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

:root {
    --primary-color: #1565C0;
    --secondary-color: #0D47A1;
    --accent-color: #1E88E5;
    --light-green: #E8F5E9;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: url('data:image/svg+xml,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><rect width="20" height="20" fill="%23f8f9fa"/><circle cx="10" cy="10" r="1" fill="%23e0e0e0"/></svg>') repeat;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 导航栏样式增强 */
.top-nav {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

/* 滚动时导航栏效果 */
.top-nav.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 30px rgba(0,0,0,0.1);
}

.top-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.02);
}

.logo img {
    height: 35px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: rotate(5deg);
}

.logo h1 {
    color: var(--primary-color);
    font-size: 22px;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 10px;
}

.nav-links li {
    position: relative;
}

.nav-links li a {
    text-decoration: none;
    color: #333;
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
    position: relative;
    overflow: hidden;
}

/* 导航项悬停效果 */
.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links li a:hover {
    color: var(--primary-color);
    animation: navHover 0.3s ease;
}

.nav-links li a:hover::after {
    width: 70%;
}

/* 当前活动页面样式 */
.nav-links li a.active {
    color: var(--primary-color);
}

.nav-links li a.active::after {
    width: 70%;
}

/* 波纹效果样式 */
.ripple {
    position: absolute;
    background: rgba(21, 101, 192, 0.2);
    border-radius: 50%;
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* 导航栏滚动动画 */
.top-nav {
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

/* 导航项悬停动画 */
@keyframes navHover {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-2px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 主要内容区域 */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.5)),
                url('https://img.freepik.com/free-photo/fleet-new-semi-trucks-arranged-row-trucking-depot_342744-1510.jpg') center/cover;
    background-blend-mode: multiply;
    padding: 160px 0 120px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, 
            rgba(255,255,255,0.15) 0%,
            rgba(255,255,255,0.08) 50%,
            transparent 50%);
    background-size: 250% 250%;
    animation: shine 15s linear infinite;
    opacity: 0.7;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at top right, rgba(21, 101, 192, 0.15), transparent 70%),
        radial-gradient(circle at bottom left, rgba(13, 71, 161, 0.15), transparent 70%);
    pointer-events: none;
}

@keyframes shine {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.slogan {
    position: relative;
    z-index: 3;
    margin-bottom: 60px;
    text-align: center;
    animation: fadeInUp 1.2s ease-out;
    padding: 0 20px;
}

.slogan h2 {
    font-size: 4.5em;
    margin-bottom: 30px;
    text-shadow: 3px 3px 25px rgba(0, 0, 0, 0.5);
    color: #fff;
    font-weight: 800;
    letter-spacing: 4px;
    line-height: 1.2;
    background: linear-gradient(120deg, #ffffff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: textShine 8s linear infinite;
}

@keyframes textShine {
    0% {
        background-position: -500px 0;
    }
    100% {
        background-position: 500px 0;
    }
}

.slogan p {
    font-size: 2em;
    color: #fff;
    text-shadow: 2px 2px 15px rgba(0, 0, 0, 0.6);
    letter-spacing: 3px;
    opacity: 0.95;
    font-weight: 300;
}

.search-box {
    position: relative;
    z-index: 3;
    background: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 25px;
    backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    max-width: 850px;
    margin: 0 auto;
    display: flex;
    gap: 25px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 100px rgba(255, 255, 255, 0.1);
    animation: fadeInUp 1s ease-out 0.3s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-box input {
    background: rgba(255, 255, 255, 0.98);
    border: none;
    padding: 20px 35px;
    border-radius: 15px;
    font-size: 18px;
    flex: 1;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
}

.search-box input:focus {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    outline: none;
}

.search-box button {
    background: var(--accent-color);
    padding: 20px 45px;
    border: none;
    border-radius: 15px;
    color: white;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.search-box button:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* 服务区域 */
.services {
    background: linear-gradient(rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.92)),
                url('https://img.freepik.com/free-photo/cargo-truck-parking-yard-evening_342744-1500.jpg') center/cover fixed;
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.services h2 {
    text-align: center;
    margin-bottom: 40px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-item {
    text-align: center;
    padding: 30px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--primary-color);
    transition: height 0.3s ease;
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.service-item:hover::before {
    height: 100%;
}

.service-icon {
    font-size: 54px;
    margin-bottom: 25px;
    transition: transform 0.3s ease;
}

.service-item:hover .service-icon {
    transform: scale(1.1);
}

.service-item h3 {
    margin-bottom: 10px;
    color: #333;
}

.service-item p {
    color: #666;
}

/* 企业文化区域 */
.values {
    background: linear-gradient(rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.94)),
                url('https://img.freepik.com/free-photo/trucks-logistics-hub-yard_342744-1546.jpg') center/cover fixed;
    padding: 60px 0;
    position: relative;
}

.values::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(180deg, transparent, rgba(0,0,0,0.03));
    pointer-events: none;
}

.values h2 {
    text-align: center;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.value-item {
    text-align: center;
    padding: 30px;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(0,0,0,0.05);
    overflow: hidden;
}

.value-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.value-item:hover::before {
    transform: scaleX(1);
}

.value-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.value-item h3 {
    color: var(--primary-color);
    font-size: 1.8em;
    margin-bottom: 20px;
}

.value-item p {
    color: #666;
    line-height: 1.6;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: white;
    padding: 60px 0 20px;
    background: #1a1a1a;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    color: var(--accent-color);
    font-size: 1.2em;
    position: relative;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--accent-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #fff;
}

/* 页脚版权区域样式优化 */
.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #888;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.copyright a {
    color: #888;
    text-decoration: none;
    transition: color 0.3s;
}

.copyright a:hover {
    color: #aaa;
}