@charset "UTF-8";
@import url("./font/f2216486202607041783095426.css?v=1.0");
/* ========== 1. 设计变量与基础重置 ========== */
:root {
    /* 主色体系 */
    --primary: #e60316;/*#ff6b00*/
    --primary-dark: #e55f00;
    --primary-light: #fff2e6;
    --accent: #0faced;/*#0b5ed7*/
    --accent-dark: #084298;
    --accent-light: #e8f0fe;

    /* 中性色 */
    --gray-900: #1a2332;
    --gray-700: #4a5568;
    --gray-600: #6b7280;
    --gray-500: #9ca3af;
    --gray-300: #d1d5db;
    --gray-100: #f3f4f6;
    --gray-50: #f8fafc;
    --white: #ffffff;

    /* 边框与阴影 */
    --border: #e5e7eb;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(11, 94, 215, 0.12);

    /* 圆角与间距 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --section-padding: 80px 0;
    
    /* 字体大小 */
    --size-sm: 14px;
    --size-md: 16px;
    --size-lg: 32px;

    /* 过渡动画 */
    
    --transform: translateY(-2px);
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
    font-synthesis: weight;
}

ul { list-style: none; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { color: var(--gray-700); font-weight: 700; line-height: 1.3; }

/* ========== 2. 通用公共类 ========== */
.section-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    padding: 8px 18px;
    font-size: var(--size-sm);
    font-weight: 500;
    border-radius: 30px;
    background: var(--accent-light);
    color: var(--primary);
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}

.section-tag i {
    margin-right: 5px;
}

.section-header h2 {
    font-size: var(--size-lg);
    margin-bottom: 12px;
}

.section-header p {
    color: var(--gray-600);
    font-size: 16px;
    line-height: 1.6;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    margin: 20px auto 0;
}

.section-buttons {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 20px;
}

/* 按钮通用 */
.btn {
    /*display: inline-flex;*/
    /*justify-content: center;*/
    /*align-items: center;*/
    /*gap: 8px;*/
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: var(--size-md);
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn i {
    color: var(--white);
    margin-left: 5px;
}

.btn i.fa-search {
    color: var(--white);
    margin-right: 5px!important;
} 

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    box-shadow: 0 4px 12px rgba(11, 94, 215, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(11, 94, 215, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline i {
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(11, 94, 215, 0.35);
}

.btn-outline:hover i {
    color: var(--white);
}

.fas {
  background-image: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
  transform: translateZ(0);
  overflow: visible !important;
  font-size: inherit;
  line-height: 1;
  padding: 3px;
}

.text-gradient {
  background-image: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.arrow-animation {
  animation: arrowMove 1.5s infinite;
}

@keyframes arrowMove {
  0% { transform: translateX(0); }
  50% { transform: translateX(5px); }
  100% { transform: translateX(0); }
}

.section-inner img {
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.section-inner img:hover {
    box-shadow: var(--shadow-lg);
    transform: scale(1.03);
}

.check-icon::before {
    font-family: "Font Awesome 6 Free";
    font-weight: 900; /* 实心图标为 900，空心图标为 400 */
    content: "\f058"; /* fa-check-circle 对应的 Unicode 编码 */
    display: inline-block;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== 3. 顶部导航 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--border);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-logo-icon {
    width: 55px;
    height: 55px;
    transition: var(--transition);
}

.nav-logo-text {
    font-family:'f2216486202607041783095426';
    font-size: 26px;
    font-weight: 700!important;
    color: var(--gray-700);
    text-shadow: var(--shadow-md);
    transition: var(--transition);
}

.nav-logo .nav-logo-icon:hover{
    transform: scale(1.03);
}

.nav-logo .nav-logo-text:hover{
    text-shadow: var(--shadow-lg);
    transform: scale(1.03);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-item {
    height: 100%;
    display: flex;
    align-items: center;
    position: relative;
}

.nav-item > a {
    height: 100%;
    padding: 0 6px;
    font-size: 15px;
    color: var(--gray-700);
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-item > a.active,
.nav-item > a:hover {
    color: var(--primary);
}

.sub-arrow {
    font-size: 12px;
    transition: transform 0.2s;
}

.has-sub:hover .sub-arrow {
    transform: rotate(180deg);
}

.sub-menu {
    position: absolute;
    top: 40px;
    left: -25px;
    min-width: 180px;
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: 6px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: all 0.2s ease;
}

.has-sub:hover .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sub-link {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--gray-600);
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sub-link i {
    display: none;
    font-size: 10px;
}

.sub-link:hover {
    background: var(--accent-light);
    color: var(--primary);
}

.sub-link:hover i {
    display: block;
}

.nav-cta {
    background: var(--accent);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 600 !important;
}

.nav-cta:hover {
    background: var(--accent-dark);
    color: var(--white) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--gray-900);
    border-radius: 1px;
    transition: var(--transition);
}

.imgs-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 0 auto;
}

.imgs-group img {
    width: 100%;
    display: block;
    object-fit: cover;
    border-radius: 6px; 
}

