/* -----------------------------------------------------------
   鑫跃养车 - 科技感企业 CMS 核心样式
   配色方案：
   - 背景: #101214 (深灰黑) / #ffffff (白)
   - 主色/点缀: #e53935 (红色 - 传承石油/激情)
   - 辅助/科技: #00bcd4 (青色 - 数字化/智能)
   - 文字: #e0e0e0 (亮灰) / #212121 (深灰)
----------------------------------------------------------- */

:root {
    --primary-red: #e53935;
    --tech-cyan: #00bcd4;
    --dark-bg: #101214;
    --dark-card: #1a1d21;
    --text-light: #e0e0e0;
    --text-muted: #9e9e9e;
}

body {
    font-family: 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
    background-color: #f4f7f6; /* 默认页面浅色背景 */
    color: #333;
    overflow-x: hidden;
}

/* 导航栏优化 - 悬浮透明感 */
.navbar-tech {
    background-color: rgba(16, 18, 20, 0.95) !important;
    backdrop-filter: blur(5px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.navbar-tech .navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: #fff !important;
    letter-spacing: 1px;
}

.navbar-tech .navbar-brand span {
    color: var(--primary-red);
}

.navbar-tech .nav-link {
    color: rgba(255,255,255,0.8) !important;
    font-weight: 500;
    margin: 0 5px;
    transition: all 0.3s ease;
    position: relative;
}

.navbar-tech .nav-link:hover,
.navbar-tech .nav-item.active .nav-link {
    color: #fff !important;
}

.navbar-tech .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--primary-red);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.navbar-tech .nav-link:hover::after {
    width: 80%;
}

/* 巨幕部分 - 科技感核心 */
.hero-section-tech {
    position: relative;
    background-color: var(--dark-bg);
    color: #fff;
    padding: 160px 0 120px 0;
    /* 建议后期替换为真实的专业维修车间高清图，或者带有几何线条的抽象图 */
    background-image: linear-gradient(135deg, rgba(16,18,20,0.9) 0%, rgba(26,29,33,0.8) 100%), 
                      url('https://images.unsplash.com/photo-1517649763962-0c623066013b?q=80&w=2070'); 
    background-size: cover;
    background-position: center;
    background-attachment: fixed; /* 视差效果 */
}

.hero-section-tech::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCIgdmlld0JveD0iMCAwIDQwIDQwIj48ZyBmaWxsLXJ1bGU9ImV2ZW5vZGQiPjxnIGZpbGw9IiNmZmYiIGZpbGwtb3BhY2l0eT0iMC4wNSI+PHBhdGggZD0iTTAgMGg0MHY0MEgwVjB6bTIwIDIwaDIwdjIwSDIWMjB6TTAgMjBoMjB2MjBIMFYyMHoyMCAwaDIwdjIwSDIwVjB6Ii8+PC9nPjwvZz48L3N2Zz4=');
    opacity: 0.3;
}

.hero-title {
    font-weight: 800;
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, #b0b0b0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 40px;
    font-weight: 300;
    letter-spacing: 1px;
}

/* 科技感按钮 */
.btn-tech {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
    padding: 12px 30px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-tech:hover {
    border-color: var(--primary-red);
    color: #fff;
    box-shadow: 0 0 20px rgba(229, 57, 53, 0.5);
}

.btn-tech::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: all 0.5s ease;
}

.btn-tech:hover::before {
    left: 100%;
}

/* 首页卡片样式 */
.tech-card {
    background: #fff;
    border: none;
    border-radius: 0;
    padding: 40px 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    height: 100%;
    border-top: 3px solid transparent;
}

.tech-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-top-color: var(--primary-red);
}

.tech-card .icon-box {
    width: 70px;
    height: 70px;
    background-color: rgba(229, 57, 53, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    font-size: 1.75rem;
    color: var(--primary-red);
    transition: all 0.3s ease;
}

.tech-card:hover .icon-box {
    background-color: var(--primary-red);
    color: #fff;
}

.tech-card .card-title {
    font-weight: 700;
    font-size: 1.25rem;
    color: #212121;
    margin-bottom: 15px;
}

/* 深色数据展示区 */
.stats-section {
    background-color: var(--dark-bg);
    color: #fff;
    padding: 80px 0;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0IiBoZWlnaHQ9IjQiIHZpZXdCb3g9IjAgMCA0IDQiPjxwYXRoIGQ9Ik0xIDNoMnYxSDF6TTAgMGgxdjFIMHpxMSAxSDF2MUgxem0xLTExaDF2MUgxeiIgZmlsbD0iI2ZmZiIgZmlsbC1vcGFjaXR5PSIwLjA1IiBmaWxsLXJ1bGU9ImV2ZW5vZGQiLz48L3N2Zz4=');
}

.stat-item .counter {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--tech-cyan);
    line-height: 1;
}

.stat-item .stat-desc {
    color: rgba(255,255,255,0.6);
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

/* 页脚样式 */
.footer-tech {
    background-color: #0c0e10;
    color: rgba(255,255,255,0.6);
    padding: 60px 0 30px 0;
    font-size: 0.9rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-tech h5 {
    color: #fff;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-tech .footer-link {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color 0.3s ease;
    display: block;
    margin-bottom: 10px;
}

.footer-tech .footer-link:hover {
    color: var(--tech-cyan);
}