/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --chrome-blue: #4285F4;
    --chrome-green: #34A853;
    --chrome-yellow: #FBBC05;
    --chrome-red: #EA4335;
    --dark-color: #2d3748;
    --light-color: #f8f9fa;
    --gray-color: #e2e8f0;
    --text-color: #4a5568;
    --heading-color: #2d3748;
    --gradient: linear-gradient(135deg, var(--chrome-blue), var(--chrome-green));
    --gradient-light: linear-gradient(135deg, rgba(66, 133, 244, 0.1), rgba(52, 168, 83, 0.1));
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--heading-color);
    text-decoration: none;
}

.logo svg {
    width: 40px;
    height: 40px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: var(--transition);
}

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

.mobile-menu {
    display: none;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--heading-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    background: var(--gradient-light);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" x="0" y="0" width="10" height="10" patternUnits="userSpaceOnUse"><circle cx="2" cy="2" r="1" fill="%23667eea" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    opacity: 0.3;
    z-index: 0;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.hero-content h1 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-color);
}

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

.btn-primary {
    display: inline-block;
    padding: 15px 30px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

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

.visual-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    width: 100%;
    max-width: 400px;
}

.grid-item {
    aspect-ratio: 1;
    border-radius: 15px;
    background: var(--gradient);
    box-shadow: var(--shadow);
    animation: float 6s ease-in-out infinite;
}

.grid-item.item-1 {
    animation-delay: 0s;
}

.grid-item.item-2 {
    animation-delay: 1s;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
}

.grid-item.item-3 {
    animation-delay: 2s;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.grid-item.item-4 {
    animation-delay: 3s;
}

/* 服务区域 */
.services {
    padding: 100px 0;
    background-color: white;
}

.services h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--heading-color);
}

.services h2 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--gradient);
    color: white;
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--heading-color);
}

.service-card p {
    color: var(--text-color);
    line-height: 1.6;
}

/* 项目展示 */
.projects {
    padding: 100px 0;
    background: var(--gradient-light);
}

.projects h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.projects h2 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 60px;
    color: var(--text-color);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.project-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.project-image {
    height: 250px;
    background: var(--gradient);
    position: relative;
    overflow: hidden;
}

.project-image.image-2 {
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
}

.project-image.image-3 {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.project-image.image-4 {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .image-overlay {
    opacity: 1;
}

.view-project {
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border: 2px solid white;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

.view-project:hover {
    background: white;
    color: var(--primary-color);
}

.project-info {
    padding: 30px;
}

.project-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--heading-color);
}

.project-info p {
    color: var(--text-color);
    line-height: 1.6;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: white;
}

.about .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--heading-color);
}

.about-content h2 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-color);
    line-height: 1.7;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
}

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

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 1rem;
    color: var(--text-color);
    margin: 0;
}

.about-visual {
    position: relative;
}

.team-photo {
    position: relative;
    height: 400px;
}

.team-member {
    position: absolute;
    width: 200px;
    height: 250px;
    background: var(--gradient);
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.team-member:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

.team-member.member-2 {
    top: 50px;
    left: 100px;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    z-index: 1;
}

.team-member.member-3 {
    top: 100px;
    left: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--gradient-light);
}

.contact h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.contact h2 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 60px;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--gray-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.contact-form button {
    width: 100%;
    padding: 15px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.contact-form button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.info-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.info-item svg {
    color: var(--primary-color);
    flex-shrink: 0;
    margin-top: 5px;
}

.info-item span {
    color: var(--text-color);
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo {
    max-width: 300px;
}

.footer-logo .logo {
    color: white;
    margin-bottom: 15px;
}

.footer-logo .logo svg {
    stroke: white;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    line-height: 1.6;
}

.footer-links h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

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

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

.social-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.8rem;
    }

    .cta-buttons {
        justify-content: center;
    }

    .about .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-stats {
        justify-content: center;
    }

    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: center;
        padding: 30px 0;
        box-shadow: var(--shadow);
        transform: translateY(-150%);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .mobile-menu {
        display: block;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .services h2,
    .projects h2,
    .about-content h2,
    .contact h2 {
        font-size: 2rem;
    }

    .team-photo {
        height: 300px;
    }

    .team-member {
        width: 150px;
        height: 200px;
    }

    .team-member.member-2 {
        top: 30px;
        left: 50px;
    }

    .team-member.member-3 {
        top: 60px;
        left: 120px;
    }

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

@media (max-width: 576px) {
    .hero {
        padding: 100px 0 60px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

    .services,
    .projects,
    .about,
    .contact {
        padding: 80px 0;
    }

    .services h2,
    .projects h2,
    .about-content h2,
    .contact h2 {
        font-size: 1.8rem;
    }

    .service-card,
    .contact-form {
        padding: 30px 20px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

/* 延迟动画 */
.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

.delay-4 {
    animation-delay: 0.8s;
}

/* 下载页面样式 */
.download-hero {
    padding: 150px 0 80px;
    background: var(--gradient-light);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" x="0" y="0" width="10" height="10" patternUnits="userSpaceOnUse"><circle cx="2" cy="2" r="1" fill="%23667eea" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    opacity: 0.3;
    z-index: 0;
}

.download-hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--heading-color);
    position: relative;
    z-index: 1;
}

.download-hero h1 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-color);
    position: relative;
    z-index: 1;
}

/* 下载资源区域 */
.download-resources {
    padding: 100px 0;
    background: white;
}

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

.resource-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.resource-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.resource-card:hover::before {
    transform: scaleX(1);
}

.resource-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: var(--transition);
}

.resource-card:hover .resource-icon {
    background: var(--gradient);
    color: white;
    transform: scale(1.1);
}

.resource-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--heading-color);
}