.big-img {
    grid-column: 1 / -1;
}

/* ========== 4. banner首屏 ========== */
.banner {
    position: relative;
    padding: 140px 0 80px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-light), #e0e7ff);
}

.banner-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    pointer-events: none;
}

.banner-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.banner-badge {
    display: inline-block;
    padding: 8px 18px;
    font-size: var(--size-sm);
    font-weight: 500;
    border-radius: 30px;
    color: var(--primary);
    background: var(--accent-light);
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}

.banner-badge i {
    margin-right: 5px;
}

.banner-content h1 {
    font-size: 20px;
    margin-bottom: 15px;
}

.banner-content h1 span {
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-content .banner-slogan {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}
.banner-content .banner-slogan span {
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-content > p {
    font-size: var(--size-md);
    color: var(--gray-600);
}

.banner-card-stack {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.banner-card {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.banner-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-icon-large {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 12px;
}

.stat-num {
    font-size: 45px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.5;
    margin-bottom: 8px;
}

.stat-num span {
    font-size: 18px;
    color: var(--gray-600);
    font-weight: 600;
}

.card-label, .stat-label {
    font-size: 16px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ========== 5. 关于我们 ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image-wrapper {
    position: relative;
}

.about-image-inner {
    width: 100%;
    height: 100%; 
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--primary);
    box-shadow: var(--shadow-md);
}

.about-image-inner .img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 关键属性：保持比例，填满容器，超出部分裁剪 */
    object-position: center;
}

.about-image-badge {
    position: absolute;
    top: -20px;
    right: -20px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    color: var(--primary);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    font-size: 24px;
    font-weight: 800;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}
.about-image-badge:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.about-image-badge span {
    display: block;
    font-size: 13px;
    font-weight: 400;
    opacity: 0.9;
}

.about-content h3 {
    font-size: 19px;
    margin-bottom: 10px;
}

.about-us p {
    text-indent: 2em;
    margin-bottom: 10px;
    color: var(--gray-600);
    font-size: var(--size-md);
    
}

.about-us p strong {
    color: var(--gray-600);
}

/*.about-features {*/
/*    display: grid;*/
/*    grid-template-columns: 1fr 1fr;*/
/*    gap: 12px;*/
/*    margin-top: 24px;*/
/*}*/

/*.about-feature {*/
/*    display: flex;*/
/*    align-items: center;*/
/*    gap: 8px;*/
/*    font-size: var(--size-md);*/
/*    color: var(--gray-700);*/
/*    font-weight: 700;*/
/*}*/

/*.about-feature i {*/
/*    display: flex;*/
/*    justify-content: center;*/
/*    align-items: center;*/
/*    width:30px;*/
/*    color: var(--primary);*/
/*    font-size: 20px;*/
/*}*/
.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 20px;
}

.about-feature {
    text-align: center;
    padding: 15px 20px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(11, 94, 215, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.about-feature:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(11, 94, 215, 0.15);
}

.about-feature i {
    font-size: 30px;
    margin-bottom: 10px;
}

.about-feature h4 {
    font-size: 16px;
    color: var(--gray-700);
    margin-bottom: 10px;
}

.about-feature p {
    font-size: 14px;
    color: var(--gray-600);
}

@media (max-width: 992px) {
    .about-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 600px) {
    .about-features {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}
/* ========== 6. 数据统计 ========== */
.stats-section {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    padding: 60px 0;
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-number span {
    color: var(--white);
}

.stat-desc {
    font-size: 15px;
    opacity: 0.9;
}

/* ========== 7. 服务项目 ========== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.service-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 19px;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 20px;
    line-height: 1.7;
}

.service-link {
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.service-link:hover {
    color: var(--accent);
    gap: 10px;
}

/* ========== 8. 产品展示 ========== */
.product-section {
    background: var(--gray-50);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.product-img {
    position: relative;
    height: 220px;
    overflow: hidden;
    background: var(--gray-100);
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img img {
    transform: scale(1.06);
}

.product-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.product-body {
    padding: 22px 24px 26px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-body h3 {
    font-size: 19px;
    margin-bottom: 10px;
}

.product-spec {
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 12px;
    font-weight: 500;
}

.product-desc {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 16px;
}

.product-features, .service-features {
    margin-bottom: 18px;
}

.product-features li, .service-features li {
    font-size: 13px;
    color: var(--gray-600);
    padding: 4px 0;
    padding-left: 18px;
    position: relative;
}

.product-features li::before, .service-features li::before {
    position: absolute;
    left: 0;
    color: var(--primary);
    font-size: 12px;
}

.product-bottom {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px dashed var(--border);
}

.product-price {
    font-size: 15px;
    color: var(--accent);
    font-weight: 600;
}

.product-more {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-more:hover {
    color: var(--accent);
    gap: 10px;
}

/* ========== 9. 工程案例 ========== */
.cases-section {
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.case-img-bg {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--primary);
}

.case-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(0, 0, 0, 0.6);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}

