* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", 思源黑体, sans-serif;
}
:root {
    --primary: #165DFF;
    --secondary: #FF7D00;
    --light: #F2F3F5;
    --dark: #1D2129;
    --gray: #4E5969;
    --light-gray: #86909C;
    --white: #FFFFFF;
    --green: #36CFC9;
}
html {
    scroll-behavior: smooth;
}
body {
    color: var(--dark);
    line-height: 1.6;
}
ul {
    list-style: none;
}
a {
    text-decoration: none;
    color: inherit;
}
.container {
    width: 1200px;
    margin: 0 auto;
}
.section {
    padding: 80px 0;
}
.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: bold;
    color: var(--dark);
    margin-bottom: 12px;
}
.section-subtitle {
    text-align: center;
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}
.btn-primary {
    background-color: var(--secondary);
    color: var(--white);
}
.btn-primary:hover {
    background-color: #e67000;
    transform: translateY(-2px);
}
.btn-outline {
    background-color: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}
.btn-outline:hover {
    background-color: var(--white);
    color: var(--primary);
}
.btn-light {
    background-color: var(--white);
    color: var(--primary);
}
.btn-light:hover {
    background-color: var(--light);
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 999;
}
.header-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-img {
    width: 60px;
    height: 60px;
}
.logo h1 {
    font-size: 22px;
    color: var(--primary);
    font-weight: bold;
}
.logo p {
    font-size: 12px;
    color: var(--gray);
}
.nav-list {
    display: flex;
    gap: 32px;
}
.nav-item a {
    font-size: 16px;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s ease;
}
.nav-item a:hover {
    color: var(--primary);
}
.header-contact {
    display: flex;
    align-items: center;
    gap: 20px;
}
.header-tel {
    font-size: 18px;
    font-weight: bold;
    color: var(--primary);
}
.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
}
.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    z-index: 998;
    padding: 20px 0;
}
.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 0 20px;
}
.mobile-nav-item a {
    font-size: 16px;
    padding: 8px 0;
    display: block;
    border-bottom: 1px solid var(--light);
}

/* Banner轮播 */
.banner {
    margin-top: 80px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary) 0%, #0d3b99 100%);
    display: flex;
    align-items: center;
    color: var(--white);
}
.banner-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.banner-content {
    max-width: 600px;
}
.banner-title {
    font-size: 48px;
    font-weight: bold;
    line-height: 1.2;
    margin-bottom: 20px;
}
.banner-desc {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}
.banner-btn-group {
    display: flex;
    gap: 20px;
}
.banner-img {
    width: 500px;
    height: 400px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* 优势模块 */
.advantage-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.advantage-item {
    padding: 40px 30px;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
    text-align: center;
}
.advantage-item:hover {
    transform: translateY(-10px);
}
.advantage-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.advantage-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 12px;
    color: var(--dark);
}
.advantage-desc {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
}

/* 检测项目模块 */
.project-section {
    background-color: var(--light);
}
.project-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.project-item {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}
.project-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
.project-img {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.project-content {
    padding: 24px;
}
.project-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 12px;
    color: var(--dark);
}
.project-desc {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 20px;
}
.project-btn {
    font-size: 14px;
    color: var(--primary);
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 流程模块 */
.process-list {
    display: flex;
    justify-content: space-between;
    position: relative;
}
.process-list::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 60px;
    right: 60px;
    height: 2px;
    background-color: var(--light);
    z-index: 1;
}
.process-item {
    width: 16%;
    text-align: center;
    position: relative;
    z-index: 2;
}
.process-step {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: var(--white);
    border: 4px solid var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 36px;
    font-weight: bold;
    color: var(--primary);
    transition: all 0.3s ease;
}
.process-item:hover .process-step {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.process-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 12px;
}
.process-desc {
    font-size: 14px;
    color: var(--gray);
}

/* 案例模块 */
.case-section {
    background-color: var(--light);
}
.case-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.case-item {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
}
.case-img {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.case-content {
    padding: 20px;
}
.case-title {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 12px;
}
.case-tag {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.case-tag span {
    padding: 4px 10px;
    background-color: var(--light);
    border-radius: 20px;
    font-size: 12px;
    color: var(--primary);
}

