/* ===== 全局重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #0a2e5c;
    --primary-light: #1a4a7a;
    --primary-dark: #061d3a;
    --accent: #00a8e8;
    --gray: #f4f6f9;
    --text-dark: #1a1a2e;
    --shadow: 0 20px 50px rgba(0,0,0,0.08);
    --radius: 16px;
    --transition: 0.3s ease;
}
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: #fff;
    color: var(--text-dark);
    line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航栏 ===== */
.navbar {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.04);
    position: sticky;
    top: 0;
    z-index: 999;
    padding: 12px 0;
    border-bottom: 1px solid rgba(0,0,0,0.03);
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--primary);
}
.logo i { color: var(--accent); margin-right: 8px; }
.nav-links {
    display: flex;
    gap: 6px;
    list-style: none;
    flex-wrap: wrap;
}
.nav-links a {
    padding: 8px 16px;
    border-radius: 40px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active-link {
    background: var(--primary);
    color: #fff;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 14px 34px;
    border-radius: 50px;
    font-weight: 600;
    background: var(--accent);
    color: #fff;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0,168,232,0.3); }
.btn-outline {
    background: transparent;
    box-shadow: inset 0 0 0 2px var(--primary);
    color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-accent { background: var(--accent); }

/* ===== 首页 ===== */
#home {
    background: linear-gradient(145deg, #f8faff 0%, #eef3fc 100%);
    min-height: calc(100vh - 140px);
    display: flex;
    align-items: center;
    padding: 40px 0;
}
#home .hero-content { max-width: 700px; margin: 0 auto; text-align: center; }
#home h1 { font-size: 3.2rem; font-weight: 800; color: var(--primary); }
#home h1 .highlight { color: var(--accent); }
#home p { font-size: 1.2rem; color: #3a4a6a; margin: 20px 0 30px; }
.home-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 30px;
}
.home-card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(4px);
    border-radius: var(--radius);
    padding: 24px 20px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255,255,255,0.5);
}
.home-card i { font-size: 2rem; color: var(--accent); margin-bottom: 10px; }
.home-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
.home-card p { font-size: 0.9rem; color: #5a6a8a; }

/* ===== 子页面通用 ===== */
.page-title {
    text-align: center;
    margin-bottom: 50px;
}
.page-title h2 { font-size: 2.4rem; color: var(--primary); }
.page-title .line {
    width: 60px;
    height: 4px;
    background: var(--accent);
    margin: 12px auto 0;
    border-radius: 4px;
}
.page-title p { color: #5a6a8a; max-width: 600px; margin: 10px auto 0; }

/* ===== 关于 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-text h3 { font-size: 1.8rem; color: var(--primary); margin-bottom: 16px; }
.about-text p { color: #3a4a6a; margin-bottom: 16px; }
.about-stats {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 20px;
    margin-top: 30px;
}
.about-stats .stat {
    background: var(--gray);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
}
.about-stats .number { font-size: 2.2rem; font-weight: 700; color: var(--primary); }
.about-stats .desc { font-size: 0.9rem; color: #5a6a8a; }

/* ===== 业务 & 装备 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
    gap: 30px;
}
.service-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 30px 24px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.02);
    border: 1px solid rgba(0,0,0,0.02);
    text-align: center;
    transition: var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.service-card .icon {
    font-size: 2.5rem;
    color: var(--accent);
    background: rgba(0,168,232,0.08);
    padding: 14px;
    border-radius: 60px;
    display: inline-block;
    margin-bottom: 14px;
}
.service-card h3 { font-size: 1.2rem; margin-bottom: 8px; color: var(--primary); }
.service-card p { color: #5a6a8a; font-size: 0.95rem; }
.service-card.emergency .icon { color: #e67e22; background: rgba(230,126,34,0.08); }
.service-card.emergency { border-left: 4px solid #e67e22; }
.equipment-card { border-top: 4px solid #e67e22; }

