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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: #fafbfc;
    min-height: 100vh;
    color: #1f2937;
    line-height: 1.6;
}

/* 顶部导航栏 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #e8e8e8;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h1 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #111827;
    letter-spacing: 0.5px;
}

.nav-buttons {
    display: flex;
    gap: 15px;
    align-items: center;
}

.nav-btn {
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav-btn-primary {
    background: #2563eb;
    color: white;
    box-shadow: 0 1px 3px rgba(37, 99, 235, 0.2);
}

.nav-btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
}

.nav-btn-secondary {
    background: #fff;
    color: #2563eb;
    border: 1.5px solid #e5e7eb;
}

.nav-btn-secondary:hover {
    background: #f9fafb;
    border-color: #2563eb;
    color: #1d4ed8;
    transform: translateY(-1px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Hero区域 */
.hero {
    text-align: center;
    padding: 80px 20px;
    margin-bottom: 50px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #111827;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: #6b7280;
    font-weight: 400;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* 主要内容区域 */
.main-content {
    background: white;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    padding: 50px 40px;
    margin-bottom: 30px;
}

section {
    margin-bottom: 50px;
}

section:last-child {
    margin-bottom: 0;
}

h2 {
    font-size: 2rem;
    color: #111827;
    margin-bottom: 35px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.intro-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: #2563eb;
    border-radius: 1px;
}

/* 公司介绍样式 */
.intro-section {
    text-align: justify;
}

.intro-content {
    max-width: 900px;
    margin: 0 auto;
}

.intro-text {
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 25px;
    color: #374151;
    text-indent: 2em;
}

.intro-text:last-child {
    margin-bottom: 0;
}


/* 二维码区域样式 */
.qr-section {
    text-align: center;
}

.qr-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px;
}

.qr-box {
    background: #f9fafb;
    border-radius: 12px;
    padding: 30px;
    max-width: 350px;
    width: 100%;
    border: 1px solid #e5e7eb;
}

.qr-image {
    width: 250px;
    height: 250px;
    margin: 0 auto 20px;
    border-radius: 8px;
    display: block;
}

.qr-placeholder {
    width: 250px;
    height: 250px;
    margin: 0 auto 20px;
    background: white;
    border: 2px dashed #ddd;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.qr-placeholder::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    background: 
        repeating-linear-gradient(0deg, transparent, transparent 8px, #000 8px, #000 9px),
        repeating-linear-gradient(90deg, transparent, transparent 8px, #000 8px, #000 9px);
    border-radius: 5px;
    opacity: 0.1;
}

.qr-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
    z-index: 1;
}

.qr-hint {
    font-size: 0.9rem;
    color: #999;
    text-align: center;
    z-index: 1;
}

.qr-hint-small {
    font-size: 0.75rem;
    color: #bbb;
    margin-top: 5px;
    z-index: 1;
}

.qr-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 5px;
}

.qr-english {
    font-size: 0.9rem;
    color: #999;
    font-style: italic;
}

/* 页脚样式 */
.footer {
    text-align: center;
    color: #6b7280;
    padding: 40px 20px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.footer p {
    margin-bottom: 5px;
}

.footer-sub {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
        height: 60px;
        flex-wrap: wrap;
    }

    .nav-logo h1 {
        font-size: 1.4rem;
    }

    .nav-buttons {
        gap: 10px;
    }

    .nav-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .hero {
        padding: 50px 20px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .main-content {
        padding: 30px 20px;
    }

    h2 {
        font-size: 1.5rem;
    }

    .intro-text {
        font-size: 1rem;
        text-indent: 1.5em;
    }

    .qr-box {
        padding: 20px;
    }

    .qr-image {
        width: 200px;
        height: 200px;
    }

    .qr-placeholder {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 15px 20px;
    }

    .nav-logo h1 {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }

    .nav-buttons {
        width: 100%;
        flex-direction: column;
        gap: 10px;
    }

    .nav-btn {
        width: 100%;
        text-align: center;
        padding: 10px 20px;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }
}