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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    min-height: 100vh;
    color: #fff;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    overflow-x: hidden;
}

.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    z-index: 0;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(26, 26, 46, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    font-size: 28px;
}

.brand-text {
    font-size: 20px;
    font-weight: 600;
}

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

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s;
    font-size: 15px;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.nav-link.active {
    background: linear-gradient(135deg, #4285f4, #34a853);
    color: #fff;
}

.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 20px 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.logo-container {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 0 auto 40px;
}

.logo-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid rgba(66, 133, 244, 0.5);
}

.logo-ring.ring-2 {
    width: 140px;
    height: 140px;
    border-color: rgba(52, 168, 83, 0.4);
}

.logo-ring.ring-3 {
    width: 100px;
    height: 100px;
    border-color: rgba(251, 188, 4, 0.3);
}

.logo-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: bold;
    color: #fff;
    box-shadow: 0 10px 40px rgba(66, 133, 244, 0.5);
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff, #e0e0e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #4285f4, #34a853);
    color: #fff;
    box-shadow: 0 4px 20px rgba(66, 133, 244, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(66, 133, 244, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.stats-grid {
    display: flex;
    gap: 40px;
    margin-top: 60px;
    flex-wrap: wrap;
    justify-content: center;
}

.stat-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 30px 40px;
    text-align: center;
    transition: all 0.3s;
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, #4285f4, #34a853);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    margin-top: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.features-section, .language-section, .compare-section, .usage-section, .faq-section {
    padding: 100px 40px;
    position: relative;
    z-index: 1;
}

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

.section-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-desc {
    color: rgba(255, 255, 255, 0.6);
    font-size: 18px;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
    transition: all 0.3s;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-10px);
}

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

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* Language Section */
.language-section {
    background: rgba(0, 0, 0, 0.1);
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.lang-category {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.lang-category h4 {
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.lang-category ul {
    list-style: none;
}

.lang-category li {
    padding: 8px 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

/* Compare Section */
.compare-section {
    background: rgba(0, 0, 0, 0.1);
}

.compare-wrapper {
    max-width: 900px;
    margin: 0 auto;
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    overflow: hidden;
}

.compare-table th, .compare-table td {
    padding: 18px 20px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.compare-table th {
    background: rgba(0, 0, 0, 0.3);
    font-size: 16px;
}

.compare-table td.highlight {
    color: #4ade80;
    font-weight: 500;
}

.compare-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Usage Section */
.usage-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s;
}

.usage-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.usage-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.usage-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.usage-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* FAQ Section */
.faq-section {
    background: rgba(0, 0, 0, 0.1);
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    gap: 20px;
}

.faq-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-item h4 {
    font-size: 17px;
    margin-bottom: 12px;
    color: #fff;
}

.faq-item p {
    font-size: 14px;
    opacity: 0.85;
    line-height: 1.7;
}

/* Download Section */
.download-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 20px 60px;
    position: relative;
    z-index: 1;
}

.download-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 60px;
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.download-icon-wrap {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 30px;
}

.download-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: bold;
    color: #fff;
    position: relative;
    z-index: 1;
}

.icon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    border-radius: 50%;
    opacity: 0.5;
}

.download-card h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

.download-desc {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 30px;
}

.download-info {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 30px;
    text-align: left;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: rgba(255, 255, 255, 0.5);
}

.info-value {
    color: #fff;
    font-weight: 500;
}

.btn-download {
    width: 100%;
    justify-content: center;
    font-size: 18px;
    padding: 18px;
}

.download-tips {
    margin-top: 30px;
    text-align: left;
    padding: 20px;
    background: rgba(66, 133, 244, 0.1);
    border-radius: 16px;
}

.download-tips h4 {
    margin-bottom: 15px;
    color: #4285f4;
}

.download-tips ul {
    list-style: none;
    padding: 0;
}

.download-tips li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.download-tips li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #34a853;
}

.back-link {
    display: inline-block;
    margin-top: 30px;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s;
}

.back-link:hover {
    color: #fff;
}

/* App Guide Section */
.app-guide-section {
    padding: 80px 40px;
    position: relative;
    z-index: 1;
}

.app-guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.app-guide-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s;
}

.app-guide-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.app-icon {
    font-size: 60px;
    margin-bottom: 15px;
}

.app-guide-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.app-guide-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
}

.btn-app {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(135deg, #4285f4, #34a853);
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-app:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(66, 133, 244, 0.4);
}

/* Features Mini Section */
.features-mini-section {
    padding: 60px 40px;
    background: rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

.features-mini-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.feature-mini-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 12px 24px;
    font-size: 15px;
}

.feature-mini-icon {
    font-size: 20px;
}

.footer {
    text-align: center;
    padding: 30px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .stats-grid {
        flex-direction: column;
        gap: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .navbar {
        padding: 15px 20px;
    }
    
    .download-card {
        padding: 40px 20px;
    }
    
    .compare-table {
        font-size: 13px;
    }
    
    .compare-table th, .compare-table td {
        padding: 12px 10px;
    }
}