/* 下载页面 Banner */
.download-hero {
    background: linear-gradient(135deg, #1E3A8A 0%, #3B82F6 100%);
    color: white;
    padding: 140px 0 100px;
    text-align: center;
}

.download-hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
}

.download-hero-content p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.download-action {
    margin-top: 30px;
}

.btn-download-main {
    padding: 18px 48px;
    font-size: 20px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-download-main:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.download-info {
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.8;
}

/* 下载内容区域 */
.download-content {
    padding: 80px 0;
    background-color: #F9FAFB;
}

.download-info-card {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 60px;
}

.download-platforms {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.platform-panel {
    background-color: #F9FAFB;
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.platform-panel.active {
    background-color: #F9FAFB;
}

.platform-info {
    padding: 40px;
    flex: 1;
}

.platform-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.platform-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: #1E3A8A;
}

.version {
    background-color: #10B981;
    color: white;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.system-requirements {
    margin-bottom: 0;
}

.system-requirements h3 {
    font-size: 16px;
    font-weight: 600;
    color: #1F2937;
    margin-bottom: 12px;
}

.system-requirements ul {
    list-style: none;
}

.system-requirements li {
    padding: 8px 0;
    color: #6B7280;
    font-size: 14px;
    padding-left: 22px;
    position: relative;
}

.system-requirements li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10B981;
    font-weight: bold;
    font-size: 12px;
}

/* 应用预览 */
.platform-preview {
    background: linear-gradient(135deg, #1E3A8A 0%, #3B82F6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    min-height: 200px;
}

.app-screenshot {
    width: 100%;
}

.screenshot-placeholder {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    border: 2px dashed rgba(255, 255, 255, 0.3);
}

.preview-icon {
    font-size: 60px;
    display: block;
    margin-bottom: 15px;
}

.screenshot-placeholder p {
    color: white;
    font-size: 14px;
    opacity: 0.8;
}

/* 功能亮点 */
.features-highlight {
    padding: 100px 0;
    background-color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    background-color: #F9FAFB;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1E3A8A;
    margin-bottom: 10px;
}

.feature-item p {
    color: #6B7280;
    font-size: 14px;
}

/* 安装指南 */
.install-guide {
    padding: 100px 0;
    background-color: #F9FAFB;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #1E3A8A 0%, #3B82F6 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 22px;
    font-weight: 600;
    color: #1E3A8A;
    margin-bottom: 15px;
}

.step p {
    color: #6B7280;
    font-size: 15px;
}

/* 下载FAQ */
.download-faq {
    padding: 100px 0;
    background-color: white;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .download-platforms {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 768px) {
    .download-hero {
        padding: 120px 0 60px;
    }

    .download-hero-content h1 {
        font-size: 32px;
    }

    .btn-download-main {
        padding: 15px 36px;
        font-size: 18px;
    }

    .download-info-card {
        padding: 40px 30px;
    }

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

@media (max-width: 480px) {
    .download-hero-content h1 {
        font-size: 24px;
    }

    .download-info-card {
        padding: 30px 20px;
    }

    .feature-item {
        padding: 20px;
    }
}