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

:root {
    --primary-color: #00a3ff;
    --primary-dark: #007acc;
    --primary-light: #e3f6ff;
    --text-primary: #222;
    --text-secondary: #666;
    --bg-light: #fafafa;
    --bg-white: #fff;
    --border-color: #e5e5e5;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.7;
    font-size: 16px;
    font-weight: 450;
}

.preload * {
    transition: none !important;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.page_wrap {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page_head {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.nav_logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 20px;
}

.nav_logo_icon {
    width: 36px;
    height: 36px;
}

.nav_links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav_links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    padding: 16px 0;
    border-bottom: 3px solid transparent;
}

.nav_links a:hover,
.nav_links a.active {
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
}

.nav_right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang_select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.lang_select:hover {
    border-color: var(--primary-color);
}

.page_main {
    flex: 1;
}

.hero {
    padding: 80px 0;
    text-align: center;
}

.hero_content {
    margin-bottom: 60px;
}

.hero_logo {
    margin-bottom: 24px;
}

.hero_logo_icon {
    width: 140px;
    height: 140px;
}

.hero_title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.hero_subtitle {
    font-size: 20px;
    color: var(--text-secondary);
}

.download_section {
    margin-top: 48px;
}

.download_links {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.download_link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 32px;
    background: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    text-decoration: none;
    color: white;
    transition: var(--transition);
    min-width: 280px;
    justify-content: center;
}

.download_link:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.download_icon {
    width: 32px;
    height: 32px;
    color: white;
}

.download_text {
    font-size: 16px;
    font-weight: 500;
}

.download_text strong {
    font-weight: 600;
}

.download_more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
}

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

.download_more::after {
    content: '→';
    font-size: 18px;
}

.features {
    padding: 60px 0 100px;
}

.features_title {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    color: var(--text-primary);
}

.features_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature_card {
    background: var(--bg-white);
    padding: 32px 24px;
    border-radius: 4px;
    text-align: center;
    transition: all 0.5s ease;
    border-bottom: 4px solid transparent;
    position: relative;
    margin-bottom: 0;
}

.feature_card::after {
    content: '';
    position: absolute;
    inset: 0;
    /* border-radius: 16px; */
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: -1;
}

.feature_card:hover::after {
    opacity: 1;
}

.feature_card:hover {
    border-bottom: 4px solid var(--primary-color);
    transform: translateY(-4px);
    background: transparent;
}

.feature_icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
}

.feature_icon svg {
    width: 100%;
    height: 100%;
}

.feature_title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature_desc {
    font-size: 16px;
    color: var(--text-secondary);
}

.feature_desc strong {
    color: var(--text-primary);
}

.feature_desc a {
    color: var(--primary-color);
    text-decoration: none;
}

.feature_desc a:hover {
    text-decoration: underline;
}

.footer {
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
    padding: 60px 0;
}

.footer_content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 32px;
}

.footer_column h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer_column h5 a {
    color: inherit;
    text-decoration: none;
}

.footer_column h5 a:hover {
    color: var(--primary-color);
}

.footer_column p {
    color: var(--text-secondary);
    font-size: 15px;
}

.footer_column ul {
    list-style: none;
}

.footer_column ul li {
    margin-bottom: 8px;
}

.footer_column ul a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    transition: var(--transition);
}

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

@media (max-width: 992px) {
    .features_grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer_content {
        grid-template-columns: 1fr 1fr 1fr;
    }
    
    .footer_column.brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .nav_links {
        display: flex;
        gap: 16px;
    }
    
    .nav_links li {
        display: none;
    }
    
    .nav_links li:nth-child(1),
    .nav_links li:nth-child(2),
    .nav_links li:nth-child(3) {
        display: block;
    }
    
    .nav_links a {
        font-size: 14px;
    }
    
    .hero_title {
        font-size: 40px;
    }
    
    .hero_subtitle {
        font-size: 18px;
    }
    
    .download_link {
        width: 100%;
        max-width: 400px;
    }
    
    .features_grid {
        grid-template-columns: 1fr;
    }
    
    .footer_content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 48px 0;
    }
    
    .hero_logo_icon {
        width: 100px;
        height: 100px;
    }
    
    .hero_title {
        font-size: 32px;
    }
    
    .features_title {
        font-size: 24px;
    }
}

/* Apps Page Styles */
.apps_page {
    padding: 80px 0 100px;
}

.apps_header {
    text-align: center;
    margin-bottom: 60px;
}

.apps_header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.apps_header p {
    font-size: 20px;
    color: var(--text-secondary);
}

.login_guide {
    background: var(--primary-light);
    border-radius: 12px;
    padding: 32px;
    margin-bottom: 48px;
    border: 1px solid rgba(0, 163, 255, 0.15);
}