.case-body {
    padding: 20px 24px;
}

.case-body h3 {
    font-size: 17px;
    margin-bottom: 10px;
}

.case-body p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ========== 10. 新闻资讯 ========== */
.news-section {
    background: var(--gray-50);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.news-image {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-light), #e0e7ff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 42px;
    color: var(--primary);
}

.news-body {
    padding: 22px 24px;
}

.news-date {
    font-size: 13px;
    color: var(--gray-500);
    display: block;
    margin-bottom: 10px;
}

.news-title {
    font-size: 17px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-excerpt {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========== 11. 核心优势 ========== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    text-align: center;
    padding: 32px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.advantage-card:hover {
    background: var(--primary-light);
    border-color: transparent;
    transform: translateY(-4px);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 18px;
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    background: var(--primary);
    color: var(--white);
    transform: scale(1.1);
}

.advantage-card h3 {
    font-size: 17px;
    margin-bottom: 10px;
}

.advantage-card p {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ========== 12. 施工流程 ========== */
.process-section {
    background: var(--gray-50);
}

.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    position: relative;
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
    margin-bottom: 8px;
}

.step-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--white);
    border: 3px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 16px;
    box-shadow: var(--shadow-sm);
}

.process-step h3 {
    font-size: 17px;
    margin-bottom: 8px;
}

.process-step p {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.6;
    padding: 0 10px;
}

.process-connector {
    flex: 0 0 40px;
    height: 3px;
    background: var(--primary-light);
    margin-top: 48px;
}
/* ========== FAQ 常见问题模块 ========== */
.faq-section {
    background-color: #f8fafc;
}

.faq-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.faq-item {
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    text-align: left;
    background: none;
    border: none;
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f1f5f9;
}

.faq-icon {
    font-size: 14px;
    color: #2563eb;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

/* 展开状态 */
.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    margin: 0;
    color: #475569;
    line-height: 1.8;
    font-size: 15px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .faq-list {
        grid-template-columns: 1fr;
    }
    .faq-question {
        padding: 16px 18px;
        font-size: 15px;
    }
    .faq-answer p {
        padding: 0 18px 16px;
        font-size: 14px;
    }
}
/* ========== 13. 联系我们与表单 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}

.contact-info h3 {
    font-size: 22px;
    margin-bottom: 24px;
}

.contact-info-list {
    margin-bottom: 24px;
}

.contact-info-list li {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.ci-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.contact-info-list strong {
    display: block;
    color: var(--gray-900);
    margin-bottom: 4px;
    font-size: 15px;
}

.contact-info-list p {
    color: var(--gray-600);
    font-size: 14px;
    line-height: 1.5;
}

.service-range {
    display: flex;
    gap: 10px;
    padding: 16px;
    background: var(--accent-light);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--gray-700);
}

.service-range i {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-form-card {
    background: var(--white);
    padding: 36px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.contact-form-card h3 {
    font-size: 20px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-form-card h3 i {
    color: var(--primary);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.form-group.full {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--gray-700);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--gray-900);
    background: var(--white);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(11, 94, 215, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-submit {
    grid-column: 1 / -1;
    margin-top: 8px;
}

.form-submit .btn {
    width: 100%;
    justify-content: center;
    padding: 14px;
    font-size: 16px;
}

/* ========== 14. 页脚 ========== */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding-top: 60px;
}

.footer-inner {
    padding-bottom: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 16px;
    color: var(--gray-500);
}

.footer-credential p {
    font-size: 13px;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-credential i {
    color: var(--accent);
}

.footer-col h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

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

.footer-links a {
    font-size: 14px;
    color: var(--gray-500);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.6;
}

.footer-contact i {
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: var(--gray-500);
}

.footer-bottom a {
    color: var(--gray-500);
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* ========== 15. 回到顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border: none;
    cursor: pointer;
    font-size: 16px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 0.8;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top.visible i{
    color: var(--white);
}

.back-to-top:hover {
    opacity: 1;
    transform: translateY(-4px);
}

/* ========== 16. 入场动画 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.7s ease forwards;
    opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }
.delay-7 { animation-delay: 0.7s; }

/* ========== 17. 响应式适配 ========== */
@media (max-width: 992px) {
    :root {
        --section-padding: 60px 0;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        height: calc(100vh - 72px);
        background: var(--white);
        flex-direction: column;
        padding: 30px 24px;
        gap: 20px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }

    .nav-links.open {
        transform: translateX(0);
    }

    .nav-toggle {
        display: flex;
    }

    .banner-inner,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .banner-content h1 {
        font-size: 36px;
    }

    .services-grid,
    .product-grid,
    .cases-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .process-steps {
        flex-direction: column;
        gap: 0;
    }

    .process-connector {
        width: 3px;
        height: 30px;
        margin: 0 auto;
        flex: 0 0 30px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 600px) {
    .section-header h2 {
        font-size: 26px;
    }

    .banner-content h1 {
        font-size: 30px;
    }

    .services-grid,
    .product-grid,
    .cases-grid,
    .news-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .contact-form-card {
        padding: 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}