* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --primary: #044199;
    --primary-light: #0066f9;
    --primary-dark: #022c66;
    --accent: #00b4ff;
    --accent-orange: #ff7b00;
    --text-dark: #222831;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f5f7fa;
    --bg-white: #ffffff;
    --border: #e5e7eb;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(4, 65, 153, 0.12);
}
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
    overflow-x: hidden;
}
a {
    display: inline-block;
    margin: 0 10px;
    color: #b8bbc0;
}
a:link {
    color: #b8bbc0;
    text-decoration: none;
}
/* 未访问链接*/
a:visited {
    color: #b8bbc0;
    text-decoration: none;
}
/* 已访问链接 */
a:hover {
    color: #f60;
    text-decoration: none;
}
/* 鼠标移动到链接上 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}
/* 顶部导航 */
.top-bar {
    background: var(--primary-dark);
    color: #fff;
    padding: 8px 0;
    font-size: 13px;
}
.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-bar-left span {
    margin-right: 20px;
}
.top-bar-right a {
    color: #fff;
    text-decoration: none;
    margin-left: 15px;
}
.top-bar-left i {
    margin-right: 5px;
}
.nav-bar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s;
}
.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 18px;
}
.logo-text {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary);
}

.logo-img {
    max-height: 48px;    /* 适配导航栏高度，可根据logo实际比例微调 */
    width: auto;
    display: block;
    object-fit: contain; /* 保持logo原始比例，不拉伸变形 */
}
.logo-text small {
    display: block;
    font-size: 11px;
    color: var(--text-gray);
    font-weight: normal;
    letter-spacing: 1px;
}
.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}
.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}
.nav-menu a:hover {
    color: var(--primary);
}
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}
.nav-menu a:hover::after {
    width: 100%;
}
.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: bold;
    color: var(--primary);
}
/* Hero首屏 */
.hero {
    background: linear-gradient(135deg, #022c66 0%, #044199 50%, #1a66d4 100%);
    color: #fff;
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0,180,255,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}
.hero-text h1 {
    font-size: 42px;
    line-height: 1.3;
    margin-bottom: 20px;
    font-weight: 700;
}
.hero-text h1 span {
    color: var(--accent);
}
.hero-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 30px;
    line-height: 1.8;
}
.hero-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 35px;
}
.hero-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
}
.hero-feature-item .icon {
    width: 28px;
    height: 28px;
    background: rgba(0,180,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 14px;
    flex-shrink: 0;
}
.hero-btns {
    display: flex;
    gap: 20px;
}
.hero-btns a{
    color: #fff;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}
.btn-primary {
    background: var(--accent-orange);
    color: #fff;
    box-shadow: 0 4px 15px rgba(255,123,0,0.3);
}
.btn-primary:hover {
    background: #ff8c1a;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255,123,0,0.4);
}
.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
}
.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
.product-main {
    width: 100%;
    max-width: 450px;
    aspect-ratio: 1 / 1;
    background: linear-gradient(145deg, #f0f4f8, #d9e2ec);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}
.product-main-image {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 12px;
}
/* 数据浮动标签 */
.float-tag {
    position: absolute;
    background: #fff;
    padding: 12px 18px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    color: var(--text-dark);
    font-size: 13px;
    animation: float 3s ease-in-out infinite;
}
.float-tag strong {
    display: block;
    font-size: 20px;
    color: var(--primary);
}
.tag1 {
    top: 30px;
    left: -20px;
    animation-delay: 0s;
}
.tag2 {
    top: 120px;
    right: -30px;
    animation-delay: 1s;
}
.tag3 {
    bottom: 80px;
    left: -10px;
    animation-delay: 2s;
}
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}
/* 通用区块标题 */
.section {
    padding: 55px 0;
}
.section-gray {
    background: var(--bg-light);
}
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-tag {
    display: inline-block;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 12px;
    text-transform: uppercase;
}
.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}
.section-title span {
    color: var(--primary);
}
.section-desc {
    font-size: 16px;
    color: var(--text-gray);
    max-width: 650px;
    margin: 0 auto;
}
/* 核心优势 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}
.advantage-card {
    background: #fff;
    padding: 35px 25px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border);
}
.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.adv-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(4,65,153,0.1), rgba(0,180,255,0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--primary);
    transition: all 0.3s;
}
.advantage-card:hover .adv-icon {
    background: linear-gradient(0deg, #003894, #0058dd);
    color: #fff;
    transform: scale(1.1);
}
.advantage-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--text-dark);
}
.advantage-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}
/* 技术参数区 */