/* 资质模块 */
.qualification-list {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}
.qualification-item {
    width: 220px;
    height: 300px;
    background-color: var(--light);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.qualification-title {
    font-size: 20px;
    color: var(--primary);
    text-align: center;
    line-height: 1.5;
    padding: 0 20px;
}

/* 新闻模块 */
.news-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.news-item {
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}
.news-item:hover {
    transform: translateY(-8px);
}
.news-title {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-time {
    font-size: 12px;
    color: var(--light-gray);
    margin-bottom: 16px;
}
.news-btn {
    font-size: 14px;
    color: var(--primary);
    font-weight: bold;
}

/* CTA咨询模块 */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, #0d3b99 100%);
    color: var(--white);
    padding: 60px 0;
}
.cta-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.cta-content {
    max-width: 600px;
}
.cta-title {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 12px;
}
.cta-desc {
    font-size: 16px;
    opacity: 0.9;
}
.cta-form {
    width: 400px;
    background-color: var(--white);
    border-radius: 8px;
    padding: 30px;
}
.form-item {
    margin-bottom: 20px;
}
.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--light);
    border-radius: 4px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s ease;
}
.form-input:focus {
    border-color: var(--primary);
}
.form-btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
}

/* 底部Footer */
.footer {
    background-color: var(--dark);
    color: var(--white);
    padding: 60px 0 20px;
}
.footer-wrap {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}
.footer-logo h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--white);
}
.footer-info p {
    margin-bottom: 12px;
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.8;
}
.footer-nav h3 {
    font-size: 18px;
    margin-bottom: 20px;
}
.footer-nav-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-nav-item a {
    font-size: 14px;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}
.footer-nav-item a:hover {
    opacity: 1;
    color: var(--primary);
}
.footer-copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 12px;
    opacity: 0.6;
}

/* 悬浮咨询按钮 */
.float-contact {
    position: fixed;
    right: 20px;
    bottom: 50px;
    z-index: 990;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.float-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--secondary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: all 0.3s ease;
}
.float-btn:hover {
    transform: scale(1.1);
}
.float-tel {
    background-color: var(--primary);
}

/* 响应式适配 */
@media (max-width: 1200px) {
    .container {
        width: 96%;
    }
    .advantage-list, .project-list, .case-list, .news-list {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-list {
        flex-direction: column;
        gap: 40px;
    }
    .process-list::before {
        display: none;
    }
    .process-item {
        width: 100%;
        display: flex;
        align-items: center;
        gap: 20px;
        text-align: left;
    }
    .process-step {
        width: 80px;
        height: 80px;
        margin: 0;
        font-size: 24px;
    }
    .banner {
        height: auto;
        padding: 60px 0;
    }
    .banner-wrap {
        flex-direction: column;
        gap: 40px;
    }
    .banner-content {
        max-width: 100%;
        text-align: center;
    }
    .banner-btn-group {
        justify-content: center;
    }
    .banner-img {
        width: 100%;
        max-width: 500px;
    }
    .cta-wrap {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    .cta-form {
        width: 100%;
        max-width: 400px;
    }
    .footer-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.detail-banner {
    display: flex;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
}
.detail-banner img {
    width: 100%;
    max-width: 520px;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}
.detail-banner-content {
    max-width: 560px;
}
.detail-banner-content .section-title {
    text-align: left;
    margin-bottom: 16px;
}
.detail-summary {
    background-color: var(--light);
    border-radius: 12px;
    padding: 28px;
    margin-bottom: 40px;
    color: var(--dark);
}
.detail-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
.detail-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}
.detail-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
}
.detail-card ul {
    list-style: disc inside;
    color: var(--gray);
    line-height: 1.75;
}
.detail-back {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 26px;
    border-radius: 6px;
    background-color: var(--secondary);
    color: #fff;
    transition: background-color 0.3s ease;
}
.detail-back:hover {
    background-color: #e67000;
}
@media (max-width: 1200px) {
    .detail-banner {
        flex-direction: column;
    }
    .detail-list {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .section {
        padding: 50px 0;
    }
    .section-title {
        font-size: 28px;
    }
    .nav-list, .header-contact {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .banner-title {
        font-size: 32px;
    }
    .banner-desc {
        font-size: 16px;
    }
    .advantage-list, .project-list, .case-list, .news-list {
        grid-template-columns: 1fr;
    }
    .banner-btn-group {
        flex-direction: column;
        gap: 12px;
    }
    .btn {
        width: 100%;
    }
    .section-title {
        font-size: 28px;
    }
    .nav-list, .header-contact {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .banner-title {
        font-size: 32px;
    }
    .banner-desc {
        font-size: 16px;
    }
    .advantage-list, .project-list, .case-list, .news-list {
        grid-template-columns: 1fr;
    }
    .banner-btn-group {
        flex-direction: column;
        gap: 12px;
    }
    .btn {
        width: 100%;
    }
}

