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

:root {
    --primary-brown: #8B6F47;
    --dark-brown: #5C4A37;
    --light-brown: #A68B5B;
    --tan: #D4C4A8;
    --peach-brown: #C9A882;
    --cream: #F5F1E8;
    --white: #FFFFFF;
    --text-dark: #333333;
    --text-light: #666666;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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

/* 导航栏 */
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-mountains {
    position: relative;
    width: 80px;
    height: 50px;
}

.mountain {
    position: absolute;
    bottom: 0;
    border-left: 3px solid transparent;
    border-right: 3px solid transparent;
    border-bottom: 3px solid var(--text-dark);
}

.mountain-1 {
    left: 0;
    width: 25px;
    height: 30px;
    background: linear-gradient(to bottom, var(--light-brown), var(--primary-brown));
    clip-path: polygon(0% 100%, 20% 40%, 50% 60%, 80% 30%, 100% 50%, 100% 100%);
    z-index: 4;
}

.mountain-2 {
    left: 15px;
    width: 20px;
    height: 35px;
    background: var(--dark-brown);
    clip-path: polygon(0% 100%, 30% 20%, 70% 40%, 100% 25%, 100% 100%);
    z-index: 2;
}

.mountain-3 {
    left: 30px;
    width: 22px;
    height: 28px;
    background: var(--peach-brown);
    clip-path: polygon(0% 100%, 25% 50%, 60% 35%, 100% 45%, 100% 100%);
    z-index: 3;
}

.mountain-4 {
    left: 45px;
    width: 25px;
    height: 25px;
    background: var(--tan);
    clip-path: polygon(0% 100%, 20% 60%, 50% 40%, 100% 50%, 100% 100%);
    z-index: 1;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-text-cn {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.2;
}

.logo-text-en {
    font-size: 10px;
    color: var(--text-light);
    letter-spacing: 0.5px;
    line-height: 1.2;
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-brown);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-brown);
    transition: width 0.3s;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, var(--cream) 0%, var(--tan) 100%);
    padding: 120px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 100"><path d="M0,50 Q300,0 600,50 T1200,50 L1200,100 L0,100 Z" fill="white"/></svg>') no-repeat;
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 2.5rem;
    color: var(--dark-brown);
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-brown);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: background-color 0.3s, transform 0.3s;
}

.btn-primary:hover {
    background-color: var(--dark-brown);
    transform: translateY(-2px);
}

/* 章节标题 */
.section-title {
    text-align: center;
    font-size: 2rem;
    color: var(--dark-brown);
    margin-bottom: 50px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-brown);
}

/* 公司介绍 */
.about {
    padding: 80px 20px;
    background-color: var(--white);
}

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

.about-text h3 {
    color: var(--primary-brown);
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.business-scope,
.product-list {
    list-style: none;
    padding-left: 0;
    margin: 20px 0;
}

.business-scope li,
.product-list li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-light);
    line-height: 1.8;
}

.business-scope li::before,
.product-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-brown);
    font-weight: bold;
}

/* 业务范围 */
.business {
    padding: 80px 20px;
    background-color: var(--cream);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.business-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.business-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.business-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.business-card h3 {
    color: var(--dark-brown);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.business-card p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* 联系我们 */
.contact {
    padding: 80px 20px;
    background-color: var(--white);
}

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

.contact-info {
    display: grid;
    gap: 30px;
}

.contact-item {
    padding: 25px;
    background-color: var(--cream);
    border-radius: 8px;
    border-left: 4px solid var(--primary-brown);
}

.contact-item h3 {
    color: var(--primary-brown);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.contact-item p {
    color: var(--text-light);
    line-height: 1.8;
}

.en-name {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: 5px;
}

/* 页脚 */
.footer {
    background-color: var(--dark-brown);
    color: var(--tan);
    padding: 30px 20px;
    text-align: center;
}

.footer p {
    margin: 5px 0;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-menu {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .logo {
        flex-direction: column;
        text-align: center;
    }

    .logo-mountains {
        margin: 0 auto;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

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

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

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

    .about-text h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 20px;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .about,
    .business,
    .contact {
        padding: 50px 20px;
    }
}