.tech-section {
    background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
}
.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.tech-image-box {
    background: linear-gradient(135deg, #eef3f9, #dce5f0);
    border-radius: 12px;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    position: relative;
}
.tech-diagram-image {
    display: block;
    width: 100%;
    max-width: 100%;
    max-height: 480px;
    height: auto;
    object-fit: contain;
}
.tech-list h3 {
    font-size: 28px;
    margin-bottom: 25px;
    color: var(--accent-orange);
}
.tech-item {
    margin-bottom: 20px;
    padding-left: 20px;
    border-left: 3px solid var(--primary);
}
.tech-item h4 {
    font-size: 17px;
    color: var(--primary);
    margin-bottom: 8px;
}
.tech-item p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}
.tech-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px dashed var(--border);
}
.tech-highlight-item {
    text-align: center;
}
.tech-highlight-item strong {
    display: block;
    font-size: 28px;
    color: var(--primary);
    font-weight: 700;
}
.tech-highlight-item span {
    font-size: 13px;
    color: var(--text-gray);
}
/* 应用场景 */
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.scene-card {
    position: relative;
    height: 280px;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
}
.scene-bg {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s;
}
.scene-card:hover .scene-bg {
    transform: scale(1.1);
}
/* 新增：应用场景缩略图 */
.scene-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s;
}
.scene-card:hover .scene-thumb {
    transform: scale(1.1);
}
.scene-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px 20px;
    background: linear-gradient(transparent, rgba(2,44,102,0.9));
    color: #fff;
	text-align: center;
}
.scene-overlay h4 {
    font-size: 18px;
    margin-bottom: 5px;
	text-align: center;
}
.scene-overlay p {
    font-size: 13px;
    opacity: 0.85;
	text-align: center;
}
.scene-1 {
    background: linear-gradient(135deg, #1a5276, #2980b9);
}
.scene-2 {
    background: linear-gradient(135deg, #1e6657, #27ae60);
}
.scene-3 {
    background: linear-gradient(135deg, #7d3c98, #9b59b6);
}
.scene-4 {
    background: linear-gradient(135deg, #b9770e, #f39c12);
}
/* 新增：热销产品展示区块 复刻场景区块风格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.product-card {
    position: relative;
    /* height: 280px; */
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    background: #f0f4f8;
}
.product-img {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.5s;
    position: relative;
    background: #fff;
    box-shadow: 0 0 40px 0 rgba(0, 0, 0, 0.1);
}
.product-card:hover .product-img {
    transform: scale(1.05);
}
.product-1 {
    background: linear-gradient(135deg, #e8f0fa, #c8d8ec);
}
.product-2 {
    background: linear-gradient(135deg, #e0f5f0, #b8e0d5);
}
.product-3 {
    background: linear-gradient(135deg, #f0e8f8, #d8c8ec);
}
.product-4 {
    background: linear-gradient(135deg, #f8f0e0, #ecd8b0);
}
/* 新增：产品缩略图 */
.product-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.product-unit {
    width: 120px;
    height: 180px;
    position: relative;
}
.unit-body {
    width: 100%;
    height: 130px;
    background: linear-gradient(180deg, #fff 0%, #e8eef5 100%);
    border: 2px solid #b8c8dc;
    border-radius: 6px;
    position: absolute;
    bottom: 0;
}
.unit-body::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 90px;
    height: 50px;
    background: repeating-linear-gradient(
    90deg,
    #b8c8dc 0px,
    #b8c8dc 2px,
    #d0dbe8 2px,
    #d0dbe8 5px
    );
    border-radius: 3px;
}
.unit-fan {
    width: 70px;
    height: 70px;
    background: #fff;
    border: 2px solid #b8c8dc;
    border-radius: 50%;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
}
.unit-fan::after {
    content: '';
    width: 50px;
    height: 50px;
    border: 3px solid #044199;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 3s linear infinite;
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}
.unit-badge {
    position: absolute;
    top: 20px;
    right: -10px;
    background: #ff7b00;
    color: #fff;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
    z-index: 2;
}
.product-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px 20px;
    background: linear-gradient(transparent, #d1dbeb); /** #003894 **/
    color: #fff;
    text-align: center;
}
.product-overlay a:hover{
    font-size: 18px;
    color: var(--accent-orange);
}
.product-overlay h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--text-dark);
	text-overflow: ellipsis;
	overflow: hidden;
	white-space: nowrap;
}
.product-overlay h4:hover{
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--primary);
}
.product-overlay p {
    font-size: 13px;
    opacity: 0.85;
    color: var(--text-dark);
}
/* 工程案例 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}
.case-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}
.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}
.case-image {
    height: 280px;
    background: linear-gradient(135deg, #dce5f0, #b8c8dc);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 40px;
    position: relative;
    overflow: hidden;
}
.case-image img {
    transition: transform 0.5s;
}
.case-card:hover .case-image img {
    transform: scale(1.1);
}
.case-tag {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--accent-orange);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