/* Standards Library */
.standards-entry-section {
    background-color: var(--light);
}
.standards-entry-wrap {
    background: linear-gradient(135deg, #ffffff 0%, #f7f9ff 100%);
    border: 1px solid #e7edf8;
    border-radius: 12px;
    padding: 36px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 28px;
    align-items: center;
}
.standards-entry-title {
    font-size: 28px;
    color: var(--dark);
    margin-bottom: 12px;
}
.standards-entry-desc {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.8;
    max-width: 720px;
    margin-bottom: 24px;
}
.standards-entry-btn {
    min-width: 180px;
}
.standards-entry-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}
.standards-stat-item {
    background-color: var(--white);
    border: 1px solid #e8ebf0;
    border-radius: 10px;
    padding: 16px 18px;
}
.standards-stat-value {
    font-size: 24px;
    color: var(--primary);
    font-weight: bold;
    line-height: 1.2;
}
.standards-stat-label {
    font-size: 13px;
    color: var(--gray);
}
.standards-page-hero {
    background: linear-gradient(135deg, #f8fbff 0%, #eef3ff 100%);
    padding-bottom: 36px;
}
.standards-page-back {
    display: inline-block;
    margin-top: 12px;
    padding: 10px 20px;
    border: 1px solid #d8e2ff;
    border-radius: 999px;
    color: var(--primary);
    background-color: var(--white);
    font-size: 14px;
    transition: all 0.2s ease;
}
.standards-page-back:hover {
    border-color: var(--primary);
    box-shadow: 0 6px 16px rgba(22, 93, 255, 0.16);
}
.standards-section {
    background-color: var(--light);
}
.standards-toolbar {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
    justify-content: center;
    flex-wrap: wrap;
}
.standards-search,
.standards-filter {
    height: 44px;
    border: 1px solid #d9dde4;
    border-radius: 8px;
    background-color: var(--white);
    color: var(--dark);
    font-size: 14px;
    padding: 0 14px;
    outline: none;
}
.standards-search {
    width: min(720px, 100%);
}
.standards-filter {
    min-width: 240px;
}
.standards-search:focus,
.standards-filter:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.12);
}
.standards-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.standard-item {
    background-color: var(--white);
    border: 1px solid #e8ebf0;
    border-radius: 10px;
    padding: 22px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.standard-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(0,0,0,0.08);
}
.standard-type {
    display: inline-block;
    font-size: 12px;
    color: var(--primary);
    background: rgba(22, 93, 255, 0.08);
    border-radius: 999px;
    padding: 4px 10px;
    margin-bottom: 10px;
}
.standard-title {
    font-size: 18px;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.5;
}
.standard-meta {
    font-size: 13px;
    color: var(--light-gray);
    margin-bottom: 10px;
}
.standard-desc {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
}
.standards-note {
    margin-top: 24px;
    color: var(--gray);
    font-size: 13px;
    text-align: center;
}

@media (max-width: 1200px) {
    .standards-entry-wrap {
        grid-template-columns: 1fr;
    }
    .standards-entry-title {
        font-size: 24px;
    }
    .standards-entry-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    .standards-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .standards-entry-wrap {
        padding: 24px;
    }
    .standards-entry-title {
        font-size: 22px;
    }
    .standards-entry-stats {
        grid-template-columns: 1fr;
    }
    .standards-toolbar {
        align-items: stretch;
    }
    .standards-search,
    .standards-filter {
        width: 100%;
        min-width: 0;
    }
}