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

body {
    font-family: "Microsoft YaHei", "SimHei", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Header */
.header {
    background-color: #fff;
    padding: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    height: 80px;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    height: 100%;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
    height: 100%;
}

.logo-circle {
    width: 60px;
    height: 60px;
    background: linear-gradient(180deg, #89b549 0%, #277c4d 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-text {
    color: #fff;
    font-size: 14px;
    text-align: center;
    line-height: 1.3;
    font-weight: bold;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.logo-name {
    font-size: 24px;
    color: #148c4e;
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 0;
    align-items: stretch;
    height: 100%;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-size: 16px;
    padding: 0 30px;
    border-radius: 0;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-width: 140px;
    width: 140px;
    white-space: nowrap;
}

.nav-link:hover {
    color: #148c4e;
    background-color: #f5f5f5;
}

.nav-link.active {
    background-color: #FF9800;
    color: #fff;
}

/* Banner */
.banner {
    background-color: #148c4e;
    padding: 80px 0;
    color: #fff;
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.banner-logo {
    flex-shrink: 0;
}

.banner-logo-circle {
    width: 150px;
    height: 150px;
    background-color: #148c4e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid #fff;
    overflow: hidden;
}

.banner-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 10px;
}

.banner-text {
    flex: 1;
}

.banner-title {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
}

.banner-slogan {
    font-size: 24px;
    margin-bottom: 30px;
    color: #fff;
}

.banner-description {
    font-size: 16px;
    line-height: 1.8;
    color: #fff;
}

/* Content Section */
.content {
    padding: 60px 0;
    background-color: #fff;
}

.app-title-section {
    margin-bottom: 40px;
}

.app-title {
    font-size: 36px;
    color: #333;
    margin: 0;
    margin-bottom: 5px;
    font-weight: normal;
}

.app-subtitle {
    font-size: 16px;
    color: #999;
    display: block;
    margin-left: 5px;
    margin-bottom: 15px;
}

.app-title-line {
    width: 100%;
    height: 1px;
    background-color: #e0e0e0;
    margin-top: 15px;
}

.app-content-row {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 50px;
}

.app-image {
    width: 400px;
    height: 300px;
    border-radius: 8px;
    flex-shrink: 0;
    object-fit: cover;
}

.app-description {
    font-size: 18px;
    color: #333;
    line-height: 2;
    margin: 0;
    flex: 1;
    padding: 40px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    letter-spacing: 0.5px;
    position: relative;
}

.app-description::before {
    content: '"';
    font-size: 60px;
    color: #148c4e;
    opacity: 0.15;
    position: absolute;
    top: 20px;
    left: 20px;
    font-family: Georgia, serif;
    line-height: 1;
}

.app-description::after {
    content: '"';
    font-size: 60px;
    color: #148c4e;
    opacity: 0.15;
    position: absolute;
    bottom: 20px;
    right: 20px;
    font-family: Georgia, serif;
    line-height: 1;
}

.features {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.feature-item {
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 8px;
    border-left: 4px solid #148c4e;
}

.feature-title {
    font-size: 24px;
    color: #148c4e;
    margin-bottom: 15px;
    font-weight: bold;
}

.feature-description {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
}

/* Contact Section */
.contact-content {
    padding: 80px 0;
}

.contact-section {
    max-width: 800px;
    margin: 0 auto;
}

.contact-title {
    font-size: 36px;
    color: #333;
    margin-bottom: 30px;
    text-align: center;
}

.contact-description {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 50px;
    text-align: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
    background-color: #f9f9f9;
    padding: 40px;
    border-radius: 8px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-label {
    font-size: 18px;
    color: #333;
    font-weight: bold;
    min-width: 100px;
}

.contact-value {
    font-size: 18px;
    color: #666;
    flex: 1;
}

/* Footer */
.footer {
    background-color: #1565C0;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

.footer-company {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 15px;
}

.footer-info {
    font-size: 14px;
    line-height: 1.8;
}

.footer-info a {
    color: #fff;
    text-decoration: none;
}

.footer-info a:hover {
    color: #fff;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .banner-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .banner-title {
        font-size: 36px;
    }

    .banner-slogan {
        font-size: 20px;
    }

    .app-content-row {
        flex-direction: column;
    }

    .app-image {
        width: 100%;
        height: auto;
        max-height: 300px;
    }

    .header .container {
        flex-direction: column;
        gap: 0;
    }

    .logo-section {
        padding: 15px 0;
    }

    .nav {
        width: 100%;
        justify-content: stretch;
        flex-direction: column;
    }

    .nav-link {
        min-height: 50px;
        width: 100%;
        border-bottom: 1px solid #eee;
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    .contact-item {
        flex-direction: column;
        gap: 10px;
    }

    .contact-label {
        min-width: auto;
    }
}