}
.case-content {
    padding: 22px;
}
.case-content h4 {
    font-size: 17px;
    margin-bottom: 10px;
    color: var(--text-dark);
	text-align: center;
	text-overflow: ellipsis;
	overflow: hidden;
	white-space: nowrap;
}
.case-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 12px;
}
.case-info i {
    margin-right: 5px;
}
.case-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 15px;
}
.case-data {
    display: flex;
    gap: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
}
.case-data-item {
    flex: 1;
    text-align: center;
}
.case-data-item strong {
    display: block;
    color: var(--primary);
    font-size: 16px;
}
.case-data-item span {
    font-size: 12px;
    color: var(--text-light);
}
/* 产品型号对比 */
.models-table-wrap {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}
.models-table {
    width: 100%;
    border-collapse: collapse;
}
.models-table th {
    background: var(--primary);
    color: #fff;
    padding: 18px 15px;
    text-align: center;
    font-weight: 600;
    font-size: 15px;
}
.models-table th:first-child {
    /* text-align: left; */
    background: var(--primary-dark);
}
.models-table td {
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
.models-table td:first-child {
    /* text-align: left; */
    font-weight: 700;
    color: var(--text-dark);
    background: var(--bg-light);
}
.models-table tr:last-child td {
    border-bottom: none;
}
.models-table tr:hover td {
    background: rgba(4,65,153,0.03);
}
.model-recommend {
    background: rgba(255,123,0,0.08) !important;
    position: relative;
}
.recommend-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-orange);
    color: #fff;
    padding: 3px 12px;
    border-radius: 10px;
    font-size: 11px;
    white-space: nowrap;
}
/* FAQ */
.faq-container {
    max-width: 850px;
    margin: 0 auto;
}
.faq-item {
    background: #fff;
    border-radius: 8px;
    margin-bottom: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.3s;
}
.faq-item.active {
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(4,65,153,0.1);
}
.faq-question {
    padding: 20px 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    font-size: 16px;
    color: var(--text-dark);
}
.faq-toggle-icon {
    font-size: 16px;
    color: var(--primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}
.faq-item.active .faq-toggle-icon {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.faq-item.active .faq-answer {
    max-height: 300px;
}
.faq-answer-content {
    padding: 0 25px 20px;
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.8;
}
/* 询单表单 */
.contact-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.contact-section::before {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0,180,255,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    position: relative;
    z-index: 2;
}
.contact-info h2 {
    font-size: 32px;
    margin-bottom: 20px;
}
.contact-info p {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 30px;
    line-height: 1.8;
}
.contact-list {
    list-style: none;
}
.contact-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 15px;
}
.contact-list li div {
    color: #9a9b9d;
}
.contact-list .icon {
    width: 45px;
    height: 45px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    color: #fff;
}
.contact-list strong {
    display: block;
    font-size: 18px;
    margin-bottom: 3px;
    color: #fff;
}
.contact-form-wrap {
    background: #fff;
    border-radius: 12px;
    padding: 35px;
    color: var(--text-dark);
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.contact-form-wrap h3 {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--text-dark);
}
.contact-form-wrap .form-subtitle {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 25px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 6px;
    color: var(--text-dark);
    font-weight: 500;
}
.form-group label span {
    color: #e74c3c;
}
.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s;
    font-family: inherit;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(4,65,153,0.1);
}
textarea.form-control {
    resize: vertical;
    min-height: 90px;
}
.submit-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}
.submit-btn:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(4,65,153,0.3);
}
/* 底部承诺栏 */
.promise-bar {
    background: #fff;
    padding: 40px 0;
    border-bottom: 1px solid var(--border);
}
.promise-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.promise-item {
    display: flex;
    align-items: center;
    gap: 12px;
}
.promise-icon {
    width: 45px;
    height: 45px;
    background: rgba(4,65,153,0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 20px;
    flex-shrink: 0;
}
.promise-text strong {
    display: block;
    font-size: 15px;
    color: var(--text-dark);
}
.promise-text span {
    font-size: 12px;
    color: var(--text-gray);
}
/* 页脚 */
.footer {
    background: #1a2332;
    color: rgba(255,255,255,0.7);
    padding: 50px 0 20px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 30px;
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 20px;
}
.footer-col ul {
    list-style: none;
}
.footer-col ul li {
    margin-bottom: 10px;
    font-size: 14px;
}
.footer-col ul li a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-col ul li a:hover {
    color: var(--accent);
}