/* ===== 动态 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px,1fr));
    gap: 30px;
}
.news-item {
    background: var(--gray);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}
.news-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.news-item .date { color: var(--accent); font-weight: 600; font-size: 0.85rem; }
.news-item h4 { font-size: 1.2rem; margin: 8px 0; }
.news-item p { color: #5a6a8a; }

/* ===== 联系 ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}
.contact-info .info-item {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}
.contact-info .info-item i {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.contact-form {
    background: #fff;
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #dce1ec;
    border-radius: 10px;
    margin-bottom: 16px;
    font-family: inherit;
}
.contact-form textarea { min-height: 120px; resize: vertical; }

/* ===== 页脚 ===== */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.7);
    padding: 30px 0;
    text-align: center;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .home-grid { grid-template-columns: 1fr; }
    .about-grid, .contact-wrapper { grid-template-columns: 1fr; }
    .nav-links a { padding: 6px 12px; font-size: 0.85rem; }
    #home h1 { font-size: 2.4rem; }
}
/* ===== 首页新增样式（三大业务卡片 + 模块） ===== */

/* 业务卡片（首页三大类） */
.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.business-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,0,0,0.04);
    transition: var(--transition);
}
.business-card:hover { transform: translateY(-6px); box-shadow: 0 25px 50px rgba(0,0,0,0.1); }
.business-card .icon {
    font-size: 2.8rem;
    color: var(--accent);
    margin-bottom: 16px;
    display: inline-block;
}
.business-card h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 6px;
}
.business-card .learn-more {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.business-card .learn-more:hover { gap: 10px; }

/* 公司简介摘要 */
.about-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-summary-text h3 {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 16px;
}
.about-summary-text p {
    color: #3a4a6a;
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 20px;
}
.about-summary-image {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    border-radius: var(--radius);
    padding: 40px;
    color: #fff;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.about-summary-image h4 {
    font-size: 1.4rem;
    margin-bottom: 12px;
}
.about-summary-image p { opacity: 0.85; }
.about-summary-image .tags {
    margin-top: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
    font-size: 0.9rem;
    opacity: 0.8;
}
.about-summary-image .tags i { color: var(--accent); margin-right: 6px; }

/* 新闻预览 */
.news-preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.news-preview-item {
    background: var(--gray);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}
.news-preview-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.news-preview-item .date {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.85rem;
}
.news-preview-item h4 {
    font-size: 1.1rem;
    margin: 8px 0 10px;
    color: var(--primary);
}
.news-preview-item p {
    color: #5a6a8a;
    font-size: 0.95rem;
}
.news-preview-item .read-link {
    color: var(--accent);
    font-weight: 600;
    display: inline-block;
    margin-top: 12px;
}

/* 通用标题（首页用） */
.section-title {
    text-align: center;
    margin-bottom: 40px;
}
.section-title h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}
.section-title .line {
    width: 50px;
    height: 3px;
    background: var(--accent);
    margin: 10px auto 0;
    border-radius: 4px;
}
.section-title p {
    color: #5a6a8a;
    font-size: 1rem;
    margin-top: 8px;
}

/* Hero首屏（首页用） */
#home {
    background: linear-gradient(145deg, #f8faff 0%, #eef3fc 100%);
    padding: 60px 0 70px;
}
#home .hero-content { max-width: 700px; margin: 0 auto; text-align: center; }
#home h1 { font-size: 3.2rem; font-weight: 800; color: var(--primary); }
#home h1 .highlight { color: var(--accent); }
#home .hero-sub { font-size: 1.2rem; color: #3a4a6a; margin: 20px 0 30px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 响应式 */
@media (max-width: 768px) {
    .business-grid { grid-template-columns: 1fr; }
    .about-summary { grid-template-columns: 1fr; }
    .news-preview-grid { grid-template-columns: 1fr; }
    #home h1 { font-size: 2.2rem; }
}