.resource-card p {
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.resource-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    padding: 10px 0;
    border-top: 1px solid var(--gray-color);
    border-bottom: 1px solid var(--gray-color);
}

.file-size,
.file-type {
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: 500;
}

.download-btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--gradient);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* 系统要求 */
.system-requirements {
    padding: 100px 0;
    background: var(--gradient-light);
}

.system-requirements h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--heading-color);
}

.system-requirements h2 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.requirement-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.requirement-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.requirement-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.requirement-card ul {
    list-style: none;
    padding: 0;
}

.requirement-card li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: var(--text-color);
    line-height: 1.6;
}

.requirement-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* FAQ部分 */
.faq {
    padding: 100px 0;
    background: white;
}

.faq h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--heading-color);
}

.faq h2 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    background: white;
}

.faq-question {
    padding: 20px 30px;
    background: white;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    font-weight: 600;
    color: var(--heading-color);
    border-bottom: 1px solid var(--gray-color);
}

.faq-question:hover {
    background: var(--gradient-light);
}

.faq-question svg {
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
    background: white;
}

.faq-answer p {
    padding: 20px 0;
    color: var(--text-color);
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

/* 导航链接激活状态 */
.nav-links a.active {
    color: var(--chrome-blue);
}

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

/* 导航栏下载链接特别样式 */
.download-link {
    background: var(--gradient);
    color: white !important;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

.download-link:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.download-link::after {
    display: none;
}

/* 浏览器模拟界面 */
.browser-mockup {
    width: 100%;
    max-width: 400px;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-hover);
    overflow: hidden;
    animation: float 6s ease-in-out infinite;
}

.browser-header {
    background: #f1f1f1;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.browser-controls {
    display: flex;
    gap: 8px;
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control-dot.red {
    background: var(--chrome-red);
}

.control-dot.yellow {
    background: var(--chrome-yellow);
}

.control-dot.green {
    background: var(--chrome-green);
}

.browser-url {
    flex: 1;
}

.url-bar {
    background: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-color);
    border: 1px solid var(--gray-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chrome-animation {
    width: 100%;
    max-width: 200px;
    animation: pulse 3s ease-in-out infinite;
}

.chrome-animation svg {
    width: 100%;
    height: auto;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.browser-content {
    height: 300px;
    background: #f9f9f9;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.content-section {
    height: 60px;
    background: white;
    border-radius: 8px;
    border: 1px solid var(--gray-color);
}

.content-section.section-2 {
    height: 80px;
}

.content-section.section-3 {
    height: 40px;
    width: 70%;
}

/* 安全特性区域 */
.security-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.security-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.security-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.security-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--heading-color);
}

.security-card p {
    color: var(--text-color);
    line-height: 1.6;
}

/* Chrome标志 */
.chrome-logo {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto;
}

.logo-circle {
    position: absolute;
    border-radius: 50%;
}

.logo-circle.blue {
    width: 200px;
    height: 200px;
    background: var(--chrome-blue);
    top: 0;
    left: 0;
}

.logo-circle.red {
    width: 120px;
    height: 120px;
    background: var(--chrome-red);
    top: -20px;
    right: -20px;
    z-index: 1;
}

.logo-circle.yellow {
    width: 80px;
    height: 80px;
    background: var(--chrome-yellow);
    bottom: 20px;
    right: 20px;
    z-index: 2;
}

.logo-circle.green {
    width: 100px;
    height: 100px;
    background: var(--chrome-green);
    bottom: -10px;
    left: 30px;
    z-index: 1;
}

/* 下载页面平台卡片 */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.platform-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.platform-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.platform-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.platform-card:hover::before {
    transform: scaleX(1);
}

.platform-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.platform-card:hover .platform-icon {
    background: var(--gradient);
    transform: scale(1.1);
}

.platform-card:hover .platform-icon svg {
    color: white;
}

.platform-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--heading-color);
}

.platform-card p {
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.platform-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    padding: 10px 0;
    border-top: 1px solid var(--gray-color);
    border-bottom: 1px solid var(--gray-color);
}

.file-size,
.version {
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: 500;
}

/* 特别的下载按钮 */
.chrome-download {
    display: inline-block;
    padding: 15px 30px;
    background: var(--gradient);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.chrome-download::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.chrome-download:hover::before {
    left: 100%;
}

.chrome-download:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0.4);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(66, 133, 244, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0);
    }
}

/* 移动设备应用商店按钮 */
.mobile-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.app-store-btn,
.play-store-btn {
    display: block;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    text-align: center;
}

.app-store-btn {
    background: #000;
    color: white;
}

.play-store-btn {
    background: #34A853;
    color: white;
}

.app-store-btn:hover,
.play-store-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .browser-mockup {
        max-width: 300px;
    }
    
    .browser-content {
        height: 250px;
    }
    
    .chrome-logo {
        width: 150px;
        height: 150px;
    }
    
    .logo-circle.blue {
        width: 150px;
        height: 150px;
    }
    
    .logo-circle.red {
        width: 90px;
        height: 90px;
        top: -15px;
        right: -15px;
    }
    
    .logo-circle.yellow {
        width: 60px;
        height: 60px;
        bottom: 15px;
        right: 15px;
    }
    
    .logo-circle.green {
        width: 75px;
        height: 75px;
        bottom: -8px;
        left: 20px;
    }
}

/* 版权信息样式 */
.footer-bottom {
    justify-content: center !important;
}

.copyright-info {
    text-align: center;
}

.copyright-info p {
    color: rgba(255, 255, 255, 0.7);
    margin: 10px 0;
}

.copyright-info p:first-child {
    font-weight: 600;
}

.copyright-info p:last-child {
    font-size: 0.9rem;
    opacity: 0.8;
}