/* 全局样式 */
:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --secondary-color: #6c757d;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: #333;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    color: #222;
}

section {
    padding: 80px 0;
}

.section-header {
    margin-bottom: 60px;
}

/* 导航样式 */
.navbar {
    padding: 15px 0;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-size: 1.5rem;
}

.navbar-light .navbar-nav .nav-link {
    color: #444;
    font-weight: 500;
    padding: 8px 16px;
    transition: all 0.3s ease;
}

.navbar-light .navbar-nav .nav-link:hover,
.navbar-light .navbar-nav .nav-link.active {
    color: var(--primary-color);
}

/* 快捷导航栏 */
.quick-nav {
    background-color: #f8f9fa;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.quick-link {
    color: #555;
    padding: 5px 15px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.quick-link:hover {
    color: var(--primary-color);
}

/* Hero区域 */
.hero-section {
    padding: 120px 0;
    background-color: #ffffff;
    position: relative;
    overflow: hidden;
}

.hero-img {
    position: relative;
}

.floating-icons {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.floating-icons i {
    position: absolute;
    font-size: 2rem;
    animation: float 6s infinite ease-in-out;
}

.floating-icons i:nth-child(1) {
    top: 20%;
    left: 15%;
    animation-delay: 0s;
}

.floating-icons i:nth-child(2) {
    top: 40%;
    left: 75%;
    animation-delay: 1s;
}

.floating-icons i:nth-child(3) {
    top: 70%;
    left: 30%;
    animation-delay: 2s;
}

.floating-icons i:nth-child(4) {
    top: 30%;
    left: 50%;
    animation-delay: 3s;
}

.floating-icons i:nth-child(5) {
    top: 60%;
    left: 70%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.stats {
    margin-top: 40px;
}

.stat-item {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* 特性卡片 */
.feature-card {
    padding: 30px;
    border-radius: 10px;
    background-color: #fff;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-align: center;
}

/* 系统卡片 */
.system-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    background-color: #fff;
}

.system-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.system-card .card-header {
    padding: 20px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
}

.system-card .card-header i {
    font-size: 1.5rem;
    margin-right: 15px;
}

.system-card .card-body {
    padding: 25px;
}

.system-card .card-footer {
    padding: 15px 25px;
    background-color: transparent;
    border-top: 1px solid #eee;
}

.system-features {
    margin: 20px 0 0;
    padding: 0;
    list-style: none;
}

.system-features li {
    margin-bottom: 10px;
}

/* 时间线样式 */
.timeline {
    position: relative;
    padding: 0;
    list-style: none;
}

.timeline:before {
    content: "";
    position: absolute;
    top: 0;
    left: 19px;
    height: 100%;
    width: 2px;
    background-color: #eee;
}

.timeline-item {
    position: relative;
    padding-left: 50px;
    margin-bottom: 30px;
}

.timeline-icon {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timeline-content {
    padding: 15px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* 优势项样式 */
.advantage-item {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    background-color: #f8f9fa;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    background-color: #e9ecef;
}

/* 战略列表 */
.strategy-list {
    padding-left: 20px;
}

.strategy-list li {
    margin-bottom: 20px;
}

.strategy-list li strong {
    color: var(--success-color);
    display: block;
    margin-bottom: 5px;
}

/* 表格样式 */
.table {
    margin-bottom: 0;
}

.table th, .table td {
    padding: 15px;
    vertical-align: middle;
}

/* 联系信息 */
.contact-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(13, 110, 253, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(13, 110, 253, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    border: none;
    z-index: 999;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

/* 页脚样式 */
footer {
    background-color: #222;
}

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

/* 响应式调整 */
@media (max-width: 992px) {
    section {
        padding: 60px 0;
    }
    
    .hero-section {
        padding: 80px 0;
    }
    
    .hero-img {
        margin-top: 40px;
    }
}

@media (max-width: 768px) {
    .section-header {
        margin-bottom: 40px;
    }
    
    .feature-card,
    .system-card {
        margin-bottom: 20px;
    }
    
    .timeline:before {
        left: 15px;
    }
    
    .timeline-item {
        padding-left: 40px;
    }
    
    .timeline-icon {
        width: 30px;
        height: 30px;
        font-size: 0.8rem;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 1s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}