.login_guide_title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.login_steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login_step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.login_step_num {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.login_step p {
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding-top: 4px;
}

.login_step code {
    background: rgba(0, 163, 255, 0.12);
    color: var(--primary-color);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
}
.login_step a{
    color: var(--primary-color);
    text-decoration: none;
}

.login_step a:hover {
    text-decoration: underline;
}

.login_step strong {
    color: var(--primary-color);
}

.apps_grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 60px;
}

.app_card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.app_card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.app_icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app_icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.app_card_body {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 16px;
}

.app_card_info {
    flex: 1;
    min-width: 0;
}

.app_card h2 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.app_card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.4;
}

.app_card_actions {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.download_button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}

.download_button:hover {
    background: var(--primary-dark);
}

.button_icon {
    width: 14px;
    height: 14px;
}

.app_version_info {
    display: flex;
    gap: 16px;
    background: var(--bg-light);
    border-radius: 6px;
    padding: 6px 12px;
}

.version_item {
    display: flex;
    align-items: center;
    gap: 4px;
    border-bottom: none;
    padding: 0;
}

.version_item:last-child {
    border-bottom: none;
}

.version_label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.version_value {
    font-size: 12px;
    color: var(--text-primary);
    font-weight: 600;
}

.web_links {
    display: flex;
    gap: 8px;
}

.web_link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

.web_link:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.web_link_label {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-primary);
}

.web_link_url {
    font-size: 12px;
    color: var(--primary-color);
}

.coming_soon_badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    background: linear-gradient(135deg, #FF9500 0%, #FF3B30 100%);
    color: white;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.coming_soon_badge svg {
    width: 14px;
    height: 14px;
}

.app_info {
    display: flex;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.app_info span {
    padding: 2px 8px;
    background: var(--bg-light);
    border-radius: 4px;
}

.apps_features {
    text-align: center;
}

.apps_features h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    color: var(--text-primary);
}

.apps_features_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature_item {
    padding: 32px;
}

.feature_item svg {
    width: 56px;
    height: 56px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature_item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature_item p {
    font-size: 15px;
    color: var(--text-secondary);
}

.android_icon {
    background: linear-gradient(135deg, #3DDC84 0%, #0F9D58 100%);
}

.windows_icon {
    background: linear-gradient(135deg, #0078D4 0%, #00BCF2 100%);
}

.web_icon {
    background: linear-gradient(135deg, #FF5722 0%, #FF9800 100%);
}

.ios_icon {
    background: linear-gradient(135deg, #147CE5 0%, #5AC8FA 100%);
}

.mac_icon {
    background: linear-gradient(135deg, #555 0%, #000 100%);
}

.linux_icon {
    background: linear-gradient(135deg, #147CE5 0%, #5AC8FA 100%);
}

@media (max-width: 992px) {
    .apps_features_grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .apps_header h1 {
        font-size: 36px;
    }
}

@media (max-width: 768px) {
    .apps_features_grid {
        grid-template-columns: 1fr;
    }

    .apps_header h1 {
        font-size: 32px;
    }

    .apps_header p {
        font-size: 18px;
    }

    .app_card {
        flex-wrap: wrap;
    }

    .app_card_body {
        flex-wrap: wrap;
    }

    .app_card_actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .app_version_info {
        flex-wrap: wrap;
    }
}

.privacy_page {
    padding: 60px 0 100px;
    max-width: 900px;
    margin: 0 auto;
}

.privacy_title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 50px;
}

.privacy_content {
    line-height: 1.8;
}

.privacy_heading {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 40px 0 20px;
}

.privacy_subheading {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 30px 0 15px;
}

.privacy_smallsubheading {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 10px;
}

.privacy_paragraph {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.privacy_list {
    margin: 10px 0 20px 30px;
}

.privacy_list li {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.privacy_content a {
    color: var(--primary-color);
    text-decoration: none;
}

.privacy_content a:hover {
    text-decoration: underline;
}

.faq_page {
    padding: 60px 0 100px;
    max-width: 900px;
    margin: 0 auto;
}

.faq_title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.faq_intro {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.faq_nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.faq_nav_item {
    display: inline-block;
    padding: 8px 16px;
    background: var(--bg-light);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.faq_nav_item:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.faq_section {
    margin-bottom: 30px;
}

.faq_section_title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 30px;
    padding-top: 20px;
}

.faq_item {
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.faq_item:last-child {
    border-bottom: none;
}

.faq_question {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.faq_answer {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.faq_answer a {
    color: var(--primary-color);
    text-decoration: none;
}

.faq_answer a:hover {
    text-decoration: underline;
}