/* 基础重置与变量定义 */
:root {
    --primary-color: #8B0000;
    --secondary-color: #D4AF37;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 12px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
    --border-radius: 8px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.main-header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo a {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo .subtitle {
    font-size: 0.9rem;
    color: #666;
    margin-left: 10px;
}

/* 桌面导航 */
.desktop-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.desktop-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

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

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 24px;
    position: relative;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    position: absolute;
    transition: var(--transition);
}

.mobile-menu-btn span:nth-child(1) { top: 0; }
.mobile-menu-btn span:nth-child(2) { top: 10px; }
.mobile-menu-btn span:nth-child(3) { top: 20px; }

/* 移动端导航 */
.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 999;
}

.mobile-nav ul {
    list-style: none;
    padding: 20px;
}

.mobile-nav li {
    margin-bottom: 15px;
}

.mobile-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.1rem;
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

/* 内容区域样式 */
section {
    padding: 80px 0;
}

.about-section {
    background-color: var(--light-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.profile-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #5a0000 100%);
    color: var(--white);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.btn:hover {
    background-color: #5a0000;
    transform: translateY(-2px);
}

/* 页脚样式 */
.main-footer {
    background-color: #222;
    color: var(--white);
    padding: 40px 0;
    text-align: center;
}