.footer-col {
    /* 中间 */
    text-align: center;
}
.footer-brand {
    /* 居左：默认即可 */
    text-align: left;
}

.footer-bottom p a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-bottom p a:hover {
    color: var(--accent);
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 15px;
}
.footer-logo {
    color: #fff;
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 15px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
}
/* 浮动咨询按钮 */
.float-consult {
    position: fixed;
    right: 20px;
    bottom: 50px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.float-btn {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(4,65,153,0.3);
    transition: all 0.3s;
    font-size: 22px;
    position: relative;
}
.float-btn:hover {
    transform: scale(1.1);
    background: var(--primary-light);
}
.float-btn.phone {
    background: var(--accent-orange);
    box-shadow: 0 4px 15px rgba(255,123,0,0.3);
}
.float-btn.phone:hover {
    background: #ff8c1a;
}
.float-btn .tip {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
.float-btn:hover .tip {
    opacity: 1;
}
/* 响应式 */
@media (max-width: 992px) {
    .hero-content,
    .tech-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .tech-image-box {
        min-height: 360px;
        padding: 32px;
    }
    .tech-diagram-image {
        max-height: 440px;
    }
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .scenes-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .promise-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .nav-menu {
        display: none;
    }
}
@media (max-width: 600px) {
    .hero-text h1 {
        font-size: 28px;
    }
    .section-title {
        font-size: 26px;
    }
    .advantages-grid,
    .scenes-grid,
    .products-grid,
    .cases-grid,
    .promise-grid {
        grid-template-columns: 1fr;
    }
    .tech-image-box {
        min-height: 0;
        padding: 20px;
    }
    .tech-diagram-image {
        max-height: 360px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-btns {
        flex-direction: column;
    }
    .btn {
        width: 100%;
    }
}
/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
.scenes-grid > a:hover .scene-overlay,
.scenes-grid > a:hover .scene-overlay h4,
.product-card:hover .product-overlay,
.product-card:hover .product-overlay a,
.product-card:hover .product-overlay h4 {
    color: var(--primary);
    transition: color 0.3s ease;
}

/* 半透明背景只作用于外层区块 */
.scenes-grid > a:hover .scene-overlay,
.product-card:hover .product-overlay {
    background: rgba(255, 255, 255, 0.6);
}

/* 去掉标题和链接后面的色块 */
.scenes-grid > a:hover .scene-overlay h4,
.scenes-grid > a:hover .scene-overlay a,
.product-card:hover .product-overlay h4,
.product-card:hover .product-overlay a {
    background: transparent;
}

.cases-grid > a:hover .case-content h4 {
    color: #044199;
    transition: color 0.3s ease;
}

.scenes-grid > a:hover .scene-overlay p,
.product-card:hover .product-overlay p {
    color: var(--text-dark);
    transition: color 0.3s ease;
}

/************************* 回到顶部 *********************************/
.diyform_float_sidebar {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.diyform_float_item {
    position: relative;
}

.diyform_float_sidebar a,
.diyform_float_sidebar .back-to-top {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 65px;
    height: 65px;
    background: #044199;
    color: #fff;
    border: none;
    border-radius: 8px 0 0 8px;
    font-size: 26px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    margin: 0;
    padding: 0;
}

.diyform_float_sidebar a:hover,
.diyform_float_sidebar .back-to-top:hover {
    background: #0066f9;
}

/* 回到顶部：默认隐藏，有show类才显示 */
.back-to-top {
    opacity: 0;
    visibility: hidden;
}
.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.diyform_float_tip {
    position: absolute;
    right: 75px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    background: #333;
    color: #fff;
    padding: 8px 14px;
    border-radius: 4px;
    font-size: 18px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
	font-weight: 700;
}
.diyform_float_item:hover .diyform_float_tip {
    opacity: 1;
    visibility: visible;
}

/* ========== 移动端适配 768px以下 ========== */
@media (max-width: 768px) {
    .diyform_float_sidebar {
        gap: 10px;
    }
    .diyform_float_sidebar a,
    .diyform_float_sidebar .back-to-top {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    .diyform_float_tip {
        right: 58px;
        padding: 5px 10px;
        font-size: 13px;
    }
}