width: 992px) {
    .download-unified-card {
        flex-direction: row;
    }

    .download-section {
        width: 50%;
        border-bottom: none;
        border-right: 1px solid rgba(79, 70, 229, 0.1);
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .requirements-section {
        width: 50%;
    }
}

@media (max-width: 991px) {
    .download-unified-card {
        flex-direction: column;
    }

    .download-section, 
    .requirements-section {
        width: 100%;
    }
}

@media (max-width: 767px) {
    .feature-list-enhanced {
        grid-template-columns: 1fr;
    }
    
    .download-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .download-icon {
        margin: 0 auto;
    }
    
    .download-section,
    .requirements-section {
        padding: 1.5rem;
    }
}

/* 新的FAQ样式 */
.faq-grid-new {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.faq-item-new {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.faq-item-new:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: rgba(99, 102, 241, 0.4);
}

.faq-item-new h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--primary-dark);
    position: relative;
    padding-left: 1.5rem;
}

.faq-item-new h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0.75rem;
    height: 0.75rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 50%;
}

.faq-item-new p {
    color: var(--text-light);
    font-size: 0.9375rem;
    line-height: 1.6;
}

@media (max-width: 991px) {
    .faq-grid-new {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .faq-grid-new {
        grid-template-columns: 1fr;
    }
}

/* 应用场景区域 */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.use-case-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color 0.3s ease;
}

.use-case-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.use-case-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    color: white;
    font-size: 1.25rem;
}

.use-case-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.use-case-card p {
    color: var(--text-light);
    font-size: 0.9375rem;
    line-height: 1.6;
}